From patchwork Wed Jul 3 12:42:36 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mihai Caraman X-Patchwork-Id: 256615 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 E27BE2C02FA for ; Wed, 3 Jul 2013 22:44:13 +1000 (EST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756218Ab3GCMoN (ORCPT ); Wed, 3 Jul 2013 08:44:13 -0400 Received: from co1ehsobe005.messaging.microsoft.com ([216.32.180.188]:33743 "EHLO co1outboundpool.messaging.microsoft.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754019Ab3GCMoM (ORCPT ); Wed, 3 Jul 2013 08:44:12 -0400 Received: from mail161-co1-R.bigfish.com (10.243.78.249) by CO1EHSOBE016.bigfish.com (10.243.66.79) with Microsoft SMTP Server id 14.1.225.22; Wed, 3 Jul 2013 12:44:11 +0000 Received: from mail161-co1 (localhost [127.0.0.1]) by mail161-co1-R.bigfish.com (Postfix) with ESMTP id 6D9FE920389; Wed, 3 Jul 2013 12:44:11 +0000 (UTC) X-Forefront-Antispam-Report: CIP:70.37.183.190; KIP:(null); UIP:(null); IPV:NLI; H:mail.freescale.net; RD:none; EFVD:NLI X-SpamScore: 3 X-BigFish: VS3(zcb8kzzz1f42h1ee6h1de0h1fdah2073h1202h1e76h1d1ah1d2ah1fc6hzz8275bhz2dh2a8h668h839hd24he5bhf0ah1288h12a5h12a9h12bdh12e5h137ah139eh13b6h1441h1504h1537h162dh1631h1758h1898h18e1h1946h19b5h1ad9h1b0ah1d0ch1d2eh1d3fh1dfeh1dffh1e23h1155h) Received: from mail161-co1 (localhost.localdomain [127.0.0.1]) by mail161-co1 (MessageSwitch) id 1372855395433959_25549; Wed, 3 Jul 2013 12:43:15 +0000 (UTC) Received: from CO1EHSMHS002.bigfish.com (unknown [10.243.78.246]) by mail161-co1.bigfish.com (Postfix) with ESMTP id 02AA91A025A; Wed, 3 Jul 2013 12:43:06 +0000 (UTC) Received: from mail.freescale.net (70.37.183.190) by CO1EHSMHS002.bigfish.com (10.243.66.12) with Microsoft SMTP Server (TLS) id 14.1.225.23; Wed, 3 Jul 2013 12:43:05 +0000 Received: from az84smr01.freescale.net (10.64.34.197) by 039-SN1MMR1-001.039d.mgd.msft.net (10.84.1.13) with Microsoft SMTP Server (TLS) id 14.2.328.11; Wed, 3 Jul 2013 12:43:04 +0000 Received: from fsr-fed1364-13.ea.freescale.net (fsr-fed1364-13.ea.freescale.net [10.171.81.124]) by az84smr01.freescale.net (8.14.3/8.14.0) with ESMTP id r63CgvO3012922; Wed, 3 Jul 2013 05:43:02 -0700 From: Mihai Caraman To: CC: , , Mihai Caraman Subject: [PATCH 3/6] KVM: PPC: Book3E: Increase FPU laziness Date: Wed, 3 Jul 2013 15:42:36 +0300 Message-ID: <1372855359-13452-4-git-send-email-mihai.caraman@freescale.com> X-Mailer: git-send-email 1.7.3.4 In-Reply-To: <1372855359-13452-1-git-send-email-mihai.caraman@freescale.com> References: <1372855359-13452-1-git-send-email-mihai.caraman@freescale.com> MIME-Version: 1.0 X-OriginatorOrg: freescale.com Sender: kvm-ppc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm-ppc@vger.kernel.org Increase FPU laziness by calling kvmppc_load_guest_fp() just before returning to guest instead of each sched in. Without this improvement an interrupt may also claim floting point corrupting guest state. Signed-off-by: Mihai Caraman --- arch/powerpc/kvm/booke.c | 1 + arch/powerpc/kvm/e500mc.c | 2 -- 2 files changed, 1 insertions(+), 2 deletions(-) diff --git a/arch/powerpc/kvm/booke.c b/arch/powerpc/kvm/booke.c index 113961f..3cae2e3 100644 --- a/arch/powerpc/kvm/booke.c +++ b/arch/powerpc/kvm/booke.c @@ -1204,6 +1204,7 @@ int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu, r = (s << 2) | RESUME_HOST | (r & RESUME_FLAG_NV); } else { kvmppc_lazy_ee_enable(); + kvmppc_load_guest_fp(vcpu); } } diff --git a/arch/powerpc/kvm/e500mc.c b/arch/powerpc/kvm/e500mc.c index 19c8379..09da1ac 100644 --- a/arch/powerpc/kvm/e500mc.c +++ b/arch/powerpc/kvm/e500mc.c @@ -143,8 +143,6 @@ void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu) kvmppc_e500_tlbil_all(vcpu_e500); __get_cpu_var(last_vcpu_on_cpu) = vcpu; } - - kvmppc_load_guest_fp(vcpu); } void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu)