Nicholas Piggin 6029755eed powerpc: Fix deadlock with multiple calls to smp_send_stop ...

smp_send_stop can lock up the IPI path for any subsequent calls,
because the receiving CPUs spin in their handler function. This
started becoming a problem with the addition of an smp_send_stop
call in the reboot path, because panics can reboot after doing
their own smp_send_stop.

The NMI IPI variant was fixed with ac61c11566 ("powerpc: Fix
smp_send_stop NMI IPI handling"), which leaves the smp_call_function
variant.

This is fixed by having smp_send_stop only ever do the
smp_call_function once. This is a bit less robust than the NMI IPI
fix, because any other call to smp_call_function after smp_send_stop
could deadlock, but that has always been the case, and it was not
been a problem before.

Fixes: f2748bdfe1573 ("powerpc/powernv: Always stop secondaries before reboot/shutdown")
Reported-by: Abdul Haleem <abdhalee@linux.vnet.ibm.com>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

2018-04-27 16:35:57 +10:00

..

trace

powerpc updates for 4.15

2017-11-16 12:47:46 -08:00

vdso32

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

vdso64

powerpc/vdso64: Add support for CLOCK_{REALTIME/MONOTONIC}_COARSE

2017-12-04 15:01:09 +11:00

.gitignore

…

align.c

powerpc: Fix check for copy/paste instructions in alignment handler

2017-10-25 12:42:35 +02:00

asm-offsets.c

Merge branch 'topic/paca' into next

2018-03-31 09:09:36 +11:00

audit.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

btext.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

cacheinfo.c

powerpc: Convert to using %pOF instead of full_name

2017-08-23 22:27:04 +10:00

cacheinfo.h

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

compat_audit.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

cpu_setup_6xx.S

powerpc: Free up CPU feature bits on 64-bit machines

2018-03-24 00:38:51 +11:00

cpu_setup_44x.S

…

cpu_setup_fsl_booke.S

powerpc: Free up CPU feature bits on 64-bit machines

2018-03-24 00:38:51 +11:00

cpu_setup_pa6t.S

…

cpu_setup_power.S

Merge branch 'fixes' into next

2018-01-21 23:21:14 +11:00

cpu_setup_ppc970.S

…

cputable.c

powerpc/64s: Remove POWER4 support

2018-04-01 00:47:50 +11:00

crash_dump.c

Replace <asm/uaccess.h> with <linux/uaccess.h> globally

2016-12-24 11:46:01 -08:00

crash.c

powerpc/64: Use array of paca pointers and allocate pacas individually

2018-03-30 23:34:23 +11:00

dbell.c

powerpc: Introduce msgsnd/doorbell barrier primitives

2017-04-13 23:34:33 +10:00

dma-iommu.c

powerpc: rename dma_direct_ to dma_nommu_

2018-01-10 16:41:14 +01:00

dma-swiotlb.c

swiotlb: rename swiotlb_free to swiotlb_exit

2018-01-15 09:35:39 +01:00

dma.c

powerpc: rename swiotlb_dma_ops

2018-01-15 09:35:26 +01:00

dt_cpu_ftrs.c

powerpc/64s: Fix CPU_FTRS_ALWAYS vs DT CPU features

2018-04-13 23:51:44 +10:00

eeh_cache.c

powerpc/eeh: Fix misleading comment in __eeh_addr_cache_get_device()

2018-03-27 23:44:58 +11:00

eeh_dev.c

powerpc/eeh: Create PHB PEs after EEH is initialized

2017-09-21 14:56:00 +10:00

eeh_driver.c

powerpc/eeh: Fix race with driver un/bind

2018-04-01 00:47:45 +11:00

eeh_event.c

powerpc/eeh: Manage EEH_PE_RECOVERING inside eeh_handle_normal_event()

2018-03-27 23:44:58 +11:00

eeh_pe.c

powerpc/eeh: Fix enabling bridge MMIO windows

2018-04-19 13:02:38 +10:00

eeh_sysfs.c

powerpc/eeh: Add EEH notify resume sysfs

2018-01-27 20:02:52 +11:00

eeh.c

powerpc/eeh: Add eeh_state_active() helper

2018-03-27 23:45:19 +11:00

entry_32.S

powerpc/8xx: Only perform perf counting when perf is in use.

