Prepare for more qemu-kvm merging

index 35fc73c..2538283 100644
@@ -82,10 +82,12 @@ static KVMSlot *kvm_alloc_slot(KVMState *s)
 
     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__);

@@ -220,9 +222,10 @@ int kvm_init_vcpu(CPUState *env)
     }
 
 #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;
+    if (s->coalesced_mmio && !s->coalesced_mmio_ring) {
+        s->coalesced_mmio_ring =
+            (void *)env->kvm_run + s->coalesced_mmio * PAGE_SIZE;
+    }
 #endif
 
     ret = kvm_arch_init_vcpu(env);

@@ -269,16 +272,14 @@ 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)

@@ -350,7 +351,7 @@ 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;

@@ -441,9 +442,8 @@ int kvm_check_extension(KVMState *s, unsigned int extension)
     return ret;
 }
 
-static void kvm_set_phys_mem(target_phys_addr_t start_addr,
-			     ram_addr_t size,
-			     ram_addr_t phys_offset)
+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;

@@ -550,13 +550,13 @@ 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;

@@ -572,30 +572,29 @@ 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)

@@ -612,9 +611,9 @@ 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) {

@@ -625,8 +624,9 @@ 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;
     }

@@ -711,8 +711,9 @@ int kvm_init(int smp_cpus)
 #endif
 
     ret = kvm_arch_init(s, smp_cpus);
-    if (ret < 0)
+    if (ret < 0) {
         goto err;
+    }
 
     kvm_state = s;
     cpu_register_phys_memory_client(&kvm_cpu_phys_memory_client);

@@ -721,10 +722,12 @@ 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);
 

@@ -788,8 +791,9 @@ static void kvm_handle_internal_error(CPUState *env, struct kvm_run *run)
     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)) {
+            return;
+        }
     }
     /* FIXME: Should trigger a qmp message to let management know
      * something went wrong.

@@ -829,8 +833,9 @@ 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)

@@ -970,9 +975,9 @@ 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;
 }
 

@@ -987,9 +992,9 @@ 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;
 }
 

@@ -1004,9 +1009,9 @@ 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;
 }
 

@@ -1067,8 +1072,9 @@ 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;
 }

@@ -1123,8 +1129,9 @@ 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;

@@ -1138,14 +1145,16 @@ 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;
 }

@@ -1159,8 +1168,9 @@ 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--;

@@ -1168,21 +1178,24 @@ 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;
 }

@@ -1197,15 +1210,17 @@ 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 */

@@ -1237,8 +1252,9 @@ 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));
 

@@ -1293,13 +1309,16 @@ 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;

index 2538283..7518f2c 100644
@@ -850,7 +850,7 @@ void kvm_cpu_synchronize_post_init(CPUState *env)
     env->kvm_vcpu_dirty = 0;
 }
 
-int kvm_cpu_exec(CPUState *env)
+void kvm_cpu_exec(CPUState *env)
 {
     struct kvm_run *run = env->kvm_run;
     int ret;

@@ -943,7 +943,7 @@ int kvm_cpu_exec(CPUState *env)
 #ifdef KVM_CAP_SET_GUEST_DEBUG
             if (kvm_arch_debug(&run->debug.arch)) {
                 env->exception_index = EXCP_DEBUG;
-                return 0;
+                return;
             }
             /* re-enter, this exception was guest-internal */
             ret = 1;

@@ -960,8 +960,6 @@ int kvm_cpu_exec(CPUState *env)
         env->exit_request = 0;
         env->exception_index = EXCP_INTERRUPT;
     }
-
-    return ret;
 }
 
 int kvm_ioctl(KVMState *s, int type, ...)

index 5384a4b..352c6a6 100644
@@ -79,9 +79,9 @@ void kvm_cpu_synchronize_post_init(CPUState *env)
 {
 }
 
-int kvm_cpu_exec(CPUState *env)
+void kvm_cpu_exec(CPUState *env)
 {
-    abort ();
+    abort();
 }
 
 int kvm_has_sync_mmu(void)

index 60a9b42..51ad56f 100644
@@ -46,7 +46,7 @@ int kvm_has_xcrs(void);
 #ifdef NEED_CPU_H
 int kvm_init_vcpu(CPUState *env);
 
-int kvm_cpu_exec(CPUState *env);
+void kvm_cpu_exec(CPUState *env);
 
 #if !defined(CONFIG_USER_ONLY)
 int kvm_log_start(target_phys_addr_t phys_addr, ram_addr_t size);

index 7518f2c..a46a3b6 100644
@@ -774,7 +774,7 @@ 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)
 {
 
     if (kvm_check_extension(kvm_state, KVM_CAP_INTERNAL_ERROR_DATA)) {

@@ -792,13 +792,13 @@ static void kvm_handle_internal_error(CPUState *env, struct kvm_run *run)
     if (run->internal.suberror == KVM_INTERNAL_ERROR_EMULATION) {
         fprintf(stderr, "emulation failure\n");
         if (!kvm_arch_stop_on_emulation_error(env)) {
-            return;
+            return 0;
         }
     }
     /* FIXME: Should trigger a qmp message to let management know
      * something went wrong.
      */
-    vm_stop(0);
+    return -1;
 }
 #endif
 

@@ -926,16 +926,19 @@ void kvm_cpu_exec(CPUState *env)
             break;
         case KVM_EXIT_UNKNOWN:
             DPRINTF("kvm_exit_unknown\n");
+            ret = -1;
             break;
         case KVM_EXIT_FAIL_ENTRY:
             DPRINTF("kvm_exit_fail_entry\n");
+            ret = -1;
             break;
         case KVM_EXIT_EXCEPTION:
             DPRINTF("kvm_exit_exception\n");
+            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:

@@ -956,6 +959,10 @@ void kvm_cpu_exec(CPUState *env)
         }
     } while (ret > 0);
 
+    if (ret < 0) {
+        vm_stop(0);
+        env->exit_request = 1;
+    }
     if (env->exit_request) {
         env->exit_request = 0;
         env->exception_index = EXCP_INTERRUPT;

index fda07d2..2431a1f 100644
@@ -1534,6 +1534,10 @@ int kvm_arch_handle_exit(CPUState *env, struct kvm_run *run)
         DPRINTF("handle_hlt\n");
         ret = kvm_handle_halt(env);
         break;
+    default:
+        fprintf(stderr, "KVM: unknown exit reason %d\n", run->exit_reason);
+        ret = -1;
+        break;
     }
 
     return ret;

index 5caa07c..849b404 100644
@@ -307,6 +307,10 @@ int kvm_arch_handle_exit(CPUState *env, struct kvm_run *run)
         dprintf("handle halt\n");
         ret = kvmppc_handle_halt(env);
         break;
+    default:
+        fprintf(stderr, "KVM: unknown exit reason %d\n", run->exit_reason);
+        ret = -1;
+        break;
     }
 
     return ret;

index a46a3b6..ad1d0a8 100644
@@ -776,22 +776,22 @@ static int kvm_handle_io(uint16_t port, void *data, int direction, int size,
 #ifdef KVM_CAP_INTERNAL_ERROR_DATA
 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)) {
+            cpu_dump_state(env, stderr, fprintf, 0);
             return 0;
         }
     }

