From: Andrew Cooper <andrew.cooper3@citrix.com>
To: Roger Pau Monne <roger.pau@citrix.com>, xen-devel@lists.xenproject.org
Cc: Henry Wang <Henry.Wang@arm.com>, Jan Beulich <jbeulich@suse.com>,
Kevin Tian <kevin.tian@intel.com>
Subject: Re: [PATCH for-4.18 v2] iommu/vt-d: fix SAGAW capability parsing
Date: Wed, 18 Oct 2023 18:04:29 +0100 [thread overview]
Message-ID: <0237931f-dd15-43eb-9751-171615a005bb@citrix.com> (raw)
In-Reply-To: <20231018160733.24655-1-roger.pau@citrix.com>
On 18/10/2023 5:07 pm, Roger Pau Monne wrote:
> Enabling 5 level paging support (AGAW 3) at this point in the release is too
> risky,
This comment will go stale extremely quickly.
"It is too late in the Xen 4.18 release to enable support for 5 level
paging, ..."
~Andrew
> so instead put a bodge to unconditionally disable passthough mode if
> SAGAW has any bits greater than 2 set. Ignore bit 0, it's reserved in the
> specification but unlikely to have any meaning in the future.
next prev parent reply other threads:[~2023-10-18 17:04 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-10-18 16:07 [PATCH for-4.18 v2] iommu/vt-d: fix SAGAW capability parsing Roger Pau Monne
2023-10-18 17:04 ` Andrew Cooper [this message]
2023-10-19 7:17 ` Roger Pau Monné
2023-10-19 7:41 ` Jan Beulich
2023-10-19 8:15 ` Roger Pau Monné
2023-10-19 8:49 ` Jan Beulich
2023-10-19 9:46 ` Roger Pau Monné
2023-10-19 10:21 ` Henry Wang
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