Commit 1739f3d5 authored May 08, 2020 by Jim Mattson Committed by Paolo Bonzini May 15, 2020

KVM: nVMX: Really make emulated nested preemption timer pinned



The PINNED bit is ignored by hrtimer_init. It is only considered when
starting the timer.

When the hrtimer isn't pinned to the same logical processor as the
vCPU thread to be interrupted, the emulated VMX-preemption timer
often fails to adhere to the architectural specification.

Fixes: f15a75ee ("KVM: nVMX: make emulated nested preemption timer pinned")
Signed-off-by: Jim Mattson <jmattson@google.com>
Reviewed-by: Peter Shier <pshier@google.com>
Reviewed-by: Oliver Upton <oupton@google.com>
Message-Id: <20200508203643.85477-2-jmattson@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

parent 6c1c6e58

arch/x86/kvm/vmx/nested.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -2113,7 +2113,7 @@ static void vmx_start_preemption_timer(struct kvm_vcpu *vcpu)
		preemption_timeout *= 1000000;
		do_div(preemption_timeout, vcpu->arch.virtual_tsc_khz);
		hrtimer_start(&vmx->nested.preemption_timer,
		ns_to_ktime(preemption_timeout), HRTIMER_MODE_REL);
		ns_to_ktime(preemption_timeout), HRTIMER_MODE_REL_PINNED);
		}

		static u64 nested_vmx_calc_efer(struct vcpu_vmx vmx, struct vmcs12 vmcs12)

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