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Diffstat (limited to 'kvm-all.c')
-rw-r--r--kvm-all.c247
1 files changed, 127 insertions, 120 deletions
diff --git a/kvm-all.c b/kvm-all.c
index 8f0e17cbf3..2ec9e0980d 100644
--- a/kvm-all.c
+++ b/kvm-all.c
@@ -63,9 +63,7 @@ struct KVMState
int fd;
int vmfd;
int coalesced_mmio;
-#ifdef KVM_CAP_COALESCED_MMIO
struct kvm_coalesced_mmio_ring *coalesced_mmio_ring;
-#endif
int broken_set_mem_region;
int migration_log;
int vcpu_events;
@@ -82,16 +80,24 @@ struct KVMState
static KVMState *kvm_state;
+static const KVMCapabilityInfo kvm_required_capabilites[] = {
+ KVM_CAP_INFO(USER_MEMORY),
+ KVM_CAP_INFO(DESTROY_MEMORY_REGION_WORKS),
+ KVM_CAP_LAST_INFO
+};
+
static KVMSlot *kvm_alloc_slot(KVMState *s)
{
int i;
for (i = 0; i < ARRAY_SIZE(s->slots); i++) {
/* KVM private memory slots */
- if (i >= 8 && i < 12)
+ if (i >= 8 && i < 12) {
continue;
- if (s->slots[i].memory_size == 0)
+ }
+ if (s->slots[i].memory_size == 0) {
return &s->slots[i];
+ }
}
fprintf(stderr, "%s: no free slot available\n", __func__);
@@ -225,11 +231,10 @@ int kvm_init_vcpu(CPUState *env)
goto err;
}
-#ifdef KVM_CAP_COALESCED_MMIO
- if (s->coalesced_mmio && !s->coalesced_mmio_ring)
- s->coalesced_mmio_ring = (void *) env->kvm_run +
- s->coalesced_mmio * PAGE_SIZE;
-#endif
+ if (s->coalesced_mmio && !s->coalesced_mmio_ring) {
+ s->coalesced_mmio_ring =
+ (void *)env->kvm_run + s->coalesced_mmio * PAGE_SIZE;
+ }
ret = kvm_arch_init_vcpu(env);
if (ret == 0) {
@@ -275,16 +280,14 @@ static int kvm_dirty_pages_log_change(target_phys_addr_t phys_addr,
int kvm_log_start(target_phys_addr_t phys_addr, ram_addr_t size)
{
- return kvm_dirty_pages_log_change(phys_addr, size,
- KVM_MEM_LOG_DIRTY_PAGES,
- KVM_MEM_LOG_DIRTY_PAGES);
+ return kvm_dirty_pages_log_change(phys_addr, size, KVM_MEM_LOG_DIRTY_PAGES,
+ KVM_MEM_LOG_DIRTY_PAGES);
}
int kvm_log_stop(target_phys_addr_t phys_addr, ram_addr_t size)
{
- return kvm_dirty_pages_log_change(phys_addr, size,
- 0,
- KVM_MEM_LOG_DIRTY_PAGES);
+ return kvm_dirty_pages_log_change(phys_addr, size, 0,
+ KVM_MEM_LOG_DIRTY_PAGES);
}
static int kvm_set_migration_log(int enable)
@@ -356,7 +359,7 @@ static int kvm_get_dirty_pages_log_range(unsigned long start_addr,
* @end_addr: end of logged region.
