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2621e945fb
linux/arch/powerpc/kernel
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Michael Ellerman 2621e945fb powerpc/kexec: Fix kexec/kdump in P9 guest kernels 
The code that cleans up the IAMR/AMOR before kexec'ing failed to
remember that when we're running as a guest AMOR is not writable, it's
hypervisor privileged.

They symptom is that the kexec stops before entering purgatory and
nothing else is seen on the console. If you examine the state of the
system all threads will be in the 0x700 program check handler.

Fix it by making the write to AMOR dependent on HV mode.

Fixes: 1e2a516e89 ("powerpc/kexec: Fix radix to hash kexec due to IAMR/AMOR")
Cc: stable@vger.kernel.org # v4.10+
Reported-by: Yilin Zhang <yilzhang@redhat.com>
Debugged-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Acked-by: Balbir Singh <bsingharora@gmail.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Tested-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-11-24 16:49:37 +11:00
..
trace Merge branch 'fixes' into next 2017-11-10 20:55:03 +11:00
vdso32 powerpc/time: refactor MFTB() to limit number of ifdefs 2017-08-10 23:32:09 +10:00
vdso64 powerpc/vdso64: Use double word compare on pointers 2016-09-29 15:17:57 +10:00
.gitignore
align.c powerpc: Fix check for copy/paste instructions in alignment handler 2017-10-25 12:42:35 +02:00
asm-offsets.c powerpc/64s: mm_context.addr_limit is only used on hash 2017-11-13 23:35:43 +11:00
audit.c
btext.c powerpc: Convert to using %pOF instead of full_name 2017-08-23 22:27:04 +10:00
cacheinfo.c powerpc: Convert to using %pOF instead of full_name 2017-08-23 22:27:04 +10:00
cacheinfo.h
compat_audit.c
cpu_setup_6xx.S powerpc: Various typo fixes 2016-06-14 13:58:26 +10:00
cpu_setup_44x.S
cpu_setup_fsl_booke.S powerpc/cache: add cache flush operation for various e500 2016-03-04 23:44:51 -06:00
cpu_setup_pa6t.S
cpu_setup_power.S powerpc/powernv: Fix local TLB flush for boot and MCE on POWER9 2017-07-11 12:53:53 +10:00
cpu_setup_ppc970.S
cputable.c powerpc/64s: Fix Power9 DD2.0 workarounds by adding DD2.1 feature 2017-11-15 14:25:42 +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/fadump: remove dependency with CONFIG_KEXEC 2017-05-08 17:15:11 -07:00
dbell.c powerpc: Introduce msgsnd/doorbell barrier primitives 2017-04-13 23:34:33 +10:00
dma-iommu.c powerpc: implement ->mapping_error 2017-06-28 06:54:33 -07:00
dma-swiotlb.c treewide: Constify most dma_map_ops structures 2017-01-24 12:23:35 -05:00
dma.c powerpc: merge __dma_set_mask into dma_set_mask 2017-06-28 06:54:55 -07:00
dt_cpu_ftrs.c powerpc/64s: Fix Power9 DD2.1 logic in DT CPU features 2017-11-22 23:17:01 +11:00
eeh_cache.c powerpc/eeh: Fix pr_debug()s in eeh_cache.c 2016-07-08 22:09:50 +10:00
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: Stop using do_gettimeofday() 2017-11-06 17:40:00 +11:00
eeh_event.c powerpc/pci: Always print PHB and PE numbers as hexadecimal 2016-11-22 11:57:07 +11:00
eeh_pe.c powerpc/eeh: Stop using do_gettimeofday() 2017-11-06 17:40:00 +11:00
eeh_sysfs.c powerpc/eeh: Remove unnecessary config_addr from eeh_dev 2017-08-31 14:26:09 +10:00
eeh.c powerpc/powernv: Rework EEH initialization on powernv 2017-09-26 11:19:07 +10:00
entry_32.S powerpc/32: Avoid risk of unrecoverable TLBmiss inside entry_32.S 2017-08-15 22:55:53 +10:00
entry_64.S powerpc/64s: Replace CONFIG_PPC_STD_MMU_64 with CONFIG_PPC_BOOK3S_64 2017-11-06 16:48:14 +11:00
epapr_hcalls.S ppc: move exports to definitions 2016-08-07 23:50:09 -04:00
