[PATCH 11/12] kvm: x86: Pass KVMState to kvm_arch_get_supported_cpuid

Jan Kiszka
2011-06-08T14:11:16Z

kvm_arch_get_supported_cpuid checks for global cpuid restrictions, it
does not require any CPUState reference. Changing its interface allows
to call it before any VCPU is initialized.

CC: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
---
kvm.h | 2 +-
target-i386/cpuid.c | 20 ++++++++++++--------
target-i386/kvm.c | 30 +++++++++++++++---------------
3 files changed, 28 insertions(+), 24 deletions(-)

diff --git a/kvm.h b/kvm.h
index d565dba..243b063 100644
--- a/kvm.h
+++ b/kvm.h
@@ -157,7 +157,7 @@ bool kvm_arch_stop_on_emulation_error(CPUState *env);

int kvm_check_extension(KVMState *s, unsigned int extension);

-uint32_t kvm_arch_get_supported_cpuid(CPUState *env, uint32_t function,
+uint32_t kvm_arch_get_supported_cpuid(KVMState *env, uint32_t function,
uint32_t index, int reg);
void kvm_cpu_synchronize_state(CPUState *env);
void kvm_cpu_synchronize_post_reset(CPUState *env);
diff --git a/target-i386/cpuid.c b/target-i386/cpuid.c
index 79e7580..e1ae3af 100644
--- a/target-i386/cpuid.c
+++ b/target-i386/cpuid.c
@@ -1144,10 +1144,12 @@ void cpu_x86_cpuid(CPUX86State *env, uint32_t index, uint32_t count,
break;
case 7:
if (kvm_enabled()) {
- *eax = kvm_arch_get_supported_cpuid(env, 0x7, count, R_EAX);
- *ebx = kvm_arch_get_supported_cpuid(env, 0x7, count, R_EBX);
- *ecx = kvm_arch_get_supported_cpuid(env, 0x7, count, R_ECX);
- *edx = kvm_arch_get_supported_cpuid(env, 0x7, count, R_EDX);
+ KVMState *s = env->kvm_state;
+
+ *eax = kvm_arch_get_supported_cpuid(s, 0x7, count, R_EAX);
+ *ebx = kvm_arch_get_supported_cpuid(s, 0x7, count, R_EBX);
+ *ecx = kvm_arch_get_supported_cpuid(s, 0x7, count, R_ECX);
+ *edx = kvm_arch_get_supported_cpuid(s, 0x7, count, R_EDX);
} else {
*eax = 0;
*ebx = 0;
@@ -1179,10 +1181,12 @@ 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);
+ KVMState *s = env->kvm_state;
+
+ *eax = kvm_arch_get_supported_cpuid(s, 0xd, count, R_EAX);
+ *ebx = kvm_arch_get_supported_cpuid(s, 0xd, count, R_EBX);
+ *ecx = kvm_arch_get_supported_cpuid(s, 0xd, count, R_ECX);
+ *edx = kvm_arch_get_supported_cpuid(s, 0xd, count, R_EDX);
} else {
*eax = 0;
*ebx = 0;
diff --git a/target-i386/kvm.c b/target-i386/kvm.c
index 1c2d32c..5ebb054 100644
--- a/target-i386/kvm.c
+++ b/target-i386/kvm.c
@@ -98,12 +98,12 @@ struct kvm_para_features {
{ -1, -1 }
};

-static int get_para_features(CPUState *env)
+static int get_para_features(KVMState *s)
{
int i, features = 0;

for (i = 0; i < ARRAY_SIZE(para_features) - 1; i++) {
- if (kvm_check_extension(env->kvm_state, para_features[i].cap)) {
+ if (kvm_check_extension(s, para_features[i].cap)) {
features |= (1 << para_features[i].feature);
}
}
@@ -112,7 +112,7 @@ static int get_para_features(CPUState *env)
}

-uint32_t kvm_arch_get_supported_cpuid(CPUState *env, uint32_t function,
+uint32_t kvm_arch_get_supported_cpuid(KVMState *s, uint32_t function,
uint32_t index, int reg)
{
struct kvm_cpuid2 *cpuid;
@@ -122,7 +122,7 @@ uint32_t kvm_arch_get_supported_cpuid(CPUState *env, uint32_t function,
int has_kvm_features = 0;

max = 1;
- while ((cpuid = try_get_cpuid(env->kvm_state, max)) == NULL) {
+ while ((cpuid = try_get_cpuid(s, max)) == NULL) {
max *= 2;
}