@@ -925,15 +925,8 @@ void kvm_cpu_exec(CPUState *env)
             ret = 1;
             break;
         case KVM_EXIT_UNKNOWN:
-            DPRINTF("kvm_exit_unknown\n");
-            ret = -1;
-            break;
-        case KVM_EXIT_FAIL_ENTRY:
-            DPRINTF("kvm_exit_fail_entry\n");
-            ret = -1;
-            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

@@ -960,6 +953,7 @@ void kvm_cpu_exec(CPUState *env)
     } while (ret > 0);
 
     if (ret < 0) {
+        cpu_dump_state(env, stderr, fprintf, 0);
         vm_stop(0);
         env->exit_request = 1;
     }

index dddcd74..a457423 100644
@@ -874,6 +874,8 @@ void cpu_x86_cpuid(CPUX86State *env, uint32_t index, uint32_t count,
                    uint32_t *ecx, uint32_t *edx);
 int cpu_x86_register (CPUX86State *env, const char *cpu_model);
 void cpu_clear_apic_feature(CPUX86State *env);
+void host_cpuid(uint32_t function, uint32_t count,
+                uint32_t *eax, uint32_t *ebx, uint32_t *ecx, uint32_t *edx);
 
 /* helper.c */
 int cpu_x86_handle_mmu_fault(CPUX86State *env, target_ulong addr,

index 165045e..5382a28 100644
@@ -103,9 +103,8 @@ typedef struct model_features_t {
 int check_cpuid = 0;
 int enforce_cpuid = 0;
 
-static void host_cpuid(uint32_t function, uint32_t count,
-                       uint32_t *eax, uint32_t *ebx,
-                       uint32_t *ecx, uint32_t *edx)
+void host_cpuid(uint32_t function, uint32_t count,
+                uint32_t *eax, uint32_t *ebx, uint32_t *ecx, uint32_t *edx)
 {
 #if defined(CONFIG_KVM)
     uint32_t vec[4];

index 2431a1f..d4f253e 100644
@@ -1525,8 +1525,19 @@ static int kvm_handle_halt(CPUState *env)
     return 1;
 }
 
+static bool host_supports_vmx(void)
+{
+    uint32_t ecx, unused;
+
+    host_cpuid(1, 0, &unused, &unused, &ecx, &unused);
+    return ecx & CPUID_EXT_VMX;
+}
+
+#define VMX_INVALID_GUEST_STATE 0x80000021
+
 int kvm_arch_handle_exit(CPUState *env, struct kvm_run *run)
 {
+    uint64_t code;
     int ret = 0;
 
     switch (run->exit_reason) {

@@ -1534,6 +1545,28 @@ int kvm_arch_handle_exit(CPUState *env, struct kvm_run *run)
         DPRINTF("handle_hlt\n");
         ret = kvm_handle_halt(env);
         break;
+    case KVM_EXIT_FAIL_ENTRY:
+        code = run->fail_entry.hardware_entry_failure_reason;
+        fprintf(stderr, "KVM: entry failed, hardware error 0x%" PRIx64 "\n",
+                code);
+        if (host_supports_vmx() && code == VMX_INVALID_GUEST_STATE) {
+            fprintf(stderr,
+                    "\nIf you're runnning a guest on an Intel machine without "
+                        "unrestricted mode\n"
+                    "support, the failure can be most likely due to the guest "
+                        "entering an invalid\n"
+                    "state for Intel VT. For example, the guest maybe running "
+                        "in big real mode\n"
+                    "which is not supported on less recent Intel processors."
+                        "\n\n");
+        }
+        ret = -1;
+        break;
+    case KVM_EXIT_EXCEPTION:
+        fprintf(stderr, "KVM: exception %d exit (error code 0x%x)\n",
+                run->ex.exception, run->ex.error_code);
+        ret = -1;
+        break;
     default:
         fprintf(stderr, "KVM: unknown exit reason %d\n", run->exit_reason);
         ret = -1;

index 4ce4e83..ffbd6a4 100644
@@ -765,6 +765,8 @@ int page_check_range(target_ulong start, target_ulong len, int flags);
 CPUState *cpu_copy(CPUState *env);
 CPUState *qemu_get_cpu(int cpu);
 
+#define CPU_DUMP_CODE 0x00010000
+
 void cpu_dump_state(CPUState *env, FILE *f, fprintf_function cpu_fprintf,
                     int flags);
 void cpu_dump_statistics(CPUState *env, FILE *f, fprintf_function cpu_fprintf,

index ad1d0a8..ef2ca3b 100644
@@ -791,7 +791,7 @@ static int kvm_handle_internal_error(CPUState *env, struct kvm_run *run)
     if (run->internal.suberror == KVM_INTERNAL_ERROR_EMULATION) {
         fprintf(stderr, "emulation failure\n");
         if (!kvm_arch_stop_on_emulation_error(env)) {
-            cpu_dump_state(env, stderr, fprintf, 0);
+            cpu_dump_state(env, stderr, fprintf, CPU_DUMP_CODE);
             return 0;
         }
     }

@@ -953,7 +953,7 @@ void kvm_cpu_exec(CPUState *env)
     } while (ret > 0);
 
     if (ret < 0) {
-        cpu_dump_state(env, stderr, fprintf, 0);
+        cpu_dump_state(env, stderr, fprintf, CPU_DUMP_CODE);
         vm_stop(0);
         env->exit_request = 1;
     }

index adf9542..1ab42c3 100644
@@ -249,6 +249,9 @@ done:
     cpu_fprintf(f, "\n");
 }
 
+#define DUMP_CODE_BYTES_TOTAL    50
+#define DUMP_CODE_BYTES_BACKWARD 20
+
 void cpu_dump_state(CPUState *env, FILE *f, fprintf_function cpu_fprintf,
                     int flags)
 {