2018-01-16 23:47:12 +11:00

entry_64.S

powerpc/64s: Set assembler machine type to POWER4

2018-04-01 00:47:49 +11:00

epapr_hcalls.S

ppc: move exports to definitions

2016-08-07 23:50:09 -04:00

epapr_paravirt.c

Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc

2014-06-10 18:54:22 -07:00

exceptions-64e.S

powerpc/64s: Fix may_hard_irq_enable() for PMI soft masking

2018-02-08 23:56:10 +11:00

exceptions-64s.S

powerpc/64s: Set assembler machine type to POWER4

2018-04-01 00:47:49 +11:00

fadump.c

Revert "powerpc: Do not call ppc_md.panic in fadump panic notifier"

2017-12-05 23:21:46 +11:00

firmware.c

…

fpu.S

Merge branch 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild

2016-10-14 14:26:58 -07:00

fsl_booke_entry_mapping.S

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

head_8xx.S

powerpc/8xx: Use L1 entry APG to handle _PAGE_ACCESSED for CONFIG_SWAP

2018-01-16 23:47:15 +11:00

head_32.S

powerpc: Fix DABR match on hash based systems

2017-11-13 22:12:48 +11:00

head_40x.S

ppc: move exports to definitions

2016-08-07 23:50:09 -04:00

head_44x.S

ppc: move exports to definitions

2016-08-07 23:50:09 -04:00

head_64.S

powerpc/64: Use array of paca pointers and allocate pacas individually

2018-03-30 23:34:23 +11:00

head_booke.h

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

head_fsl_booke.S

ppc: move exports to definitions

2016-08-07 23:50:09 -04:00

hw_breakpoint.c

powerpc: Update ptrace to use ppc_breakpoint_available()

2018-03-27 23:52:44 +11:00

idle_6xx.S

…

idle_book3e.S

powerpc/64: Rename soft_enabled to irq_soft_mask

2018-01-19 22:37:01 +11:00

idle_book3s.S

powerpc/kvm: Fix lockups when running KVM guests on Power8

2018-04-19 16:22:20 +10:00

idle_e500.S

powerpc/e500mc: Remove dead L2 flushing code in idle_e500.S

2015-06-02 21:37:19 -05:00

idle_power4.S

powerpc/64: Rename soft_enabled to irq_soft_mask

2018-01-19 22:37:01 +11:00

idle.c

…

ima_kexec.c

powerpc: ima: send the kexec buffer to the next kernel

2016-12-20 09:48:44 -08:00

io-workarounds.c

powerpc: Convert to using %pOF instead of full_name

2017-08-23 22:27:04 +10:00

io.c

…

iomap.c

powerpc: iomap.c: introduce io{read|write}64_{lo_hi|hi_lo}

2018-04-05 14:59:26 +10:00

iommu.c

powerpc/iommu: Use permission-specific DEVICE_ATTR variants

2017-09-01 16:42:54 +10:00

irq.c

powerpc/64s: Fix lost pending interrupt due to race causing lost update to irq_happened

2018-03-23 08:41:40 +11:00

isa-bridge.c

powerpc: Convert to using %pOF instead of full_name

2017-08-23 22:27:04 +10:00

jump_label.c

jump_label: Rename JUMP_LABEL_{EN,DIS}ABLE to JUMP_LABEL_{JMP,NOP}

2015-08-03 11:34:12 +02:00

kexec_elf_64.c

kernel/kexec_file.c: allow archs to set purgatory load address

2018-04-13 17:10:28 -07:00

kgdb.c

powerpc/8xx: Getting rid of remaining use of CONFIG_8xx

2017-08-10 23:32:12 +10:00

kprobes-ftrace.c

powerpc/kprobes: Do not disable interrupts for optprobes and kprobes_on_ftrace

2017-11-12 23:51:41 +11:00

kprobes.c

powerpc/kprobes: Fix call trace due to incorrect preempt count

2018-03-31 00:10:33 +11:00

kvm_emul.S

…

kvm.c

powerpc/64: Fix watchdog configuration regressions

2017-08-31 14:26:00 +10:00

l2cr_6xx.S

powerpc/l2cr_6xx: Fix invalid use of register expressions

2017-08-15 21:04:32 +10:00

legacy_serial.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_32.c

…

machine_kexec_64.c

powerpc/64s: Allocate LPPACAs individually

2018-03-30 23:34:24 +11:00

machine_kexec_file_64.c

kexec_file,x86,powerpc: factor out kexec_file_ops functions

2018-04-13 17:10:27 -07:00

machine_kexec.c

powerpc: Update of_remove_property() call sites to remove null checking

2016-05-11 21:54:04 +10:00

Makefile

powerpc updates for 4.17

2018-04-07 12:08:19 -07:00

mce_power.c

powerpc/mce: Fix a bug where mce loops on memory UE.

