From mboxrd@z Thu Jan 1 00:00:00 1970 From: Scott Wood Date: Tue, 07 May 2013 23:40:43 +0000 Subject: Re: [v1][KVM][PATCH 1/1] kvm:ppc:booehv: direct ISI exception to Guest Message-Id: <1367970043.3398.39@snotra> List-Id: References: <1367924791-24394-1-git-send-email-tiejun.chen@windriver.com> 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) MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Tiejun Chen Cc: agraf@suse.de, kvm-ppc@vger.kernel.org, kvm@vger.kernel.org, linuxppc-dev@lists.ozlabs.org On 05/07/2013 06:06:30 AM, Tiejun Chen wrote: > We also can direct ISI exception to Guest like DSI. > > 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 interfere somewhat with using the VF bit, if we were to ever do so, since VF only affects data accesses (and so the guest would see an ISI storm rather than a machine check if it tries to execute from such an address). -Scott 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= From mboxrd@z Thu Jan 1 00:00:00 1970 From: Scott Wood Subject: Re: [v1][KVM][PATCH 1/1] kvm:ppc:booehv: direct ISI exception to Guest Date: Tue, 7 May 2013 18:40:43 -0500 Message-ID: <1367970043.3398.39@snotra> References: <1367924791-24394-1-git-send-email-tiejun.chen@windriver.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; delsp=Yes; format=Flowed Content-Transfer-Encoding: 8BIT Cc: , , , To: Tiejun Chen Return-path: 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) Content-Disposition: inline Sender: kvm-ppc-owner@vger.kernel.org List-Id: kvm.vger.kernel.org On 05/07/2013 06:06:30 AM, Tiejun Chen wrote: > We also can direct ISI exception to Guest like DSI. > > 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 interfere somewhat with using the VF bit, if we were to ever do so, since VF only affects data accesses (and so the guest would see an ISI storm rather than a machine check if it tries to execute from such an address). -Scott