From: Josh Poimboeuf <jpoimboe@kernel.org>
To: Borislav Petkov <bp@alien8.de>
Cc: Breno Leitao <leitao@debian.org>,
tglx@linutronix.de, Ingo Molnar <mingo@redhat.com>,
Dave Hansen <dave.hansen@linux.intel.com>,
x86@kernel.org, "H. Peter Anvin" <hpa@zytor.com>,
Peter Zijlstra <peterz@infradead.org>,
Pawan Gupta <pawan.kumar.gupta@linux.intel.com>,
leit@meta.com,
"open list:X86 ARCHITECTURE (32-BIT AND 64-BIT)"
<linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v4] x86/bugs: Add a separate config for each mitigation
Date: Wed, 11 Oct 2023 15:03:25 -0700 [thread overview]
Message-ID: <20231011220325.5uje4xnfxuccumm7@treble> (raw)
In-Reply-To: <20231011190317.GDZSbxdd5TuCIp5+JN@fat_crate.local>
On Wed, Oct 11, 2023 at 09:03:17PM +0200, Borislav Petkov wrote:
> On Tue, Oct 10, 2023 at 09:42:52PM -0700, Josh Poimboeuf wrote:
> > MITIGATION_PAGE_TABLE_ISOLATION
> > MITIGATION_RETPOLINE
> > MITIGATION_UNRET_ENTRY
> > MITIGATION_CALL_DEPTH_TRACKING
> > MITIGATION_IBPB_ENTRY
> > MITIGATION_IBRS_ENTRY
> > MITIGATION_SRSO
> > MITIGATION_SLS
>
> The train has already left the station on those. The other mitigations
> don't have "MITIGAT*" at all in front of the name. I.e.:
>
> config RETHUNK
> config CALL_DEPTH_TRACKING
> ...
>
> and prepending them all with MITIGATION_ is going to cause too much
> senseless churn for a reason which I don't think is worth the effort.
I wouldn't call it senseless churn. There are concrete benefits -- for
both users and developers -- of having all the mitigation config options
living in the same config namespace.
Sure, the change might cause pain for users who disable these options,
but do those users actually exist?
--
Josh
next prev parent reply other threads:[~2023-10-11 22:03 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-10-10 10:30 Breno Leitao
2023-10-11 4:42 ` Josh Poimboeuf
2023-10-11 12:20 ` Breno Leitao
2023-10-11 16:49 ` Josh Poimboeuf
2023-10-11 19:03 ` Borislav Petkov
2023-10-11 22:03 ` Josh Poimboeuf [this message]
2023-10-12 7:29 ` Borislav Petkov
2023-10-12 16:48 ` Josh Poimboeuf
2023-10-15 15:06 ` Borislav Petkov
2023-10-16 10:07 ` Ingo Molnar
2023-10-16 12:46 ` Borislav Petkov
2023-10-17 15:08 ` Breno Leitao
2023-10-11 21:59 ` Ingo Molnar
2023-10-12 13:02 ` Breno Leitao
2023-10-12 17:05 ` Josh Poimboeuf
2023-10-12 18:51 ` Ingo Molnar
2023-10-12 20:43 ` Josh Poimboeuf
2023-10-13 10:50 ` Ingo Molnar
2023-10-15 14:11 ` Josh Poimboeuf
2023-10-16 9:45 ` Ingo Molnar
2023-10-17 17:15 ` Josh Poimboeuf
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20231011220325.5uje4xnfxuccumm7@treble \
--to=jpoimboe@kernel.org \
--cc=bp@alien8.de \
--cc=dave.hansen@linux.intel.com \
--cc=hpa@zytor.com \
--cc=leit@meta.com \
--cc=leitao@debian.org \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@redhat.com \
--cc=pawan.kumar.gupta@linux.intel.com \
--cc=peterz@infradead.org \
--cc=tglx@linutronix.de \
--cc=x86@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
all inboxes | Powered by JetHome®