019 16:42
>>>> To: xen-devel@lists.xenproject.org
>>>> Cc: Juergen Gross ; Sander Eikelenboom
>>>> ; Andrew Cooper
>>>> Subject: [Xen-devel] [PATCH v2 0/2] AMD/IOMMU: re-work mode updating
>>>>
>>>> update_paging_mode() in the
> -Original Message-
> From: Jan Beulich
> Sent: 15 November 2019 09:29
> To: Durrant, Paul
> Cc: xen-devel@lists.xenproject.org; Andrew Cooper
> ; Sander Eikelenboom ;
> Juergen Gross
> Subject: Re: [Xen-devel] [PATCH v2 0/2] AMD/IOMMU: re-work mode updating
On 14.11.2019 18:29, Durrant, Paul wrote:
>> -Original Message-
>> From: Xen-devel On Behalf Of Jan
>> Beulich
>> Sent: 14 November 2019 16:42
>> To: xen-devel@lists.xenproject.org
>> Cc: Juergen Gross ; Sander Eikelenboom
>> ; Andrew Cooper
> -Original Message-
> From: Xen-devel On Behalf Of Jan
> Beulich
> Sent: 14 November 2019 16:42
> To: xen-devel@lists.xenproject.org
> Cc: Juergen Gross ; Sander Eikelenboom
> ; Andrew Cooper
> Subject: [Xen-devel] [PATCH v2 0/2] AMD/IOMMU: re-work mode updating
update_paging_mode() in the AMD IOMMU code expects to be invoked with
the PCI devices lock held. The check occurring only when the mode
actually needs updating, the violation of this rule by the majority
of callers did go unnoticed until per-domain IOMMU setup was changed
to do away with on-demand
