Re: [PATCH v24 00/10] Add ARMv8 RAS virtualization support in QEMU

[Peter Maydell]

On Mon, 17 Feb 2020 at 13:10, Dongjiu Geng <address@hidden> wrote:
>
> In the ARMv8 platform, the CPU error types includes synchronous external 
> abort(SEA) and SError Interrupt (SEI). If exception happens in guest, host 
> does not know the detailed information of guest, so it is expected that guest 
> can do the recovery.
> For example, if an exception happens in a guest user-space application, host 
> does
> not know which application encounters errors, only guest knows it.
>
> 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 
> GHES
> buffer and inject an exception or IRQ to 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 have reviewed the remaining arm bit of this series (patch 9),
and made some comments on patch 1. Still to be reviewed are
patches 4, 5, 6, 8: I'm going to assume that Michael or Igor
will look at those.

thanks
-- PMM