[Qemu-commits] [COMMIT 4e02cd3] Remove kqemu.c accidentally added byd60efc6b0d3d4e90cbbb86e21451e55263c29416

[Anthony Liguori]

From: Blue Swirl <address@hidden>

Signed-off-by: Blue Swirl <address@hidden>

diff --git a/kqemu.c b/kqemu.c
deleted file mode 100644
index 697c55b..0000000
--- a/kqemu.c
+++ /dev/null
@@ -1,998 +0,0 @@
-/*
- *  KQEMU support
- *
- *  Copyright (c) 2005-2008 Fabrice Bellard
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, see <http://www.gnu.org/licenses/>.
- */
-#include "config.h"
-#ifdef _WIN32
-#include <windows.h>
-#include <winioctl.h>
-#else
-#include <sys/types.h>
-#include <sys/mman.h>
-#include <sys/ioctl.h>
-#endif
-#ifdef CONFIG_SOLARIS
-#include <sys/ioccom.h>
-#endif
-#include <stdlib.h>
-#include <stdio.h>
-#include <stdarg.h>
-#include <string.h>
-#include <errno.h>
-#include <unistd.h>
-#include <inttypes.h>
-
-#include "cpu.h"
-#include "exec-all.h"
-#include "qemu-common.h"
-
-#ifdef CONFIG_KQEMU
-
-#define DEBUG
-//#define PROFILE
-
-
-#ifdef DEBUG
-#  define LOG_INT(...) qemu_log_mask(CPU_LOG_INT, ## __VA_ARGS__)
-#  define LOG_INT_STATE(env) log_cpu_state_mask(CPU_LOG_INT, (env), 0)
-#else
-#  define LOG_INT(...) do { } while (0)
-#  define LOG_INT_STATE(env) do { } while (0)
-#endif
-
-#include <unistd.h>
-#include <fcntl.h>
-#include "kqemu.h"
-
-#ifdef _WIN32
-#define KQEMU_DEVICE "\\\\.\\kqemu"
-#else
-#define KQEMU_DEVICE "/dev/kqemu"
-#endif
-
-static void qpi_init(void);
-
-#ifdef _WIN32
-#define KQEMU_INVALID_FD INVALID_HANDLE_VALUE
-HANDLE kqemu_fd = KQEMU_INVALID_FD;
-#define kqemu_closefd(x) CloseHandle(x)
-#else
-#define KQEMU_INVALID_FD -1
-int kqemu_fd = KQEMU_INVALID_FD;
-#define kqemu_closefd(x) close(x)
-#endif
-
-/* 0 = not allowed
-   1 = user kqemu
-   2 = kernel kqemu
-*/
-int kqemu_allowed = 0;
-uint64_t *pages_to_flush;
-unsigned int nb_pages_to_flush;
-uint64_t *ram_pages_to_update;
-unsigned int nb_ram_pages_to_update;
-uint64_t *modified_ram_pages;
-unsigned int nb_modified_ram_pages;
-uint8_t *modified_ram_pages_table;
-int qpi_io_memory;
-uint32_t kqemu_comm_base; /* physical address of the QPI communication page */
-ram_addr_t kqemu_phys_ram_size;
-uint8_t *kqemu_phys_ram_base;
-
-#define cpuid(index, eax, ebx, ecx, edx) \
-  asm volatile ("cpuid" \
-                : "=a" (eax), "=b" (ebx), "=c" (ecx), "=d" (edx) \
-                : "0" (index))
-
-#ifdef __x86_64__
-static int is_cpuid_supported(void)
-{
-    return 1;
-}
-#else
-static int is_cpuid_supported(void)
-{
-    int v0, v1;
-    asm volatile ("pushf\n"
-                  "popl %0\n"
-                  "movl %0, %1\n"
-                  "xorl $0x00200000, %0\n"
-                  "pushl %0\n"
-                  "popf\n"
-                  "pushf\n"
-                  "popl %0\n"
-                  : "=a" (v0), "=d" (v1)
-                  :
-                  : "cc");
-    return (v0 != v1);
-}
-#endif
-
-static void kqemu_update_cpuid(CPUState *env)
-{
-    int critical_features_mask, features, ext_features, ext_features_mask;
-    uint32_t eax, ebx, ecx, edx;
-
-    /* the following features are kept identical on the host and
-       target cpus because they are important for user code. Strictly
-       speaking, only SSE really matters because the OS must support
-       it if the user code uses it. */
-    critical_features_mask =
-        CPUID_CMOV | CPUID_CX8 |
-        CPUID_FXSR | CPUID_MMX | CPUID_SSE |
-        CPUID_SSE2 | CPUID_SEP;
-    ext_features_mask = CPUID_EXT_SSE3 | CPUID_EXT_MONITOR;
-    if (!is_cpuid_supported()) {
-        features = 0;
-        ext_features = 0;
-    } else {
-        cpuid(1, eax, ebx, ecx, edx);
