x86/mm: Disable PCID on 32-bit kernels
authorAndy Lutomirski <luto@kernel.org>
Thu, 29 Jun 2017 15:53:19 +0000 (08:53 -0700)
committerIngo Molnar <mingo@kernel.org>
Wed, 5 Jul 2017 08:52:57 +0000 (10:52 +0200)
commitcba4671af7550e008f7a7835f06df0763825bf3e
tree85ce33494e9011523d425ad631a0c2198f5580d6
parent43858b4f25cf0adc5c2ca9cf5ce5fdf2532941e5
x86/mm: Disable PCID on 32-bit kernels

32-bit kernels on new hardware will see PCID in CPUID, but PCID can
only be used in 64-bit mode.  Rather than making all PCID code
conditional, just disable the feature on 32-bit builds.

Signed-off-by: Andy Lutomirski <luto@kernel.org>
Reviewed-by: Nadav Amit <nadav.amit@gmail.com>
Reviewed-by: Borislav Petkov <bp@suse.de>
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: 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/2e391769192a4d31b808410c383c6bf0734bc6ea.1498751203.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
arch/x86/include/asm/disabled-features.h
arch/x86/kernel/cpu/bugs.c