From: Jan Beulich <jbeulich@suse.com>
To: Andrew Cooper <andrew.cooper3@citrix.com>
Cc: "Roger Pau Monné" <roger@xenproject.org>,
"Teddy Astie" <teddy.astie@vates.tech>,
Xen-devel <xen-devel@lists.xenproject.org>
Subject: Re: [PATCH] x86/amd: Expand comment about NullSelectorClearsBase
Date: Fri, 21 Aug 2026 10:51:21 +0200 [thread overview]
Message-ID: <79a5b821-e2c9-4e64-b2cf-1f839e2037d0@suse.com> (raw)
In-Reply-To: <20260820172640.2072049-1-andrew.cooper3@citrix.com>
On 20.08.2026 19:26, Andrew Cooper wrote:
> Rework detect_zen2_null_seg_behaviour() to use the new MSR infrastructure.
>
> Zen2 doesn't have WRMSRNS so don't bother relaxing the write. All it will do
> is insert a useless alternative.
>
> No functional change.
>
> Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
> Naming Zen2/3 in init_hygon() isn't ideal, but the early hygons really were
> not far removed from the AMD microarchitectures.
I wonder what we should do about Hygon. Just recently I saw patches going into
somewhere (gcc?) to support recent hardware. We haven't seen any contributions
in many years to keep our support up-to-date. We may want/need to consider
removing support if that code is effectively unmaintained.
Jan
prev parent reply other threads:[~2026-08-21 8:51 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-08-20 17:26 [PATCH] x86/amd: Expand comment about NullSelectorClearsBase Andrew Cooper
2026-08-21 8:51 ` Jan Beulich [this message]
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