From: Chao Peng <chao.p.peng@xxxxxxxxxxxxxxx>
Implement Intel processor trace virtualization callbacks to
suppress host event in guest only mode.
Signed-off-by: Chao Peng <chao.p.peng@xxxxxxxxxxxxxxx>
Signed-off-by: Luwei Kang <luwei.kang@xxxxxxxxx>
---
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
