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linux/arch/mips/kernel
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Matt Redfearn b2ed33a895
MIPS: pm-cps: Block system suspend when a JTAG probe is present 
If a JTAG probe is connected to a MIPS cluster, then the CPC detects it
and latches the CPC.STAT_CONF.EJTAG_PROBE bit to 1. While set,
attempting to send a power-down command to a core will be blocked, and
the CPC will instead send the core to clock-off state. This can
interfere with systems fully entering a low power state where all cores,
CM, GIC, etc are powered down.

Detect that a JTAG probe is / has been connected to the cluster and
block the suspend attempt.

Attempting to suspend the system while a JTAG probe is connected now
yields:
 # echo mem > /sys/power/state
 [   11.654000] PM: Syncing filesystems ... done.
 [   11.658000] JTAG probe is connected - abort suspend
 -sh: echo: write error: Operation not permitted
 #

To restore suspend, the JTAG probe should be disconnected or put into
quiescent state. Platform code can then clear the
CPC.STAT_CONF.EJTAG_PROBE bit.

Reported-by: Ed Blake <ed.blake@sondrel.com>
Signed-off-by: Matt Redfearn <matt.redfearn@mips.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Paul Burton <paul.burton@mips.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/18641/
Signed-off-by: James Hogan <jhogan@kernel.org>
2018-03-09 13:53:26 +00:00
..
.gitignore
…
8250-platform.c
…
asm-offsets.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
binfmt_elfn32.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
binfmt_elfo32.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
bmips_5xxx_init.S
MIPS: BMIPS: Make whitespacely correct.
2016-05-09 12:00:01 +02:00
bmips_vec.S
MIPS: BMIPS: Add Whirlwind (BMIPS5200) initialization code
2016-05-09 12:00:01 +02:00
branch.c
MIPS: Use proper kernel-doc Return keyword
2018-01-18 22:29:02 +00:00
cacheinfo.c
MIPS: Fix cacheinfo overflow
2017-02-13 18:57:34 +00:00
cevt-bcm1480.c
MIPS: clockevent drivers: Set ->min_delta_ticks and ->max_delta_ticks
2017-04-14 13:11:16 -07:00
cevt-ds1287.c
MIPS: clockevent drivers: Set ->min_delta_ticks and ->max_delta_ticks
2017-04-14 13:11:16 -07:00
cevt-gt641xx.c
MIPS: clockevent drivers: Set ->min_delta_ticks and ->max_delta_ticks
2017-04-14 13:11:16 -07:00
cevt-r4k.c
MIPS: cevt-r4k: Fix out-of-bounds array access
2017-04-10 13:31:12 +02:00
cevt-sb1250.c
MIPS: clockevent drivers: Set ->min_delta_ticks and ->max_delta_ticks
2017-04-14 13:11:16 -07:00
cevt-txx9.c
MIPS: clockevent drivers: Set ->min_delta_ticks and ->max_delta_ticks
2017-04-14 13:11:16 -07:00
cmpxchg.c
Update MIPS email addresses
2017-11-03 09:02:30 -07:00
cps-vec-ns16550.S
Update MIPS email addresses
2017-11-03 09:02:30 -07:00
cps-vec.S
MIPS: CPS: Fix MIPS_ISA_LEVEL_RAW fallout
2018-02-05 11:53:06 +00:00
cpu-bugs64.c
MIPS: Fix printk continuations in cpu-bugs64.c
2017-01-24 18:30:34 +01:00
cpu-probe.c
MIPS: Add crc instruction support flag to elf_hwcap
2018-02-19 20:50:35 +00:00
crash_dump.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
crash.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
csrc-bcm1480.c
clocksource: Use a plain u64 instead of cycle_t
2016-12-25 11:04:12 +01:00
csrc-ioasic.c
clocksource: Use a plain u64 instead of cycle_t
2016-12-25 11:04:12 +01:00
