From 8fbe6a541f50eeec5e3e49bd92db23ade9496673 Mon Sep 17 00:00:00 2001 From: Florian Westphal Date: Wed, 15 Aug 2012 16:00:40 +0200 Subject: [PATCH] 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: Florian Westphal Signed-off-by: Marcelo Tosatti --- arch/x86/kernel/kvm.c | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/x86/kernel/kvm.c b/arch/x86/kernel/kvm.c index c1d61ee4b4f1..1596cc8fd793 100644 --- a/arch/x86/kernel/kvm.c +++ b/arch/x86/kernel/kvm.c @@ -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,