From: "Woodhouse, David" <dwmw@amazon.co.uk>
To: "tglx@linutronix.de" <tglx@linutronix.de>
Cc: "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"peterz@infradead.org" <peterz@infradead.org>,
"arjan@linux.intel.com" <arjan@linux.intel.com>,
"Raslan, KarimAllah" <karahmed@amazon.de>,
"torvalds@linux-foundation.org" <torvalds@linux-foundation.org>,
"tim.c.chen@linux.intel.com" <tim.c.chen@linux.intel.com>,
"ak@linux.intel.com" <ak@linux.intel.com>,
"x86@kernel.org" <x86@kernel.org>,
"pbonzini@redhat.com" <pbonzini@redhat.com>,
"bp@alien8.de" <bp@alien8.de>,
"gregkh@linux-foundation.org" <gregkh@linux-foundation.org>
Subject: Re: [PATCH 4/4] x86/pti: Do not enable PTI on fixed Intel processors
Date: Sat, 20 Jan 2018 20:13:12 +0000 [thread overview]
Message-ID: <1516479191.9814.4.camel@amazon.co.uk> (raw)
In-Reply-To: <alpine.DEB.2.20.1801202107300.1998@nanos>
[-- Attachment #1.1: Type: text/plain, Size: 448 bytes --]
On Sat, 2018-01-20 at 21:08 +0100, Thomas Gleixner wrote:
> On Sat, 20 Jan 2018, David Woodhouse wrote:
>
> > When they advertise the IA32_ARCH_CAPABILITIES MSR and it has the RDCL_NO
> > bit set, they don't need KPTI either.
>
> Do they exist today? And do we have documentation for that new MSR already?
No and yes:
https://software.intel.com/sites/default/files/managed/c5/63/336996-Speculative-Execution-Side-Channel-Mitigations.pdf
[-- Attachment #1.2: smime.p7s --]
[-- Type: application/x-pkcs7-signature, Size: 5210 bytes --]
[-- Attachment #2.1: Type: text/plain, Size: 197 bytes --]
Amazon Web Services UK Limited. Registered in England and Wales with registration number 08650665 and which has its registered office at 60 Holborn Viaduct, London EC1A 2FD, United Kingdom.
[-- Attachment #2.2: Type: text/html, Size: 197 bytes --]
next prev parent reply other threads:[~2018-01-20 20:13 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-01-20 12:03 [PATCH 0/4] Basic Speculation Control feature support David Woodhouse
2018-01-20 12:03 ` [PATCH 1/4] x86/cpufeatures: Add Intel feature bits for Speculation Control David Woodhouse
2018-01-20 20:29 ` Borislav Petkov
2018-01-20 21:51 ` Steven Noonan
2018-01-20 21:57 ` David Woodhouse
2018-01-20 12:03 ` [PATCH 2/4] x86/cpufeatures: Add AMD feature bits for Prediction Command David Woodhouse
2018-01-21 12:16 ` Borislav Petkov
2018-01-21 12:22 ` David Woodhouse
2018-01-21 12:34 ` Borislav Petkov
2018-01-21 12:41 ` David Woodhouse
2018-01-21 17:36 ` Tom Lendacky
2018-01-21 17:51 ` Borislav Petkov
2018-01-20 12:03 ` [PATCH 3/4] x86/msr: Add definitions for new speculation control MSRs David Woodhouse
2018-01-20 12:03 ` [PATCH 4/4] x86/pti: Do not enable PTI on fixed Intel processors David Woodhouse
2018-01-20 20:08 ` Thomas Gleixner
2018-01-20 20:13 ` Thomas Gleixner
2018-01-20 20:13 ` Woodhouse, David [this message]
2018-01-20 20:13 ` Woodhouse, David
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=1516479191.9814.4.camel@amazon.co.uk \
--to=dwmw@amazon.co.uk \
--cc=ak@linux.intel.com \
--cc=arjan@linux.intel.com \
--cc=bp@alien8.de \
--cc=gregkh@linux-foundation.org \
--cc=karahmed@amazon.de \
--cc=linux-kernel@vger.kernel.org \
--cc=pbonzini@redhat.com \
--cc=peterz@infradead.org \
--cc=tglx@linutronix.de \
--cc=tim.c.chen@linux.intel.com \
--cc=torvalds@linux-foundation.org \
--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®