From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail137.messagelabs.com (mail137.messagelabs.com [216.82.249.19]) by kanga.kvack.org (Postfix) with SMTP id A11E36B006A for ; Thu, 21 Jan 2010 03:56:50 -0500 (EST) Message-ID: <4B5816B6.9090607@redhat.com> Date: Thu, 21 Jan 2010 10:56:22 +0200 From: Avi Kivity MIME-Version: 1.0 Subject: Re: [PATCH v3 04/12] Add "handle page fault" PV helper. References: <1262700774-1808-5-git-send-email-gleb@redhat.com> <1263490267.4244.340.camel@laptop> <20100117144411.GI31692@redhat.com> <4B541D08.9040802@zytor.com> <20100118085022.GA30698@redhat.com> <4B5510B1.9010202@zytor.com> <20100119065537.GF14345@redhat.com> <4B55E5D8.1070402@zytor.com> <20100119174438.GA19450@redhat.com> <4B5611A9.4050301@zytor.com> <20100120100254.GC5238@redhat.com> <4B56F040.1080703@redhat.com> <4B573AEF.9010007@redhat.com> In-Reply-To: <4B573AEF.9010007@redhat.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org To: Rik van Riel Cc: Gleb Natapov , "H. Peter Anvin" , Peter Zijlstra , kvm@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, mingo@elte.hu, tglx@linutronix.de, cl@linux-foundation.org List-ID: On 01/20/2010 07:18 PM, Rik van Riel wrote: > On 01/20/2010 07:00 AM, Avi Kivity wrote: >> On 01/20/2010 12:02 PM, Gleb Natapov wrote: >>> >>> I can inject the event as HW interrupt on vector greater then 32 but >>> not >>> go through APIC so EOI will not be required. This sounds >>> non-architectural >>> and I am not sure kernel has entry point code for this kind of >>> event, it >>> has one for exception and one for interrupts that goes through >>> __do_IRQ() >>> which assumes that interrupts should be ACKed. >> >> Further, we start to interact with the TPR; Linux doesn't use the TPR or >> cr8 but if it does one day we don't want it interfering with apf. > > That's not an issue is it? The guest will tell the host what > vector to use for pseudo page faults. And kill 15 other vectors? -- error compiling committee.c: too many arguments to function -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org