@@ -434,6 +437,24 @@ void cpu_dump_state(CPUState *env, FILE *f, fprintf_function cpu_fprintf,
                 cpu_fprintf(f, " ");
         }
     }
+    if (flags & CPU_DUMP_CODE) {
+        target_phys_addr_t base = env->segs[R_CS].base + env->eip;
+        target_phys_addr_t offs = MIN(env->eip, DUMP_CODE_BYTES_BACKWARD);
+        uint8_t code;
+        char codestr[3];
+
+        cpu_fprintf(f, "Code=");
+        for (i = 0; i < DUMP_CODE_BYTES_TOTAL; i++) {
+            if (cpu_memory_rw_debug(env, base - offs + i, &code, 1, 0) == 0) {
+                snprintf(codestr, sizeof(codestr), "%02x", code);
+            } else {
+                snprintf(codestr, sizeof(codestr), "??");
+            }
+            cpu_fprintf(f, "%s%s%s%s", i > 0 ? " ": "",
+                        i == offs ? "<" : "", codestr, i == offs ? ">" : "");
+        }
+        cpu_fprintf(f, "\n");
+    }
 }
 
 /***********************************************************/

index 4ce4e83..ffbd6a4 100644
@@ -765,6 +765,8 @@ int page_check_range(target_ulong start, target_ulong len, int flags);
 CPUState *cpu_copy(CPUState *env);
 CPUState *qemu_get_cpu(int cpu);
 
+#define CPU_DUMP_CODE 0x00010000
+
 void cpu_dump_state(CPUState *env, FILE *f, fprintf_function cpu_fprintf,
                     int flags);
 void cpu_dump_statistics(CPUState *env, FILE *f, fprintf_function cpu_fprintf,

index ad1d0a8..ef2ca3b 100644
@@ -791,7 +791,7 @@ static int kvm_handle_internal_error(CPUState *env, struct kvm_run *run)
     if (run->internal.suberror == KVM_INTERNAL_ERROR_EMULATION) {
         fprintf(stderr, "emulation failure\n");
         if (!kvm_arch_stop_on_emulation_error(env)) {
-            cpu_dump_state(env, stderr, fprintf, 0);
+            cpu_dump_state(env, stderr, fprintf, CPU_DUMP_CODE);
             return 0;
         }
     }

@@ -953,7 +953,7 @@ void kvm_cpu_exec(CPUState *env)
     } while (ret > 0);
 
     if (ret < 0) {
-        cpu_dump_state(env, stderr, fprintf, 0);
+        cpu_dump_state(env, stderr, fprintf, CPU_DUMP_CODE);
         vm_stop(0);
         env->exit_request = 1;
     }

index adf9542..fa37da3 100644
@@ -249,6 +249,9 @@ done:
     cpu_fprintf(f, "\n");
 }
 
+#define DUMP_CODE_BYTES_TOTAL    50
+#define DUMP_CODE_BYTES_BACKWARD 20
+
 void cpu_dump_state(CPUState *env, FILE *f, fprintf_function cpu_fprintf,
                     int flags)
 {

@@ -434,6 +437,24 @@ void cpu_dump_state(CPUState *env, FILE *f, fprintf_function cpu_fprintf,
                 cpu_fprintf(f, " ");
         }
     }
+    if (flags & CPU_DUMP_CODE) {
+        target_ulong base = env->segs[R_CS].base + env->eip;
+        target_ulong offs = MIN(env->eip, DUMP_CODE_BYTES_BACKWARD);
+        uint8_t code;
+        char codestr[3];
+
+        cpu_fprintf(f, "Code=");
+        for (i = 0; i < DUMP_CODE_BYTES_TOTAL; i++) {
+            if (cpu_memory_rw_debug(env, base - offs + i, &code, 1, 0) == 0) {
+                snprintf(codestr, sizeof(codestr), "%02x", code);
+            } else {
+                snprintf(codestr, sizeof(codestr), "??");
+            }
+            cpu_fprintf(f, "%s%s%s%s", i > 0 ? " ": "",
+                        i == offs ? "<" : "", codestr, i == offs ? ">" : "");
+        }
+        cpu_fprintf(f, "\n");
+    }
 }
 
 /***********************************************************/

index d4f253e..684430f 100644
@@ -1388,12 +1388,12 @@ int kvm_arch_put_registers(CPUState *env, int level)
     if (ret < 0) {
         return ret;
     }
-    /* must be last */
-    ret = kvm_guest_debug_workarounds(env);
+    ret = kvm_put_debugregs(env);
     if (ret < 0) {
         return ret;
     }
-    ret = kvm_put_debugregs(env);
+    /* must be last */
+    ret = kvm_guest_debug_workarounds(env);
     if (ret < 0) {
         return ret;
     }

index 684430f..30aa51c 100644
@@ -1198,6 +1198,9 @@ static int kvm_get_mp_state(CPUState *env)
         return ret;
     }
     env->mp_state = mp_state.mp_state;
+    if (kvm_irqchip_in_kernel()) {
+        env->halted = (mp_state.mp_state == KVM_MP_STATE_HALTED);
+    }
     return 0;
 }
 

index 30aa51c..1403327 100644
@@ -321,8 +321,6 @@ int kvm_arch_init_vcpu(CPUState *env)
     uint32_t signature[3];
 #endif
 
-    env->mp_state = KVM_MP_STATE_RUNNABLE;
-
     env->cpuid_features &= kvm_arch_get_supported_cpuid(env, 1, 0, R_EDX);
 
     i = env->cpuid_ext_features & CPUID_EXT_HYPERVISOR;

index 1403327..e46b901 100644
@@ -450,6 +450,7 @@ void kvm_arch_reset_vcpu(CPUState *env)
     env->interrupt_injected = -1;
     env->nmi_injected = 0;
     env->nmi_pending = 0;
+    env->xcr0 = 1;
     if (kvm_irqchip_in_kernel()) {
         env->mp_state = cpu_is_bsp(env) ? KVM_MP_STATE_RUNNABLE :
                                           KVM_MP_STATE_UNINITIALIZED;

@@ -1756,8 +1757,6 @@ void kvm_arch_update_guest_debug(CPUState *env, struct kvm_guest_debug *dbg)
                 ((uint32_t)len_code[hw_breakpoint[n].len] << (18 + n*4));
         }
     }
-    /* Legal xcr0 for loading */
-    env->xcr0 = 1;
 }
 #endif /* KVM_CAP_SET_GUEST_DEBUG */
 

index e46b901..d8f26bf 100644
@@ -54,6 +54,8 @@
 #define BUS_MCEERR_AO 5
 #endif
 
+static bool has_msr_star;
+static bool has_msr_hsave_pa;
 static int lm_capable_kernel;
 
