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6c2eb44188
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Josh Poimboeuf 6c2eb44188 powerpc/speculation: Support 'mitigations=' cmdline option 
commit 782e69efb3 upstream

Configure powerpc CPU runtime speculation bug mitigations in accordance
with the 'mitigations=' cmdline option.  This affects Meltdown, Spectre
v1, Spectre v2, and Speculative Store Bypass.

The default behavior is unchanged.

Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Jiri Kosina <jkosina@suse.cz> (on x86)
Reviewed-by: Jiri Kosina <jkosina@suse.cz>
Cc: Borislav Petkov <bp@alien8.de>
Cc: "H . Peter Anvin" <hpa@zytor.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Jiri Kosina <jikos@kernel.org>
Cc: Waiman Long <longman@redhat.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Jon Masters <jcm@redhat.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: linuxppc-dev@lists.ozlabs.org
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: linux-s390@vger.kernel.org
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-arch@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Tyler Hicks <tyhicks@canonical.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Steven Price <steven.price@arm.com>
Cc: Phil Auld <pauld@redhat.com>
Link: https://lkml.kernel.org/r/245a606e1a42a558a310220312d9b6adb9159df6.1555085500.git.jpoimboe@redhat.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-14 19:18:46 +02:00
..
alpha alpha: Fix Eiger NR_IRQS to 128 2019-02-20 10:20:53 +01:00
arc arc: hsdk_defconfig: Enable CONFIG_BLK_DEV_RAM 2019-04-20 09:14:59 +02:00
arm ARM: iop: don't use using 64-bit DMA masks 2019-05-08 07:20:51 +02:00
arm64 arm64: futex: Bound number of LDXR/STXR loops in FUTEX_WAKE_OP 2019-05-10 17:53:15 +02:00
blackfin pinctrl: adi2: Fix Kconfig build problem 2017-12-20 10:10:34 +01:00
c6x License cleanup: add SPDX license identifier to uapi header files with a license 2017-11-02 11:20:11 +01:00
cris bug.h: work around GCC PR82365 in BUG() 2018-05-30 07:52:00 +02:00
frv License cleanup: add SPDX license identifier to uapi header files with a license 2017-11-02 11:20:11 +01:00
h8300 h8300: use cc-cross-prefix instead of hardcoding h8300-unknown-linux- 2019-04-05 22:31:25 +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: Add -ffreestanding to CFLAGS 2019-03-23 14:35:21 +01:00
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: KGDB: fix kgdb support for SMP platforms. 2019-05-10 17:53:09 +02:00
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: regs_return_value() should return gpr28 2019-04-17 08:37:52 +02:00
powerpc powerpc/speculation: Support 'mitigations=' cmdline option 2019-05-14 19:18:46 +02:00
s390 s390: limit brk randomization to 32MB 2019-05-04 09:15:18 +02:00
score License cleanup: add SPDX license identifier to uapi header files with no license 2017-11-02 11:19:54 +01:00
sh sh: fix multiple function definition build errors 2019-05-08 07:20:51 +02:00
sparc sparc64: Make proc_id signed. 2018-11-13 11:14:50 -08:00
tile fcntl: don't cap l_start and l_end values for F_GETLK64 in compat syscall 2017-12-17 15:07:59 +01:00
um um: Avoid marking pages with "changed protection" 2019-02-12 19:46:08 +01:00
unicore32 kmemcheck: stop using GFP_NOTRACK and SLAB_NOTRACK 2018-02-22 15:42:23 +01:00
x86 x86/speculation: Support 'mitigations=' cmdline option 2019-05-14 19:18:46 +02:00
xtensa xtensa: fix return_address 2019-04-17 08:37:54 +02:00
.gitignore
Kconfig compiler.h: Allow arch-specific asm/compiler.h 2018-11-04 14:52:46 +01:00