epapr_paravirt.c
exceptions-64e.S powerpc/64e: Fix hang when debugging programs with relocated kernel 2017-04-30 01:05:18 -05:00
exceptions-64s.S powerpc/64s: Fix masking of SRR1 bits on instruction fault 2017-11-14 15:48:47 +11:00
fadump.c powerpc/fadump: use kstrtoint to handle sysfs store 2017-11-13 10:51:38 +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
head_8xx.S powerpc/8xx: Reduce DTLB miss handler by one insn 2017-08-15 22:55:55 +10:00
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/powernv: Avoid waiting for secondary hold spinloop with OPAL 2017-11-10 22:00:54 +11:00
head_booke.h
head_fsl_booke.S ppc: move exports to definitions 2016-08-07 23:50:09 -04:00
hw_breakpoint.c Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/scottwood/linux into next 2017-02-18 21:37:14 +11:00
idle_6xx.S
idle_book3e.S
idle_book3s.S powerpc/64s: Fix Power9 DD2.0 workarounds by adding DD2.1 feature 2017-11-15 14:25:42 +11:00
idle_e500.S
idle_power4.S
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: Move isa bridge definitions to separate include 2017-01-31 13:54:17 +11:00
iommu.c powerpc/iommu: Use permission-specific DEVICE_ATTR variants 2017-09-01 16:42:54 +10:00
irq.c powerpc/64: Fix latency tracing for lazy irq replay 2017-11-06 16:48:07 +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
kexec_elf_64.c powerpc: ima: send the kexec buffer to the next kernel 2016-12-20 09:48:44 -08:00
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: refactor kprobe_lookup_name for safer string operations 2017-11-12 23:51:43 +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 powerpc: Convert to using %pOF instead of full_name 2017-08-23 22:27:04 +10:00
machine_kexec_32.c
machine_kexec_64.c powerpc/64s: Replace CONFIG_PPC_STD_MMU_64 with CONFIG_PPC_BOOK3S_64 2017-11-06 16:48:14 +11:00
machine_kexec_file_64.c powerpc: ima: send the kexec buffer to the next kernel 2016-12-20 09:48:44 -08:00
machine_kexec.c powerpc: Update of_remove_property() call sites to remove null checking 2016-05-11 21:54:04 +10:00
Makefile powerpc/64s: ppc_save_regs is now needed for all 64s builds 2017-11-12 23:44:36 +11:00
mce_power.c Merge branch 'fixes' into next 2017-11-10 20:55:03 +11:00
mce.c powerpc/mce: hookup memory_failure for UE errors 2017-10-16 23:12:02 +11:00
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/kexec: Fix kexec/kdump in P9 guest kernels 2017-11-24 16:49:37 +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/modules: Use WARN_ON() in stub_for_addr() 2017-10-13 19:41:57 +11:00
module.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
msi.c
nvram_64.c powerpc/nvram: use memdup_user 2017-06-27 17:02:50 -07:00
of_platform.c powerpc: Convert to using %pOF instead of full_name 2017-08-23 22:27:04 +10:00
optprobes_head.S powerpc/kprobes: Don't save/restore DAR/DSISR to/from pt_regs for optprobes 2017-08-24 16:19:01 +10:00
optprobes.c powerpc/kprobes: Do not disable interrupts for optprobes and kprobes_on_ftrace 2017-11-12 23:51:41 +11:00
paca.c powerpc/64s: mm_context.addr_limit is only used on hash 2017-11-13 23:35:43 +11:00
pci_32.c powerpc: Convert to using %pOF instead of full_name 2017-08-23 22:27:04 +10:00
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: Remove OF node back pointer from pci_dn 2017-08-31 14:26:12 +10:00
pci_of_scan.c powerpc: Convert to using %pOF instead of full_name 2017-08-23 22:27:04 +10:00
pci-common.c powerpc: Convert to using %pOF instead of full_name 2017-08-23 22:27:04 +10:00
