mirrors/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2024-10-28 15:20:41 +00:00
Code Issues Releases Wiki Activity
linux-stable/arch
History
Thomas Gleixner 6a847a6057 x86/speculation: Add prctl() control for indirect branch speculation 
commit 9137bb27e6 upstream

Add the PR_SPEC_INDIRECT_BRANCH option for the PR_GET_SPECULATION_CTRL and
PR_SET_SPECULATION_CTRL prctls to allow fine grained per task control of
indirect branch speculation via STIBP and IBPB.

Invocations:
 Check indirect branch speculation status with
 - prctl(PR_GET_SPECULATION_CTRL, PR_SPEC_INDIRECT_BRANCH, 0, 0, 0);

 Enable indirect branch speculation with
 - prctl(PR_SET_SPECULATION_CTRL, PR_SPEC_INDIRECT_BRANCH, PR_SPEC_ENABLE, 0, 0);

 Disable indirect branch speculation with
 - prctl(PR_SET_SPECULATION_CTRL, PR_SPEC_INDIRECT_BRANCH, PR_SPEC_DISABLE, 0, 0);

 Force disable indirect branch speculation with
 - prctl(PR_SET_SPECULATION_CTRL, PR_SPEC_INDIRECT_BRANCH, PR_SPEC_FORCE_DISABLE, 0, 0);

See Documentation/userspace-api/spec_ctrl.rst.

Signed-off-by: Tim Chen <tim.c.chen@linux.intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Ingo Molnar <mingo@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Jiri Kosina <jkosina@suse.cz>
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: David Woodhouse <dwmw@amazon.co.uk>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Casey Schaufler <casey.schaufler@intel.com>
Cc: Asit Mallick <asit.k.mallick@intel.com>
Cc: Arjan van de Ven <arjan@linux.intel.com>
Cc: Jon Masters <jcm@redhat.com>
Cc: Waiman Long <longman9394@gmail.com>
Cc: Greg KH <gregkh@linuxfoundation.org>
Cc: Dave Stewart <david.c.stewart@intel.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/20181125185005.866780996@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-12-05 19:41:22 +01:00
..
alpha arch/alpha, termios: implement BOTHER, IBSHIFT and termios2 2018-11-21 09:24:10 +01:00
arc ARC: build: Don't set CROSS_COMPILE in arch's Makefile 2018-10-20 09:48:53 +02:00
arm ARM: dts: exynos: Fix invalid node referenced by i2c20 alias in Peach Pit and Pi 2018-12-01 09:42:59 +01:00
arm64 arm64: remove no-op -p linker flag 2018-12-01 09:42:55 +01:00
blackfin pinctrl: adi2: Fix Kconfig build problem 2017-12-20 10:10:34 +01:00
c6x
cris bug.h: work around GCC PR82365 in BUG() 2018-05-30 07:52:00 +02:00
frv
h8300 h8300: remove extraneous __BIG_ENDIAN definition 2018-03-28 18:24:38 +02:00
hexagon hexagon: modify ffs() and fls() to return int 2018-10-10 08:54:25 +02:00
ia64 ia64/err-inject: Use get_user_pages_fast() 2018-05-30 07:52:11 +02:00
m32r m32r: fix endianness constraints 2018-02-28 10:19:44 +01:00
m68k m68k: fix "bad page state" oops on ColdFire boot 2018-08-24 13:09:11 +02:00
metag .gitignore: move *.dtb and *.dtb.S patterns to the top-level .gitignore 2018-02-13 10:19:46 +01:00
microblaze microblaze: Fix simpleImage format generation 2018-08-03 07:50:40 +02:00
mips MIPS: OCTEON: cavium_octeon_defconfig: re-enable OCTEON USB driver 2018-11-27 16:10:50 +01:00
mn10300 mn10300/misalignment: Use SIGSEGV SEGV_MAPERR to report a failed user copy 2018-02-16 20:23:11 +01:00
nios2 .gitignore: move *.dtb and *.dtb.S patterns to the top-level .gitignore 2018-02-13 10:19:46 +01:00
openrisc openrisc: entry: Fix delay slot exception detection 2018-08-24 13:09:11 +02:00
parisc parisc: Fix exported address of os_hpmc handler 2018-11-13 11:14:46 -08:00
powerpc powerpc/numa: Suppress "VPHN is not supported" messages 2018-12-01 09:42:54 +01:00
s390 s390/mm: Check for valid vma before zapping in gmap_discard 2018-12-01 09:42:59 +01:00
score
sh sh: fix build failure for J2 cpu with SMP disabled 2018-06-21 04:02:54 +09:00
sparc sparc64: Make proc_id signed. 2018-11-13 11:14:50 -08:00
tile
um um: Give start_idle_thread() a return code 2018-11-27 16:10:46 +01:00
unicore32 kmemcheck: stop using GFP_NOTRACK and SLAB_NOTRACK 2018-02-22 15:42:23 +01:00
x86 x86/speculation: Add prctl() control for indirect branch speculation 2018-12-05 19:41:22 +01:00
xtensa xtensa: fix boot parameters address translation 2018-11-21 09:24:06 +01:00
.gitignore
Kconfig compiler.h: Allow arch-specific asm/compiler.h 2018-11-04 14:52:46 +01:00