From: Dave Hansen <dave.hansen@intel.com>
To: Borislav Petkov <bp@alien8.de>,
Matthias Welwarsky <matthias.welwarsky@sysgo.com>,
Dave Hansen <dave.hansen@linux.intel.com>
Cc: linux-kernel@vger.kernel.org, x86-ml <x86@kernel.org>
Subject: Re: x86, possible bug in __memmove() alternatives patching
Date: Fri, 25 Mar 2022 21:45:24 -0700 [thread overview]
Message-ID: <d9d0405e-b118-b028-d26f-fbb8de4e7a0e@intel.com> (raw)
In-Reply-To: <Yj49F1pnehy3ga5U@zn.tnic>
On 3/25/22 15:07, Borislav Petkov wrote:
> I know it's is probably a very rare case and Intel recommends having fast
> string ops enabled, hence the question: would this be considered a bug in the
> kernel that should be fixed? A potential fix could be to clear FSRM together
> with ERMS depending on IA32_MISC_ENABLE.
I'd consider it a bug in the hypervisor, personally. ;)
But, we do try to make the kernel work even the face of funky
hypervisors that do things that never occur on real hardware. If a nice
patch to fix this up showed up, I'd definitely take a look.
next prev parent reply other threads:[~2022-03-26 4:49 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-25 8:51 x86, possible bug in __memmove() alternatives patching Matthias Welwarsky
2022-03-25 22:07 ` Borislav Petkov
2022-03-26 4:45 ` Dave Hansen [this message]
2022-03-26 8:27 ` Borislav Petkov
2022-03-29 22:34 ` Dave Hansen
2022-03-26 11:39 ` Matthias Welwarsky
2022-03-29 22:33 ` Dave Hansen
2022-03-30 13:56 ` Matthias Welwarsky
2022-03-30 14:44 ` Dave Hansen
2022-03-30 14:54 ` Borislav Petkov
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