AuxXxilium/linux_dsm_epyc7002
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c682e51dbc
linux_dsm_epyc7002/arch/arm/kernel
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Stephen Boyd c682e51dbc ARM: 7887/1: Don't smp_cross_call() on UP devices in arch_irq_work_raise() 
If we're running a kernel compiled with SMP_ON_UP=y and the
hardware only supports UP operation there isn't any
smp_cross_call function assigned. Unfortunately, we call
smp_cross_call() unconditionally in arch_irq_work_raise() and
crash the kernel on UP devices. Check to make sure we're running
on an SMP device before calling smp_cross_call() here.

Unable to handle kernel NULL pointer dereference at virtual address 00000000
pgd = c0004000
[00000000] *pgd=00000000
Internal error: Oops: 80000005 [#1] SMP ARM
Modules linked in:
CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.12.0-rc6-00018-g8d45144-dirty #16
task: de05b440 ti: de05c000 task.ti: de05c000
PC is at 0x0
LR is at arch_irq_work_raise+0x3c/0x48
pc : [<00000000>]    lr : [<c0019590>]    psr: 60000193
sp : de05dd60  ip : 00000001  fp : 00000000
r10: c085e2f0  r9 : de05c000  r8 : c07be0a4
r7 : de05c000  r6 : de05c000  r5 : c07c5778  r4 : c0824554
r3 : 00000000  r2 : 00000000  r1 : 00000006  r0 : c0529a58
Flags: nZCv  IRQs off  FIQs on  Mode SVC_32  ISA ARM Segment kernel
Control: 10c5387d  Table: 80004019  DAC: 00000017
Process swapper/0 (pid: 1, stack limit = 0xde05c248)
Stack: (0xde05dd60 to 0xde05e000)
dd60: c07b9dbc c00cb2dc 00000001 c08242c0 c08242c0 60000113 c07be0a8 c00b0590
dd80: de05c000 c085e2f0 c08242c0 c08242c0 c1414c28 c00b07cc de05b440 c1414c28
dda0: c08242c0 c00b0af8 c0862bb0 c0862db0 c1414cd8 de05c028 c0824840 de05ddb8
ddc0: 00000000 00000009 00000001 00000024 c07be0a8 c07be0a4 de05c000 c085e2f0
dde0: 00000000 c004a4b0 00000010 de00d2dc 00000054 00000100 00000024 00000000
de00: de05c028 0000000a ffff8ae7 00200040 00000016 de05c000 60000193 de05c000
de20: 00000054 00000000 00000000 00000000 00000000 c004a704 00000000 de05c008
de40: c07ba254 c004aa1c c07c5778 c0014b70 fa200000 00000054 de05de80 c0861244
de60: 00000000 c0008634 de05b440 c051c778 20000113 ffffffff de05deb4 c051d0a4
de80: 00000001 00000001 00000000 de05b440 c082afac de057ac0 de057ac0 de0443c0
dea0: 00000000 00000000 00000000 00000000 c082afbc de05dec8 c009f2a0 c051c778
dec0: 20000113 ffffffff 00000000 c016edb0 00000000 000002b0 de057ac0 de057ac0
dee0: 00000000 c016ee40 c0875e50 de05df2e de057ac0 00000000 00000013 00000000
df00: 00000000 c016f054 de043600 de0443c0 c008eb38 de004ec0 c0875e50 c008eb44
df20: 00000012 00000000 00000000 3931f0f8 00000000 00000000 00000014 c0822e84
df40: 00000000 c008ed2c 00000000 00000000 00000000 c07b7490 c07b7490 c075ab3c
df60: 00000000 c00701ac 00000002 00000000 c0070160 dffadb73 7bf8edb4 00000000
df80: c051092c 00000000 00000000 00000000 00000000 00000000 00000000 c0510934
dfa0: de05aa40 00000000 c051092c c0013ce8 00000000 00000000 00000000 00000000
dfc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
dfe0: 00000000 00000000 00000000 00000000 00000013 00000000 07efffe5 4dfac6f5
[<c0019590>] (arch_irq_work_raise+0x3c/0x48) from [<c00cb2dc>] (irq_work_queue+0xe4/0xf8)
[<c00cb2dc>] (irq_work_queue+0xe4/0xf8) from [<c00b0590>] (rcu_accelerate_cbs+0x1d4/0x1d8)