 #ifdef KVM_CAP_EXT_CPUID

@@ -459,13 +461,10 @@ void kvm_arch_reset_vcpu(CPUState *env)
     }
 }
 
-int has_msr_star;
-int has_msr_hsave_pa;
-
-static void kvm_supported_msrs(CPUState *env)
+static int kvm_get_supported_msrs(KVMState *s)
 {
     static int kvm_supported_msrs;
-    int ret;
+    int ret = 0;
 
     /* first time */
     if (kvm_supported_msrs == 0) {

@@ -476,9 +475,9 @@ static void kvm_supported_msrs(CPUState *env)
         /* Obtain MSR list from KVM.  These are the MSRs that we must
          * save/restore */
         msr_list.nmsrs = 0;
-        ret = kvm_ioctl(env->kvm_state, KVM_GET_MSR_INDEX_LIST, &msr_list);
+        ret = kvm_ioctl(s, KVM_GET_MSR_INDEX_LIST, &msr_list);
         if (ret < 0 && ret != -E2BIG) {
-            return;
+            return ret;
         }
         /* Old kernel modules had a bug and could write beyond the provided
            memory. Allocate at least a safe amount of 1K. */

@@ -487,17 +486,17 @@ static void kvm_supported_msrs(CPUState *env)
                                               sizeof(msr_list.indices[0])));
 
         kvm_msr_list->nmsrs = msr_list.nmsrs;
-        ret = kvm_ioctl(env->kvm_state, KVM_GET_MSR_INDEX_LIST, kvm_msr_list);
+        ret = kvm_ioctl(s, KVM_GET_MSR_INDEX_LIST, kvm_msr_list);
         if (ret >= 0) {
             int i;
 
             for (i = 0; i < kvm_msr_list->nmsrs; i++) {
                 if (kvm_msr_list->indices[i] == MSR_STAR) {
-                    has_msr_star = 1;
+                    has_msr_star = true;
                     continue;
                 }
                 if (kvm_msr_list->indices[i] == MSR_VM_HSAVE_PA) {
-                    has_msr_hsave_pa = 1;
+                    has_msr_hsave_pa = true;
                     continue;
                 }
             }

@@ -506,19 +505,7 @@ static void kvm_supported_msrs(CPUState *env)
         free(kvm_msr_list);
     }
 
-    return;
-}
-
-static int kvm_has_msr_hsave_pa(CPUState *env)
-{
-    kvm_supported_msrs(env);
-    return has_msr_hsave_pa;
-}
-
-static int kvm_has_msr_star(CPUState *env)
-{
-    kvm_supported_msrs(env);
-    return has_msr_star;
+    return ret;
 }
 
 static int kvm_init_identity_map_page(KVMState *s)

@@ -543,9 +530,13 @@ static int kvm_init_identity_map_page(KVMState *s)
 int kvm_arch_init(KVMState *s, int smp_cpus)
 {
     int ret;
-
     struct utsname utsname;
 
+    ret = kvm_get_supported_msrs(s);
+    if (ret < 0) {
+        return ret;
+    }
+
     uname(&utsname);
     lm_capable_kernel = strcmp(utsname.machine, "x86_64") == 0;
 

@@ -830,10 +821,10 @@ static int kvm_put_msrs(CPUState *env, int level)
     kvm_msr_entry_set(&msrs[n++], MSR_IA32_SYSENTER_CS, env->sysenter_cs);
     kvm_msr_entry_set(&msrs[n++], MSR_IA32_SYSENTER_ESP, env->sysenter_esp);
     kvm_msr_entry_set(&msrs[n++], MSR_IA32_SYSENTER_EIP, env->sysenter_eip);
-    if (kvm_has_msr_star(env)) {
+    if (has_msr_star) {
         kvm_msr_entry_set(&msrs[n++], MSR_STAR, env->star);
     }
-    if (kvm_has_msr_hsave_pa(env)) {
+    if (has_msr_hsave_pa) {
         kvm_msr_entry_set(&msrs[n++], MSR_VM_HSAVE_PA, env->vm_hsave);
     }
 #ifdef TARGET_X86_64

@@ -1076,10 +1067,10 @@ static int kvm_get_msrs(CPUState *env)
     msrs[n++].index = MSR_IA32_SYSENTER_CS;
     msrs[n++].index = MSR_IA32_SYSENTER_ESP;
     msrs[n++].index = MSR_IA32_SYSENTER_EIP;
-    if (kvm_has_msr_star(env)) {
+    if (has_msr_star) {
         msrs[n++].index = MSR_STAR;
     }
-    if (kvm_has_msr_hsave_pa(env)) {
+    if (has_msr_hsave_pa) {
         msrs[n++].index = MSR_VM_HSAVE_PA;
     }
     msrs[n++].index = MSR_IA32_TSC;

index d8f26bf..664a4a0 100644
@@ -453,6 +453,9 @@ void kvm_arch_reset_vcpu(CPUState *env)
     env->nmi_injected = 0;
     env->nmi_pending = 0;
     env->xcr0 = 1;
+    env->system_time_msr = 0;
+    env->wall_clock_msr = 0;
+    env->async_pf_en_msr = 0;
     if (kvm_irqchip_in_kernel()) {
         env->mp_state = cpu_is_bsp(env) ? KVM_MP_STATE_RUNNABLE :
                                           KVM_MP_STATE_UNINITIALIZED;

@@ -845,6 +848,13 @@ static int kvm_put_msrs(CPUState *env, int level)
         if (smp_cpus == 1 || env->tsc != 0) {
             kvm_msr_entry_set(&msrs[n++], MSR_IA32_TSC, env->tsc);
         }
+    }
+    /*
+     * The following paravirtual MSRs have side effects on the guest or are
+     * too heavy for normal writeback. Limit them to reset or full state
+     * updates.
+     */
+    if (level >= KVM_PUT_RESET_STATE) {
         kvm_msr_entry_set(&msrs[n++], MSR_KVM_SYSTEM_TIME,
                           env->system_time_msr);
         kvm_msr_entry_set(&msrs[n++], MSR_KVM_WALL_CLOCK, env->wall_clock_msr);

index 664a4a0..ef8f6e6 100644
@@ -866,14 +866,10 @@ static int kvm_put_msrs(CPUState *env, int level)
     if (env->mcg_cap) {
         int i;
 
