Markos Chandras ed4cbc81ad MIPS: HTW: Prevent accidental HTW start due to nested htw_{start, stop} ... activate_mm() and switch_mm() call get_new_mmu_context() which in turn can enable the HTW before the entryhi is changed with the new ASID. Since the latter will enable the HTW in local_flush_tlb_all(), then there is a small timing window where the HTW is running with the new ASID but with an old pgd since the TLBMISS_HANDLER_SETUP_PGD hasn't assigned a new one yet. In order to prevent that, we introduce a simple htw counter to avoid starting HTW accidentally due to nested htw_{start,stop}() sequences. Moreover, since various IPI calls can enforce TLB flushing operations on a different core, such an operation may interrupt another htw_{stop,start} in progress leading inconsistent updates of the htw_seq variable. In order to avoid that, we disable the interrupts whenever we update that variable. Signed-off-by: Markos Chandras <markos.chandras@imgtec.com> Cc: <stable@vger.kernel.org> # 3.17+ Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/9118/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>		2015-02-16 10:55:26 +01:00
..
alchemy	Please consider pulling the clk framework changes toward 3.19. It is	2014-12-20 16:42:36 -08:00
ar7	mips: Convert pr_warning to pr_warn	2014-11-24 07:44:51 +01:00
ath25	MIPS: ath25: add Wireless device support	2014-11-24 07:45:29 +01:00
ath79	MIPS: ath79: Read the initrd address from the firmware environment	2014-11-24 07:45:30 +01:00
bcm47xx	MIPS: BCM47XX: Clean up nvram header	2014-11-24 07:45:08 +01:00
bcm63xx	MIPS: Remove useless parentheses	2014-11-24 07:44:49 +01:00
bcm3384	MIPS: bcm3384: Initial commit of bcm3384 platform support	2014-11-24 07:45:13 +01:00
boot	MIPS: elf2ecoff: Fix warning due to dead code.	2015-02-04 14:42:27 +01:00
cavium-octeon	USB patches for 3.19-rc1	2014-12-14 14:57:16 -08:00
cobalt	MIPS: Cobalt: Move to 8250/16550 serial early printk driver	2013-10-29 21:24:38 +01:00
configs	PM: Eliminate CONFIG_PM_RUNTIME	2014-12-19 22:55:06 +01:00
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: ARC: Use __noreturn / unreachable in ARC termination functions.	2015-01-13 16:04:27 +01:00
include	MIPS: HTW: Prevent accidental HTW start due to nested htw_{start, stop}	2015-02-16 10:55:26 +01:00
jazz	Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus	2013-03-02 07:44:16 -08:00
jz4740	MIPS: Replace use of phys_t with phys_addr_t.	2014-11-24 22:47:31 +01:00
kernel	MIPS: HTW: Prevent accidental HTW start due to nested htw_{start, stop}	2015-02-16 10:55:26 +01:00
kvm	KVM: remove garbage arg to *hardware_{en,dis}able	2014-08-29 16:35:55 +02:00
lantiq	Driver core patches for 3.19-rc1	2014-12-14 16:10:09 -08:00
lasat	MIPS: Lasat: Add missing CONFIG_PROC_FS dependency to PICVUE_PROC	2014-10-21 17:35:44 +02:00
lib	MIPS: lib: memset: Clean up some MIPS{EL,EB} ifdefery	2014-11-24 07:45:42 +01:00
loongson	Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus	2014-12-11 17:56:37 -08:00
loongson1	MIPS: Loongson1B: Add a clockevent/clocksource using PWM Timer	2014-11-24 07:45:09 +01:00
math-emu	MIPS: Support for hybrid FPRs	2014-11-24 07:45:07 +01:00
mm	MIPS: mm: Add debug information for userland SIGSEGV signals.	2015-02-16 10:55:26 +01:00
mti-malta	MIPS: Replace use of phys_t with phys_addr_t.	2014-11-24 22:47:31 +01:00
mti-sead3	Driver core patches for 3.19-rc1	2014-12-14 16:10:09 -08:00
net	mips: bpf: Fix broken BPF_MOD	2014-12-08 20:22:30 -05:00
netlogic	MIPS: Netlogic: handle modular AHCI builds	2014-11-24 07:44:06 +01:00
oprofile	MIPS: oprofile: Backtrace: don't fail on leaf functions	2014-11-24 07:45:31 +01:00
paravirt	mips: Update the email address of Geert Uytterhoeven	2014-06-02 16:34:41 +02:00
pci	MIPS: Add struct pci_ops member names to initialization	2015-01-16 15:04:38 +01:00
pmcs-msp71xx	MIPS: Remove useless parentheses	2014-11-24 07:44:49 +01:00
pnx833x	MIPS: PNX833x: Remove checks for CONFIG_I2C_PNX0105	2014-05-23 15:12:39 +02:00
power	nosave: consolidate __nosave_{begin,end} in <asm/sections.h>	2014-10-09 22:26:04 -04:00
ralink	Driver core patches for 3.19-rc1	2014-12-14 16:10:09 -08:00
rb532	MIPS: Replace use of phys_t with phys_addr_t.	2014-11-24 22:47:31 +01:00
sgi-ip22	MIPS: Remove useless parentheses	2014-11-24 07:44:49 +01:00
sgi-ip27	MIPS: IP27: Use __noreturn instead of open coded attributes in declarations.	2015-01-13 16:04:28 +01:00
sgi-ip32	MIPS: IP32: Use __noreturn instead of open coded attributes in declarations.	2015-01-13 16:04:28 +01:00
sibyte	MIPS: Replace use of phys_t with phys_addr_t.	2014-11-24 22:47:31 +01:00
sni	MIPS: Cleanup CP0 PRId and CP1 FPIR register access masks	2013-09-18 20:25:19 +02:00
txx9	Driver core patches for 3.19-rc1	2014-12-14 16:10:09 -08:00
vr41xx	MIPS: Idle: Consolidate all declarations in <asm/idle.h>.	2013-05-22 01:34:27 +02:00
Kbuild	MIPS: net: Add BPF JIT	2014-05-30 16:10:20 +02:00
Kbuild.platforms	MIPS: ath25: add common parts	2014-11-24 07:45:26 +01:00
Kconfig	MIPS: mm: Add debug information for userland SIGSEGV signals.	2015-02-16 10:55:26 +01:00
Kconfig.debug	MIPS: Kconfig option to better exercise/debug hybrid FPRs	2014-11-24 07:45:08 +01:00
Makefile	MIPS: IP22/IP32: Add line to arch/mips/Makefile archhelp about vmlinux.32	2014-11-24 07:45:33 +01:00