Re: [Xen-devel] [PATCH] VT-d: improve RMRR validity checking

[Keir Fraser <keir.fraser@xxxxxxxxxxxxx>]

Given Weidong's comments I will drop these patches and wait for a re-send,
plus Acks from Weidong.

 -- Keir

On 21/01/2010 08:25, "Noboru Iwamatsu" <n_iwamatsu@xxxxxxxxxxxxxx> wrote:

> Hi,
> 
> Some Q35 mainboard that has buggy BIOS, I have one of this,
> reports invalid DRHD in addition to the invalid RMRR.
> 
> Attached patch fixes this DRHD issue in the same way as RMRR.
> And also, I fixed RMRR validity checking loop.
> 
> Noboru.
> 
> Signed-off-by: Noboru Iwamatsu <n_iwamatsu@xxxxxxxxxxxxxx>
> 
> 
> -------- Original Message  --------
> Subject: [Xen-devel] [PATCH] VT-d: improve RMRR validity checking
> From: Han, Weidong <weidong.han@xxxxxxxxx>
> To: xen-devel@xxxxxxxxxxxxxxxxxxx <xen-devel@xxxxxxxxxxxxxxxxxxx>
> Date: Thu Jan 21 2010 11:46:12 GMT+0900
> 
>> Currently, Xen checks RMRR range and disables VT-d if RMRR range is set
>> incorrectly in BIOS rigorously. But, actually we can ignore the RMRR if the
>> device under its scope are not pci discoverable, because the RMRR won't be
>> used by non-existed or disabled devices.
>> 
>> This patch ignores the RMRR if the device under its scope are not pci
>> discoverable, and only checks the validity of RMRRs that are actually used.
>> In order to avoid duplicate pci device detection code, this patch defines a
>> function pci_device_detect for it.
>> 
>> Signed-off-by: Weidong Han<weidong.han@xxxxxxxxx>
>> 
>> 
>> 
>> _______________________________________________
>> Xen-devel mailing list
>> Xen-devel@xxxxxxxxxxxxxxxxxxx
>> http://lists.xensource.com/xen-devel
> 



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