-        features = edx;
-        ext_features = ecx;
-    }
-#ifdef __x86_64__
-    /* NOTE: on x86_64 CPUs, SYSENTER is not supported in
-       compatibility mode, so in order to have the best performances
-       it is better not to use it */
-    features &= ~CPUID_SEP;
-#endif
-    env->cpuid_features = (env->cpuid_features & ~critical_features_mask) |
-        (features & critical_features_mask);
-    env->cpuid_ext_features = (env->cpuid_ext_features & ~ext_features_mask) |
-        (ext_features & ext_features_mask);
-    /* XXX: we could update more of the target CPUID state so that the
-       non accelerated code sees exactly the same CPU features as the
-       accelerated code */
-}
-
-int kqemu_init(CPUState *env)
-{
-    struct kqemu_init kinit;
-    int ret, version;
-#ifdef _WIN32
-    DWORD temp;
-#endif
-
-    if (!kqemu_allowed)
-        return -1;
-
-#ifdef _WIN32
-    kqemu_fd = CreateFile(KQEMU_DEVICE, GENERIC_WRITE | GENERIC_READ,
-                          FILE_SHARE_READ | FILE_SHARE_WRITE,
-                          NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL,
-                          NULL);
-    if (kqemu_fd == KQEMU_INVALID_FD) {
-        fprintf(stderr, "Could not open '%s' - QEMU acceleration layer not 
activated: %lu\n",
-                KQEMU_DEVICE, GetLastError());
-        return -1;
-    }
-#else
-    kqemu_fd = open(KQEMU_DEVICE, O_RDWR);
-    if (kqemu_fd == KQEMU_INVALID_FD) {
-        fprintf(stderr, "Could not open '%s' - QEMU acceleration layer not 
activated: %s\n",
-                KQEMU_DEVICE, strerror(errno));
-        return -1;
-    }
-#endif
-    version = 0;
-#ifdef _WIN32
-    DeviceIoControl(kqemu_fd, KQEMU_GET_VERSION, NULL, 0,
-                    &version, sizeof(version), &temp, NULL);
-#else
-    ioctl(kqemu_fd, KQEMU_GET_VERSION, &version);
-#endif
-    if (version != KQEMU_VERSION) {
-        fprintf(stderr, "Version mismatch between kqemu module and qemu (%08x 
%08x) - disabling kqemu use\n",
-                version, KQEMU_VERSION);
-        goto fail;
-    }
-
-    pages_to_flush = qemu_vmalloc(KQEMU_MAX_PAGES_TO_FLUSH *
-                                  sizeof(uint64_t));
-    if (!pages_to_flush)
-        goto fail;
-
-    ram_pages_to_update = qemu_vmalloc(KQEMU_MAX_RAM_PAGES_TO_UPDATE *
-                                       sizeof(uint64_t));
-    if (!ram_pages_to_update)
-        goto fail;
-
-    modified_ram_pages = qemu_vmalloc(KQEMU_MAX_MODIFIED_RAM_PAGES *
-                                      sizeof(uint64_t));
-    if (!modified_ram_pages)
-        goto fail;
-    modified_ram_pages_table =
-        qemu_mallocz(kqemu_phys_ram_size >> TARGET_PAGE_BITS);
-    if (!modified_ram_pages_table)
-        goto fail;
-
-    memset(&kinit, 0, sizeof(kinit)); /* set the paddings to zero */
-    kinit.ram_base = kqemu_phys_ram_base;
-    kinit.ram_size = kqemu_phys_ram_size;
-    kinit.ram_dirty = phys_ram_dirty;
-    kinit.pages_to_flush = pages_to_flush;
-    kinit.ram_pages_to_update = ram_pages_to_update;
-    kinit.modified_ram_pages = modified_ram_pages;
-#ifdef _WIN32
-    ret = DeviceIoControl(kqemu_fd, KQEMU_INIT, &kinit, sizeof(kinit),
-                          NULL, 0, &temp, NULL) == TRUE ? 0 : -1;
-#else
-    ret = ioctl(kqemu_fd, KQEMU_INIT, &kinit);
-#endif
-    if (ret < 0) {
-        fprintf(stderr, "Error %d while initializing QEMU acceleration layer - 
disabling it for now\n", ret);
-    fail:
-        kqemu_closefd(kqemu_fd);
-        kqemu_fd = KQEMU_INVALID_FD;
-        return -1;
-    }
-    kqemu_update_cpuid(env);
-    env->kqemu_enabled = kqemu_allowed;
-    nb_pages_to_flush = 0;
