Subject: Re: [PATCH v3 2/2] KVM: arm/arm64: Allow user injection of external data aborts

From: Alexander Graf <[email-masked]>
Date: Mon, 21 Oct 2019 22:21:09 +0200

On 11.10.19 13:07, Christoffer Dall wrote:
> In some scenarios, such as buggy guest or incorrect configuration of the
> VMM and firmware description data, userspace will detect a memory access
> to a portion of the IPA, which is not mapped to any MMIO region.
> 
> For this purpose, the appropriate action is to inject an external abort
> to the guest.  The kernel already has functionality to inject an
> external abort, but we need to wire up a signal from user space that
> lets user space tell the kernel to do this.
> 
> It turns out, we already have the set event functionality which we can
> perfectly reuse for this.
> 
> Signed-off-by: Christoffer Dall <[email-masked]>

Reviewed-by: Alexander Graf <[email-masked]>

Alex

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