x86/mm: Enable CR4.PCIDE on supported systems
authorAndy Lutomirski <luto@kernel.org>
Thu, 29 Jun 2017 15:53:21 +0000 (08:53 -0700)
committerIngo Molnar <mingo@kernel.org>
Wed, 5 Jul 2017 08:52:58 +0000 (10:52 +0200)
commit660da7c9228f685b2ebe664f9fd69aaddcc420b5
tree363dd4d5cc99b8d78cf66d8f6c3973a1d852dcb5
parent0790c9aad84901ca1bdc14746175549c8b5da215
x86/mm: Enable CR4.PCIDE on supported systems

We can use PCID if the CPU has PCID and PGE and we're not on Xen.

By itself, this has no effect. A followup patch will start using PCID.

Signed-off-by: Andy Lutomirski <luto@kernel.org>
Reviewed-by: Nadav Amit <nadav.amit@gmail.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Arjan van de Ven <arjan@linux.intel.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Juergen Gross <jgross@suse.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: linux-mm@kvack.org
Link: http://lkml.kernel.org/r/6327ecd907b32f79d5aa0d466f04503bbec5df88.1498751203.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
arch/x86/include/asm/tlbflush.h
arch/x86/kernel/cpu/common.c
arch/x86/xen/enlighten_pv.c