-        if (level == KVM_PUT_RESET_STATE) {
-            kvm_msr_entry_set(&msrs[n++], MSR_MCG_STATUS, env->mcg_status);
-        } else if (level == KVM_PUT_FULL_STATE) {
-            kvm_msr_entry_set(&msrs[n++], MSR_MCG_STATUS, env->mcg_status);
-            kvm_msr_entry_set(&msrs[n++], MSR_MCG_CTL, env->mcg_ctl);
-            for (i = 0; i < (env->mcg_cap & 0xff) * 4; i++) {
-                kvm_msr_entry_set(&msrs[n++], MSR_MC0_CTL + i, env->mce_banks[i]);
-            }
+        kvm_msr_entry_set(&msrs[n++], MSR_MCG_STATUS, env->mcg_status);
+        kvm_msr_entry_set(&msrs[n++], MSR_MCG_CTL, env->mcg_ctl);
+        for (i = 0; i < (env->mcg_cap & 0xff) * 4; i++) {
+            kvm_msr_entry_set(&msrs[n++], MSR_MC0_CTL + i, env->mce_banks[i]);
         }
     }
 #endif

index eaed43e..ada6629 100644
@@ -131,7 +131,6 @@ typedef struct icount_decr_u16 {
 #endif
 
 struct kvm_run;
-struct KVMState;
 struct qemu_work_item;
 
 typedef struct CPUBreakpoint {

@@ -208,7 +207,6 @@ typedef struct CPUWatchpoint {
     struct QemuCond *halt_cond;                                         \
     struct qemu_work_item *queued_work_first, *queued_work_last;        \
     const char *cpu_model_str;                                          \
-    struct KVMState *kvm_state;                                         \
     struct kvm_run *kvm_run;                                            \
     int kvm_fd;                                                         \
     int kvm_vcpu_dirty;

662 lines not on this page · raw message

index 352c6a6..3a058ad 100644
@@ -53,7 +53,7 @@ int kvm_uncoalesce_mmio_region(target_phys_addr_t start, ram_addr_t size)
     return -ENOSYS;
 }
 
-int kvm_check_extension(KVMState *s, unsigned int extension)
+int kvm_check_extension(unsigned int extension)
 {
     return 0;
 }

index 51ad56f..26ca8c1 100644
@@ -74,12 +74,9 @@ int kvm_irqchip_in_kernel(void);
 
 /* internal API */
 
-struct KVMState;
-typedef struct KVMState KVMState;
+int kvm_ioctl(int type, ...);
 
-int kvm_ioctl(KVMState *s, int type, ...);
-
-int kvm_vm_ioctl(KVMState *s, int type, ...);
+int kvm_vm_ioctl(int type, ...);
 
 int kvm_vcpu_ioctl(CPUState *env, int type, ...);
 

@@ -104,7 +101,7 @@ int kvm_arch_get_registers(CPUState *env);
 
 int kvm_arch_put_registers(CPUState *env, int level);
 
-int kvm_arch_init(KVMState *s, int smp_cpus);
+int kvm_arch_init(int smp_cpus);
 
 int kvm_arch_init_vcpu(CPUState *env);
 

@@ -146,10 +143,8 @@ void kvm_arch_update_guest_debug(CPUState *env, struct kvm_guest_debug *dbg);
 
 bool kvm_arch_stop_on_emulation_error(CPUState *env);
 
-int kvm_check_extension(KVMState *s, unsigned int extension);
+int kvm_check_extension(unsigned int extension);
 
-uint32_t kvm_arch_get_supported_cpuid(CPUState *env, uint32_t function,
-                                      uint32_t index, int reg);
 void kvm_cpu_synchronize_state(CPUState *env);
 void kvm_cpu_synchronize_post_reset(CPUState *env);
 void kvm_cpu_synchronize_post_init(CPUState *env);

@@ -179,7 +174,7 @@ static inline void cpu_synchronize_post_init(CPUState *env)
 
 
 #if !defined(CONFIG_USER_ONLY)
-int kvm_physical_memory_addr_from_ram(KVMState *s, ram_addr_t ram_addr,
+int kvm_physical_memory_addr_from_ram(ram_addr_t ram_addr,
                                       target_phys_addr_t *phys_addr);
 #endif
 

index 5382a28..17ab619 100644
@@ -23,6 +23,7 @@
 
 #include "cpu.h"
 #include "kvm.h"
+#include "kvm_x86.h"
 
 #include "qemu-option.h"
 #include "qemu-config.h"

@@ -1138,10 +1139,10 @@ void cpu_x86_cpuid(CPUX86State *env, uint32_t index, uint32_t count,
             break;
         }
         if (kvm_enabled()) {
-            *eax = kvm_arch_get_supported_cpuid(env, 0xd, count, R_EAX);
-            *ebx = kvm_arch_get_supported_cpuid(env, 0xd, count, R_EBX);
-            *ecx = kvm_arch_get_supported_cpuid(env, 0xd, count, R_ECX);
-            *edx = kvm_arch_get_supported_cpuid(env, 0xd, count, R_EDX);
+            *eax = kvm_x86_get_supported_cpuid(0xd, count, R_EAX);
+            *ebx = kvm_x86_get_supported_cpuid(0xd, count, R_EBX);
+            *ecx = kvm_x86_get_supported_cpuid(0xd, count, R_ECX);
+            *edx = kvm_x86_get_supported_cpuid(0xd, count, R_EDX);
         } else {
             *eax = 0;
             *ebx = 0;

233 lines not on this page · raw message

index 9d7b584..304d0cb 100644
@@ -22,4 +22,7 @@ void kvm_inject_x86_mce(CPUState *cenv, int bank, uint64_t status,
                         uint64_t mcg_status, uint64_t addr, uint64_t misc,
                         int flag);
 
+uint32_t kvm_x86_get_supported_cpuid(uint32_t function, uint32_t index,
+                                     int reg);
+
 #endif

index 849b404..56d30cc 100644
@@ -56,13 +56,13 @@ static void kvm_kick_env(void *env)
     qemu_cpu_kick(env);
 }
 
-int kvm_arch_init(KVMState *s, int smp_cpus)
+int kvm_arch_init(int smp_cpus)
 {
 #ifdef KVM_CAP_PPC_UNSET_IRQ
-    cap_interrupt_unset = kvm_check_extension(s, KVM_CAP_PPC_UNSET_IRQ);
+    cap_interrupt_unset = kvm_check_extension(KVM_CAP_PPC_UNSET_IRQ);
 #endif
 #ifdef KVM_CAP_PPC_IRQ_LEVEL
-    cap_interrupt_level = kvm_check_extension(s, KVM_CAP_PPC_IRQ_LEVEL);
+    cap_interrupt_level = kvm_check_extension(KVM_CAP_PPC_IRQ_LEVEL);
 #endif
 
     if (!cap_interrupt_level) {

@@ -164,7 +164,7 @@ int kvm_arch_get_registers(CPUState *env)
         env->gpr[i] = regs.gpr[i];
 
