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kqemu support 

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1283 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
bellard 2005-02-10 22:05:51 +00:00
parent 92a31b1fff
commit 9df217a317
5 changed files with 527 additions and 11 deletions
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26
cpu-exec.c
View File

@ -209,7 +209,33 @@ int cpu_exec(CPUState *env1)
#endif
}
env->exception_index = -1;
}
#ifdef USE_KQEMU
if (kqemu_is_ok(env) && env->interrupt_request == 0) {
int ret;
env->eflags = env->eflags | cc_table[CC_OP].compute_all() | (DF & DF_MASK);
ret = kqemu_cpu_exec(env);
/* put eflags in CPU temporary format */
CC_SRC = env->eflags & (CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C);
DF = 1 - (2 * ((env->eflags >> 10) & 1));
CC_OP = CC_OP_EFLAGS;
env->eflags &= ~(DF_MASK | CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C);
if (ret == 1) {
/* exception */
longjmp(env->jmp_env, 1);
} else if (ret == 2) {
/* softmmu execution needed */
} else {
if (env->interrupt_request != 0) {
/* hardware interrupt will be executed just after */
} else {
/* otherwise, we restart */
longjmp(env->jmp_env, 1);
}
}
}
#endif
T0 = 0; /* force lookup of first TB */
for(;;) {
#ifdef __sparc__

22
exec-all.h
View File

@ -586,3 +586,25 @@ static inline target_ulong get_phys_addr_code(CPUState *env, target_ulong addr)
return addr + env->tlb_read[is_user][index].addend - (unsigned long)phys_ram_base;
}
#endif
#ifdef USE_KQEMU
extern int kqemu_fd;
extern int kqemu_flushed;
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);
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->eflags & IF_MASK) &&
!(env->eflags & VM_MASK));
}
#endif

