From 92229a57bba10d5bbf469221c32a18d4bed642f4 Mon Sep 17 00:00:00 2001 From: Yang Zhong Date: Fri, 2 Jun 2017 14:06:46 +0800 Subject: accel: move kvm related accelerator files into accel/ move kvm related accelerator files into accel/ subdirectory, also create one stub subdirectory, which will include accelerator's stub files. Signed-off-by: Yang Zhong Message-Id: <1496383606-18060-5-git-send-email-yang.zhong@intel.com> Signed-off-by: Paolo Bonzini --- Makefile.objs | 1 + Makefile.target | 4 +- accel/Makefile.objs | 2 + accel/kvm/Makefile.objs | 1 + accel/kvm/kvm-all.c | 2633 +++++++++++++++++++++++++++++++++++++++++++++ accel/kvm/trace-events | 15 + accel/stubs/Makefile.objs | 1 + accel/stubs/kvm-stub.c | 158 +++ kvm-all.c | 2633 --------------------------------------------- kvm-stub.c | 158 --- trace-events | 13 - 11 files changed, 2812 insertions(+), 2807 deletions(-) create mode 100644 accel/kvm/Makefile.objs create mode 100644 accel/kvm/kvm-all.c create mode 100644 accel/kvm/trace-events create mode 100644 accel/stubs/Makefile.objs create mode 100644 accel/stubs/kvm-stub.c delete mode 100644 kvm-all.c delete mode 100644 kvm-stub.c diff --git a/Makefile.objs b/Makefile.objs index 871eca80e9..6e5c706994 100644 --- a/Makefile.objs +++ b/Makefile.objs @@ -163,6 +163,7 @@ trace-events-subdirs += qom trace-events-subdirs += linux-user trace-events-subdirs += qapi trace-events-subdirs += accel/tcg +trace-events-subdirs += accel/kvm trace-events-files = $(SRC_PATH)/trace-events $(trace-events-subdirs:%=$(SRC_PATH)/%/trace-events) diff --git a/Makefile.target b/Makefile.target index 73cd9c6ad7..3d49f29457 100644 --- a/Makefile.target +++ b/Makefile.target @@ -88,7 +88,7 @@ all: $(PROGS) stap ######################################################### # cpu emulator library -obj-y = exec.o +obj-y += exec.o obj-y += accel/ obj-y += tcg/tcg.o tcg/tcg-op.o tcg/optimize.o obj-y += tcg/tcg-common.o tcg/tcg-runtime.o @@ -99,7 +99,6 @@ obj-y += target/$(TARGET_BASE_ARCH)/ obj-y += disas.o obj-$(call notempty,$(TARGET_XML_FILES)) += gdbstub-xml.o obj-$(call lnot,$(CONFIG_HAX)) += hax-stub.o -obj-$(call lnot,$(CONFIG_KVM)) += kvm-stub.o obj-$(CONFIG_LIBDECNUMBER) += libdecnumber/decContext.o obj-$(CONFIG_LIBDECNUMBER) += libdecnumber/decNumber.o @@ -140,7 +139,6 @@ ifdef CONFIG_SOFTMMU obj-y += arch_init.o cpus.o monitor.o gdbstub.o balloon.o ioport.o numa.o obj-y += qtest.o bootdevice.o obj-y += hw/ -obj-$(CONFIG_KVM) += kvm-all.o obj-y += memory.o obj-y += memory_mapping.o obj-y += dump.o diff --git a/accel/Makefile.objs b/accel/Makefile.objs index 11ad823609..cd5702f347 100644 --- a/accel/Makefile.objs +++ b/accel/Makefile.objs @@ -1,2 +1,4 @@ obj-$(CONFIG_SOFTMMU) += accel.o +obj-y += kvm/ obj-y += tcg/ +obj-y += stubs/ diff --git a/accel/kvm/Makefile.objs b/accel/kvm/Makefile.objs new file mode 100644 index 0000000000..85351e7de7 --- /dev/null +++ b/accel/kvm/Makefile.objs @@ -0,0 +1 @@ +obj-$(CONFIG_KVM) += kvm-all.o diff --git a/accel/kvm/kvm-all.c b/accel/kvm/kvm-all.c new file mode 100644 index 0000000000..75feffa504 --- /dev/null +++ b/accel/kvm/kvm-all.c @@ -0,0 +1,2633 @@ +/* + * QEMU KVM support + * + * Copyright IBM, Corp. 2008 + * Red Hat, Inc. 2008 + * + * Authors: + * Anthony Liguori + * Glauber Costa + * + * This work is licensed under the terms of the GNU GPL, version 2 or later. + * See the COPYING file in the top-level directory. + * + */ + +#include "qemu/osdep.h" +#include + +#include + +#include "qemu-common.h" +#include "qemu/atomic.h" +#include "qemu/option.h" +#include "qemu/config-file.h" +#include "qemu/error-report.h" +#include "qapi/error.h" +#include "hw/hw.h" +#include "hw/pci/msi.h" +#include "hw/pci/msix.h" +#include "hw/s390x/adapter.h" +#include "exec/gdbstub.h" +#include "sysemu/kvm_int.h" +#include "sysemu/cpus.h" +#include "qemu/bswap.h" +#include "exec/memory.h" +#include "exec/ram_addr.h" +#include "exec/address-spaces.h" +#include "qemu/event_notifier.h" +#include "trace.h" +#include "hw/irq.h" + +#include "hw/boards.h" + +/* This check must be after config-host.h is included */ +#ifdef CONFIG_EVENTFD +#include +#endif + +/* KVM uses PAGE_SIZE in its definition of KVM_COALESCED_MMIO_MAX. We + * need to use the real host PAGE_SIZE, as that's what KVM will use. + */ +#define PAGE_SIZE getpagesize() + +//#define DEBUG_KVM + +#ifdef DEBUG_KVM +#define DPRINTF(fmt, ...) \ + do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0) +#else +#define DPRINTF(fmt, ...) \ + do { } while (0) +#endif + +#define KVM_MSI_HASHTAB_SIZE 256 + +struct KVMParkedVcpu { + unsigned long vcpu_id; + int kvm_fd; + QLIST_ENTRY(KVMParkedVcpu) node; +}; + +struct KVMState +{ + AccelState parent_obj; + + int nr_slots; + int fd; + int vmfd; + int coalesced_mmio; + struct kvm_coalesced_mmio_ring *coalesced_mmio_ring; + bool coalesced_flush_in_progress; + int broken_set_mem_region; + int vcpu_events; + int robust_singlestep; + int debugregs; +#ifdef KVM_CAP_SET_GUEST_DEBUG + struct kvm_sw_breakpoint_head kvm_sw_breakpoints; +#endif + int many_ioeventfds; + int intx_set_mask; + /* The man page (and posix) say ioctl numbers are signed int, but + * they're not. Linux, glibc and *BSD all treat ioctl numbers as + * unsigned, and treating them as signed here can break things */ + unsigned irq_set_ioctl; + unsigned int sigmask_len; + GHashTable *gsimap; +#ifdef KVM_CAP_IRQ_ROUTING + struct kvm_irq_routing *irq_routes; + int nr_allocated_irq_routes; + unsigned long *used_gsi_bitmap; + unsigned int gsi_count; + QTAILQ_HEAD(msi_hashtab, KVMMSIRoute) msi_hashtab[KVM_MSI_HASHTAB_SIZE]; +#endif + KVMMemoryListener memory_listener; + QLIST_HEAD(, KVMParkedVcpu) kvm_parked_vcpus; +}; + +KVMState *kvm_state; +bool kvm_kernel_irqchip; +bool kvm_split_irqchip; +bool kvm_async_interrupts_allowed; +bool kvm_halt_in_kernel_allowed; +bool kvm_eventfds_allowed; +bool kvm_irqfds_allowed; +bool kvm_resamplefds_allowed; +bool kvm_msi_via_irqfd_allowed; +bool kvm_gsi_routing_allowed; +bool kvm_gsi_direct_mapping; +bool kvm_allowed; +bool kvm_readonly_mem_allowed; +bool kvm_vm_attributes_allowed; +bool kvm_direct_msi_allowed; +bool kvm_ioeventfd_any_length_allowed; +bool kvm_msi_use_devid; +static bool kvm_immediate_exit; + +static const KVMCapabilityInfo kvm_required_capabilites[] = { + KVM_CAP_INFO(USER_MEMORY), + KVM_CAP_INFO(DESTROY_MEMORY_REGION_WORKS), + KVM_CAP_LAST_INFO +}; + +int kvm_get_max_memslots(void) +{ + KVMState *s = KVM_STATE(current_machine->accelerator); + + return s->nr_slots; +} + +static KVMSlot *kvm_get_free_slot(KVMMemoryListener *kml) +{ + KVMState *s = kvm_state; + int i; + + for (i = 0; i < s->nr_slots; i++) { + if (kml->slots[i].memory_size == 0) { + return &kml->slots[i]; + } + } + + return NULL; +} + +bool kvm_has_free_slot(MachineState *ms) +{ + KVMState *s = KVM_STATE(ms->accelerator); + + return kvm_get_free_slot(&s->memory_listener); +} + +static KVMSlot *kvm_alloc_slot(KVMMemoryListener *kml) +{ + KVMSlot *slot = kvm_get_free_slot(kml); + + if (slot) { + return slot; + } + + fprintf(stderr, "%s: no free slot available\n", __func__); + abort(); +} + +static KVMSlot *kvm_lookup_matching_slot(KVMMemoryListener *kml, + hwaddr start_addr, + hwaddr end_addr) +{ + KVMState *s = kvm_state; + int i; + + for (i = 0; i < s->nr_slots; i++) { + KVMSlot *mem = &kml->slots[i]; + + if (start_addr == mem->start_addr && + end_addr == mem->start_addr + mem->memory_size) { + return mem; + } + } + + return NULL; +} + +/* + * Find overlapping slot with lowest start address + */ +static KVMSlot *kvm_lookup_overlapping_slot(KVMMemoryListener *kml, + hwaddr start_addr, + hwaddr end_addr) +{ + KVMState *s = kvm_state; + KVMSlot *found = NULL; + int i; + + for (i = 0; i < s->nr_slots; i++) { + KVMSlot *mem = &kml->slots[i]; + + if (mem->memory_size == 0 || + (found && found->start_addr < mem->start_addr)) { + continue; + } + + if (end_addr > mem->start_addr && + start_addr < mem->start_addr + mem->memory_size) { + found = mem; + } + } + + return found; +} + +int kvm_physical_memory_addr_from_host(KVMState *s, void *ram, + hwaddr *phys_addr) +{ + KVMMemoryListener *kml = &s->memory_listener; + int i; + + for (i = 0; i < s->nr_slots; i++) { + KVMSlot *mem = &kml->slots[i]; + + if (ram >= mem->ram && ram < mem->ram + mem->memory_size) { + *phys_addr = mem->start_addr + (ram - mem->ram); + return 1; + } + } + + return 0; +} + +static int kvm_set_user_memory_region(KVMMemoryListener *kml, KVMSlot *slot) +{ + KVMState *s = kvm_state; + struct kvm_userspace_memory_region mem; + + mem.slot = slot->slot | (kml->as_id << 16); + mem.guest_phys_addr = slot->start_addr; + mem.userspace_addr = (unsigned long)slot->ram; + mem.flags = slot->flags; + + if (slot->memory_size && mem.flags & KVM_MEM_READONLY) { + /* Set the slot size to 0 before setting the slot to the desired + * value. This is needed based on KVM commit 75d61fbc. */ + mem.memory_size = 0; + kvm_vm_ioctl(s, KVM_SET_USER_MEMORY_REGION, &mem); + } + mem.memory_size = slot->memory_size; + return kvm_vm_ioctl(s, KVM_SET_USER_MEMORY_REGION, &mem); +} + +int kvm_destroy_vcpu(CPUState *cpu) +{ + KVMState *s = kvm_state; + long mmap_size; + struct KVMParkedVcpu *vcpu = NULL; + int ret = 0; + + DPRINTF("kvm_destroy_vcpu\n"); + + mmap_size = kvm_ioctl(s, KVM_GET_VCPU_MMAP_SIZE, 0); + if (mmap_size < 0) { + ret = mmap_size; + DPRINTF("KVM_GET_VCPU_MMAP_SIZE failed\n"); + goto err; + } + + ret = munmap(cpu->kvm_run, mmap_size); + if (ret < 0) { + goto err; + } + + vcpu = g_malloc0(sizeof(*vcpu)); + vcpu->vcpu_id = kvm_arch_vcpu_id(cpu); + vcpu->kvm_fd = cpu->kvm_fd; + QLIST_INSERT_HEAD(&kvm_state->kvm_parked_vcpus, vcpu, node); +err: + return ret; +} + +static int kvm_get_vcpu(KVMState *s, unsigned long vcpu_id) +{ + struct KVMParkedVcpu *cpu; + + QLIST_FOREACH(cpu, &s->kvm_parked_vcpus, node) { + if (cpu->vcpu_id == vcpu_id) { + int kvm_fd; + + QLIST_REMOVE(cpu, node); + kvm_fd = cpu->kvm_fd; + g_free(cpu); + return kvm_fd; + } + } + + return kvm_vm_ioctl(s, KVM_CREATE_VCPU, (void *)vcpu_id); +} + +int kvm_init_vcpu(CPUState *cpu) +{ + KVMState *s = kvm_state; + long mmap_size; + int ret; + + DPRINTF("kvm_init_vcpu\n"); + + ret = kvm_get_vcpu(s, kvm_arch_vcpu_id(cpu)); + if (ret < 0) { + DPRINTF("kvm_create_vcpu failed\n"); + goto err; + } + + cpu->kvm_fd = ret; + cpu->kvm_state = s; + cpu->kvm_vcpu_dirty = true; + + mmap_size = kvm_ioctl(s, KVM_GET_VCPU_MMAP_SIZE, 0); + if (mmap_size < 0) { + ret = mmap_size; + DPRINTF("KVM_GET_VCPU_MMAP_SIZE failed\n"); + goto err; + } + + cpu->kvm_run = mmap(NULL, mmap_size, PROT_READ | PROT_WRITE, MAP_SHARED, + cpu->kvm_fd, 0); + if (cpu->kvm_run == MAP_FAILED) { + ret = -errno; + DPRINTF("mmap'ing vcpu state failed\n"); + goto err; + } + + if (s->coalesced_mmio && !s->coalesced_mmio_ring) { + s->coalesced_mmio_ring = + (void *)cpu->kvm_run + s->coalesced_mmio * PAGE_SIZE; + } + + ret = kvm_arch_init_vcpu(cpu); +err: + return ret; +} + +/* + * dirty pages logging control + */ + +static int kvm_mem_flags(MemoryRegion *mr) +{ + bool readonly = mr->readonly || memory_region_is_romd(mr); + int flags = 0; + + if (memory_region_get_dirty_log_mask(mr) != 0) { + flags |= KVM_MEM_LOG_DIRTY_PAGES; + } + if (readonly && kvm_readonly_mem_allowed) { + flags |= KVM_MEM_READONLY; + } + return flags; +} + +static int kvm_slot_update_flags(KVMMemoryListener *kml, KVMSlot *mem, + MemoryRegion *mr) +{ + int old_flags; + + old_flags = mem->flags; + mem->flags = kvm_mem_flags(mr); + + /* If nothing changed effectively, no need to issue ioctl */ + if (mem->flags == old_flags) { + return 0; + } + + return kvm_set_user_memory_region(kml, mem); +} + +static int kvm_section_update_flags(KVMMemoryListener *kml, + MemoryRegionSection *section) +{ + hwaddr phys_addr = section->offset_within_address_space; + ram_addr_t size = int128_get64(section->size); + KVMSlot *mem = kvm_lookup_matching_slot(kml, phys_addr, phys_addr + size); + + if (mem == NULL) { + return 0; + } else { + return kvm_slot_update_flags(kml, mem, section->mr); + } +} + +static void kvm_log_start(MemoryListener *listener, + MemoryRegionSection *section, + int old, int new) +{ + KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener); + int r; + + if (old != 0) { + return; + } + + r = kvm_section_update_flags(kml, section); + if (r < 0) { + abort(); + } +} + +static void kvm_log_stop(MemoryListener *listener, + MemoryRegionSection *section, + int old, int new) +{ + KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener); + int r; + + if (new != 0) { + return; + } + + r = kvm_section_update_flags(kml, section); + if (r < 0) { + abort(); + } +} + +/* get kvm's dirty pages bitmap and update qemu's */ +static int kvm_get_dirty_pages_log_range(MemoryRegionSection *section, + unsigned long *bitmap) +{ + ram_addr_t start = section->offset_within_region + + memory_region_get_ram_addr(section->mr); + ram_addr_t pages = int128_get64(section->size) / getpagesize(); + + cpu_physical_memory_set_dirty_lebitmap(bitmap, start, pages); + return 0; +} + +#define ALIGN(x, y) (((x)+(y)-1) & ~((y)-1)) + +/** + * kvm_physical_sync_dirty_bitmap - Grab dirty bitmap from kernel space + * This function updates qemu's dirty bitmap using + * memory_region_set_dirty(). This means all bits are set + * to dirty. + * + * @start_add: start of logged region. + * @end_addr: end of logged region. + */ +static int kvm_physical_sync_dirty_bitmap(KVMMemoryListener *kml, + MemoryRegionSection *section) +{ + KVMState *s = kvm_state; + unsigned long size, allocated_size = 0; + struct kvm_dirty_log d = {}; + KVMSlot *mem; + int ret = 0; + hwaddr start_addr = section->offset_within_address_space; + hwaddr end_addr = start_addr + int128_get64(section->size); + + d.dirty_bitmap = NULL; + while (start_addr < end_addr) { + mem = kvm_lookup_overlapping_slot(kml, start_addr, end_addr); + if (mem == NULL) { + break; + } + + /* XXX bad kernel interface alert + * For dirty bitmap, kernel allocates array of size aligned to + * bits-per-long. But for case when the kernel is 64bits and + * the userspace is 32bits, userspace can't align to the same + * bits-per-long, since sizeof(long) is different between kernel + * and user space. This way, userspace will provide buffer which + * may be 4 bytes less than the kernel will use, resulting in + * userspace memory corruption (which is not detectable by valgrind + * too, in most cases). + * So for now, let's align to 64 instead of HOST_LONG_BITS here, in + * a hope that sizeof(long) won't become >8 any time soon. + */ + size = ALIGN(((mem->memory_size) >> TARGET_PAGE_BITS), + /*HOST_LONG_BITS*/ 64) / 8; + if (!d.dirty_bitmap) { + d.dirty_bitmap = g_malloc(size); + } else if (size > allocated_size) { + d.dirty_bitmap = g_realloc(d.dirty_bitmap, size); + } + allocated_size = size; + memset(d.dirty_bitmap, 0, allocated_size); + + d.slot = mem->slot | (kml->as_id << 16); + if (kvm_vm_ioctl(s, KVM_GET_DIRTY_LOG, &d) == -1) { + DPRINTF("ioctl failed %d\n", errno); + ret = -1; + break; + } + + kvm_get_dirty_pages_log_range(section, d.dirty_bitmap); + start_addr = mem->start_addr + mem->memory_size; + } + g_free(d.dirty_bitmap); + + return ret; +} + +static void kvm_coalesce_mmio_region(MemoryListener *listener, + MemoryRegionSection *secion, + hwaddr start, hwaddr size) +{ + KVMState *s = kvm_state; + + if (s->coalesced_mmio) { + struct kvm_coalesced_mmio_zone zone; + + zone.addr = start; + zone.size = size; + zone.pad = 0; + + (void)kvm_vm_ioctl(s, KVM_REGISTER_COALESCED_MMIO, &zone); + } +} + +static void kvm_uncoalesce_mmio_region(MemoryListener *listener, + MemoryRegionSection *secion, + hwaddr start, hwaddr size) +{ + KVMState *s = kvm_state; + + if (s->coalesced_mmio) { + struct kvm_coalesced_mmio_zone zone; + + zone.addr = start; + zone.size = size; + zone.pad = 0; + + (void)kvm_vm_ioctl(s, KVM_UNREGISTER_COALESCED_MMIO, &zone); + } +} + +int kvm_check_extension(KVMState *s, unsigned int extension) +{ + int ret; + + ret = kvm_ioctl(s, KVM_CHECK_EXTENSION, extension); + if (ret < 0) { + ret = 0; + } + + return ret; +} + +int kvm_vm_check_extension(KVMState *s, unsigned int extension) +{ + int ret; + + ret = kvm_vm_ioctl(s, KVM_CHECK_EXTENSION, extension); + if (ret < 0) { + /* VM wide version not implemented, use global one instead */ + ret = kvm_check_extension(s, extension); + } + + return ret; +} + +static uint32_t adjust_ioeventfd_endianness(uint32_t val, uint32_t size) +{ +#if defined(HOST_WORDS_BIGENDIAN) != defined(TARGET_WORDS_BIGENDIAN) + /* The kernel expects ioeventfd values in HOST_WORDS_BIGENDIAN + * endianness, but the memory core hands them in target endianness. + * For example, PPC is always treated as big-endian even if running + * on KVM and on PPC64LE. Correct here. + */ + switch (size) { + case 2: + val = bswap16(val); + break; + case 