2018-04-24 13:54:51 +10:00

mce.c

powerpc updates for 4.16

2018-02-02 10:01:04 -08:00

misc_32.S

powerpc/40x: Clear MSR_DR in one insn instead of two

2017-06-02 19:20:43 +10:00

misc_64.S

powerpc: Remove unused flush_dcache_phys_range()

2018-03-20 16:47:53 +11:00

misc.S

ppc: move exports to definitions

2016-08-07 23:50:09 -04:00

module_32.c

powerpc/module: Only try to generate the ftrace_caller() stub once

2016-03-07 14:53:53 +11:00

module_64.c

powerpc updates for 4.16

2018-02-02 10:01:04 -08:00

module.c

Replace <asm/uaccess.h> with <linux/uaccess.h> globally

2016-12-24 11:46:01 -08:00

module.lds

powerpc/modules: Fix alignment of .toc section in kernel modules

2017-12-11 13:03:35 +11:00

msi.c

powerpc: Remove MSI-related PCI controller ops from ppc_md

2015-06-02 11:47:45 +10:00

nvram_64.c

powerpc: Use sizeof(*foo) rather than sizeof(struct foo)

2018-03-20 16:47:53 +11:00

of_platform.c

powerpc: Convert to using %pOF instead of full_name

2017-08-23 22:27:04 +10:00

optprobes_head.S

powerpc/64: Rename soft_enabled to irq_soft_mask

2018-01-19 22:37:01 +11:00

optprobes.c

powerpc/kprobes: Do not disable interrupts for optprobes and kprobes_on_ftrace

2017-11-12 23:51:41 +11:00

paca.c

Merge branch 'topic/paca' into next

2018-03-31 09:09:36 +11:00

pci_32.c

powerpc/PCI: Deprecate pci_get_bus_and_slot()

2018-01-11 17:21:55 -06:00

pci_64.c

powerpc/64s: Replace CONFIG_PPC_STD_MMU_64 with CONFIG_PPC_BOOK3S_64

2017-11-06 16:48:14 +11:00

pci_dn.c

powerpc/pci: Separate SR-IOV Calls

2017-12-11 13:03:35 +11:00

pci_of_scan.c

pci-v4.16-changes

2018-02-06 09:59:40 -08:00

pci-common.c

powerpc/pci: Use generic pci_mmap_resource_range()

2018-02-28 16:18:53 -06:00

pci-hotplug.c

powerpc/pci: Unroll two pass loop when scanning bridges

2017-12-18 23:05:52 -06:00

pmc.c

…

ppc32.h

…

ppc_save_regs.S

…

proc_powerpc.c

powerpc: Use octal numbers for file permissions

2018-01-22 05:48:33 +11:00

process.c

powerpc: Don't write to DABR on >= Power8 if DAWR is disabled

2018-04-03 21:50:08 +10:00

prom_init_check.sh

powerpc/mm/radix: Update command line parsing for disable_radix

2018-04-04 16:59:50 +10:00

prom_init.c

powerpc/mm/radix: Update command line parsing for disable_radix

2018-04-04 16:59:50 +10:00

prom_parse.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

prom.c

Merge branch 'topic/paca' into next

2018-03-31 09:09:36 +11:00

ptrace32.c

Replace <asm/uaccess.h> with <linux/uaccess.h> globally

2016-12-24 11:46:01 -08:00

ptrace.c

powerpc: Update ptrace to use ppc_breakpoint_available()

2018-03-27 23:52:44 +11:00

reloc_32.S

…

reloc_64.S

powerpc/asm: Convert .llong directives to .8byte

2017-08-31 14:26:47 +10:00

rtas_flash.c

powerpc: Use octal numbers for file permissions

2018-01-22 05:48:33 +11:00

rtas_pci.c

powerpc/kernel: Change retrieval of pci_dn

2017-08-31 14:26:40 +10:00

rtas-proc.c

powerpc: Use octal numbers for file permissions

2018-01-22 05:48:33 +11:00

rtas-rtc.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

rtas.c

locking/arch, powerpc/rtas: Use arch_spin_lock() instead of arch_spin_lock_flags()

