Unbreak large mem support by removing kqemu

kqemu introduces a number of restrictions on the i386 target.  The worst is that
it prevents large memory from working in the default build.

Furthermore, kqemu is fundamentally flawed in a number of ways.  It relies on
the TSC as a time source which will not be reliable on a multiple processor
system in userspace.  Since most modern processors are multicore, this severely
limits the utility of kqemu.

kvm is a viable alternative for people looking to accelerate qemu and has the
benefit of being supported by the upstream Linux kernel.  If someone can
implement work arounds to remove the restrictions introduced by kqemu, I'm
happy to avoid and/or revert this patch.

N.B. kqemu will still function in the 0.11 series but this patch removes it from
the 0.12 series.

Paul, please Ack or Nack this patch.

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

1 files changed, 0 insertions, 154 deletions

diff --git a/kqemu.h b/kqemu.h
deleted file mode 100644
index ed25c7546b..0000000000
--- a/kqemu.h
+++ /dev/null
@@ -1,154 +0,0 @@
-/*
- * KQEMU header
- * 
- * Copyright (c) 2004-2008 Fabrice Bellard
- * 
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- * THE SOFTWARE.
- */
-#ifndef KQEMU_H
-#define KQEMU_H
-
-#if defined(__i386__)
-#define KQEMU_PAD32(x) x
-#else
-#define KQEMU_PAD32(x)
-#endif
-
-#define KQEMU_VERSION 0x010400
-
-struct kqemu_segment_cache {
-    uint16_t selector;
-    uint16_t padding1;
-    uint32_t flags;
-    uint64_t base;
-    uint32_t limit;
-    uint32_t padding2;
-};
-
-struct kqemu_cpu_state {
-    uint64_t regs[16];
-    uint64_t eip;
-    uint64_t eflags;
-
-    struct kqemu_segment_cache segs[6]; /* selector values */
-    struct kqemu_segment_cache ldt;
-    struct kqemu_segment_cache tr;
-    struct kqemu_segment_cache gdt; /* only base and limit are used */
-    struct kqemu_segment_cache idt; /* only base and limit are used */
-
-    uint64_t cr0;
-    uint64_t cr2;
-    uint64_t cr3;
-    uint64_t cr4;
-    uint64_t a20_mask;
-
-    /* sysenter registers */
-    uint64_t sysenter_cs;
-    uint64_t sysenter_esp;
-    uint64_t sysenter_eip;
-    uint64_t efer;
-    uint64_t star;
-    
-    uint64_t lstar;
-    uint64_t cstar;
-    uint64_t fmask;
-    uint64_t kernelgsbase;
-
-    uint64_t tsc_offset;
-
-    uint64_t dr0;
-    uint64_t dr1;
-    uint64_t dr2;
-    uint64_t dr3;
-    uint64_t dr6;
-    uint64_t dr7;
-
-    uint8_t cpl;
-    uint8_t user_only;
-    uint16_t padding1;
-
-    uint32_t error_code; /* error_code when exiting with an exception */
-    uint64_t next_eip; /* next eip value when exiting with an interrupt */
-    uint32_t nb_pages_to_flush; /* number of pages to flush,
-                                       KQEMU_FLUSH_ALL means full flush */
-#define KQEMU_MAX_PAGES_TO_FLUSH 512
-#define KQEMU_FLUSH_ALL (KQEMU_MAX_PAGES_TO_FLUSH + 1)
-
-    int32_t retval;
-
-    /* number of ram_dirty entries to update */
-    uint32_t nb_ram_pages_to_update; 
-#define KQEMU_MAX_RAM_PAGES_TO_UPDATE 512
-#define KQEMU_RAM_PAGES_UPDATE_ALL (KQEMU_MAX_RAM_PAGES_TO_UPDATE + 1)
-
-#define KQEMU_MAX_MODIFIED_RAM_PAGES 512
-    uint32_t nb_modified_ram_pages;
-};
-
-struct kqemu_init {
-    uint8_t *ram_base; /* must be page aligned */
-    KQEMU_PAD32(uint32_t padding1;)
-    uint64_t ram_size; /* must be multiple of 4 KB */
-    uint8_t *ram_dirty; /* must be page aligned */
-    KQEMU_PAD32(uint32_t padding2;)
-    uint64_t *pages_to_flush; /* must be page aligned */
-    KQEMU_PAD32(uint32_t padding4;)
-    uint64_t *ram_pages_to_update; /* must be page aligned */
-    KQEMU_PAD32(uint32_t padding5;)
-    uint64_t *modified_ram_pages; /* must be page aligned */
-    KQEMU_PAD32(uint32_t padding6;)
-};
-
-#define KQEMU_IO_MEM_RAM        0
-#define KQEMU_IO_MEM_ROM        1
-#define KQEMU_IO_MEM_COMM       2 /* kqemu communication page */
-#define KQEMU_IO_MEM_UNASSIGNED 3 /* any device: return to application */
-
-struct kqemu_phys_mem {
-    uint64_t phys_addr; /* physical address range: phys_addr,
-                           phys_addr + size */
-    uint64_t size;        
-    uint64_t ram_addr;  /* corresponding ram address */
-    uint32_t io_index;  /* memory type: see KQEMU_IO_MEM_xxx */
-    uint32_t padding1;
-};
-
-#define KQEMU_RET_ABORT    (-1)
-#define KQEMU_RET_EXCEPTION 0x0000 /* 8 low order bit are the exception */
-#define KQEMU_RET_INT       0x0100 /* 8 low order bit are the interrupt */
-#define KQEMU_RET_SOFTMMU   0x0200 /* emulation needed (I/O or
-                                      unsupported INSN) */
-#define KQEMU_RET_INTR      0x0201 /* interrupted by a signal */
-#define KQEMU_RET_SYSCALL   0x0300 /* syscall insn */
-
-#ifdef _WIN32
-#define KQEMU_EXEC             CTL_CODE(FILE_DEVICE_UNKNOWN, 1, METHOD_BUFFERED, FILE_READ_ACCESS | FILE_WRITE_ACCESS)
-#define KQEMU_INIT             CTL_CODE(FILE_DEVICE_UNKNOWN, 2, METHOD_BUFFERED, FILE_WRITE_ACCESS)
-#define KQEMU_GET_VERSION      CTL_CODE(FILE_DEVICE_UNKNOWN, 3, METHOD_BUFFERED, FILE_READ_ACCESS)
-#define KQEMU_MODIFY_RAM_PAGES CTL_CODE(FILE_DEVICE_UNKNOWN, 4, METHOD_BUFFERED, FILE_WRITE_ACCESS)
-#define KQEMU_SET_PHYS_MEM     CTL_CODE(FILE_DEVICE_UNKNOWN, 5, METHOD_BUFFERED, FILE_WRITE_ACCESS)
-#else
-#define KQEMU_EXEC             _IOWR('q', 1, struct kqemu_cpu_state)
-#define KQEMU_INIT             _IOW('q', 2, struct kqemu_init)
-#define KQEMU_GET_VERSION      _IOR('q', 3, int)
-#define KQEMU_MODIFY_RAM_PAGES _IOW('q', 4, int)
-#define KQEMU_SET_PHYS_MEM     _IOW('q', 5, struct kqemu_phys_mem)
-#endif
-
-#endif /* KQEMU_H */