From b05c81d292be96e27bd61ed1f67d313eafbda4d9 Mon Sep 17 00:00:00 2001 From: Eric Auger Date: Fri, 4 May 2018 18:05:52 +0100 Subject: target/arm/kvm: Translate the MSI doorbell in kvm_arch_fixup_msi_route In case the MSI is translated by an IOMMU we need to fixup the MSI route with the translated address. Signed-off-by: Eric Auger Signed-off-by: Bharat Bhushan Message-id: 1524665762-31355-12-git-send-email-eric.auger@redhat.com Reviewed-by: Peter Maydell Signed-off-by: Peter Maydell --- target/arm/kvm.c | 38 +++++++++++++++++++++++++++++++++++++- target/arm/trace-events | 3 +++ 2 files changed, 40 insertions(+), 1 deletion(-) diff --git a/target/arm/kvm.c b/target/arm/kvm.c index ecc39ac295..5141d0adc5 100644 --- a/target/arm/kvm.c +++ b/target/arm/kvm.c @@ -20,8 +20,10 @@ #include "sysemu/kvm.h" #include "kvm_arm.h" #include "cpu.h" +#include "trace.h" #include "internals.h" #include "hw/arm/arm.h" +#include "hw/pci/pci.h" #include "exec/memattrs.h" #include "exec/address-spaces.h" #include "hw/boards.h" @@ -649,7 +651,41 @@ int kvm_arm_vgic_probe(void) int kvm_arch_fixup_msi_route(struct kvm_irq_routing_entry *route, uint64_t address, uint32_t data, PCIDevice *dev) { - return 0; + AddressSpace *as = pci_device_iommu_address_space(dev); + hwaddr xlat, len, doorbell_gpa; + MemoryRegionSection mrs; + MemoryRegion *mr; + int ret = 1; + + if (as == &address_space_memory) { + return 0; + } + + /* MSI doorbell address is translated by an IOMMU */ + + rcu_read_lock(); + mr = address_space_translate(as, address, &xlat, &len, true); + if (!mr) { + goto unlock; + } + mrs = memory_region_find(mr, xlat, 1); + if (!mrs.mr) { + goto unlock; + } + + doorbell_gpa = mrs.offset_within_address_space; + memory_region_unref(mrs.mr); + + route->u.msi.address_lo = doorbell_gpa; + route->u.msi.address_hi = doorbell_gpa >> 32; + + trace_kvm_arm_fixup_msi_route(address, doorbell_gpa); + + ret = 0; + +unlock: + rcu_read_unlock(); + return ret; } int kvm_arch_add_msi_route_post(struct kvm_irq_routing_entry *route, diff --git a/target/arm/trace-events b/target/arm/trace-events index 9e37131115..6b759f9d4f 100644 --- a/target/arm/trace-events +++ b/target/arm/trace-events @@ -8,3 +8,6 @@ arm_gt_tval_write(int timer, uint64_t value) "gt_tval_write: timer %d value 0x%" arm_gt_ctl_write(int timer, uint64_t value) "gt_ctl_write: timer %d value 0x%" PRIx64 arm_gt_imask_toggle(int timer, int irqstate) "gt_ctl_write: timer %d IMASK toggle, new irqstate %d" arm_gt_cntvoff_write(uint64_t value) "gt_cntvoff_write: value 0x%" PRIx64 + +# target/arm/kvm.c +kvm_arm_fixup_msi_route(uint64_t iova, uint64_t gpa) "MSI iova = 0x%"PRIx64" is translated into 0x%"PRIx64 -- cgit v1.2.1