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Nathan Lynch 482d990a5d powerpc/rtas: avoid scheduling in rtas_os_term() 
[ Upstream commit 6c606e57eecc37d6b36d732b1ff7e55b7dc32dd4 ]

It's unsafe to use rtas_busy_delay() to handle a busy status from
the ibm,os-term RTAS function in rtas_os_term():

Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b
BUG: sleeping function called from invalid context at arch/powerpc/kernel/rtas.c:618
in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 1, name: swapper/0
preempt_count: 2, expected: 0
CPU: 7 PID: 1 Comm: swapper/0 Tainted: G      D            6.0.0-rc5-02182-gf8553a572277-dirty #9
Call Trace:
[c000000007b8f000] [c000000001337110] dump_stack_lvl+0xb4/0x110 (unreliable)
[c000000007b8f040] [c0000000002440e4] __might_resched+0x394/0x3c0
[c000000007b8f0e0] [c00000000004f680] rtas_busy_delay+0x120/0x1b0
[c000000007b8f100] [c000000000052d04] rtas_os_term+0xb8/0xf4
[c000000007b8f180] [c0000000001150fc] pseries_panic+0x50/0x68
[c000000007b8f1f0] [c000000000036354] ppc_panic_platform_handler+0x34/0x50
[c000000007b8f210] [c0000000002303c4] notifier_call_chain+0xd4/0x1c0
[c000000007b8f2b0] [c0000000002306cc] atomic_notifier_call_chain+0xac/0x1c0
[c000000007b8f2f0] [c0000000001d62b8] panic+0x228/0x4d0
[c000000007b8f390] [c0000000001e573c] do_exit+0x140c/0x1420
[c000000007b8f480] [c0000000001e586c] make_task_dead+0xdc/0x200

Use rtas_busy_delay_time() instead, which signals without side effects
whether to attempt the ibm,os-term RTAS call again.

Signed-off-by: Nathan Lynch <nathanl@linux.ibm.com>
Reviewed-by: Nicholas Piggin <npiggin@gmail.com>
Reviewed-by: Andrew Donnellan <ajd@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20221118150751.469393-5-nathanl@linux.ibm.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
2023-01-04 11:28:58 +01:00
..
ptrace
powerpc: Fix all occurences of duplicate words
2022-07-25 12:05:15 +10:00
syscalls
powerpc/32: fix syscall wrappers with 64-bit arguments
2022-11-01 10:24:09 +11:00
trace
powerpc/64: provide a helper macro to load r2 with the kernel TOC
2022-09-28 19:22:12 +10:00
vdso
powerpc: Drops STABS_DEBUG from linker scripts
2022-09-30 18:35:52 +10:00
.gitignore
…
85xx_entry_mapping.S
powerpc: Remove CONFIG_FSL_BOOKE
2022-09-26 22:47:37 +10:00
align.c
powerpc/inst: Define ppc_inst_t
2021-12-09 22:41:21 +11:00
asm-offsets.c
powerpc: Remove CONFIG_PPC_FSL_BOOK3E
2022-09-26 23:00:13 +10:00
audit.c
Revert "powerpc/audit: Convert powerpc to AUDIT_ARCH_COMPAT_GENERIC"
2021-10-27 22:30:32 +11:00
btext.c
powerpc: Fix all occurences of duplicate words
2022-07-25 12:05:15 +10:00
cacheinfo.c
powerpc: Remove asm/prom.h from all files that don't need it
2022-05-08 22:15:04 +10:00
cacheinfo.h
…
compat_audit.c
Revert "powerpc/audit: Convert powerpc to AUDIT_ARCH_COMPAT_GENERIC"
2021-10-27 22:30:32 +11:00
cpu_setup_6xx.S
…
cpu_setup_44x.S
…
cpu_setup_e500.S
powerpc: Remove CONFIG_PPC_BOOK3E_MMU
2022-09-26 23:00:14 +10:00
cpu_setup_pa6t.S
…
cpu_setup_power.c
powerpc/cputable: Move __cpu_setup() prototypes out of cputable.h