 #ifdef KVM_CAP_PPC_SEGSTATE
-    if (kvm_check_extension(env->kvm_state, KVM_CAP_PPC_SEGSTATE)) {
+    if (kvm_check_extension(KVM_CAP_PPC_SEGSTATE)) {
         env->sdr1 = sregs.u.s.sdr1;
 
         /* Sync SLB */

@@ -371,8 +371,8 @@ int kvmppc_get_hypercall(CPUState *env, uint8_t *buf, int buf_len)
 #ifdef KVM_CAP_PPC_GET_PVINFO
     struct kvm_ppc_pvinfo pvinfo;
 
-    if (kvm_check_extension(env->kvm_state, KVM_CAP_PPC_GET_PVINFO) &&
-        !kvm_vm_ioctl(env->kvm_state, KVM_PPC_GET_PVINFO, &pvinfo)) {
+    if (kvm_check_extension(KVM_CAP_PPC_GET_PVINFO) &&
+        !kvm_vm_ioctl(KVM_PPC_GET_PVINFO, &pvinfo)) {
         memcpy(buf, pvinfo.hcall, buf_len);
 
         return 0;

index adf4a9e..927a37e 100644
@@ -70,7 +70,7 @@
 #define SCLP_CMDW_READ_SCP_INFO         0x00020001
 #define SCLP_CMDW_READ_SCP_INFO_FORCED  0x00120001
 
-int kvm_arch_init(KVMState *s, int smp_cpus)
+int kvm_arch_init(int smp_cpus)
 {
     return 0;
 }

@@ -186,10 +186,6 @@ static void kvm_s390_interrupt_internal(CPUState *env, int type, uint32_t parm,
     struct kvm_s390_interrupt kvmint;
     int r;
 
-    if (!env->kvm_state) {
-        return;
-    }
-
     env->halted = 0;
     env->exception_index = -1;
 

@@ -198,7 +194,7 @@ static void kvm_s390_interrupt_internal(CPUState *env, int type, uint32_t parm,
     kvmint.parm64 = parm64;
 
     if (vm) {
-        r = kvm_vm_ioctl(env->kvm_state, KVM_S390_INTERRUPT, &kvmint);
+        r = kvm_vm_ioctl(KVM_S390_INTERRUPT, &kvmint);
     } else {
         r = kvm_vcpu_ioctl(env, KVM_S390_INTERRUPT, &kvmint);
     }

index 26f459c..c4b6813 100644
@@ -29,6 +29,7 @@
 #include "hw/apic.h"
 #include "ioport.h"
 #include "kvm_x86.h"
+#include "hw/sysbus.h"
 
 #ifdef CONFIG_KVM_PARA
 #include <linux/kvm_para.h>

@@ -309,6 +310,64 @@ void kvm_inject_x86_mce(CPUState *cenv, int bank, uint64_t status,
 #endif
 }
 
+#ifdef KVM_CAP_ADJUST_CLOCK
+typedef struct KVMClockState {
+    SysBusDevice busdev;
+    uint64_t clock;
+    struct kvm_clock_data data;
+} KVMClockState;
+
+static void kvmclock_pre_save(void *opaque)
+{
+    KVMClockState *s = opaque;
+    struct kvm_clock_data data;
+    int ret;
+
+    ret = kvm_vm_ioctl(KVM_GET_CLOCK, &data);
+    if (ret < 0) {
+        fprintf(stderr, "KVM_GET_CLOCK failed: %s\n", strerror(ret));
+        data.clock = 0;
+    }
+    s->clock = data.clock;
+}
+
+static int kvmclock_post_load(void *opaque, int version_id)
+{
+    KVMClockState *s = opaque;
+    struct kvm_clock_data data;
+
+    data.clock = s->clock;
+    data.flags = 0;
+    return kvm_vm_ioctl(KVM_SET_CLOCK, &data);
+}
+
+static int kvmclock_init(SysBusDevice *dev)
+{
+    return 0;
+}
+
+static const VMStateDescription kvmclock_vmsd= {
+    .name = "kvmclock",
+    .version_id = 1,
+    .minimum_version_id = 1,
+    .minimum_version_id_old = 1,
+    .pre_save = kvmclock_pre_save,
+    .post_load = kvmclock_post_load,
+    .fields = (VMStateField []) {
+        VMSTATE_UINT64(clock, KVMClockState),
+        VMSTATE_END_OF_LIST()
+    }
+};
+
+static SysBusDeviceInfo kvmclock_info = {
+    .qdev.name = "kvmclock",
+    .qdev.size = sizeof(KVMClockState),
+    .qdev.vmsd = &kvmclock_vmsd,
+    .qdev.no_user = 1,
+    .init = kvmclock_init,
+};
+#endif /* KVM_CAP_ADJUST_CLOCK */
+
 int kvm_arch_init_vcpu(CPUState *env)
 {
     struct {

@@ -335,7 +394,6 @@ int kvm_arch_init_vcpu(CPUState *env)
     env->cpuid_svm_features  &= kvm_x86_get_supported_cpuid(0x8000000A,
                                                             0, R_EDX);
 
-
     cpuid_i = 0;
 
 #ifdef CONFIG_KVM_PARA

@@ -442,6 +500,13 @@ int kvm_arch_init_vcpu(CPUState *env)
     }
 #endif
 
+#ifdef KVM_CAP_ADJUST_CLOCK
+    if (cpu_is_bsp(env) &&
+        (env->cpuid_kvm_features & (1ULL << KVM_FEATURE_CLOCKSOURCE))) {
+        sysbus_create_simple("kvmclock", -1, NULL);
+    }
+#endif
+
     return kvm_vcpu_ioctl(env, KVM_SET_CPUID2, &cpuid_data);
 }
 

@@ -534,6 +599,10 @@ int kvm_arch_init(int smp_cpus)
     int ret;
     struct utsname utsname;
 
+#ifdef KVM_CAP_ADJUST_CLOCK
+    sysbus_register_withprop(&kvmclock_info);
+#endif
+
     ret = kvm_get_supported_msrs();
     if (ret < 0) {
         return ret;

index d8820c7..190fcdf 100644
@@ -584,7 +584,7 @@ static CPUPhysMemoryClient kvm_cpu_phys_memory_client = {
     .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"

