Commit f32fc648 authored by bellard's avatar bellard
Browse files

optional support for kernel code virtualization


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1753 c046a42c-6fe2-441c-8c8c-71466251a162
parent f1c85677
......@@ -627,6 +627,9 @@ int cpu_exec(CPUState *env1)
jump. */
{
if (T0 != 0 &&
#if USE_KQEMU
(env->kqemu_enabled != 2) &&
#endif
tb->page_addr[1] == -1
#if defined(TARGET_I386) && defined(USE_CODE_COPY)
&& (tb->cflags & CF_CODE_COPY) ==
......@@ -755,6 +758,13 @@ int cpu_exec(CPUState *env1)
/* do not allow linking to another block */
T0 = 0;
}
#endif
#if defined(USE_KQEMU)
#define MIN_CYCLE_BEFORE_SWITCH (100 * 1000)
if (kqemu_is_ok(env) &&
(cpu_get_time_fast() - env->last_io_time) >= MIN_CYCLE_BEFORE_SWITCH) {
cpu_loop_exit();
}
#endif
}
} else {
......
......@@ -577,21 +577,27 @@ static inline target_ulong get_phys_addr_code(CPUState *env, target_ulong addr)
#ifdef USE_KQEMU
#define KQEMU_MODIFY_PAGE_MASK (0xff & ~(VGA_DIRTY_FLAG | CODE_DIRTY_FLAG))
int kqemu_init(CPUState *env);
int kqemu_cpu_exec(CPUState *env);
void kqemu_flush_page(CPUState *env, target_ulong addr);
void kqemu_flush(CPUState *env, int global);
void kqemu_set_notdirty(CPUState *env, ram_addr_t ram_addr);
void kqemu_modify_page(CPUState *env, ram_addr_t ram_addr);
void kqemu_cpu_interrupt(CPUState *env);
void kqemu_record_dump(void);
static inline int kqemu_is_ok(CPUState *env)
{
return(env->kqemu_enabled &&
(env->hflags & HF_CPL_MASK) == 3 &&
(env->eflags & IOPL_MASK) != IOPL_MASK &&
(env->cr[0] & CR0_PE_MASK) &&
!(env->hflags & HF_INHIBIT_IRQ_MASK) &&
(env->eflags & IF_MASK) &&
!(env->eflags & VM_MASK));
!(env->eflags & VM_MASK) &&
(env->kqemu_enabled == 2 ||
((env->hflags & HF_CPL_MASK) == 3 &&
(env->eflags & IOPL_MASK) != IOPL_MASK)));
}
#endif
......@@ -1796,6 +1796,11 @@ static void notdirty_mem_writeb(void *opaque, target_phys_addr_t addr, uint32_t
#endif
}
stb_p((uint8_t *)(long)addr, val);
#ifdef USE_KQEMU
if (cpu_single_env->kqemu_enabled &&
(dirty_flags & KQEMU_MODIFY_PAGE_MASK) != KQEMU_MODIFY_PAGE_MASK)
kqemu_modify_page(cpu_single_env, ram_addr);
#endif
dirty_flags |= (0xff & ~CODE_DIRTY_FLAG);
phys_ram_dirty[ram_addr >> TARGET_PAGE_BITS] = dirty_flags;
/* we remove the notdirty callback only if the code has been
......@@ -1817,6 +1822,11 @@ static void notdirty_mem_writew(void *opaque, target_phys_addr_t addr, uint32_t
#endif
}
stw_p((uint8_t *)(long)addr, val);
#ifdef USE_KQEMU
if (cpu_single_env->kqemu_enabled &&
(dirty_flags & KQEMU_MODIFY_PAGE_MASK) != KQEMU_MODIFY_PAGE_MASK)
kqemu_modify_page(cpu_single_env, ram_addr);
#endif
dirty_flags |= (0xff & ~CODE_DIRTY_FLAG);
phys_ram_dirty[ram_addr >> TARGET_PAGE_BITS] = dirty_flags;
/* we remove the notdirty callback only if the code has been
......@@ -1838,6 +1848,11 @@ static void notdirty_mem_writel(void *opaque, target_phys_addr_t addr, uint32_t
#endif
}
stl_p((uint8_t *)(long)addr, val);
#ifdef USE_KQEMU
if (cpu_single_env->kqemu_enabled &&
(dirty_flags & KQEMU_MODIFY_PAGE_MASK) != KQEMU_MODIFY_PAGE_MASK)
kqemu_modify_page(cpu_single_env, ram_addr);
#endif
dirty_flags |= (0xff & ~CODE_DIRTY_FLAG);
phys_ram_dirty[ram_addr >> TARGET_PAGE_BITS] = dirty_flags;
/* we remove the notdirty callback only if the code has been
......