427
kqemu.c Normal file
View File

@ -0,0 +1,427 @@
/*
* KQEMU support
*
* Copyright (c) 2005 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, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "config.h"
#ifdef _WIN32
#include <windows.h>
#else
#include <sys/types.h>
#include <sys/mman.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"
#ifdef USE_KQEMU
#define DEBUG
#include <unistd.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include "kqemu/kqemu.h"
#define KQEMU_DEVICE "/dev/kqemu"
int kqemu_allowed = 1;
int kqemu_fd = -1;
unsigned long *pages_to_flush;
unsigned int nb_pages_to_flush;
extern uint32_t **l1_phys_map;
#define cpuid(index, eax, ebx, ecx, edx) \
asm volatile ("cpuid" \
: "=a" (eax), "=b" (ebx), "=c" (ecx), "=d" (edx) \
: "0" (index))
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);
}
static void kqemu_update_cpuid(CPUState *env)
{
int critical_features_mask, features;
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;
if (!is_cpuid_supported()) {
features = 0;
} else {
cpuid(1, eax, ebx, ecx, edx);
features = edx;
}
env->cpuid_features = (env->cpuid_features & ~critical_features_mask) |
(features & critical_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 init;
int ret, version;
if (!kqemu_allowed)
return -1;
kqemu_fd = open(KQEMU_DEVICE, O_RDWR);
if (kqemu_fd < 0) {
fprintf(stderr, "Could not open '%s' - QEMU acceleration layer not activated\n", KQEMU_DEVICE);
return -1;
}
version = 0;
ioctl(kqemu_fd, KQEMU_GET_VERSION, &version);
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(unsigned long));
if (!pages_to_flush)
goto fail;
init.ram_base = phys_ram_base;
init.ram_size = phys_ram_size;
init.ram_dirty = phys_ram_dirty;
init.phys_to_ram_map = l1_phys_map;
init.pages_to_flush = pages_to_flush;
ret = ioctl(kqemu_fd, KQEMU_INIT, &init);
if (ret < 0) {
fprintf(stderr, "Error %d while initializing QEMU acceleration layer - disabling it for now\n", ret);
fail:
close(kqemu_fd);
kqemu_fd = -1;
return -1;
}
kqemu_update_cpuid(env);
env->kqemu_enabled = 1;
nb_pages_to_flush = 0;
return 0;
}
void kqemu_flush_page(CPUState *env, target_ulong addr)
{
#ifdef DEBUG
if (loglevel & CPU_LOG_INT) {
fprintf(logfile, "kqemu_flush_page: addr=" TARGET_FMT_lx "\n", addr);
}
#endif
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)
{
#ifdef DEBUG
if (loglevel & CPU_LOG_INT) {
fprintf(logfile, "kqemu_flush:\n");
}
#endif
nb_pages_to_flush = KQEMU_FLUSH_ALL;
}
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[8 * 16];
uint8_t dummy2[224];
};
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, 8 * 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, 8 * 16);
}
/* we must restore the default rounding state */
asm volatile ("fninit");
fpuc = 0x037f | (env->fpuc & (3 << 10));
asm volatile("fldcw %0" : : "m" (fpuc));
}
int kqemu_cpu_exec(CPUState *env)
{
struct kqemu_cpu_state kcpu_state, *kenv = &kcpu_state;
int ret;
#ifdef DEBUG
if (loglevel & CPU_LOG_INT) {
fprintf(logfile, "kqemu: cpu_exec: enter\n");
cpu_dump_state(env, logfile, fprintf, 0);
}
#endif
memcpy(kenv->regs, env->regs, sizeof(kenv->regs));
kenv->eip = env->eip;
kenv->eflags = env->eflags;
memcpy(&kenv->segs, &env->segs, sizeof(env->segs));
memcpy(&kenv->ldt, &env->ldt, sizeof(env->ldt));
memcpy(&kenv->tr, &env->tr, sizeof(env->tr));
memcpy(&kenv->gdt, &env->gdt, sizeof(env->gdt));
memcpy(&kenv->idt, &env->idt, sizeof(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;
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];
kenv->cpl = 3;
kenv->nb_pages_to_flush = nb_pages_to_flush;
nb_pages_to_flush = 0;
if (!(kenv->cr0 & CR0_TS_MASK)) {
if (env->cpuid_features & CPUID_FXSR)
restore_native_fp_fxrstor(env);
else
restore_native_fp_frstor(env);
}
ret = ioctl(kqemu_fd, KQEMU_EXEC, kenv);
if (!(kenv->cr0 & CR0_TS_MASK)) {
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));
#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[2] = kenv->cr2;
env->dr[6] = kenv->dr6;
#ifdef DEBUG
if (loglevel & CPU_LOG_INT) {
fprintf(logfile, "kqemu: kqemu_cpu_exec: ret=0x%x\n", ret);
}
#endif
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 DEBUG
if (loglevel & CPU_LOG_INT) {
fprintf(logfile, "kqemu: interrupt v=%02x:\n",
env->exception_index);
cpu_dump_state(env, logfile, fprintf, 0);
}
#endif
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 DEBUG
if (loglevel & CPU_LOG_INT) {
fprintf(logfile, "kqemu: exception v=%02x e=%04x:\n",
env->exception_index, env->error_code);
cpu_dump_state(env, logfile, fprintf, 0);
}
#endif
return 1;
} else if (ret == KQEMU_RET_INTR) {
return 0;
} else if (ret == KQEMU_RET_SOFTMMU) {
return 2;
} else {
cpu_dump_state(env, stderr, fprintf, 0);
fprintf(stderr, "Unsupported return value: 0x%x\n", ret);
exit(1);
}
return 0;
}
#endif