@@ -153,7 +153,7 @@ uint32_t kvm_arch_get_supported_cpuid(CPUState *env, uint32_t function,
/* On Intel, kvm returns cpuid according to the Intel spec,
* so add missing bits according to the AMD spec:
*/
- cpuid_1_edx = kvm_arch_get_supported_cpuid(env, 1, 0, R_EDX);
+ cpuid_1_edx = kvm_arch_get_supported_cpuid(s, 1, 0, R_EDX);
ret |= cpuid_1_edx & 0x183f7ff;
break;
}
@@ -166,7 +166,7 @@ uint32_t kvm_arch_get_supported_cpuid(CPUState *env, uint32_t function,

/* fallback for older kernels */
if (!has_kvm_features && (function == KVM_CPUID_FEATURES)) {
- ret = get_para_features(env);
+ ret = get_para_features(s);
}

return ret;
@@ -349,25 +349,25 @@ int kvm_arch_init_vcpu(CPUState *env)
struct kvm_cpuid2 cpuid;
struct kvm_cpuid_entry2 entries[100];
} __attribute__((packed)) cpuid_data;
+ KVMState *s = env->kvm_state;
uint32_t limit, i, j, cpuid_i;
uint32_t unused;
struct kvm_cpuid_entry2 *c;
uint32_t signature[3];

- env->cpuid_features &= kvm_arch_get_supported_cpuid(env, 1, 0, R_EDX);
+ env->cpuid_features &= kvm_arch_get_supported_cpuid(s, 1, 0, R_EDX);

i = env->cpuid_ext_features & CPUID_EXT_HYPERVISOR;
- env->cpuid_ext_features &= kvm_arch_get_supported_cpuid(env, 1, 0, R_ECX);
+ env->cpuid_ext_features &= kvm_arch_get_supported_cpuid(s, 1, 0, R_ECX);
env->cpuid_ext_features |= i;

- env->cpuid_ext2_features &= kvm_arch_get_supported_cpuid(env, 0x80000001,
+ env->cpuid_ext2_features &= kvm_arch_get_supported_cpuid(s, 0x80000001,
0, R_EDX);
- env->cpuid_ext3_features &= kvm_arch_get_supported_cpuid(env, 0x80000001,
+ env->cpuid_ext3_features &= kvm_arch_get_supported_cpuid(s, 0x80000001,
0, R_ECX);
- env->cpuid_svm_features &= kvm_arch_get_supported_cpuid(env, 0x8000000A,
+ env->cpuid_svm_features &= kvm_arch_get_supported_cpuid(s, 0x8000000A,
0, R_EDX);

-
cpuid_i = 0;

/* Paravirtualization CPUIDs */
@@ -383,8 +383,8 @@ int kvm_arch_init_vcpu(CPUState *env)
c = &cpuid_data.entries[cpuid_i++];
memset(c, 0, sizeof(*c));
c->function = KVM_CPUID_FEATURES;
- c->eax = env->cpuid_kvm_features & kvm_arch_get_supported_cpuid(env,
- KVM_CPUID_FEATURES, 0, R_EAX);
+ c->eax = env->cpuid_kvm_features &
+ kvm_arch_get_supported_cpuid(s, KVM_CPUID_FEATURES, 0, R_EAX);

has_msr_async_pf_en = c->eax & (1 << KVM_FEATURE_ASYNC_PF);

@@ -453,7 +453,7 @@ int kvm_arch_init_vcpu(CPUState *env)
/* Call Centaur's CPUID instructions they are supported. */
if (env->cpuid_xlevel2 > 0) {
env->cpuid_ext4_features &=
- kvm_arch_get_supported_cpuid(env, 0xC0000001, 0, R_EDX);
+ kvm_arch_get_supported_cpuid(s, 0xC0000001, 0, R_EDX);
cpu_x86_cpuid(env, 0xC0000000, 0, &limit, &unused, &unused, &unused);

for (i = 0xC0000000; i <= limit; i++) {
--
1.7.1