-    nb_ram_pages_to_update = 0;
-
-    qpi_init();
-    return 0;
-}
-
-void kqemu_flush_page(CPUState *env, target_ulong addr)
-{
-    LOG_INT("kqemu_flush_page: addr=" TARGET_FMT_lx "\n", addr);
-    if (nb_pages_to_flush >= KQEMU_MAX_PAGES_TO_FLUSH)
-        nb_pages_to_flush = KQEMU_FLUSH_ALL;
-    else
-        pages_to_flush[nb_pages_to_flush++] = addr;
-}
-
-void kqemu_flush(CPUState *env, int global)
-{
-    LOG_INT("kqemu_flush:\n");
-    nb_pages_to_flush = KQEMU_FLUSH_ALL;
-}
-
-void kqemu_set_notdirty(CPUState *env, ram_addr_t ram_addr)
-{
-    LOG_INT("kqemu_set_notdirty: addr=%08lx\n",
-                (unsigned long)ram_addr);
-    /* we only track transitions to dirty state */
-    if (phys_ram_dirty[ram_addr >> TARGET_PAGE_BITS] != 0xff)
-        return;
-    if (nb_ram_pages_to_update >= KQEMU_MAX_RAM_PAGES_TO_UPDATE)
-        nb_ram_pages_to_update = KQEMU_RAM_PAGES_UPDATE_ALL;
-    else
-        ram_pages_to_update[nb_ram_pages_to_update++] = ram_addr;
-}
-
-static void kqemu_reset_modified_ram_pages(void)
-{
-    int i;
-    unsigned long page_index;
-
-    for(i = 0; i < nb_modified_ram_pages; i++) {
-        page_index = modified_ram_pages[i] >> TARGET_PAGE_BITS;
-        modified_ram_pages_table[page_index] = 0;
-    }
-    nb_modified_ram_pages = 0;
-}
-
-void kqemu_modify_page(CPUState *env, ram_addr_t ram_addr)
-{
-    unsigned long page_index;
-    int ret;
-#ifdef _WIN32
-    DWORD temp;
-#endif
-
-    page_index = ram_addr >> TARGET_PAGE_BITS;
-    if (!modified_ram_pages_table[page_index]) {
-#if 0
-        printf("%d: modify_page=%08lx\n", nb_modified_ram_pages, ram_addr);
-#endif
-        modified_ram_pages_table[page_index] = 1;
-        modified_ram_pages[nb_modified_ram_pages++] = ram_addr;
-        if (nb_modified_ram_pages >= KQEMU_MAX_MODIFIED_RAM_PAGES) {
-            /* flush */
-#ifdef _WIN32
-            ret = DeviceIoControl(kqemu_fd, KQEMU_MODIFY_RAM_PAGES,
-                                  &nb_modified_ram_pages,
-                                  sizeof(nb_modified_ram_pages),
-                                  NULL, 0, &temp, NULL);
-#else
-            ret = ioctl(kqemu_fd, KQEMU_MODIFY_RAM_PAGES,
-                        &nb_modified_ram_pages);
-#endif
-            kqemu_reset_modified_ram_pages();
-        }
-    }
-}
-
-void kqemu_set_phys_mem(uint64_t start_addr, ram_addr_t size,
-                        ram_addr_t phys_offset)
-{
-    struct kqemu_phys_mem kphys_mem1, *kphys_mem = &kphys_mem1;
-    uint64_t end;
-    int ret, io_index;
-
-    end = (start_addr + size + TARGET_PAGE_SIZE - 1) & TARGET_PAGE_MASK;
-    start_addr &= TARGET_PAGE_MASK;
-    kphys_mem->phys_addr = start_addr;
-    kphys_mem->size = end - start_addr;
-    kphys_mem->ram_addr = phys_offset & TARGET_PAGE_MASK;
-    io_index = phys_offset & ~TARGET_PAGE_MASK;
-    switch(io_index) {
-    case IO_MEM_RAM:
-        kphys_mem->io_index = KQEMU_IO_MEM_RAM;
-        break;
-    case IO_MEM_ROM:
-        kphys_mem->io_index = KQEMU_IO_MEM_ROM;
-        break;
-    default:
-        if (qpi_io_memory == io_index) {
-            kphys_mem->io_index = KQEMU_IO_MEM_COMM;
-        } else {
-            kphys_mem->io_index = KQEMU_IO_MEM_UNASSIGNED;
-        }
-        break;
-    }
-#ifdef _WIN32
-    {
-        DWORD temp;
-        ret = DeviceIoControl(kqemu_fd, KQEMU_SET_PHYS_MEM,
-                              kphys_mem, sizeof(*kphys_mem),
-                              NULL, 0, &temp, NULL) == TRUE ? 0 : -1;
-    }
-#else
-    ret = ioctl(kqemu_fd, KQEMU_SET_PHYS_MEM, kphys_mem);
-#endif
-    if (ret < 0) {
-        fprintf(stderr, "kqemu: KQEMU_SET_PHYS_PAGE error=%d: 
