As we already do in svm, record the last logical processor on which a
vCPU has run, so that it can be communicated to userspace for
potential hardware errors.
Signed-off-by: Jim Mattson <jmattson@xxxxxxxxxx>
Reviewed-by: Oliver Upton <oupton@xxxxxxxxxx>
Reviewed-by: Peter Shier <pshier@xxxxxxxxxx>
---
arch/x86/kvm/vmx/vmx.c | 1 +
arch/x86/kvm/vmx/vmx.h | 3 +++
2 files changed, 4 insertions(+)
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index 170cc76a581f..42856970d3b8 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -6730,6 +6730,7 @@ static fastpath_t vmx_vcpu_run(struct kvm_vcpu *vcpu)
if (vcpu->arch.cr2 != read_cr2())
write_cr2(vcpu->arch.cr2);
+ vmx->last_cpu = vcpu->cpu;
vmx->fail = __vmx_vcpu_run(vmx, (unsigned long *)&vcpu->arch.regs,
vmx->loaded_vmcs->launched);
diff --git a/arch/x86/kvm/vmx/vmx.h b/arch/x86/kvm/vmx/vmx.h
index 672c28f17e49..8a1e833cf4fb 100644
--- a/arch/x86/kvm/vmx/vmx.h
+++ b/arch/x86/kvm/vmx/vmx.h
@@ -302,6 +302,9 @@ struct vcpu_vmx {
u64 ept_pointer;
struct pt_desc pt_desc;
+
+ /* which host CPU was used for running this vcpu */
+ unsigned int last_cpu;
};
enum ept_pointers_status {
--
2.27.0.rc2.251.g90737beb825-goog
