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linux/arch/mips/kernel
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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
..
.gitignore
8250-platform.c
asm-offsets.c MIPS: save/restore MSACSR register on context switch 2014-08-02 00:06:43 +02:00
binfmt_elfn32.c MIPS: Compat: Fix cputime_to_timeval() arguments in compat binfmt_elf. 2013-06-06 16:11:26 +02:00
binfmt_elfo32.c MIPS: Remove old core dump functions 2014-08-02 00:06:37 +02:00
bmips_vec.S MIPS: BMIPS: Fix ".previous without corresponding .section" warnings 2014-11-24 07:44:05 +01:00
branch.c MIPS: Fix build with binutils 2.24.51+ 2014-11-07 15:07:36 +01:00
cevt-bcm1480.c MIPS: Delete __cpuinit/__CPUINIT usage from MIPS code 2013-07-14 19:36:51 -04:00
cevt-ds1287.c MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
cevt-gt641xx.c MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
cevt-r4k.c MIPS: cevt-r4k: Drop GIC special case 2015-02-05 14:56:53 +01:00
cevt-sb1250.c MIPS: Delete __cpuinit/__CPUINIT usage from MIPS code 2013-07-14 19:36:51 -04:00
cevt-txx9.c MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
cps-vec.S MIPS: kernel: cps-vec: Set ISA level to mips32r2 for the MIPS MT ASE 2014-11-24 07:44:06 +01:00
cpu-bugs64.c MIPS: Delete __cpuinit/__CPUINIT usage from MIPS code 2013-07-14 19:36:51 -04:00
cpu-probe.c MIPS: HTW: Prevent accidental HTW start due to nested htw_{start, stop} 2015-02-16 10:55:26 +01:00
crash_dump.c mips: Convert pr_warning to pr_warn 2014-11-24 07:44:51 +01:00
crash.c mips: delete non-required instances of include <linux/init.h> 2014-01-24 22:39:56 +01:00
csrc-bcm1480.c MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
csrc-ioasic.c MIPS: DECstation HRT initialization rearrangement 2013-09-13 11:56:13 +02:00
csrc-r4k.c
csrc-sb1250.c MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
early_printk_8250.c MIPS: Add 8250/16550 serial early printk driver 2013-10-29 21:24:36 +01:00
early_printk.c early_printk: consolidate random copies of identical code 2013-04-29 18:28:13 -07:00
elf.c MIPS: Kconfig option to better exercise/debug hybrid FPRs 2014-11-24 07:45:08 +01:00
entry.S MIPS: MT: Remove SMTC support 2014-05-24 00:07:01 +02:00
ftrace.c Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2014-08-07 08:47:00 -07:00
genex.S MIPS: Fix build with binutils 2.24.51+ 2014-11-07 15:07:36 +01:00
gpio_txx9.c
head.S MIPS: MT: Remove SMTC support 2014-05-24 00:07:01 +02:00
i8253.c
i8259.c MIPS: i8259: Use IRQ domains 2014-11-24 07:44:52 +01:00
idle.c MIPS: idle: Remove leftover __pastwait symbol and its references 2014-10-23 19:24:05 +02:00
irq_cpu.c MIPS: Set vint handler when mapping CPU interrupts 2014-11-24 07:44:52 +01:00
irq_txx9.c MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
irq-gt641xx.c MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
irq-msc01.c MIPS: MSC: Prevent out-of-bounds writes to MIPS SC ioremap'd region 2014-06-26 10:48:23 +01:00
irq-rm7000.c MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
irq.c Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2014-06-09 18:10:34 -07:00
jump_label.c MIPS: jump_label.c: Handle the microMIPS J instruction encoding 2014-11-19 18:22:09 +01:00
kgdb.c MIPS: kernel: {ftrace,kgdb}: Set correct address limit for cache flushes 2014-03-26 23:09:18 +01:00
kprobes.c mips: Replace __get_cpu_var uses 2014-08-26 13:45:51 -04:00
linux32.c unify compat fanotify_mark(2), switch to COMPAT_SYSCALL_DEFINE 2013-05-09 13:46:38 -04:00
machine_kexec.c MIPS: kdump: Set correct value to kexec_indirection_page variable 2014-08-25 16:33:44 +02:00
Makefile clocksource: mips-gic: Combine with GIC clockevent driver 2014-11-24 07:45:15 +01:00
mcount.S MIPS: mcount: Adjust stack pointer for static trace in MIPS32 2014-09-26 11:41:17 +02:00
mips_ksyms.c MIPS: Remove __strlen_user(). 2014-11-24 07:45:00 +01:00
mips_machine.c MIPS: move mips_{set,get}_machine_name() to a more generic place 2013-05-08 01:19:07 +02:00
mips-cm.c MIPS: Replace use of phys_t with phys_addr_t. 2014-11-24 22:47:31 +01:00
mips-cpc.c MIPS: Replace use of phys_t with phys_addr_t. 2014-11-24 22:47:31 +01:00
