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| author |   Jim Mattson <jmattson@google.com> | 2018-11-09 09:35:11 -0800 |
|---|---|---|
| committer |   Paolo Bonzini <pbonzini@redhat.com> | 2018-12-21 11:28:24 +0100 |
| commit | 788fc1e9ad8e1d332d3a18692028d1faee6fabb0 (patch) | |
| tree | ec1fb1f051a282db82ea63d955bbd3c8430e73dc /arch/x86/kvm/vmx/vmx.c | |
| parent | kvm: nVMX: NMI-window and interrupt-window exiting should wake L2 from HLT (diff) | |
| download | linux-dev-788fc1e9ad8e1d332d3a18692028d1faee6fabb0.tar.xz linux-dev-788fc1e9ad8e1d332d3a18692028d1faee6fabb0.zip | |
kvm: vmx: Allow guest read access to IA32_TSC
Let the guest read the IA32_TSC MSR with the generic RDMSR instruction
as well as the specific RDTSC(P) instructions. Note that the hardware
applies the TSC multiplier and offset (when applicable) to the result of
RDMSR(IA32_TSC), just as it does to the result of RDTSC(P).
Signed-off-by: Jim Mattson <jmattson@google.com>
Reviewed-by: Peter Shier <pshier@google.com>
Reviewed-by: Marc Orr <marcorr@google.com>
Reviewed-by: Liran Alon <liran.alon@oracle.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
Diffstat (limited to '')
| -rw-r--r-- | arch/x86/kvm/vmx/vmx.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c index d5e81485fc15..9b58921f5cd3 100644 --- a/arch/x86/kvm/vmx/vmx.c +++ b/arch/x86/kvm/vmx/vmx.c @@ -6401,6 +6401,7 @@ static struct kvm_vcpu *vmx_create_vcpu(struct kvm *kvm, unsigned int id) goto free_msrs; msr_bitmap = vmx->vmcs01.msr_bitmap; + vmx_disable_intercept_for_msr(msr_bitmap, MSR_IA32_TSC, MSR_TYPE_R); vmx_disable_intercept_for_msr(msr_bitmap, MSR_FS_BASE, MSR_TYPE_RW); vmx_disable_intercept_for_msr(msr_bitmap, MSR_GS_BASE, MSR_TYPE_RW); vmx_disable_intercept_for_msr(msr_bitmap, MSR_KERNEL_GS_BASE, MSR_TYPE_RW); |