KVM: SVM: Intercept RDPMC

Intercept RDPMC and forward it to the PMU emulation code.

Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>

diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index e32243e..5fa553b 100644 (file)
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -1014,6 +1014,7 @@ static void init_vmcb(struct vcpu_svm *svm)
        set_intercept(svm, INTERCEPT_NMI);
        set_intercept(svm, INTERCEPT_SMI);
        set_intercept(svm, INTERCEPT_SELECTIVE_CR0);
+       set_intercept(svm, INTERCEPT_RDPMC);
        set_intercept(svm, INTERCEPT_CPUID);
        set_intercept(svm, INTERCEPT_INVD);
        set_intercept(svm, INTERCEPT_HLT);
@@ -2770,6 +2771,19 @@ static int emulate_on_interception(struct vcpu_svm *svm)
        return emulate_instruction(&svm->vcpu, 0) == EMULATE_DONE;
 }
 
+static int rdpmc_interception(struct vcpu_svm *svm)
+{
+       int err;
+
+       if (!static_cpu_has(X86_FEATURE_NRIPS))
+               return emulate_on_interception(svm);
+
+       err = kvm_rdpmc(&svm->vcpu);
+       kvm_complete_insn_gp(&svm->vcpu, err);
+
+       return 1;
+}
+
 bool check_selective_cr0_intercepted(struct vcpu_svm *svm, unsigned long val)
 {
        unsigned long cr0 = svm->vcpu.arch.cr0;
@@ -3190,6 +3204,7 @@ static int (*svm_exit_handlers[])(struct vcpu_svm *svm) = {
        [SVM_EXIT_SMI]                          = nop_on_interception,
        [SVM_EXIT_INIT]                         = nop_on_interception,
        [SVM_EXIT_VINTR]                        = interrupt_window_interception,
+       [SVM_EXIT_RDPMC]                        = rdpmc_interception,
        [SVM_EXIT_CPUID]                        = cpuid_interception,
        [SVM_EXIT_IRET]                         = iret_interception,
        [SVM_EXIT_INVD]                         = emulate_on_interception,