35
target-i386/cpu.h
View File

@ -39,6 +39,9 @@
#if defined(__i386__) && !defined(CONFIG_SOFTMMU)
#define USE_CODE_COPY
#endif
#if defined(__linux__) && defined(CONFIG_SOFTMMU) && defined(__i386__) && !defined(TARGET_X86_64)
#define USE_KQEMU
#endif
#define R_EAX 0
#define R_ECX 1
@ -248,6 +251,14 @@
#define CPUID_SSE (1 << 25)
#define CPUID_SSE2 (1 << 26)
#define CPUID_EXT_SS3 (1 << 0)
#define CPUID_EXT_MONITOR (1 << 3)
#define CPUID_EXT_CX16 (1 << 13)
#define CPUID_EXT2_SYSCALL (1 << 11)
#define CPUID_EXT2_NX (1 << 20)
#define CPUID_EXT2_LM (1 << 29)
#define EXCP00_DIVZ 0
#define EXCP01_SSTP 1
#define EXCP02_NMI 2
@ -408,6 +419,16 @@ typedef struct CPUX86State {
int32_t df; /* D flag : 1 if D = 0, -1 if D = 1 */
uint32_t hflags; /* hidden flags, see HF_xxx constants */
/* segments */
SegmentCache segs[6]; /* selector values */
SegmentCache ldt;
SegmentCache tr;
SegmentCache gdt; /* only base and limit are used */
SegmentCache idt; /* only base and limit are used */
target_ulong cr[5]; /* NOTE: cr1 is unused */
uint32_t a20_mask;
/* FPU state */
unsigned int fpstt; /* top of stack index */
unsigned int fpus;
@ -431,13 +452,6 @@ typedef struct CPUX86State {
int64_t i64;
} fp_convert;
/* segments */
SegmentCache segs[6]; /* selector values */
SegmentCache ldt;
SegmentCache tr;
SegmentCache gdt; /* only base and limit are used */
SegmentCache idt; /* only base and limit are used */
uint32_t mxcsr;
XMMReg xmm_regs[CPU_NB_REGS];
XMMReg xmm_t0;
@ -470,13 +484,10 @@ typedef struct CPUX86State {
int exception_is_int;
target_ulong exception_next_eip;
struct TranslationBlock *current_tb; /* currently executing TB */
target_ulong cr[5]; /* NOTE: cr1 is unused */
target_ulong dr[8]; /* debug registers */
int interrupt_request;
int user_mode_only; /* user mode only simulation */
uint32_t a20_mask;
/* soft mmu support */
/* in order to avoid passing too many arguments to the memory
write helpers, we store some rarely used information in the CPU
@ -501,7 +512,11 @@ typedef struct CPUX86State {
uint32_t cpuid_vendor3;
uint32_t cpuid_version;
uint32_t cpuid_features;
uint32_t cpuid_ext_features;
#ifdef USE_KQEMU
int kqemu_enabled;
#endif
/* in order to simplify APIC support, we leave this pointer to the
user */
struct APICState *apic_state;

28
target-i386/helper.c
View File

@ -1274,7 +1274,7 @@ void helper_cpuid(void)
case 1:
EAX = env->cpuid_version;
EBX = 0;
ECX = 0;
ECX = env->cpuid_ext_features;
EDX = env->cpuid_features;
break;
default:
@ -1828,6 +1828,12 @@ void helper_lcall_protected_T0_T1(int shift, int next_eip)
ESP = (ESP & ~sp_mask) | (sp & sp_mask);
EIP = offset;
}
#ifdef USE_KQEMU
if (kqemu_is_ok(env)) {
env->exception_index = -1;
cpu_loop_exit();
}
#endif
}
/* real and vm86 mode iret */
@ -2097,11 +2103,25 @@ void helper_iret_protected(int shift, int next_eip)
} else {
helper_ret_protected(shift, 1, 0);
}
#ifdef USE_KQEMU
if (kqemu_is_ok(env)) {
CC_OP = CC_OP_EFLAGS;
env->exception_index = -1;
cpu_loop_exit();
}
#endif
}
void helper_lret_protected(int shift, int addend)
{
helper_ret_protected(shift, 0, addend);
#ifdef USE_KQEMU
if (kqemu_is_ok(env)) {
CC_OP = CC_OP_EFLAGS;
env->exception_index = -1;
cpu_loop_exit();
}
#endif
}
void helper_sysenter(void)
@ -2146,6 +2166,12 @@ void helper_sysexit(void)
DESC_W_MASK | DESC_A_MASK);
ESP = ECX;
EIP = EDX;
#ifdef USE_KQEMU
if (kqemu_is_ok(env)) {
env->exception_index = -1;
cpu_loop_exit();
}
#endif
}
void helper_movl_crN_T0(int reg)