linux-kernel - Re: [PATCH v4 05/10] x86/xsaves: Align xstate components according to CPUID

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Message-ID: <5723C00A.3090903@linux.intel.com>
Date:	Fri, 29 Apr 2016 13:11:54 -0700
From:	Dave Hansen <dave.hansen@...ux.intel.com>
To:	Yu-cheng Yu <yu-cheng.yu@...el.com>, x86@...nel.org,
	"H. Peter Anvin" <hpa@...or.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>, linux-kernel@...r.kernel.org
Cc:	Andy Lutomirski <luto@...nel.org>, Borislav Petkov <bp@...e.de>,
	Sai Praneeth Prakhya <sai.praneeth.prakhya@...el.com>,
	"Ravi V. Shankar" <ravi.v.shankar@...el.com>,
	Fenghua Yu <fenghua.yu@...el.com>
Subject: Re: [PATCH v4 05/10] x86/xsaves: Align xstate components according to
 CPUID

On 03/04/2016 10:12 AM, Yu-cheng Yu wrote:
> CPUID function 0x0d, sub function (i, i > 1) returns in ecx[1] the
> alignment requirement of component i when the compacted format is used.
> 
> If ecx[1] is 0, component i is located immediately following the preceding
> component. If ecx[1] is 1, component i is located on the next 64-byte
> boundary following the preceding component.

Reviewed-by: Dave Hansen <dave.hansen@...el.com>