From: Chao Peng <[email protected]> Implement Intel processor trace virtualization callbacks to suppress host event in guest only mode.
Signed-off-by: Chao Peng <[email protected]> Signed-off-by: Luwei Kang <[email protected]> --- arch/x86/kvm/vmx.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index f0cae7c..28d255d 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -2114,6 +2114,21 @@ static unsigned long segment_base(u16 selector) } #endif +static enum pt_mode pt_mode_get(void) +{ + return pt_mode; +} + +static bool pt_pmi(void) +{ + return true; +} + +static struct pt_virt_ops pt_virt_ops = { + .get_mode = pt_mode_get, + .pmi = pt_pmi, +}; + static void vmx_save_host_state(struct kvm_vcpu *vcpu) { struct vcpu_vmx *vmx = to_vmx(vcpu); @@ -6945,6 +6960,9 @@ 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_GUEST) + pt_register_virt_ops(&pt_virt_ops); + return alloc_kvm_area(); out: @@ -6961,6 +6979,9 @@ static __exit void hardware_unsetup(void) for (i = 0; i < VMX_BITMAP_NR; i++) free_page((unsigned long)vmx_bitmap[i]); + if (pt_mode == PT_MODE_GUEST) + pt_unregister_virt_ops(); + free_kvm_area(); } -- 1.8.3.1
