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[Xen-devel] Re: [PATCH 0/3] x86/microcode: support for microcode update

To: Jeremy Fitzhardinge <jeremy@xxxxxxxx>
Subject: [Xen-devel] Re: [PATCH 0/3] x86/microcode: support for microcode update in Xen dom0
From: "H. Peter Anvin" <hpa@xxxxxxxxx>
Date: Wed, 12 Oct 2011 15:29:02 -0700
Cc: Jeremy Fitzhardinge <jeremy.fitzhardinge@xxxxxxxxxx>, Tigran Aivazian <tigran@xxxxxxxxxxxxxxxxxxxx>, the arch/x86 maintainers <x86@xxxxxxxxxx>, Borislav Petkov <bp@xxxxxxxxx>, Linux Kernel Mailing List <linux-kernel@xxxxxxxxxxxxxxx>, Xen Devel <xen-devel@xxxxxxxxxxxxxxxxxxx>, Ingo Molnar <mingo@xxxxxxx>, Thomas Gleixner <tglx@xxxxxxxxxxxxx>
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On 10/12/2011 03:27 PM, Jeremy Fitzhardinge wrote:

The current scheme has worked pretty well so far; there doesn't seem to
be a huge concern about it.  Have there been actual observed failures
with the current mechanism, or is the drive to make it earlier driven by
an aesthetic desire to make it "as it should be"?


Yes, there has. There is at least one case where we have to print an error message saying "update your BIOS" because our current microcode update is too late.

        -hpa

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