start_addr=0x%016" PRIx64 " size=0x%08lx phys_offset=0x%08lx\n",
-                ret, start_addr,
-                (unsigned long)size, (unsigned long)phys_offset);
-    }
-}
-
-struct fpstate {
-    uint16_t fpuc;
-    uint16_t dummy1;
-    uint16_t fpus;
-    uint16_t dummy2;
-    uint16_t fptag;
-    uint16_t dummy3;
-
-    uint32_t fpip;
-    uint32_t fpcs;
-    uint32_t fpoo;
-    uint32_t fpos;
-    uint8_t fpregs1[8 * 10];
-};
-
-struct fpxstate {
-    uint16_t fpuc;
-    uint16_t fpus;
-    uint16_t fptag;
-    uint16_t fop;
-    uint32_t fpuip;
-    uint16_t cs_sel;
-    uint16_t dummy0;
-    uint32_t fpudp;
-    uint16_t ds_sel;
-    uint16_t dummy1;
-    uint32_t mxcsr;
-    uint32_t mxcsr_mask;
-    uint8_t fpregs1[8 * 16];
-    uint8_t xmm_regs[16 * 16];
-    uint8_t dummy2[96];
-};
-
-static struct fpxstate fpx1 __attribute__((aligned(16)));
-
-static void restore_native_fp_frstor(CPUState *env)
-{
-    int fptag, i, j;
-    struct fpstate fp1, *fp = &fp1;
-
-    fp->fpuc = env->fpuc;
-    fp->fpus = (env->fpus & ~0x3800) | (env->fpstt & 0x7) << 11;
-    fptag = 0;
-    for (i=7; i>=0; i--) {
-       fptag <<= 2;
-       if (env->fptags[i]) {
-            fptag |= 3;
-        } else {
-            /* the FPU automatically computes it */
-        }
-    }
-    fp->fptag = fptag;
-    j = env->fpstt;
-    for(i = 0;i < 8; i++) {
-        memcpy(&fp->fpregs1[i * 10], &env->fpregs[j].d, 10);
-        j = (j + 1) & 7;
-    }
-    asm volatile ("frstor %0" : "=m" (*fp));
-}
-
-static void save_native_fp_fsave(CPUState *env)
-{
-    int fptag, i, j;
-    uint16_t fpuc;
-    struct fpstate fp1, *fp = &fp1;
-
-    asm volatile ("fsave %0" : : "m" (*fp));
-    env->fpuc = fp->fpuc;
-    env->fpstt = (fp->fpus >> 11) & 7;
-    env->fpus = fp->fpus & ~0x3800;
-    fptag = fp->fptag;
-    for(i = 0;i < 8; i++) {
-        env->fptags[i] = ((fptag & 3) == 3);
-        fptag >>= 2;
-    }
-    j = env->fpstt;
-    for(i = 0;i < 8; i++) {
-        memcpy(&env->fpregs[j].d, &fp->fpregs1[i * 10], 10);
-        j = (j + 1) & 7;
-    }
-    /* we must restore the default rounding state */
-    fpuc = 0x037f | (env->fpuc & (3 << 10));
-    asm volatile("fldcw %0" : : "m" (fpuc));
-}
-
-static void restore_native_fp_fxrstor(CPUState *env)
-{
-    struct fpxstate *fp = &fpx1;
-    int i, j, fptag;
-
-    fp->fpuc = env->fpuc;
-    fp->fpus = (env->fpus & ~0x3800) | (env->fpstt & 0x7) << 11;
-    fptag = 0;
-    for(i = 0; i < 8; i++)
-        fptag |= (env->fptags[i] << i);
-    fp->fptag = fptag ^ 0xff;
-
-    j = env->fpstt;
-    for(i = 0;i < 8; i++) {
-        memcpy(&fp->fpregs1[i * 16], &env->fpregs[j].d, 10);
-        j = (j + 1) & 7;
-    }
-    if (env->cpuid_features & CPUID_SSE) {
-        fp->mxcsr = env->mxcsr;
-        /* XXX: check if DAZ is not available */
-        fp->mxcsr_mask = 0xffff;
-        memcpy(fp->xmm_regs, env->xmm_regs, CPU_NB_REGS * 16);
-    }
-    asm volatile ("fxrstor %0" : "=m" (*fp));
-}
-
-static void save_native_fp_fxsave(CPUState *env)
-{
-    struct fpxstate *fp = &fpx1;
-    int fptag, i, j;
-    uint16_t fpuc;
-
-    asm volatile ("fxsave %0" : : "m" (*fp));
-    env->fpuc = fp->fpuc;
-    env->fpstt = (fp->fpus >> 11) & 7;
-    env->fpus = fp->fpus & ~0x3800;
-    fptag = fp->fptag ^ 0xff;
-    for(i = 0;i < 8; i++) {
-        env->fptags[i] = (fptag >> i) & 1;
-    }
-    j = env->fpstt;
-    for(i = 0;i < 8; i++) {
-        memcpy(&env->fpregs[j].d, &fp->fpregs1[i * 16], 10);
-        j = (j + 1) & 7;
-    }
-    if (env->cpuid_features & CPUID_SSE) {
-        env->mxcsr = fp->mxcsr;
-        memcpy(env->xmm_regs, fp->xmm_regs, CPU_NB_REGS * 16);
