From patchwork Thu Jul 10 17:44:38 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexander Graf X-Patchwork-Id: 368728 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 1D641140144 for ; Fri, 11 Jul 2014 03:44:52 +1000 (EST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751900AbaGJRom (ORCPT ); Thu, 10 Jul 2014 13:44:42 -0400 Received: from cantor2.suse.de ([195.135.220.15]:41371 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751865AbaGJRol (ORCPT ); Thu, 10 Jul 2014 13:44:41 -0400 Received: from relay1.suse.de (charybdis-ext.suse.de [195.135.220.254]) by mx2.suse.de (Postfix) with ESMTP id 6CEC0AD94; Thu, 10 Jul 2014 17:44:40 +0000 (UTC) From: Alexander Graf To: kvm-ppc@vger.kernel.org Cc: kvm@vger.kernel.org Subject: [PATCH 1/2] KVM: PPC: Deflect page write faults properly in kvmppc_st Date: Thu, 10 Jul 2014 19:44:38 +0200 Message-Id: <1405014279-21171-2-git-send-email-agraf@suse.de> X-Mailer: git-send-email 1.7.12.4 In-Reply-To: <1405014279-21171-1-git-send-email-agraf@suse.de> References: <1405014279-21171-1-git-send-email-agraf@suse.de> Sender: kvm-ppc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm-ppc@vger.kernel.org When we have a page that we're not allowed to write to, xlate() will already tell us -EPERM on lookup of that page. With the code as is we change it into a "page missing" error which a guest may get confused about. Instead, just tell the caller about the -EPERM directly. This fixes Mac OS X guests when run with DCBZ32 emulation. Signed-off-by: Alexander Graf --- arch/powerpc/kvm/book3s.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/arch/powerpc/kvm/book3s.c b/arch/powerpc/kvm/book3s.c index bd75902..9624c56 100644 --- a/arch/powerpc/kvm/book3s.c +++ b/arch/powerpc/kvm/book3s.c @@ -418,11 +418,13 @@ int kvmppc_st(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr, bool data) { struct kvmppc_pte pte; + int r; vcpu->stat.st++; - if (kvmppc_xlate(vcpu, *eaddr, data, true, &pte)) - return -ENOENT; + r = kvmppc_xlate(vcpu, *eaddr, data, true, &pte); + if (r < 0) + return r; *eaddr = pte.raddr;