From: Wei Liu <wei.liu2@citrix.com>
To: Andrew Cooper <andrew.cooper3@citrix.com>
Cc: "Juergen Gross" <jgross@suse.com>,
"Roger Pau Monné" <roger.pau@citrix.com>,
"Wei Liu" <wei.liu2@citrix.com>,
"Jan Beulich" <JBeulich@suse.com>,
Xen-devel <xen-devel@lists.xen.org>
Subject: Re: [PATCH 04/10] x86/spec_ctrl: Fold the XEN_IBRS_{SET, CLEAR} ALTERNATIVES together
Date: Mon, 14 May 2018 16:20:40 +0100 [thread overview]
Message-ID: <20180514152040.5qhfrlfeifoagvmu@citrix.com> (raw)
In-Reply-To: <1526035094-14343-5-git-send-email-andrew.cooper3@citrix.com>
On Fri, May 11, 2018 at 11:38:08AM +0100, Andrew Cooper wrote:
> Currently, the SPEC_CTRL_{ENTRY,EXIT}_* macros encode Xen's choice of
> MSR_SPEC_CTRL as an immediate constant, and chooses between IBRS or not by
> doubling up the entire alternative block.
>
> There is now a variable holding Xen's choice of value, so use that and
> simplify the alternatives.
>
> Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Reviewed-by: Wei Liu <wei.liu2@citrix.com>
_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xenproject.org
https://lists.xenproject.org/mailman/listinfo/xen-devel
next prev parent reply other threads:[~2018-05-14 15:20 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-05-11 10:38 [PATCH for-4.11 00/10] x86: Improvements and fixes to Spectre handling Andrew Cooper
2018-05-11 10:38 ` [PATCH 01/10] x86/spec_ctrl: Read MSR_ARCH_CAPABILITIES only once Andrew Cooper
2018-05-11 14:32 ` Konrad Rzeszutek Wilk
2018-05-14 9:23 ` Wei Liu
2018-05-11 10:38 ` [PATCH 02/10] x86/spec_ctrl: Express Xen's choice of MSR_SPEC_CTRL value as a variable Andrew Cooper
2018-05-14 10:15 ` Wei Liu
2018-05-11 10:38 ` [PATCH 03/10] x86/spec_ctrl: Merge bti_ist_info and use_shadow_spec_ctrl into spec_ctrl_flags Andrew Cooper
2018-05-14 15:13 ` Wei Liu
2018-05-11 10:38 ` [PATCH 04/10] x86/spec_ctrl: Fold the XEN_IBRS_{SET, CLEAR} ALTERNATIVES together Andrew Cooper
2018-05-14 15:20 ` Wei Liu [this message]
2018-05-11 10:38 ` [PATCH 05/10] x86/spec_ctrl: Rename bits of infrastructure to avoid NATIVE and VMEXIT Andrew Cooper
2018-05-14 15:21 ` Wei Liu
2018-05-11 10:38 ` [PATCH 06/10] x86/spec_ctrl: Split X86_FEATURE_SC_MSR into PV and HVM variants Andrew Cooper
2018-05-14 15:22 ` Wei Liu
2018-05-14 15:27 ` Jan Beulich
2018-05-15 19:52 ` Andrew Cooper
2018-05-16 6:38 ` Jan Beulich
2018-05-16 10:28 ` Andrew Cooper
2018-05-16 10:49 ` Jan Beulich
2018-05-16 10:56 ` Andrew Cooper
2018-05-11 10:38 ` [PATCH 07/10] x86/spec_ctrl: Explicitly set Xen's default MSR_SPEC_CTRL value Andrew Cooper
2018-05-14 15:39 ` Wei Liu
2018-05-14 15:52 ` Jan Beulich
2018-05-16 11:08 ` Andrew Cooper
2018-05-16 11:12 ` Wei Liu
2018-05-11 10:38 ` [PATCH 08/10] x86/cpuid: Improvements to guest policies for speculative sidechannel features Andrew Cooper
2018-05-11 10:38 ` [PATCH 09/10] x86/spec_ctrl: Introduce a new `spec-ctrl=` command line argument to replace `bti=` Andrew Cooper
2018-05-11 10:38 ` [PATCH 10/10] x86/spec_ctrl: Elide MSR_SPEC_CTRL handling in idle context when possible Andrew Cooper
2018-05-14 15:48 ` Wei Liu
2018-05-16 11:27 ` Andrew Cooper
2018-05-16 11:28 ` Wei Liu
2018-05-14 9:23 ` [PATCH for-4.11 00/10] x86: Improvements and fixes to Spectre handling Wei Liu
2018-05-14 15:31 ` Jan Beulich
2018-05-15 18:25 ` Juergen Gross
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=20180514152040.5qhfrlfeifoagvmu@citrix.com \
--to=wei.liu2@citrix.com \
--cc=JBeulich@suse.com \
--cc=andrew.cooper3@citrix.com \
--cc=jgross@suse.com \
--cc=roger.pau@citrix.com \
--cc=xen-devel@lists.xen.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;
as well as URLs for NNTP newsgroup(s).