Re: [PATCH 0/7] IBRS patch series

Tim Chen
2018-01-04T19:10:13Z

On 01/04/2018 11:05 AM, Justin Forbes wrote:
> On Thu, Jan 4, 2018 at 11:56 AM, Tim Chen <tim.c.chen@linux.intel.com> wrote:
>> This patch series enables the basic detection and usage of x86 indirect
>> branch speculation feature. It enables the indirect branch restricted
>> speculation (IBRS) on kernel entry and disables it on exit.
>> It enumerates the indirect branch prediction barrier (IBPB).
>>
>> The x86 IBRS feature requires corresponding microcode support.
>> It mitigates the variant 2 vulnerability described in
>> https://googleprojectzero.blogspot.com/2018/01/reading-privileged-memory-with-side.html
>>
>
> Are there plans to make the corresponding microcode support available?
>

The microcode patches should be released soon.

Tim