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Re: [Qemu-arm] [PATCH v3 1/3] arm64: kvm: support kvmtool to detect RAS
From: |
James Morse |
Subject: |
Re: [Qemu-arm] [PATCH v3 1/3] arm64: kvm: support kvmtool to detect RAS extension feature |
Date: |
Thu, 04 May 2017 09:19:23 +0100 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Icedove/31.6.0 |
Hi Paolo,
On 02/05/17 16:48, Paolo Bonzini wrote:
> On 02/05/2017 09:56, Christoffer Dall wrote:
>> The subject and description of these patches are also misleading.
>> Hopefully this is in no way tied to kvmtool, but to userspace
>> generically, for example also to be used by QEMU?
>
> Yes, QEMU already has a similar capability on x86.
>
> Does ARM support background scrubbing of memory to detect errors?
As part of RAS support, yes. A way for firmware to notify the OS about these
events was recently added to the ACPI specification.
We are aiming to turn on ARCH_SUPPORTS_MEMORY_FAILURE which does the Linux end
of things. Punit has a series here:
https://www.spinics.net/lists/arm-kernel/msg575944.html
> If
> so, are there any plans to support action-optional SIGBUS on ARM?
It looks like ARCH_SUPPORTS_MEMORY_FAILURE will bring that in, so yes.
Thanks,
James