4: + val = bswap32(val); + break; + } +#endif + return val; +} + +static int kvm_set_ioeventfd_mmio(int fd, hwaddr addr, uint32_t val, + bool assign, uint32_t size, bool datamatch) +{ + int ret; + struct kvm_ioeventfd iofd = { + .datamatch = datamatch ? adjust_ioeventfd_endianness(val, size) : 0, + .addr = addr, + .len = size, + .flags = 0, + .fd = fd, + }; + + if (!kvm_enabled()) { + return -ENOSYS; + } + + if (datamatch) { + iofd.flags |= KVM_IOEVENTFD_FLAG_DATAMATCH; + } + if (!assign) { + iofd.flags |= KVM_IOEVENTFD_FLAG_DEASSIGN; + } + + ret = kvm_vm_ioctl(kvm_state, KVM_IOEVENTFD, &iofd); + + if (ret < 0) { + return -errno; + } + + return 0; +} + +static int kvm_set_ioeventfd_pio(int fd, uint16_t addr, uint16_t val, + bool assign, uint32_t size, bool datamatch) +{ + struct kvm_ioeventfd kick = { + .datamatch = datamatch ? adjust_ioeventfd_endianness(val, size) : 0, + .addr = addr, + .flags = KVM_IOEVENTFD_FLAG_PIO, + .len = size, + .fd = fd, + }; + int r; + if (!kvm_enabled()) { + return -ENOSYS; + } + if (datamatch) { + kick.flags |= KVM_IOEVENTFD_FLAG_DATAMATCH; + } + if (!assign) { + kick.flags |= KVM_IOEVENTFD_FLAG_DEASSIGN; + } + r = kvm_vm_ioctl(kvm_state, KVM_IOEVENTFD, &kick); + if (r < 0) { + return r; + } + return 0; +} + + +static int kvm_check_many_ioeventfds(void) +{ + /* Userspace can use ioeventfd for io notification. This requires a host + * that supports eventfd(2) and an I/O thread; since eventfd does not + * support SIGIO it cannot interrupt the vcpu. + * + * Older kernels have a 6 device limit on the KVM io bus. Find out so we + * can avoid creating too many ioeventfds. + */ +#if defined(CONFIG_EVENTFD) + int ioeventfds[7]; + int i, ret = 0; + for (i = 0; i < ARRAY_SIZE(ioeventfds); i++) { + ioeventfds[i] = eventfd(0, EFD_CLOEXEC); + if (ioeventfds[i] < 0) { + break; + } + ret = kvm_set_ioeventfd_pio(ioeventfds[i], 0, i, true, 2, true); + if (ret < 0) { + close(ioeventfds[i]); + break; + } + } + + /* Decide whether many devices are supported or not */ + ret = i == ARRAY_SIZE(ioeventfds); + + while (i-- > 0) { + kvm_set_ioeventfd_pio(ioeventfds[i], 0, i, false, 2, true); + close(ioeventfds[i]); + } + return ret; +#else + return 0; +#endif +} + +static const KVMCapabilityInfo * +kvm_check_extension_list(KVMState *s, const KVMCapabilityInfo *list) +{ + while (list->name) { + if (!kvm_check_extension(s, list->value)) { + return list; + } + list++; + } + return NULL; +} + +static void kvm_set_phys_mem(KVMMemoryListener *kml, + MemoryRegionSection *section, bool add) +{ + KVMState *s = kvm_state; + KVMSlot *mem, old; + int err; + MemoryRegion *mr = section->mr; + bool writeable = !mr->readonly && !mr->rom_device; + hwaddr start_addr = section->offset_within_address_space; + ram_addr_t size = int128_get64(section->size); + void *ram = NULL; + unsigned delta; + + /* kvm works in page size chunks, but the function may be called + with sub-page size and unaligned start address. Pad the start + address to next and truncate size to previous page boundary. */ + delta = qemu_real_host_page_size - (start_addr & ~qemu_real_host_page_mask); + delta &= ~qemu_real_host_page_mask; + if (delta > size) { + return; + } + start_addr += delta; + size -= delta; + size &= qemu_real_host_page_mask; + if (!size || (start_addr & ~qemu_real_host_page_mask)) { + return; + } + + if (!memory_region_is_ram(mr)) { + if (writeable || !kvm_readonly_mem_allowed) { + return; + } else if (!mr->romd_mode) { + /* If the memory device is not in romd_mode, then we actually want + * to remove the kvm memory slot so all accesses will trap. */ + add = false; + } + } + + ram = memory_region_get_ram_ptr(mr) + section->offset_within_region + delta; + + while (1) { + mem = kvm_lookup_overlapping_slot(kml, start_addr, start_addr + size); + if (!mem) { + break; + } + + if (add && start_addr >= mem->start_addr && + (start_addr + size <= mem->start_addr + mem->memory_size) && + (ram - start_addr == mem->ram - mem->start_addr)) { + /* The new slot fits into the existing one and comes with + * identical parameters - update flags and done. */ + kvm_slot_update_flags(kml, mem, mr); + return; + } + + old = *mem; + + if (mem->flags & KVM_MEM_LOG_DIRTY_PAGES) { + kvm_physical_sync_dirty_bitmap(kml, section); + } + + /* unregister the overlapping slot */ + mem->memory_size = 0; + err = kvm_set_user_memory_region(kml, mem); + if (err) { + fprintf(stderr, "%s: error unregistering overlapping slot: %s\n", + __func__, strerror(-err)); + abort(); + } + + /* Workaround for older KVM versions: we can't join slots, even not by + * unregistering the previous ones and then registering the larger + * slot. We have to maintain the existing fragmentation. Sigh. + * + * This workaround assumes that the new slot starts at the same + * address as the first existing one. If not or if some overlapping + * slot comes around later, we will fail (not seen in practice so far) + * - and actually require a recent KVM version. */ + if (s->broken_set_mem_region && + old.start_addr == start_addr && old.memory_size < size && add) { + mem = kvm_alloc_slot(kml); + mem->memory_size = old.memory_size; + mem->start_addr = old.start_addr; + mem->ram = old.ram; + mem->flags = kvm_mem_flags(mr); + + err = kvm_set_user_memory_region(kml, mem); + if (err) { + fprintf(stderr, "%s: error updating slot: %s\n", __func__, + strerror(-err)); + abort(); + } + + start_addr += old.memory_size; + ram += old.memory_size; + size -= old.memory_size; + continue; + } + + /* register prefix slot */ + if (old.start_addr < start_addr) { + mem = kvm_alloc_slot(kml); + mem->memory_size = start_addr - old.start_addr; + mem->start_addr = old.start_addr; + mem->ram = old.ram; + mem->flags = kvm_mem_flags(mr); + + err = kvm_set_user_memory_region(kml, mem); + if (err) { + fprintf(stderr, "%s: error registering prefix slot: %s\n", + __func__, strerror(-err)); +#ifdef TARGET_PPC + fprintf(stderr, "%s: This is probably because your kernel's " \ + "PAGE_SIZE is too big. Please try to use 4k " \ + "PAGE_SIZE!\n", __func__); +#endif + abort(); + } + } + + /* register suffix slot */ + if (old.start_addr + old.memory_size > start_addr + size) { + ram_addr_t size_delta; + + mem = kvm_alloc_slot(kml); + mem->start_addr = start_addr + size; + size_delta = mem->start_addr - old.start_addr; + mem->memory_size = old.memory_size - size_delta; + mem->ram = old.ram + size_delta; + mem->flags = kvm_mem_flags(mr); + + err = kvm_set_user_memory_region(kml, mem); + if (err) { + fprintf(stderr, "%s: error registering suffix slot: %s\n", + __func__, strerror(-err)); + abort(); + } + } + } + + /* in case the KVM bug workaround already "consumed" the new slot */ + if (!size) { + return; + } + if (!add) { + return; + } + mem = kvm_alloc_slot(kml); + mem->memory_size = size; + mem->start_addr = start_addr; + mem->ram = ram; + mem->flags = kvm_mem_flags(mr); + + err = kvm_set_user_memory_region(kml, mem); + if (err) { + fprintf(stderr, "%s: error registering slot: %s\n", __func__, + strerror(-err)); + abort(); + } +} + +static void kvm_region_add(MemoryListener *listener, + MemoryRegionSection *section) +{ + KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener); + + memory_region_ref(section->mr); + kvm_set_phys_mem(kml, section, true); +} + +static void kvm_region_del(MemoryListener *listener, + MemoryRegionSection *section) +{ + KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener); + + kvm_set_phys_mem(kml, section, false); + memory_region_unref(section->mr); +} + +static void kvm_log_sync(MemoryListener *listener, + MemoryRegionSection *section) +{ + KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener); + int r; + + r = kvm_physical_sync_dirty_bitmap(kml, section); + if (r < 0) { + abort(); + } +} + +static void kvm_mem_ioeventfd_add(MemoryListener *listener, + MemoryRegionSection *section, + bool match_data, uint64_t data, + EventNotifier *e) +{ + int fd = event_notifier_get_fd(e); + int r; + + r = kvm_set_ioeventfd_mmio(fd, section->offset_within_address_space, + data, true, int128_get64(section->size), + match_data); + if (r < 0) { + fprintf(stderr, "%s: error adding ioeventfd: %s\n", + __func__, strerror(-r)); + abort(); + } +} + +static void kvm_mem_ioeventfd_del(MemoryListener *listener, + MemoryRegionSection *section, + bool match_data, uint64_t data, + EventNotifier *e) +{ + int fd = event_notifier_get_fd(e); + int r; + + r = kvm_set_ioeventfd_mmio(fd, section->offset_within_address_space, + data, false, int128_get64(section->size), + match_data); + if (r < 0) { + abort(); + } +} + +static void kvm_io_ioeventfd_add(MemoryListener *listener, + MemoryRegionSection *section, + bool match_data, uint64_t data, + EventNotifier *e) +{ + int fd = event_notifier_get_fd(e); + int r; + + r = kvm_set_ioeventfd_pio(fd, section->offset_within_address_space, + data, true, int128_get64(section->size), + match_data); + if (r < 0) { + fprintf(stderr, "%s: error adding ioeventfd: %s\n", + __func__, strerror(-r)); + abort(); + } +} + +static void kvm_io_ioeventfd_del(MemoryListener *listener, + MemoryRegionSection *section, + bool match_data, uint64_t data, + EventNotifier *e) + +{ + int fd = event_notifier_get_fd(e); + int r; + + r = kvm_set_ioeventfd_pio(fd, section->offset_within_address_space, + data, false, int128_get64(section->size), + match_data); + if (r < 0) { + abort(); + } +} + +void kvm_memory_listener_register(KVMState *s, KVMMemoryListener *kml, + AddressSpace *as, int as_id) +{ + int i; + + kml->slots = g_malloc0(s->nr_slots * sizeof(KVMSlot)); + kml->as_id = as_id; + + for (i = 0; i < s->nr_slots; i++) { + kml->slots[i].slot = i; + } + + kml->listener.region_add = kvm_region_add; + kml->listener.region_del = kvm_region_del; + kml->listener.log_start = kvm_log_start; + kml->listener.log_stop = kvm_log_stop; + kml->listener.log_sync = kvm_log_sync; + kml->listener.priority = 10; + + memory_listener_register(&kml->listener, as); +} + +static MemoryListener kvm_io_listener = { + .eventfd_add = kvm_io_ioeventfd_add, + .eventfd_del = kvm_io_ioeventfd_del, + .priority = 10, +}; + +static void kvm_handle_interrupt(CPUState *cpu, int mask) +{ + cpu->interrupt_request |= mask; + + if (!qemu_cpu_is_self(cpu)) { + qemu_cpu_kick(cpu); + } +} + +int kvm_set_irq(KVMState *s, int irq, int level) +{ + struct kvm_irq_level event; + int ret; + + assert(kvm_async_interrupts_enabled()); + + event.level = level; + event.irq = irq; + ret = kvm_vm_ioctl(s, s->irq_set_ioctl, &event); + if (ret < 0) { + perror("kvm_set_irq"); + abort(); + } + + return (s->irq_set_ioctl == KVM_IRQ_LINE) ? 1 : event.status; +} + +#ifdef KVM_CAP_IRQ_ROUTING +typedef struct KVMMSIRoute { + struct kvm_irq_routing_entry kroute; + QTAILQ_ENTRY(KVMMSIRoute) entry; +} KVMMSIRoute; + +static void set_gsi(KVMState *s, unsigned int gsi) +{ + set_bit(gsi, s->used_gsi_bitmap); +} + +static void clear_gsi(KVMState *s, unsigned int gsi) +{ + clear_bit(gsi, s->used_gsi_bitmap); +} + +void kvm_init_irq_routing(KVMState *s) +{ + int gsi_count, i; + + gsi_count = kvm_check_extension(s, KVM_CAP_IRQ_ROUTING) - 1; + if (gsi_count > 0) { + /* Round up so we can search ints using ffs */ + s->used_gsi_bitmap = bitmap_new(gsi_count); + s->gsi_count = gsi_count; + } + + s->irq_routes = g_malloc0(sizeof(*s->irq_routes)); + s->nr_allocated_irq_routes = 0; + + if (!kvm_direct_msi_allowed) { + for (i = 0; i < KVM_MSI_HASHTAB_SIZE; i++) { + QTAILQ_INIT(&s->msi_hashtab[i]); + } + } + + kvm_arch_init_irq_routing(s); +} + +void kvm_irqchip_commit_routes(KVMState *s) +{ + int ret; + + if (kvm_gsi_direct_mapping()) { + return; + } + + if (!kvm_gsi_routing_enabled()) { + return; + } + + s->irq_routes->flags = 0; + trace_kvm_irqchip_commit_routes(); + ret = kvm_vm_ioctl(s, KVM_SET_GSI_ROUTING, s->irq_routes); + assert(ret == 0); +} + +static void kvm_add_routing_entry(KVMState *s, + struct kvm_irq_routing_entry *entry) +{ + struct kvm_irq_routing_entry *new; + int n, size; + + if (s->irq_routes->nr == s->nr_allocated_irq_routes) { + n = s->nr_allocated_irq_routes * 2; + if (n < 64) { + n = 64; + } + size = sizeof(struct kvm_irq_routing); + size += n * sizeof(*new); + s->irq_routes = g_realloc(s->irq_routes, size); + s->nr_allocated_irq_routes = n; + } + n = s->irq_routes->nr++; + new = &s->irq_routes->entries[n]; + + *new = *entry; + + set_gsi(s, entry->gsi); +} + +static int kvm_update_routing_entry(KVMState *s, + struct kvm_irq_routing_entry *new_entry) +{ + struct kvm_irq_routing_entry *entry; + int n; + + for (n = 0; n < s->irq_routes->nr; n++) { + entry = &s->irq_routes->entries[n]; + if (entry->gsi != new_entry->gsi) { + continue; + } + + if(!memcmp(entry, new_entry, sizeof *entry)) { + return 0; + } + + *entry = *new_entry; + + return 0; + } + + return -ESRCH; +} + +void kvm_irqchip_add_irq_route(KVMState *s, int irq, int irqchip, int pin) +{ + struct kvm_irq_routing_entry e = {}; + + assert(pin < s->gsi_count); + + e.gsi = irq; + e.type = KVM_IRQ_ROUTING_IRQCHIP; + e.flags = 0; + e.u.irqchip.irqchip = irqchip; + e.u.irqchip.pin = pin; + kvm_add_routing_entry(s, &e); +} + +void kvm_irqchip_release_virq(KVMState *s, int virq) +{ + struct kvm_irq_routing_entry *e; + int i; + + if (kvm_gsi_direct_mapping()) { + return; + } + + for (i = 0; i < s->irq_routes->nr; i++) { + e = &s->irq_routes->entries[i]; + if (e->gsi == virq) { + s->irq_routes->nr--; + *e = s->irq_routes->entries[s->irq_routes->nr]; + } + } + clear_gsi(s, virq); + kvm_arch_release_virq_post(virq); + trace_kvm_irqchip_release_virq(virq); +} + +static unsigned int kvm_hash_msi(uint32_t data) +{ + /* This is optimized for IA32 MSI layout. However, no other arch shall + * repeat the mistake of not providing a direct MSI injection API. */ + return data & 0xff; +} + +static void kvm_flush_dynamic_msi_routes(KVMState *s) +{ + KVMMSIRoute *route, *next; + unsigned int hash; + + for (hash = 0; hash < KVM_MSI_HASHTAB_SIZE; hash++) { + QTAILQ_FOREACH_SAFE(route, &s->msi_hashtab[hash], entry, next) { + kvm_irqchip_release_virq(s, route->kroute.gsi); + QTAILQ_REMOVE(&s->msi_hashtab[hash], route, entry); + g_free(route); + } + } +} + +static int kvm_irqchip_get_virq(KVMState *s) +{ + int next_virq; + + /* + * PIC and IOAPIC share the first 16 GSI numbers, thus the available + * GSI numbers are more than the number of IRQ route. Allocating a GSI + * number can succeed even though a new route entry cannot be added. + * When this happens, flush dynamic MSI entries to free IRQ route entries. + */ + if (!kvm_direct_msi_allowed && s->irq_routes->nr == s->gsi_count) { + kvm_flush_dynamic_msi_routes(s); + } + + /* Return the lowest unused GSI in the bitmap */ + next_virq = find_first_zero_bit(s->used_gsi_bitmap, s->gsi_count); + if (next_virq >= s->gsi_count) { + return -ENOSPC; + } else { + return next_virq; + } +} + +static KVMMSIRoute *kvm_lookup_msi_route(KVMState *s, MSIMessage msg) +{ + unsigned int hash = kvm_hash_msi(msg.data); + KVMMSIRoute *route; + + QTAILQ_FOREACH(route, &s->msi_hashtab[hash], entry) { + if (route->kroute.u.msi.address_lo == (uint32_t)msg.address && + route->kroute.u.msi.address_hi == (msg.address >> 32) && + route->kroute.u.msi.data == le32_to_cpu(msg.data)) { + return route; + } + } + return NULL; +} + +int kvm_irqchip_send_msi(KVMState *s, MSIMessage msg) +{ + struct kvm_msi msi; + KVMMSIRoute *route; + + if (kvm_direct_msi_allowed) { + msi.address_lo = (uint32_t)msg.address; + msi.address_hi = msg.address >> 32; + msi.data = le32_to_cpu(msg.data); + msi.flags = 0; + memset(msi.pad, 0, sizeof(msi.pad)); + + return kvm_vm_ioctl(s, KVM_SIGNAL_MSI, &msi); + } + + route = kvm_lookup_msi_route(s, msg); + if (!route) { + int virq; + + virq = kvm_irqchip_get_virq(s); + if (virq < 0) { + return virq; + } + + route = g_malloc0(sizeof(KVMMSIRoute)); + route->kroute.gsi = virq; + route->kroute.type = KVM_IRQ_ROUTING_MSI; + route->kroute.flags = 0; + route->kroute.u.msi.address_lo = (uint32_t)msg.address; + route->kroute.u.msi.address_hi = msg.address >> 32; + route->kroute.u.msi.data = le32_to_cpu(msg.data); + + kvm_add_routing_entry(s, &route->kroute); + kvm_irqchip_commit_routes(s); + + QTAILQ_INSERT_TAIL(&s->msi_hashtab[kvm_hash_msi(msg.data)], route, + entry); + } + + assert(route->kroute.type == KVM_IRQ_ROUTING_MSI); + + return kvm_set_irq(s, route->kroute.gsi, 1); +} + +int kvm_irqchip_add_msi_route(KVMState *s, int vector, PCIDevice *dev) +{ + struct kvm_irq_routing_entry kroute = {}; + int virq; + MSIMessage msg = {0, 0}; + + if (dev) { + msg = pci_get_msi_message(dev, vector); + } + + if (kvm_gsi_direct_mapping()) { + return kvm_arch_msi_data_to_gsi(msg.data); + } + + if (!kvm_gsi_routing_enabled()) { + return -ENOSYS; + } + + virq = kvm_irqchip_get_virq(s); + if (virq < 0) { + return virq; + } + + kroute.gsi = virq; + kroute.type = KVM_IRQ_ROUTING_MSI; + kroute.flags = 0; + kroute.u.msi.address_lo = (uint32_t)msg.address; + kroute.u.msi.address_hi = msg.address >> 32; + kroute.u.msi.data = le32_to_cpu(msg.data); + if (kvm_msi_devid_required()) { + kroute.flags = KVM_MSI_VALID_DEVID; + kroute.u.msi.devid = pci_requester_id(dev); + } + if (kvm_arch_fixup_msi_route(&kroute, msg.address, msg.data, dev)) { + kvm_irqchip_release_virq(s, virq); + return -EINVAL; + } + + trace_kvm_irqchip_add_msi_route(dev ? dev->name : (char *)"N/A", + vector, virq); + + kvm_add_routing_entry(s, &kroute); + kvm_arch_add_msi_route_post(&kroute, vector, dev); + kvm_irqchip_commit_routes(s); + + return virq; +} + +int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg, + PCIDevice *dev) +{ + struct kvm_irq_routing_entry kroute = {}; + + if (kvm_gsi_direct_mapping()) { + return 0; + } + + if (!kvm_irqchip_in_kernel()) { + return -ENOSYS; + } + + kroute.gsi = virq; + kroute.type = KVM_IRQ_ROUTING_MSI; + kroute.flags = 0; + kroute.u.msi.address_lo = (uint32_t)msg.address; + kroute.u.msi.address_hi = msg.address >> 32; + kroute.u.msi.data = le32_to_cpu(msg.data); + if (kvm_msi_devid_required()) { + kroute.flags = KVM_MSI_VALID_DEVID; + kroute.u.msi.devid = pci_requester_id(dev); + } + if (kvm_arch_fixup_msi_route(&kroute, msg.address, msg.data, dev)) { + return -EINVAL; + } + + trace_kvm_irqchip_update_msi_route(virq); + + return kvm_update_routing_entry(s, &kroute); +} + +static int kvm_irqchip_assign_irqfd(KVMState *s, int fd, int rfd, int virq, + bool assign) +{ + struct kvm_irqfd irqfd = { + .fd = fd, + .gsi = virq, + .flags = assign ? 