Report paravirt features on cpuid.
Signed-off-by: Marcelo Tosatti <[EMAIL PROTECTED]>
Index: kvm-userspace/qemu/qemu-kvm-x86.c
===================================================================
--- kvm-userspace.orig/qemu/qemu-kvm-x86.c
+++ kvm-userspace/qemu/qemu-kvm-x86.c
@@ -20,6 +20,8 @@
#define MSR_IA32_TSC 0x10
+#define ARRAY_SIZE(a) (sizeof(a) / sizeof(a[0]))
+
static struct kvm_msr_list *kvm_msr_list;
extern unsigned int kvm_shadow_memory;
extern kvm_context_t kvm_context;
@@ -493,6 +495,40 @@ static void do_cpuid_ent(struct kvm_cpui
}
}
+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_MMU_WRITE
+ { KVM_CAP_MMU_WRITE, KVM_FEATURE_MMU_WRITE },
+#endif
+#ifdef KVM_CAP_MULTICALL
+ { KVM_CAP_MULTICALL, KVM_FEATURE_MULTICALL },
+#endif
+#ifdef KVM_CAP_CR3_CACHE
+ { KVM_CAP_CR3_CACHE, KVM_FEATURE_CR3_CACHE },
+#endif
+ { -1, -1 }
+};
+
+static int get_para_features(kvm_context_t kvm_context)
+{
+ int i, features = 0;
+
+ for (i = 0; i < ARRAY_SIZE(para_features)-1; i++) {
+ if (kvm_check_extension(kvm_context, para_features[i].cap))
+ features |= (1 << para_features[i].feature);
+ }
+
+ return features;
+}
+
int kvm_arch_qemu_init_env(CPUState *cenv)
{
struct kvm_cpuid_entry cpuid_ent[100];
@@ -503,10 +539,6 @@ int kvm_arch_qemu_init_env(CPUState *cen
int cpuid_nent = 0;
CPUState copy;
uint32_t i, limit;
- int has_clocksource = 0;
-#ifdef KVM_CAP_CLOCKSOURCE
- has_clocksource = kvm_check_extension(kvm_context, KVM_CAP_CLOCKSOURCE);
-#endif
copy = *cenv;
@@ -524,7 +556,7 @@ int kvm_arch_qemu_init_env(CPUState *cen
pv_ent = &cpuid_ent[cpuid_nent++];
memset(pv_ent, 0, sizeof(*pv_ent));
pv_ent->function = KVM_CPUID_FEATURES;
- pv_ent->eax = (has_clocksource << KVM_FEATURE_CLOCKSOURCE);
+ pv_ent->eax = get_para_features(kvm_context);
#endif
copy.regs[R_EAX] = 0;
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