aboutsummaryrefslogtreecommitdiff
path: root/target-i386/cpuid.c
diff options
context:
space:
mode:
Diffstat (limited to 'target-i386/cpuid.c')
-rw-r--r--target-i386/cpuid.c77
1 files changed, 60 insertions, 17 deletions
diff --git a/target-i386/cpuid.c b/target-i386/cpuid.c
index 3fcf78f093..0e0bf60f4c 100644
--- a/target-i386/cpuid.c
+++ b/target-i386/cpuid.c
@@ -79,6 +79,17 @@ static const char *kvm_feature_name[] = {
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
};
+static const char *svm_feature_name[] = {
+ "npt", "lbrv", "svm_lock", "nrip_save",
+ "tsc_scale", "vmcb_clean", "flushbyasid", "decodeassists",
+ NULL, NULL, "pause_filter", NULL,
+ "pfthreshold", NULL, NULL, NULL,
+ NULL, NULL, NULL, NULL,
+ NULL, NULL, NULL, NULL,
+ NULL, NULL, NULL, NULL,
+ NULL, NULL, NULL, NULL,
+};
+
/* collects per-function cpuid data
*/
typedef struct model_features_t {
@@ -192,13 +203,15 @@ static void add_flagname_to_bitmaps(const char *flagname, uint32_t *features,
uint32_t *ext_features,
uint32_t *ext2_features,
uint32_t *ext3_features,
- uint32_t *kvm_features)
+ uint32_t *kvm_features,
+ uint32_t *svm_features)
{
if (!lookup_feature(features, flagname, NULL, feature_name) &&
!lookup_feature(ext_features, flagname, NULL, ext_feature_name) &&
!lookup_feature(ext2_features, flagname, NULL, ext2_feature_name) &&
!lookup_feature(ext3_features, flagname, NULL, ext3_feature_name) &&
- !lookup_feature(kvm_features, flagname, NULL, kvm_feature_name))
+ !lookup_feature(kvm_features, flagname, NULL, kvm_feature_name) &&
+ !lookup_feature(svm_features, flagname, NULL, svm_feature_name))
fprintf(stderr, "CPU feature %s not found\n", flagname);
}
@@ -210,7 +223,8 @@ typedef struct x86_def_t {
int family;
int model;
int stepping;
- uint32_t features, ext_features, ext2_features, ext3_features, kvm_features;
+ uint32_t features, ext_features, ext2_features, ext3_features;
+ uint32_t kvm_features, svm_features;
uint32_t xlevel;
char model_id[48];
int vendor_override;
@@ -253,6 +267,7 @@ typedef struct x86_def_t {
CPUID_EXT2_PDPE1GB */
#define TCG_EXT3_FEATURES (CPUID_EXT3_LAHF_LM | CPUID_EXT3_SVM | \
CPUID_EXT3_CR8LEG | CPUID_EXT3_ABM | CPUID_EXT3_SSE4A)
+#define TCG_SVM_FEATURES 0
/* maintains list of cpu model definitions
*/
@@ -305,6 +320,7 @@ static x86_def_t builtin_x86_defs[] = {
CPUID_EXT3_OSVW, CPUID_EXT3_IBS */
.ext3_features = CPUID_EXT3_LAHF_LM | CPUID_EXT3_SVM |
CPUID_EXT3_ABM | CPUID_EXT3_SSE4A,
+ .svm_features = CPUID_SVM_NPT | CPUID_SVM_LBRV,
.xlevel = 0x8000001A,
.model_id = "AMD Phenom(tm) 9550 Quad-Core Processor"
},
@@ -505,6 +521,15 @@ static int cpu_x86_fill_host(x86_def_t *x86_cpu_def)
cpu_x86_fill_model_id(x86_cpu_def->model_id);
x86_cpu_def->vendor_override = 0;
+
+ /*
+ * Every SVM feature requires emulation support in KVM - so we can't just
+ * read the host features here. KVM might even support SVM features not
+ * available on the host hardware. Just set all bits and mask out the
+ * unsupported ones later.
