linux-kernel - Re: several messages

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Message-ID: <20160129132114.GF10187@pd.tnic>
Date:	Fri, 29 Jan 2016 14:21:14 +0100
From:	Borislav Petkov <bp@...en8.de>
To:	Thomas Gleixner <tglx@...utronix.de>
Cc:	Andy Lutomirski <luto@...nel.org>, Ingo Molnar <mingo@...nel.org>,
	x86@...nel.org, linux-kernel@...r.kernel.org,
	Brian Gerst <brgerst@...il.com>,
	Dave Hansen <dave.hansen@...ux.intel.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Oleg Nesterov <oleg@...hat.com>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	Andrey Ryabinin <aryabinin@...tuozzo.com>
Subject: Re: several messages

On Wed, Jan 27, 2016 at 11:09:04AM +0100, Thomas Gleixner wrote:
> On Mon, 25 Jan 2016, Andy Lutomirski wrote:
> > This is a straightforward speedup on Ivy Bridge and newer, IIRC.
> > (I tested on Skylake.  INVPCID is not available on Sandy Bridge.
> > I don't have Ivy Bridge, Haswell or Broadwell to test on, so I
> > could be wrong as to when the feature was introduced.)
>
> Haswell and Broadwell have it. No idea about ivy bridge.

I have an IVB model 58. It doesn't have it:

CPUID_0x00000007: EAX=0x00000000, EBX=0x00000281, ECX=0x00000000, EDX=0x00000000

INVPCID should be EBX[10].

-- 
Regards/Gruss,
    Boris.

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