kvm: x86: move MSR_IA32_TSC handling to x86.c

This is not specific to Intel/AMD anymore.  The TSC offset is available
in vcpu->arch.tsc_offset.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index e77a536..80ea262 100644 (file)
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -4050,12 +4050,6 @@ static int svm_get_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
        struct vcpu_svm *svm = to_svm(vcpu);
 
        switch (msr_info->index) {
-       case MSR_IA32_TSC: {
-               msr_info->data = svm->vmcb->control.tsc_offset +
-                       kvm_scale_tsc(vcpu, rdtsc());
-
-               break;
-       }
        case MSR_STAR:
                msr_info->data = svm->vmcb->save.star;
                break;
@@ -4208,9 +4202,6 @@ static int svm_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr)
                svm->vmcb->save.g_pat = data;
                mark_dirty(svm->vmcb, VMCB_NPT);
                break;
-       case MSR_IA32_TSC:
-               kvm_write_tsc(vcpu, msr);
-               break;
        case MSR_IA32_SPEC_CTRL:
                if (!msr->host_initiated &&
                    !guest_cpuid_has(vcpu, X86_FEATURE_IBRS))

diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 7207e6c..5b49ad4 100644 (file)
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -2886,20 +2886,6 @@ static u64 vmx_read_l1_tsc_offset(struct kvm_vcpu *vcpu)
 }
 
 /*
- * reads and returns guest's timestamp counter "register"
- * guest_tsc = (host_tsc * tsc multiplier) >> 48 + tsc_offset
- * -- Intel TSC Scaling for Virtualization White Paper, sec 1.3
- */
-static u64 guest_read_tsc(struct kvm_vcpu *vcpu)
-{
-       u64 host_tsc, tsc_offset;
-
-       host_tsc = rdtsc();
-       tsc_offset = vmcs_read64(TSC_OFFSET);
-       return kvm_scale_tsc(vcpu, host_tsc) + tsc_offset;
-}
-
-/*
  * writes 'offset' into guest's timestamp counter offset register
  */
 static void vmx_write_tsc_offset(struct kvm_vcpu *vcpu, u64 offset)
@@ -3529,9 +3515,6 @@ static int vmx_get_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
 #endif
        case MSR_EFER:
                return kvm_get_msr_common(vcpu, msr_info);
-       case MSR_IA32_TSC:
-               msr_info->data = guest_read_tsc(vcpu);
-               break;
        case MSR_IA32_SPEC_CTRL:
                if (!msr_info->host_initiated &&
                    !guest_cpuid_has(vcpu, X86_FEATURE_IBRS) &&
@@ -3651,9 +3634,6 @@ static int vmx_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
                        return 1;
                vmcs_write64(GUEST_BNDCFGS, data);
                break;
-       case MSR_IA32_TSC:
-               kvm_write_tsc(vcpu, msr_info);
-               break;
        case MSR_IA32_SPEC_CTRL:
                if (!msr_info->host_initiated &&
                    !guest_cpuid_has(vcpu, X86_FEATURE_IBRS) &&

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 3f3fba5..51ecd38 100644 (file)
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -2364,6 +2364,9 @@ int kvm_set_msr_common(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
                        return 1;
                vcpu->arch.smbase = data;
                break;
+       case MSR_IA32_TSC:
+               kvm_write_tsc(vcpu, msr_info);
+               break;
        case MSR_SMI_COUNT:
                if (!msr_info->host_initiated)
                        return 1;
@@ -2607,6 +2610,9 @@ int kvm_get_msr_common(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
        case MSR_IA32_UCODE_REV:
                msr_info->data = vcpu->arch.microcode_version;
                break;
+       case MSR_IA32_TSC:
+               msr_info->data = kvm_scale_tsc(vcpu, rdtsc()) + vcpu->arch.tsc_offset;
+               break;
        case MSR_MTRRcap:
        case 0x200 ... 0x2ff:
                return kvm_mtrr_get_msr(vcpu, msr_info->index, &msr_info->data);