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f2167f10fcca68ab9ae3f8d94d2c704c5541ac69
android_kernel_xiaomi_sm8450/arch/powerpc/kernel
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Nathan Lynch f2167f10fc powerpc/rtas: avoid device tree lookups in rtas_os_term() 
[ Upstream commit ed2213bfb192ab51f09f12e9b49b5d482c6493f3 ]

rtas_os_term() is called during panic. Its behavior depends on a couple
of conditions in the /rtas node of the device tree, the traversal of
which entails locking and local IRQ state changes. If the kernel panics
while devtree_lock is held, rtas_os_term() as currently written could
hang.

Instead of discovering the relevant characteristics at panic time,
cache them in file-static variables at boot. Note the lookup for
"ibm,extended-os-term" is converted to of_property_read_bool() since it
is a boolean property, not an RTAS function token.

Signed-off-by: Nathan Lynch <nathanl@linux.ibm.com>
Reviewed-by: Nicholas Piggin <npiggin@gmail.com>
Reviewed-by: Andrew Donnellan <ajd@linux.ibm.com>
[mpe: Incorporate suggested change from Nick]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20221118150751.469393-4-nathanl@linux.ibm.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
2023-01-14 10:16:26 +01:00
..
ptrace
powerpc/32: Fix overread/overwrite of thread_struct via ptrace
2022-06-14 18:32:46 +02:00
syscalls
mm/madvise: introduce process_madvise() syscall: an external memory hinting API
2020-10-18 09:27:10 -07:00
trace
powerpc/ftrace: Remove ftrace init tramp once kernel init is complete
2022-07-02 16:39:25 +02:00
vdso32
Merge tag 'kbuild-v5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
2020-10-22 13:13:57 -07:00
vdso64
powerpc/64/signal: Fix regression in __kernel_sigtramp_rt64() semantics
2021-02-13 13:55:02 +01:00
.gitignore
.gitignore: add SPDX License Identifier
2020-03-25 11:50:48 +01:00
align.c
powerpc: Use fallthrough pseudo-keyword
2020-07-29 21:09:37 +10:00
asm-offsets.c
powerpc/64: Fix stack trace not displaying final frame
2021-03-17 17:06:24 +01:00
audit.c
…
btext.c
powerpc/btext: add missing of_node_put
2022-01-27 10:54:21 +01:00
cacheinfo.c
powerpc/cacheinfo: Warn if cache object chain becomes unordered
2020-07-30 22:53:48 +10:00
cacheinfo.h
powerpc/cacheinfo: add cacheinfo_teardown, cacheinfo_rebuild
2019-06-15 16:52:06 +10:00
compat_audit.c
…
cpu_setup_6xx.S
powerpc/32: Blacklist functions running with MMU disabled for kprobe
2020-06-02 20:59:11 +10:00
cpu_setup_44x.S
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
cpu_setup_fsl_booke.S
powerpc/booke: Spelling s/date/data/
2019-11-17 01:56:31 -06:00
cpu_setup_pa6t.S
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 333
2019-06-05 17:37:06 +02:00
cpu_setup_power.c
powerpc/perf: MMCR0 control for PMU registers under PMCC=00
2022-01-27 10:54:05 +01:00
cpu_setup_ppc970.S
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
cputable.c
powerpc/64s: Convert some cpu_setup() and cpu_restore() functions to C
2022-01-27 10:54:05 +01:00
crash_dump.c
powerpc: Add prefixed instructions to instruction data type
2020-05-19 00:10:39 +10:00
dawr.c
powerpc/watchpoint: Guest support for 2nd DAWR hcall
2020-07-26 23:34:19 +10:00
dbell.c
powerpc: Inline doorbell sending functions
2020-07-29 21:02:09 +10:00
dma-iommu.c
powerpc/iommu: Report the correct most efficient DMA mask for PCI devices
2021-10-13 10:04:29 +02:00
dma-mask.c
dma-mapping, powerpc: simplify the arch dma_set_mask override
2019-02-18 22:41:03 +11:00
dma-swiotlb.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
dt_cpu_ftrs.c
powerpc/perf: MMCR0 control for PMU registers under PMCC=00
2022-01-27 10:54:05 +01:00
early_32.c
powerpc/fsl_booke/32: implement KASLR infrastructure
2019-11-13 19:27:40 +11:00
eeh_cache.c
powerpc/eeh_cache: Fix a possible debugfs deadlock
2020-11-02 12:54:20 +11:00
eeh_driver.c
Merge tag 'pci-v5.9-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci
2020-08-07 18:48:15 -07:00
eeh_event.c
powerpc/eeh: Fix build with STACKTRACE=n
2019-09-14 00:01:14 +10:00
eeh_pe.c
powerpc/eeh: Delete eeh_pe->config_addr
2020-10-07 22:34:47 +11:00
eeh_sysfs.c
powerpc/eeh: Pass eeh_dev to eeh_ops->resume_notify()
2020-07-26 23:34:20 +10:00
eeh.c
powerpc/eeh: Fix EEH handling for hugepages in ioremap space.