2022-09-26 22:26:49 +10:00
cpu_setup_ppc970.S
…
cpu_specs_8xx.h
powerpc/cputable: Split cpu_specs[] out of cputable.h
2022-09-26 22:47:13 +10:00
cpu_specs_40x.h
powerpc/cputable: Split cpu_specs[] out of cputable.h
2022-09-26 22:47:13 +10:00
cpu_specs_44x.h
powerpc/cputable: Split cpu_specs[] out of cputable.h
2022-09-26 22:47:13 +10:00
cpu_specs_47x.h
powerpc/cputable: Split cpu_specs[] out of cputable.h
2022-09-26 22:47:13 +10:00
cpu_specs_85xx.h
powerpc/cputable: Split cpu_specs[] for mpc85xx and e500mc
2022-09-26 23:00:05 +10:00
cpu_specs_book3s_32.h
powerpc/cputable: Split cpu_specs[] out of cputable.h
2022-09-26 22:47:13 +10:00
cpu_specs_book3s_64.h
powerpc/cputable: Split cpu_specs[] out of cputable.h
2022-09-26 22:47:13 +10:00
cpu_specs_e500mc.h
powerpc/cputable: Split cpu_specs[] for mpc85xx and e500mc
2022-09-26 23:00:05 +10:00
cpu_specs.h
powerpc/cputable: Split cpu_specs[] for mpc85xx and e500mc
2022-09-26 23:00:05 +10:00
cputable.c
powerpc/cputable: Split cpu_specs[] out of cputable.h
2022-09-26 22:47:13 +10:00
crash_dump.c
powerpc updates for 5.19
2022-05-28 11:27:17 -07:00
dawr.c
powerpc: Include asm/firmware.h in all users of firmware_has_feature()
2022-06-29 16:45:05 +10:00
dbell.c
powerpc/64s/interrupt: Don't enable MSR[EE] in irq handlers unless perf is in use
2021-12-16 21:31:45 +11:00
dma-iommu.c
powerpc/iommu: Report the correct most efficient DMA mask for PCI devices
2021-09-30 17:10:17 +10:00
dma-mask.c
…
dma-swiotlb.c
swiotlb: add a SWIOTLB_ANY flag to lift the low memory restriction
2022-04-18 07:21:12 +02:00
dt_cpu_ftrs.c
powerpc: move from strlcpy with unused retval to strscpy
2022-08-26 11:02:20 +10:00
early_32.c
powerpc: Move C prototypes out of asm-prototypes.h
2022-03-08 22:06:25 +11:00
eeh_cache.c
powerpc/kernel: Add __init attribute to eligible functions
2021-12-23 22:33:10 +11:00
eeh_driver.c
powerpc: Fix all occurences of duplicate words
2022-07-25 12:05:15 +10:00
eeh_event.c
powerpc: fix typos in comments
2022-05-05 22:12:44 +10:00
eeh_pe.c
powerpc: Fix all occurences of "the the"
2022-05-22 15:59:43 +10:00
eeh_sysfs.c
powerpc: Add missing headers
2022-05-08 22:15:40 +10:00
eeh.c
powerpc: fix typos in comments
2022-05-05 22:12:44 +10:00
entry_32.S
powerpc/64: use 32-bit immediate for STACK_FRAME_REGS_MARKER
2022-09-28 19:22:12 +10:00
entry_64.S
powerpc: Remove CONFIG_PPC_BOOK3E
2022-09-26 23:00:13 +10:00
epapr_hcalls.S
…
epapr_paravirt.c
powerpc/inst: Define ppc_inst_t
2021-12-09 22:41:21 +11:00
exceptions-64e.S
powerpc/64/interrupt: Prevent NMI PMI causing a dangerous warning
2022-10-18 22:46:19 +11:00
exceptions-64s.S
powerpc/64s/interrupt: Perf NMI should not take normal exit path
2022-10-18 22:46:19 +11:00
fadump.c
powerpc updates for 5.19
2022-05-28 11:27:17 -07:00
firmware.c
powerpc: fix unbalanced node refcount in check_kvm_guest()
2021-10-09 00:15:59 +11:00
fpu.S
powerpc/64s/interrupt: handle MSR EE and RI in interrupt entry wrapper
2021-12-16 21:31:45 +11:00
head_8xx.S
powerpc/32: Remove _ENTRY() macro
2022-02-07 21:03:10 +11:00
head_32.h
