From: Chao Peng <[email protected]> Pass through Intel processor trace to guest directly.
Signed-off-by: Chao Peng <[email protected]> Signed-off-by: Luwei Kang <[email protected]> --- arch/x86/kvm/vmx.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index 8f61a8d..01447e2 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -7029,6 +7029,19 @@ static __init int hardware_setup(void) !cpu_has_vmx_intel_pt() || !cpu_has_vmx_pt_use_gpa()) pt_mode = PT_MODE_SYSTEM; + if (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_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
