Re: [PATCH] x86/microcode/intel: Ensure new microcode processor flags match with cpu's pf

Zhenzhong Duan
2018-06-19T09:24:48Z

On 2018/6/19 17:12, Borislav Petkov wrote:
> On Tue, Jun 19, 2018 at 12:49:40PM +0800, Zhenzhong Duan wrote:
>> Imagine kernel already found a microcode blob A with extended sig/pf
>> matching current cpu, then another microcode B is checked which doesn't
>> match current cpu...
> Do you see the
>
> if (!microcode_matches(mc_header, uci->cpu_sig.sig)) {
>
> call a couple of lines earlier?
Sure, but it didn't ensure a match in stepping and pf, is that expected?

Thanks
Zhenzhong