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Diffstat (limited to 'target-i386/cpu.c')
-rw-r--r--target-i386/cpu.c98
1 files changed, 73 insertions, 25 deletions
diff --git a/target-i386/cpu.c b/target-i386/cpu.c
index 156e919..c46286a 100644
--- a/target-i386/cpu.c
+++ b/target-i386/cpu.c
@@ -95,10 +95,14 @@ static const char *ext3_feature_name[] = {
};
static const char *kvm_feature_name[] = {
- "kvmclock", "kvm_nopiodelay", "kvm_mmu", "kvmclock", "kvm_asyncpf", NULL, "kvm_pv_eoi", NULL,
- NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
- NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
- NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
+ "kvmclock", "kvm_nopiodelay", "kvm_mmu", "kvmclock",
+ "kvm_asyncpf", "kvm_steal_time", "kvm_pv_eoi", NULL,
+ NULL, NULL, NULL, NULL,
+ NULL, NULL, NULL, NULL,
+ NULL, NULL, NULL, NULL,
+ NULL, NULL, NULL, NULL,
+ NULL, NULL, NULL, NULL,
+ NULL, NULL, NULL, NULL,
};
static const char *svm_feature_name[] = {
@@ -113,8 +117,8 @@ static const char *svm_feature_name[] = {
};
static const char *cpuid_7_0_ebx_feature_name[] = {
- NULL, NULL, NULL, NULL, NULL, NULL, NULL, "smep",
- NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
+ "fsgsbase", NULL, NULL, "bmi1", "hle", "avx2", NULL, "smep",
+ "bmi2", "erms", "invpcid", "rtm", NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL, "smap", NULL, NULL, NULL,
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
};
@@ -769,13 +773,20 @@ static int cpu_x86_fill_model_id(char *str)
return 0;
}
-static int cpu_x86_fill_host(x86_def_t *x86_cpu_def)
+/* Fill a x86_def_t struct with information about the host CPU, and
+ * the CPU features supported by the host hardware + host kernel
+ *
+ * This function may be called only if KVM is enabled.
+ */
+static void kvm_cpu_fill_host(x86_def_t *x86_cpu_def)
{
+ KVMState *s = kvm_state;
uint32_t eax = 0, ebx = 0, ecx = 0, edx = 0;
+ assert(kvm_enabled());
+
x86_cpu_def->name = "host";
host_cpuid(0x0, 0, &eax, &ebx, &ecx, &edx);
- x86_cpu_def->level = eax;
x86_cpu_def->vendor1 = ebx;
x86_cpu_def->vendor2 = edx;
x86_cpu_def->vendor3 = ecx;
@@ -784,21 +795,24 @@ static int cpu_x86_fill_host(x86_def_t *x86_cpu_def)
x86_cpu_def->family = ((eax >> 8) & 0x0F) + ((eax >> 20) & 0xFF);
x86_cpu_def->model = ((eax >> 4) & 0x0F) | ((eax & 0xF0000) >> 12);
x86_cpu_def->stepping = eax & 0x0F;
- x86_cpu_def->ext_features = ecx;
- x86_cpu_def->features = edx;
- if (kvm_enabled() && x86_cpu_def->level >= 7) {
- x86_cpu_def->cpuid_7_0_ebx_features = kvm_arch_get_supported_cpuid(kvm_state, 0x7, 0, R_EBX);
+ x86_cpu_def->level = kvm_arch_get_supported_cpuid(s, 0x0, 0, R_EAX);
+ x86_cpu_def->features = kvm_arch_get_supported_cpuid(s, 0x1, 0, R_EDX);
+ x86_cpu_def->ext_features = kvm_arch_get_supported_cpuid(s, 0x1, 0, R_ECX);
+
+ if (x86_cpu_def->level >= 7) {
+ x86_cpu_def->cpuid_7_0_ebx_features =
+ kvm_arch_get_supported_cpuid(s, 0x7, 0, R_EBX);
} else {
x86_cpu_def->cpuid_7_0_ebx_features = 0;
}
- host_cpuid(0x80000000, 0, &eax, &ebx, &ecx, &edx);
- x86_cpu_def->xlevel = eax;
+ x86_cpu_def->xlevel = kvm_arch_get_supported_cpuid(s, 0x80000000, 0, R_EAX);
+ x86_cpu_def->ext2_features =
+ kvm_arch_get_supported_cpuid(s, 0x80000001, 0, R_EDX);
+ x86_cpu_def->ext3_features =
+ kvm_arch_get_supported_cpuid(s, 0x80000001, 0, R_ECX);
- host_cpuid(0x80000001, 0, &eax, &ebx, &ecx, &edx);
- x86_cpu_def->ext2_features = edx;
- x86_cpu_def->ext3_features = ecx;
cpu_x86_fill_model_id(x86_cpu_def->model_id);
x86_cpu_def->vendor_override = 0;
@@ -807,11 +821,13 @@ static int cpu_x86_fill_host(x86_def_t *x86_cpu_def)
x86_cpu_def->vendor2 == CPUID_VENDOR_VIA_2 &&
x86_cpu_def->vendor3 == CPUID_VENDOR_VIA_3) {
host_cpuid(0xC0000000, 0, &eax, &ebx, &ecx, &edx);
+ eax = kvm_arch_get_supported_cpuid(s, 0xC0000000, 0, R_EAX);
if (eax >= 0xC0000001) {
/* Support VIA max extended level */
x86_cpu_def->xlevel2 = eax;
host_cpuid(0xC0000001, 0, &eax, &ebx, &ecx, &edx);
- x86_cpu_def->ext4_features = edx;
+ x86_cpu_def->ext4_features =
+ kvm_arch_get_supported_cpuid(s, 0xC0000001, 0, R_EDX);
}
}
@@ -822,8 +838,6 @@ static int cpu_x86_fill_host(x86_def_t *x86_cpu_def)
* unsupported ones later.
