From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1763612AbbA2DDX (ORCPT ); Wed, 28 Jan 2015 22:03:23 -0500 Received: from youngberry.canonical.com ([91.189.89.112]:47005 "EHLO youngberry.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759357AbbA2Chj (ORCPT ); Wed, 28 Jan 2015 21:37:39 -0500 From: Kamal Mostafa To: linux-kernel@vger.kernel.org, stable@vger.kernel.org, kernel-team@lists.ubuntu.com Cc: Christian Borntraeger , Kamal Mostafa Subject: [PATCH 3.13.y-ckt 027/139] KVM: s390: flush CPU on load control Date: Wed, 28 Jan 2015 14:19:30 -0800 Message-Id: <1422483682-15393-28-git-send-email-kamal@canonical.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1422483682-15393-1-git-send-email-kamal@canonical.com> References: <1422483682-15393-1-git-send-email-kamal@canonical.com> X-Extended-Stable: 3.13 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 3.13.11-ckt15 -stable review patch. If anyone has any objections, please let me know. ------------------ From: Christian Borntraeger commit 2dca485f8740208604543c3960be31a5dd3ea603 upstream. some control register changes will flush some aspects of the CPU, e.g. POP explicitely mentions that for CR9-CR11 "TLBs may be cleared". Instead of trying to be clever and only flush on specific CRs, let play safe and flush on all lctl(g) as future machines might define new bits in CRs. Load control intercept should not happen that often. Signed-off-by: Christian Borntraeger Acked-by: Cornelia Huck Reviewed-by: David Hildenbrand Signed-off-by: Kamal Mostafa --- arch/s390/kvm/priv.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/s390/kvm/priv.c b/arch/s390/kvm/priv.c index 2440602..8821ac8 100644 --- a/arch/s390/kvm/priv.c +++ b/arch/s390/kvm/priv.c @@ -688,7 +688,7 @@ int kvm_s390_handle_lctl(struct kvm_vcpu *vcpu) break; reg = (reg + 1) % 16; } while (1); - + kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu); return 0; } @@ -725,7 +725,7 @@ static int handle_lctlg(struct kvm_vcpu *vcpu) break; reg = (reg + 1) % 16; } while (1); - + kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu); return 0; } -- 1.9.1