-    }
-
-    /* we must restore the default rounding state */
-    asm volatile ("fninit");
-    fpuc = 0x037f | (env->fpuc & (3 << 10));
-    asm volatile("fldcw %0" : : "m" (fpuc));
-}
-
-static int do_syscall(CPUState *env,
-                      struct kqemu_cpu_state *kenv)
-{
-    int selector;
-
-    selector = (env->star >> 32) & 0xffff;
-#ifdef TARGET_X86_64
-    if (env->hflags & HF_LMA_MASK) {
-        int code64;
-
-        env->regs[R_ECX] = kenv->next_eip;
-        env->regs[11] = env->eflags;
-
-        code64 = env->hflags & HF_CS64_MASK;
-
-        cpu_x86_set_cpl(env, 0);
-        cpu_x86_load_seg_cache(env, R_CS, selector & 0xfffc,
-                               0, 0xffffffff,
-                               DESC_G_MASK | DESC_P_MASK |
-                               DESC_S_MASK |
-                               DESC_CS_MASK | DESC_R_MASK | DESC_A_MASK | 
DESC_L_MASK);
-        cpu_x86_load_seg_cache(env, R_SS, (selector + 8) & 0xfffc,
-                               0, 0xffffffff,
-                               DESC_G_MASK | DESC_B_MASK | DESC_P_MASK |
-                               DESC_S_MASK |
-                               DESC_W_MASK | DESC_A_MASK);
-        env->eflags &= ~env->fmask;
-        if (code64)
-            env->eip = env->lstar;
-        else
-            env->eip = env->cstar;
-    } else
-#endif
-    {
-        env->regs[R_ECX] = (uint32_t)kenv->next_eip;
-
-        cpu_x86_set_cpl(env, 0);
-        cpu_x86_load_seg_cache(env, R_CS, selector & 0xfffc,
-                           0, 0xffffffff,
-                               DESC_G_MASK | DESC_B_MASK | DESC_P_MASK |
-                               DESC_S_MASK |
-                               DESC_CS_MASK | DESC_R_MASK | DESC_A_MASK);
-        cpu_x86_load_seg_cache(env, R_SS, (selector + 8) & 0xfffc,
-                               0, 0xffffffff,
-                               DESC_G_MASK | DESC_B_MASK | DESC_P_MASK |
-                               DESC_S_MASK |
-                               DESC_W_MASK | DESC_A_MASK);
-        env->eflags &= ~(IF_MASK | RF_MASK | VM_MASK);
-        env->eip = (uint32_t)env->star;
-    }
-    return 2;
-}
-
-#ifdef CONFIG_PROFILER
-
-#define PC_REC_SIZE 1
-#define PC_REC_HASH_BITS 16
-#define PC_REC_HASH_SIZE (1 << PC_REC_HASH_BITS)
-
-typedef struct PCRecord {
-    unsigned long pc;
-    int64_t count;
-    struct PCRecord *next;
-} PCRecord;
-
-static PCRecord *pc_rec_hash[PC_REC_HASH_SIZE];
-static int nb_pc_records;
-
-static void kqemu_record_pc(unsigned long pc)
-{
-    unsigned long h;
-    PCRecord **pr, *r;
-
-    h = pc / PC_REC_SIZE;
-    h = h ^ (h >> PC_REC_HASH_BITS);
-    h &= (PC_REC_HASH_SIZE - 1);
-    pr = &pc_rec_hash[h];
-    for(;;) {
-        r = *pr;
-        if (r == NULL)
-            break;
-        if (r->pc == pc) {
-            r->count++;
-            return;
-        }
-        pr = &r->next;
-    }
-    r = malloc(sizeof(PCRecord));
-    r->count = 1;
-    r->pc = pc;
-    r->next = NULL;
-    *pr = r;
-    nb_pc_records++;
-}
-
-static int pc_rec_cmp(const void *p1, const void *p2)
-{
-    PCRecord *r1 = *(PCRecord **)p1;
-    PCRecord *r2 = *(PCRecord **)p2;
-    if (r1->count < r2->count)
-        return 1;
-    else if (r1->count == r2->count)
-        return 0;
-    else
-        return -1;
-}
-
-static void kqemu_record_flush(void)
-{
-    PCRecord *r, *r_next;
-    int h;
-
-    for(h = 0; h < PC_REC_HASH_SIZE; h++) {
-        for(r = pc_rec_hash[h]; r != NULL; r = r_next) {
-            r_next = r->next;
-            free(r);
-        }
-        pc_rec_hash[h] = NULL;
-    }
-    nb_pc_records = 0;
-}
-
-void kqemu_record_dump(void)
-{
-    PCRecord **pr, *r;
-    int i, h;
-    FILE *f;
-    int64_t total, sum;
-
-    pr = malloc(sizeof(PCRecord *) * nb_pc_records);
-    i = 0;
-    total = 0;
-    for(h = 0; h < PC_REC_HASH_SIZE; h++) {
-        for(r = pc_rec_hash[h]; r != NULL; r = r->next) {
-            pr[i++] = r;
-            total += r->count;
-        }
-    }
-    qsort(pr, nb_pc_records, sizeof(PCRecord *), pc_rec_cmp);
-
-    f = fopen("/tmp/kqemu.stats", "w");
-    if (!f) {
-        perror("/tmp/kqemu.stats");
-        exit(1);
-    }
-    fprintf(f, "total: %" PRId64 "\n", total);
-    sum = 0;
-    for(i = 0; i < nb_pc_records; i++) {
-        r = pr[i];
-        sum += r->count;
-        fprintf(f, "%08lx: %" PRId64 " %0.2f%% %0.2f%%\n",
-                r->pc,
-                r->count,
-                (double)r->count / (double)total * 100.0,
-                (double)sum / (double)total * 100.0);
-    }
-    fclose(f);
-    free(pr);
-
-    kqemu_record_flush();
-}
-#endif
-
-static inline void kqemu_load_seg(struct kqemu_segment_cache *ksc,
-                                  const SegmentCache *sc)
-{
-    ksc->selector = sc->selector;
-    ksc->flags = sc->flags;
-    ksc->limit = sc->limit;
-    ksc->base = sc->base;
-}
-
-static inline void kqemu_save_seg(SegmentCache *sc,
-                                  const struct kqemu_segment_cache *ksc)
-{
-    sc->selector = ksc->selector;
-    sc->flags = ksc->flags;
-    sc->limit = ksc->limit;
-    sc->base = ksc->base;
-}
-
-int kqemu_cpu_exec(CPUState *env)
-{
-    struct kqemu_cpu_state kcpu_state, *kenv = &kcpu_state;
-    int ret, cpl, i;
-#ifdef CONFIG_PROFILER
-    int64_t ti;
-#endif
-#ifdef _WIN32
-    DWORD temp;
-#endif
-
-#ifdef CONFIG_PROFILER
-    ti = profile_getclock();
-#endif
-    LOG_INT("kqemu: cpu_exec: enter\n");
-    LOG_INT_STATE(env);
-    for(i = 0; i < CPU_NB_REGS; i++)
-        kenv->regs[i] = env->regs[i];
-    kenv->eip = env->eip;
-    kenv->eflags = env->eflags;
-    for(i = 0; i < 6; i++)
-        kqemu_load_seg(&kenv->segs[i], &env->segs[i]);
-    kqemu_load_seg(&kenv->ldt, &env->ldt);
-    kqemu_load_seg(&kenv->tr, &env->tr);
-    kqemu_load_seg(&kenv->gdt, &env->gdt);
-    kqemu_load_seg(&kenv->idt, &env->idt);
-    kenv->cr0 = env->cr[0];
-    kenv->cr2 = env->cr[2];
-    kenv->cr3 = env->cr[3];
-    kenv->cr4 = env->cr[4];
-    kenv->a20_mask = env->a20_mask;
-    kenv->efer = env->efer;
-    kenv->tsc_offset = 0;
-    kenv->star = env->star;
-    kenv->sysenter_cs = env->sysenter_cs;
-    kenv->sysenter_esp = env->sysenter_esp;
-    kenv->sysenter_eip = env->sysenter_eip;
-#ifdef TARGET_X86_64
-    kenv->lstar = env->lstar;
-    kenv->cstar = env->cstar;
-    kenv->fmask = env->fmask;
-    kenv->kernelgsbase = env->kernelgsbase;
-#endif
-    if (env->dr[7] & 0xff) {
-        kenv->dr7 = env->dr[7];
-        kenv->dr0 = env->dr[0];
-        kenv->dr1 = env->dr[1];
-        kenv->dr2 = env->dr[2];
-        kenv->dr3 = env->dr[3];
-    } else {
-        kenv->dr7 = 0;
-    }
-    kenv->dr6 = env->dr[6];
-    cpl = (env->hflags & HF_CPL_MASK);
-    kenv->cpl = cpl;
-    kenv->nb_pages_to_flush = nb_pages_to_flush;
-    kenv->user_only = (env->kqemu_enabled == 1);
-    kenv->nb_ram_pages_to_update = nb_ram_pages_to_update;
-    nb_ram_pages_to_update = 0;
-    kenv->nb_modified_ram_pages = nb_modified_ram_pages;
-
-    kqemu_reset_modified_ram_pages();
-
-    if (env->cpuid_features & CPUID_FXSR)
-        restore_native_fp_fxrstor(env);
-    else
-        restore_native_fp_frstor(env);
-
-#ifdef _WIN32
-    if (DeviceIoControl(kqemu_fd, KQEMU_EXEC,
-                        kenv, sizeof(struct kqemu_cpu_state),