2021-05-11 14:47:35 +02:00
entry_32.S
powerpc/32s: Add missing call to kuep_lock on syscall entry
2021-03-04 11:38:40 +01:00
entry_64.S
powerpc/64s: fix scv entry fallback flush vs interrupt
2021-01-27 11:55:12 +01:00
epapr_hcalls.S
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
epapr_paravirt.c
powerpc: Use a datatype for instructions
2020-05-19 00:10:37 +10:00
exceptions-64e.S
powerpc/64e: remove 64s specific interrupt soft-mask code
2020-10-06 23:22:23 +11:00
exceptions-64s.S
powerpc/64s: fix program check interrupt emergency stack path
2021-10-13 10:04:30 +02:00
fadump.c
powerpc/fadump: fix PT_LOAD segment for boot memory area
2022-06-09 10:21:15 +02:00
firmware.c
powerpc: fix unbalanced node refcount in check_kvm_guest()
2021-11-18 14:04:17 +01:00
fpu.S
powerpc: Drop SYNC_601() ISYNC_601() and SYNC()
2020-10-08 21:17:13 +11:00
fsl_booke_entry_mapping.S
powerpc/fsl_booke/32: implement KASLR infrastructure
2019-11-13 19:27:40 +11:00
head_8xx.S
powerpc/8xx: Fix pinned TLBs with CONFIG_STRICT_KERNEL_RWX
2021-11-26 10:39:19 +01:00
head_32.h
powerpc/32: Fix hardlockup on vmap stack overflow
2021-12-01 09:19:01 +01:00
head_40x.S
powerpc/40x: Map 32Mbytes of memory at startup
2022-01-27 10:54:22 +01:00
head_44x.S
mm: reorder includes after introduction of linux/pgtable.h
2020-06-09 09:39:13 -07:00
head_64.S
powerpc/64: Fix an EMIT_BUG_ENTRY in head_64.S
2020-12-30 11:53:32 +01:00
head_book3s_32.S
powerpc/603: Fix protection of user pages mapped with PROT_NONE
2021-03-17 17:06:13 +01:00
head_booke.h
powerpc: Remove SYNC on non 6xx
2020-10-08 21:17:12 +11:00
head_fsl_booke.S
mm: reorder includes after introduction of linux/pgtable.h
2020-06-09 09:39:13 -07:00
hw_breakpoint_constraints.c
powerpc/watchpoint: Move DAWR detection logic outside of hw_breakpoint.c
2020-09-15 22:13:19 +10:00
hw_breakpoint.c
powerpc/watchpoint: Move DAWR detection logic outside of hw_breakpoint.c
2020-09-15 22:13:19 +10:00
idle_6xx.S
powerpc/mm: Switch obsolete dssall to .long
2022-06-14 18:32:46 +02:00
idle_book3e.S
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
idle_book3s.S
powerpc/idle: Don't corrupt back chain when going idle
2021-10-27 09:56:53 +02:00
idle_e500.S
powerpc/32: Blacklist functions running with MMU disabled for kprobe
2020-06-02 20:59:11 +10:00
idle.c
powerpc/mm: Switch obsolete dssall to .long
2022-06-14 18:32:46 +02:00
ima_arch.c
powerpc/ima: Fix secure boot rules in ima arch policy
2020-05-07 17:25:54 +10:00
io-workarounds.c
mm: reorder includes after introduction of linux/pgtable.h
2020-06-09 09:39:13 -07:00
io.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
iomap.c
iomap: constify ioreadX() iomem argument (as in generic implementation)
2020-08-14 19:56:57 -07:00
iommu.c
powerpc/iommu: Annotate nested lock for lockdep
2021-05-19 10:12:58 +02:00
irq.c
powerpc/kuap: Restore AMR after replaying soft interrupts
2021-03-04 11:38:06 +01:00
isa-bridge.c
powerpc: remove __ioremap_at and __iounmap_at
2020-06-02 10:59:10 -07:00
jump_label.c
powerpc: Use a datatype for instructions
2020-05-19 00:10:37 +10:00
kgdb.c
maccess: make get_kernel_nofault() check for minimal type compatibility
2020-06-18 12:10:37 -07:00
kprobes-ftrace.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156
2019-05-30 11:26:35 -07:00
kprobes.c
powerpc/kprobes: Fix kprobe Oops happens in booke
2021-08-18 08:59:14 +02:00
kvm_emul.S
powerpc/kvm: Add ifdefs around template code
2019-09-14 00:04:40 +10:00
kvm.c
powerpc/kvm: Fix kvm_use_magic_page
2022-04-08 14:39:54 +02:00
l2cr_6xx.S
powerpc/mm: Switch obsolete dssall to .long