+ */
+ x86_cpu_def->svm_features = -1;
+
return 0;
}
@@ -560,8 +585,14 @@ static int cpu_x86_find_by_name(x86_def_t *x86_cpu_def, const char *cpu_model)
char *s = strdup(cpu_model);
char *featurestr, *name = strtok(s, ",");
- uint32_t plus_features = 0, plus_ext_features = 0, plus_ext2_features = 0, plus_ext3_features = 0, plus_kvm_features = 0;
- uint32_t minus_features = 0, minus_ext_features = 0, minus_ext2_features = 0, minus_ext3_features = 0, minus_kvm_features = 0;
+ /* Features to be added*/
+ uint32_t plus_features = 0, plus_ext_features = 0;
+ uint32_t plus_ext2_features = 0, plus_ext3_features = 0;
+ uint32_t plus_kvm_features = 0, plus_svm_features = 0;
+ /* Features to be removed */
+ uint32_t minus_features = 0, minus_ext_features = 0;
+ uint32_t minus_ext2_features = 0, minus_ext3_features = 0;
+ uint32_t minus_kvm_features = 0, minus_svm_features = 0;
uint32_t numvalue;
for (def = x86_defs; def; def = def->next)
@@ -579,16 +610,22 @@ static int cpu_x86_find_by_name(x86_def_t *x86_cpu_def, const char *cpu_model)
add_flagname_to_bitmaps("hypervisor", &plus_features,
&plus_ext_features, &plus_ext2_features, &plus_ext3_features,
- &plus_kvm_features);
+ &plus_kvm_features, &plus_svm_features);
featurestr = strtok(NULL, ",");
while (featurestr) {
char *val;
if (featurestr[0] == '+') {
- add_flagname_to_bitmaps(featurestr + 1, &plus_features, &plus_ext_features, &plus_ext2_features, &plus_ext3_features, &plus_kvm_features);
+ add_flagname_to_bitmaps(featurestr + 1, &plus_features,
+ &plus_ext_features, &plus_ext2_features,
+ &plus_ext3_features, &plus_kvm_features,
+ &plus_svm_features);
} else if (featurestr[0] == '-') {
- add_flagname_to_bitmaps(featurestr + 1, &minus_features, &minus_ext_features, &minus_ext2_features, &minus_ext3_features, &minus_kvm_features);
+ add_flagname_to_bitmaps(featurestr + 1, &minus_features,
+ &minus_ext_features, &minus_ext2_features,
+ &minus_ext3_features, &minus_kvm_features,
+ &minus_svm_features);
} else if ((val = strchr(featurestr, '='))) {
*val = 0; val++;
if (!strcmp(featurestr, "family")) {
@@ -670,11 +707,13 @@ static int cpu_x86_find_by_name(x86_def_t *x86_cpu_def, const char *cpu_model)
x86_cpu_def->ext2_features |= plus_ext2_features;
x86_cpu_def->ext3_features |= plus_ext3_features;
x86_cpu_def->kvm_features |= plus_kvm_features;
+ x86_cpu_def->svm_features |= plus_svm_features;
x86_cpu_def->features &= ~minus_features;
x86_cpu_def->ext_features &= ~minus_ext_features;
x86_cpu_def->ext2_features &= ~minus_ext2_features;
x86_cpu_def->ext3_features &= ~minus_ext3_features;
x86_cpu_def->kvm_features &= ~minus_kvm_features;
+ x86_cpu_def->svm_features &= ~minus_svm_features;
if (check_cpuid) {
if (check_features_against_host(x86_cpu_def) && enforce_cpuid)
goto error;
@@ -816,6 +855,7 @@ int cpu_x86_register (CPUX86State *env, const char *cpu_model)
env->cpuid_ext3_features = def->ext3_features;
env->cpuid_xlevel = def->xlevel;
env->cpuid_kvm_features = def->kvm_features;
+ env->cpuid_svm_features = def->svm_features;
if (!kvm_enabled()) {
env->cpuid_features &= TCG_FEATURES;
env->cpuid_ext_features &= TCG_EXT_FEATURES;
@@ -825,6 +865,7 @@ int cpu_x86_register (CPUX86State *env, const char *cpu_model)
#endif
);
env->cpuid_ext3_features &= TCG_EXT3_FEATURES;
+ env->cpuid_svm_features &= TCG_SVM_FEATURES;
}
{
const char *model_id = def->model_id;
@@ -1135,11 +1176,6 @@ void cpu_x86_cpuid(CPUX86State *env, uint32_t index, uint32_t count,
*ecx |= 1 << 1; /* CmpLegacy bit */
}
}
-
- if (kvm_enabled()) {
- /* Nested SVM not yet supported in upstream QEMU */
- *ecx &= ~CPUID_EXT3_SVM;
- }
break;
case 0x80000002:
case 0x80000003:
@@ -1184,10 +1220,17 @@ void cpu_x86_cpuid(CPUX86State *env, uint32_t index, uint32_t count,
}
break;
case 0x8000000A:
- *eax = 0x00000001; /* SVM Revision */
- *ebx = 0x00000010; /* nr of ASIDs */
- *ecx = 0;
- *edx = 0; /* optional features */
+ if (env->cpuid_ext3_features & CPUID_EXT3_SVM) {
+ *eax = 0x00000001; /* SVM Revision */
+ *ebx = 0x00000010; /* nr of ASIDs */
+ *ecx = 0;
+ *edx = env->cpuid_svm_features; /* optional features */
+ } else {
+ *eax = 0;
+ *ebx = 0;
+ *ecx = 0;
+ *edx = 0;
+ }
break;
default:
/* reserved values: zero */
generated by cgit v1.2.3 (git 2.26.2) at 2024-12-12 12:19:12 +0000