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Diana Craciun 42b46e985c powerpc/fsl: Flush the branch predictor at each kernel entry (32 bit) 
commit 7fef436295bf6c05effe682c8797dfcb0deb112a upstream.

In order to protect against speculation attacks on
indirect branches, the branch predictor is flushed at
kernel entry to protect for the following situations:
- userspace process attacking another userspace process
- userspace process attacking the kernel
Basically when the privillege level change (i.e.the kernel
is entered), the branch predictor state is flushed.

Signed-off-by: Diana Craciun <diana.craciun@nxp.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-16 19:44:53 +02:00
..
alpha
alpha: Fix Eiger NR_IRQS to 128
2019-02-20 10:13:22 +01:00
arc
ARC: uacces: remove lp_start, lp_end from clobber list
2019-03-23 08:44:34 +01:00
arm
ARM: 8839/1: kprobe: make patch_lock a raw_spinlock_t
2019-04-27 09:33:59 +02:00
arm64
arm64: futex: Restore oldval initialization to work around buggy compilers
2019-04-27 09:34:01 +02:00
avr32
avr32: off by one in at32_init_pio()
2016-10-07 15:23:45 +02:00
blackfin
pinctrl: adi2: Fix Kconfig build problem
2017-12-20 10:05:00 +01:00
c6x
c6x/ptrace: Remove useless PTRACE_SETREGSET implementation
2017-03-31 09:49:53 +02:00
cris
mm: replace get_user_pages() write/force parameters with gup_flags
2018-12-17 21:55:16 +01:00
frv
futex: Remove duplicated code and fix undefined behaviour
2018-05-26 08:48:50 +02:00
h8300
h8300: use cc-cross-prefix instead of hardcoding h8300-unknown-linux-
2019-04-27 09:33:48 +02:00
hexagon
hexagon: modify ffs() and fls() to return int
2018-10-10 08:52:12 +02:00
ia64
mm: replace get_user_pages() write/force parameters with gup_flags
2018-12-17 21:55:16 +01:00
m32r
m32r: fix __get_user()
2016-09-24 10:07:43 +02:00
m68k
m68k: Add -ffreestanding to CFLAGS
2019-03-23 08:44:36 +01:00
metag
metag/uaccess: Check access_ok in strncpy_from_user
2017-05-25 14:30:16 +02:00
microblaze
microblaze: Fix simpleImage format generation
2018-08-06 16:24:39 +02:00
mips
MIPS: scall64-o32: Fix indirect syscall number load
2019-05-16 19:44:43 +02:00
mn10300
mn10300/misalignment: Use SIGSEGV SEGV_MAPERR to report a failed user copy
2018-02-16 20:09:47 +01:00
nios2
nios2: reserve boot memory for device tree
2017-04-12 12:38:34 +02:00
openrisc
kthread: fix boot hang (regression) on MIPS/OpenRISC
2018-09-19 22:48:55 +02:00
parisc
parisc: Fix map_pages() to not overwrite existing pte entries
2018-11-21 09:27:30 +01:00
powerpc
powerpc/fsl: Flush the branch predictor at each kernel entry (32 bit)
2019-05-16 19:44:53 +02:00
s390
s390/smp: Fix calling smp_call_ipl_cpu() from ipl CPU
2019-02-06 19:43:05 +01:00
score
score: fix copy_from_user() and friends
2016-09-24 10:07:44 +02:00
sh
mm: replace get_user_pages_unlocked() write/force parameters with gup_flags
2018-12-17 21:55:16 +01:00
sparc
mm: replace get_user_pages_unlocked() write/force parameters with gup_flags
2018-12-17 21:55:16 +01:00
tile
futex: Remove duplicated code and fix undefined behaviour
2018-05-26 08:48:50 +02:00
um
um: Avoid marking pages with "changed protection"
2019-02-20 10:13:13 +01:00
unicore32
pwm: Changes for v4.4-rc1
2015-11-11 09:16:10 -08:00
x86
KVM: fail KVM_SET_VCPU_EVENTS with invalid exception number
2019-05-16 19:44:43 +02:00
xtensa
xtensa: fix return_address
2019-04-27 09:33:56 +02:00
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