......@@ -54,6 +54,9 @@
#define KQEMU_MAX_RAM_PAGES_TO_UPDATE 512
#define KQEMU_RAM_PAGES_UPDATE_ALL (KQEMU_MAX_RAM_PAGES_TO_UPDATE + 1)
#endif
#ifndef KQEMU_MAX_MODIFIED_RAM_PAGES
#define KQEMU_MAX_MODIFIED_RAM_PAGES 512
#endif
#ifdef _WIN32
#define KQEMU_DEVICE "\\\\.\\kqemu"
......@@ -71,11 +74,18 @@ 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 = 1;
unsigned long *pages_to_flush;
unsigned int nb_pages_to_flush;
unsigned long *ram_pages_to_update;
unsigned int nb_ram_pages_to_update;
unsigned long *modified_ram_pages;
unsigned int nb_modified_ram_pages;
uint8_t *modified_ram_pages_table;
extern uint32_t **l1_phys_map;
#define cpuid(index, eax, ebx, ecx, edx) \
......@@ -185,6 +195,14 @@ int kqemu_init(CPUState *env)
if (!ram_pages_to_update)
goto fail;
modified_ram_pages = qemu_vmalloc(KQEMU_MAX_MODIFIED_RAM_PAGES *
sizeof(unsigned long));
if (!modified_ram_pages)
goto fail;
modified_ram_pages_table = qemu_mallocz(phys_ram_size >> TARGET_PAGE_BITS);
if (!modified_ram_pages_table)
goto fail;
init.ram_base = phys_ram_base;
init.ram_size = phys_ram_size;
init.ram_dirty = phys_ram_dirty;
......@@ -193,6 +211,9 @@ int kqemu_init(CPUState *env)
#if KQEMU_VERSION >= 0x010200
init.ram_pages_to_update = ram_pages_to_update;
#endif
#if KQEMU_VERSION >= 0x010300
init.modified_ram_pages = modified_ram_pages;
#endif
#ifdef _WIN32
ret = DeviceIoControl(kqemu_fd, KQEMU_INIT, &init, sizeof(init),
NULL, 0, &temp, NULL) == TRUE ? 0 : -1;
......@@ -207,7 +228,7 @@ int kqemu_init(CPUState *env)
return -1;
}
kqemu_update_cpuid(env);
env->kqemu_enabled = 1;
env->kqemu_enabled = kqemu_allowed;
nb_pages_to_flush = 0;
nb_ram_pages_to_update = 0;
return 0;
......@@ -215,7 +236,7 @@ int kqemu_init(CPUState *env)
void kqemu_flush_page(CPUState *env, target_ulong addr)
{
#ifdef DEBUG
#if defined(DEBUG)
if (loglevel & CPU_LOG_INT) {
fprintf(logfile, "kqemu_flush_page: addr=" TARGET_FMT_lx "\n", addr);
}
......@@ -252,6 +273,49 @@ void kqemu_set_notdirty(CPUState *env, ram_addr_t ram_addr)
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();
}
}
}
struct fpstate {
uint16_t fpuc;
uint16_t dummy1;
......@@ -442,7 +506,7 @@ static int do_syscall(CPUState *env,
return 2;
}
#ifdef PROFILE
#ifdef CONFIG_PROFILER
#define PC_REC_SIZE 1
#define PC_REC_HASH_BITS 16
......@@ -454,10 +518,10 @@ typedef struct PCRecord {
struct PCRecord *next;
} PCRecord;
PCRecord *pc_rec_hash[PC_REC_HASH_SIZE];
int nb_pc_records;
static PCRecord *pc_rec_hash[PC_REC_HASH_SIZE];
static int nb_pc_records;
