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3aff47c062
linux/arch/mips
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James Hogan 3aff47c062 MIPS: Flush RPS on kernel entry with EVA 
When EVA is enabled, flush the Return Prediction Stack (RPS) present on
some MIPS cores on entry to the kernel from user mode.

This is important specifically for interAptiv with EVA enabled,
otherwise kernel mode RPS mispredicts may trigger speculative fetches of
user return addresses, which may be sensitive in the kernel address
space due to EVA's overlapping user/kernel address spaces.

Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Markos Chandras <markos.chandras@imgtec.com>
Cc: Leonid Yegoshin <leonid.yegoshin@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: <stable@vger.kernel.org> # 3.15.x-
Patchwork: https://patchwork.linux-mips.org/patch/10812/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2015-08-03 10:29:11 +02:00
..
alchemy MIPS: Alchemy: Remove unneeded cast removing const 2015-06-21 21:53:46 +02:00
ar7 MIPS: AR7: Replace mac address parsing 2015-04-02 13:54:22 +02:00
ath25 Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2015-07-01 15:19:35 -07:00
ath79 MIPS: Export get_c0_perfcount_int() 2015-08-03 09:25:18 +02:00
bcm47xx MIPS: BCM47xx: Simplify handling SPROM revisions 2015-06-21 22:19:59 +02:00
bcm63xx This is the final removal (after several years!) of the obsolete cpus_* 2015-04-20 10:19:03 -07:00
bmips MIPS: BMIPS: Accept UHI interface for passing a dtb 2015-06-21 21:54:17 +02:00
boot MIPS: Malta: Basic DT plumbing 2015-06-21 21:54:29 +02:00
cavium-octeon MIPS: SMP: Don't increment irq_count multiple times for call function IPIs 2015-08-03 09:25:12 +02:00
cobalt MIPS: Cobalt Don't use module_init in non-modular MTD registration. 2015-06-21 22:14:30 +02:00
configs MIPS: Loongson: Naming style cleanup and rework 2015-06-21 21:53:59 +02:00
dec MIPS: DEC: Do not set up the FPU interrupt if no FPU 2015-04-08 01:10:46 +02:00
emma
fw MIPS: ARC: Use __noreturn / unreachable in ARC termination functions. 2015-01-13 16:04:27 +01:00
include MIPS: Flush RPS on kernel entry with EVA 2015-08-03 10:29:11 +02:00
jazz
jz4740 MIPS: ingenic: Initial MIPS Creator CI20 support 2015-06-21 21:53:28 +02:00
kernel MIPS: show_stack: Fix stack trace with EVA 2015-08-03 09:25:17 +02:00
kvm The bulk of the changes here is for x86. And for once it's not 2015-06-24 09:36:49 -07:00
lantiq MIPS: Export get_c0_perfcount_int() 2015-08-03 09:25:18 +02:00
lasat Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2015-04-17 15:50:54 -04:00
lib MIPS: tlb-r3k: Move CP0.Wired register initialisation to `tlb_init' 2015-06-21 21:52:41 +02:00
loongson32 MIPS: Loongson: Naming style cleanup and rework 2015-06-21 21:53:59 +02:00
loongson64 MIPS: SMP: Don't increment irq_count multiple times for call function IPIs 2015-08-03 09:25:12 +02:00
math-emu MIPS: Fix erroneous JR emulation for MIPS R6 2015-07-09 11:11:43 +02:00
mm MIPS: Partially disable RIXI support. 2015-08-03 09:25:11 +02:00
mti-malta MIPS: Export get_c0_perfcount_int() 2015-08-03 09:25:18 +02:00
mti-sead3 MIPS: Export get_c0_perfcount_int() 2015-08-03 09:25:18 +02:00
net MIPS: BPF: Introduce BPF ASM helpers 2015-06-21 21:54:25 +02:00
netlogic MIPS: SMP: Don't increment irq_count multiple times for call function IPIs 2015-08-03 09:25:12 +02:00
oprofile MIPS: Add R16000 detection 2015-04-01 17:22:13 +02:00
paravirt MIPS: SMP: Don't increment irq_count multiple times for call function IPIs 2015-08-03 09:25:12 +02:00
pci Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2015-07-01 15:19:35 -07:00
pistachio MIPS: Export get_c0_perfcount_int() 2015-08-03 09:25:18 +02:00
pmcs-msp71xx MIPS: SMP: Don't increment irq_count multiple times for call function IPIs 2015-08-03 09:25:12 +02:00
pnx833x
power MIPS: Hibernate: flush TLB entries earlier 2015-04-10 15:41:52 +02:00
ralink MIPS: Export get_c0_perfcount_int() 2015-08-03 09:25:18 +02:00
rb532 MIPS: Replace use of phys_t with phys_addr_t. 2014-11-24 22:47:31 +01:00
sgi-ip22 MIPS: ip22-gio: Remove legacy suspend/resume support 2015-02-20 13:30:55 +01:00
sgi-ip27 MIPS: SMP: Don't increment irq_count multiple times for call function IPIs 2015-08-03 09:25:12 +02:00
sgi-ip32 MIPS: IP32: Fix build errors in reset code in DS1685 platform hook. 2015-05-13 00:01:41 +02:00
sibyte MIPS: SMP: Don't increment irq_count multiple times for call function IPIs 2015-08-03 09:25:12 +02:00
sni
txx9 MIPS/IRQCHIP: Move irq_chip from arch/mips to drivers/irqchip. 2015-06-21 21:52:50 +02:00
vr41xx MIPS/IRQCHIP: Move irq_chip from arch/mips to drivers/irqchip. 2015-06-21 21:52:50 +02:00
Kbuild
Kbuild.platforms MIPS: Loongson: Naming style cleanup and rework 2015-06-21 21:53:59 +02:00
Kconfig MIPS: BMIPS: Delete unused Kconfig symbol 2015-08-03 10:11:14 +02:00
Kconfig.debug MIPS: kernel: elf: Improve the overall ABI and FPU mode checks 2015-02-17 15:37:39 +00:00
Makefile MIPS: SB1: Remove support for Pass 1 parts. 2015-07-14 21:47:34 +02:00