pci-hotplug.c powerpc/pci: Don't scan empty slot 2016-05-11 21:54:26 +10:00
pmc.c
ppc32.h
ppc_save_regs.S
proc_powerpc.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
process.c powerpc: Define set_thread_uses_vas() 2017-11-12 09:03:09 +11:00
prom_init_check.sh
prom_init.c powerpc/xive: add XIVE Exploitation Mode to CAS 2017-09-02 21:02:38 +10:00
prom_parse.c
prom.c powerpc/64s: Replace CONFIG_PPC_STD_MMU_64 with CONFIG_PPC_BOOK3S_64 2017-11-06 16:48:14 +11:00
ptrace32.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
ptrace.c powerpc/tm: Flush TM only if CPU has TM feature 2017-09-20 13:30:09 +10:00
reloc_32.S
reloc_64.S powerpc/asm: Convert .llong directives to .8byte 2017-08-31 14:26:47 +10:00
rtas_flash.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
rtas_pci.c powerpc/kernel: Change retrieval of pci_dn 2017-08-31 14:26:40 +10:00
rtas-proc.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
rtas-rtc.c
rtas.c mm: treewide: remove GFP_TEMPORARY allocation flag 2017-09-13 18:53:16 -07:00
rtasd.c powerpc: Only obtain cpu_hotplug_lock if called by rtasd 2017-06-23 09:32:11 +02:00
setup_32.c powerpc/32: remove a NOP from memset() 2017-09-01 16:42:46 +10:00
setup_64.c powerpc/64: Set DSCR default initially from SPR 2017-11-10 22:11:35 +11:00
setup-common.c powerpc/64s: mm_context.addr_limit is only used on hash 2017-11-13 23:35:43 +11:00
setup.h powerpc/64: Set DSCR default initially from SPR 2017-11-10 22:11:35 +11:00
signal_32.c powerpc: Always save/restore checkpointed regs during treclaim/trecheckpoint 2017-11-06 20:39:33 +11:00
signal_64.c powerpc: Always save/restore checkpointed regs during treclaim/trecheckpoint 2017-11-06 20:39:33 +11:00
signal.c powerpc/signal: Properly handle return value from uprobe_deny_signal() 2017-11-13 10:53:05 +11:00
signal.h powerpc: tm: Rename transct_(*) to ck(\1)_state 2016-10-04 20:33:16 +11:00
smp-tbsync.c
smp.c powerpc/smp: Add Power9 scheduler topology 2017-08-31 18:16:08 +10:00
stacktrace.c powerpc: Make /proc/self/stack always print the current stack 2017-03-28 14:43:59 +11:00
suspend.c
swsusp_32.S
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
swsusp.c powerpc/swsusp: Include suspend.h to silence sparse warnings 2017-03-20 19:02:49 +11:00
sys_ppc32.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
syscalls.c powerpc/tracing: Allow tracing of mmap syscalls 2017-04-12 22:32:43 +10:00
sysfs.c powerpc/64: Set DSCR default initially from SPR 2017-11-10 22:11:35 +11:00
systbl_chk.c
systbl_chk.sh
systbl.S powerpc/asm: Convert .llong directives to .8byte 2017-08-31 14:26:47 +10:00
tau_6xx.c powerpc/6xx: Use setup_timer() helper 2017-10-04 11:28:02 +11:00
time.c powerpc: use spin loop primitives in some functions 2017-07-02 20:40:24 +10:00
tm.S powerpc: Always save/restore checkpointed regs during treclaim/trecheckpoint 2017-11-06 20:39:33 +11:00
traps.c powerpc: Remove facility loadups on transactional {fp, vec, vsx} unavailable 2017-11-06 20:39:34 +11:00
udbg_16550.c
udbg.c
uprobes.c powerpc/uprobes: Implement arch_uretprobe_is_alive() 2017-08-24 16:19:21 +10:00
vdso.c powerpc/64: Clean up ppc64_caches using a struct per cache 2017-02-06 19:46:04 +11:00
vecemu.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
vector.S Merge branch 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild 2016-10-14 14:26:58 -07:00
vmlinux.lds.S powerpc/mm: Implement STRICT_KERNEL_RWX on PPC32 2017-08-15 22:55:57 +10:00
watchdog.c powerpc/watchdog: Do not trigger SMP crash from touch_nmi_watchdog 2017-10-04 11:26:02 +11:00