On 19/01/19 21:04, Luwei Kang wrote:
> static struct pt_pmu pt_pmu;
>
> @@ -1260,6 +1262,14 @@ void intel_pt_interrupt(void)
> struct pt_buffer *buf;
> struct perf_event *event = pt->handle.event;
>
> + if (pt->vcpu) {
> + /* Inject PMI to Guest */
> + kvm_make_request(KVM_REQ_PMI, pt->vcpu);
> + __set_bit(MSR_CORE_PERF_GLOBAL_OVF_CTRL_TRACE_TOPA_PMI_BIT,
> + (unsigned long *)&pt->vcpu->arch.pmu.global_status);
> + return;
> + }
> +
There is no need to touch struct pt and to know details of KVM in
arch/x86/events. Please add a function pointer
void (*kvm_handle_pt_interrupt)(void);
to some header, and in handle_pmi_common do
if (unlikely(kvm_handle_intel_pt_interrupt))
kvm_handle_intel_pt_interrupt();
else
intel_pt_interrupt();
The function pointer can be assigned in
kvm_before_interrupt/kvm_after_interrupt just like you do now.
This should be a simpler patch too.
Paolo
