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Date: Fri, 29 Jan 2016 14:21:14 +0100
From: Borislav Petkov <bp@alien8.de>
To: Thomas Gleixner <tglx@linutronix.de>
Cc: Andy Lutomirski <luto@kernel.org>, Ingo Molnar <mingo@kernel.org>,
        x86@kernel.org, linux-kernel@vger.kernel.org,
        Brian Gerst <brgerst@gmail.com>,
        Dave Hansen <dave.hansen@linux.intel.com>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        Oleg Nesterov <oleg@redhat.com>,
        "linux-mm@kvack.org" <linux-mm@kvack.org>,
        Andrey Ryabinin <aryabinin@virtuozzo.com>
Subject: Re: several messages
Message-ID: <20160129132114.GF10187@pd.tnic>
References: <cover.1453746505.git.luto@kernel.org>
 <20160125185706.GA28416@gmail.com>
 <alpine.DEB.2.11.1601271108230.3886@nanos>
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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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