From: Thomas Huth <thuth@redhat.com>
To: Aravinda Prasad <aravinda@linux.vnet.ibm.com>,
David Gibson <david@gibson.dropbear.id.au>
Cc: 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,
Daniel Axtens <dja@axtens.net>
Subject: Re: [PATCH] KVM: PPC: Exit guest upon fatal machine check exception
Date: Fri, 13 Nov 2015 08:38:08 +0100 [thread overview]
Message-ID: <56459360.3090400@redhat.com> (raw)
In-Reply-To: <5645828E.1030609@linux.vnet.ibm.com>
On 13/11/15 07:26, Aravinda Prasad wrote:
>
> On Friday 13 November 2015 07:20 AM, David Gibson wrote:
>> On Thu, Nov 12, 2015 at 11:22:29PM +0530, Aravinda Prasad wrote:
[...]
>>> So thinking whether qemu should explicitly enable the new NMI
>>> behavior.
>>
>> So, I think the reasoning above tends towards having qemu control the
>> MC behaviour. If qemu does nothing, MCs are delivered direct to
>> 0x200, if it enables the new handling, they cause a KVM exit and qemu
>> will deliver the MC.
>
> This essentially requires qemu to control how KVM behaves as KVM does
> the actual redirection of MC either to guest's 0x200 vector or to exit
> guest. So, if we are running new qemu, then KVM should exit guest and if
> we are running old qemu, KVM should redirect MC to 0x200. Is there any
> way to communicate this to KVM? ioctl?
Simply introduce a KVM capability that can be enabled by userspace.
See kvm_vcpu_ioctl_enable_cap() in arch/powerpc/kvm/powerpc.c.
Thomas
next prev parent reply other threads:[~2015-11-13 7:38 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-11-11 16:58 [PATCH] KVM: PPC: Exit guest upon fatal machine check exception Aravinda Prasad
2015-11-12 2:24 ` Daniel Axtens
2015-11-12 3:38 ` David Gibson
2015-11-12 4:32 ` Aravinda Prasad
2015-11-12 4:43 ` David Gibson
2015-11-12 17:52 ` Aravinda Prasad
2015-11-13 1:50 ` David Gibson
2015-11-13 6:26 ` Aravinda Prasad
2015-11-13 7:38 ` Thomas Huth [this message]
2015-11-13 11:25 ` Aravinda Prasad
2015-11-12 4:58 ` Daniel Axtens
2015-11-12 17:22 ` Aravinda Prasad
2015-11-12 21:37 ` Daniel Axtens
2015-11-13 4:58 ` Aravinda Prasad
2015-11-12 3:34 ` David Gibson
2015-11-12 5:18 ` Aravinda Prasad
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