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-rw-r--r--kqemu.c255
1 files changed, 180 insertions, 75 deletions
diff --git a/kqemu.c b/kqemu.c
index 88592eee7a..540aa3cc56 100644
--- a/kqemu.c
+++ b/kqemu.c
@@ -1,7 +1,7 @@
/*
* KQEMU support
*
- * Copyright (c) 2005 Fabrice Bellard
+ * 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
@@ -51,24 +51,14 @@
#include <fcntl.h>
#include "kqemu.h"
-/* compatibility stuff */
-#ifndef KQEMU_RET_SYSCALL
-#define KQEMU_RET_SYSCALL 0x0300 /* syscall insn */
-#endif
-#ifndef KQEMU_MAX_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)
-#endif
-#ifndef KQEMU_MAX_MODIFIED_RAM_PAGES
-#define KQEMU_MAX_MODIFIED_RAM_PAGES 512
-#endif
-
#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;
@@ -84,14 +74,15 @@ int kqemu_fd = KQEMU_INVALID_FD;
2 = kernel kqemu
*/
int kqemu_allowed = 1;
-unsigned long *pages_to_flush;
+uint64_t *pages_to_flush;
unsigned int nb_pages_to_flush;
-unsigned long *ram_pages_to_update;
+uint64_t *ram_pages_to_update;
unsigned int nb_ram_pages_to_update;
-unsigned long *modified_ram_pages;
+uint64_t *modified_ram_pages;
unsigned int nb_modified_ram_pages;
uint8_t *modified_ram_pages_table;
-extern uint32_t **l1_phys_map;
+int qpi_io_memory;
+uint32_t kqemu_comm_base; /* physical address of the QPI communication page */
#define cpuid(index, eax, ebx, ecx, edx) \
asm volatile ("cpuid" \
@@ -161,7 +152,7 @@ static void kqemu_update_cpuid(CPUState *env)
int kqemu_init(CPUState *env)
{
- struct kqemu_init init;
+ struct kqemu_init kinit;
int ret, version;
#ifdef _WIN32
DWORD temp;
@@ -197,39 +188,35 @@ int kqemu_init(CPUState *env)
}
pages_to_flush = qemu_vmalloc(KQEMU_MAX_PAGES_TO_FLUSH *
- sizeof(unsigned long));
+ sizeof(uint64_t));
if (!pages_to_flush)
goto fail;
ram_pages_to_update = qemu_vmalloc(KQEMU_MAX_RAM_PAGES_TO_UPDATE *
- sizeof(unsigned long));
+ sizeof(uint64_t));
if (!ram_pages_to_update)
goto fail;
modified_ram_pages = qemu_vmalloc(KQEMU_MAX_MODIFIED_RAM_PAGES *
- sizeof(unsigned long));
+ sizeof(uint64_t));
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;
- init.phys_to_ram_map = l1_phys_map;
- init.pages_to_flush = pages_to_flush;
-#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
+ memset(&kinit, 0, sizeof(kinit)); /* set the paddings to zero */
+ kinit.ram_base = phys_ram_base;
+ kinit.ram_size = 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, &init, sizeof(init),
+ ret = DeviceIoControl(kqemu_fd, KQEMU_INIT, &kinit, sizeof(kinit),
NULL, 0, &temp, NULL) == TRUE ? 0 : -1;
#else
- ret = ioctl(kqemu_fd, KQEMU_INIT, &init);
+ 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);
@@ -242,6 +229,8 @@ int kqemu_init(CPUState *env)
env->kqemu_enabled = kqemu_allowed;
nb_pages_to_flush = 0;
nb_ram_pages_to_update = 0;
+
+ qpi_init();
return 0;
}
@@ -272,7 +261,8 @@ void kqemu_set_notdirty(CPUState *env, ram_addr_t ram_addr)
{
#ifdef DEBUG
if (loglevel & CPU_LOG_INT) {
- fprintf(logfile, "kqemu_set_notdirty: addr=%08lx\n", ram_addr);
+ fprintf(logfile, "kqemu_set_notdirty: addr=%08lx\n",
+ (unsigned long)ram_addr);
}
#endif
/* we only track transitions to dirty state */
@@ -327,6 +317,51 @@ void kqemu_modify_page(CPUState *env, ram_addr_t ram_addr)
}
}
+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;
