From mboxrd@z Thu Jan 1 00:00:00 1970 From: Borislav Petkov Subject: Re: [PATCH v3 0/3] x86/mm: INVPCID support Date: Mon, 1 Feb 2016 11:51:32 +0100 Message-ID: <20160201105132.GB6438@pd.tnic> References: Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Return-path: Content-Disposition: inline In-Reply-To: Sender: linux-kernel-owner@vger.kernel.org To: Andy Lutomirski , Ingo Molnar Cc: x86@kernel.org, linux-kernel@vger.kernel.org, Brian Gerst , Dave Hansen , Linus Torvalds , Oleg Nesterov , "linux-mm@kvack.org" , Andrey Ryabinin List-Id: linux-mm.kvack.org 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-aryabinin@virtuozzo.com > http://lkml.kernel.org/g/1452516679-32040-3-git-send-email-aryabinin@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 -- Regards/Gruss, Boris. ECO tip #101: Trim your mails when you reply.