Messages in this thread Patch in this message | | | From | Luwei Kang <> | Subject | [PATCH 9/9] KVM: x86: Disable intercept for Intel processor trace MSRs | Date | Mon, 16 Oct 2017 20:14:11 +0800 |
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From: Chao Peng <chao.p.peng@linux.intel.com>
Trap for Intel processor trace is none sense. Pass through to guest directly.
Signed-off-by: Chao Peng <chao.p.peng@linux.intel.com> Signed-off-by: Luwei Kang <luwei.kang@intel.com> --- arch/x86/kvm/vmx.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+)
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index 3c9ce3e..58606ce 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -7076,6 +7076,20 @@ static __init int hardware_setup(void) if (pt_mode == PT_MODE_GUEST) pt_register_virt_ops(&pt_virt_ops); + if (pt_mode == PT_MODE_GUEST || pt_mode == PT_MODE_HOST_GUEST) { + u32 i, eax, ebx, ecx, edx; + + cpuid_count(0x14, 1, &eax, &ebx, &ecx, &edx); + vmx_disable_intercept_for_msr(MSR_IA32_RTIT_CTL, false); + vmx_disable_intercept_for_msr(MSR_IA32_RTIT_STATUS, false); + vmx_disable_intercept_for_msr(MSR_IA32_RTIT_OUTPUT_BASE, false); + vmx_disable_intercept_for_msr(MSR_IA32_RTIT_OUTPUT_MASK, false); + vmx_disable_intercept_for_msr(MSR_IA32_RTIT_CR3_MATCH, false); + for (i = 0; i < (eax & 0x7); i++) + vmx_disable_intercept_for_msr(MSR_IA32_RTIT_ADDR0_A + i, + false); + } + return alloc_kvm_area(); out: -- 1.8.3.1
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