From: Julien Grall <julien.grall@arm.com>
To: Shanker Donthineni <shankerd@codeaurora.org>,
xen-devel <xen-devel@lists.xensource.com>
Cc: Philip Elcan <pelcan@codeaurora.org>,
Stefano Stabellini <sstabellini@kernel.org>,
Vikram Sethi <vikrams@codeaurora.org>
Subject: Re: [PATCH v2] arm/gic-v3: Fix ACPI probe fail on GICv4 hardware
Date: Fri, 27 May 2016 16:10:31 +0100 [thread overview]
Message-ID: <57486367.4090105@arm.com> (raw)
In-Reply-To: <1464361256-28713-1-git-send-email-shankerd@codeaurora.org>
Hello Shanker,
On 27/05/16 16:00, Shanker Donthineni wrote:
> The current driver ACPI probe fails on hardware which has GICv4
> version, even though it is fully compatible to GICv3. This patch
> fixes the issue by registering the same probe function for GICv4
> hardware.
>
> Signed-off-by: Shanker Donthineni <shankerd@codeaurora.org>
> ---
> Changes since v1:
> - Edit commit text.
> - Fix BUG() in xen/arch/arm/domain.c
Please see my latest comment on the previous version [1].
To go further, the ACPI tables may not represent the actual hardware. It
is possible to have ACPI tables describing a GICv2 whilst the real
hardware is a GICv3.
Xen will use the GICv2 driver and not the GICv3. So the helper will
return GIC_V2 (and not GIC_V3).
Regards,
[1] https://www.mail-archive.com/xen-devel@lists.xen.org/msg69273.html
--
Julien Grall
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next prev parent reply other threads:[~2016-05-27 15:10 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-05-27 15:00 [PATCH v2] arm/gic-v3: Fix ACPI probe fail on GICv4 hardware Shanker Donthineni
2016-05-27 15:10 ` Julien Grall [this message]
2016-05-27 15:30 ` Shanker Donthineni
2016-05-27 16:10 ` Julien Grall
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