[<c00b0590>] (rcu_accelerate_cbs+0x1d4/0x1d8) from [<c00b07cc>] (rcu_start_gp+0x34/0x48)
[<c00b07cc>] (rcu_start_gp+0x34/0x48) from [<c00b0af8>] (rcu_process_callbacks+0x318/0x608)
[<c00b0af8>] (rcu_process_callbacks+0x318/0x608) from [<c004a4b0>] (__do_softirq+0x114/0x2a0)
[<c004a4b0>] (__do_softirq+0x114/0x2a0) from [<c004a704>] (do_softirq+0x6c/0x74)
[<c004a704>] (do_softirq+0x6c/0x74) from [<c004aa1c>] (irq_exit+0xac/0x100)
[<c004aa1c>] (irq_exit+0xac/0x100) from [<c0014b70>] (handle_IRQ+0x54/0xb4)
[<c0014b70>] (handle_IRQ+0x54/0xb4) from [<c0008634>] (omap3_intc_handle_irq+0x60/0x74)
[<c0008634>] (omap3_intc_handle_irq+0x60/0x74) from [<c051d0a4>] (__irq_svc+0x44/0x5c)
Exception stack(0xde05de80 to 0xde05dec8)
de80: 00000001 00000001 00000000 de05b440 c082afac de057ac0 de057ac0 de0443c0
dea0: 00000000 00000000 00000000 00000000 c082afbc de05dec8 c009f2a0 c051c778
dec0: 20000113 ffffffff
[<c051d0a4>] (__irq_svc+0x44/0x5c) from [<c051c778>] (_raw_spin_unlock_irq+0x28/0x2c)
[<c051c778>] (_raw_spin_unlock_irq+0x28/0x2c) from [<c016edb0>] (proc_alloc_inum+0x30/0xa8)
[<c016edb0>] (proc_alloc_inum+0x30/0xa8) from [<c016ee40>] (proc_register+0x18/0x130)
[<c016ee40>] (proc_register+0x18/0x130) from [<c016f054>] (proc_mkdir_data+0x44/0x6c)
[<c016f054>] (proc_mkdir_data+0x44/0x6c) from [<c008eb44>] (register_irq_proc+0x6c/0x128)
[<c008eb44>] (register_irq_proc+0x6c/0x128) from [<c008ed2c>] (init_irq_proc+0x74/0xb0)
[<c008ed2c>] (init_irq_proc+0x74/0xb0) from [<c075ab3c>] (kernel_init_freeable+0x84/0x1c8)
[<c075ab3c>] (kernel_init_freeable+0x84/0x1c8) from [<c0510934>] (kernel_init+0x8/0x150)
[<c0510934>] (kernel_init+0x8/0x150) from [<c0013ce8>] (ret_from_fork+0x14/0x2c)
Code: bad PC value

Fixes: bf18525fd7 "ARM: 7872/1: Support arch_irq_work_raise() via self IPIs"

Reported-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Tested-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2013-11-09 00:00:07 +00:00
..
.gitignore
arch_timer.c sched_clock: Make ARM's sched_clock generic for all architectures 2013-06-12 14:02:13 -07:00
armksyms.c Merge branches 'audit', 'delay', 'fixes', 'misc' and 'sta2x11' into for-linus 2012-07-27 23:06:32 +01:00
arthur.c
asm-offsets.c ARM: kernel: implement stack pointer save array through MPIDR hashing 2013-06-20 11:24:11 +01:00
atags_compat.c ARM: 7505/1: split out ATAGS parsing 2012-09-03 22:55:56 +01:00
atags_parse.c ARM: constify machine_desc structure uses 2013-07-26 14:55:59 +01:00
atags_proc.c procfs: new helper - PDE_DATA(inode) 2013-04-09 14:13:32 -04:00
atags.h ARM: constify machine_desc structure uses 2013-07-26 14:55:59 +01:00
bios32.c ARM: SoC platform changes for 3.12 2013-09-06 13:30:06 -07:00
calls.S ARM: 7665/1: Wire up kcmp syscall 2013-03-03 22:54:18 +00:00
cpuidle.c cpuidle: Add common time keeping and irq enabling 2012-03-21 01:59:40 -04:00
crash_dump.c
debug.S ARM: compile fix for DEBUG_LL=y && MMU=n 2013-01-16 14:30:06 -08:00
devtree.c Merge branch 'for-linus' of git://git.linaro.org/people/rmk/linux-arm 2013-09-05 18:07:32 -07:00
dma-isa.c
dma.c locking, ARM: Annotate low level hw locks as raw 2011-09-13 11:12:14 +02:00
early_printk.c early_printk: consolidate random copies of identical code 2013-04-29 18:28:13 -07:00
