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Re: [PATCH] arm/vgic-v3: Fix GICD_ICPENDR read access in __vgic_v3_distr_common_mmio_read()
- To: Oleksandr Tyshchenko <Oleksandr_Tyshchenko@xxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- From: "Orzel, Michal" <michal.orzel@xxxxxxx>
- Date: Tue, 27 May 2025 08:48:52 +0200
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- Cc: Stefano Stabellini <sstabellini@xxxxxxxxxx>, Julien Grall <julien@xxxxxxx>, Bertrand Marquis <bertrand.marquis@xxxxxxx>, Volodymyr Babchuk <Volodymyr_Babchuk@xxxxxxxx>
- Delivery-date: Tue, 27 May 2025 06:49:31 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 27/05/2025 02:11, Oleksandr Tyshchenko wrote:
> An attempt to read access the GICD_ICPENDR<n> register (where n > 0)
> which should be RAZ (as not supported) causes the guest data abort
> due to incorrect end offset (GICD_ICPENDR) in the case range.
> Fix that by using the proper end offset (GICD_ICPENDRN).
>
> Fixes: a2b83f95bfa ("xen/arm: vgic: Properly emulate the full register")
> Signed-off-by: Oleksandr Tyshchenko <oleksandr_tyshchenko@xxxxxxxx>
Reviewed-by: Michal Orzel <michal.orzel@xxxxxxx>
~Michal
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