2017-10-18 15:15:07 +02:00

rtasd.c

vfs: do bulk POLL* -> EPOLL* replacement

2018-02-11 14:34:03 -08:00

security.c

powerpc: Move default security feature flags

2018-04-03 21:50:08 +10:00

setup_32.c

powerpc/32: Add missing prototypes for (early|machine)_init()

2018-03-13 15:50:42 +11:00

setup_64.c

powerpc/64s: Default l1d_size to 64K in RFI fallback flush

2018-04-17 19:29:04 +10:00

setup-common.c

powerpc/64e: Fix oops due to deferral of paca allocation

2018-04-01 00:47:38 +11:00

setup.h

powerpc/64: move default SPR recording

2018-03-30 23:34:26 +11:00

signal_32.c

powerpc/32: Mark both tmp variables as unused

2018-03-13 15:50:33 +11:00

signal_64.c

powerpc/tm: Fix endianness flip on trap

2018-01-22 05:48:36 +11:00

signal.c

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/livepatching

2018-01-31 13:02:18 -08:00

signal.h

powerpc: Add missing prototypes for sys_sigreturn() & sys_rt_sigreturn()

2018-03-13 15:50:39 +11:00

smp-tbsync.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

smp.c

powerpc: Fix deadlock with multiple calls to smp_send_stop

2018-04-27 16:35:57 +10:00

stacktrace.c

powerpc: Make /proc/self/stack always print the current stack

2017-03-28 14:43:59 +11:00

suspend.c

nosave: consolidate __nosave_{begin,end} in <asm/sections.h>

2014-10-09 22:26:04 -04:00

swsusp_32.S

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

swsusp_64.c

sched/headers: Prepare for new header dependencies before moving code to <linux/sched/nmi.h>

2017-03-02 08:42:30 +01:00

swsusp_asm64.S

powerpc: Fix invalid use of register expressions

2017-08-10 22:29:41 +10:00

swsusp_booke.S

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

swsusp.c

powerpc/swsusp: Include suspend.h to silence sparse warnings

2017-03-20 19:02:49 +11:00

sys_ppc32.c

mm: add ksys_readahead() helper; remove in-kernel calls to sys_readahead()

2018-04-02 20:16:12 +02:00

syscalls.c

Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-next

2018-04-03 14:08:58 -07:00

sysfs.c

Merge branch 'topic/paca' into next

2018-03-31 09:09:36 +11:00

systbl_chk.c

powerpc: Standardise on NR_syscalls rather than __NR_syscalls.

2015-11-26 22:11:17 +11:00

systbl_chk.sh

powerpc: Standardise on NR_syscalls rather than __NR_syscalls.

2015-11-26 22:11:17 +11:00

systbl.S

powerpc/asm: Convert .llong directives to .8byte

2017-08-31 14:26:47 +10:00

tau_6xx.c

treewide: setup_timer() -> timer_setup()

2017-11-21 15:57:07 -08:00

time.c

powerpc: Fix oops due to bad access of lppaca on bare metal

2018-04-03 21:50:07 +10:00

tm.S

powerpc updates for 4.15

2017-11-16 12:47:46 -08:00

traps.c

powerpc/fscr: Enable interrupts earlier before calling get_user()

2018-04-10 11:23:23 +10:00

udbg_16550.c

powerpc: Fix bad NULL pointer check in udbg_uart_getc_poll()

2014-11-12 13:47:20 +11:00

udbg.c

powerpc: Remove the celleb support

2015-04-07 17:15:13 +10:00

uprobes.c

powerpc/uprobes: Implement arch_uretprobe_is_alive()

2017-08-24 16:19:21 +10:00

vdso.c

powerpc: Use feature bit for RTC presence rather than timebase presence

2018-03-24 00:36:45 +11:00

vecemu.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

vector.S

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

vmlinux.lds.S

powerpc updates for 4.16

2018-02-02 10:01:04 -08:00

watchdog.c

powerpc/watchdog: Print the NIP in soft_nmi_interrupt()

2018-01-28 17:08:29 +11:00