elf.c Disintegrate asm/system.h for ARM 2012-03-28 18:30:01 +01:00
entry-armv.S ARM: Fix !kuser helpers case 2013-08-07 14:00:11 +01:00
entry-common.S ARM: 7839/1: entry: fix tracing of ARM-private syscalls 2013-09-21 20:41:25 +01:00
entry-header.S arm: Fix build error with context tracking calls 2013-09-27 17:59:47 +02:00
entry-v7m.S ARM: 7800/1: ARMv7-M: Fix name of NVIC handler function 2013-07-31 11:12:58 +01:00
etm.c ARM/etm/sysrq: fix inconstistent help message of sysrq key 2013-04-30 17:04:10 -07:00
fiq.c ARM: 7819/1: fiq: Cast the first argument of flush_icache_range() 2013-08-20 00:11:50 +01:00
fiqasm.S
ftrace.c ARM: 7468/1: ftrace: Trace function entry before updating index 2012-07-31 10:30:42 +01:00
head-common.S arm: delete __cpuinit/__CPUINIT usage from all ARM users 2013-07-14 19:36:52 -04:00
head-nommu.S ARM: Add .text annotations where required after __CPUINIT removal 2013-08-01 14:41:40 +01:00
head.S ARM: 7846/1: Update SMP_ON_UP code to detect A9MPCore with 1 CPU devices 2013-10-03 10:39:44 +01:00
hw_breakpoint.c ARM: 7862/1: pcpu: replace __get_cpu_var_uses 2013-10-29 11:06:27 +00:00
hyp-stub.S ARM: 7786/1: hyp: fix macro parameterisation 2013-07-22 14:30:34 +01:00
insn.c ARM: fix missing bug.h include in arch/arm/kernel/insn.c 2012-03-30 11:51:46 +01:00
insn.h ARM: 7334/1: add jump label support 2012-03-24 09:38:56 +00:00
io.c arm: convert core files from module.h to export.h 2011-10-31 19:30:49 -04:00
irq.c ARM: irq: Call irqchip_init if no init_irq function is specified 2013-04-02 11:05:40 -07:00
isa.c
iwmmxt.S ARM: pxa: fix logic error in PJ4 iWMMXt handling 2011-08-11 10:10:26 +08:00
jump_label.c ARM: 7334/1: add jump label support 2012-03-24 09:38:56 +00:00
kgdb.c
kprobes-arm.c ARM: 7181/1: Restrict kprobes probing SWP instructions to ARMv5 and below 2011-11-30 23:54:54 +00:00
kprobes-common.c Disintegrate asm/system.h for ARM 2012-03-28 18:30:01 +01:00
kprobes-test-arm.c ARM: kprobes: make more tests conditional 2012-10-09 17:07:43 +02:00
kprobes-test-thumb.c ARM: 7174/1: Fix build error in kprobes test code on Thumb2 kernels 2011-11-26 21:58:53 +00:00
kprobes-test.c treewide: fix printk typo in multiple drivers 2012-11-19 11:08:17 +01:00
kprobes-test.h ARM: 7174/1: Fix build error in kprobes test code on Thumb2 kernels 2011-11-26 21:58:53 +00:00
kprobes-thumb.c ARM: 7423/1: kprobes: run t32_simulate_ldr_literal() without insn slot 2012-06-14 15:11:44 +01:00
kprobes.c ARM: 7862/1: pcpu: replace __get_cpu_var_uses 2013-10-29 11:06:27 +00:00
kprobes.h ARM: kprobes: Add exports for test code 2011-09-20 18:17:43 +00:00
machine_kexec.c ARM: 7815/1: kexec: offline non panic CPUs on Kdump panic 2013-08-20 00:14:46 +01:00
Makefile ARM: 7828/1: ARMv7-M: implement restart routine common to all v7-M machines 2013-09-02 13:49:29 +01:00
module.c ARM: 7829/1: Add ".text.unlikely" and ".text.hot" to arm unwind tables 2013-09-02 13:49:47 +01:00
opcodes.c ARM: 7206/1: Add generic ARM instruction set condition code checks. 2011-12-13 08:52:02 +00:00
patch.c ARM: 7332/1: extract out code patch function from kprobes 2012-03-24 09:38:55 +00:00
patch.h ARM: 7332/1: extract out code patch function from kprobes 2012-03-24 09:38:55 +00:00
perf_event_cpu.c ARM: 7862/1: pcpu: replace __get_cpu_var_uses 2013-10-29 11:06:27 +00:00