mips-mt-fpaff.c MIPS: MT: Remove SMTC support 2014-05-24 00:07:01 +02:00
mips-mt.c MIPS: MT: Remove SMTC support 2014-05-24 00:07:01 +02:00
module-rela.c MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
module.c MIPS: Use NUMA_NO_NODE instead of -1 for node ID. 2013-10-29 21:24:14 +01:00
octeon_switch.S MIPS: OCTEON: Enable use of FPU 2014-05-30 21:01:09 +02:00
perf_event_mipsxx.c MIPS: Add hook to get C0 performance counter interrupt 2014-11-24 07:44:53 +01:00
perf_event.c
pm-cps.c MIPS: {pm,smp}-cps: use cpu_vpe_id macro 2014-07-30 20:48:42 +02:00
pm.c MIPS: PM: Implement PM helper macros 2014-05-02 16:39:10 +01:00
proc.c MIPS: cpu: Add new cpu option for Hardware Table Walker. 2014-08-02 00:06:38 +02:00
process.c MIPS,prctl: add PR_[GS]ET_FP_MODE prctl options for MIPS 2015-02-12 12:30:29 +01:00
prom.c MIPS: Create a helper function for DT setup 2014-11-24 07:45:12 +01:00
ptrace32.c MIPS: Remove asm/user.h 2014-08-02 00:06:37 +02:00
ptrace.c Merge git://git.infradead.org/users/eparis/audit 2014-10-19 16:25:56 -07:00
r4k_fpu.S MIPS: Fix build with binutils 2.24.51+ 2014-11-07 15:07:36 +01:00
r4k_switch.S MIPS: Fix build with binutils 2.24.51+ 2014-11-07 15:07:36 +01:00
r2300_fpu.S MIPS: Fix build with binutils 2.24.51+ 2014-11-07 15:07:36 +01:00
r2300_switch.S MIPS: Fix build with binutils 2.24.51+ 2014-11-07 15:07:36 +01:00
r6000_fpu.S MIPS: Fix build with binutils 2.24.51+ 2014-11-07 15:07:36 +01:00
relocate_kernel.S MIPS: kdump: Skip walking indirection page for crashkernels 2013-09-05 20:53:37 +02:00
reset.c
rtlx-cmp.c MIPS: APRP: Fix an issue when device_create() fails. 2014-08-01 17:30:35 +02:00
rtlx-mt.c MIPS: APRP: Fix an issue when device_create() fails. 2014-08-01 17:30:35 +02:00
rtlx.c MIPS: rtlx: Remove KERN_DEBUG from pr_debug() arguments in rtlx.c 2014-11-24 07:44:04 +01:00
scall32-o32.S MIPS: Wire up bpf syscall. 2014-10-27 03:37:42 +01:00
scall64-64.S MIPS: Wire up bpf syscall. 2014-10-27 03:37:42 +01:00
scall64-n32.S MIPS: Wire up bpf syscall. 2014-10-27 03:37:42 +01:00
scall64-o32.S MIPS: Wire up bpf syscall. 2014-10-27 03:37:42 +01:00
segment.c MIPS: Add debugfs file to print the segmentation control registers 2014-01-22 20:19:00 +01:00
setup.c MIPS: Use phys_addr_t instead of phys_t 2014-12-12 15:36:13 -08:00
signal32.c mips: Use sigsp() 2014-08-06 13:04:30 +02:00
signal_n32.c mips: Use sigsp() 2014-08-06 13:04:30 +02:00
signal-common.h mips: Use get_signal() signal_setup_done() 2014-08-06 13:03:08 +02:00
signal.c Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2014-12-11 17:56:37 -08:00
smp-bmips.c MIPS: BMIPS: Let each platform customize the CPU1 IRQ mask 2014-11-24 07:45:11 +01:00
smp-cmp.c MIPS: Move gic.h to include/linux/irqchip/mips-gic.h 2014-11-24 07:44:59 +01:00
smp-cps.c MIPS: Move gic.h to include/linux/irqchip/mips-gic.h 2014-11-24 07:44:59 +01:00
smp-gic.c MIPS: Move gic.h to include/linux/irqchip/mips-gic.h 2014-11-24 07:44:59 +01:00
smp-mt.c MIPS: Move gic.h to include/linux/irqchip/mips-gic.h 2014-11-24 07:44:59 +01:00
smp-up.c MIPS: SMP: Remove plat_smp_ops cpus_done method. 2014-05-27 11:06:42 +02:00
smp.c MIPS: Support CPU topology files in sysfs 2014-07-30 21:45:39 +02:00
spinlock_test.c
spram.c MIPS: Use current_cpu_type() instead of c->cputype 2014-03-31 18:17:12 +02:00
stacktrace.c
sync-r4k.c MIPS: MT: Remove SMTC support 2014-05-24 00:07:01 +02:00
syscall.c MIPS: Apply `.insn' to fixup labels throughout 2014-11-24 07:45:36 +01:00
time.c MIPS: MT: Remove SMTC support 2014-05-24 00:07:01 +02:00
topology.c
traps.c MIPS,prctl: add PR_[GS]ET_FP_MODE prctl options for MIPS 2015-02-12 12:30:29 +01:00
unaligned.c MIPS: Remove BUG_ON(!is_fpu_owner()) in do_ade() 2014-07-30 21:30:22 +02:00
vdso.c MIPS: Enable VDSO randomization 2014-11-24 07:45:38 +01:00
vmlinux.lds.S MIPS: Discard .eh_frame sections in linker script. 2013-08-26 15:33:41 +02:00
vpe-cmp.c MIPS: APRP: Add VPE loader support for CMP platforms. 2014-01-22 20:19:02 +01:00
vpe-mt.c MIPS: MT: Remove SMTC support 2014-05-24 00:07:01 +02:00
vpe.c Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2014-01-30 17:20:32 -08:00
watch.c MIPS: Delete __cpuinit/__CPUINIT usage from MIPS code 2013-07-14 19:36:51 -04:00