0 : KVM_IRQFD_FLAG_DEASSIGN, + }; + + if (rfd != -1) { + irqfd.flags |= KVM_IRQFD_FLAG_RESAMPLE; + irqfd.resamplefd = rfd; + } + + if (!kvm_irqfds_enabled()) { + return -ENOSYS; + } + + return kvm_vm_ioctl(s, KVM_IRQFD, &irqfd); +} + +int kvm_irqchip_add_adapter_route(KVMState *s, AdapterInfo *adapter) +{ + struct kvm_irq_routing_entry kroute = {}; + int virq; + + if (!kvm_gsi_routing_enabled()) { + return -ENOSYS; + } + + virq = kvm_irqchip_get_virq(s); + if (virq < 0) { + return virq; + } + + kroute.gsi = virq; + kroute.type = KVM_IRQ_ROUTING_S390_ADAPTER; + kroute.flags = 0; + kroute.u.adapter.summary_addr = adapter->summary_addr; + kroute.u.adapter.ind_addr = adapter->ind_addr; + kroute.u.adapter.summary_offset = adapter->summary_offset; + kroute.u.adapter.ind_offset = adapter->ind_offset; + kroute.u.adapter.adapter_id = adapter->adapter_id; + + kvm_add_routing_entry(s, &kroute); + + return virq; +} + +int kvm_irqchip_add_hv_sint_route(KVMState *s, uint32_t vcpu, uint32_t sint) +{ + struct kvm_irq_routing_entry kroute = {}; + int virq; + + if (!kvm_gsi_routing_enabled()) { + return -ENOSYS; + } + if (!kvm_check_extension(s, KVM_CAP_HYPERV_SYNIC)) { + return -ENOSYS; + } + virq = kvm_irqchip_get_virq(s); + if (virq < 0) { + return virq; + } + + kroute.gsi = virq; + kroute.type = KVM_IRQ_ROUTING_HV_SINT; + kroute.flags = 0; + kroute.u.hv_sint.vcpu = vcpu; + kroute.u.hv_sint.sint = sint; + + kvm_add_routing_entry(s, &kroute); + kvm_irqchip_commit_routes(s); + + return virq; +} + +#else /* !KVM_CAP_IRQ_ROUTING */ + +void kvm_init_irq_routing(KVMState *s) +{ +} + +void kvm_irqchip_release_virq(KVMState *s, int virq) +{ +} + +int kvm_irqchip_send_msi(KVMState *s, MSIMessage msg) +{ + abort(); +} + +int kvm_irqchip_add_msi_route(KVMState *s, int vector, PCIDevice *dev) +{ + return -ENOSYS; +} + +int kvm_irqchip_add_adapter_route(KVMState *s, AdapterInfo *adapter) +{ + return -ENOSYS; +} + +int kvm_irqchip_add_hv_sint_route(KVMState *s, uint32_t vcpu, uint32_t sint) +{ + return -ENOSYS; +} + +static int kvm_irqchip_assign_irqfd(KVMState *s, int fd, int virq, bool assign) +{ + abort(); +} + +int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg) +{ + return -ENOSYS; +} +#endif /* !KVM_CAP_IRQ_ROUTING */ + +int kvm_irqchip_add_irqfd_notifier_gsi(KVMState *s, EventNotifier *n, + EventNotifier *rn, int virq) +{ + return kvm_irqchip_assign_irqfd(s, event_notifier_get_fd(n), + rn ? event_notifier_get_fd(rn) : -1, virq, true); +} + +int kvm_irqchip_remove_irqfd_notifier_gsi(KVMState *s, EventNotifier *n, + int virq) +{ + return kvm_irqchip_assign_irqfd(s, event_notifier_get_fd(n), -1, virq, + false); +} + +int kvm_irqchip_add_irqfd_notifier(KVMState *s, EventNotifier *n, + EventNotifier *rn, qemu_irq irq) +{ + gpointer key, gsi; + gboolean found = g_hash_table_lookup_extended(s->gsimap, irq, &key, &gsi); + + if (!found) { + return -ENXIO; + } + return kvm_irqchip_add_irqfd_notifier_gsi(s, n, rn, GPOINTER_TO_INT(gsi)); +} + +int kvm_irqchip_remove_irqfd_notifier(KVMState *s, EventNotifier *n, + qemu_irq irq) +{ + gpointer key, gsi; + gboolean found = g_hash_table_lookup_extended(s->gsimap, irq, &key, &gsi); + + if (!found) { + return -ENXIO; + } + return kvm_irqchip_remove_irqfd_notifier_gsi(s, n, GPOINTER_TO_INT(gsi)); +} + +void kvm_irqchip_set_qemuirq_gsi(KVMState *s, qemu_irq irq, int gsi) +{ + g_hash_table_insert(s->gsimap, irq, GINT_TO_POINTER(gsi)); +} + +static void kvm_irqchip_create(MachineState *machine, KVMState *s) +{ + int ret; + + if (kvm_check_extension(s, KVM_CAP_IRQCHIP)) { + ; + } else if (kvm_check_extension(s, KVM_CAP_S390_IRQCHIP)) { + ret = kvm_vm_enable_cap(s, KVM_CAP_S390_IRQCHIP, 0); + if (ret < 0) { + fprintf(stderr, "Enable kernel irqchip failed: %s\n", strerror(-ret)); + exit(1); + } + } else { + return; + } + + /* First probe and see if there's a arch-specific hook to create the + * in-kernel irqchip for us */ + ret = kvm_arch_irqchip_create(machine, s); + if (ret == 0) { + if (machine_kernel_irqchip_split(machine)) { + perror("Split IRQ chip mode not supported."); + exit(1); + } else { + ret = kvm_vm_ioctl(s, KVM_CREATE_IRQCHIP); + } + } + if (ret < 0) { + fprintf(stderr, "Create kernel irqchip failed: %s\n", strerror(-ret)); + exit(1); + } + + kvm_kernel_irqchip = true; + /* If we have an in-kernel IRQ chip then we must have asynchronous + * interrupt delivery (though the reverse is not necessarily true) + */ + kvm_async_interrupts_allowed = true; + kvm_halt_in_kernel_allowed = true; + + kvm_init_irq_routing(s); + + s->gsimap = g_hash_table_new(g_direct_hash, g_direct_equal); +} + +/* Find number of supported CPUs using the recommended + * procedure from the kernel API documentation to cope with + * older kernels that may be missing capabilities. + */ +static int kvm_recommended_vcpus(KVMState *s) +{ + int ret = kvm_check_extension(s, KVM_CAP_NR_VCPUS); + return (ret) ? ret : 4; +} + +static int kvm_max_vcpus(KVMState *s) +{ + int ret = kvm_check_extension(s, KVM_CAP_MAX_VCPUS); + return (ret) ? ret : kvm_recommended_vcpus(s); +} + +static int kvm_max_vcpu_id(KVMState *s) +{ + int ret = kvm_check_extension(s, KVM_CAP_MAX_VCPU_ID); + return (ret) ? ret : kvm_max_vcpus(s); +} + +bool kvm_vcpu_id_is_valid(int vcpu_id) +{ + KVMState *s = KVM_STATE(current_machine->accelerator); + return vcpu_id >= 0 && vcpu_id < kvm_max_vcpu_id(s); +} + +static int kvm_init(MachineState *ms) +{ + MachineClass *mc = MACHINE_GET_CLASS(ms); + static const char upgrade_note[] = + "Please upgrade to at least kernel 2.6.29 or recent kvm-kmod\n" + "(see http://sourceforge.net/projects/kvm).\n"; + struct { + const char *name; + int num; + } num_cpus[] = { + { "SMP", smp_cpus }, + { "hotpluggable", max_cpus }, + { NULL, } + }, *nc = num_cpus; + int soft_vcpus_limit, hard_vcpus_limit; + KVMState *s; + const KVMCapabilityInfo *missing_cap; + int ret; + int type = 0; + const char *kvm_type; + + s = KVM_STATE(ms->accelerator); + + /* + * On systems where the kernel can support different base page + * sizes, host page size may be different from TARGET_PAGE_SIZE, + * even with KVM. TARGET_PAGE_SIZE is assumed to be the minimum + * page size for the system though. + */ + assert(TARGET_PAGE_SIZE <= getpagesize()); + + s->sigmask_len = 8; + +#ifdef KVM_CAP_SET_GUEST_DEBUG + QTAILQ_INIT(&s->kvm_sw_breakpoints); +#endif + QLIST_INIT(&s->kvm_parked_vcpus); + s->vmfd = -1; + s->fd = qemu_open("/dev/kvm", O_RDWR); + if (s->fd == -1) { + fprintf(stderr, "Could not access KVM kernel module: %m\n"); + ret = -errno; + goto err; + } + + ret = kvm_ioctl(s, KVM_GET_API_VERSION, 0); + if (ret < KVM_API_VERSION) { + if (ret >= 0) { + ret = -EINVAL; + } + fprintf(stderr, "kvm version too old\n"); + goto err; + } + + if (ret > KVM_API_VERSION) { + ret = -EINVAL; + fprintf(stderr, "kvm version not supported\n"); + goto err; + } + + kvm_immediate_exit = kvm_check_extension(s, KVM_CAP_IMMEDIATE_EXIT); + s->nr_slots = kvm_check_extension(s, KVM_CAP_NR_MEMSLOTS); + + /* If unspecified, use the default value */ + if (!s->nr_slots) { + s->nr_slots = 32; + } + + /* check the vcpu limits */ + soft_vcpus_limit = kvm_recommended_vcpus(s); + hard_vcpus_limit = kvm_max_vcpus(s); + + while (nc->name) { + if (nc->num > soft_vcpus_limit) { + fprintf(stderr, + "Warning: Number of %s cpus requested (%d) exceeds " + "the recommended cpus supported by KVM (%d)\n", + nc->name, nc->num, soft_vcpus_limit); + + if (nc->num > hard_vcpus_limit) { + fprintf(stderr, "Number of %s cpus requested (%d) exceeds " + "the maximum cpus supported by KVM (%d)\n", + nc->name, nc->num, hard_vcpus_limit); + exit(1); + } + } + nc++; + } + + kvm_type = qemu_opt_get(qemu_get_machine_opts(), "kvm-type"); + if (mc->kvm_type) { + type = mc->kvm_type(kvm_type); + } else if (kvm_type) { + ret = -EINVAL; + fprintf(stderr, "Invalid argument kvm-type=%s\n", kvm_type); + goto err; + } + + do { + ret = kvm_ioctl(s, KVM_CREATE_VM, type); + } while (ret == -EINTR); + + if (ret < 0) { + fprintf(stderr, "ioctl(KVM_CREATE_VM) failed: %d %s\n", -ret, + strerror(-ret)); + +#ifdef TARGET_S390X + if (ret == -EINVAL) { + fprintf(stderr, + "Host kernel setup problem detected. Please verify:\n"); + fprintf(stderr, "- for kernels supporting the switch_amode or" + " user_mode parameters, whether\n"); + fprintf(stderr, + " user space is running in primary address space\n"); + fprintf(stderr, + "- for kernels supporting the vm.allocate_pgste sysctl, " + "whether it is enabled\n"); + } +#endif + goto err; + } + + s->vmfd = ret; + missing_cap = kvm_check_extension_list(s, kvm_required_capabilites); + if (!missing_cap) { + missing_cap = + kvm_check_extension_list(s, kvm_arch_required_capabilities); + } + if (missing_cap) { + ret = -EINVAL; + fprintf(stderr, "kvm does not support %s\n%s", + missing_cap->name, upgrade_note); + goto err; + } + + s->coalesced_mmio = kvm_check_extension(s, KVM_CAP_COALESCED_MMIO); + + s->broken_set_mem_region = 1; + ret = kvm_check_extension(s, KVM_CAP_JOIN_MEMORY_REGIONS_WORKS); + if (ret > 0) { + s->broken_set_mem_region = 0; + } + +#ifdef KVM_CAP_VCPU_EVENTS + s->vcpu_events = kvm_check_extension(s, KVM_CAP_VCPU_EVENTS); +#endif + + s->robust_singlestep = + kvm_check_extension(s, KVM_CAP_X86_ROBUST_SINGLESTEP); + +#ifdef KVM_CAP_DEBUGREGS + s->debugregs = kvm_check_extension(s, KVM_CAP_DEBUGREGS); +#endif + +#ifdef KVM_CAP_IRQ_ROUTING + kvm_direct_msi_allowed = (kvm_check_extension(s, KVM_CAP_SIGNAL_MSI) > 0); +#endif + + s->intx_set_mask = kvm_check_extension(s, KVM_CAP_PCI_2_3); + + s->irq_set_ioctl = KVM_IRQ_LINE; + if (kvm_check_extension(s, KVM_CAP_IRQ_INJECT_STATUS)) { + s->irq_set_ioctl = KVM_IRQ_LINE_STATUS; + } + +#ifdef KVM_CAP_READONLY_MEM + kvm_readonly_mem_allowed = + (kvm_check_extension(s, KVM_CAP_READONLY_MEM) > 0); +#endif + + kvm_eventfds_allowed = + (kvm_check_extension(s, KVM_CAP_IOEVENTFD) > 0); + + kvm_irqfds_allowed = + (kvm_check_extension(s, KVM_CAP_IRQFD) > 0); + + kvm_resamplefds_allowed = + (kvm_check_extension(s, KVM_CAP_IRQFD_RESAMPLE) > 0); + + kvm_vm_attributes_allowed = + (kvm_check_extension(s, KVM_CAP_VM_ATTRIBUTES) > 0); + + kvm_ioeventfd_any_length_allowed = + (kvm_check_extension(s, KVM_CAP_IOEVENTFD_ANY_LENGTH) > 0); + + kvm_state = s; + + ret = kvm_arch_init(ms, s); + if (ret < 0) { + goto err; + } + + if (machine_kernel_irqchip_allowed(ms)) { + kvm_irqchip_create(ms, s); + } + + if (kvm_eventfds_allowed) { + s->memory_listener.listener.eventfd_add = kvm_mem_ioeventfd_add; + s->memory_listener.listener.eventfd_del = kvm_mem_ioeventfd_del; + } + s->memory_listener.listener.coalesced_mmio_add = kvm_coalesce_mmio_region; + s->memory_listener.listener.coalesced_mmio_del = kvm_uncoalesce_mmio_region; + + kvm_memory_listener_register(s, &s->memory_listener, + &address_space_memory, 0); + memory_listener_register(&kvm_io_listener, + &address_space_io); + + s->many_ioeventfds = kvm_check_many_ioeventfds(); + + cpu_interrupt_handler = kvm_handle_interrupt; + + return 0; + +err: + assert(ret < 0); + if (s->vmfd >= 0) { + close(s->vmfd); + } + if (s->fd != -1) { + close(s->fd); + } + g_free(s->memory_listener.slots); + + return ret; +} + +void kvm_set_sigmask_len(KVMState *s, unsigned int sigmask_len) +{ + s->sigmask_len = sigmask_len; +} + +static void kvm_handle_io(uint16_t port, MemTxAttrs attrs, void *data, int direction, + int size, uint32_t count) +{ + int i; + uint8_t *ptr = data; + + for (i = 0; i < count; i++) { + address_space_rw(&address_space_io, port, attrs, + ptr, size, + direction == KVM_EXIT_IO_OUT); + ptr += size; + } +} + +static int kvm_handle_internal_error(CPUState *cpu, struct kvm_run *run) +{ + fprintf(stderr, "KVM internal error. Suberror: %d\n", + run->internal.suberror); + + if (kvm_check_extension(kvm_state, KVM_CAP_INTERNAL_ERROR_DATA)) { + int i; + + for (i = 0; i < run->internal.ndata; ++i) { + fprintf(stderr, "extra data[%d]: %"PRIx64"\n", + i, (uint64_t)run->internal.data[i]); + } + } + if (run->internal.suberror == KVM_INTERNAL_ERROR_EMULATION) { + fprintf(stderr, "emulation failure\n"); + if (!kvm_arch_stop_on_emulation_error(cpu)) { + cpu_dump_state(cpu, stderr, fprintf, CPU_DUMP_CODE); + return EXCP_INTERRUPT; + } + } + /* FIXME: Should trigger a qmp message to let management know + * something went wrong. + */ + return -1; +} + +void kvm_flush_coalesced_mmio_buffer(void) +{ + KVMState *s = kvm_state; + + if (s->coalesced_flush_in_progress) { + return; + } + + s->coalesced_flush_in_progress = true; + + if (s->coalesced_mmio_ring) { + struct kvm_coalesced_mmio_ring *ring = s->coalesced_mmio_ring; + while (ring->first != ring->last) { + struct kvm_coalesced_mmio *ent; + + ent = &ring->coalesced_mmio[ring->first]; + + cpu_physical_memory_write(ent->phys_addr, ent->data, ent->len); + smp_wmb(); + ring->first = (ring->first + 1) % KVM_COALESCED_MMIO_MAX; + } + } + + s->coalesced_flush_in_progress = false; +} + +static void do_kvm_cpu_synchronize_state(CPUState *cpu, run_on_cpu_data arg) +{ + if (!cpu->kvm_vcpu_dirty) { + kvm_arch_get_registers(cpu); + cpu->kvm_vcpu_dirty = true; + } +} + +void kvm_cpu_synchronize_state(CPUState *cpu) +{ + if (!cpu->kvm_vcpu_dirty) { + run_on_cpu(cpu, do_kvm_cpu_synchronize_state, RUN_ON_CPU_NULL); + } +} + +static void do_kvm_cpu_synchronize_post_reset(CPUState *cpu, run_on_cpu_data arg) +{ + kvm_arch_put_registers(cpu, KVM_PUT_RESET_STATE); + cpu->kvm_vcpu_dirty = false; +} + +void kvm_cpu_synchronize_post_reset(CPUState *cpu) +{ + run_on_cpu(cpu, do_kvm_cpu_synchronize_post_reset, RUN_ON_CPU_NULL); +} + +static void do_kvm_cpu_synchronize_post_init(CPUState *cpu, run_on_cpu_data arg) +{ + kvm_arch_put_registers(cpu, KVM_PUT_FULL_STATE); + cpu->kvm_vcpu_dirty = false; +} + +void kvm_cpu_synchronize_post_init(CPUState *cpu) +{ + run_on_cpu(cpu, do_kvm_cpu_synchronize_post_init, RUN_ON_CPU_NULL); +} + +static void do_kvm_cpu_synchronize_pre_loadvm(CPUState *cpu, run_on_cpu_data arg) +{ + cpu->kvm_vcpu_dirty = true; +} + +void kvm_cpu_synchronize_pre_loadvm(CPUState *cpu) +{ + run_on_cpu(cpu, do_kvm_cpu_synchronize_pre_loadvm, RUN_ON_CPU_NULL); +} + +#ifdef KVM_HAVE_MCE_INJECTION +static __thread void *pending_sigbus_addr; +static __thread int pending_sigbus_code; +static __thread bool have_sigbus_pending; +#endif + +static void kvm_cpu_kick(CPUState *cpu) +{ + atomic_set(&cpu->kvm_run->immediate_exit, 1); +} + +static void kvm_cpu_kick_self(void) +{ + if (kvm_immediate_exit) { + kvm_cpu_kick(current_cpu); + } else { + qemu_cpu_kick_self(); + } +} + +static void kvm_eat_signals(CPUState *cpu) +{ + struct timespec ts = { 0, 0 }; + siginfo_t siginfo; + sigset_t waitset; + sigset_t chkset; + int r; + + if (kvm_immediate_exit) { + atomic_set(&cpu->kvm_run->immediate_exit, 0); + /* Write kvm_run->immediate_exit before the cpu->exit_request + * write in kvm_cpu_exec. + */ + smp_wmb(); + return; + } + + sigemptyset(&waitset); + sigaddset(&waitset, SIG_IPI); + + do { + r = sigtimedwait(&waitset, &siginfo, &ts); + if (r == -1 && !