On Fri, Jan 29, 2016 at 11:42:56AM -0800, Andy Lutomirski wrote:
> Boris, I think you already have these prerequisites queued up:
>
> http://lkml.kernel.org/g/1452516679-32040-2-git-send-email-aryabi...@virtuozzo.com
> http://lkml.kernel.org/g/1452516679-32040-3-git-send-email-aryabi...@virtuozzo.com
>
> This is a straightforward speedup on Ivy Bridge and newer, IIRC.
> (I tested on Skylake. INVPCID is not available on Sandy Bridge.
> I don't have Ivy Bridge, Haswell or Broadwell to test on, so I
> could be wrong as to when the feature was introduced.)
>
> I think we should consider these patches separately from the rest
> of the PCID stuff -- they barely interact, and this part is much
> simpler and is useful on its own.
>
> Changes from v2:
> - Add macros for the INVPCID mode numbers.
> - Add a changelog message for the chicken bit.
>
> v1 was exactly identical to patches 2-4 of the PCID RFC series.
> Andy Lutomirski (3):
> x86/mm: Add INVPCID helpers
> x86/mm: Add a noinvpcid option to turn off INVPCID
> x86/mm: If INVPCID is available, use it to flush global mappings
>
> Documentation/kernel-parameters.txt | 2 ++
> arch/x86/include/asm/tlbflush.h | 57
> +++++++++++++++++++++++++++++++++++++
> arch/x86/kernel/cpu/common.c | 16 +++++++++++
> 3 files changed, 75 insertions(+)
All 5 (3 INVPCID + 2 KASAN ones at the URLs above):
Reviewed-by: Borislav Petkov <b...@suse.de>
--
Regards/Gruss,
Boris.
ECO tip #101: Trim your mails when you reply.