2022-06-14 18:32:46 +02:00
legacy_serial.c
tty/serial: Migrate 8250_fsl to use has_sysrq
2019-12-18 15:04:42 +01:00
Makefile
powerpc/64s: Disable stack variable initialisation for prom_init
2022-08-21 15:15:31 +02:00
mce_power.c
powerpc/powernv: Fix machine check reporting of async store errors
2021-07-14 16:56:48 +02:00
mce.c
powerpc/mce: Avoid nmi_enter/exit in real mode on pseries hash
2020-10-16 20:13:55 +11:00
misc_32.S
powerpc: Rewrite FSL_BOOKE flush_cache_instruction() in C
2020-09-02 11:00:21 +10:00
misc_64.S
powerpc: Remove SYNC on non 6xx
2020-10-08 21:17:12 +11:00
misc.S
powerpc/32: Blacklist functions running with MMU disabled for kprobe
2020-06-02 20:59:11 +10:00
module_32.c
powerpc: module_[32|64].c: replace swap function with built-in one
2020-05-11 23:15:14 +10:00
module_64.c
maccess: rename probe_kernel_{read,write} to copy_{from,to}_kernel_nofault
2020-06-17 10:57:41 -07:00
module.c
powerpc: Use MODULES_VADDR if defined
2020-07-27 00:01:30 +10:00
msi.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
note.S
powerpc: Add PowerPC Capabilities ELF note
2019-08-30 09:40:15 +10:00
nvram_64.c
Merge tag 'powerpc-5.8-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
2020-06-05 12:39:30 -07:00
of_platform.c
powerpc/eeh: Remove eeh_dev_phb_init_dynamic()
2020-07-26 23:34:19 +10:00
optprobes_head.S
powerpc: Add prefixed instructions to instruction data type
2020-05-19 00:10:39 +10:00
optprobes.c
powerpc: Add ppc_inst_as_u64()
2020-05-26 23:36:57 +10:00
paca.c
powerpc: Avoid broken GCC __attribute__((optimize))
2020-12-30 11:53:15 +01:00
pci_32.c
powerpc/64: Adjust order in pcibios_init()
2019-08-22 23:11:48 +10:00
pci_64.c
Merge tag 'powerpc-5.8-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
2020-06-05 12:39:30 -07:00
pci_dn.c
powerpc/pci_dn: Add missing of_node_put()
2022-10-26 13:25:40 +02:00
pci_of_scan.c
powerpc/pci: Remove pcibios_setup_bus_devices()
2020-01-06 16:25:29 +11:00
pci-common.c
powerpc/pci: Fix get_phb_number() locking
2022-08-25 11:38:06 +02:00
pci-hotplug.c
powerpc/eeh: Release EEH device state synchronously
2020-05-18 21:58:44 +10:00
pmc.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
ppc32.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
ppc_save_regs.S
powerpc: Improve ppc_save_regs()
2020-04-04 21:40:57 +11:00
proc_powerpc.c
proc: convert everything to "struct proc_ops"
2020-02-04 03:05:26 +00:00
process.c
arch: ensure parisc/powerpc handle PF_IO_WORKER in copy_thread()
2023-01-04 11:39:23 +01:00
prom_init_check.sh
powerpc/prom_init: Fix kernel config grep
2022-07-07 17:52:15 +02:00
prom_init.c
powerpc/prom_init: Fix improper check of prom_getprop()
2022-01-27 10:54:05 +01:00
prom_parse.c
…
prom.c
powerpc/64: Init jump labels before parse_early_param()
2022-08-25 11:38:21 +02:00
reloc_32.S
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
reloc_64.S
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
rtas_flash.c
proc: convert everything to "struct proc_ops"
2020-02-04 03:05:26 +00:00
rtas_pci.c
mm: reorder includes after introduction of linux/pgtable.h
2020-06-09 09:39:13 -07:00
rtas-proc.c
proc: convert everything to "struct proc_ops"
2020-02-04 03:05:26 +00:00
rtas-rtc.c
powerpc: use time64_t in read_persistent_clock
2018-06-03 20:43:33 +10:00
rtas.c
powerpc/rtas: avoid device tree lookups in rtas_os_term()
2023-01-14 10:16:26 +01:00
rtasd.c
powerpc/rtasd: simplify handle_rtas_event(), emit message on events
2020-07-16 13:12:38 +10:00
secure_boot.c
powerpc/pseries: Detect secure and trusted boot state of the system.
