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linux/arch/powerpc/kernel
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Mahesh Salgaonkar e325d76f8b powerpc/powernv: Load correct TOC pointer while waking up from winkle. 
The function pnv_restore_hyp_resource() loads the TOC into r2 from
the invalid PACA pointer before fixing r13 value. This do not affect
POWER ISA 3.0 but it does have an impact on POWER ISA 2.07 or less
leading CPU to get stuck forever.

	login: [  471.830433] Processor 120 is stuck.

This can be easily reproducible using following steps:
- Turn off SMT
	$ ppc64_cpu --smt=off
- offline/online any online cpu (Thread 0 of any core which is online)
	$ echo 0 > /sys/devices/system/cpu/cpu<num>/online
	$ echo 1 > /sys/devices/system/cpu/cpu<num>/online

For POWER ISA 2.07 or less, the last bit of HSPRG0 is set indicating
that thread is waking up from winkle. Hence, the last bit of HSPRG0(r13)
needs to be clear before accessing it as PACA to avoid loading invalid
values from invalid PACA pointer.

Fix this by loading TOC after r13 register is corrected.

Fixes: bcef83a00dc4 ("powerpc/powernv: Add platform support for stop instruction")
Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>
Acked-by: Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-08-09 14:50:19 +10:00
..
vdso32
powerpc: enable UBSAN support
2016-01-20 17:09:18 -08:00
vdso64
powerpc: enable UBSAN support
2016-01-20 17:09:18 -08:00
.gitignore
…
align.c
powerpc: Move cpu_has_feature() to a separate file
2016-08-01 11:15:03 +10:00
asm-offsets.c
powerpc/8xx: Force VIRT_IMMR_BASE to be a positive number
2016-07-09 03:26:53 -05:00
audit.c
…
btext.c
powerpc/mm: Use a helper for finding pte bits mapping I/O area
2016-05-01 18:32:32 +10:00
cacheinfo.c
powerpc: Fix missing L2 cache size in /sys/devices/system/cpu
2015-04-11 20:49:28 +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/irq: Add support for HV virtualization interrupts
2016-07-17 16:42:44 +10:00
cpu_setup_ppc970.S
…
cputable.c
powerpc: Add option to use jump label for mmu_has_feature()
2016-08-01 11:15:06 +10:00
crash_dump.c
powerpc: Remove superfluous bootmem includes
2014-11-10 09:59:26 +11:00
crash.c
powerpc/crash: Rearrange loop condition to avoid out of bounds array access
2016-07-14 20:26:22 +10:00
dbell.c
powerpc/powernv: Fixes for hypervisor doorbell handling
2015-03-20 14:51:53 +11:00
dma-iommu.c
dma-mapping: use unsigned long for dma_attrs
2016-08-04 08:50:07 -04:00
dma-swiotlb.c
powerpc/iommu: Support "hybrid" iommu/direct DMA ops for coherent_mask < dma_mask
2015-07-13 10:10:55 +10:00
dma.c
dma-mapping: use unsigned long for dma_attrs
2016-08-04 08:50:07 -04:00
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/pci: Delay populating pdn
2016-06-21 15:30:56 +10:00
eeh_driver.c
powerpc fixes for 4.7 #5
2016-07-15 14:57:47 +10:00
eeh_event.c
powerpc: sparse: static-ify some things
2016-04-12 21:05:18 +10:00
eeh_pe.c
powerpc/eeh: fix misleading indentation
2016-04-27 09:19:37 +10:00
eeh_sysfs.c
powerpc/eeh: Fix PE state format
2014-11-27 09:32:58 +11:00
eeh.c
Revert "powerpc/eeh: Fix crash in eeh_add_device_early() on Cell"
2016-05-12 19:52:21 +10:00
entry_32.S
powerpc32: provide VIRT_CPU_ACCOUNTING
2016-07-09 01:43:50 -05:00
entry_64.S
powerpc/mm: Make MMU_FTR_RADIX a MMU family feature
2016-08-01 11:14:57 +10:00
epapr_hcalls.S
…
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
powerpc32: provide VIRT_CPU_ACCOUNTING
2016-07-09 01:43:50 -05:00
exceptions-64s.S
powerpc updates for 4.8 #2
2016-08-05 09:00:54 -04:00
fadump.c
powerpc/fadump: Fix build error introduced by recent cleanup
2016-07-05 23:49:46 +10:00
firmware.c
…
fpu.S
powerpc: Add the ability to save FPU without giving it up
2016-03-02 23:34:49 +11:00
fsl_booke_entry_mapping.S
powerpc/fsl: Force coherent memory on e500mc derivatives
2015-08-07 23:00:01 -05:00
ftrace.c
powerpc/ftrace: Separate the heuristics for checking call sites
2016-07-21 20:10:37 +10:00