powerpc updates for 5.17
2022-01-14 15:17:26 +01:00
head_40x.S
powerpc/32: Remove _ENTRY() macro
2022-02-07 21:03:10 +11:00
head_44x.S
powerpc/32: Remove _ENTRY() macro
2022-02-07 21:03:10 +11:00
head_64.S
bitmap patches for v6.1-rc1
2022-10-10 12:49:34 -07:00
head_85xx.S
powerpc: Change CONFIG_E500 to CONFIG_PPC_E500
2022-09-26 23:00:13 +10:00
head_book3s_32.S
powerpc/32: Set an IBAT covering up to _einittext during init
2022-07-27 21:36:05 +10:00
head_booke.h
powerpc: Remove CONFIG_PPC_BOOK3E_MMU
2022-09-26 23:00:14 +10:00
hw_breakpoint_constraints.c
powerpc/inst: Define ppc_inst_t
2021-12-09 22:41:21 +11:00
hw_breakpoint.c
powerpc/hw_breakpoint: Avoid relying on caller synchronization
2022-08-30 10:56:23 +02:00
idle_6xx.S
powerpc/mm: Switch obsolete dssall to .long
2021-12-23 22:35:13 +11:00
idle_64e.S
powerpc: add ISA v3.0 / v3.1 wait opcode macro
2022-09-28 19:22:10 +10:00
idle_85xx.S
powerpc: Cleanup idle for e500
2022-09-26 23:00:14 +10:00
idle_book3s.S
powerpc/idle: Don't corrupt back chain when going idle
2021-10-20 21:37:58 +11:00
idle.c
powerpc/idle: Fix return value of __setup() handler
2022-05-04 19:37:46 +10:00
ima_arch.c
…
interrupt_64.S
powerpc/64s/interrupt: Fix clear of PACA_IRQS_HARD_DIS when returning to soft-masked context
2022-10-27 00:38:35 +11:00
interrupt.c
powerpc/64s/interrupt: Perf NMI should not take normal exit path
2022-10-18 22:46:19 +11:00
io-workarounds.c
powerpc: Fix reverse map real-mode address lookup with huge vmalloc
2021-05-28 22:54:27 +10:00
io.c
…
iomap.c
powerpc: inline iomap accessors
2020-12-04 01:01:09 +11:00
iommu.c
powerpc/iommu: Fix iommu_table_in_use for a small default DMA window case
2022-07-28 16:22:13 +10:00
irq_64.c
powerpc/64/irq: tidy soft-masked irq replay and improve documentation
2022-09-28 19:22:11 +10:00
irq.c
asm-generic: Conditionally enable do_softirq_own_stack() via Kconfig.
2022-09-05 17:20:55 +02:00
isa-bridge.c
powerpc: Add missing headers
2022-05-08 22:15:40 +10:00
jump_label.c
powerpc: Don't use 'struct ppc_inst' to reference instruction location
2021-06-17 00:09:00 +10:00
kdebugfs.c
powerpc: rename powerpc_debugfs_root to arch_debugfs_dir
2021-08-13 22:04:26 +10:00
kgdb.c
powerpc: Remove CONFIG_FSL_BOOKE
2022-09-26 22:47:37 +10:00
kprobes-ftrace.c
ftrace: disable preemption when recursion locked
2021-10-27 11:21:49 -04:00
kprobes.c
powerpc/kprobes: Fix null pointer reference in arch_prepare_kprobe()
2022-09-28 22:19:52 +10:00
kvm_emul.S
…
kvm.c
powerpc: Remove CONFIG_PPC_BOOK3E_MMU
2022-09-26 23:00:14 +10:00
l2cr_6xx.S
powerpc/mm: Switch obsolete dssall to .long
2021-12-23 22:35:13 +11:00
legacy_serial.c
powerpc/kernel: Add missing of_node_put() in legacy_serial.c
2022-09-05 17:28:26 +10:00
Makefile
powerpc/32: fix syscall wrappers with 64-bit arguments of unaligned register-pairs
2022-10-13 00:49:58 +11:00
mce_power.c
powerpc/inst: Define ppc_inst_t
2021-12-09 22:41:21 +11:00
mce.c
powerpc/mce: use early_cpu_to_node() in mce_init()
2022-07-27 21:36:04 +10:00
misc_32.S
powerpc: Avoid link stack corruption in misc asm functions