(errno == EAGAIN || errno == EINTR)) { + perror("sigtimedwait"); + exit(1); + } + + r = sigpending(&chkset); + if (r == -1) { + perror("sigpending"); + exit(1); + } + } while (sigismember(&chkset, SIG_IPI)); +} + +int kvm_cpu_exec(CPUState *cpu) +{ + struct kvm_run *run = cpu->kvm_run; + int ret, run_ret; + + DPRINTF("kvm_cpu_exec()\n"); + + if (kvm_arch_process_async_events(cpu)) { + atomic_set(&cpu->exit_request, 0); + return EXCP_HLT; + } + + qemu_mutex_unlock_iothread(); + cpu_exec_start(cpu); + + do { + MemTxAttrs attrs; + + if (cpu->kvm_vcpu_dirty) { + kvm_arch_put_registers(cpu, KVM_PUT_RUNTIME_STATE); + cpu->kvm_vcpu_dirty = false; + } + + kvm_arch_pre_run(cpu, run); + if (atomic_read(&cpu->exit_request)) { + DPRINTF("interrupt exit requested\n"); + /* + * KVM requires us to reenter the kernel after IO exits to complete + * instruction emulation. This self-signal will ensure that we + * leave ASAP again. + */ + kvm_cpu_kick_self(); + } + + /* Read cpu->exit_request before KVM_RUN reads run->immediate_exit. + * Matching barrier in kvm_eat_signals. + */ + smp_rmb(); + + run_ret = kvm_vcpu_ioctl(cpu, KVM_RUN, 0); + + attrs = kvm_arch_post_run(cpu, run); + +#ifdef KVM_HAVE_MCE_INJECTION + if (unlikely(have_sigbus_pending)) { + qemu_mutex_lock_iothread(); + kvm_arch_on_sigbus_vcpu(cpu, pending_sigbus_code, + pending_sigbus_addr); + have_sigbus_pending = false; + qemu_mutex_unlock_iothread(); + } +#endif + + if (run_ret < 0) { + if (run_ret == -EINTR || run_ret == -EAGAIN) { + DPRINTF("io window exit\n"); + kvm_eat_signals(cpu); + ret = EXCP_INTERRUPT; + break; + } + fprintf(stderr, "error: kvm run failed %s\n", + strerror(-run_ret)); +#ifdef TARGET_PPC + if (run_ret == -EBUSY) { + fprintf(stderr, + "This is probably because your SMT is enabled.\n" + "VCPU can only run on primary threads with all " + "secondary threads offline.\n"); + } +#endif + ret = -1; + break; + } + + trace_kvm_run_exit(cpu->cpu_index, run->exit_reason); + switch (run->exit_reason) { + case KVM_EXIT_IO: + DPRINTF("handle_io\n"); + /* Called outside BQL */ + kvm_handle_io(run->io.port, attrs, + (uint8_t *)run + run->io.data_offset, + run->io.direction, + run->io.size, + run->io.count); + ret = 0; + break; + case KVM_EXIT_MMIO: + DPRINTF("handle_mmio\n"); + /* Called outside BQL */ + address_space_rw(&address_space_memory, + run->mmio.phys_addr, attrs, + run->mmio.data, + run->mmio.len, + run->mmio.is_write); + ret = 0; + break; + case KVM_EXIT_IRQ_WINDOW_OPEN: + DPRINTF("irq_window_open\n"); + ret = EXCP_INTERRUPT; + break; + case KVM_EXIT_SHUTDOWN: + DPRINTF("shutdown\n"); + qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET); + ret = EXCP_INTERRUPT; + break; + case KVM_EXIT_UNKNOWN: + fprintf(stderr, "KVM: unknown exit, hardware reason %" PRIx64 "\n", + (uint64_t)run->hw.hardware_exit_reason); + ret = -1; + break; + case KVM_EXIT_INTERNAL_ERROR: + ret = kvm_handle_internal_error(cpu, run); + break; + case KVM_EXIT_SYSTEM_EVENT: + switch (run->system_event.type) { + case KVM_SYSTEM_EVENT_SHUTDOWN: + qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN); + ret = EXCP_INTERRUPT; + break; + case KVM_SYSTEM_EVENT_RESET: + qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET); + ret = EXCP_INTERRUPT; + break; + case KVM_SYSTEM_EVENT_CRASH: + kvm_cpu_synchronize_state(cpu); + qemu_mutex_lock_iothread(); + qemu_system_guest_panicked(cpu_get_crash_info(cpu)); + qemu_mutex_unlock_iothread(); + ret = 0; + break; + default: + DPRINTF("kvm_arch_handle_exit\n"); + ret = kvm_arch_handle_exit(cpu, run); + break; + } + break; + default: + DPRINTF("kvm_arch_handle_exit\n"); + ret = kvm_arch_handle_exit(cpu, run); + break; + } + } while (ret == 0); + + cpu_exec_end(cpu); + qemu_mutex_lock_iothread(); + + if (ret < 0) { + cpu_dump_state(cpu, stderr, fprintf, CPU_DUMP_CODE); + vm_stop(RUN_STATE_INTERNAL_ERROR); + } + + atomic_set(&cpu->exit_request, 0); + return ret; +} + +int kvm_ioctl(KVMState *s, int type, ...) +{ + int ret; + void *arg; + va_list ap; + + va_start(ap, type); + arg = va_arg(ap, void *); + va_end(ap); + + trace_kvm_ioctl(type, arg); + ret = ioctl(s->fd, type, arg); + if (ret == -1) { + ret = -errno; + } + return ret; +} + +int kvm_vm_ioctl(KVMState *s, int type, ...) +{ + int ret; + void *arg; + va_list ap; + + va_start(ap, type); + arg = va_arg(ap, void *); + va_end(ap); + + trace_kvm_vm_ioctl(type, arg); + ret = ioctl(s->vmfd, type, arg); + if (ret == -1) { + ret = -errno; + } + return ret; +} + +int kvm_vcpu_ioctl(CPUState *cpu, int type, ...) +{ + int ret; + void *arg; + va_list ap; + + va_start(ap, type); + arg = va_arg(ap, void *); + va_end(ap); + + trace_kvm_vcpu_ioctl(cpu->cpu_index, type, arg); + ret = ioctl(cpu->kvm_fd, type, arg); + if (ret == -1) { + ret = -errno; + } + return ret; +} + +int kvm_device_ioctl(int fd, int type, ...) +{ + int ret; + void *arg; + va_list ap; + + va_start(ap, type); + arg = va_arg(ap, void *); + va_end(ap); + + trace_kvm_device_ioctl(fd, type, arg); + ret = ioctl(fd, type, arg); + if (ret == -1) { + ret = -errno; + } + return ret; +} + +int kvm_vm_check_attr(KVMState *s, uint32_t group, uint64_t attr) +{ + int ret; + struct kvm_device_attr attribute = { + .group = group, + .attr = attr, + }; + + if (!kvm_vm_attributes_allowed) { + return 0; + } + + ret = kvm_vm_ioctl(s, KVM_HAS_DEVICE_ATTR, &attribute); + /* kvm returns 0 on success for HAS_DEVICE_ATTR */ + return ret ? 0 : 1; +} + +int kvm_device_check_attr(int dev_fd, uint32_t group, uint64_t attr) +{ + struct kvm_device_attr attribute = { + .group = group, + .attr = attr, + .flags = 0, + }; + + return kvm_device_ioctl(dev_fd, KVM_HAS_DEVICE_ATTR, &attribute) ? 0 : 1; +} + +int kvm_device_access(int fd, int group, uint64_t attr, + void *val, bool write, Error **errp) +{ + struct kvm_device_attr kvmattr; + int err; + + kvmattr.flags = 0; + kvmattr.group = group; + kvmattr.attr = attr; + kvmattr.addr = (uintptr_t)val; + + err = kvm_device_ioctl(fd, + write ? KVM_SET_DEVICE_ATTR : KVM_GET_DEVICE_ATTR, + &kvmattr); + if (err < 0) { + error_setg_errno(errp, -err, + "KVM_%s_DEVICE_ATTR failed: Group %d " + "attr 0x%016" PRIx64, + write ? "SET" : "GET", group, attr); + } + return err; +} + +/* Return 1 on success, 0 on failure */ +int kvm_has_sync_mmu(void) +{ + return kvm_check_extension(kvm_state, KVM_CAP_SYNC_MMU); +} + +int kvm_has_vcpu_events(void) +{ + return kvm_state->vcpu_events; +} + +int kvm_has_robust_singlestep(void) +{ + return kvm_state->robust_singlestep; +} + +int kvm_has_debugregs(void) +{ + return kvm_state->debugregs; +} + +int kvm_has_many_ioeventfds(void) +{ + if (!kvm_enabled()) { + return 0; + } + return kvm_state->many_ioeventfds; +} + +int kvm_has_gsi_routing(void) +{ +#ifdef KVM_CAP_IRQ_ROUTING + return kvm_check_extension(kvm_state, KVM_CAP_IRQ_ROUTING); +#else + return false; +#endif +} + +int kvm_has_intx_set_mask(void) +{ + return kvm_state->intx_set_mask; +} + +#ifdef KVM_CAP_SET_GUEST_DEBUG +struct kvm_sw_breakpoint *kvm_find_sw_breakpoint(CPUState *cpu, + target_ulong pc) +{ + struct kvm_sw_breakpoint *bp; + + QTAILQ_FOREACH(bp, &cpu->kvm_state->kvm_sw_breakpoints, entry) { + if (bp->pc == pc) { + return bp; + } + } + return NULL; +} + +int kvm_sw_breakpoints_active(CPUState *cpu) +{ + return !QTAILQ_EMPTY(&cpu->kvm_state->kvm_sw_breakpoints); +} + +struct kvm_set_guest_debug_data { + struct kvm_guest_debug dbg; + int err; +}; + +static void kvm_invoke_set_guest_debug(CPUState *cpu, run_on_cpu_data data) +{ + struct kvm_set_guest_debug_data *dbg_data = + (struct kvm_set_guest_debug_data *) data.host_ptr; + + dbg_data->err = kvm_vcpu_ioctl(cpu, KVM_SET_GUEST_DEBUG, + &dbg_data->dbg); +} + +int kvm_update_guest_debug(CPUState *cpu, unsigned long reinject_trap) +{ + struct kvm_set_guest_debug_data data; + + data.dbg.control = reinject_trap; + + if (cpu->singlestep_enabled) { + data.dbg.control |= KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_SINGLESTEP; + } + kvm_arch_update_guest_debug(cpu, &data.dbg); + + run_on_cpu(cpu, kvm_invoke_set_guest_debug, + RUN_ON_CPU_HOST_PTR(&data)); + return data.err; +} + +int kvm_insert_breakpoint(CPUState *cpu, target_ulong addr, + target_ulong len, int type) +{ + struct kvm_sw_breakpoint *bp; + int err; + + if (type == GDB_BREAKPOINT_SW) { + bp = kvm_find_sw_breakpoint(cpu, addr); + if (bp) { + bp->use_count++; + return 0; + } + + bp = g_malloc(sizeof(struct kvm_sw_breakpoint)); + bp->pc = addr; + bp->use_count = 1; + err = kvm_arch_insert_sw_breakpoint(cpu, bp); + if (err) { + g_free(bp); + return err; + } + + QTAILQ_INSERT_HEAD(&cpu->kvm_state->kvm_sw_breakpoints, bp, entry); + } else { + err = kvm_arch_insert_hw_breakpoint(addr, len, type); + if (err) { + return err; + } + } + + CPU_FOREACH(cpu) { + err = kvm_update_guest_debug(cpu, 0); + if (err) { + return err; + } + } + return 0; +} + +int kvm_remove_breakpoint(CPUState *cpu, target_ulong addr, + target_ulong len, int type) +{ + struct kvm_sw_breakpoint *bp; + int err; + + if (type == GDB_BREAKPOINT_SW) { + bp = kvm_find_sw_breakpoint(cpu, addr); + if (!bp) { + return -ENOENT; + } + + if (bp->use_count > 1) { + bp->use_count--; + return 0; + } + + err = kvm_arch_remove_sw_breakpoint(cpu, bp); + if (err) { + return err; + } + + QTAILQ_REMOVE(&cpu->kvm_state->kvm_sw_breakpoints, bp, entry); + g_free(bp); + } else { + err = kvm_arch_remove_hw_breakpoint(addr, len, type); + if (err) { + return err; + } + } + + CPU_FOREACH(cpu) { + err = kvm_update_guest_debug(cpu, 0); + if (err) { + return err; + } + } + return 0; +} + +void kvm_remove_all_breakpoints(CPUState *cpu) +{ + struct kvm_sw_breakpoint *bp, *next; + KVMState *s = cpu->kvm_state; + CPUState *tmpcpu; + + QTAILQ_FOREACH_SAFE(bp, &s->kvm_sw_breakpoints, entry, next) { + if (kvm_arch_remove_sw_breakpoint(cpu, bp) != 0) { + /* Try harder to find a CPU that currently sees the breakpoint. */ + CPU_FOREACH(tmpcpu) { + if (kvm_arch_remove_sw_breakpoint(tmpcpu, bp) == 0) { + break; + } + } + } + QTAILQ_REMOVE(&s->kvm_sw_breakpoints, bp, entry); + g_free(bp); + } + kvm_arch_remove_all_hw_breakpoints(); + + CPU_FOREACH(cpu) { + kvm_update_guest_debug(cpu, 0); + } +} + +#else /* !KVM_CAP_SET_GUEST_DEBUG */ + +int kvm_update_guest_debug(CPUState *cpu, unsigned long reinject_trap) +{ + return -EINVAL; +} + +int kvm_insert_breakpoint(CPUState *cpu, target_ulong addr, + target_ulong len, int type) +{ + return -EINVAL; +} + +int kvm_remove_breakpoint(CPUState *cpu, target_ulong addr, + target_ulong len, int type) +{ + return -EINVAL; +} + +void kvm_remove_all_breakpoints(CPUState *cpu) +{ +} +#endif /* !KVM_CAP_SET_GUEST_DEBUG */ + +static int kvm_set_signal_mask(CPUState *cpu, const sigset_t *sigset) +{ + KVMState *s = kvm_state; + struct kvm_signal_mask *sigmask; + int r; + + sigmask = g_malloc(sizeof(*sigmask) + sizeof(*sigset)); + + sigmask->len = s->sigmask_len; + memcpy(sigmask->sigset, sigset, sizeof(*sigset)); + r = kvm_vcpu_ioctl(cpu, KVM_SET_SIGNAL_MASK, sigmask); + g_free(sigmask); + + return r; +} + +static void kvm_ipi_signal(int sig) +{ + if (current_cpu) { + assert(kvm_immediate_exit); + kvm_cpu_kick(current_cpu); + } +} + +void kvm_init_cpu_signals(CPUState *cpu) +{ + int r; + sigset_t set; + struct sigaction sigact; + + memset(&sigact, 0, sizeof(sigact)); + sigact.sa_handler = kvm_ipi_signal; + sigaction(SIG_IPI, &sigact, NULL); + + pthread_sigmask(SIG_BLOCK, NULL, &set); +#if defined KVM_HAVE_MCE_INJECTION + sigdelset(&set, SIGBUS); + pthread_sigmask(SIG_SETMASK, &set, NULL); +#endif + sigdelset(&set, SIG_IPI); + if (kvm_immediate_exit) { + r = pthread_sigmask(SIG_SETMASK, &set, NULL); + } else { + r = kvm_set_signal_mask(cpu, &set); + } + if (r) { + fprintf(stderr, "kvm_set_signal_mask: %s\n", strerror(-r)); + exit(1); + } +} + +/* Called asynchronously in VCPU thread. */ +int kvm_on_sigbus_vcpu(CPUState *cpu, int code, void *addr) +{ +#ifdef KVM_HAVE_MCE_INJECTION + if (have_sigbus_pending) { + return 1; + } + have_sigbus_pending = true; + pending_sigbus_addr = addr; + pending_sigbus_code = code; + atomic_set(&cpu->exit_request, 1); + return 0; +#else + return 1; +#endif +} + +/* Called synchronously (via signalfd) in main thread. */ +int kvm_on_sigbus(int code, void *addr) +{ +#ifdef KVM_HAVE_MCE_INJECTION + /* Action required MCE kills the process if SIGBUS is blocked. Because + * that's what happens in the I/O thread, where we handle MCE via signalfd, + * we can only get action optional here. + */ + assert(code != BUS_MCEERR_AR); + kvm_arch_on_sigbus_vcpu(first_cpu, code, addr); + return 0; +#else + return 1; +#endif +} + +int kvm_create_device(KVMState *s, uint64_t type, bool test) +{ + int ret; + struct kvm_create_device create_dev; + + create_dev.type = type; + create_dev.fd = -1; + create_dev.flags = test ? KVM_CREATE_DEVICE_TEST : 0; + + if (!kvm_check_extension(s, KVM_CAP_DEVICE_CTRL)) { + return -ENOTSUP; + } + + ret = kvm_vm_ioctl(s, KVM_CREATE_DEVICE, &create_dev); + if (ret) { + return ret; + } + + return test ? 0 : create_dev.fd; +} + +bool kvm_device_supported(int vmfd, uint64_t type) +{ + struct kvm_create_device create_dev = { + .type = type, + .fd = -1, + .flags = KVM_CREATE_DEVICE_TEST, + }; + + if (ioctl(vmfd, KVM_CHECK_EXTENSION, KVM_CAP_DEVICE_CTRL) <= 0) { + return false; + } + + return (ioctl(vmfd, KVM_CREATE_DEVICE, &create_dev) >= 0); +} + +int kvm_set_one_reg(CPUState *cs, uint64_t id, void *source) +{ + struct kvm_one_reg reg; + int r; + + reg.id = id; + reg.addr = (uintptr_t) source; + r = kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, ®); + if (r) { + trace_kvm_failed_reg_set(id, strerror(-r)); + } + return r; +} + +int kvm_get_one_reg(CPUState *cs, uint64_t id, void *target) +{ + struct kvm_one_reg reg; + int r; + + reg.id = id; + reg.addr = (uintptr_t) target; + r = kvm_vcpu_ioctl(cs, KVM_GET_ONE_REG, ®); + if (r) { + trace_kvm_failed_reg_get(id, strerror(-r)); + } + return r; +} + +static void kvm_accel_class_init(ObjectClass *oc, void *data) +{ + AccelClass *ac = ACCEL_CLASS(oc); + ac->name = "KVM"; + ac->init_machine = kvm_init; + ac->allowed = &kvm_allowed; +} + +static const TypeInfo kvm_accel_type = { + .name = TYPE_KVM_ACCEL, + .parent = TYPE_ACCEL, + .class_init = kvm_accel_class_init, + .instance_size = sizeof(KVMState), +}; + +static void kvm_type_init(void) +{ + type_register_static(&kvm_accel_type); +} + +type_init(kvm_type_init); diff --git a/accel/kvm/trace-events b/accel/kvm/trace-events new file mode 100644 index 0000000000..f89ba5578d --- /dev/null +++ b/accel/kvm/trace-events @@ -0,0 +1,15 @@ +# Trace events for debugging and performance instrumentation + +# kvm-all.c +kvm_ioctl(int type, void *arg) "type 0x%x, arg %p" +kvm_vm_ioctl(int type, void *arg) "type 0x%x, arg %p" +kvm_vcpu_ioctl(int cpu_index, int type, void *arg) "cpu_index %d, type 0x%x, arg %p" +kvm_run_exit(int cpu_index, uint32_t reason) "cpu_index %d, reason %d" +kvm_device_ioctl(int fd, int type, void *arg) "dev fd %d, type 0x%x, arg %p" +kvm_failed_reg_get(uint64_t id, const char *msg) "Warning: Unable to retrieve ONEREG %" PRIu64 " from KVM: %s" +kvm_failed_reg_set(uint64_t id, const char *msg) "Warning: Unable to set ONEREG %" PRIu64 " to KVM: %s" +kvm_irqchip_commit_routes(void) "" +kvm_irqchip_add_msi_route(char *name, int vector, int virq) "dev %s vector %d virq %d" +kvm_irqchip_update_msi_route(int virq) "Updating MSI route virq=%d" +kvm_irqchip_release_virq(int virq) "virq %d" + diff --git a/accel/stubs/Makefile.objs b/accel/stubs/Makefile.objs new file mode 100644 index 0000000000..bd5794f222 --- /dev/null +++ b/accel/stubs/Makefile.objs @@ -0,0 +1 @@ +obj-$(call lnot,$(CONFIG_KVM)) += kvm-stub.o diff --git a/accel/stubs/kvm-stub.c b/accel/stubs/kvm-stub.c new file mode 100644 index 0000000000..ef0c7346af --- /dev/null +++ b/accel/stubs/kvm-stub.c @@ -0,0 +1,158 @@ +/* + * QEMU KVM stub + * + * Copyright Red Hat, Inc. 2010 + * + * Author: Paolo Bonzini + * + * This work is licensed under the terms of the GNU GPL, version 2 or later. + * See the COPYING file in the top-level directory. + * + */ + +#include "qemu/osdep.h" +#include "qemu-common.h" +#include "cpu.h" +#include "sysemu/kvm.h" + +#ifndef CONFIG_USER_ONLY +#include "hw/pci/msi.h" +#endif + +KVMState *kvm_state; +bool kvm_kernel_irqchip; +bool kvm_async_interrupts_allowed; +bool kvm_eventfds_allowed; +bool kvm_irqfds_allowed; +bool kvm_resamplefds_allowed; +bool kvm_msi_via_irqfd_allowed; +bool kvm_gsi_routing_allowed; +bool kvm_gsi_direct_mapping; +bool kvm_allowed; +bool kvm_readonly_mem_allowed; +bool kvm_ioeventfd_any_length_allowed; +bool kvm_msi_use_devid; + +int kvm_destroy_vcpu(CPUState *cpu) +{ + return -ENOSYS; +} + +int kvm_init_vcpu(CPUState *cpu) +{ + return -ENOSYS; +} + +void kvm_flush_coalesced_mmio_buffer(void) +{ +} + +void kvm_cpu_synchronize_state(CPUState *cpu) +{ +} + +void kvm_cpu_synchronize_post_reset(CPUState *cpu) +{ +} + +void kvm_cpu_synchronize_post_init(CPUState *cpu) +{ +} + +int kvm_cpu_exec(CPUState *cpu) +{ + abort(); +} + +int kvm_has_sync_mmu(void) +{ + return 0; +} + +int