Re: [tip:x86/microcode] x86/microcode_intel_early.c: Early update ucode on Intel's CPU

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Subject: Re: [tip:x86/microcode] x86/microcode_intel_early.c: Early update ucode on Intel's CPU
From: Borislav Petkov <bp@xxxxxxxxx>
Date: Thu, 20 Dec 2012 00:00:15 +0100
Cc: "H. Peter Anvin" <hpa@xxxxxxxxx>, Yinghai Lu <yinghai@xxxxxxxxxx>, "H. Peter Anvin" <hpa@xxxxxxxxxxxxxxx>, "Yu, Fenghua" <fenghua.yu@xxxxxxxxx>, "mingo@xxxxxxxxxx" <mingo@xxxxxxxxxx>, "linux-kernel@xxxxxxxxxxxxxxx" <linux-kernel@xxxxxxxxxxxxxxx>, "tglx@xxxxxxxxxxxxx" <tglx@xxxxxxxxxxxxx>, "linux-tip-commits@xxxxxxxxxxxxxxx" <linux-tip-commits@xxxxxxxxxxxxxxx>, Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>, Stefano Stabellini <Stefano.Stabellini@xxxxxxxxxxxxx>
In-reply-to: <20121219225505.GA2968@jshin-Toonie>
Mail-followup-to: Borislav Petkov <bp@xxxxxxxxx>, Jacob Shin <jacob.shin@xxxxxxx>, "H. Peter Anvin" <hpa@xxxxxxxxx>, Yinghai Lu <yinghai@xxxxxxxxxx>, "H. Peter Anvin" <hpa@xxxxxxxxxxxxxxx>, "Yu, Fenghua" <fenghua.yu@xxxxxxxxx>, "mingo@xxxxxxxxxx" <mingo@xxxxxxxxxx>, "linux-kernel@xxxxxxxxxxxxxxx" <linux-kernel@xxxxxxxxxxxxxxx>, "tglx@xxxxxxxxxxxxx" <tglx@xxxxxxxxxxxxx>, "linux-tip-commits@xxxxxxxxxxxxxxx" <linux-tip-commits@xxxxxxxxxxxxxxx>, Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>, Stefano Stabellini <Stefano.Stabellini@xxxxxxxxxxxxx>
User-agent: Mutt/1.5.21 (2010-09-15)

On Wed, Dec 19, 2012 at 04:55:06PM -0600, Jacob Shin wrote:
> Well, really the problem is with any memory hole above 4GB that is too
> big to be covered by variable range MTRRs as UC.

Why, their PhysBase field is the 40 MSB bits of the physical address.
That should be more than TB.

-- 
Regards/Gruss,
    Boris.

Sent from a fat crate under my desk. Formatting is fine.
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Follow-Ups:
- Re: [tip:x86/microcode] x86/microcode_intel_early.c: Early update ucode on Intel's CPU
  - From: H. Peter Anvin

References:
- Re: [tip:x86/microcode] x86/microcode_intel_early.c: Early update ucode on Intel's CPU
  - From: Yinghai Lu
- Re: [tip:x86/microcode] x86/microcode_intel_early.c: Early update ucode on Intel's CPU
  - From: H. Peter Anvin
- Re: [tip:x86/microcode] x86/microcode_intel_early.c: Early update ucode on Intel's CPU
  - From: Yinghai Lu
- Re: [tip:x86/microcode] x86/microcode_intel_early.c: Early update ucode on Intel's CPU
  - From: H. Peter Anvin
- Re: [tip:x86/microcode] x86/microcode_intel_early.c: Early update ucode on Intel's CPU
  - From: Yinghai Lu
- Re: [tip:x86/microcode] x86/microcode_intel_early.c: Early update ucode on Intel's CPU
  - From: H. Peter Anvin
- Re: [tip:x86/microcode] x86/microcode_intel_early.c: Early update ucode on Intel's CPU
  - From: H. Peter Anvin
- Re: [tip:x86/microcode] x86/microcode_intel_early.c: Early update ucode on Intel's CPU
  - From: Jacob Shin
- Re: [tip:x86/microcode] x86/microcode_intel_early.c: Early update ucode on Intel's CPU
  - From: H. Peter Anvin
- Re: [tip:x86/microcode] x86/microcode_intel_early.c: Early update ucode on Intel's CPU
  - From: Jacob Shin

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