@@ -687,7 +687,7 @@ int kvm_init(int smp_cpus)
     kvm_state.xcrs = kvm_check_extension(KVM_CAP_XCRS);
 #endif
 
-    ret = kvm_arch_init(smp_cpus);
+    ret = kvm_arch_init();
     if (ret < 0) {
         goto err;
     }

index 3a058ad..e00d7df 100644
@@ -58,7 +58,7 @@ int kvm_check_extension(unsigned int extension)
     return 0;
 }
 
-int kvm_init(int smp_cpus)
+int kvm_init(void)
 {
     return -ENOSYS;
 }

index 26ca8c1..31d9f21 100644
@@ -34,7 +34,7 @@ struct kvm_run;
 
 /* external API */
 
-int kvm_init(int smp_cpus);
+int kvm_init(void);
 
 int kvm_has_sync_mmu(void);
 int kvm_has_vcpu_events(void);

@@ -101,7 +101,7 @@ int kvm_arch_get_registers(CPUState *env);
 
 int kvm_arch_put_registers(CPUState *env, int level);
 
-int kvm_arch_init(int smp_cpus);
+int kvm_arch_init(void);
 
 int kvm_arch_init_vcpu(CPUState *env);
 

index c4b6813..6d31dde 100644
@@ -594,7 +594,7 @@ static int kvm_init_identity_map_page(void)
     return 0;
 }
 
-int kvm_arch_init(int smp_cpus)
+int kvm_arch_init(void)
 {
     int ret;
     struct utsname utsname;

index 56d30cc..72f2f94 100644
@@ -56,7 +56,7 @@ static void kvm_kick_env(void *env)
     qemu_cpu_kick(env);
 }
 
-int kvm_arch_init(int smp_cpus)
+int kvm_arch_init(void)
 {
 #ifdef KVM_CAP_PPC_UNSET_IRQ
     cap_interrupt_unset = kvm_check_extension(KVM_CAP_PPC_UNSET_IRQ);

index 927a37e..4f9075c 100644
@@ -70,7 +70,7 @@
 #define SCLP_CMDW_READ_SCP_INFO         0x00020001
 #define SCLP_CMDW_READ_SCP_INFO_FORCED  0x00120001
 
-int kvm_arch_init(int smp_cpus)
+int kvm_arch_init(void)
 {
     return 0;
 }

index 768dbf4..abe4af8 100644
@@ -2834,7 +2834,7 @@ int main(int argc, char **argv, char **envp)
     }
 
     if (kvm_allowed) {
-        int ret = kvm_init(smp_cpus);
+        int ret = kvm_init();
         if (ret < 0) {
             if (!kvm_available()) {
                 printf("KVM not supported for this target\n");

index 6d31dde..caca407 100644
@@ -575,23 +575,12 @@ static int kvm_get_supported_msrs(void)
     return ret;
 }
 
-static int kvm_init_identity_map_page(void)
+static bool host_supports_vmx(void)
 {
-#ifdef KVM_CAP_SET_IDENTITY_MAP_ADDR
-    int ret;
-    uint64_t addr = 0xfffbc000;
-
-    if (!kvm_check_extension(KVM_CAP_SET_IDENTITY_MAP_ADDR)) {
-        return 0;
-    }
+    uint32_t ecx, unused;
 
-    ret = kvm_vm_ioctl(KVM_SET_IDENTITY_MAP_ADDR, &addr);
-    if (ret < 0) {
-        fprintf(stderr, "kvm_set_identity_map_addr: %s\n", strerror(ret));
-        return ret;
-    }
-#endif
-    return 0;
+    host_cpuid(1, 0, &unused, &unused, &ecx, &unused);
+    return ecx & CPUID_EXT_VMX;
 }
 
 int kvm_arch_init(void)

@@ -611,35 +600,47 @@ int kvm_arch_init(void)
     uname(&utsname);
     lm_capable_kernel = strcmp(utsname.machine, "x86_64") == 0;
 
-    /* create vm86 tss.  KVM uses vm86 mode to emulate 16-bit code
-     * directly.  In order to use vm86 mode, a TSS is needed.  Since this
-     * must be part of guest physical memory, we need to allocate it.  Older
-     * versions of KVM just assumed that it would be at the end of physical
-     * memory but that doesn't work with more than 4GB of memory.  We simply
-     * refuse to work with those older versions of KVM. */
-    ret = kvm_check_extension(KVM_CAP_SET_TSS_ADDR);
-    if (ret <= 0) {
-        fprintf(stderr, "kvm does not support KVM_CAP_SET_TSS_ADDR\n");
-        return ret;
-    }
+    if (host_supports_vmx()) {
+        /*
+         * On older Intel CPUs, KVM uses vm86 mode to emulate 16-bit code
+         * directly. In order to use vm86 mode, an EPT identity map and a TSS
+         * are needed. Since these must be part of guest physical memory, we
+         * need to allocate them, both by setting their start addresses in the
+         * kernel and by creating a corresponding e820 entry. We need 4 pages
+         * before the BIOS.
+         *
+         * Older KVM versions may not support setting the identity map base.
+         * In that case we need to stick with the default, i.e. a 256K maximum
+         * BIOS size.
+         */
+        uint64_t identity_base = 0xfffbc000;
 
-    /* this address is 3 pages before the bios, and the bios should present
-     * as unavaible memory.  FIXME, need to ensure the e820 map deals with
-     * this?
-     */
-    /*
-     * Tell fw_cfg to notify the BIOS to reserve the range.
-     */
-    if (e820_add_entry(0xfffbc000, 0x4000, E820_RESERVED) < 0) {
-        perror("e820_add_entry() table is full");
-        exit(1);
-    }
-    ret = kvm_vm_ioctl(KVM_SET_TSS_ADDR, 0xfffbd000);
-    if (ret < 0) {
-        return ret;
+#ifdef KVM_CAP_SET_IDENTITY_MAP_ADDR
+        if (kvm_check_extension(KVM_CAP_SET_IDENTITY_MAP_ADDR)) {
+            /* Allows up to 16M BIOSes. */
+            identity_base = 0xfeffc000;
+
+            ret = kvm_vm_ioctl(KVM_SET_IDENTITY_MAP_ADDR, &identity_base);
+            if (ret < 0) {
+                return ret;
+            }
+        }
+#endif
+        /* Set TSS base one page after EPT identity map. */
+        ret = kvm_vm_ioctl(KVM_SET_TSS_ADDR, identity_base + 0x1000);
+        if (ret < 0) {
+            return ret;
+        }
+
+        /* Tell fw_cfg to notify the BIOS to reserve the range. */
+        ret = e820_add_entry(identity_base, 0x4000, E820_RESERVED);
+        if (ret < 0) {
+            fprintf(stderr, "e820_add_entry() table is full\n");
+            return ret;
+        }
     }
 