-                        kenv, sizeof(struct kqemu_cpu_state),
-                        &temp, NULL)) {
-        ret = kenv->retval;
-    } else {
-        ret = -1;
-    }
-#else
-    ioctl(kqemu_fd, KQEMU_EXEC, kenv);
-    ret = kenv->retval;
-#endif
-    if (env->cpuid_features & CPUID_FXSR)
-        save_native_fp_fxsave(env);
-    else
-        save_native_fp_fsave(env);
-
-    for(i = 0; i < CPU_NB_REGS; i++)
-        env->regs[i] = kenv->regs[i];
-    env->eip = kenv->eip;
-    env->eflags = kenv->eflags;
-    for(i = 0; i < 6; i++)
-        kqemu_save_seg(&env->segs[i], &kenv->segs[i]);
-    cpu_x86_set_cpl(env, kenv->cpl);
-    kqemu_save_seg(&env->ldt, &kenv->ldt);
-    env->cr[0] = kenv->cr0;
-    env->cr[4] = kenv->cr4;
-    env->cr[3] = kenv->cr3;
-    env->cr[2] = kenv->cr2;
-    env->dr[6] = kenv->dr6;
-#ifdef TARGET_X86_64
-    env->kernelgsbase = kenv->kernelgsbase;
-#endif
-
-    /* flush pages as indicated by kqemu */
-    if (kenv->nb_pages_to_flush >= KQEMU_FLUSH_ALL) {
-        tlb_flush(env, 1);
-    } else {
-        for(i = 0; i < kenv->nb_pages_to_flush; i++) {
-            tlb_flush_page(env, pages_to_flush[i]);
-        }
-    }
-    nb_pages_to_flush = 0;
-
-#ifdef CONFIG_PROFILER
-    kqemu_time += profile_getclock() - ti;
-    kqemu_exec_count++;
-#endif
-
-    if (kenv->nb_ram_pages_to_update > 0) {
-        cpu_tlb_update_dirty(env);
-    }
-
-    if (kenv->nb_modified_ram_pages > 0) {
-        for(i = 0; i < kenv->nb_modified_ram_pages; i++) {
-            unsigned long addr;
-            addr = modified_ram_pages[i];
-            tb_invalidate_phys_page_range(addr, addr + TARGET_PAGE_SIZE, 0);
-        }
-    }
-
-    /* restore the hidden flags */
-    {
-        unsigned int new_hflags;
-#ifdef TARGET_X86_64
-        if ((env->hflags & HF_LMA_MASK) &&
-            (env->segs[R_CS].flags & DESC_L_MASK)) {
-            /* long mode */
-            new_hflags = HF_CS32_MASK | HF_SS32_MASK | HF_CS64_MASK;
-        } else
-#endif
-        {
-            /* legacy / compatibility case */
-            new_hflags = (env->segs[R_CS].flags & DESC_B_MASK)
-                >> (DESC_B_SHIFT - HF_CS32_SHIFT);
-            new_hflags |= (env->segs[R_SS].flags & DESC_B_MASK)
-                >> (DESC_B_SHIFT - HF_SS32_SHIFT);
-            if (!(env->cr[0] & CR0_PE_MASK) ||
-                   (env->eflags & VM_MASK) ||
-                   !(env->hflags & HF_CS32_MASK)) {
-                /* XXX: try to avoid this test. The problem comes from the
-                   fact that is real mode or vm86 mode we only modify the
-                   'base' and 'selector' fields of the segment cache to go
-                   faster. A solution may be to force addseg to one in
-                   translate-i386.c. */
-                new_hflags |= HF_ADDSEG_MASK;
-            } else {
-                new_hflags |= ((env->segs[R_DS].base |
-                                env->segs[R_ES].base |
-                                env->segs[R_SS].base) != 0) <<
-                    HF_ADDSEG_SHIFT;
-            }
-        }
-        env->hflags = (env->hflags &
-           ~(HF_CS32_MASK | HF_SS32_MASK | HF_CS64_MASK | HF_ADDSEG_MASK)) |
-            new_hflags;
-    }
-    /* update FPU flags */
-    env->hflags = (env->hflags & ~(HF_MP_MASK | HF_EM_MASK | HF_TS_MASK)) |
-        ((env->cr[0] << (HF_MP_SHIFT - 1)) & (HF_MP_MASK | HF_EM_MASK | 
HF_TS_MASK));
-    if (env->cr[4] & CR4_OSFXSR_MASK)
-        env->hflags |= HF_OSFXSR_MASK;
-    else
-        env->hflags &= ~HF_OSFXSR_MASK;
-
-    LOG_INT("kqemu: kqemu_cpu_exec: ret=0x%x\n", ret);
