From: Boris Ostrovsky <boris.ostrovsky@oracle.com>
To: Andy Lutomirski <luto@amacapital.net>, Brian Gerst <brgerst@gmail.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Linux Virtualization <virtualization@lists.linux-foundation.org>,
Ingo Molnar <mingo@redhat.com>,
David Vrabel <david.vrabel@citrix.com>,
Andrew Lutomirski <luto@kernel.org>,
"H. Peter Anvin" <hpa@zytor.com>,
"xen-devel@lists.xenproject.org" <xen-devel@lists.xenproject.org>,
Thomas Gleixner <tglx@linutronix.de>,
Borislav Petkov <bp@suse.de>
Subject: Re: [PATCH 1/3] x86/xen: Avoid fast syscall path for Xen PV guests
Date: Wed, 18 Nov 2015 17:05:23 -0500 [thread overview]
Message-ID: <564CF623.40502@oracle.com> (raw)
In-Reply-To: <CALCETrUTp=Shcmvh44fE5URugd6c41dDGdDM8cKvnP=Gqap45A@mail.gmail.com>
On 11/18/2015 03:58 PM, Andy Lutomirski wrote:
> On Wed, Nov 18, 2015 at 12:50 PM, Brian Gerst <brgerst@gmail.com> wrote:
>>
>> Can you just add !xen_pv_domain() to the opportunistic SYSRET check
>> instead? Bury the alternatives in that macro, ie.
>> static_cpu_has(X86_FEATURE_XENPV). That would likely benefit other
>> code as well.
> We could, but that won't help the 64-bit case where we want to keep
> the full asm path.
I don't think I understand what you mean here. Which full asm path?
-boris
next prev parent reply other threads:[~2015-11-18 22:05 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1447877179-2775-1-git-send-email-boris.ostrovsky@oracle.com>
2015-11-18 20:06 ` [PATCH 1/3] x86/xen: Avoid fast syscall path for Xen PV guests Boris Ostrovsky
2015-11-18 20:06 ` [PATCH 2/3] x86: irq_enable_sysexit pv op is no longer needed Boris Ostrovsky
2015-11-18 20:06 ` [PATCH 3/3] x86: usergs_sysret32 " Boris Ostrovsky
[not found] ` <1447877179-2775-2-git-send-email-boris.ostrovsky@oracle.com>
2015-11-18 20:21 ` [PATCH 1/3] x86/xen: Avoid fast syscall path for Xen PV guests Andy Lutomirski
2015-11-18 20:47 ` Borislav Petkov
2015-11-18 20:50 ` Brian Gerst
[not found] ` <CAMzpN2iofkEeYkiZa8FRJ5gbz5smPbV0COOye9wZ9OhV6pBfow@mail.gmail.com>
2015-11-18 20:58 ` Andy Lutomirski
2015-11-18 22:05 ` Boris Ostrovsky [this message]
2015-11-19 12:08 ` Borislav Petkov
[not found] ` <1447877179-2775-3-git-send-email-boris.ostrovsky@oracle.com>
2015-11-18 20:23 ` [PATCH 2/3] x86: irq_enable_sysexit pv op is no longer needed Andy Lutomirski
[not found] ` <20151118201152.GA6094@char.us.oracle.com>
2015-11-18 20:34 ` Boris Ostrovsky
[not found] ` <1447877179-2775-4-git-send-email-boris.ostrovsky@oracle.com>
2015-11-18 20:26 ` [PATCH 3/3] x86: usergs_sysret32 " Andy Lutomirski
2015-11-19 12:10 ` [PATCH 0/3] Fix and cleanup for 32-bit PV sysexit Borislav Petkov
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=564CF623.40502@oracle.com \
--to=boris.ostrovsky@oracle.com \
--cc=bp@suse.de \
--cc=brgerst@gmail.com \
--cc=david.vrabel@citrix.com \
--cc=hpa@zytor.com \
--cc=konrad.wilk@oracle.com \
--cc=linux-kernel@vger.kernel.org \
--cc=luto@amacapital.net \
--cc=luto@kernel.org \
--cc=mingo@redhat.com \
--cc=tglx@linutronix.de \
--cc=virtualization@lists.linux-foundation.org \
--cc=xen-devel@lists.xenproject.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).