@@ -474,7 +509,7 @@ static int do_syscall(CPUState *env,
int selector;
selector = (env->star >> 32) & 0xffff;
-#ifdef __x86_64__
+#ifdef TARGET_X86_64
if (env->hflags & HF_LMA_MASK) {
int code64;
@@ -631,6 +666,24 @@ void kqemu_record_dump(void)
}
#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;
@@ -638,7 +691,6 @@ int kqemu_cpu_exec(CPUState *env)
#ifdef CONFIG_PROFILER
int64_t ti;
#endif
-
#ifdef _WIN32
DWORD temp;
#endif
@@ -652,35 +704,33 @@ int kqemu_cpu_exec(CPUState *env)
cpu_dump_state(env, logfile, fprintf, 0);
}
#endif
- memcpy(kenv->regs, env->regs, sizeof(kenv->regs));
+ for(i = 0; i < CPU_NB_REGS; i++)
+ kenv->regs[i] = env->regs[i];
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));
+ 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;
-#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__
+#ifdef TARGET_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];
kenv->dr0 = env->dr[0];
@@ -694,15 +744,11 @@ int kqemu_cpu_exec(CPUState *env)
cpl = (env->hflags & HF_CPL_MASK);
kenv->cpl = cpl;
kenv->nb_pages_to_flush = nb_pages_to_flush;
-#if KQEMU_VERSION >= 0x010200
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 KQEMU_VERSION >= 0x010300
kenv->nb_modified_ram_pages = nb_modified_ram_pages;
-#endif
+
kqemu_reset_modified_ram_pages();
if (env->cpuid_features & CPUID_FXSR)
@@ -720,41 +766,30 @@ int kqemu_cpu_exec(CPUState *env)
ret = -1;
}
#else
-#if KQEMU_VERSION >= 0x010100
ioctl(kqemu_fd, KQEMU_EXEC, kenv);
ret = kenv->retval;
-#else
- ret = ioctl(kqemu_fd, KQEMU_EXEC, kenv);
-#endif
#endif
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));
+ for(i = 0; i < CPU_NB_REGS; i++)
+ env->regs[i] = kenv->regs[i];
env->eip = kenv->eip;
env->eflags = kenv->eflags;
- memcpy(env->segs, kenv->segs, sizeof(env->segs));
+ for(i = 0; i < 6; i++)
+ kqemu_save_seg(&env->segs[i], &kenv->segs[i]);
cpu_x86_set_cpl(env, kenv->cpl);
- memcpy(&env->ldt, &kenv->ldt, sizeof(env->ldt));
-#if 0
- /* no need to restore that */
- 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->a20_mask = kenv->a20_mask;
-#endif
+ 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;
-#if KQEMU_VERSION >= 0x010300
-#ifdef __x86_64__
+#ifdef TARGET_X86_64
env->kernelgsbase = kenv->kernelgsbase;
#endif
-#endif
/* flush pages as indicated by kqemu */
if (kenv->nb_pages_to_flush >= KQEMU_FLUSH_ALL) {
@@ -771,13 +806,10 @@ int kqemu_cpu_exec(CPUState *env)
kqemu_exec_count++;
#endif
-#if KQEMU_VERSION >= 0x010200
if (kenv->nb_ram_pages_to_update > 0) {
cpu_tlb_update_dirty(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;
@@ -785,7 +817,6 @@ int kqemu_cpu_exec(CPUState *env)
tb_invalidate_phys_page_range(addr, addr + TARGET_PAGE_SIZE, 0);
}
}
-#endif
/* restore the hidden flags */
{
@@ -905,11 +936,85 @@ int kqemu_cpu_exec(CPUState *env)
void kqemu_cpu_interrupt(CPUState *env)
{
-#if defined(_WIN32) && KQEMU_VERSION >= 0x010101
+#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 *qpi_mem_read[3] = {
+ qpi_mem_readb,
+ qpi_mem_readw,
+ qpi_mem_readl,
+};
+
+static CPUWriteMemoryFunc *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(0,
+ qpi_mem_read,
+ qpi_mem_write, NULL);
+ cpu_register_physical_memory(kqemu_comm_base & ~0xfff,
+ 0x1000, qpi_io_memory);
+}
#endif
generated by cgit v1.2.3 (git 2.26.2) at 2024-12-18 14:35:22 +0000