void kqemu_record_pc(unsigned long pc)
static void kqemu_record_pc(unsigned long pc)
{
unsigned long h;
PCRecord **pr, *r;
......@@ -484,7 +548,7 @@ void kqemu_record_pc(unsigned long pc)
nb_pc_records++;
}
int pc_rec_cmp(const void *p1, const void *p2)
static int pc_rec_cmp(const void *p1, const void *p2)
{
PCRecord *r1 = *(PCRecord **)p1;
PCRecord *r2 = *(PCRecord **)p2;
......@@ -496,6 +560,21 @@ int pc_rec_cmp(const void *p1, const void *p2)
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;
......@@ -532,21 +611,26 @@ void kqemu_record_dump(void)
}
fclose(f);
free(pr);
}
#else
void kqemu_record_dump(void)
{
kqemu_record_flush();
}
#endif
int kqemu_cpu_exec(CPUState *env)
{
struct kqemu_cpu_state kcpu_state, *kenv = &kcpu_state;
int ret;
int ret, cpl, i;
#ifdef CONFIG_PROFILER
int64_t ti;
#endif
#ifdef _WIN32
DWORD temp;
#endif
#ifdef CONFIG_PROFILER
ti = profile_getclock();
#endif
#ifdef DEBUG
if (loglevel & CPU_LOG_INT) {
fprintf(logfile, "kqemu: cpu_exec: enter\n");
......@@ -568,6 +652,19 @@ int kqemu_cpu_exec(CPUState *env)
kenv->a20_mask = env->a20_mask;
#if KQEMU_VERSION >= 0x010100
kenv->efer = env->efer;
#endif
#if KQEMU_VERSION >= 0x010300
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 __x86_64__
kenv->lstar = env->lstar;
kenv->cstar = env->cstar;
kenv->fmask = env->fmask;
kenv->kernelgsbase = env->kernelgsbase;
#endif
#endif
if (env->dr[7] & 0xff) {
kenv->dr7 = env->dr[7];
......@@ -579,21 +676,24 @@ int kqemu_cpu_exec(CPUState *env)
kenv->dr7 = 0;
}
kenv->dr6 = env->dr[6];
kenv->cpl = 3;
cpl = (env->hflags & HF_CPL_MASK);
kenv->cpl = cpl;
kenv->nb_pages_to_flush = nb_pages_to_flush;
nb_pages_to_flush = 0;
#if KQEMU_VERSION >= 0x010200
kenv->user_only = 1;
kenv->user_only = (env->kqemu_enabled == 1);
kenv->nb_ram_pages_to_update = nb_ram_pages_to_update;
#endif
nb_ram_pages_to_update = 0;
if (!(kenv->cr0 & CR0_TS_MASK)) {
if (env->cpuid_features & CPUID_FXSR)
restore_native_fp_fxrstor(env);
else
restore_native_fp_frstor(env);
}
#if KQEMU_VERSION >= 0x010300
kenv->nb_modified_ram_pages = nb_modified_ram_pages;
#endif
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,
......@@ -612,30 +712,49 @@ int kqemu_cpu_exec(CPUState *env)
ret = ioctl(kqemu_fd, KQEMU_EXEC, kenv);
#endif
#endif
if (!(kenv->cr0 & CR0_TS_MASK)) {
if (env->cpuid_features & CPUID_FXSR)
save_native_fp_fxsave(env);
else
save_native_fp_fsave(env);
}
if (env->cpuid_features & CPUID_FXSR)
save_native_fp_fxsave(env);
else
save_native_fp_fsave(env);