kvm_has_many_ioeventfds(void) +{ + return 0; +} + +int kvm_update_guest_debug(CPUState *cpu, unsigned long reinject_trap) +{ + return -ENOSYS; +} + +int kvm_insert_breakpoint(CPUState *cpu, target_ulong addr, + target_ulong len, int type) +{ + return -EINVAL; +} + +int kvm_remove_breakpoint(CPUState *cpu, target_ulong addr, + target_ulong len, int type) +{ + return -EINVAL; +} + +void kvm_remove_all_breakpoints(CPUState *cpu) +{ +} + +int kvm_on_sigbus_vcpu(CPUState *cpu, int code, void *addr) +{ + return 1; +} + +int kvm_on_sigbus(int code, void *addr) +{ + return 1; +} + +#ifndef CONFIG_USER_ONLY +int kvm_irqchip_add_msi_route(KVMState *s, int vector, PCIDevice *dev) +{ + return -ENOSYS; +} + +void kvm_init_irq_routing(KVMState *s) +{ +} + +void kvm_irqchip_release_virq(KVMState *s, int virq) +{ +} + +int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg, + PCIDevice *dev) +{ + return -ENOSYS; +} + +void kvm_irqchip_commit_routes(KVMState *s) +{ +} + +int kvm_irqchip_add_adapter_route(KVMState *s, AdapterInfo *adapter) +{ + return -ENOSYS; +} + +int kvm_irqchip_add_irqfd_notifier_gsi(KVMState *s, EventNotifier *n, + EventNotifier *rn, int virq) +{ + return -ENOSYS; +} + +int kvm_irqchip_remove_irqfd_notifier_gsi(KVMState *s, EventNotifier *n, + int virq) +{ + return -ENOSYS; +} + +bool kvm_has_free_slot(MachineState *ms) +{ + return false; +} + +void kvm_init_cpu_signals(CPUState *cpu) +{ + abort(); +} +#endif diff --git a/kvm-all.c b/kvm-all.c deleted file mode 100644 index 98ad151375..0000000000 --- a/kvm-all.c +++ /dev/null @@ -1,2633 +0,0 @@ -/* - * QEMU KVM support - * - * Copyright IBM, Corp. 2008 - * Red Hat, Inc. 2008 - * - * Authors: - * Anthony Liguori - * Glauber Costa - * - * This work is licensed under the terms of the GNU GPL, version 2 or later. - * See the COPYING file in the top-level directory. - * - */ - -#include "qemu/osdep.h" -#include - -#include - -#include "qemu-common.h" -#include "qemu/atomic.h" -#include "qemu/option.h" -#include "qemu/config-file.h" -#include "qemu/error-report.h" -#include "qapi/error.h" -#include "hw/hw.h" -#include "hw/pci/msi.h" -#include "hw/pci/msix.h" -#include "hw/s390x/adapter.h" -#include "exec/gdbstub.h" -#include "sysemu/kvm_int.h" -#include "sysemu/cpus.h" -#include "qemu/bswap.h" -#include "exec/memory.h" -#include "exec/ram_addr.h" -#include "exec/address-spaces.h" -#include "qemu/event_notifier.h" -#include "trace-root.h" -#include "hw/irq.h" - -#include "hw/boards.h" - -/* This check must be after config-host.h is included */ -#ifdef CONFIG_EVENTFD -#include -#endif - -/* KVM uses PAGE_SIZE in its definition of KVM_COALESCED_MMIO_MAX. We - * need to use the real host PAGE_SIZE, as that's what KVM will use. - */ -#define PAGE_SIZE getpagesize() - -//#define DEBUG_KVM - -#ifdef DEBUG_KVM -#define DPRINTF(fmt, ...) \ - do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0) -#else -#define DPRINTF(fmt, ...) \ - do { } while (0) -#endif - -#define KVM_MSI_HASHTAB_SIZE 256 - -struct KVMParkedVcpu { - unsigned long vcpu_id; - int kvm_fd; - QLIST_ENTRY(KVMParkedVcpu) node; -}; - -struct KVMState -{ - AccelState parent_obj; - - int nr_slots; - int fd; - int vmfd; - int coalesced_mmio; - struct kvm_coalesced_mmio_ring *coalesced_mmio_ring; - bool coalesced_flush_in_progress; - int broken_set_mem_region; - int vcpu_events; - int robust_singlestep; - int debugregs; -#ifdef KVM_CAP_SET_GUEST_DEBUG - struct kvm_sw_breakpoint_head kvm_sw_breakpoints; -#endif - int many_ioeventfds; - int intx_set_mask; - /* The man page (and posix) say ioctl numbers are signed int, but - * they're not. Linux, glibc and *BSD all treat ioctl numbers as - * unsigned, and treating them as signed here can break things */ - unsigned irq_set_ioctl; - unsigned int sigmask_len; - GHashTable *gsimap; -#ifdef KVM_CAP_IRQ_ROUTING - struct kvm_irq_routing *irq_routes; - int nr_allocated_irq_routes; - unsigned long *used_gsi_bitmap; - unsigned int gsi_count; - QTAILQ_HEAD(msi_hashtab, KVMMSIRoute) msi_hashtab[KVM_MSI_HASHTAB_SIZE]; -#endif - KVMMemoryListener memory_listener; - QLIST_HEAD(, KVMParkedVcpu) kvm_parked_vcpus; -}; - -KVMState *kvm_state; -bool kvm_kernel_irqchip; -bool kvm_split_irqchip; -bool kvm_async_interrupts_allowed; -bool kvm_halt_in_kernel_allowed; -bool kvm_eventfds_allowed; -bool kvm_irqfds_allowed; -bool kvm_resamplefds_allowed; -bool kvm_msi_via_irqfd_allowed; -bool kvm_gsi_routing_allowed; -bool kvm_gsi_direct_mapping; -bool kvm_allowed; -bool kvm_readonly_mem_allowed; -bool kvm_vm_attributes_allowed; -bool kvm_direct_msi_allowed; -bool kvm_ioeventfd_any_length_allowed; -bool kvm_msi_use_devid; -static bool kvm_immediate_exit; - -static const KVMCapabilityInfo kvm_required_capabilites[] = { - KVM_CAP_INFO(USER_MEMORY), - KVM_CAP_INFO(DESTROY_MEMORY_REGION_WORKS), - KVM_CAP_LAST_INFO -}; - -int kvm_get_max_memslots(void) -{ - KVMState *s = KVM_STATE(current_machine->accelerator); - - return s->nr_slots; -} - -static KVMSlot *kvm_get_free_slot(KVMMemoryListener *kml) -{ - KVMState *s = kvm_state; - int i; - - for (i = 0; i < s->nr_slots; i++) { - if (kml->slots[i].memory_size == 0) { - return &kml->slots[i]; - } - } - - return NULL; -} - -bool kvm_has_free_slot(MachineState *ms) -{ - KVMState *s = KVM_STATE(ms->accelerator); - - return kvm_get_free_slot(&s->memory_listener); -} - -static KVMSlot *kvm_alloc_slot(KVMMemoryListener *kml) -{ - KVMSlot *slot = kvm_get_free_slot(kml); - - if (slot) { - return slot; - } - - fprintf(stderr, "%s: no free slot available\n", __func__); - abort(); -} - -static KVMSlot *kvm_lookup_matching_slot(KVMMemoryListener *kml, - hwaddr start_addr, - hwaddr end_addr) -{ - KVMState *s = kvm_state; - int i; - - for (i = 0; i < s->nr_slots; i++) { - KVMSlot *mem = &kml->slots[i]; - - if (start_addr == mem->start_addr && - end_addr == mem->start_addr + mem->memory_size) { - return mem; - } - } - - return NULL; -} - -/* - * Find overlapping slot with lowest start address - */ -static KVMSlot *kvm_lookup_overlapping_slot(KVMMemoryListener *kml, - hwaddr start_addr, - hwaddr end_addr) -{ - KVMState *s = kvm_state; - KVMSlot *found = NULL; - int i; - - for (i = 0; i < s->nr_slots; i++) { - KVMSlot *mem = &kml->slots[i]; - - if (mem->memory_size == 0 || - (found && found->start_addr < mem->start_addr)) { - continue; - } - - if (end_addr > mem->start_addr && - start_addr < mem->start_addr + mem->memory_size) { - found = mem; - } - } - - return found; -} - -int kvm_physical_memory_addr_from_host(KVMState *s, void *ram, - hwaddr *phys_addr) -{ - KVMMemoryListener *kml = &s->memory_listener; - int i; - - for (i = 0; i < s->nr_slots; i++) { - KVMSlot *mem = &kml->slots[i]; - - if (ram >= mem->ram && ram < mem->ram + mem->memory_size) { - *phys_addr = mem->start_addr + (ram - mem->ram); - return 1; - } - } - - return 0; -} - -static int kvm_set_user_memory_region(KVMMemoryListener *kml, KVMSlot *slot) -{ - KVMState *s = kvm_state; - struct kvm_userspace_memory_region mem; - - mem.slot = slot->slot | (kml->as_id << 16); - mem.guest_phys_addr = slot->start_addr; - mem.userspace_addr = (unsigned long)slot->ram; - mem.flags = slot->flags; - - if (slot->memory_size && mem.flags & KVM_MEM_READONLY) { - /* Set the slot size to 0 before setting the slot to the desired - * value. This is needed based on KVM commit 75d61fbc. */ - mem.memory_size = 0; - kvm_vm_ioctl(s, KVM_SET_USER_MEMORY_REGION, &mem); - } - mem.memory_size = slot->memory_size; - return kvm_vm_ioctl(s, KVM_SET_USER_MEMORY_REGION, &mem); -} - -int kvm_destroy_vcpu(CPUState *cpu) -{ - KVMState *s = kvm_state; - long mmap_size; - struct KVMParkedVcpu *vcpu = NULL; - int ret = 0; - - DPRINTF("kvm_destroy_vcpu\n"); - - mmap_size = kvm_ioctl(s, KVM_GET_VCPU_MMAP_SIZE, 0); - if (mmap_size < 0) { - ret = mmap_size; - DPRINTF("KVM_GET_VCPU_MMAP_SIZE failed\n"); - goto err; - } - - ret = munmap(cpu->kvm_run, mmap_size); - if (ret < 0) { - goto err; - } - - vcpu = g_malloc0(sizeof(*vcpu)); - vcpu->vcpu_id = kvm_arch_vcpu_id(cpu); - vcpu->kvm_fd = cpu->kvm_fd; - QLIST_INSERT_HEAD(&kvm_state->kvm_parked_vcpus, vcpu, node); -err: - return ret; -} - -static int kvm_get_vcpu(KVMState *s, unsigned long vcpu_id) -{ - struct KVMParkedVcpu *cpu; - - QLIST_FOREACH(cpu, &s->kvm_parked_vcpus, node) { - if (cpu->vcpu_id == vcpu_id) { - int kvm_fd; - - QLIST_REMOVE(cpu, node); - kvm_fd = cpu->kvm_fd; - g_free(cpu); - return kvm_fd; - } - } - - return kvm_vm_ioctl(s, KVM_CREATE_VCPU, (void *)vcpu_id); -} - -int kvm_init_vcpu(CPUState *cpu) -{ - KVMState *s = kvm_state; - long mmap_size; - int ret; - - DPRINTF("kvm_init_vcpu\n"); - - ret = kvm_get_vcpu(s, kvm_arch_vcpu_id(cpu)); - if (ret < 0) { - DPRINTF("kvm_create_vcpu failed\n"); - goto err; - } - - cpu->kvm_fd = ret; - cpu->kvm_state = s; - cpu->kvm_vcpu_dirty = true; - - mmap_size = kvm_ioctl(s, KVM_GET_VCPU_MMAP_SIZE, 0); - if (mmap_size < 0) { - ret = mmap_size; - DPRINTF("KVM_GET_VCPU_MMAP_SIZE failed\n"); - goto err; - } - - cpu->kvm_run = mmap(NULL, mmap_size, PROT_READ | PROT_WRITE, MAP_SHARED, - cpu->kvm_fd, 0); - if (cpu->kvm_run == MAP_FAILED) { - ret = -errno; - DPRINTF("mmap'ing vcpu state failed\n"); - goto err; - } - - if (s->coalesced_mmio && !s->coalesced_mmio_ring) { - s->coalesced_mmio_ring = - (void *)cpu->kvm_run + s->coalesced_mmio * PAGE_SIZE; - } - - ret = kvm_arch_init_vcpu(cpu); -err: - return ret; -} - -/* - * dirty pages logging control - */ - -static int kvm_mem_flags(MemoryRegion *mr) -{ - bool readonly = mr->readonly || memory_region_is_romd(mr); - int flags = 0; - - if (memory_region_get_dirty_log_mask(mr) != 0) { - flags |= KVM_MEM_LOG_DIRTY_PAGES; - } - if (readonly && kvm_readonly_mem_allowed) { - flags |= KVM_MEM_READONLY; - } - return flags; -} - -static int kvm_slot_update_flags(KVMMemoryListener *kml, KVMSlot *mem, - MemoryRegion *mr) -{ - int old_flags; - - old_flags = mem->flags; - mem->flags = kvm_mem_flags(mr); - - /* If nothing changed effectively, no need to issue ioctl */ - if (mem->flags == old_flags) { - return 0; - } - - return kvm_set_user_memory_region(kml, mem); -} - -static int kvm_section_update_flags(KVMMemoryListener *kml, - MemoryRegionSection *section) -{ - hwaddr phys_addr = section->offset_within_address_space; - ram_addr_t size = int128_get64(section->size); - KVMSlot *mem = kvm_lookup_matching_slot(kml, phys_addr, phys_addr + size); - - if (mem == NULL) { - return 0; - } else { - return kvm_slot_update_flags(kml, mem, section->mr); - } -} - -static void kvm_log_start(MemoryListener *listener, - MemoryRegionSection *section, - int old, int new) -{ - KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener); - int r; - - if (old != 0) { - return; - } - - r = kvm_section_update_flags(kml, section); - if (r < 0) { - abort(); - } -} - -static void kvm_log_stop(MemoryListener *listener, - MemoryRegionSection *section, - int old, int new) -{ - KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener); - int r; - - if (new != 0) { - return; - } - - r = kvm_section_update_flags(kml, section); - if (r < 0) { - abort(); - } -} - -/* get kvm's dirty pages bitmap and update qemu's */ -static int kvm_get_dirty_pages_log_range(MemoryRegionSection *section, - unsigned long *bitmap) -{ - ram_addr_t start = section->offset_within_region + - memory_region_get_ram_addr(section->mr); - ram_addr_t pages = int128_get64(section->size) / getpagesize(); - - cpu_physical_memory_set_dirty_lebitmap(bitmap, start, pages); - return 0; -} - -#define ALIGN(x, y) (((x)+(y)-1) & ~((y)-1)) - -/** - * kvm_physical_sync_dirty_bitmap - Grab dirty bitmap from kernel space - * This function updates qemu's dirty bitmap using - * memory_region_set_dirty(). This means all bits are set - * to dirty. - * - * @start_add: start of logged region. - * @end_addr: end of logged region. - */ -static int kvm_physical_sync_dirty_bitmap(KVMMemoryListener *kml, - MemoryRegionSection *section) -{ - KVMState *s = kvm_state; - unsigned long size, allocated_size = 0; - struct kvm_dirty_log d = {}; - KVMSlot *mem; - int ret = 0; - hwaddr start_addr = section->offset_within_address_space; - hwaddr end_addr = start_addr + int128_get64(section->size); - - d.dirty_bitmap = NULL; - while (start_addr < end_addr) { - mem = kvm_lookup_overlapping_slot(kml, start_addr, end_addr); - if (mem == NULL) { - break; - } - - /* XXX bad kernel interface alert - * For dirty bitmap, kernel allocates array of size aligned to - * bits-per-long. But for case when the kernel is 64bits and - * the userspace is 32bits, userspace can't align to the same - * bits-per-long, since sizeof(long) is different between kernel - * and user space. This way, userspace will provide buffer which - * may be 4 bytes less than the kernel will use, resulting in - * userspace memory corruption (which is not detectable by valgrind - * too, in most cases). - * So for now, let's align to 64 instead of HOST_LONG_BITS here, in - * a hope that sizeof(long) won't become >8 any time soon. - */ - size = ALIGN(((mem->memory_size) >> TARGET_PAGE_BITS), - /*HOST_LONG_BITS*/ 64) / 8; - if (!d.dirty_bitmap) { - d.dirty_bitmap = g_malloc(size); - } else if (size > allocated_size) { - d.dirty_bitmap = g_realloc(d.dirty_bitmap, size); - } - allocated_size = size; - memset(d.dirty_bitmap, 0, allocated_size); - - d.slot = mem->slot | (kml->as_id << 16); - if (kvm_vm_ioctl(s, KVM_GET_DIRTY_LOG, &d) == -1) { - DPRINTF("ioctl failed %d\n", errno); - ret = -1; - break; - } - - kvm_get_dirty_pages_log_range(section, d.dirty_bitmap); - start_addr = mem->start_addr + mem->memory_size; - } - g_free(d.dirty_bitmap); - - return ret; -} - -static void kvm_coalesce_mmio_region(MemoryListener *listener, - MemoryRegionSection *secion, - hwaddr start, hwaddr size) -{ - KVMState *s = kvm_state; - - if (s->coalesced_mmio) { - struct kvm_coalesced_mmio_zone zone; - - zone.addr = start; - zone.size = size; - zone.pad = 0; - - (void)kvm_vm_ioctl(s, KVM_REGISTER_COALESCED_MMIO, &zone); - } -} - -static void kvm_uncoalesce_mmio_region(MemoryListener *listener, - MemoryRegionSection *secion, - hwaddr start, hwaddr size) -{ - KVMState *s = kvm_state; - - if (s->coalesced_mmio) { - struct kvm_coalesced_mmio_zone zone; - - zone.addr = start; - zone.size = size; - zone.pad = 0; - - (void)kvm_vm_ioctl(s, KVM_UNREGISTER_COALESCED_MMIO, &zone); - } -} - -int kvm_check_extension(KVMState *s, unsigned int extension) -{ - int ret; - - ret = kvm_ioctl(s, KVM_CHECK_EXTENSION, extension); - if (ret < 0) { - ret = 0; - } - - return ret; -} - -int kvm_vm_check_extension(KVMState *s, unsigned int extension) -{ - int ret; - - ret = kvm_vm_ioctl(s, KVM_CHECK_EXTENSION, extension); - if (ret < 0) { - /* VM wide version not implemented, use global one instead */ - ret = kvm_check_extension(s, extension); - } - - return ret; -} - -static uint32_t adjust_ioeventfd_endianness(uint32_t val, uint32_t size) -{ -#if defined(HOST_WORDS_BIGENDIAN) != defined(TARGET_WORDS_BIGENDIAN) - /* The kernel expects ioeventfd values in HOST_WORDS_BIGENDIAN - * endianness, but the memory core hands them in target endianness. - * For example, PPC is always treated as big-endian even if running - * on KVM and on PPC64LE. Correct here. - */ - switch (size) { - case 2: - val = bswap16(val); - break; - case 4: - val = bswap32(val); - break; - } -#endif - return val; -} - -static int kvm_set_ioeventfd_mmio(int fd, hwaddr addr, uint32_t val, - bool assign, uint32_t size, bool datamatch) -{ - int ret; - struct kvm_ioeventfd iofd = { - .datamatch = datamatch ? adjust_ioeventfd_endianness(val, size) : 0, - .addr = addr, - .len = size, - .flags = 0, - .fd = fd, - }; - - if (!kvm_enabled()) { - return -ENOSYS; - } - - if (datamatch) { - iofd.flags |= KVM_IOEVENTFD_FLAG_DATAMATCH; - } - if (!assign) { - iofd.flags |= KVM_IOEVENTFD_FLAG_DEASSIGN; - } - - ret = kvm_vm_ioctl(kvm_state, KVM_IOEVENTFD, &iofd); - - if (ret < 0) { - return -errno; - } - - return 0; -} - -static int kvm_set_ioeventfd_pio(int fd, uint16_t addr, uint16_t val, - bool assign, uint32_t size, bool datamatch) -{ - struct kvm_ioeventfd kick = { - .datamatch = datamatch ? adjust_ioeventfd_endianness(val, size) : 0, - .addr = addr, - .flags = KVM_IOEVENTFD_FLAG_PIO, - .len = size, - .fd = fd, - }; - int r; - if (!kvm_enabled()) { - return -ENOSYS; - } - if (datamatch) { - kick.flags |= KVM_IOEVENTFD_FLAG_DATAMATCH; - } - if (!assign) { - kick.flags |= KVM_IOEVENTFD_FLAG_DEASSIGN; - } - r = kvm_vm_ioctl(kvm_state, KVM_IOEVENTFD, &kick); - if (r < 0) { - return r; - } - return 0; -} - - -static int kvm_check_many_ioeventfds(void) -{ - /* Userspace can use ioeventfd for io notification. This requires a host - * that supports eventfd(2) and an I/O thread; since eventfd does not - * support SIGIO it cannot interrupt the vcpu. - * - * Older kernels have a 6 device limit on