2021-08-25 13:35:47 +10:00
misc_64.S
powerpc: Remove CONFIG_PPC_BOOK3E
2022-09-26 23:00:13 +10:00
misc.S
powerpc: Avoid link stack corruption in misc asm functions
2021-08-25 13:35:47 +10:00
module_32.c
powerpc/modules: Use PPC_LI macros instead of opencoding
2022-05-22 15:58:27 +10:00
module_64.c
powerpc/modules: Use PPC_LI macros instead of opencoding
2022-05-22 15:58:27 +10:00
module.c
powerpc: Replace PPC64_ELF_ABI_v{1/2} by CONFIG_PPC64_ELF_ABI_V{1/2}
2022-05-19 23:11:29 +10:00
msi.c
…
note.S
…
nvram_64.c
powerpc: Add missing headers
2022-05-08 22:15:40 +10:00
of_platform.c
powerpc/eeh: Remove eeh_dev_phb_init_dynamic()
2020-07-26 23:34:19 +10:00
optprobes_head.S
powerpc/64: provide a helper macro to load r2 with the kernel TOC
2022-09-28 19:22:12 +10:00
optprobes.c
powerpc/inst: Define ppc_inst_t as u32 on PPC32
2021-12-09 22:41:21 +11:00
paca.c
powerpc: Remove CONFIG_PPC_BOOK3E
2022-09-26 23:00:13 +10:00
pci_32.c
powerpc/pci: Enable PCI domains in /proc when PCI bus numbers are not unique
2022-08-25 17:47:08 +10:00
pci_64.c
powerpc/pci: Hide pci_device_from_OF_node() for non-powermac code
2022-07-27 21:36:03 +10:00
pci_dn.c
powerpc/pci_dn: Add missing of_node_put()
2022-09-05 17:30:25 +10:00
pci_of_scan.c
powerpc: Add missing headers
2022-05-08 22:15:40 +10:00
pci-common.c
powerpc/pci-common: Fix refcount bug for 'phb->dn'
2022-09-05 17:30:29 +10:00
pci-hotplug.c
powerpc: Add missing headers
2022-05-08 22:15:40 +10:00
pmc.c
…
ppc_save_regs.S
…
proc_powerpc.c
powerpc: Add missing headers
2022-05-08 22:15:40 +10:00
process.c
Random number generator fixes for Linux 6.1-rc1.
2022-10-16 15:27:07 -07:00
prom_init_check.sh
powerpc/64: Remove unused prom_init_toc symbols
2022-09-26 20:58:16 +10:00
prom_init.c
powerpc/prom_init: drop PROM_BUG()
2022-09-26 20:58:18 +10:00
prom_parse.c
…
prom.c
powerpc: Add device-tree model to the hardware description
2022-09-30 18:35:53 +10:00
reloc_32.S
powerpc: Avoid link stack corruption in misc asm functions
2021-08-25 13:35:47 +10:00
reloc_64.S
powerpc/64: avoid using r13 in relocate
2022-09-28 19:22:13 +10:00
rtas_entry.S
powerpc/rtas: Fix RTAS MSR[HV] handling for Cell
2022-08-26 08:41:54 +10:00
rtas_flash.c
powerpc: fix typos in comments
2022-05-05 22:12:44 +10:00
rtas_pci.c
powerpc: Add missing headers
2022-05-08 22:15:40 +10:00
rtas-proc.c
powerpc: Add missing headers
2022-05-08 22:15:40 +10:00
rtas-rtc.c
powerpc: Remove asm/prom.h from all files that don't need it
2022-05-08 22:15:04 +10:00
rtas.c
powerpc/rtas: avoid scheduling in rtas_os_term()
2023-01-04 11:28:58 +01:00
rtasd.c
powerpc: Remove asm/prom.h from all files that don't need it
2022-05-08 22:15:04 +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: Remove CONFIG_PPC_FSL_BOOK3E
2022-09-26 23:00:13 +10:00
secvar-ops.c
…
secvar-sysfs.c
powerpc/secvar: fix refcount leak in format_show()
2022-03-08 22:07:41 +11:00
setup_32.c
powerpc: Change CONFIG_E500 to CONFIG_PPC_E500
2022-09-26 23:00:13 +10:00
setup_64.c
powerpc/64s/interrupt: halt early boot interrupts if paca is not set up
2022-09-28 19:22:13 +10:00
