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298b34d7d5
linux/arch/powerpc/platforms
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Benjamin Herrenschmidt 298b34d7d5 powerpc/powernv: Fix kexec races going back to OPAL 
We have a subtle race when sending CPUs back to OPAL on kexec.

We mark them as "in real mode" right before we send them down. Once
we've booted the new kernel, it might try to call opal_reinit_cpus()
to change endianness, and that requires all CPUs to be spinning inside
OPAL.

However there is no synchronization here and we've observed cases
where the returning CPUs hadn't established their new state inside
OPAL before opal_reinit_cpus() is called, causing it to fail.

The proper fix is to actually wait for them to go down all the way
from the kexec'ing kernel.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-04-28 13:08:50 +10:00
..
8xx powerpc: Remove unused REDBOOT Kconfig parameter 2013-12-30 14:17:00 +11:00
40x Removal of GENERIC_GPIO for v3.10 2013-05-09 09:59:16 -07:00
44x usb: host: remove selects of USB_ARCH_HAS_?HCI 2014-02-18 12:36:38 -08:00
52xx Merge remote-tracking branch 'agust/next' into next 2014-01-29 16:53:55 +11:00
82xx powerpc: add explicit OF includes 2013-10-09 20:04:11 -05:00
83xx powerpc: Delete non-required instances of include <linux/init.h> 2014-01-15 13:46:44 +11:00
85xx fsl/pci: The new pci suspend/resume implementation 2014-03-19 22:37:44 -05:00
86xx powerpc: add explicit OF includes 2013-10-09 20:04:11 -05:00
512x powerpc/512x: clk: support MPC5121/5123/5125 SoC variants 2014-01-12 18:59:36 +01:00
amigaone
cell arch/powerpc: Use RCU_INIT_POINTER(x, NULL) in platforms/cell/spu_syscalls.c 2014-04-09 12:53:40 +10:00
chrp powerpc: Delete non-required instances of include <linux/init.h> 2014-01-15 13:46:44 +11:00
embedded6xx powerpc/kconfig: Remove TSI108_BRIDGE duplicates 2014-03-19 16:14:44 -05:00
maple POWERPC: drivers: remove __dev* attributes. 2013-01-03 15:57:04 -08:00
pasemi powerpc: Delete non-required instances of include <linux/init.h> 2014-01-15 13:46:44 +11:00
powermac powerpc: Delete non-required instances of include <linux/init.h> 2014-01-15 13:46:44 +11:00
powernv powerpc/powernv: Fix kexec races going back to OPAL 2014-04-28 13:08:50 +10:00
ps3 Merge branch 'powernv-cpuidle' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc 2014-04-02 13:47:29 -07:00
pseries powerpc: Fix Oops in rtas_stop_self() 2014-04-28 13:08:47 +10:00
wsp powerpc/iommu: Add it_page_shift field to determine iommu page size 2013-12-30 14:17:13 +11:00
fsl_uli1575.c of/irq: Refactor interrupt-map parsing 2013-10-24 11:43:04 +01:00
Kconfig powerpc: Better split CONFIG_PPC_INDIRECT_PIO and CONFIG_PPC_INDIRECT_MMIO 2013-08-14 14:57:50 +10:00
Kconfig.cputype ppc: make PPC_BOOK3S_64 select IRQ_WORK 2014-04-07 16:36:09 -07:00
Makefile