*/
static int kvm_physical_sync_dirty_bitmap(target_phys_addr_t start_addr,
- target_phys_addr_t end_addr)
+ target_phys_addr_t end_addr)
{
KVMState *s = kvm_state;
unsigned long size, allocated_size = 0;
@@ -400,7 +403,6 @@ static int kvm_physical_sync_dirty_bitmap(target_phys_addr_t start_addr,
int kvm_coalesce_mmio_region(target_phys_addr_t start, ram_addr_t size)
{
int ret = -ENOSYS;
-#ifdef KVM_CAP_COALESCED_MMIO
KVMState *s = kvm_state;
if (s->coalesced_mmio) {
@@ -411,7 +413,6 @@ int kvm_coalesce_mmio_region(target_phys_addr_t start, ram_addr_t size)
ret = kvm_vm_ioctl(s, KVM_REGISTER_COALESCED_MMIO, &zone);
}
-#endif
return ret;
}
@@ -419,7 +420,6 @@ int kvm_coalesce_mmio_region(target_phys_addr_t start, ram_addr_t size)
int kvm_uncoalesce_mmio_region(target_phys_addr_t start, ram_addr_t size)
{
int ret = -ENOSYS;
-#ifdef KVM_CAP_COALESCED_MMIO
KVMState *s = kvm_state;
if (s->coalesced_mmio) {
@@ -430,7 +430,6 @@ int kvm_uncoalesce_mmio_region(target_phys_addr_t start, ram_addr_t size)
ret = kvm_vm_ioctl(s, KVM_UNREGISTER_COALESCED_MMIO, &zone);
}
-#endif
return ret;
}
@@ -484,9 +483,20 @@ static int kvm_check_many_ioeventfds(void)
#endif
}
-static void kvm_set_phys_mem(target_phys_addr_t start_addr,
- ram_addr_t size,
- ram_addr_t phys_offset)
+static const KVMCapabilityInfo *
+kvm_check_extension_list(KVMState *s, const KVMCapabilityInfo *list)
+{
+ while (list->name) {
+ if (!kvm_check_extension(s, list->value)) {
+ return list;
+ }
+ list++;
+ }
+ return NULL;
+}
+
+static void kvm_set_phys_mem(target_phys_addr_t start_addr, ram_addr_t size,
+ ram_addr_t phys_offset)
{
KVMState *s = kvm_state;
ram_addr_t flags = phys_offset & ~TARGET_PAGE_MASK;
@@ -593,13 +603,13 @@ static void kvm_set_phys_mem(target_phys_addr_t start_addr,
}
/* in case the KVM bug workaround already "consumed" the new slot */
- if (!size)
+ if (!size) {
return;
-
+ }
/* KVM does not need to know about this memory */
- if (flags >= IO_MEM_UNASSIGNED)
+ if (flags >= IO_MEM_UNASSIGNED) {
return;
-
+ }
mem = kvm_alloc_slot(s);
mem->memory_size = size;
mem->start_addr = start_addr;
@@ -615,38 +625,38 @@ static void kvm_set_phys_mem(target_phys_addr_t start_addr,
}
static void kvm_client_set_memory(struct CPUPhysMemoryClient *client,
- target_phys_addr_t start_addr,
- ram_addr_t size,
- ram_addr_t phys_offset)
+ target_phys_addr_t start_addr,
+ ram_addr_t size, ram_addr_t phys_offset)
{
- kvm_set_phys_mem(start_addr, size, phys_offset);
+ kvm_set_phys_mem(start_addr, size, phys_offset);
}
static int kvm_client_sync_dirty_bitmap(struct CPUPhysMemoryClient *client,
- target_phys_addr_t start_addr,
- target_phys_addr_t end_addr)
+ target_phys_addr_t start_addr,
+ target_phys_addr_t end_addr)
{
- return kvm_physical_sync_dirty_bitmap(start_addr, end_addr);
+ return kvm_physical_sync_dirty_bitmap(start_addr, end_addr);
}
static int kvm_client_migration_log(struct CPUPhysMemoryClient *client,
- int enable)
+ int enable)
{
- return kvm_set_migration_log(enable);
+ return kvm_set_migration_log(enable);
}
static CPUPhysMemoryClient kvm_cpu_phys_memory_client = {
- .set_memory = kvm_client_set_memory,
- .sync_dirty_bitmap = kvm_client_sync_dirty_bitmap,
- .migration_log = kvm_client_migration_log,
+ .set_memory = kvm_client_set_memory,
+ .sync_dirty_bitmap = kvm_client_sync_dirty_bitmap,
+ .migration_log = kvm_client_migration_log,
};
-int kvm_init(int smp_cpus)
+int kvm_init(void)
{
static const char upgrade_note[] =
"Please upgrade to at least kernel 2.6.29 or recent kvm-kmod\n"
"(see http://sourceforge.net/projects/kvm).\n";
KVMState *s;
+ const KVMCapabilityInfo *missing_cap;
int ret;
int i;
@@ -655,9 +665,9 @@ int kvm_init(int smp_cpus)
#ifdef KVM_CAP_SET_GUEST_DEBUG
QTAILQ_INIT(&s->kvm_sw_breakpoints);
#endif
- for (i = 0; i < ARRAY_SIZE(s->slots); i++)
+ for (i = 0; i < ARRAY_SIZE(s->slots); i++) {
s->slots[i].slot = i;
-
+ }
s->vmfd = -1;
s->fd = qemu_open("/dev/kvm", O_RDWR);
if (s->fd == -1) {
@@ -668,8 +678,9 @@ int kvm_init(int smp_cpus)
ret = kvm_ioctl(s, KVM_GET_API_VERSION, 0);
if (ret < KVM_API_VERSION) {
- if (ret > 0)
+ if (ret > 0) {
ret = -EINVAL;
+ }
fprintf(stderr, "kvm version too old\n");
goto err;
}
@@ -689,39 +700,23 @@ int kvm_init(int smp_cpus)
goto err;
}
- /* initially, KVM allocated its own memory and we had to jump through
- * hooks to make phys_ram_base point to this. Modern versions of KVM
- * just use a user allocated buffer so we can use regular pages
- * unmodified. Make sure we have a sufficiently modern version of KVM.
