From: David Woodhouse <dwmw2@infradead.org>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
linux-kernel@vger.kernel.org, "Ghitulete,
Razvan-alin" <rga@amazon.com>
Cc: stable@vger.kernel.org, Andy Lutomirski <luto@kernel.org>,
Nadav Amit <nadav.amit@gmail.com>, Borislav Petkov <bp@suse.de>,
Thomas Gleixner <tglx@linutronix.de>,
Andrew Morton <akpm@linux-foundation.org>,
Arjan van de Ven <arjan@linux.intel.com>,
Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave.hansen@intel.com>,
Linus Torvalds <torvalds@linux-foundation.org>,
Mel Gorman <mgorman@suse.de>,
Peter Zijlstra <peterz@infradead.org>,
Rik van Riel <riel@redhat.com>,
linux-mm@kvack.org, Ingo Molnar <mingo@kernel.org>,
Hugh Dickins <hughd@google.com>
Subject: Re: [PATCH 4.4 29/63] x86/mm: Disable PCID on 32-bit kernels
Date: Tue, 09 Jan 2018 18:18:15 +0000 [thread overview]
Message-ID: <1515521895.22302.60.camel@infradead.org> (raw)
In-Reply-To: <1515513940.22302.54.camel@infradead.org>
[-- Attachment #1: Type: text/plain, Size: 1099 bytes --]
On Tue, 2018-01-09 at 16:05 +0000, David Woodhouse wrote:
>
>
> Razvan points out that the #ifdef there is redundant; in older kernels,
> bugs.c is only built on 32-bit anyway.
>
> We're working on backporting the other CPU_BUG_* and sysfs
> vulnerabilities bits to 4.9 (first), and will probably end up
> cherry-picking 62a67e123e ("x86/cpu: Merge bugs.c and bugs_64.c").
s/will probably end up/ended up/
:/sys/devices/system/cpu/vulnerabilities# cat spectre_v2
Mitigation: Full AMD retpoline
:/sys/devices/system/cpu/vulnerabilities# uname -a
Linux localhost 4.9.76-rc1+ #2 SMP Tue Jan 9 17:37:55 GMT 2018 x86_64 x86_64 x86_64 GNU/Linux
http://git.infradead.org/users/rga/retpoline-stable.git/shortlog/refs/heads/linux-4.9.y
passes basic smoke testing so far; will audit it and check for
additional indirect branches which didn't exist in 4.14, tomorrow. And
continue to 4.4 and 3.2 kernels too.
We will also backport the IBRS patches on top, once they're ready.
What we *haven't* included is PTI-specific changes, like (to pick a
random example) the tboot one.
[-- Attachment #2: smime.p7s --]
[-- Type: application/x-pkcs7-signature, Size: 5213 bytes --]
next prev parent reply other threads:[~2018-01-09 18:18 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20180101140042.456380281@linuxfoundation.org>
2018-01-01 14:24 ` [PATCH 4.4 27/63] x86/mm: Reimplement flush_tlb_page() using flush_tlb_mm_range() Greg Kroah-Hartman
2018-01-01 14:24 ` [PATCH 4.4 28/63] x86/mm: Remove the UP asm/tlbflush.h code, always use the (formerly) SMP code Greg Kroah-Hartman
2018-01-01 14:24 ` [PATCH 4.4 29/63] x86/mm: Disable PCID on 32-bit kernels Greg Kroah-Hartman
2018-01-09 16:05 ` David Woodhouse
2018-01-09 18:18 ` David Woodhouse [this message]
2018-01-01 14:24 ` [PATCH 4.4 30/63] x86/mm: Add the nopcid boot option to turn off PCID Greg Kroah-Hartman
2018-01-01 14:24 ` [PATCH 4.4 31/63] x86/mm: Enable CR4.PCIDE on supported systems Greg Kroah-Hartman
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=1515521895.22302.60.camel@infradead.org \
--to=dwmw2@infradead.org \
--cc=akpm@linux-foundation.org \
--cc=arjan@linux.intel.com \
--cc=bp@alien8.de \
--cc=bp@suse.de \
--cc=dave.hansen@intel.com \
--cc=gregkh@linuxfoundation.org \
--cc=hughd@google.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=luto@kernel.org \
--cc=mgorman@suse.de \
--cc=mingo@kernel.org \
--cc=nadav.amit@gmail.com \
--cc=peterz@infradead.org \
--cc=rga@amazon.com \
--cc=riel@redhat.com \
--cc=stable@vger.kernel.org \
--cc=tglx@linutronix.de \
--cc=torvalds@linux-foundation.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