[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [PATCH] xen/arm: vtimer: Don't read/use the secure physical timer interrupt for ACPI
- To: Julien Grall <julien@xxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- From: Michal Orzel <michal.orzel@xxxxxxx>
- Date: Thu, 5 Oct 2023 22:15:38 +0200
- Arc-authentication-results: i=1; mx.microsoft.com 1; spf=pass (sender ip is 165.204.84.17) smtp.rcpttodomain=xen.org smtp.mailfrom=amd.com; dmarc=pass (p=quarantine sp=quarantine pct=100) action=none header.from=amd.com; dkim=none (message not signed); arc=none
- Arc-message-signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=bFWJtjr1R4ZmXhaAM0FGC4gDS8Tum3//rC6Eut+RLyw=; b=WDKkUyv/5PR7KYt0bELCiInUVenlwGplEYRF6Us7p+dxmb7vt/T6eGzq5HbNuPBo150eQgA/mxipoZkEJ92FFH8PEwMWUaBE3AxU51oUm5+WqsksMS84Uy5tdlaNBjjvdT3ejhsO1qNdVttRaTMO0DnZl1ISNasBpcZjZ8dUQkfD3y8xfZjTMGI5nsYObHo6wjszQiQ2KRtRqqozmeI+GBM0tYtF/xDqn5YCu28uFGr6+EZubxFXbAvnGGlZC54SIgOjrFR4a7YpIYt53ixMxzG/0GMx7ALk24x3ARuCbwA5IfXjDSrbfL7rxhqX3ckSFU837Ko3ESo+cUORUOGkyA==
- Arc-seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=PtKWOtOOnEJpzA7agCnMpXdsR75gH3aF9H8ZAYh0f3/gkeE7b673Nu1YvTBRL8Jgekd384pnC0QwExRvw2SXJbz3/u8cD+gkUMFN0c6YzQriM+RqYapkhEysF18Oi6L2eApEVXSYtNUIlWUWXbGDiqU0CyJxjsE/V1Yv2iPoPZ0P8uWffFLTbX/NF5RpH20+8TrfhhKY0GjN6VuFEzIxZPLWh0UmkwOB90jzzkEzjK+Fdsu96dU0mOXZaR8KJM6tSyJpKrVl3Vy6v1vN3o97on4O/33ZGFQjuoSWtrX5z0Tyvg/UEa7UF7nmAARxDILgQs6JRgeZiaM24bqexgGh0A==
- Cc: <Henry.Wang@xxxxxxx>, <dan.driscoll@xxxxxxxxxxx>, <arvind.raghuraman@xxxxxxxxxxx>, Julien Grall <jgrall@xxxxxxxxxx>, "Stefano Stabellini" <sstabellini@xxxxxxxxxx>, Bertrand Marquis <bertrand.marquis@xxxxxxx>, Volodymyr Babchuk <Volodymyr_Babchuk@xxxxxxxx>
- Delivery-date: Thu, 05 Oct 2023 20:16:10 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
Hi Julien,
On 05/10/2023 18:54, Julien Grall wrote:
>
>
> From: Julien Grall <jgrall@xxxxxxxxxx>
>
> Per ACPI 6.5 section 5.2.25 ("Generic Timer Description Table (GTDT)"),
> the fields "Secure EL1 Timer GSIV/Flags" are optional and an OS running
> in non-secure world is meant to ignore the values.
>
> However, Xen is trying to reserve the value. When booting on Graviton
> 2 metal instances, this would result to crash a boot because the
> value is 0 which is already reserved (I haven't checked for which device).
Per my understanding it is not reserved by any device.
0 means SGI and for SGIs we pre-reserve the bits in allocated_irqs at the very
start.
~Michal
|