csrc-r4k.c
clocksource: Use a plain u64 instead of cycle_t
2016-12-25 11:04:12 +01:00
csrc-sb1250.c
clocksource: Use a plain u64 instead of cycle_t
2016-12-25 11:04:12 +01:00
early_printk_8250.c
…
early_printk.c
…
elf.c
Update MIPS email addresses
2017-11-03 09:02:30 -07:00
entry.S
MIPS: Fix IRQ tracing & lockdep when rescheduling
2017-06-30 04:40:18 +02:00
ftrace.c
MIPS: ftrace: Remove pointer comparison to 0 in prepare_ftrace_return
2018-01-18 21:59:24 +00:00
genex.S
MIPS: Add DWARF unwinding to assembly
2017-09-06 11:01:52 +02:00
gpio_txx9.c
MIPS: txx9: switch to gpiochip_add_data()
2016-02-19 09:51:44 +01:00
head.S
MIPS: head: Reorder instructions missing a delay slot
2017-06-27 23:35:21 +02:00
i8253.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
idle.c
MIPS: Include linux/cpu.h for arch_cpu_idle()
2017-08-29 15:21:54 +02:00
irq_txx9.c
…
irq-gt641xx.c
…
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
…
irq.c
MIPS: Introduce irq_stack
2017-01-03 16:34:34 +01:00
jump_label.c
jump_label: Reorder hotplug lock and jump_label_lock
2017-05-26 10:10:45 +02:00
kgdb.c
MIPS: KGDB: Use kernel context for sleeping threads
2017-04-12 22:29:22 +02:00
kprobes.c
MIPS: tracing: disable uprobe/kprobe on compact branch instructions
2016-10-06 17:37:40 +02:00
linux32.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
machine_kexec.c
MIPS: kexec: add debug info about the new kexec'ed image
2017-01-03 16:34:46 +01:00
Makefile
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
mcount.S
MIPS: Export _mcount alongside its definition
2017-01-03 16:34:49 +01:00
mips_machine.c
…
mips-cm.c
MIPS: CM: Drop WARN_ON(vp != 0)
2018-01-10 16:47:25 +01:00
mips-cpc.c
MIPS: CPC: Map registers using DT in mips_cpc_default_phys_base()
2018-02-08 14:02:01 +00:00
mips-mt-fpaff.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
mips-mt.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
mips-r2-to-r6-emul.c
MIPS: Declare various variables & functions static
2017-08-29 15:21:55 +02:00
module.c
Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus
2017-07-15 10:59:54 -07:00
octeon_switch.S
MIPS: Move r4k FP code from r4k_switch.S to r4k_fpu.S
2017-08-29 15:21:51 +02:00
perf_event_mipsxx.c
MIPS: Fix perf event init
2017-09-20 10:47:12 +02:00
perf_event.c
sched/headers: Prepare for new header dependencies before moving code to <linux/sched/task_stack.h>
2017-03-02 08:42:36 +01:00
pm-cps.c
MIPS: pm-cps: Block system suspend when a JTAG probe is present
2018-03-09 13:53:26 +00:00
pm.c
MIPS: Fix watchpoint restoration
2016-05-09 12:00:02 +02:00
probes-common.h
MIPS: Update email address for Marcin Nowakowski
2017-11-02 10:58:43 +00:00
proc.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
process.c
MIPS: Validate PR_SET_FP_MODE prctl(2) requests against the ABI of the task
2017-12-20 11:55:43 +01:00
prom.c
mips: remove arch specific early_init_dt_alloc_memory_arch
2018-01-30 11:15:55 -06:00
ptrace32.c
MIPS/ptrace: Update syscall nr on register changes
2017-11-09 15:13:58 +00:00
ptrace.c
MIPS: Disallow outsized PTRACE_SETREGSET NT_PRFPREG regset accesses
2017-12-12 19:14:12 +01:00
r4k_fpu.S
MIPS: Fix MIPS64 FP save/restore on 32-bit kernels
2017-11-09 14:13:40 +00:00
r4k_switch.S
MIPS: Move r4k FP code from r4k_switch.S to r4k_fpu.S
2017-08-29 15:21:51 +02:00
r2300_fpu.S