the KVM io bus. Find out so we - * can avoid creating too many ioeventfds. - */ -#if defined(CONFIG_EVENTFD) - int ioeventfds[7]; - int i, ret = 0; - for (i = 0; i < ARRAY_SIZE(ioeventfds); i++) { - ioeventfds[i] = eventfd(0, EFD_CLOEXEC); - if (ioeventfds[i] < 0) { - break; - } - ret = kvm_set_ioeventfd_pio(ioeventfds[i], 0, i, true, 2, true); - if (ret < 0) { - close(ioeventfds[i]); - break; - } - } - - /* Decide whether many devices are supported or not */ - ret = i == ARRAY_SIZE(ioeventfds); - - while (i-- > 0) { - kvm_set_ioeventfd_pio(ioeventfds[i], 0, i, false, 2, true); - close(ioeventfds[i]); - } - return ret; -#else - return 0; -#endif -} - -static const KVMCapabilityInfo * -kvm_check_extension_list(KVMState *s, const KVMCapabilityInfo *list) -{ - while (list->name) { - if (!kvm_check_extension(s, list->value)) { - return list; - } - list++; - } - return NULL; -} - -static void kvm_set_phys_mem(KVMMemoryListener *kml, - MemoryRegionSection *section, bool add) -{ - KVMState *s = kvm_state; - KVMSlot *mem, old; - int err; - MemoryRegion *mr = section->mr; - bool writeable = !mr->readonly && !mr->rom_device; - hwaddr start_addr = section->offset_within_address_space; - ram_addr_t size = int128_get64(section->size); - void *ram = NULL; - unsigned delta; - - /* kvm works in page size chunks, but the function may be called - with sub-page size and unaligned start address. Pad the start - address to next and truncate size to previous page boundary. */ - delta = qemu_real_host_page_size - (start_addr & ~qemu_real_host_page_mask); - delta &= ~qemu_real_host_page_mask; - if (delta > size) { - return; - } - start_addr += delta; - size -= delta; - size &= qemu_real_host_page_mask; - if (!size || (start_addr & ~qemu_real_host_page_mask)) { - return; - } - - if (!memory_region_is_ram(mr)) { - if (writeable || !kvm_readonly_mem_allowed) { - return; - } else if (!mr->romd_mode) { - /* If the memory device is not in romd_mode, then we actually want - * to remove the kvm memory slot so all accesses will trap. */ - add = false; - } - } - - ram = memory_region_get_ram_ptr(mr) + section->offset_within_region + delta; - - while (1) { - mem = kvm_lookup_overlapping_slot(kml, start_addr, start_addr + size); - if (!mem) { - break; - } - - if (add && start_addr >= mem->start_addr && - (start_addr + size <= mem->start_addr + mem->memory_size) && - (ram - start_addr == mem->ram - mem->start_addr)) { - /* The new slot fits into the existing one and comes with - * identical parameters - update flags and done. */ - kvm_slot_update_flags(kml, mem, mr); - return; - } - - old = *mem; - - if (mem->flags & KVM_MEM_LOG_DIRTY_PAGES) { - kvm_physical_sync_dirty_bitmap(kml, section); - } - - /* unregister the overlapping slot */ - mem->memory_size = 0; - err = kvm_set_user_memory_region(kml, mem); - if (err) { - fprintf(stderr, "%s: error unregistering overlapping slot: %s\n", - __func__, strerror(-err)); - abort(); - } - - /* Workaround for older KVM versions: we can't join slots, even not by - * unregistering the previous ones and then registering the larger - * slot. We have to maintain the existing fragmentation. Sigh. - * - * This workaround assumes that the new slot starts at the same - * address as the first existing one. If not or if some overlapping - * slot comes around later, we will fail (not seen in practice so far) - * - and actually require a recent KVM version. */ - if (s->broken_set_mem_region && - old.start_addr == start_addr && old.memory_size < size && add) { - mem = kvm_alloc_slot(kml); - mem->memory_size = old.memory_size; - mem->start_addr = old.start_addr; - mem->ram = old.ram; - mem->flags = kvm_mem_flags(mr); - - err = kvm_set_user_memory_region(kml, mem); - if (err) { - fprintf(stderr, "%s: error updating slot: %s\n", __func__, - strerror(-err)); - abort(); - } - - start_addr += old.memory_size; - ram += old.memory_size; - size -= old.memory_size; - continue; - } - - /* register prefix slot */ - if (old.start_addr < start_addr) { - mem = kvm_alloc_slot(kml); - mem->memory_size = start_addr - old.start_addr; - mem->start_addr = old.start_addr; - mem->ram = old.ram; - mem->flags = kvm_mem_flags(mr); - - err = kvm_set_user_memory_region(kml, mem); - if (err) { - fprintf(stderr, "%s: error registering prefix slot: %s\n", - __func__, strerror(-err)); -#ifdef TARGET_PPC - fprintf(stderr, "%s: This is probably because your kernel's " \ - "PAGE_SIZE is too big. Please try to use 4k " \ - "PAGE_SIZE!\n", __func__); -#endif - abort(); - } - } - - /* register suffix slot */ - if (old.start_addr + old.memory_size > start_addr + size) { - ram_addr_t size_delta; - - mem = kvm_alloc_slot(kml); - mem->start_addr = start_addr + size; - size_delta = mem->start_addr - old.start_addr; - mem->memory_size = old.memory_size - size_delta; - mem->ram = old.ram + size_delta; - mem->flags = kvm_mem_flags(mr); - - err = kvm_set_user_memory_region(kml, mem); - if (err) { - fprintf(stderr, "%s: error registering suffix slot: %s\n", - __func__, strerror(-err)); - abort(); - } - } - } - - /* in case the KVM bug workaround already "consumed" the new slot */ - if (!size) { - return; - } - if (!add) { - return; - } - mem = kvm_alloc_slot(kml); - mem->memory_size = size; - mem->start_addr = start_addr; - mem->ram = ram; - mem->flags = kvm_mem_flags(mr); - - err = kvm_set_user_memory_region(kml, mem); - if (err) { - fprintf(stderr, "%s: error registering slot: %s\n", __func__, - strerror(-err)); - abort(); - } -} - -static void kvm_region_add(MemoryListener *listener, - MemoryRegionSection *section) -{ - KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener); - - memory_region_ref(section->mr); - kvm_set_phys_mem(kml, section, true); -} - -static void kvm_region_del(MemoryListener *listener, - MemoryRegionSection *section) -{ - KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener); - - kvm_set_phys_mem(kml, section, false); - memory_region_unref(section->mr); -} - -static void kvm_log_sync(MemoryListener *listener, - MemoryRegionSection *section) -{ - KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener); - int r; - - r = kvm_physical_sync_dirty_bitmap(kml, section); - if (r < 0) { - abort(); - } -} - -static void kvm_mem_ioeventfd_add(MemoryListener *listener, - MemoryRegionSection *section, - bool match_data, uint64_t data, - EventNotifier *e) -{ - int fd = event_notifier_get_fd(e); - int r; - - r = kvm_set_ioeventfd_mmio(fd, section->offset_within_address_space, - data, true, int128_get64(section->size), - match_data); - if (r < 0) { - fprintf(stderr, "%s: error adding ioeventfd: %s\n", - __func__, strerror(-r)); - abort(); - } -} - -static void kvm_mem_ioeventfd_del(MemoryListener *listener, - MemoryRegionSection *section, - bool match_data, uint64_t data, - EventNotifier *e) -{ - int fd = event_notifier_get_fd(e); - int r; - - r = kvm_set_ioeventfd_mmio(fd, section->offset_within_address_space, - data, false, int128_get64(section->size), - match_data); - if (r < 0) { - abort(); - } -} - -static void kvm_io_ioeventfd_add(MemoryListener *listener, - MemoryRegionSection *section, - bool match_data, uint64_t data, - EventNotifier *e) -{ - int fd = event_notifier_get_fd(e); - int r; - - r = kvm_set_ioeventfd_pio(fd, section->offset_within_address_space, - data, true, int128_get64(section->size), - match_data); - if (r < 0) { - fprintf(stderr, "%s: error adding ioeventfd: %s\n", - __func__, strerror(-r)); - abort(); - } -} - -static void kvm_io_ioeventfd_del(MemoryListener *listener, - MemoryRegionSection *section, - bool match_data, uint64_t data, - EventNotifier *e) - -{ - int fd = event_notifier_get_fd(e); - int r; - - r = kvm_set_ioeventfd_pio(fd, section->offset_within_address_space, - data, false, int128_get64(section->size), - match_data); - if (r < 0) { - abort(); - } -} - -void kvm_memory_listener_register(KVMState *s, KVMMemoryListener *kml, - AddressSpace *as, int as_id) -{ - int i; - - kml->slots = g_malloc0(s->nr_slots * sizeof(KVMSlot)); - kml->as_id = as_id; - - for (i = 0; i < s->nr_slots; i++) { - kml->slots[i].slot = i; - } - - kml->listener.region_add = kvm_region_add; - kml->listener.region_del = kvm_region_del; - kml->listener.log_start = kvm_log_start; - kml->listener.log_stop = kvm_log_stop; - kml->listener.log_sync = kvm_log_sync; - kml->listener.priority = 10; - - memory_listener_register(&kml->listener, as); -} - -static MemoryListener kvm_io_listener = { - .eventfd_add = kvm_io_ioeventfd_add, - .eventfd_del = kvm_io_ioeventfd_del, - .priority = 10, -}; - -static void kvm_handle_interrupt(CPUState *cpu, int mask) -{ - cpu->interrupt_request |= mask; - - if (!qemu_cpu_is_self(cpu)) { - qemu_cpu_kick(cpu); - } -} - -int kvm_set_irq(KVMState *s, int irq, int level) -{ - struct kvm_irq_level event; - int ret; - - assert(kvm_async_interrupts_enabled()); - - event.level = level; - event.irq = irq; - ret = kvm_vm_ioctl(s, s->irq_set_ioctl, &event); - if (ret < 0) { - perror("kvm_set_irq"); - abort(); - } - - return (s->irq_set_ioctl == KVM_IRQ_LINE) ? 1 : event.status; -} - -#ifdef KVM_CAP_IRQ_ROUTING -typedef struct KVMMSIRoute { - struct kvm_irq_routing_entry kroute; - QTAILQ_ENTRY(KVMMSIRoute) entry; -} KVMMSIRoute; - -static void set_gsi(KVMState *s, unsigned int gsi) -{ - set_bit(gsi, s->used_gsi_bitmap); -} - -static void clear_gsi(KVMState *s, unsigned int gsi) -{ - clear_bit(gsi, s->used_gsi_bitmap); -} - -void kvm_init_irq_routing(KVMState *s) -{ - int gsi_count, i; - - gsi_count = kvm_check_extension(s, KVM_CAP_IRQ_ROUTING) - 1; - if (gsi_count > 0) { - /* Round up so we can search ints using ffs */ - s->used_gsi_bitmap = bitmap_new(gsi_count); - s->gsi_count = gsi_count; - } - - s->irq_routes = g_malloc0(sizeof(*s->irq_routes)); - s->nr_allocated_irq_routes = 0; - - if (!kvm_direct_msi_allowed) { - for (i = 0; i < KVM_MSI_HASHTAB_SIZE; i++) { - QTAILQ_INIT(&s->msi_hashtab[i]); - } - } - - kvm_arch_init_irq_routing(s); -} - -void kvm_irqchip_commit_routes(KVMState *s) -{ - int ret; - - if (kvm_gsi_direct_mapping()) { - return; - } - - if (!kvm_gsi_routing_enabled()) { - return; - } - - s->irq_routes->flags = 0; - trace_kvm_irqchip_commit_routes(); - ret = kvm_vm_ioctl(s, KVM_SET_GSI_ROUTING, s->irq_routes); - assert(ret == 0); -} - -static void kvm_add_routing_entry(KVMState *s, - struct kvm_irq_routing_entry *entry) -{ - struct kvm_irq_routing_entry *new; - int n, size; - - if (s->irq_routes->nr == s->nr_allocated_irq_routes) { - n = s->nr_allocated_irq_routes * 2; - if (n < 64) { - n = 64; - } - size = sizeof(struct kvm_irq_routing); - size += n * sizeof(*new); - s->irq_routes = g_realloc(s->irq_routes, size); - s->nr_allocated_irq_routes = n; - } - n = s->irq_routes->nr++; - new = &s->irq_routes->entries[n]; - - *new = *entry; - - set_gsi(s, entry->gsi); -} - -static int kvm_update_routing_entry(KVMState *s, - struct kvm_irq_routing_entry *new_entry) -{ - struct kvm_irq_routing_entry *entry; - int n; - - for (n = 0; n < s->irq_routes->nr; n++) { - entry = &s->irq_routes->entries[n]; - if (entry->gsi != new_entry->gsi) { - continue; - } - - if(!memcmp(entry, new_entry, sizeof *entry)) { - return 0; - } - - *entry = *new_entry; - - return 0; - } - - return -ESRCH; -} - -void kvm_irqchip_add_irq_route(KVMState *s, int irq, int irqchip, int pin) -{ - struct kvm_irq_routing_entry e = {}; - - assert(pin < s->gsi_count); - - e.gsi = irq; - e.type = KVM_IRQ_ROUTING_IRQCHIP; - e.flags = 0; - e.u.irqchip.irqchip = irqchip; - e.u.irqchip.pin = pin; - kvm_add_routing_entry(s, &e); -} - -void kvm_irqchip_release_virq(KVMState *s, int virq) -{ - struct kvm_irq_routing_entry *e; - int i; - - if (kvm_gsi_direct_mapping()) { - return; - } - - for (i = 0; i < s->irq_routes->nr; i++) { - e = &s->irq_routes->entries[i]; - if (e->gsi == virq) { - s->irq_routes->nr--; - *e = s->irq_routes->entries[s->irq_routes->nr]; - } - } - clear_gsi(s, virq); - kvm_arch_release_virq_post(virq); - trace_kvm_irqchip_release_virq(virq); -} - -static unsigned int kvm_hash_msi(uint32_t data) -{ - /* This is optimized for IA32 MSI layout. However, no other arch shall - * repeat the mistake of not providing a direct MSI injection API. */ - return data & 0xff; -} - -static void kvm_flush_dynamic_msi_routes(KVMState *s) -{ - KVMMSIRoute *route, *next; - unsigned int hash; - - for (hash = 0; hash < KVM_MSI_HASHTAB_SIZE; hash++) { - QTAILQ_FOREACH_SAFE(route, &s->msi_hashtab[hash], entry, next) { - kvm_irqchip_release_virq(s, route->kroute.gsi); - QTAILQ_REMOVE(&s->msi_hashtab[hash], route, entry); - g_free(route); - } - } -} - -static int kvm_irqchip_get_virq(KVMState *s) -{ - int next_virq; - - /* - * PIC and IOAPIC share the first 16 GSI numbers, thus the available - * GSI numbers are more than the number of IRQ route. Allocating a GSI - * number can succeed even though a new route entry cannot be added. - * When this happens, flush dynamic MSI entries to free IRQ route entries. - */ - if (!kvm_direct_msi_allowed && s->irq_routes->nr == s->gsi_count) { - kvm_flush_dynamic_msi_routes(s); - } - - /* Return the lowest unused GSI in the bitmap */ - next_virq = find_first_zero_bit(s->used_gsi_bitmap, s->gsi_count); - if (next_virq >= s->gsi_count) { - return -ENOSPC; - } else { - return next_virq; - } -} - -static KVMMSIRoute *kvm_lookup_msi_route(KVMState *s, MSIMessage msg) -{ - unsigned int hash = kvm_hash_msi(msg.data); - KVMMSIRoute *route; - - QTAILQ_FOREACH(route, &s->msi_hashtab[hash], entry) { - if (route->kroute.u.msi.address_lo == (uint32_t)msg.address && - route->kroute.u.msi.address_hi == (msg.address >> 32) && - route->kroute.u.msi.data == le32_to_cpu(msg.data)) { - return route; - } - } - return NULL; -} - -int kvm_irqchip_send_msi(KVMState *s, MSIMessage msg) -{ - struct kvm_msi msi; - KVMMSIRoute *route; - - if (kvm_direct_msi_allowed) { - msi.address_lo = (uint32_t)msg.address; - msi.address_hi = msg.address >> 32; - msi.data = le32_to_cpu(msg.data); - msi.flags = 0; - memset(msi.pad, 0, sizeof(msi.pad)); - - return kvm_vm_ioctl(s, KVM_SIGNAL_MSI, &msi); - } - - route = kvm_lookup_msi_route(s, msg); - if (!route) { - int virq; - - virq = kvm_irqchip_get_virq(s); - if (virq < 0) { - return virq; - } - - route = g_malloc0(sizeof(KVMMSIRoute)); - route->kroute.gsi = virq; - route->kroute.type = KVM_IRQ_ROUTING_MSI; - route->kroute.flags = 0; - route->kroute.u.msi.address_lo = (uint32_t)msg.address; - route->kroute.u.msi.address_hi = msg.address >> 32; - route->kroute.u.msi.data = le32_to_cpu(msg.data); - - kvm_add_routing_entry(s, &route->kroute); - kvm_irqchip_commit_routes(s); - - QTAILQ_INSERT_TAIL(&s->msi_hashtab[kvm_hash_msi(msg.data)], route, - entry); - } - - assert(route->kroute.type == KVM_IRQ_ROUTING_MSI); - - return kvm_set_irq(s, route->kroute.gsi, 1); -} - -int kvm_irqchip_add_msi_route(KVMState *s, int vector, PCIDevice *dev) -{ - struct kvm_irq_routing_entry kroute = {}; - int virq; - MSIMessage msg = {0, 0}; - - if (dev) { - msg = pci_get_msi_message(dev, vector); - } - - if (kvm_gsi_direct_mapping()) { - return kvm_arch_msi_data_to_gsi(msg.data); - } - - if (!kvm_gsi_routing_enabled()) { - return -ENOSYS; - } - - virq = kvm_irqchip_get_virq(s); - if (virq < 0) { - return virq; - } - - kroute.gsi = virq; - kroute.type = KVM_IRQ_ROUTING_MSI; - kroute.flags = 0; - kroute.u.msi.address_lo = (uint32_t)msg.address; - kroute.u.msi.address_hi = msg.address >> 32; - kroute.u.msi.data = le32_to_cpu(msg.data); - if (kvm_msi_devid_required()) { - kroute.flags = KVM_MSI_VALID_DEVID; - kroute.u.msi.devid = pci_requester_id(dev); - } - if (kvm_arch_fixup_msi_route(&kroute, msg.address, msg.data, dev)) { - kvm_irqchip_release_virq(s, virq); - return -EINVAL; - } - - trace_kvm_irqchip_add_msi_route(dev ? dev->name : (char *)"N/A", - vector, virq); - - kvm_add_routing_entry(s, &kroute); - kvm_arch_add_msi_route_post(&kroute, vector, dev); - kvm_irqchip_commit_routes(s); - - return virq; -} - -int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg, - PCIDevice *dev) -{ - struct kvm_irq_routing_entry kroute = {}; - - if (kvm_gsi_direct_mapping()) { - return 0; - } - - if (!kvm_irqchip_in_kernel()) { - return -ENOSYS; - } - - kroute.gsi = virq; - kroute.type = KVM_IRQ_ROUTING_MSI; - kroute.flags = 0; - kroute.u.msi.address_lo = (uint32_t)msg.address; - kroute.u.msi.address_hi = msg.address >> 32; - kroute.u.msi.data = le32_to_cpu(msg.data); - if (kvm_msi_devid_required()) { - kroute.flags = KVM_MSI_VALID_DEVID; - kroute.u.msi.devid = pci_requester_id(dev); - } - if (kvm_arch_fixup_msi_route(&kroute, msg.address, msg.data, dev)) { - return -EINVAL; - } - - trace_kvm_irqchip_update_msi_route(virq); - - return kvm_update_routing_entry(s, &kroute); -} - -static int kvm_irqchip_assign_irqfd(KVMState *s, int fd, int rfd, int virq, - bool assign) -{ - struct kvm_irqfd irqfd = { - .fd = fd, - .gsi = virq, - .flags = assign ? 