- */
- if (!kvm_check_extension(s, KVM_CAP_USER_MEMORY)) {
- ret = -EINVAL;
- fprintf(stderr, "kvm does not support KVM_CAP_USER_MEMORY\n%s",
- upgrade_note);
- goto err;
+ missing_cap = kvm_check_extension_list(s, kvm_required_capabilites);
+ if (!missing_cap) {
+ missing_cap =
+ kvm_check_extension_list(s, kvm_arch_required_capabilities);
}
-
- /* There was a nasty bug in < kvm-80 that prevents memory slots from being
- * destroyed properly. Since we rely on this capability, refuse to work
- * with any kernel without this capability. */
- if (!kvm_check_extension(s, KVM_CAP_DESTROY_MEMORY_REGION_WORKS)) {
+ if (missing_cap) {
ret = -EINVAL;
-
- fprintf(stderr,
- "KVM kernel module broken (DESTROY_MEMORY_REGION).\n%s",
- upgrade_note);
+ fprintf(stderr, "kvm does not support %s\n%s",
+ missing_cap->name, upgrade_note);
goto err;
}
- s->coalesced_mmio = 0;
-#ifdef KVM_CAP_COALESCED_MMIO
s->coalesced_mmio = kvm_check_extension(s, KVM_CAP_COALESCED_MMIO);
- s->coalesced_mmio_ring = NULL;
-#endif
s->broken_set_mem_region = 1;
#ifdef KVM_CAP_JOIN_MEMORY_REGIONS_WORKS
- ret = kvm_ioctl(s, KVM_CHECK_EXTENSION, KVM_CAP_JOIN_MEMORY_REGIONS_WORKS);
+ ret = kvm_check_extension(s, KVM_CAP_JOIN_MEMORY_REGIONS_WORKS);
if (ret > 0) {
s->broken_set_mem_region = 0;
}
@@ -753,9 +748,10 @@ int kvm_init(int smp_cpus)
s->xcrs = kvm_check_extension(s, KVM_CAP_XCRS);
#endif
- ret = kvm_arch_init(s, smp_cpus);
- if (ret < 0)
+ ret = kvm_arch_init(s);
+ if (ret < 0) {
goto err;
+ }
kvm_state = s;
cpu_register_phys_memory_client(&kvm_cpu_phys_memory_client);
@@ -766,10 +762,12 @@ int kvm_init(int smp_cpus)
err:
if (s) {
- if (s->vmfd != -1)
+ if (s->vmfd != -1) {
close(s->vmfd);
- if (s->fd != -1)
+ }
+ if (s->fd != -1) {
close(s->fd);
+ }
}
qemu_free(s);
@@ -816,36 +814,36 @@ static int kvm_handle_io(uint16_t port, void *data, int direction, int size,
}
#ifdef KVM_CAP_INTERNAL_ERROR_DATA
-static void kvm_handle_internal_error(CPUState *env, struct kvm_run *run)
+static int kvm_handle_internal_error(CPUState *env, struct kvm_run *run)
{
-
+ fprintf(stderr, "KVM internal error.");
if (kvm_check_extension(kvm_state, KVM_CAP_INTERNAL_ERROR_DATA)) {
int i;
- fprintf(stderr, "KVM internal error. Suberror: %d\n",
- run->internal.suberror);
-
+ fprintf(stderr, " Suberror: %d\n", run->internal.suberror);
for (i = 0; i < run->internal.ndata; ++i) {
fprintf(stderr, "extra data[%d]: %"PRIx64"\n",
i, (uint64_t)run->internal.data[i]);
}
+ } else {
+ fprintf(stderr, "\n");
}
- cpu_dump_state(env, stderr, fprintf, 0);
if (run->internal.suberror == KVM_INTERNAL_ERROR_EMULATION) {
fprintf(stderr, "emulation failure\n");
- if (!kvm_arch_stop_on_emulation_error(env))
- return;
+ if (!kvm_arch_stop_on_emulation_error(env)) {
+ cpu_dump_state(env, stderr, fprintf, CPU_DUMP_CODE);
+ return 0;
+ }
}
/* FIXME: Should trigger a qmp message to let management know
* something went wrong.
