linux-kernel - Re: [RFC] x86, ia32entry: Use sysretl to return from sysenter

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Message-ID: <20150330090408.GD19897@pd.tnic>
Date:	Mon, 30 Mar 2015 11:04:08 +0200
From:	Borislav Petkov <bp@...en8.de>
To:	Andy Lutomirski <luto@...capital.net>
Cc:	Denys Vlasenko <vda.linux@...glemail.com>,
	Andy Lutomirski <luto@...nel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Denys Vlasenko <dvlasenk@...hat.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	X86 ML <x86@...nel.org>, Ingo Molnar <mingo@...nel.org>,
	"H. Peter Anvin" <hpa@...or.com>, stable <stable@...r.kernel.org>
Subject: Re: [RFC] x86, ia32entry: Use sysretl to return from sysenter

On Sun, Mar 29, 2015 at 02:16:05PM -0700, Andy Lutomirski wrote:
> > sysexit_from_sys_call:
> >         /*
> >          * Sysretl works even on Intel CPUs.  Use it in preference to sysexit,
> >          * since it avoids a dicey window with interrupts enabled.

Btw, let's agree on the convention to write instructions in capital
letters, i.e. Sysretl -> SYSRET and so on...

Thanks.

-- 
Regards/Gruss,
    Boris.

ECO tip #101: Trim your mails when you reply.
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