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: 256620 Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from ozlabs.org (localhost [IPv6:::1]) by ozlabs.org (Postfix) with ESMTP id 6B4962C0823 for ; Wed, 3 Jul 2013 22:45:56 +1000 (EST) Received: from co1outboundpool.messaging.microsoft.com (co1ehsobe003.messaging.microsoft.com [216.32.180.186]) (using TLSv1 with cipher AES128-SHA (128/128 bits)) (Client CN "mail.global.frontbridge.com", Issuer "MSIT Machine Auth CA 2" (not verified)) by ozlabs.org (Postfix) with ESMTPS id 0CF8C2C0302 for ; Wed, 3 Jul 2013 22:44:14 +1000 (EST) 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: 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 Cc: Mihai Caraman , linuxppc-dev@lists.ozlabs.org, kvm@vger.kernel.org X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" 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)