From: Manish Jaggi <mjaggi@caviumnetworks.com>
To: Julien Grall <julien.grall@arm.com>,
shankerd@codeaurora.org, xen-devel@lists.xen.org
Cc: Stefano Stabellini <sstabellini@kernel.org>,
Steve Capper <Steve.Capper@arm.com>,
Andre Przywara <andre.przywara@arm.com>,
Jiandi An <anjiandi@codeaurora.org>,
Punit Agrawal <punit.agrawal@arm.com>,
Sameer Goel <sgoel@codeaurora.org>,
nd@arm.com, Charles Garcia-Tobin <Charles.Garcia-Tobin@arm.com>
Subject: Re: xen/arm: Hiding SMMUs from Dom0 when using ACPI on Xen
Date: Thu, 8 Jun 2017 18:08:58 +0530 [thread overview]
Message-ID: <7ece64e1-a063-954f-d1e8-08c8d0cbb9e5@caviumnetworks.com> (raw)
In-Reply-To: <e7abc302-49a7-1521-82d5-56c13f1c375e@arm.com>
On 5/19/2017 1:39 AM, Julien Grall wrote:
>
>
> On 18/05/2017 21:02, Manish Jaggi wrote:
>> In the IORT table using the PCI-RC node, SMMU node and ITS node,
>> RID->StreamID->Device-ID mapping can be generated.
>> As per IORT spec toady, same RID can be mapped to different StreamIDs
>> using two ID Array elements with same RID range but different output
>> reference.
>> There exists no use case for such a scenario hence a clarification is
>> required in IORT spec which states that RID range cannot overlap in the
>> ID array.
>
> I understand that.
>
>>
>> with this clarification in place, it is straight-forward to map RID to a
>> device-ID by replacing output of SMMU to output of RCI-RC
>
> I am not sure to follow your suggestion here. But I will wait a patch
> before commenting.
>
Please see [RFC] [PATCH] arm-acpi: Hide SMMU from IORT for hardware domain
> Cheers,
>
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prev parent reply other threads:[~2017-06-08 12:38 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-02-22 14:10 xen/arm: Hiding SMMUs from Dom0 when using ACPI on Xen Julien Grall
2017-02-27 13:23 ` Vijay Kilari
2017-02-27 14:12 ` Julien Grall
2017-02-27 16:58 ` Shanker Donthineni
2017-02-27 18:12 ` Julien Grall
2017-05-18 11:59 ` Manish Jaggi
2017-05-18 14:57 ` Julien Grall
2017-05-18 20:02 ` Manish Jaggi
2017-05-18 20:09 ` Julien Grall
2017-06-08 12:38 ` Manish Jaggi [this message]
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