Re: [PATCH v27 00/10] Add ARMv8 RAS virtualization support in QEMU

[Peter Maydell]

On Tue, 12 May 2020 at 04:03, 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.



Applied to target-arm.next, thanks.

-- PMM