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4b34cdde90
linux/arch/mips
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Lars Persson 4b34cdde90 MIPS: Remove race window in page fault handling 
Multicore MIPSes without I/D hardware coherency suffered from a race
condition in the page fault handler. The page table entry was
published before any pending lazy D-cache flush was committed, hence
it allowed execution of stale page cache data by other VPEs in the
system.

To make the cache handling safe we need to perform flushing already in
the set_pte_at function. MIPSes without coherent I-caches can get a
small increase in flushes due to the unavailability of the execute
flag in set_pte_at.

[ralf@linux-mips.org: outlining set_pte_at() saves a good k in a test
build, so I moved its definition from pgtable.h to cache.c.]

Signed-off-by: Lars Persson <larper@axis.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/7511/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2014-08-26 02:18:54 +02:00
..
alchemy MIPS: Alchemy: Fix db1200 PSC clock enablement 2014-08-26 02:18:53 +02:00
ar7 MIPS: Restore init.h usage to arch/mips/ar7/time.c 2014-03-26 23:09:23 +01:00
ath79 usb: host: remove selects of USB_ARCH_HAS_?HCI 2014-02-18 12:36:38 -08:00
bcm47xx MIPS: BCM47XX: Fix reboot problem on BCM4705/BCM4785 2014-08-26 02:18:53 +02:00
bcm63xx MIPS: BCM63xx: Allow setting affinity for IPIC 2014-07-30 15:30:23 +02:00
boot MIPS: ZBOOT: implement stack protector in compressed boot phase 2014-08-02 00:06:46 +02:00
cavium-octeon MIPS: Add common plat_irq_dispatch declaration 2014-08-26 02:18:52 +02:00
cobalt MIPS: Cobalt: Move to 8250/16550 serial early printk driver 2013-10-29 21:24:38 +01:00
configs Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2014-08-07 08:47:00 -07:00
dec Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2014-06-09 18:10:34 -07:00
emma MIPS: Remove panic_timeout settings 2013-11-26 12:12:27 +01:00
fw MIPS: DEC/SNI: O32 wrapper stack switching fixes 2014-05-13 00:29:35 +02:00
include MIPS: Remove race window in page fault handling 2014-08-26 02:18:54 +02:00
jazz
jz4740 This is the bulk of GPIO changes for the v3.17 development 2014-08-08 18:00:35 -07:00
kernel MIPS: perf: Mark pmu interupt IRQF_NO_THREAD 2014-08-26 02:18:51 +02:00
kvm Patch queue for ppc - 2014-08-01 2014-08-05 09:58:11 +02:00
lantiq Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2014-06-09 18:10:34 -07:00
lasat MIPS: Lasat: Replace del_timer by del_timer_sync 2014-03-31 18:17:12 +02:00
lib MIPS: __delay ABI-dependent subtraction simplification 2014-05-30 21:01:08 +02:00
loongson MIPS: Remove duplicated include from numa.c 2014-08-26 02:18:53 +02:00
loongson1 MIPS: Disable MIPS16/microMIPS crap for platforms not supporting these ASEs. 2014-05-23 15:12:37 +02:00
math-emu MIPS: math-emu: Fix instruction decoding. 2014-07-30 19:13:35 +02:00
mm MIPS: Remove race window in page fault handling 2014-08-26 02:18:54 +02:00
mti-malta MIPS: Malta: Improve system memory detection for '{e, }memsize' >= 2G 2014-08-26 02:18:54 +02:00
mti-sead3 Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2014-06-09 18:10:34 -07:00
net net: filter: split 'struct sk_filter' into socket and bpf parts 2014-08-02 15:03:58 -07:00
netlogic Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2014-06-09 18:10:34 -07:00
oprofile MIPS: Add support for the M5150 processor 2014-03-26 23:09:22 +01:00
paravirt mips: Update the email address of Geert Uytterhoeven 2014-06-02 16:34:41 +02:00
pci MIPS: Loongson: Rename CONFIG_LEMOTE_MACH3A to CONFIG_LOONGSON_MACH3X 2014-07-30 21:47:33 +02:00
pmcs-msp71xx MIPS: MSP71xx: remove unused plat_irq_dispatch() argument 2014-08-26 02:18:52 +02:00
pnx833x MIPS: PNX833x: Remove checks for CONFIG_I2C_PNX0105 2014-05-23 15:12:39 +02:00
power MIPS: Hibernate: Flush TLB entries in swsusp_arch_resume() 2014-03-31 10:16:53 +02:00
ralink MIPS: ralink: Use strlcpy to ensure string is always NUL-terminated. 2014-07-30 14:42:21 +02:00
rb532 Merge branch '3.16-fixes' into mips-for-linux-next 2014-08-02 00:07:03 +02:00
sgi-ip22 MIPS: IP22: Add missing put_device call 2014-07-30 13:27:51 +02:00
sgi-ip27 MIPS: SMP: Remove plat_smp_ops cpus_done method. 2014-05-27 11:06:42 +02:00
sgi-ip32
sibyte MIPS: SMP: Remove plat_smp_ops cpus_done method. 2014-05-27 11:06:42 +02:00
sni
txx9 Merge branch '3.16-fixes' into mips-for-linux-next 2014-08-02 00:07:03 +02:00
vr41xx
Kbuild MIPS: net: Add BPF JIT 2014-05-30 16:10:20 +02:00
Kbuild.platforms MIPS: Enable build for new system 'paravirt' 2014-06-02 12:34:20 +02:00
Kconfig kexec: load and relocate purgatory at kernel load time 2014-08-08 15:57:32 -07:00
Kconfig.debug MIPS: MT: Remove SMTC support 2014-05-24 00:07:01 +02:00
Makefile MIPS: SB1: Check optional compilation flags one by one 2014-07-30 15:53:49 +02:00