memcpy(env->regs, kenv->regs, sizeof(env->regs));
env->eip = kenv->eip;
env->eflags = kenv->eflags;
memcpy(env->segs, kenv->segs, sizeof(env->segs));
cpu_x86_set_cpl(env, kenv->cpl);
memcpy(&env->ldt, &kenv->ldt, sizeof(env->ldt));
#if 0
/* no need to restore that */
memcpy(env->ldt, kenv->ldt, sizeof(env->ldt));
memcpy(env->tr, kenv->tr, sizeof(env->tr));
memcpy(env->gdt, kenv->gdt, sizeof(env->gdt));
memcpy(env->idt, kenv->idt, sizeof(env->idt));
env->cr[0] = kenv->cr0;
env->cr[3] = kenv->cr3;
env->cr[4] = kenv->cr4;
env->a20_mask = kenv->a20_mask;
#endif
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;
#if KQEMU_VERSION >= 0x010300
#ifdef __x86_64__
env->kernelgsbase = kenv->kernelgsbase;
#endif
#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 KQEMU_VERSION >= 0x010200
if (kenv->nb_ram_pages_to_update > 0) {
......@@ -643,6 +762,16 @@ int kqemu_cpu_exec(CPUState *env)
}
#endif
#if KQEMU_VERSION >= 0x010300
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);
}
}
#endif
/* restore the hidden flags */
{
unsigned int new_hflags;
......@@ -679,7 +808,14 @@ int kqemu_cpu_exec(CPUState *env)
~(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;
#ifdef DEBUG
if (loglevel & CPU_LOG_INT) {
fprintf(logfile, "kqemu: kqemu_cpu_exec: ret=0x%x\n", ret);
......@@ -694,6 +830,9 @@ int kqemu_cpu_exec(CPUState *env)
env->error_code = 0;
env->exception_is_int = 1;
env->exception_next_eip = kenv->next_eip;
#ifdef CONFIG_PROFILER
kqemu_ret_int_count++;
#endif
#ifdef DEBUG
if (loglevel & CPU_LOG_INT) {
fprintf(logfile, "kqemu: interrupt v=%02x:\n",
......@@ -707,6 +846,9 @@ int kqemu_cpu_exec(CPUState *env)
env->error_code = kenv->error_code;
env->exception_is_int = 0;
env->exception_next_eip = 0;
#ifdef CONFIG_PROFILER
kqemu_ret_excp_count++;
#endif
#ifdef DEBUG
if (loglevel & CPU_LOG_INT) {
fprintf(logfile, "kqemu: exception v=%02x e=%04x:\n",
......@@ -716,6 +858,9 @@ int kqemu_cpu_exec(CPUState *env)
#endif
return 1;
} else if (ret == KQEMU_RET_INTR) {
#ifdef CONFIG_PROFILER
kqemu_ret_intr_count++;
#endif
#ifdef DEBUG
if (loglevel & CPU_LOG_INT) {
cpu_dump_state(env, logfile, fprintf, 0);
......@@ -723,8 +868,11 @@ int kqemu_cpu_exec(CPUState *env)
#endif
return 0;
} else if (ret == KQEMU_RET_SOFTMMU) {
#ifdef PROFILE
kqemu_record_pc(env->eip + env->segs[R_CS].base);
#ifdef CONFIG_PROFILER
{
unsigned long pc = env->eip + env->segs[R_CS].base;
kqemu_record_pc(pc);
}
#endif
#ifdef DEBUG
if (loglevel & CPU_LOG_INT) {
......
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