perf_event_v6.c ARM: perf: don't pretend to support counting of L1I writes 2013-01-16 12:01:59 +00:00
perf_event_v7.c ARM: 7663/1: perf: fix ARMv7 EVTYPE_MASK to include NSH bit 2013-03-03 22:54:17 +00:00
perf_event_xscale.c ARM: perf: don't pretend to support counting of L1I writes 2013-01-16 12:01:59 +00:00
perf_event.c ARM: 7810/1: perf: Fix array out of bounds access in armpmu_map_hw_event() 2013-08-13 20:21:44 +01:00
pj4-cp0.c arm: remove several unnecessary module.h include instances 2011-10-31 19:30:48 -04:00
process.c Merge branch 'security-fixes' into fixes 2013-08-13 20:23:28 +01:00
psci_smp.c arm: delete __cpuinit/__CPUINIT usage from all ARM users 2013-07-14 19:36:52 -04:00
psci.c arm: introduce psci_smp_ops 2013-05-21 14:24:11 +00:00
ptrace.c ptrace/arm: revert "hw_breakpoints: Fix racy access to ptrace breakpoints" 2013-07-09 10:33:25 -07:00
relocate_kernel.S ARM: 7065/1: kexec: ensure new kernel is entered in ARM state 2011-08-28 10:39:41 +01:00
return_address.c ARM: 7676/1: fix a wrong value returned from CALLER_ADDRn 2013-03-19 11:43:46 +00:00
setup.c ARM: 7864/1: Handle 64-bit memory in case of 32-bit phys_addr_t 2013-10-29 11:06:30 +00:00
signal.c ARM: fix nommu builds with 48be69a02 (ARM: move signal handlers into a vdso-like page) 2013-08-03 10:49:01 +01:00
sleep.S ARM: kernel: implement stack pointer save array through MPIDR hashing 2013-06-20 11:24:11 +01:00
smp_scu.c Merge branch 'for-next' of git://git.pengutronix.de/git/ukl/linux into devel-stable 2013-03-09 15:49:32 +00:00
smp_tlb.c ARM: 7855/1: Add check for Cortex-A15 errata 798181 ECO 2013-10-29 11:06:13 +00:00
smp_twd.c Now that we have a generic arch hook for broadcast we can remove the local 2013-07-23 16:54:15 -07:00
smp.c ARM: 7887/1: Don't smp_cross_call() on UP devices in arch_irq_work_raise() 2013-11-09 00:00:07 +00:00
stacktrace.c arm: convert core files from module.h to export.h 2011-10-31 19:30:49 -04:00
suspend.c ARM: kernel: implement stack pointer save array through MPIDR hashing 2013-06-20 11:24:11 +01:00
swp_emulate.c arm: single_open() leaks 2013-05-05 00:07:22 -04:00
sys_arm.c arm: switch to generic fork/vfork/clone 2012-11-28 22:13:54 -05:00
sys_oabi-compat.c userns: Convert stat to return values mapped from kuids and kgids 2012-05-15 14:08:35 -07:00
tcm.c ARM: 7694/1: ARM, TCM: initialize TCM in paging_init(), instead of setup_arch() 2013-04-17 16:53:24 +01:00
thumbee.c ARM: 7385/1: ThumbEE: Use cpuid macros to read ID_PFR0 for ThumbEE 2012-04-25 19:49:26 +01:00
time.c sched_clock: Make ARM's sched_clock generic for all architectures 2013-06-12 14:02:13 -07:00
topology.c ARM: topology: remove hwid/MPIDR dependency from cpu_capacity 2013-08-21 10:29:52 +01:00
traps.c Merge branch 'for-rmk/cacheflush-v2' of git://git.kernel.org/pub/scm/linux/kernel/git/will/linux into devel-stable 2013-08-28 18:38:40 +01:00
unwind.c ARM: unwinder: fix bisection to find origin in .idx section 2011-12-15 14:02:19 -08:00
v7m.c ARM: 7828/1: ARMv7-M: implement restart routine common to all v7-M machines 2013-09-02 13:49:29 +01:00
vmlinux.lds.S ARM: use linker magic for vectors and vector stubs 2013-07-31 21:34:24 +01:00
xscale-cp0.c arm: remove several unnecessary module.h include instances 2011-10-31 19:30:48 -04:00