Dmitry Korotin 377bea4090 MIPS: Add missing EHB in mtc0 -> mfc0 sequence. ... commit 0b24cae4d5 upstream. Add a missing EHB (Execution Hazard Barrier) in mtc0 -> mfc0 sequence. Without this execution hazard barrier it's possible for the value read back from the KScratch register to be the value from before the mtc0. Reproducible on P5600 & P6600. The hazard is documented in the MIPS Architecture Reference Manual Vol. III: MIPS32/microMIPS32 Privileged Resource Architecture (MD00088), rev 6.03 table 8.1 which includes: Producer | Consumer | Hazard ----------|----------|---------------------------- mtc0 | mfc0 | any coprocessor 0 register Signed-off-by: Dmitry Korotin <dkorotin@wavecomp.com> [paul.burton@mips.com: - Commit message tweaks. - Add Fixes tags. - Mark for stable back to v3.15 where P5600 support was introduced.] Signed-off-by: Paul Burton <paul.burton@mips.com> Fixes: 3d8bfdd030 ("MIPS: Use C0_KScratch (if present) to hold PGD pointer.") Fixes: 829dcc0a95 ("MIPS: Add MIPS P5600 probe support") Cc: linux-mips@vger.kernel.org Cc: stable@vger.kernel.org # v3.15+ Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2019-07-10 09:54:43 +02:00
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alpha
arc	ARC: handle gcc generated __builtin_trap for older compiler	2019-07-10 09:54:42 +02:00
arm	ARM: dts: am57xx-idk: Remove support for voltage switching for SD card	2019-06-25 11:36:54 +08:00
arm64	arm64: kaslr: keep modules inside module region when KASAN is enabled	2019-07-10 09:54:40 +02:00
blackfin
c6x
cris
frv
h8300	h8300: use cc-cross-prefix instead of hardcoding h8300-unknown-linux-	2019-04-05 22:31:25 +02:00
hexagon
ia64	ia64: fix build errors by exporting paddr_to_nid()	2019-06-22 08:16:17 +02:00
m32r
m68k	m68k: Add -ffreestanding to CFLAGS	2019-03-23 14:35:21 +01:00
metag
microblaze
mips	MIPS: Add missing EHB in mtc0 -> mfc0 sequence.	2019-07-10 09:54:43 +02:00
mn10300
nios2
openrisc
parisc	parisc: Fix compiler warnings in float emulation code	2019-06-25 11:36:51 +08:00
powerpc	powerpc/bpf: use unsigned division instruction for 64-bit operations	2019-06-25 11:36:54 +08:00
s390	KVM: s390: fix memory slot handling for KVM_SET_USER_MEMORY_REGION	2019-06-19 08:20:58 +02:00
score
sh	sh: fix multiple function definition build errors	2019-05-08 07:20:51 +02:00
sparc	sparc: perf: fix updated event period in response to PERF_EVENT_IOC_PERIOD	2019-06-25 11:36:52 +08:00
tile
um	uml: fix a boot splat wrt use of cpu_all_mask	2019-06-15 11:54:53 +02:00
unicore32
x86	KVM: LAPIC: Fix pending interrupt in IRR blocked by software disable LAPIC	2019-07-10 09:54:43 +02:00
xtensa	xtensa: Fix section mismatch between memblock_reserve and mem_reserve	2019-06-25 11:36:52 +08:00
.gitignore
Kconfig