*/
- vm_stop(0);
+ return -1;
}
#endif
void kvm_flush_coalesced_mmio_buffer(void)
{
-#ifdef KVM_CAP_COALESCED_MMIO
KVMState *s = kvm_state;
if (s->coalesced_mmio_ring) {
struct kvm_coalesced_mmio_ring *ring = s->coalesced_mmio_ring;
@@ -859,7 +857,6 @@ void kvm_flush_coalesced_mmio_buffer(void)
ring->first = (ring->first + 1) % KVM_COALESCED_MMIO_MAX;
}
}
-#endif
}
static void do_kvm_cpu_synchronize_state(void *_env)
@@ -874,8 +871,9 @@ static void do_kvm_cpu_synchronize_state(void *_env)
void kvm_cpu_synchronize_state(CPUState *env)
{
- if (!env->kvm_vcpu_dirty)
+ if (!env->kvm_vcpu_dirty) {
run_on_cpu(env, do_kvm_cpu_synchronize_state, env);
+ }
}
void kvm_cpu_synchronize_post_reset(CPUState *env)
@@ -924,6 +922,8 @@ int kvm_cpu_exec(CPUState *env)
cpu_single_env = env;
kvm_arch_post_run(env, run);
+ kvm_flush_coalesced_mmio_buffer();
+
if (ret == -EINTR || ret == -EAGAIN) {
cpu_exit(env);
DPRINTF("io window exit\n");
@@ -936,8 +936,6 @@ int kvm_cpu_exec(CPUState *env)
abort();
}
- kvm_flush_coalesced_mmio_buffer();
-
ret = 0; /* exit loop */
switch (run->exit_reason) {
case KVM_EXIT_IO:
@@ -965,17 +963,13 @@ int kvm_cpu_exec(CPUState *env)
ret = 1;
break;
case KVM_EXIT_UNKNOWN:
- DPRINTF("kvm_exit_unknown\n");
- break;
- case KVM_EXIT_FAIL_ENTRY:
- DPRINTF("kvm_exit_fail_entry\n");
- break;
- case KVM_EXIT_EXCEPTION:
- DPRINTF("kvm_exit_exception\n");
+ fprintf(stderr, "KVM: unknown exit, hardware reason %" PRIx64 "\n",
+ (uint64_t)run->hw.hardware_exit_reason);
+ ret = -1;
break;
#ifdef KVM_CAP_INTERNAL_ERROR_DATA
case KVM_EXIT_INTERNAL_ERROR:
- kvm_handle_internal_error(env, run);
+ ret = kvm_handle_internal_error(env, run);
break;
#endif
case KVM_EXIT_DEBUG:
@@ -996,6 +990,11 @@ int kvm_cpu_exec(CPUState *env)
}
} while (ret > 0);
+ if (ret < 0) {
+ cpu_dump_state(env, stderr, fprintf, CPU_DUMP_CODE);
+ vm_stop(0);
+ env->exit_request = 1;
+ }
if (env->exit_request) {
env->exit_request = 0;
env->exception_index = EXCP_INTERRUPT;
@@ -1015,9 +1014,9 @@ int kvm_ioctl(KVMState *s, int type, ...)
va_end(ap);
ret = ioctl(s->fd, type, arg);
- if (ret == -1)
+ if (ret == -1) {
ret = -errno;
-
+ }
return ret;
}
@@ -1032,9 +1031,9 @@ int kvm_vm_ioctl(KVMState *s, int type, ...)
va_end(ap);
ret = ioctl(s->vmfd, type, arg);
- if (ret == -1)
+ if (ret == -1) {
ret = -errno;
-
+ }
return ret;
}
@@ -1049,21 +1048,15 @@ int kvm_vcpu_ioctl(CPUState *env, int type, ...)
