From mboxrd@z Thu Jan 1 00:00:00 1970 From: Aravinda Prasad Subject: Re: [PATCH] KVM: PPC: Exit guest upon fatal machine check exception Date: Fri, 13 Nov 2015 10:28:52 +0530 Message-ID: <56456E0C.1040909@linux.vnet.ibm.com> References: <20151111165845.3721.98296.stgit@aravindap> <876118ymy4.fsf@gamma.ozlabs.ibm.com> <20151112033816.GJ5852@voom.redhat.com> <87bnazizkp.fsf@gamma.ozlabs.ibm.com> <5644CABE.3010905@linux.vnet.ibm.com> <87pozezypm.fsf@gamma.ozlabs.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Cc: David Gibson , kvm@vger.kernel.org, michaele@au1.ibm.com, mahesh@linux.vnet.ibm.com, agraf@suse.de, kvm-ppc@vger.kernel.org, linuxppc-dev@ozlabs.org To: Daniel Axtens Return-path: Received: from e18.ny.us.ibm.com ([129.33.205.208]:36691 "EHLO e18.ny.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932750AbbKME7F (ORCPT ); Thu, 12 Nov 2015 23:59:05 -0500 Received: from localhost by e18.ny.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Thu, 12 Nov 2015 23:59:04 -0500 In-Reply-To: <87pozezypm.fsf@gamma.ozlabs.ibm.com> Sender: kvm-owner@vger.kernel.org List-ID: On Friday 13 November 2015 03:07 AM, Daniel Axtens wrote: > Aravinda Prasad writes: > >>> Yeah, it would be good not to break this. >> >> I am not familiar with CAPI. Does this affect CAPI? > > When a CAPI card experiences an EEH event, any cache lines it holds are > filled with SUEs (Special UEs, interpreted by the kernel the same as > regular UEs). When these are read, we get an MCE. Currently CAPI does > not support virtualisation, but that is actively being worked > on. There's a _very_ good chance it will then be backported to various > distros, which could have old qemu. > > Therefore, I'd ideally like to make sure UEs in KVM guests work properly > and continue to do so in all combinations of kernel and qemu. I'm > following up the email from Mahesh that you linked: I'm not sure I quite > follow his logic so I'll try to make sense of that and then get back to > you. sure. Thanks. Regards, Aravinda > > Regards, > Daniel > -- Regards, Aravinda From mboxrd@z Thu Jan 1 00:00:00 1970 From: Aravinda Prasad Date: Fri, 13 Nov 2015 04:59:09 +0000 Subject: Re: [PATCH] KVM: PPC: Exit guest upon fatal machine check exception Message-Id: <56456E0C.1040909@linux.vnet.ibm.com> List-Id: References: <20151111165845.3721.98296.stgit@aravindap> <876118ymy4.fsf@gamma.ozlabs.ibm.com> <20151112033816.GJ5852@voom.redhat.com> <87bnazizkp.fsf@gamma.ozlabs.ibm.com> <5644CABE.3010905@linux.vnet.ibm.com> <87pozezypm.fsf@gamma.ozlabs.ibm.com> In-Reply-To: <87pozezypm.fsf@gamma.ozlabs.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Daniel Axtens Cc: David Gibson , kvm@vger.kernel.org, michaele@au1.ibm.com, mahesh@linux.vnet.ibm.com, agraf@suse.de, kvm-ppc@vger.kernel.org, linuxppc-dev@ozlabs.org On Friday 13 November 2015 03:07 AM, Daniel Axtens wrote: > Aravinda Prasad writes: > >>> Yeah, it would be good not to break this. >> >> I am not familiar with CAPI. Does this affect CAPI? > > When a CAPI card experiences an EEH event, any cache lines it holds are > filled with SUEs (Special UEs, interpreted by the kernel the same as > regular UEs). When these are read, we get an MCE. Currently CAPI does > not support virtualisation, but that is actively being worked > on. There's a _very_ good chance it will then be backported to various > distros, which could have old qemu. > > Therefore, I'd ideally like to make sure UEs in KVM guests work properly > and continue to do so in all combinations of kernel and qemu. I'm > following up the email from Mahesh that you linked: I'm not sure I quite > follow his logic so I'll try to make sense of that and then get back to > you. sure. Thanks. Regards, Aravinda > > Regards, > Daniel > -- Regards, Aravinda