2020-07-16 14:49:53 +10:00
security.c
powerpc/security: Add a helper to query stf_barrier type
2021-11-18 14:04:30 +01:00
secvar-ops.c
powerpc/powernv: Add OPAL API interface to access secure variable
2019-11-13 00:33:22 +11:00
secvar-sysfs.c
powerpc/secvar: fix refcount leak in format_show()
2022-04-13 21:00:59 +02:00
setup_32.c
powerpc/32: Statically initialise first emergency context
2021-05-19 10:12:54 +02:00
setup_64.c
powerpc: Fix early setup to make early_ioremap() work
2021-05-26 12:06:50 +02:00
setup-common.c
powerpc/64: Set up a kernel stack for secondaries before cpu_restore()
2020-12-30 11:53:01 +01:00
setup.h
powerpc: Avoid broken GCC __attribute__((optimize))
2020-12-30 11:53:15 +01:00
signal_32.c
powerpc/signal_32: Simplify loop in PPC64 save_general_regs()
2020-07-15 12:04:40 +10:00
signal_64.c
powerpc/signal64: Don't opencode page prefaulting
2020-07-15 12:04:40 +10:00
signal.c
powerpc: add support for TIF_NOTIFY_SIGNAL
2023-01-04 11:39:19 +01:00
signal.h
powerpc/64/sycall: Implement syscall entry/exit logic in C
2020-04-01 13:42:13 +11:00
smp-tbsync.c
…
smp.c
powerpc/fadump: Fix inaccurate CPU state info in vmcore generated with panic
2022-01-27 10:54:23 +01:00
stacktrace.c
powerpc/stacktrace: Include linux/delay.h
2021-09-18 13:40:12 +02:00
suspend.c
PM: hibernate: powerpc: Expose pfn_is_nosave() prototype
2019-06-14 10:48:56 +02:00
swsusp_32.S
powerpc/mm: Switch obsolete dssall to .long
2022-06-14 18:32:46 +02:00
swsusp_64.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 505
2019-06-19 17:11:22 +02:00
swsusp_asm64.S
powerpc/mm: Switch obsolete dssall to .long
2022-06-14 18:32:46 +02:00
swsusp_booke.S
…
swsusp.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
sys_ppc32.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
syscall_64.c
powerpc: Only include kup-radix.h for 64-bit Book3S
2020-11-19 23:47:20 +11:00
syscalls.c
y2038: syscalls: change remaining timeval to __kernel_old_timeval
2019-11-15 14:38:29 +01:00
sysfs.c
powerpc/smp: Fix OOPS in topology_init()
2021-08-18 08:59:17 +02:00
systbl_chk.sh
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
systbl.S
powerpc: align syscall table for ppc32
2022-09-08 11:11:37 +02:00
tau_6xx.c
powerpc/tau: Disable TAU between measurements
2020-09-15 22:13:30 +10:00
time.c
powerpc/time: Enable sched clock for irqtime
2021-03-04 11:38:01 +01:00
tm.S
powerpc/tm: Save and restore AMR on treclaim and trechkpt
2020-10-06 23:22:25 +11:00
traps.c
powerpc/perf: move perf irq/nmi handling details into traps.c
2022-01-27 10:54:05 +01:00
ucall.S
powerpc/kernel: Add ucall_norets() ultravisor call handler
2019-08-30 09:40:15 +10:00
udbg_16550.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
udbg.c
powerpc/udbg: Make it safe to call udbg_printf() always
2019-10-11 19:33:25 +11:00
uprobes.c
powerpc: Add ppc_inst_next()
2020-05-26 23:36:51 +10:00
vdso.c
powerpc/64/signal: Fix regression in __kernel_sigtramp_rt64() semantics
2021-02-13 13:55:02 +01:00
vecemu.c
powerpc: Define and use get_user_instr() et. al.
2020-05-19 00:10:37 +10:00
vector.S
powerpc: re-initialise lazy FPU/VEC counters on every fault
2020-07-16 13:00:24 +10:00
vmlinux.lds.S
powerpc/64s: fix scv entry fallback flush vs interrupt
2021-01-27 11:55:12 +01:00
watchdog.c
powerpc/watchdog: Fix missed watchdog reset due to memory ordering race
2022-01-27 10:54:21 +01:00