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Re: [PATCH] arm/gicv3: Detect normal NC ITS command queues
- To: Mykola Kvach <xakep.amatop@xxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- From: "Orzel, Michal" <michal.orzel@xxxxxxx>
- Date: Mon, 18 May 2026 06:43:30 +0200
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- Cc: Mykola Kvach <mykola_kvach@xxxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Julien Grall <julien@xxxxxxx>, Bertrand Marquis <bertrand.marquis@xxxxxxx>, Volodymyr Babchuk <Volodymyr_Babchuk@xxxxxxxx>
- Delivery-date: Mon, 18 May 2026 04:43:44 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 15-May-26 11:40, Mykola Kvach wrote:
> From: Mykola Kvach <mykola_kvach@xxxxxxxx>
>
> GITS_CBASER.InnerCache uses the GIC BASER cacheability encoding.
> Both 0b000 (Device-nGnRnE) and 0b001 (Normal Inner
> Non-cacheable) describe non-cacheable accesses to the command queue.
>
> its_map_cbaser() only checked whether the shifted field was zero,
> so an ITS that reports Normal Inner Non-cacheable would not set
> HOST_ITS_FLUSH_CMD_QUEUE. Decode the field before comparing it with
> the unshifted enum value, matching the handling of ITS BASER tables
> and GICR_PROPBASER.
>
> Fixes: 8ed8d21373be ("ARM: GICv3 ITS: map ITS command buffer")
> Signed-off-by: Mykola Kvach <mykola_kvach@xxxxxxxx>
Reviewed-by: Michal Orzel <michal.orzel@xxxxxxx>
~Michal
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