From: Waiman Long <longman@redhat.com>
To: Boris Petkov <bp@alien8.de>, Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>, "H. Peter Anvin" <hpa@zytor.com>,
x86@kernel.org, linux-kernel@vger.kernel.org,
Josh Poimboeuf <jpoimboe@redhat.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Pawan Gupta <pawan.kumar.gupta@linux.intel.com>,
Mark Gross <mgross@linux.intel.com>,
Tony Luck <tony.luck@intel.com>
Subject: Re: [PATCH v2 1/2] x86/speculation: Fix incorrect MDS/TAA mitigation status
Date: Sun, 17 Nov 2019 20:17:26 -0500 [thread overview]
Message-ID: <2fd3212a-915e-85cd-4be9-eb08b573382e@redhat.com> (raw)
In-Reply-To: <C365EA60-3A23-4C39-B21C-2CBC0B450E3C@alien8.de>
On 11/15/19 3:21 PM, Boris Petkov wrote:
> On November 15, 2019 8:35:54 PM GMT+01:00, Thomas Gleixner <tglx@linutronix.de> wrote:
>> See the last sentence of the paragraph you replied to :)
> Proves even more that this should be documented in *all* places that talk about TAA cmdline options and we should not rely on references but write stuff out everywhere so that people can see it directly.
>
>> But serioulsy, yes we should mention the interaction in
>> kernel-parameters.txt as well. Something like:
>>
>> off - Unconditionally disable MDS mitigation.
>> + On TAA affected machines, mds=off can be prevented
>> + by an active TAA mitigation as both vulnerabilities
>> + are mitigated with the same mechanism.
>>
>> and the other way round for TAA.
> Ack.
>
Sorry for late reply as I am out on Friday afternoon. On hindsight, I
should have added relevant description to kernel-parameters.txt as it is
the mostly read kernel document.
Acked-by: Waiman Long <longman@redhat.com>
Thanks,
Longman
next prev parent reply other threads:[~2019-11-18 1:17 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-15 16:14 [PATCH v2 0/2] " Waiman Long
2019-11-15 16:14 ` [PATCH v2 1/2] " Waiman Long
2019-11-15 17:09 ` Boris Petkov
2019-11-15 19:35 ` Thomas Gleixner
2019-11-15 20:21 ` Boris Petkov
2019-11-18 1:17 ` Waiman Long [this message]
2019-11-16 12:25 ` [tip: x86/pti] " tip-bot2 for Waiman Long
2019-11-15 16:14 ` [PATCH v2 2/2] x86/speculation: Fix redundant MDS mitigation message Waiman Long
2019-11-16 12:25 ` [tip: x86/pti] " tip-bot2 for Waiman Long
2019-11-16 14:24 ` Borislav Petkov
2019-11-18 1:22 ` Waiman Long
2019-11-16 14:38 ` tip-bot2 for Waiman Long
2019-11-15 16:17 ` [PATCH v2 0/2] x86/speculation: Fix incorrect MDS/TAA mitigation status Waiman Long
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