va_end(ap);
ret = ioctl(env->kvm_fd, type, arg);
- if (ret == -1)
+ if (ret == -1) {
ret = -errno;
-
+ }
return ret;
}
int kvm_has_sync_mmu(void)
{
-#ifdef KVM_CAP_SYNC_MMU
- KVMState *s = kvm_state;
-
- return kvm_check_extension(s, KVM_CAP_SYNC_MMU);
-#else
- return 0;
-#endif
+ return kvm_check_extension(kvm_state, KVM_CAP_SYNC_MMU);
}
int kvm_has_vcpu_events(void)
@@ -1120,8 +1113,9 @@ struct kvm_sw_breakpoint *kvm_find_sw_breakpoint(CPUState *env,
struct kvm_sw_breakpoint *bp;
QTAILQ_FOREACH(bp, &env->kvm_state->kvm_sw_breakpoints, entry) {
- if (bp->pc == pc)
+ if (bp->pc == pc) {
return bp;
+ }
}
return NULL;
}
@@ -1176,8 +1170,9 @@ int kvm_insert_breakpoint(CPUState *current_env, target_ulong addr,
}
bp = qemu_malloc(sizeof(struct kvm_sw_breakpoint));
- if (!bp)
+ if (!bp) {
return -ENOMEM;
+ }
bp->pc = addr;
bp->use_count = 1;
@@ -1191,14 +1186,16 @@ int kvm_insert_breakpoint(CPUState *current_env, target_ulong addr,
bp, entry);
} else {
err = kvm_arch_insert_hw_breakpoint(addr, len, type);
- if (err)
+ if (err) {
return err;
+ }
}
for (env = first_cpu; env != NULL; env = env->next_cpu) {
err = kvm_update_guest_debug(env, 0);
- if (err)
+ if (err) {
return err;
+ }
}
return 0;
}
@@ -1212,8 +1209,9 @@ int kvm_remove_breakpoint(CPUState *current_env, target_ulong addr,
if (type == GDB_BREAKPOINT_SW) {
bp = kvm_find_sw_breakpoint(current_env, addr);
- if (!bp)
+ if (!bp) {
return -ENOENT;
+ }
if (bp->use_count > 1) {
bp->use_count--;
@@ -1221,21 +1219,24 @@ int kvm_remove_breakpoint(CPUState *current_env, target_ulong addr,
}
err = kvm_arch_remove_sw_breakpoint(current_env, bp);
- if (err)
+ if (err) {
return err;
+ }
QTAILQ_REMOVE(&current_env->kvm_state->kvm_sw_breakpoints, bp, entry);
qemu_free(bp);
} else {
err = kvm_arch_remove_hw_breakpoint(addr, len, type);
- if (err)
+ if (err) {
return err;
+ }
}
for (env = first_cpu; env != NULL; env = env->next_cpu) {
err = kvm_update_guest_debug(env, 0);
- if (err)
+ if (err) {
return err;
+ }
}
return 0;
}
@@ -1250,15 +1251,17 @@ void kvm_remove_all_breakpoints(CPUState *current_env)
if (kvm_arch_remove_sw_breakpoint(current_env, bp) != 0) {
/* Try harder to find a CPU that currently sees the breakpoint. */
for (env = first_cpu; env != NULL; env = env->next_cpu) {
- if (kvm_arch_remove_sw_breakpoint(env, bp) == 0)
+ if (kvm_arch_remove_sw_breakpoint(env, bp) == 0) {
break;
+ }
}
}
}
kvm_arch_remove_all_hw_breakpoints();
- for (env = first_cpu; env != NULL; env = env->next_cpu)
+ for (env = first_cpu; env != NULL; env = env->next_cpu) {
kvm_update_guest_debug(env, 0);
+ }
}
#else /* !KVM_CAP_SET_GUEST_DEBUG */
@@ -1290,8 +1293,9 @@ int kvm_set_signal_mask(CPUState *env, const sigset_t *sigset)
struct kvm_signal_mask *sigmask;
int r;
- if (!sigset)
+ if (!sigset) {
return kvm_vcpu_ioctl(env, KVM_SET_SIGNAL_MASK, NULL);
+ }
sigmask = qemu_malloc(sizeof(*sigmask) + sizeof(*sigset));
@@ -1346,13 +1350,16 @@ int kvm_set_ioeventfd_pio_word(int fd, uint16_t addr, uint16_t val, bool assign)
.fd = fd,
};
int r;
- if (!kvm_enabled())
+ if (!kvm_enabled()) {
return -ENOSYS;
- if (!assign)
+ }
+ if (!assign) {
kick.flags |= KVM_IOEVENTFD_FLAG_DEASSIGN;
+ }
r = kvm_vm_ioctl(kvm_state, KVM_IOEVENTFD, &kick);
- if (r < 0)
+ if (r < 0) {
return r;
+ }
return 0;
#else
return -ENOSYS;
generated by cgit v1.2.3 (git 2.26.2) at 2024-12-02 02:03:27 +0000