head_8xx.S
powerpc/8xx: add CONFIG_PIN_TLB_IMMR
2016-07-09 02:02:48 -05:00
head_32.S
…
head_40x.S
powerpc: Remove check for CONFIG_SERIAL_TEXT_DEBUG
2014-06-11 16:31:21 +10:00
head_44x.S
powerpc: Fix misspellings in comments.
2016-03-01 19:27:20 +11:00
head_64.S
powerpc/64: Move the content of setup_system() to setup_arch()
2016-07-21 19:14:29 +10:00
head_booke.h
…
head_fsl_booke.S
powerpc/cache: add cache flush operation for various e500
2016-03-04 23:44:51 -06:00
hmi.c
KVM: PPC: Book3S HV: Fix TB corruption in guest exit path on HMI interrupt
2016-06-20 14:11:25 +10:00
hw_breakpoint.c
powerpc/hw_breakpoint: Fix oops when destroying hw_breakpoint event
2016-03-03 22:06:08 +11:00
ibmebus.c
dma-mapping: use unsigned long for dma_attrs
2016-08-04 08:50:07 -04:00
idle_6xx.S
…
idle_book3e.S
powerpc: No need to use dot symbols when branching to a function
2014-04-23 10:05:16 +10:00
idle_book3s.S
powerpc/powernv: Load correct TOC pointer while waking up from winkle.
2016-08-09 14:50:19 +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: No need to use dot symbols when branching to a function
2014-04-23 10:05:16 +10:00
idle.c
…
io-workarounds.c
powerpc/mm: Differentiate between hugetlb and THP during page walk
2015-10-12 15:30:09 +11:00
io.c
powerpc/powernv: Add PIO accessors for Power8 LPC bus
2013-08-14 14:58:08 +10:00
iomap.c
powerpc: add io{read,write}64 accessors
2016-05-31 16:41:52 +08:00
iommu.c
dma-mapping: use unsigned long for dma_attrs
2016-08-04 08:50:07 -04:00
irq.c
powerpc: Move cpu_has_feature() to a separate file
2016-08-01 11:15:03 +10:00
isa-bridge.c
powerpc/mm: Use a helper for finding pte bits mapping I/O area
2016-05-01 18:32:32 +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
kgdb.c
powerpc: Fix kgdb on little endian ppc64le
2016-02-18 00:03:26 +11:00
kprobes.c
powerpc/kprobes: Remove kretprobe_trampoline_holder.
2016-06-21 15:30:49 +10:00
kvm_emul.S
…
kvm.c
powerpc: Remove redundant breaks
2015-08-06 15:10:20 +10:00
l2cr_6xx.S
…
legacy_serial.c
powerpc: make of_device_ids const
2014-09-25 23:14:46 +10:00
machine_kexec_32.c
…
machine_kexec_64.c
powerpc/mm: Move hash table ops to a separate structure
2016-07-21 18:59:09 +10:00
machine_kexec.c
powerpc: Update of_remove_property() call sites to remove null checking
2016-05-11 21:54:04 +10:00
Makefile
- ARM: GICv3 ITS emulation and various fixes. Removal of the old
2016-08-02 16:11:27 -04:00
mce_power.c
powerpc/mm/radix: Fix CONFIG_PPC_MMU_STD_64 typo
2016-05-11 21:53:59 +10:00
mce.c
powerpc updates for 4.7
2016-05-20 10:12:41 -07:00
misc_32.S
powerpc/32: Get rid of sub_reloc_offset()
2016-06-14 13:58:26 +10:00
misc_64.S
powerpc/mm: Move hash table ops to a separate structure
2016-07-21 18:59:09 +10:00
misc.S
powerpc: Rename __get_SP() to current_stack_pointer()
2014-10-15 11:23:20 +11:00
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: Never restore r2 for a mprofile-kernel style mcount() call
2016-07-21 20:10:42 +10:00
module.c
powerpc/module: Only try to generate the ftrace_caller() stub once
2016-03-07 14:53:53 +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
pstore: add lzo/lz4 compression support
2016-06-02 10:59:31 -07:00
of_platform.c
powerpc/eeh: Do probe on pci_dn
2015-03-24 13:15:52 +11:00
paca.c
powerpc/mm: Convert early cpu/mmu feature check to use the new helpers
2016-08-01 11:15:01 +10:00
pci_32.c
powerpc: Remove more traces of bootmem
2014-11-19 21:41:51 +11:00
pci_64.c
powerpc fixes for 4.7 #5
2016-07-15 14:57:47 +10:00
pci_dn.c
powerpc/pci: Fix build with PCI_IOV=y and EEH=n
2016-07-07 16:33:27 +10:00
pci_of_scan.c
PCI/MSI: Initialize MSI capability for all architectures
2015-11-24 17:45:18 -06:00
pci-common.c
PCI changes for the v4.8 merge window:
2016-08-02 17:12:29 -04:00
pci-hotplug.c
powerpc/pci: Don't scan empty slot
2016-05-11 21:54:26 +10:00
pmc.c
…
ppc32.h
…
ppc_ksyms_32.c
powerpc32: Remove clear_pages() and define clear_page() inline
2016-03-11 17:20:11 -06:00
ppc_ksyms.c
