kvm: svm: Always set svm->last_cpu on VMRUN (24263634) · Commits · 戴 / test

Previously, this field was only set when using SEV. Set it for all vCPU configurations, so that it can be communicated to userspace for diagnosing potential hardware errors. Signed-off-by:

Jim Mattson <jmattson@google.com> Reviewed-by:

Oliver Upton <oupton@google.com> Reviewed-by:

Peter Shier <pshier@google.com> Message-Id: <20200603235623.245638-3-jmattson@google.com> Signed-off-by:

Paolo Bonzini <pbonzini@redhat.com>

arch/x86/kvm/svm/sev.c

+0 −1

Original line number	Diff line number	Diff line
		@@ -1189,7 +1189,6 @@ void pre_sev_run(struct vcpu_svm *svm, int cpu)
		svm->last_cpu == cpu)
		return;

		svm->last_cpu = cpu;
		sd->sev_vmcbs[asid] = svm->vmcb;
		svm->vmcb->control.tlb_ctl = TLB_CONTROL_FLUSH_ASID;
		mark_dirty(svm->vmcb, VMCB_ASID);

arch/x86/kvm/svm/svm.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -3396,6 +3396,7 @@ static __no_kcsan fastpath_t svm_vcpu_run(struct kvm_vcpu *vcpu)
		*/
		x86_spec_ctrl_set_guest(svm->spec_ctrl, svm->virt_spec_ctrl);

		svm->last_cpu = vcpu->cpu;
		__svm_vcpu_run(svm->vmcb_pa, (unsigned long *)&svm->vcpu.arch.regs);

		#ifdef CONFIG_X86_64

Admin message