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Re: [RESEND PATCH v21 0/6] Add ARMv8 RAS virtualization support in QEMU

From: Peter Maydell
Subject: Re: [RESEND PATCH v21 0/6] Add ARMv8 RAS virtualization support in QEMU
Date: Mon, 2 Dec 2019 18:27:40 +0000

On Mon, 11 Nov 2019 at 01:44, Xiang Zheng <address@hidden> wrote:
> In the ARMv8 platform, the CPU error types are synchronous external abort(SEA)
> and SError Interrupt (SEI). If exception happens in guest, sometimes it's 
> better
> for guest to perform the recovery, because host does not know the detailed
> information of guest. For example, if an exception happens in a user-space
> application within guest, host does not know which application encounters
> errors.
> For the ARMv8 SEA/SEI, KVM or host kernel delivers SIGBUS to notify userspace.
> After user space gets the notification, it will record the CPER into guest 
> buffer and inject an exception or IRQ into guest.
> In the current implementation, if the type of SIGBUS is BUS_MCEERR_AR, we will
> treat it as a synchronous exception, and notify guest with ARMv8 SEA
> notification type after recording CPER into guest.

Hi; I've given you reviewed-by tags on a couple of patches; other
people have given review comments on some of the other patches,
so I think you have enough to do a v22 addressing those.

-- PMM

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