powerpc32: move xxxxx_dcache_range() functions inline
2016-03-11 17:20:12 -06:00
ppc_save_regs.S
…
proc_powerpc.c
…
process.c
powerpc/process: Add the function flush_tmregs_to_thread
2016-08-01 11:15:15 +10:00
prom_init_check.sh
powerpc: Simplify symbol check in prom_init_check.sh
2014-09-25 23:14:46 +10:00
prom_init.c
powerpc/pseries: Fix IBM_ARCH_VEC_NRCORES_OFFSET since POWER8NVL was added
2016-06-08 10:40:05 +10:00
prom_parse.c
powerpc: of_parse_dma_window should take a __be32 *dma_window
2013-08-14 15:33:26 +10:00
prom.c
powerpc/mm: Make MMU_FTR_RADIX a MMU family feature
2016-08-01 11:14:57 +10:00
ptrace32.c
powerpc: move debug registers in a structure
2013-10-18 18:44:49 -05:00
ptrace.c
powerpc/ptrace: Enable support for Performance Monitor registers
2016-08-01 11:15:24 +10:00
reloc_32.S
…
reloc_64.S
powerpc: Align p_dyn, p_rela and p_st symbols
2014-03-07 13:50:19 +11:00
rtas_flash.c
powerpc: Fix endianness of flash_block_list in rtas_flash
2014-07-28 11:30:54 +10:00
rtas_pci.c
powerpc: move find_and_init_phbs() to pSeries specific code
2015-04-11 20:49:09 +10:00
rtas-proc.c
powerpc: Various typo fixes
2016-06-14 13:58:26 +10:00
rtas-rtc.c
…
rtas.c
powerpc: Make ppc_md.{halt, restart} __noreturn
2016-07-14 21:12:06 +10:00
rtasd.c
powerpc/pseries: start rtasd before PCI probing
2016-07-08 19:22:15 +10:00
setup_32.c
powerpc: Move cpu_has_feature() to a separate file
2016-08-01 11:15:03 +10:00
setup_64.c
powerpc/mm: Convert early cpu/mmu feature check to use the new helpers
2016-08-01 11:15:01 +10:00
setup-common.c
powerpc: Move cpu_has_feature() to a separate file
2016-08-01 11:15:03 +10:00
setup.h
powerpc: Merge 32-bit and 64-bit setup_arch()
2016-07-21 19:17:46 +10:00
signal_32.c
powerpc fixes for 4.4 #2
2015-12-14 20:40:32 +11:00
signal_64.c
powerpc: Avoid load hit store in setup_sigcontext()
2016-06-14 13:58:25 +10:00
signal.c
powerpc: Fix misspellings in comments.
2016-03-01 19:27:20 +11:00
signal.h
powerpc: Fix misspellings in comments.
2016-03-01 19:27:20 +11:00
smp-tbsync.c
powerpc: Delete non-required instances of include <linux/init.h>
2014-01-15 13:46:44 +11:00
smp.c
powerpc: Move cpu_has_feature() to a separate file
2016-08-01 11:15:03 +10:00
stacktrace.c
powerpc: Implement save_stack_trace_regs() to enable kprobe stack tracing
2016-01-11 14:27:28 +11:00
suspend.c
nosave: consolidate __nosave_{begin,end} in <asm/sections.h>
2014-10-09 22:26:04 -04:00
swsusp_32.S
…
swsusp_64.c
…
swsusp_asm64.S
powerpc: Only save/restore SDR1 if in hypervisor mode
2013-10-31 12:37:29 +11:00
swsusp_booke.S
powerpc/fsl-booke: Use SPRN_SPRGn rather than mfsprg/mtsprg
2014-01-07 19:06:03 -06:00
swsusp.c
powerpc/mm: Abstraction for switch_mmu_context()
2016-05-01 18:33:04 +10:00
sys_ppc32.c
…
syscalls.c
powerpc: Add a proper syscall for switching endianness
2015-03-28 22:03:40 +11:00
sysfs.c
powerpc/sparse: make some things static
2016-06-16 22:23:11 +10:00
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: Add a proper syscall for switching endianness
2015-03-28 22:03:40 +11:00
tau_6xx.c
…
time.c
RTC for 4.8
2016-08-05 09:48:22 -04:00
tm.S
powerpc/tm: Fix stack pointer corruption in __tm_recheckpoint()
2016-07-15 15:00:18 +10:00
trace_clock.c
powerpc/ftrace: add powerpc timebase as a trace clock source
2015-08-06 16:36:23 +10:00
traps.c
- ARM: GICv3 ITS emulation and various fixes. Removal of the old
2016-08-02 16:11:27 -04:00
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
uprobes/powerpc: Kill arch_uprobe->ainsn
2013-11-20 16:31:01 +01:00
vdso.c
vdso: make arch_setup_additional_pages wait for mmap_sem for write killable
2016-05-23 17:04:14 -07:00
vecemu.c
powerpc: Put FP/VSX and VR state into structures
2013-10-11 17:26:49 +11:00
vector.S
powerpc: Improve comment explaining why we modify VRSAVE
2016-07-26 14:16:19 +10:00
vio.c
dma-mapping: use unsigned long for dma_attrs
2016-08-04 08:50:07 -04:00
vmlinux.lds.S
powerpc/32: Remove RELOCATABLE_PPC32
2016-07-19 20:17:07 +10:00