-    if (ret == KQEMU_RET_SYSCALL) {
-        /* syscall instruction */
-        return do_syscall(env, kenv);
-    } else
-    if ((ret & 0xff00) == KQEMU_RET_INT) {
-        env->exception_index = ret & 0xff;
-        env->error_code = 0;
-        env->exception_is_int = 1;
-        env->exception_next_eip = kenv->next_eip;
-#ifdef CONFIG_PROFILER
-        kqemu_ret_int_count++;
-#endif
-        LOG_INT("kqemu: interrupt v=%02x:\n", env->exception_index);
-        LOG_INT_STATE(env);
-        return 1;
-    } else if ((ret & 0xff00) == KQEMU_RET_EXCEPTION) {
-        env->exception_index = ret & 0xff;
-        env->error_code = kenv->error_code;
-        env->exception_is_int = 0;
-        env->exception_next_eip = 0;
-#ifdef CONFIG_PROFILER
-        kqemu_ret_excp_count++;
-#endif
-        LOG_INT("kqemu: exception v=%02x e=%04x:\n",
-                    env->exception_index, env->error_code);
-        LOG_INT_STATE(env);
-        return 1;
-    } else if (ret == KQEMU_RET_INTR) {
-#ifdef CONFIG_PROFILER
-        kqemu_ret_intr_count++;
-#endif
-        LOG_INT_STATE(env);
-        return 0;
-    } else if (ret == KQEMU_RET_SOFTMMU) {
-#ifdef CONFIG_PROFILER
-        {
-            unsigned long pc = env->eip + env->segs[R_CS].base;
-            kqemu_record_pc(pc);
-        }
-#endif
-        LOG_INT_STATE(env);
-        return 2;
-    } else {
-        cpu_dump_state(env, stderr, fprintf, 0);
-        fprintf(stderr, "Unsupported return value: 0x%x\n", ret);
-        exit(1);
-    }
-    return 0;
-}
-
-void kqemu_cpu_interrupt(CPUState *env)
-{
-#if defined(_WIN32)
-    /* cancelling the I/O request causes KQEMU to finish executing the
-       current block and successfully returning. */
-    CancelIo(kqemu_fd);
-#endif
-}
-
-/*
-   QEMU paravirtualization interface. The current interface only
-   allows to modify the IF and IOPL flags when running in
-   kqemu.
-
-   At this point it is not very satisfactory. I leave it for reference
-   as it adds little complexity.
-*/
-
-#define QPI_COMM_PAGE_PHYS_ADDR 0xff000000
-
-static uint32_t qpi_mem_readb(void *opaque, target_phys_addr_t addr)
-{
-    return 0;
-}
-
-static uint32_t qpi_mem_readw(void *opaque, target_phys_addr_t addr)
-{
-    return 0;
-}
-
-static void qpi_mem_writeb(void *opaque, target_phys_addr_t addr, uint32_t val)
-{
-}
-
-static void qpi_mem_writew(void *opaque, target_phys_addr_t addr, uint32_t val)
-{
-}
-
-static uint32_t qpi_mem_readl(void *opaque, target_phys_addr_t addr)
-{
-    CPUState *env;
-
-    env = cpu_single_env;
-    if (!env)
-        return 0;
-    return env->eflags & (IF_MASK | IOPL_MASK);
-}
-
-/* Note: after writing to this address, the guest code must make sure
-   it is exiting the current TB. pushf/popf can be used for that
-   purpose. */
-static void qpi_mem_writel(void *opaque, target_phys_addr_t addr, uint32_t val)
-{
-    CPUState *env;
-
-    env = cpu_single_env;
-    if (!env)
-        return;
-    env->eflags = (env->eflags & ~(IF_MASK | IOPL_MASK)) |
-        (val & (IF_MASK | IOPL_MASK));
-}
-
-static CPUReadMemoryFunc * const qpi_mem_read[3] = {
-    qpi_mem_readb,
-    qpi_mem_readw,
-    qpi_mem_readl,
-};
-
-static CPUWriteMemoryFunc * const qpi_mem_write[3] = {
-    qpi_mem_writeb,
-    qpi_mem_writew,
-    qpi_mem_writel,
-};
-
-static void qpi_init(void)
-{
-    kqemu_comm_base = 0xff000000 | 1;
-    qpi_io_memory = cpu_register_io_memory(
-                                           qpi_mem_read,
-                                           qpi_mem_write, NULL);
-    cpu_register_physical_memory(kqemu_comm_base & ~0xfff,
-                                 0x1000, qpi_io_memory);
-}
-#endif