linux-kernel - Re: [PATCH] x86/xsave: Robustify and merge macros

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Message-ID: <20150402164515.GF3483@pd.tnic>
Date:	Thu, 2 Apr 2015 18:45:15 +0200
From:	Borislav Petkov <bp@...en8.de>
To:	Quentin Casasnovas <quentin.casasnovas@...cle.com>
Cc:	X86 ML <x86@...nel.org>, LKML <linux-kernel@...r.kernel.org>,
	"H. Peter Anvin" <hpa@...or.com>, Ingo Molnar <mingo@...nel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Oleg Nesterov <oleg@...hat.com>,
	Andy Lutomirski <luto@...capital.net>
Subject: Re: [PATCH] x86/xsave: Robustify and merge macros

On Thu, Apr 02, 2015 at 06:33:40PM +0200, Quentin Casasnovas wrote:
> I would personnaly add it to the non _booting() variants as well to make
> sure the alternative instructions _are_ applied, since otherwise that would
> probably cause random failures to restore the xsaveopt/xsaves context
> previously saved.

This is probably the only reason why I should keep them: so that there
are no mismatched save and restore uses. But this needs to be cleaned up
properly, maybe the two even merged. It would need more analysis at the
callsites. Definitely future work.

Thanks.

-- 
Regards/Gruss,
    Boris.

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