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Re: [Xen-devel] [PATCH] x86/ucode: Improve error handling and container file processing on AMD





On 12/07/2012 10:08 AM, Jan Beulich wrote:
On 07.12.12 at 14:46, Boris Ostrovsky <boris.ostrovsky@xxxxxxx> wrote:
Do we really need what microcode_init() does?

Oh yes, absolutely. How else would boot time microcode loading
work for secondary CPUs without this? Note that the notifier only
deals with the CPU_DEAD case.

start_secondary() -> microcode_resume_cpu() -> microcode_ops->apply_microcode() will update non-boot CPUs in most cases.

This won't quite work when secondary CPU is different from (or at different patch level than) boot CPU but that can be fixed.

-boris


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