Commit 8fbe6a54 authored by Florian Westphal's avatar Florian Westphal Committed by Marcelo Tosatti
Browse files

KVM guest: disable stealtime on reboot to avoid mem corruption 



else, host continues to update stealtime after reboot,
which can corrupt e.g. initramfs area.
found when tracking down initramfs unpack error on initial reboot
(with qemu-kvm -smp 2, no problem with single-core).

Signed-off-by: default avatarFlorian Westphal <fw@strlen.de>
Signed-off-by: default avatarMarcelo Tosatti <mtosatti@redhat.com>
parent 28a6fdab

arch/x86/kernel/kvm.c

+1 −0
Original line number Diff line number Diff line
@@ -354,6 +354,7 @@ static void kvm_pv_guest_cpu_reboot(void *unused) 
	if (kvm_para_has_feature(KVM_FEATURE_PV_EOI))

		wrmsrl(MSR_KVM_PV_EOI_EN, 0);

	kvm_pv_disable_apf();

	kvm_disable_steal_time();

}



static int kvm_pv_reboot_notify(struct notifier_block *nb,