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Josh Poimboeuf 59a14fb583 s390/speculation: Support 'mitigations=' cmdline option 
commit 0336e04a65 upstream

Configure s390 runtime CPU speculation bug mitigations in accordance
with the 'mitigations=' cmdline option.  This affects Spectre v1 and
Spectre v2.

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/e4a161805458a5ec88812aac0307ae3908a030fc.1555085500.git.jpoimboe@redhat.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-14 19:17:59 +02:00
..
appldata s390/appldata: reuse generic proc handler functions 2018-07-06 08:48:08 +02:00
boot s390/decompressor: add missing FORCE to build targets 2018-11-27 16:13:02 +01:00
configs s390: update defconfigs 2018-04-27 06:51:31 +02:00
crypto s390/crypto: Fix return code checking in cbc_paes_crypt() 2018-09-04 10:58:17 +02:00
hypfs s390/hypfs: Replace PTR_RET with PTR_ERR_OR_ZERO 2018-07-19 16:37:36 +02:00
include s390: limit brk randomization to 32MB 2019-05-04 09:20:11 +02:00
kernel s390/speculation: Support 'mitigations=' cmdline option 2019-05-14 19:17:59 +02:00
kvm KVM: s390: Make huge pages unavailable in ucontrol VMs 2018-09-12 14:46:37 +02:00
lib s390/lib: use expoline for all bcr instructions 2018-08-07 13:38:13 +02:00
mm s390/mm: fix mis-accounting of pgtable_bytes 2018-11-27 16:13:03 +01:00
net Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux 2018-08-13 19:07:17 -07:00
numa s390/mm: Fix ERROR: "__node_distance" undefined! 2018-11-27 16:13:03 +01:00
oprofile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
pci s390/pci: fix sleeping in atomic during hotplug 2019-01-09 17:38:41 +01:00
purgatory Kbuild updates for v4.19 2018-08-15 12:09:03 -07:00
scripts s390/build: add *.o.chkbss files to targets list 2018-07-02 12:32:23 +02:00
tools Minor code cleanups for PPC. 2018-08-19 10:38:36 -07:00
defconfig crypto: speck - remove Speck 2018-11-13 11:08:46 -08:00
Kbuild s390/kexec_file: Add purgatory 2018-04-16 09:10:22 +02:00
Kconfig Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux 2018-08-24 09:31:34 -07:00
Kconfig.debug Kconfig: consolidate the "Kernel hacking" menu 2018-08-02 08:06:48 +09:00
Makefile kbuild: rename LDFLAGS to KBUILD_LDFLAGS 2018-08-24 08:22:08 +09:00