0 : KVM_IRQFD_FLAG_DEASSIGN, - }; - - if (rfd != -1) { - irqfd.flags |= KVM_IRQFD_FLAG_RESAMPLE; - irqfd.resamplefd = rfd; - } - - if (!kvm_irqfds_enabled()) { - return -ENOSYS; - } - - return kvm_vm_ioctl(s, KVM_IRQFD, &irqfd); -} - -int kvm_irqchip_add_adapter_route(KVMState *s, AdapterInfo *adapter) -{ - struct kvm_irq_routing_entry kroute = {}; - int virq; - - if (!kvm_gsi_routing_enabled()) { - return -ENOSYS; - } - - virq = kvm_irqchip_get_virq(s); - if (virq < 0) { - return virq; - } - - kroute.gsi = virq; - kroute.type = KVM_IRQ_ROUTING_S390_ADAPTER; - kroute.flags = 0; - kroute.u.adapter.summary_addr = adapter->summary_addr; - kroute.u.adapter.ind_addr = adapter->ind_addr; - kroute.u.adapter.summary_offset = adapter->summary_offset; - kroute.u.adapter.ind_offset = adapter->ind_offset; - kroute.u.adapter.adapter_id = adapter->adapter_id; - - kvm_add_routing_entry(s, &kroute); - - return virq; -} - -int kvm_irqchip_add_hv_sint_route(KVMState *s, uint32_t vcpu, uint32_t sint) -{ - struct kvm_irq_routing_entry kroute = {}; - int virq; - - if (!kvm_gsi_routing_enabled()) { - return -ENOSYS; - } - if (!kvm_check_extension(s, KVM_CAP_HYPERV_SYNIC)) { - return -ENOSYS; - } - virq = kvm_irqchip_get_virq(s); - if (virq < 0) { - return virq; - } - - kroute.gsi = virq; - kroute.type = KVM_IRQ_ROUTING_HV_SINT; - kroute.flags = 0; - kroute.u.hv_sint.vcpu = vcpu; - kroute.u.hv_sint.sint = sint; - - kvm_add_routing_entry(s, &kroute); - kvm_irqchip_commit_routes(s); - - return virq; -} - -#else /* !KVM_CAP_IRQ_ROUTING */ - -void kvm_init_irq_routing(KVMState *s) -{ -} - -void kvm_irqchip_release_virq(KVMState *s, int virq) -{ -} - -int kvm_irqchip_send_msi(KVMState *s, MSIMessage msg) -{ - abort(); -} - -int kvm_irqchip_add_msi_route(KVMState *s, int vector, PCIDevice *dev) -{ - return -ENOSYS; -} - -int kvm_irqchip_add_adapter_route(KVMState *s, AdapterInfo *adapter) -{ - return -ENOSYS; -} - -int kvm_irqchip_add_hv_sint_route(KVMState *s, uint32_t vcpu, uint32_t sint) -{ - return -ENOSYS; -} - -static int kvm_irqchip_assign_irqfd(KVMState *s, int fd, int virq, bool assign) -{ - abort(); -} - -int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg) -{ - return -ENOSYS; -} -#endif /* !KVM_CAP_IRQ_ROUTING */ - -int kvm_irqchip_add_irqfd_notifier_gsi(KVMState *s, EventNotifier *n, - EventNotifier *rn, int virq) -{ - return kvm_irqchip_assign_irqfd(s, event_notifier_get_fd(n), - rn ? event_notifier_get_fd(rn) : -1, virq, true); -} - -int kvm_irqchip_remove_irqfd_notifier_gsi(KVMState *s, EventNotifier *n, - int virq) -{ - return kvm_irqchip_assign_irqfd(s, event_notifier_get_fd(n), -1, virq, - false); -} - -int kvm_irqchip_add_irqfd_notifier(KVMState *s, EventNotifier *n, - EventNotifier *rn, qemu_irq irq) -{ - gpointer key, gsi; - gboolean found = g_hash_table_lookup_extended(s->gsimap, irq, &key, &gsi); - - if (!found) { - return -ENXIO; - } - return kvm_irqchip_add_irqfd_notifier_gsi(s, n, rn, GPOINTER_TO_INT(gsi)); -} - -int kvm_irqchip_remove_irqfd_notifier(KVMState *s, EventNotifier *n, - qemu_irq irq) -{ - gpointer key, gsi; - gboolean found = g_hash_table_lookup_extended(s->gsimap, irq, &key, &gsi); - - if (!found) { - return -ENXIO; - } - return kvm_irqchip_remove_irqfd_notifier_gsi(s, n, GPOINTER_TO_INT(gsi)); -} - -void kvm_irqchip_set_qemuirq_gsi(KVMState *s, qemu_irq irq, int gsi) -{ - g_hash_table_insert(s->gsimap, irq, GINT_TO_POINTER(gsi)); -} - -static void kvm_irqchip_create(MachineState *machine, KVMState *s) -{ - int ret; - - if (kvm_check_extension(s, KVM_CAP_IRQCHIP)) { - ; - } else if (kvm_check_extension(s, KVM_CAP_S390_IRQCHIP)) { - ret = kvm_vm_enable_cap(s, KVM_CAP_S390_IRQCHIP, 0); - if (ret < 0) { - fprintf(stderr, "Enable kernel irqchip failed: %s\n", strerror(-ret)); - exit(1); - } - } else { - return; - } - - /* First probe and see if there's a arch-specific hook to create the - * in-kernel irqchip for us */ - ret = kvm_arch_irqchip_create(machine, s); - if (ret == 0) { - if (machine_kernel_irqchip_split(machine)) { - perror("Split IRQ chip mode not supported."); - exit(1); - } else { - ret = kvm_vm_ioctl(s, KVM_CREATE_IRQCHIP); - } - } - if (ret < 0) { - fprintf(stderr, "Create kernel irqchip failed: %s\n", strerror(-ret)); - exit(1); - } - - kvm_kernel_irqchip = true; - /* If we have an in-kernel IRQ chip then we must have asynchronous - * interrupt delivery (though the reverse is not necessarily true) - */ - kvm_async_interrupts_allowed = true; - kvm_halt_in_kernel_allowed = true; - - kvm_init_irq_routing(s); - - s->gsimap = g_hash_table_new(g_direct_hash, g_direct_equal); -} - -/* Find number of supported CPUs using the recommended - * procedure from the kernel API documentation to cope with - * older kernels that may be missing capabilities. - */ -static int kvm_recommended_vcpus(KVMState *s) -{ - int ret = kvm_check_extension(s, KVM_CAP_NR_VCPUS); - return (ret) ? ret : 4; -} - -static int kvm_max_vcpus(KVMState *s) -{ - int ret = kvm_check_extension(s, KVM_CAP_MAX_VCPUS); - return (ret) ? ret : kvm_recommended_vcpus(s); -} - -static int kvm_max_vcpu_id(KVMState *s) -{ - int ret = kvm_check_extension(s, KVM_CAP_MAX_VCPU_ID); - return (ret) ? ret : kvm_max_vcpus(s); -} - -bool kvm_vcpu_id_is_valid(int vcpu_id) -{ - KVMState *s = KVM_STATE(current_machine->accelerator); - return vcpu_id >= 0 && vcpu_id < kvm_max_vcpu_id(s); -} - -static int kvm_init(MachineState *ms) -{ - MachineClass *mc = MACHINE_GET_CLASS(ms); - static const char upgrade_note[] = - "Please upgrade to at least kernel 2.6.29 or recent kvm-kmod\n" - "(see http://sourceforge.net/projects/kvm).\n"; - struct { - const char *name; - int num; - } num_cpus[] = { - { "SMP", smp_cpus }, - { "hotpluggable", max_cpus }, - { NULL, } - }, *nc = num_cpus; - int soft_vcpus_limit, hard_vcpus_limit; - KVMState *s; - const KVMCapabilityInfo *missing_cap; - int ret; - int type = 0; - const char *kvm_type; - - s = KVM_STATE(ms->accelerator); - - /* - * On systems where the kernel can support different base page - * sizes, host page size may be different from TARGET_PAGE_SIZE, - * even with KVM. TARGET_PAGE_SIZE is assumed to be the minimum - * page size for the system though. - */ - assert(TARGET_PAGE_SIZE <= getpagesize()); - - s->sigmask_len = 8; - -#ifdef KVM_CAP_SET_GUEST_DEBUG - QTAILQ_INIT(&s->kvm_sw_breakpoints); -#endif - QLIST_INIT(&s->kvm_parked_vcpus); - s->vmfd = -1; - s->fd = qemu_open("/dev/kvm", O_RDWR); - if (s->fd == -1) { - fprintf(stderr, "Could not access KVM kernel module: %m\n"); - ret = -errno; - goto err; - } - - ret = kvm_ioctl(s, KVM_GET_API_VERSION, 0); - if (ret < KVM_API_VERSION) { - if (ret >= 0) { - ret = -EINVAL; - } - fprintf(stderr, "kvm version too old\n"); - goto err; - } - - if (ret > KVM_API_VERSION) { - ret = -EINVAL; - fprintf(stderr, "kvm version not supported\n"); - goto err; - } - - kvm_immediate_exit = kvm_check_extension(s, KVM_CAP_IMMEDIATE_EXIT); - s->nr_slots = kvm_check_extension(s, KVM_CAP_NR_MEMSLOTS); - - /* If unspecified, use the default value */ - if (!s->nr_slots) { - s->nr_slots = 32; - } - - /* check the vcpu limits */ - soft_vcpus_limit = kvm_recommended_vcpus(s); - hard_vcpus_limit = kvm_max_vcpus(s); - - while (nc->name) { - if (nc->num > soft_vcpus_limit) { - fprintf(stderr, - "Warning: Number of %s cpus requested (%d) exceeds " - "the recommended cpus supported by KVM (%d)\n", - nc->name, nc->num, soft_vcpus_limit); - - if (nc->num > hard_vcpus_limit) { - fprintf(stderr, "Number of %s cpus requested (%d) exceeds " - "the maximum cpus supported by KVM (%d)\n", - nc->name, nc->num, hard_vcpus_limit); - exit(1); - } - } - nc++; - } - - kvm_type = qemu_opt_get(qemu_get_machine_opts(), "kvm-type"); - if (mc->kvm_type) { - type = mc->kvm_type(kvm_type); - } else if (kvm_type) { - ret = -EINVAL; - fprintf(stderr, "Invalid argument kvm-type=%s\n", kvm_type); - goto err; - } - - do { - ret = kvm_ioctl(s, KVM_CREATE_VM, type); - } while (ret == -EINTR); - - if (ret < 0) { - fprintf(stderr, "ioctl(KVM_CREATE_VM) failed: %d %s\n", -ret, - strerror(-ret)); - -#ifdef TARGET_S390X - if (ret == -EINVAL) { - fprintf(stderr, - "Host kernel setup problem detected. Please verify:\n"); - fprintf(stderr, "- for kernels supporting the switch_amode or" - " user_mode parameters, whether\n"); - fprintf(stderr, - " user space is running in primary address space\n"); - fprintf(stderr, - "- for kernels supporting the vm.allocate_pgste sysctl, " - "whether it is enabled\n"); - } -#endif - goto err; - } - - s->vmfd = ret; - missing_cap = kvm_check_extension_list(s, kvm_required_capabilites); - if (!missing_cap) { - missing_cap = - kvm_check_extension_list(s, kvm_arch_required_capabilities); - } - if (missing_cap) { - ret = -EINVAL; - fprintf(stderr, "kvm does not support %s\n%s", - missing_cap->name, upgrade_note); - goto err; - } - - s->coalesced_mmio = kvm_check_extension(s, KVM_CAP_COALESCED_MMIO); - - s->broken_set_mem_region = 1; - ret = kvm_check_extension(s, KVM_CAP_JOIN_MEMORY_REGIONS_WORKS); - if (ret > 0) { - s->broken_set_mem_region = 0; - } - -#ifdef KVM_CAP_VCPU_EVENTS - s->vcpu_events = kvm_check_extension(s, KVM_CAP_VCPU_EVENTS); -#endif - - s->robust_singlestep = - kvm_check_extension(s, KVM_CAP_X86_ROBUST_SINGLESTEP); - -#ifdef KVM_CAP_DEBUGREGS - s->debugregs = kvm_check_extension(s, KVM_CAP_DEBUGREGS); -#endif - -#ifdef KVM_CAP_IRQ_ROUTING - kvm_direct_msi_allowed = (kvm_check_extension(s, KVM_CAP_SIGNAL_MSI) > 0); -#endif - - s->intx_set_mask = kvm_check_extension(s, KVM_CAP_PCI_2_3); - - s->irq_set_ioctl = KVM_IRQ_LINE; - if (kvm_check_extension(s, KVM_CAP_IRQ_INJECT_STATUS)) { - s->irq_set_ioctl = KVM_IRQ_LINE_STATUS; - } - -#ifdef KVM_CAP_READONLY_MEM - kvm_readonly_mem_allowed = - (kvm_check_extension(s, KVM_CAP_READONLY_MEM) > 0); -#endif - - kvm_eventfds_allowed = - (kvm_check_extension(s, KVM_CAP_IOEVENTFD) > 0); - - kvm_irqfds_allowed = - (kvm_check_extension(s, KVM_CAP_IRQFD) > 0); - - kvm_resamplefds_allowed = - (kvm_check_extension(s, KVM_CAP_IRQFD_RESAMPLE) > 0); - - kvm_vm_attributes_allowed = - (kvm_check_extension(s, KVM_CAP_VM_ATTRIBUTES) > 0); - - kvm_ioeventfd_any_length_allowed = - (kvm_check_extension(s, KVM_CAP_IOEVENTFD_ANY_LENGTH) > 0); - - kvm_state = s; - - ret = kvm_arch_init(ms, s); - if (ret < 0) { - goto err; - } - - if (machine_kernel_irqchip_allowed(ms)) { - kvm_irqchip_create(ms, s); - } - - if (kvm_eventfds_allowed) { - s->memory_listener.listener.eventfd_add = kvm_mem_ioeventfd_add; - s->memory_listener.listener.eventfd_del = kvm_mem_ioeventfd_del; - } - s->memory_listener.listener.coalesced_mmio_add = kvm_coalesce_mmio_region; - s->memory_listener.listener.coalesced_mmio_del = kvm_uncoalesce_mmio_region; - - kvm_memory_listener_register(s, &s->memory_listener, - &address_space_memory, 0); - memory_listener_register(&kvm_io_listener, - &address_space_io); - - s->many_ioeventfds = kvm_check_many_ioeventfds(); - - cpu_interrupt_handler = kvm_handle_interrupt; - - return 0; - -err: - assert(ret < 0); - if (s->vmfd >= 0) { - close(s->vmfd); - } - if (s->fd != -1) { - close(s->fd); - } - g_free(s->memory_listener.slots); - - return ret; -} - -void kvm_set_sigmask_len(KVMState *s, unsigned int sigmask_len) -{ - s->sigmask_len = sigmask_len; -} - -static void kvm_handle_io(uint16_t port, MemTxAttrs attrs, void *data, int direction, - int size, uint32_t count) -{ - int i; - uint8_t *ptr = data; - - for (i = 0; i < count; i++) { - address_space_rw(&address_space_io, port, attrs, - ptr, size, - direction == KVM_EXIT_IO_OUT); - ptr += size; - } -} - -static int kvm_handle_internal_error(CPUState *cpu, struct kvm_run *run) -{ - fprintf(stderr, "KVM internal error. Suberror: %d\n", - run->internal.suberror); - - if (kvm_check_extension(kvm_state, KVM_CAP_INTERNAL_ERROR_DATA)) { - int i; - - for (i = 0; i < run->internal.ndata; ++i) { - fprintf(stderr, "extra data[%d]: %"PRIx64"\n", - i, (uint64_t)run->internal.data[i]); - } - } - if (run->internal.suberror == KVM_INTERNAL_ERROR_EMULATION) { - fprintf(stderr, "emulation failure\n"); - if (!kvm_arch_stop_on_emulation_error(cpu)) { - cpu_dump_state(cpu, stderr, fprintf, CPU_DUMP_CODE); - return EXCP_INTERRUPT; - } - } - /* FIXME: Should trigger a qmp message to let management know - * something went wrong. - */ - return -1; -} - -void kvm_flush_coalesced_mmio_buffer(void) -{ - KVMState *s = kvm_state; - - if (s->coalesced_flush_in_progress) { - return; - } - - s->coalesced_flush_in_progress = true; - - if (s->coalesced_mmio_ring) { - struct kvm_coalesced_mmio_ring *ring = s->coalesced_mmio_ring; - while (ring->first != ring->last) { - struct kvm_coalesced_mmio *ent; - - ent = &ring->coalesced_mmio[ring->first]; - - cpu_physical_memory_write(ent->phys_addr, ent->data, ent->len); - smp_wmb(); - ring->first = (ring->first + 1) % KVM_COALESCED_MMIO_MAX; - } - } - - s->coalesced_flush_in_progress = false; -} - -static void do_kvm_cpu_synchronize_state(CPUState *cpu, run_on_cpu_data arg) -{ - if (!cpu->kvm_vcpu_dirty) { - kvm_arch_get_registers(cpu); - cpu->kvm_vcpu_dirty = true; - } -} - -void kvm_cpu_synchronize_state(CPUState *cpu) -{ - if (!cpu->kvm_vcpu_dirty) { - run_on_cpu(cpu, do_kvm_cpu_synchronize_state, RUN_ON_CPU_NULL); - } -} - -static void do_kvm_cpu_synchronize_post_reset(CPUState *cpu, run_on_cpu_data arg) -{ - kvm_arch_put_registers(cpu, KVM_PUT_RESET_STATE); - cpu->kvm_vcpu_dirty = false; -} - -void kvm_cpu_synchronize_post_reset(CPUState *cpu) -{ - run_on_cpu(cpu, do_kvm_cpu_synchronize_post_reset, RUN_ON_CPU_NULL); -} - -static void do_kvm_cpu_synchronize_post_init(CPUState *cpu, run_on_cpu_data arg) -{ - kvm_arch_put_registers(cpu, KVM_PUT_FULL_STATE); - cpu->kvm_vcpu_dirty = false; -} - -void kvm_cpu_synchronize_post_init(CPUState *cpu) -{ - run_on_cpu(cpu, do_kvm_cpu_synchronize_post_init, RUN_ON_CPU_NULL); -} - -static void do_kvm_cpu_synchronize_pre_loadvm(CPUState *cpu, run_on_cpu_data arg) -{ - cpu->kvm_vcpu_dirty = true; -} - -void kvm_cpu_synchronize_pre_loadvm(CPUState *cpu) -{ - run_on_cpu(cpu, do_kvm_cpu_synchronize_pre_loadvm, RUN_ON_CPU_NULL); -} - -#ifdef KVM_HAVE_MCE_INJECTION -static __thread void *pending_sigbus_addr; -static __thread int pending_sigbus_code; -static __thread bool have_sigbus_pending; -#endif - -static void kvm_cpu_kick(CPUState *cpu) -{ - atomic_set(&cpu->kvm_run->immediate_exit, 1); -} - -static void kvm_cpu_kick_self(void) -{ - if (kvm_immediate_exit) { - kvm_cpu_kick(current_cpu); - } else { - qemu_cpu_kick_self(); - } -} - -static void kvm_eat_signals(CPUState *cpu) -{ - struct timespec ts = { 0, 0 }; - siginfo_t siginfo; - sigset_t waitset; - sigset_t chkset; - int r; - - if (kvm_immediate_exit) { - atomic_set(&cpu->kvm_run->immediate_exit, 0); - /* Write kvm_run->immediate_exit before the cpu->exit_request - * write in kvm_cpu_exec. - */ - smp_wmb(); - return; - } - - sigemptyset(&waitset); - sigaddset(&waitset, SIG_IPI); - - do { - r = sigtimedwait(&waitset, &siginfo, &ts); - if (r == -1 && !(errno == EAGAIN || errno == EINTR)) { - perror("sigtimedwait"); - exit(1); - } - - r = sigpending(&chkset); - if (r == -1) { - perror("sigpending"); - exit(1); - } - } while (sigismember(&chkset, SIG_IPI)); -} - -int kvm_cpu_exec(CPUState *cpu) -{ - struct kvm_run *run = cpu->kvm_run; - int ret, run_ret; - - DPRINTF("kvm_cpu_exec()\n"); - - if (kvm_arch_process_async_events(cpu)) { - atomic_set(&cpu->exit_request, 0); - return EXCP_HLT; - } - - qemu_mutex_unlock_iothread(); - cpu_exec_start(cpu); - - do { - MemTxAttrs attrs; - - if (cpu->kvm_vcpu_dirty) { - kvm_arch_put_registers(cpu, KVM_PUT_RUNTIME_STATE); - cpu->kvm_vcpu_dirty = false; - } - - kvm_arch_pre_run(cpu, run); - if (atomic_read(&cpu->exit_request)) { - DPRINTF("interrupt exit requested\n"); - /* - * KVM requires us to reenter the kernel after IO exits to complete - * instruction emulation. This self-signal will ensure that we - * leave ASAP again. - */ - kvm_cpu_kick_self(); - } - - /* Read cpu->exit_request before KVM_RUN reads run->immediate_exit. - * Matching barrier in kvm_eat_signals. - */ - smp_rmb(); - - run_ret = kvm_vcpu_ioctl(cpu, KVM_RUN, 0); - - attrs = kvm_arch_post_run(cpu, run); - -#ifdef KVM_HAVE_MCE_INJECTION - if (unlikely(have_sigbus_pending)) { - qemu_mutex_lock_iothread(); - kvm_arch_on_sigbus_vcpu(cpu, pending_sigbus_code, - pending_sigbus_addr); - have_sigbus_pending = false; - qemu_mutex_unlock_iothread(); - } -#endif - - if (run_ret < 0) { - if (run_ret == -EINTR || run_ret == -EAGAIN) { - DPRINTF("io window exit\n"); - kvm_eat_signals(cpu); - ret = EXCP_INTERRUPT; - break; - } - fprintf(stderr, "error: kvm run failed %s\n", - strerror(-run_ret)); -#ifdef TARGET_PPC - if (run_ret == -EBUSY) { - fprintf(stderr, - "This is probably because your SMT is enabled.