setup-common.c
powerpc: Add hardware description string
2022-09-30 18:35:52 +10:00
setup.h
powerpc: Remove CONFIG_PPC_BOOK3E
2022-09-26 23:00:13 +10:00
signal_32.c
powerpc: Include all arch-specific syscall prototypes
2022-09-28 19:22:08 +10:00
signal_64.c
powerpc/signal: Update comment for clarity
2022-07-28 16:22:14 +10:00
signal.c
powerpc/signal: Report minimum signal frame size to userspace via AT_MINSIGSTKSZ
2022-05-19 23:11:26 +10:00
signal.h
powerpc: Don't add __powerpc_ prefix to syscall entry points
2022-10-07 00:59:54 +11:00
smp-tbsync.c
…
smp.c
powerpc/smp: poll cpu_callin_map more aggressively in __cpu_up()
2022-09-28 19:22:14 +10:00
stacktrace.c
kprobes: treewide: Make it harder to refer kretprobe_trampoline directly
2021-09-30 21:24:06 -04:00
static_call.c
powerpc/32: Add support for out-of-line static calls
2021-10-22 15:22:05 +11:00
suspend.c
…
swsusp_32.S
powerpc/mm: Switch obsolete dssall to .long
2021-12-23 22:35:13 +11:00
swsusp_64.c
powerpc/machdep: Remove stale functions from ppc_md structure
2021-10-22 15:22:05 +11:00
swsusp_85xx.S
powerpc: Remove CONFIG_FSL_BOOKE
2022-09-26 22:47:37 +10:00
swsusp_asm64.S
powerpc/64: asm use consistent global variable declaration and access
2022-09-28 19:22:12 +10:00
swsusp.c
…
sys_ppc32.c
powerpc/32: fix syscall wrappers with 64-bit arguments
2022-11-01 10:24:09 +11:00
syscall.c
powerpc: Provide syscall wrapper
2022-09-28 19:22:09 +10:00
syscalls.c
powerpc: Adopt SYSCALL_DEFINE for arch-specific syscall handlers
2022-09-28 19:22:08 +10:00
sysfs.c
powerpc: Remove CONFIG_PPC_FSL_BOOK3E
2022-09-26 23:00:13 +10:00
systbl.c
powerpc: Don't add __powerpc_ prefix to syscall entry points
2022-10-07 00:59:54 +11:00
tau_6xx.c
powerpc: Move C prototypes out of asm-prototypes.h
2022-03-08 22:06:25 +11:00
time.c
powerpc/time: avoid programming DEC at the start of the timer interrupt
2022-09-28 19:22:09 +10:00
tm.S
powerpc/tm: Fix more userspace r13 corruption
2022-03-16 11:59:24 +11:00
traps.c
powerpc/64s: early boot machine check handler
2022-09-28 19:22:13 +10:00
ucall.S
…
udbg_16550.c
powerpc: Add support for early debugging via Serial 16550 console
2022-09-28 19:22:09 +10:00
udbg.c
powerpc: Add support for early debugging via Serial 16550 console
2022-09-28 19:22:09 +10:00
uprobes.c
powerpc: Reject probes on instructions that can't be single stepped
2022-05-06 00:00:20 +10:00
vdso32_wrapper.S
powerpc/vdso: Merge vdso64 and vdso32 into a single directory
2022-02-12 22:47:43 +11:00
vdso64_wrapper.S
powerpc/vdso: Merge vdso64 and vdso32 into a single directory
2022-02-12 22:47:43 +11:00
vdso.c
- Yu Zhao's Multi-Gen LRU patches are here. They've been under test in
2022-10-10 17:53:04 -07:00
vecemu.c
powerpc/inst: Define ppc_inst_t
2021-12-09 22:41:21 +11:00
vector.S
powerpc/64: asm use consistent global variable declaration and access
2022-09-28 19:22:12 +10:00
vmlinux.lds.S
powerpc: Fix writable sections being moved into the rodata region
2022-11-16 21:37:14 +11:00
watchdog.c
powerpc/watchdog: introduce a NMI watchdog's factor
2022-07-27 21:36:02 +10:00