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Re: [Xen-devel] [PATCH] x86, amd_ucode: Skip microcode updates for final levels

On 7/31/2015 3:48 PM, Andrew Cooper wrote:

So, the patch id values have only been obtained empirically.
The Linux patch provides the bug reference for
(It's a fairly long thread but the gist of it is that people
predominantly seem to be experiencing system hang issues
when they try to update microcode levels from these patch ids:
0x01000098,  0x0100009f, 0x010000af)

 From discussing about it internally, we gathered that OS/hypervisor
cannot reliably perform microcode updates beyond these specified levels
due to HW issues.
Ok - please include this information in the comment as well please.

Will do that.


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