*/
x86_cpu_def->svm_features = -1;
-
- return 0;
}
static int unavailable_host_feature(struct model_features_t *f, uint32_t mask)
@@ -844,8 +858,10 @@ static int unavailable_host_feature(struct model_features_t *f, uint32_t mask)
/* best effort attempt to inform user requested cpu flags aren't making
* their way to the guest. Note: ft[].check_feat ideally should be
* specified via a guest_def field to suppress report of extraneous flags.
+ *
+ * This function may be called only if KVM is enabled.
*/
-static int check_features_against_host(x86_def_t *guest_def)
+static int kvm_check_features_against_host(x86_def_t *guest_def)
{
x86_def_t host_def;
uint32_t mask;
@@ -860,7 +876,9 @@ static int check_features_against_host(x86_def_t *guest_def)
{&guest_def->ext3_features, &host_def.ext3_features,
~CPUID_EXT3_SVM, ext3_feature_name, 0x80000001}};
- cpu_x86_fill_host(&host_def);
+ assert(kvm_enabled());
+
+ kvm_cpu_fill_host(&host_def);
for (rv = 0, i = 0; i < ARRAY_SIZE(ft); ++i)
for (mask = 1; mask; mask <<= 1)
if (ft[i].check_feat & mask && *ft[i].guest_feat & mask &&
@@ -1147,7 +1165,7 @@ static int cpu_x86_find_by_name(x86_def_t *x86_cpu_def, const char *cpu_model)
if (name && !strcmp(name, def->name))
break;
if (kvm_enabled() && name && strcmp(name, "host") == 0) {
- cpu_x86_fill_host(x86_cpu_def);
+ kvm_cpu_fill_host(x86_cpu_def);
} else if (!def) {
goto error;
} else {
@@ -1285,8 +1303,8 @@ static int cpu_x86_find_by_name(x86_def_t *x86_cpu_def, const char *cpu_model)
x86_cpu_def->kvm_features &= ~minus_kvm_features;
x86_cpu_def->svm_features &= ~minus_svm_features;
x86_cpu_def->cpuid_7_0_ebx_features &= ~minus_7_0_ebx_features;
- if (check_cpuid) {
- if (check_features_against_host(x86_cpu_def) && enforce_cpuid)
+ if (check_cpuid && kvm_enabled()) {
+ if (kvm_check_features_against_host(x86_cpu_def) && enforce_cpuid)
goto error;
}
if (x86_cpu_def->cpuid_7_0_ebx_features && x86_cpu_def->level < 7) {
@@ -1375,6 +1393,32 @@ CpuDefinitionInfoList *arch_query_cpu_definitions(Error **errp)
return cpu_list;
}
+#ifdef CONFIG_KVM
+static void filter_features_for_kvm(X86CPU *cpu)
+{
+ CPUX86State *env = &cpu->env;
+ KVMState *s = kvm_state;
+
+ env->cpuid_features &=
+ kvm_arch_get_supported_cpuid(s, 1, 0, R_EDX);
+ env->cpuid_ext_features &=
+ kvm_arch_get_supported_cpuid(s, 1, 0, R_ECX);
+ env->cpuid_ext2_features &=
+ kvm_arch_get_supported_cpuid(s, 0x80000001, 0, R_EDX);
+ env->cpuid_ext3_features &=
+ kvm_arch_get_supported_cpuid(s, 0x80000001, 0, R_ECX);
+ env->cpuid_svm_features &=
+ kvm_arch_get_supported_cpuid(s, 0x8000000A, 0, R_EDX);
+ env->cpuid_7_0_ebx_features &=
+ kvm_arch_get_supported_cpuid(s, 7, 0, R_EBX);
+ env->cpuid_kvm_features &=
+ kvm_arch_get_supported_cpuid(s, KVM_CPUID_FEATURES, 0, R_EAX);
+ env->cpuid_ext4_features &=
+ kvm_arch_get_supported_cpuid(s, 0xC0000001, 0, R_EDX);
+
+}
+#endif
+
int cpu_x86_register(X86CPU *cpu, const char *cpu_model)
{
CPUX86State *env = &cpu->env;
@@ -1432,6 +1476,10 @@ int cpu_x86_register(X86CPU *cpu, const char *cpu_model)
);
env->cpuid_ext3_features &= TCG_EXT3_FEATURES;
env->cpuid_svm_features &= TCG_SVM_FEATURES;
+ } else {
+#ifdef CONFIG_KVM
+ filter_features_for_kvm(cpu);
+#endif
}
object_property_set_str(OBJECT(cpu), def->model_id, "model-id", &error);
if (error) {
generated by cgit v1.1 at 2024-12-23 19:07:25 +0000