MIPS: Move r2300 FP code from r2300_switch.S to r2300_fpu.S
2017-08-29 15:21:51 +02:00
r2300_switch.S
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
relocate_kernel.S
MIPS: Replace add and sub instructions in relocate_kernel.S with addiu
2015-08-03 15:26:30 +02:00
relocate.c
Update MIPS email addresses
2017-11-03 09:02:30 -07:00
reset.c
MIPS: Hang more efficiently on halt/powerdown/restart
2018-03-09 11:22:43 +00:00
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
vfs: do bulk POLL* -> EPOLL* replacement
2018-02-11 14:34:03 -08:00
scall32-o32.S
MIPS: Remove pt_regs adjustments in indirect syscall handler
2017-08-29 15:48:34 +02:00
scall64-64.S
MIPS: Save static registers before sysmips
2017-06-28 12:22:40 +02:00
scall64-n32.S
MIPS: Save static registers before sysmips
2017-06-28 12:22:40 +02:00
scall64-o32.S
MIPS: Remove pt_regs adjustments in indirect syscall handler
2017-08-29 15:48:34 +02:00
segment.c
MIPS: Print segment physical address when EU=1
2016-07-28 11:44:30 +02:00
setup.c
MIPS: Remove a warning when PHYS_OFFSET is 0x0
2018-02-19 10:55:38 +00:00
signal32.c
signal: Unify and correct copy_siginfo_to_user32
2018-01-15 19:56:20 -06:00
signal_n32.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
signal_o32.c
sched/headers: Prepare for new header dependencies before moving code to <linux/sched/signal.h>
2017-03-02 08:42:29 +01:00
signal-common.h
MIPS: Save MSA extended context around signals
2015-09-03 12:07:59 +02:00
signal.c
Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus
2016-08-06 09:13:11 -04:00
smp-bmips.c
MIPS: BMIPS: Fix section mismatch warning
2018-02-13 11:53:28 +00:00
smp-cmp.c
MIPS: smp-cmp: Fix vpe_id build error
2017-11-01 23:23:00 +00:00
smp-cps.c
MIPS: SMP-CPS: Remove duplicate assignment of core in play_dead
2018-02-05 14:36:06 +00:00
smp-mt.c
MIPS: Use mips_gic_present() in place of gic_present
2017-09-04 13:53:14 +02:00
smp-up.c
MIPS: SMP: Allow boot_secondary SMP op to return errors
2017-08-30 00:57:27 +02:00
smp.c
MIPS changes for 4.15
2017-11-15 11:36:08 -08:00
spinlock_test.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
spram.c
MIPS: Add P6600 cases to CPU switch statements
2016-05-13 14:01:52 +02:00
stacktrace.c
sched/headers: Prepare for new header dependencies before moving code to <linux/sched/task_stack.h>
2017-03-02 08:42:36 +01:00
sync-r4k.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
syscall.c
MIPS: Branch straight to ll in mips_atomic_set()
2017-06-28 12:22:40 +02:00
sysrq.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
time.c
MIPS: Remove plat_timer_setup()
2017-08-29 15:21:55 +02:00
topology.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
traps.c
signal: Don't use structure initializers for struct siginfo
2018-01-22 19:07:08 -06:00
unaligned.c
MIPS: Declare various variables & functions static
2017-08-29 15:21:55 +02:00
uprobes.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
vdso.c
MIPS: VDSO: Drop gic_get_usm_range() usage
2017-09-04 13:53:14 +02:00
vmlinux.lds.S
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
vpe-cmp.c
…
vpe-mt.c
MIPS: MT: Remove SMTC support
2014-05-24 00:07:01 +02:00
vpe.c
module: use a structure to encapsulate layout.
2015-12-04 22:46:25 +01:00
watch.c
MIPS: Watch: Avoid duplication of bits in mips_read_watch_registers
2018-01-23 15:46:01 +00:00