From mboxrd@z Thu Jan 1 00:00:00 1970 From: Cornelia Huck Subject: [PATCH 1/3] s390/kvm: Set CPU in stopped state on initial cpu reset Date: Mon, 11 Jun 2012 16:06:57 +0200 Message-ID: <1339423619-42299-2-git-send-email-cornelia.huck@de.ibm.com> References: <1339423619-42299-1-git-send-email-cornelia.huck@de.ibm.com> Cc: Christian Borntraeger , Carsten Otte , Alexander Graf , Heiko Carstens , Martin Schwidefsky , KVM , linux-s390 To: Avi Kivity , Marcelo Tosatti Return-path: Received: from e06smtp10.uk.ibm.com ([195.75.94.106]:57827 "EHLO e06smtp10.uk.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754452Ab2FKOHh (ORCPT ); Mon, 11 Jun 2012 10:07:37 -0400 Received: from /spool/local by e06smtp10.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Mon, 11 Jun 2012 15:07:35 +0100 In-Reply-To: <1339423619-42299-1-git-send-email-cornelia.huck@de.ibm.com> Sender: kvm-owner@vger.kernel.org List-ID: From: Christian Borntraeger The initial cpu reset sets the cpu in the stopped state. Several places check for the cpu state (e.g. sigp set prefix) and not setting the STOPPED state triggered errors with newer guest kernels after reboot. Signed-off-by: Christian Borntraeger Signed-off-by: Cornelia Huck --- arch/s390/kvm/kvm-s390.c | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c index 664766d..ace9360 100644 --- a/arch/s390/kvm/kvm-s390.c +++ b/arch/s390/kvm/kvm-s390.c @@ -347,6 +347,7 @@ static void kvm_s390_vcpu_initial_reset(struct kvm_vcpu *vcpu) vcpu->arch.guest_fpregs.fpc = 0; asm volatile("lfpc %0" : : "Q" (vcpu->arch.guest_fpregs.fpc)); vcpu->arch.sie_block->gbea = 1; + atomic_set_mask(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags); } int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) -- 1.7.10.4