From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from db8outboundpool.messaging.microsoft.com (mail-db8lp0189.outbound.messaging.microsoft.com [213.199.154.189]) (using TLSv1 with cipher AES128-SHA (128/128 bits)) (Client CN "mail.global.frontbridge.com", Issuer "Microsoft Secure Server Authority" (not verified)) by ozlabs.org (Postfix) with ESMTPS id CC67B2C0171 for ; Wed, 8 May 2013 09:40:56 +1000 (EST) Date: Tue, 7 May 2013 18:40:43 -0500 From: Scott Wood Subject: Re: [v1][KVM][PATCH 1/1] kvm:ppc:booehv: direct ISI exception to Guest To: Tiejun Chen In-Reply-To: <1367924791-24394-1-git-send-email-tiejun.chen@windriver.com> (from tiejun.chen@windriver.com on Tue May 7 06:06:30 2013) Message-ID: <1367970043.3398.39@snotra> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; delsp=Yes; format=Flowed Cc: linuxppc-dev@lists.ozlabs.org, agraf@suse.de, kvm-ppc@vger.kernel.org, kvm@vger.kernel.org List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , On 05/07/2013 06:06:30 AM, Tiejun Chen wrote: > We also can direct ISI exception to Guest like DSI. >=20 > Signed-off-by: Tiejun Chen > --- > arch/powerpc/kvm/booke_emulate.c | 3 +++ > arch/powerpc/kvm/e500mc.c | 3 ++- > 2 files changed, 5 insertions(+), 1 deletion(-) Are you seeing a real performance improvement from this? This will =20 interfere somewhat with using the VF bit, if we were to ever do so, =20 since VF only affects data accesses (and so the guest would see an ISI =20 storm rather than a machine check if it tries to execute from such an =20 address). -Scott=