-    return kvm_init_identity_map_page();
+    return 0;
 }
 
 static void set_v8086_seg(struct kvm_segment *lhs, const SegmentCache *rhs)

@@ -1592,14 +1593,6 @@ static int kvm_handle_halt(CPUState *env)
     return 1;
 }
 
-static bool host_supports_vmx(void)
-{
-    uint32_t ecx, unused;
-
-    host_cpuid(1, 0, &unused, &unused, &ecx, &unused);
-    return ecx & CPUID_EXT_VMX;
-}
-
 #define VMX_INVALID_GUEST_STATE 0x80000021
 
 int kvm_arch_handle_exit(CPUState *env, struct kvm_run *run)

index 190fcdf..15d5f32 100644
@@ -57,9 +57,7 @@ static 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;

@@ -214,12 +212,10 @@ int kvm_init_vcpu(CPUState *env)
         goto err;
     }
 
-#ifdef KVM_CAP_COALESCED_MMIO
     if (kvm_state.coalesced_mmio && !kvm_state.coalesced_mmio_ring) {
         kvm_state.coalesced_mmio_ring =
             (void *)env->kvm_run + kvm_state.coalesced_mmio * PAGE_SIZE;
     }
-#endif
 
     ret = kvm_arch_init_vcpu(env);
     if (ret == 0) {

@@ -386,7 +382,6 @@ int kvm_coalesce_mmio_region(target_phys_addr_t start, ram_addr_t size)
 {
     int ret = -ENOSYS;
 
-#ifdef KVM_CAP_COALESCED_MMIO
     if (kvm_state.coalesced_mmio) {
         struct kvm_coalesced_mmio_zone zone;
 

@@ -395,7 +390,6 @@ int kvm_coalesce_mmio_region(target_phys_addr_t start, ram_addr_t size)
 
         ret = kvm_vm_ioctl(KVM_REGISTER_COALESCED_MMIO, &zone);
     }
-#endif
 
     return ret;
 }

@@ -404,7 +398,6 @@ int kvm_uncoalesce_mmio_region(target_phys_addr_t start, ram_addr_t size)
 {
     int ret = -ENOSYS;
 
-#ifdef KVM_CAP_COALESCED_MMIO
     if (kvm_state.coalesced_mmio) {
         struct kvm_coalesced_mmio_zone zone;
 

@@ -413,7 +406,6 @@ int kvm_uncoalesce_mmio_region(target_phys_addr_t start, ram_addr_t size)
 
         ret = kvm_vm_ioctl(KVM_UNREGISTER_COALESCED_MMIO, &zone);
     }
-#endif
 
     return ret;
 }

@@ -654,9 +646,7 @@ int kvm_init(void)
         goto err;
     }
 
-#ifdef KVM_CAP_COALESCED_MMIO
     kvm_state.coalesced_mmio = kvm_check_extension(KVM_CAP_COALESCED_MMIO);
-#endif
 
     kvm_state.broken_set_mem_region = 1;
 #ifdef KVM_CAP_JOIN_MEMORY_REGIONS_WORKS

@@ -777,7 +767,6 @@ static int kvm_handle_internal_error(CPUState *env, struct kvm_run *run)
 
 void kvm_flush_coalesced_mmio_buffer(void)
 {
-#ifdef KVM_CAP_COALESCED_MMIO
     if (kvm_state.coalesced_mmio_ring) {
         struct kvm_coalesced_mmio_ring *ring = kvm_state.coalesced_mmio_ring;
         while (ring->first != ring->last) {

@@ -790,7 +779,6 @@ 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)

@@ -988,11 +976,7 @@ int kvm_vcpu_ioctl(CPUState *env, int type, ...)
 
 int kvm_has_sync_mmu(void)
 {
-#ifdef KVM_CAP_SYNC_MMU
     return kvm_check_extension(KVM_CAP_SYNC_MMU);
-#else
-    return 0;
-#endif
 }
 
 int kvm_has_vcpu_events(void)

index caca407..b4a3463 100644
@@ -59,8 +59,6 @@ static bool has_msr_star;
 static bool has_msr_hsave_pa;
 static int lm_capable_kernel;
 
-#ifdef KVM_CAP_EXT_CPUID
-
 static struct kvm_cpuid2 *try_get_cpuid(int max)
 {
     struct kvm_cpuid2 *cpuid;

@@ -94,10 +92,6 @@ uint32_t kvm_x86_get_supported_cpuid(uint32_t function, uint32_t index,
     uint32_t ret = 0;
     uint32_t cpuid_1_edx;
 
-    if (!kvm_check_extension(KVM_CAP_EXT_CPUID)) {
-        return -1U;
-    }
-
     max = 1;
     while ((cpuid = try_get_cpuid(max)) == NULL) {
         max *= 2;

@@ -141,30 +135,14 @@ uint32_t kvm_x86_get_supported_cpuid(uint32_t function, uint32_t index,
     return ret;
 }
 
-#else
-
-uint32_t kvm_x86_get_supported_cpuid(uint32_t function, uint32_t index,
-                                     int reg)
-{
-    return -1U;
-}
-
-#endif
-
 #ifdef CONFIG_KVM_PARA
 struct kvm_para_features {
     int cap;
     int feature;
 } para_features[] = {
-#ifdef KVM_CAP_CLOCKSOURCE
     { KVM_CAP_CLOCKSOURCE, KVM_FEATURE_CLOCKSOURCE },
-#endif
-#ifdef KVM_CAP_NOP_IO_DELAY
     { KVM_CAP_NOP_IO_DELAY, KVM_FEATURE_NOP_IO_DELAY },
-#endif
-#ifdef KVM_CAP_PV_MMU
     { KVM_CAP_PV_MMU, KVM_FEATURE_MMU_OP },
-#endif
 #ifdef KVM_CAP_ASYNC_PF
     { KVM_CAP_ASYNC_PF, KVM_FEATURE_ASYNC_PF },
 #endif

index 15d5f32..766a3a7 100644
@@ -844,6 +844,8 @@ void 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");

@@ -856,8 +858,6 @@ void kvm_cpu_exec(CPUState *env)
             abort();
         }
 
-        kvm_flush_coalesced_mmio_buffer();
-
         ret = 0; /* exit loop */
         switch (run->exit_reason) {
         case KVM_EXIT_IO: