[RFC PATCH 7/7] [hyper-v] init hyper-v cpuid leafs

Vadim Rozenfeld
2011-10-09T18:53:21Z

---
target-i386/kvm.c | 53 ++++++++++++++++++++++++++++++++++++++++++++++++++++-
1 files changed, 52 insertions(+), 1 deletions(-)

diff --git a/target-i386/kvm.c b/target-i386/kvm.c
index 3840255..74fcc9a 100644
--- a/target-i386/kvm.c
+++ b/target-i386/kvm.c
@@ -29,6 +29,7 @@
#include "hw/pc.h"
#include "hw/apic.h"
#include "ioport.h"
+#include "hyperv.h"

//#define DEBUG_KVM

@@ -379,11 +380,21 @@ int kvm_arch_init_vcpu(CPUState *env)
cpuid_i = 0;

/* Paravirtualization CPUIDs */
- memcpy(signature, "KVMKVMKVM\0\0\0", 12);
c = &cpuid_data.entries[cpuid_i++];
memset(c, 0, sizeof(*c));
c->function = KVM_CPUID_SIGNATURE;
+#ifndef CONFIG_HYPERV
+ memcpy(signature, "KVMKVMKVM\0\0\0", 12);
c->eax = 0;
+#else
+ if (!hyperv_enabled()) {
+ memcpy(signature, "KVMKVMKVM\0\0\0", 12);
+ c->eax = 0;
+ } else {
+ memcpy(signature, "Microsoft Hv", 12);
+ c->eax = HYPERV_CPUID_MIN;
+ }
+#endif
c->ebx = signature[0];
c->ecx = signature[1];
c->edx = signature[2];
@@ -393,6 +404,46 @@ int kvm_arch_init_vcpu(CPUState *env)
c->function = KVM_CPUID_FEATURES;
c->eax = env->cpuid_kvm_features &
kvm_arch_get_supported_cpuid(s, KVM_CPUID_FEATURES, 0, R_EAX);
+#ifdef CONFIG_HYPERV
+ if (hyperv_enabled()) {
+ memcpy(signature, "Hv#1\0\0\0\0\0\0\0\0", 12);
+ c->eax = signature[0];
+
+ c = &cpuid_data.entries[cpuid_i++];
+ memset(c, 0, sizeof(*c));
+ c->function = HYPERV_CPUID_VERSION;
+ c->eax = 0x00001bbc;
+ c->ebx = 0x00060001;
+
+ c = &cpuid_data.entries[cpuid_i++];
+ memset(c, 0, sizeof(*c));
+ c->function = HYPERV_CPUID_FEATURES;
+ if (hyperv_relaxed_timing()) {
+ c->eax |= HV_X64_MSR_HYPERCALL_AVAILABLE;
+ }
+ if (hyperv_apic_recommended()) {
+ c->eax |= HV_X64_MSR_HYPERCALL_AVAILABLE;
+ c->eax |= HV_X64_MSR_APIC_ACCESS_AVAILABLE;
+ }
+
+ c = &cpuid_data.entries[cpuid_i++];
+ memset(c, 0, sizeof(*c));
+ c->function = HYPERV_CPUID_ENLIGHTMENT_INFO;
+ if (hyperv_relaxed_timing()) {
+ c->eax |= HV_X64_RELAXED_TIMING_RECOMMENDED;
+ }
+ if (hyperv_apic_recommended()) {
+ c->eax |= HV_X64_APIC_ACCESS_RECOMMENDED;
+ }
+ c->ebx = hyperv_spinlock_retries();
+
+ c = &cpuid_data.entries[cpuid_i++];
+ memset(c, 0, sizeof(*c));
+ c->function = HYPERV_CPUID_IMPLEMENT_LIMITS;
+ c->eax = 0x40;
+ c->ebx = 0x40;
+ }
+#endif

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

--
1.7.4.4