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From: Paul Durrant <xadimgnik@gmail.com>
To: Jan Beulich <jbeulich@suse.com>,
	"xen-devel@lists.xenproject.org" <xen-devel@lists.xenproject.org>
Cc: Kevin Tian <kevin.tian@intel.com>
Subject: Re: [PATCH] VT-d: fix caching mode IOTLB flushing
Date: Thu, 19 Aug 2021 19:52:36 +0100	[thread overview]
Message-ID: <e4ff3535-e96e-0e65-1cc8-60cc75402186@xen.org> (raw)
In-Reply-To: <8b873e30-c1d1-3174-9e67-506887deedcc@suse.com>

On 19/08/2021 09:05, Jan Beulich wrote:
> While for context cache entry flushing use of did 0 is indeed correct
> (after all upon reading the context entry the IOMMU wouldn't know any
> domain ID if the entry is not present, and hence a surrogate one needs
> to be used), for IOTLB entries the normal domain ID (from the [present]
> context entry) gets used. See sub-section "IOTLB" of section "Address
> Translation Caches" in the VT-d spec.
> 
> Signed-off-by: Jan Beulich <jbeulich@suse.com>

Reviewed-by: Paul Durrant <paul@xen.org>


  reply	other threads:[~2021-08-19 18:52 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-19  8:05 [PATCH] VT-d: fix caching mode IOTLB flushing Jan Beulich
2021-08-19 18:52 ` Paul Durrant [this message]
2021-08-27  3:43 ` Tian, Kevin

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