\n" - "VCPU can only run on primary threads with all " - "secondary threads offline.\n"); - } -#endif - ret = -1; - break; - } - - trace_kvm_run_exit(cpu->cpu_index, run->exit_reason); - switch (run->exit_reason) { - case KVM_EXIT_IO: - DPRINTF("handle_io\n"); - /* Called outside BQL */ - kvm_handle_io(run->io.port, attrs, - (uint8_t *)run + run->io.data_offset, - run->io.direction, - run->io.size, - run->io.count); - ret = 0; - break; - case KVM_EXIT_MMIO: - DPRINTF("handle_mmio\n"); - /* Called outside BQL */ - address_space_rw(&address_space_memory, - run->mmio.phys_addr, attrs, - run->mmio.data, - run->mmio.len, - run->mmio.is_write); - ret = 0; - break; - case KVM_EXIT_IRQ_WINDOW_OPEN: - DPRINTF("irq_window_open\n"); - ret = EXCP_INTERRUPT; - break; - case KVM_EXIT_SHUTDOWN: - DPRINTF("shutdown\n"); - qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET); - ret = EXCP_INTERRUPT; - break; - case KVM_EXIT_UNKNOWN: - fprintf(stderr, "KVM: unknown exit, hardware reason %" PRIx64 "\n", - (uint64_t)run->hw.hardware_exit_reason); - ret = -1; - break; - case KVM_EXIT_INTERNAL_ERROR: - ret = kvm_handle_internal_error(cpu, run); - break; - case KVM_EXIT_SYSTEM_EVENT: - switch (run->system_event.type) { - case KVM_SYSTEM_EVENT_SHUTDOWN: - qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN); - ret = EXCP_INTERRUPT; - break; - case KVM_SYSTEM_EVENT_RESET: - qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET); - ret = EXCP_INTERRUPT; - break; - case KVM_SYSTEM_EVENT_CRASH: - kvm_cpu_synchronize_state(cpu); - qemu_mutex_lock_iothread(); - qemu_system_guest_panicked(cpu_get_crash_info(cpu)); - qemu_mutex_unlock_iothread(); - ret = 0; - break; - default: - DPRINTF("kvm_arch_handle_exit\n"); - ret = kvm_arch_handle_exit(cpu, run); - break; - } - break; - default: - DPRINTF("kvm_arch_handle_exit\n"); - ret = kvm_arch_handle_exit(cpu, run); - break; - } - } while (ret == 0); - - cpu_exec_end(cpu); - qemu_mutex_lock_iothread(); - - if (ret < 0) { - cpu_dump_state(cpu, stderr, fprintf, CPU_DUMP_CODE); - vm_stop(RUN_STATE_INTERNAL_ERROR); - } - - atomic_set(&cpu->exit_request, 0); - return ret; -} - -int kvm_ioctl(KVMState *s, int type, ...) -{ - int ret; - void *arg; - va_list ap; - - va_start(ap, type); - arg = va_arg(ap, void *); - va_end(ap); - - trace_kvm_ioctl(type, arg); - ret = ioctl(s->fd, type, arg); - if (ret == -1) { - ret = -errno; - } - return ret; -} - -int kvm_vm_ioctl(KVMState *s, int type, ...) -{ - int ret; - void *arg; - va_list ap; - - va_start(ap, type); - arg = va_arg(ap, void *); - va_end(ap); - - trace_kvm_vm_ioctl(type, arg); - ret = ioctl(s->vmfd, type, arg); - if (ret == -1) { - ret = -errno; - } - return ret; -} - -int kvm_vcpu_ioctl(CPUState *cpu, int type, ...) -{ - int ret; - void *arg; - va_list ap; - - va_start(ap, type); - arg = va_arg(ap, void *); - va_end(ap); - - trace_kvm_vcpu_ioctl(cpu->cpu_index, type, arg); - ret = ioctl(cpu->kvm_fd, type, arg); - if (ret == -1) { - ret = -errno; - } - return ret; -} - -int kvm_device_ioctl(int fd, int type, ...) -{ - int ret; - void *arg; - va_list ap; - - va_start(ap, type); - arg = va_arg(ap, void *); - va_end(ap); - - trace_kvm_device_ioctl(fd, type, arg); - ret = ioctl(fd, type, arg); - if (ret == -1) { - ret = -errno; - } - return ret; -} - -int kvm_vm_check_attr(KVMState *s, uint32_t group, uint64_t attr) -{ - int ret; - struct kvm_device_attr attribute = { - .group = group, - .attr = attr, - }; - - if (!kvm_vm_attributes_allowed) { - return 0; - } - - ret = kvm_vm_ioctl(s, KVM_HAS_DEVICE_ATTR, &attribute); - /* kvm returns 0 on success for HAS_DEVICE_ATTR */ - return ret ? 0 : 1; -} - -int kvm_device_check_attr(int dev_fd, uint32_t group, uint64_t attr) -{ - struct kvm_device_attr attribute = { - .group = group, - .attr = attr, - .flags = 0, - }; - - return kvm_device_ioctl(dev_fd, KVM_HAS_DEVICE_ATTR, &attribute) ? 0 : 1; -} - -int kvm_device_access(int fd, int group, uint64_t attr, - void *val, bool write, Error **errp) -{ - struct kvm_device_attr kvmattr; - int err; - - kvmattr.flags = 0; - kvmattr.group = group; - kvmattr.attr = attr; - kvmattr.addr = (uintptr_t)val; - - err = kvm_device_ioctl(fd, - write ? KVM_SET_DEVICE_ATTR : KVM_GET_DEVICE_ATTR, - &kvmattr); - if (err < 0) { - error_setg_errno(errp, -err, - "KVM_%s_DEVICE_ATTR failed: Group %d " - "attr 0x%016" PRIx64, - write ? "SET" : "GET", group, attr); - } - return err; -} - -/* Return 1 on success, 0 on failure */ -int kvm_has_sync_mmu(void) -{ - return kvm_check_extension(kvm_state, KVM_CAP_SYNC_MMU); -} - -int kvm_has_vcpu_events(void) -{ - return kvm_state->vcpu_events; -} - -int kvm_has_robust_singlestep(void) -{ - return kvm_state->robust_singlestep; -} - -int kvm_has_debugregs(void) -{ - return kvm_state->debugregs; -} - -int kvm_has_many_ioeventfds(void) -{ - if (!kvm_enabled()) { - return 0; - } - return kvm_state->many_ioeventfds; -} - -int kvm_has_gsi_routing(void) -{ -#ifdef KVM_CAP_IRQ_ROUTING - return kvm_check_extension(kvm_state, KVM_CAP_IRQ_ROUTING); -#else - return false; -#endif -} - -int kvm_has_intx_set_mask(void) -{ - return kvm_state->intx_set_mask; -} - -#ifdef KVM_CAP_SET_GUEST_DEBUG -struct kvm_sw_breakpoint *kvm_find_sw_breakpoint(CPUState *cpu, - target_ulong pc) -{ - struct kvm_sw_breakpoint *bp; - - QTAILQ_FOREACH(bp, &cpu->kvm_state->kvm_sw_breakpoints, entry) { - if (bp->pc == pc) { - return bp; - } - } - return NULL; -} - -int kvm_sw_breakpoints_active(CPUState *cpu) -{ - return !QTAILQ_EMPTY(&cpu->kvm_state->kvm_sw_breakpoints); -} - -struct kvm_set_guest_debug_data { - struct kvm_guest_debug dbg; - int err; -}; - -static void kvm_invoke_set_guest_debug(CPUState *cpu, run_on_cpu_data data) -{ - struct kvm_set_guest_debug_data *dbg_data = - (struct kvm_set_guest_debug_data *) data.host_ptr; - - dbg_data->err = kvm_vcpu_ioctl(cpu, KVM_SET_GUEST_DEBUG, - &dbg_data->dbg); -} - -int kvm_update_guest_debug(CPUState *cpu, unsigned long reinject_trap) -{ - struct kvm_set_guest_debug_data data; - - data.dbg.control = reinject_trap; - - if (cpu->singlestep_enabled) { - data.dbg.control |= KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_SINGLESTEP; - } - kvm_arch_update_guest_debug(cpu, &data.dbg); - - run_on_cpu(cpu, kvm_invoke_set_guest_debug, - RUN_ON_CPU_HOST_PTR(&data)); - return data.err; -} - -int kvm_insert_breakpoint(CPUState *cpu, target_ulong addr, - target_ulong len, int type) -{ - struct kvm_sw_breakpoint *bp; - int err; - - if (type == GDB_BREAKPOINT_SW) { - bp = kvm_find_sw_breakpoint(cpu, addr); - if (bp) { - bp->use_count++; - return 0; - } - - bp = g_malloc(sizeof(struct kvm_sw_breakpoint)); - bp->pc = addr; - bp->use_count = 1; - err = kvm_arch_insert_sw_breakpoint(cpu, bp); - if (err) { - g_free(bp); - return err; - } - - QTAILQ_INSERT_HEAD(&cpu->kvm_state->kvm_sw_breakpoints, bp, entry); - } else { - err = kvm_arch_insert_hw_breakpoint(addr, len, type); - if (err) { - return err; - } - } - - CPU_FOREACH(cpu) { - err = kvm_update_guest_debug(cpu, 0); - if (err) { - return err; - } - } - return 0; -} - -int kvm_remove_breakpoint(CPUState *cpu, target_ulong addr, - target_ulong len, int type) -{ - struct kvm_sw_breakpoint *bp; - int err; - - if (type == GDB_BREAKPOINT_SW) { - bp = kvm_find_sw_breakpoint(cpu, addr); - if (!bp) { - return -ENOENT; - } - - if (bp->use_count > 1) { - bp->use_count--; - return 0; - } - - err = kvm_arch_remove_sw_breakpoint(cpu, bp); - if (err) { - return err; - } - - QTAILQ_REMOVE(&cpu->kvm_state->kvm_sw_breakpoints, bp, entry); - g_free(bp); - } else { - err = kvm_arch_remove_hw_breakpoint(addr, len, type); - if (err) { - return err; - } - } - - CPU_FOREACH(cpu) { - err = kvm_update_guest_debug(cpu, 0); - if (err) { - return err; - } - } - return 0; -} - -void kvm_remove_all_breakpoints(CPUState *cpu) -{ - struct kvm_sw_breakpoint *bp, *next; - KVMState *s = cpu->kvm_state; - CPUState *tmpcpu; - - QTAILQ_FOREACH_SAFE(bp, &s->kvm_sw_breakpoints, entry, next) { - if (kvm_arch_remove_sw_breakpoint(cpu, bp) != 0) { - /* Try harder to find a CPU that currently sees the breakpoint. */ - CPU_FOREACH(tmpcpu) { - if (kvm_arch_remove_sw_breakpoint(tmpcpu, bp) == 0) { - break; - } - } - } - QTAILQ_REMOVE(&s->kvm_sw_breakpoints, bp, entry); - g_free(bp); - } - kvm_arch_remove_all_hw_breakpoints(); - - CPU_FOREACH(cpu) { - kvm_update_guest_debug(cpu, 0); - } -} - -#else /* !KVM_CAP_SET_GUEST_DEBUG */ - -int kvm_update_guest_debug(CPUState *cpu, unsigned long reinject_trap) -{ - return -EINVAL; -} - -int kvm_insert_breakpoint(CPUState *cpu, target_ulong addr, - target_ulong len, int type) -{ - return -EINVAL; -} - -int kvm_remove_breakpoint(CPUState *cpu, target_ulong addr, - target_ulong len, int type) -{ - return -EINVAL; -} - -void kvm_remove_all_breakpoints(CPUState *cpu) -{ -} -#endif /* !KVM_CAP_SET_GUEST_DEBUG */ - -static int kvm_set_signal_mask(CPUState *cpu, const sigset_t *sigset) -{ - KVMState *s = kvm_state; - struct kvm_signal_mask *sigmask; - int r; - - sigmask = g_malloc(sizeof(*sigmask) + sizeof(*sigset)); - - sigmask->len = s->sigmask_len; - memcpy(sigmask->sigset, sigset, sizeof(*sigset)); - r = kvm_vcpu_ioctl(cpu, KVM_SET_SIGNAL_MASK, sigmask); - g_free(sigmask); - - return r; -} - -static void kvm_ipi_signal(int sig) -{ - if (current_cpu) { - assert(kvm_immediate_exit); - kvm_cpu_kick(current_cpu); - } -} - -void kvm_init_cpu_signals(CPUState *cpu) -{ - int r; - sigset_t set; - struct sigaction sigact; - - memset(&sigact, 0, sizeof(sigact)); - sigact.sa_handler = kvm_ipi_signal; - sigaction(SIG_IPI, &sigact, NULL); - - pthread_sigmask(SIG_BLOCK, NULL, &set); -#if defined KVM_HAVE_MCE_INJECTION - sigdelset(&set, SIGBUS); - pthread_sigmask(SIG_SETMASK, &set, NULL); -#endif - sigdelset(&set, SIG_IPI); - if (kvm_immediate_exit) { - r = pthread_sigmask(SIG_SETMASK, &set, NULL); - } else { - r = kvm_set_signal_mask(cpu, &set); - } - if (r) { - fprintf(stderr, "kvm_set_signal_mask: %s\n", strerror(-r)); - exit(1); - } -} - -/* Called asynchronously in VCPU thread. */ -int kvm_on_sigbus_vcpu(CPUState *cpu, int code, void *addr) -{ -#ifdef KVM_HAVE_MCE_INJECTION - if (have_sigbus_pending) { - return 1; - } - have_sigbus_pending = true; - pending_sigbus_addr = addr; - pending_sigbus_code = code; - atomic_set(&cpu->exit_request, 1); - return 0; -#else - return 1; -#endif -} - -/* Called synchronously (via signalfd) in main thread. */ -int kvm_on_sigbus(int code, void *addr) -{ -#ifdef KVM_HAVE_MCE_INJECTION - /* Action required MCE kills the process if SIGBUS is blocked. Because - * that's what happens in the I/O thread, where we handle MCE via signalfd, - * we can only get action optional here. - */ - assert(code != BUS_MCEERR_AR); - kvm_arch_on_sigbus_vcpu(first_cpu, code, addr); - return 0; -#else - return 1; -#endif -} - -int kvm_create_device(KVMState *s, uint64_t type, bool test) -{ - int ret; - struct kvm_create_device create_dev; - - create_dev.type = type; - create_dev.fd = -1; - create_dev.flags = test ? KVM_CREATE_DEVICE_TEST : 0; - - if (!kvm_check_extension(s, KVM_CAP_DEVICE_CTRL)) { - return -ENOTSUP; - } - - ret = kvm_vm_ioctl(s, KVM_CREATE_DEVICE, &create_dev); - if (ret) { - return ret; - } - - return test ? 0 : create_dev.fd; -} - -bool kvm_device_supported(int vmfd, uint64_t type) -{ - struct kvm_create_device create_dev = { - .type = type, - .fd = -1, - .flags = KVM_CREATE_DEVICE_TEST, - }; - - if (ioctl(vmfd, KVM_CHECK_EXTENSION, KVM_CAP_DEVICE_CTRL) <= 0) { - return false; - } - - return (ioctl(vmfd, KVM_CREATE_DEVICE, &create_dev) >= 0); -} - -int kvm_set_one_reg(CPUState *cs, uint64_t id, void *source) -{ - struct kvm_one_reg reg; - int r; - - reg.id = id; - reg.addr = (uintptr_t) source; - r = kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, ®); - if (r) { - trace_kvm_failed_reg_set(id, strerror(-r)); - } - return r; -} - -int kvm_get_one_reg(CPUState *cs, uint64_t id, void *target) -{ - struct kvm_one_reg reg; - int r; - - reg.id = id; - reg.addr = (uintptr_t) target; - r = kvm_vcpu_ioctl(cs, KVM_GET_ONE_REG, ®); - if (r) { - trace_kvm_failed_reg_get(id, strerror(-r)); - } - return r; -} - -static void kvm_accel_class_init(ObjectClass *oc, void *data) -{ - AccelClass *ac = ACCEL_CLASS(oc); - ac->name = "KVM"; - ac->init_machine = kvm_init; - ac->allowed = &kvm_allowed; -} - -static const TypeInfo kvm_accel_type = { - .name = TYPE_KVM_ACCEL, - .parent = TYPE_ACCEL, - .class_init = kvm_accel_class_init, - .instance_size = sizeof(KVMState), -}; - -static void kvm_type_init(void) -{ - type_register_static(&kvm_accel_type); -} - -type_init(kvm_type_init); diff --git a/kvm-stub.c b/kvm-stub.c deleted file mode 100644 index ef0c7346af..0000000000 --- a/kvm-stub.c +++ /dev/null @@ -1,158 +0,0 @@ -/* - * QEMU KVM stub - * - * Copyright Red Hat, Inc. 2010 - * - * Author: Paolo Bonzini - * - * This work is licensed under the terms of the GNU GPL, version 2 or later. - * See the COPYING file in the top-level directory. - * - */ - -#include "qemu/osdep.h" -#include "qemu-common.h" -#include "cpu.h" -#include "sysemu/kvm.h" - -#ifndef CONFIG_USER_ONLY -#include "hw/pci/msi.h" -#endif - -KVMState *kvm_state; -bool kvm_kernel_irqchip; -bool kvm_async_interrupts_allowed; -bool kvm_eventfds_allowed; -bool kvm_irqfds_allowed; -bool kvm_resamplefds_allowed; -bool kvm_msi_via_irqfd_allowed; -bool kvm_gsi_routing_allowed; -bool kvm_gsi_direct_mapping; -bool kvm_allowed; -bool kvm_readonly_mem_allowed; -bool kvm_ioeventfd_any_length_allowed; -bool kvm_msi_use_devid; - -int kvm_destroy_vcpu(CPUState *cpu) -{ - return -ENOSYS; -} - -int kvm_init_vcpu(CPUState *cpu) -{ - return -ENOSYS; -} - -void kvm_flush_coalesced_mmio_buffer(void) -{ -} - -void kvm_cpu_synchronize_state(CPUState *cpu) -{ -} - -void kvm_cpu_synchronize_post_reset(CPUState *cpu) -{ -} - -void kvm_cpu_synchronize_post_init(CPUState *cpu) -{ -} - -int kvm_cpu_exec(CPUState *cpu) -{ - abort(); -} - -int kvm_has_sync_mmu(void) -{ - return 0; -} - -int kvm_has_many_ioeventfds(void) -{ - return 0; -} - -int kvm_update_guest_debug(CPUState *cpu, unsigned long reinject_trap) -{ - return -ENOSYS; -} - -int kvm_insert_breakpoint(CPUState *cpu, target_ulong addr, - target_ulong len, int type) -{ - return -EINVAL; -} - -int kvm_remove_breakpoint(CPUState *cpu, target_ulong addr, - target_ulong len, int type) -{ - return -EINVAL; -} - -void kvm_remove_all_breakpoints(CPUState *cpu) -{ -} - -int kvm_on_sigbus_vcpu(CPUState *cpu, int code, void *addr) -{ - return 1; -} - -int kvm_on_sigbus(int code, void *addr) -{ - return 1; -} - -#ifndef CONFIG_USER_ONLY -int kvm_irqchip_add_msi_route(KVMState *s, int vector, PCIDevice *dev) -{ - return -ENOSYS; -} - -void kvm_init_irq_routing(KVMState *s) -{ -} - -void kvm_irqchip_release_virq(KVMState *s, int virq) -{ -} - -int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg, - PCIDevice *dev) -{ - return -ENOSYS; -} - -void kvm_irqchip_commit_routes(KVMState *s) -{ -} - -int kvm_irqchip_add_adapter_route(KVMState *s, AdapterInfo *adapter) -{ - return -ENOSYS; -} - -int kvm_irqchip_add_irqfd_notifier_gsi(KVMState *s, EventNotifier *n, - EventNotifier *rn, int virq) -{ - return -ENOSYS; -} - -int kvm_irqchip_remove_irqfd_notifier_gsi(KVMState *s, EventNotifier *n, - int virq) -{ - return -ENOSYS; -} - -bool kvm_has_free_slot(MachineState *ms) -{ - return false; -} - -void kvm_init_cpu_signals(CPUState *cpu) -{ - abort(); -} -#endif diff --git a/trace-events b/trace-events index 62d8100c8d..bae63fdb1d 100644 --- a/trace-events +++ b/trace-events @@ -55,19 +55,6 @@ dma_complete(void *dbs, int ret, void *cb) "dbs=%p ret=%d cb=%p" dma_blk_cb(void *dbs, int ret) "dbs=%p ret=%d" dma_map_wait(void *dbs) "dbs=%p" -# kvm-all.c -kvm_ioctl(int type, void *arg) "type 0x%x, arg %p" -kvm_vm_ioctl(int type, void *arg) "type 0x%x, arg %p" -kvm_vcpu_ioctl(int cpu_index, int type, void *arg) "cpu_index %d, type 0x%x, arg %p" -kvm_run_exit(int cpu_index, uint32_t reason) "cpu_index %d, reason %d" -kvm_device_ioctl(int fd, int type, void *arg) "dev fd %d, type 0x%x, arg %p" -kvm_failed_reg_get(uint64_t id, const char *msg) "Warning: Unable to retrieve ONEREG %" PRIu64 " from KVM: %s" -kvm_failed_reg_set(uint64_t id, const char *msg) "Warning: Unable to set ONEREG %" PRIu64 " to KVM: %s" -kvm_irqchip_commit_routes(void) "" -kvm_irqchip_add_msi_route(char *name, int vector, int virq) "dev %s vector %d virq %d" -kvm_irqchip_update_msi_route(int virq) "Updating MSI route virq=%d" -kvm_irqchip_release_virq(int virq) "virq %d" - # memory.c memory_region_ops_read(int cpu_index, void *mr, uint64_t addr, uint64_t value, unsigned size) "cpu %d mr %p addr %#"PRIx64" value %#"PRIx64" size %u" memory_region_ops_write(int cpu_index, void *mr, uint64_t addr, uint64_t value, unsigned size) "cpu %d mr %p addr %#"PRIx64" value %#"PRIx64" size %u" -- cgit v1.2.1