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cb3042d609
linux/arch/sparc/kernel
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David S. Miller cb3042d609 sparc64: Make sure %pil interrupts are enabled during hypervisor yield. 
In arch_cpu_idle() we must enable %pil based interrupts before
potentially invoking the hypervisor cpu yield call.

As per the Hypervisor API documentation for cpu_yield:

	Interrupts which are blocked by some mechanism other that
	pstate.ie (for example %pil) are not guaranteed to cause
	a return from this service.

It seems that only first generation Niagara chips are hit by this
bug.  My best guess is that later chips implement this in hardware
and wake up anyways from %pil events, whereas in first generation
chips the yield is implemented completely in hypervisor code and
requires %pil to be enabled in order to wake properly from this
call.

Fixes: 87fa05aeb3 ("sparc: Use generic idle loop")
Reported-by: Fabio M. Di Nitto <fabbione@fabbione.net>
Reported-by: Jan Engelhardt <jengelh@inai.de>
Tested-by: Jan Engelhardt <jengelh@inai.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-03-24 14:45:12 -04:00
..
.gitignore
apc.c sparc idle: rename pm_idle to sparc_idle 2013-02-17 23:36:56 -05:00
asm-offsets.c [PATCH] sparc32: vm_area_struct access for old Sun SPARCs. 2013-07-10 13:56:10 -07:00
audit.c
auxio_32.c sparc32: Remove sun4 and sun4c from enum sparc_cpu. 2012-05-12 00:23:23 -07:00
auxio_64.c sparc: remove __devinit, __devexit annotations 2013-01-12 15:28:45 -08:00
btext.c
central.c sparc: remove __devinit, __devexit annotations 2013-01-12 15:28:45 -08:00
cherrs.S
chmc.c sparc: remove __devinit, __devexit annotations 2013-01-12 15:28:45 -08:00
compat_audit.c
cpu.c sparc64: correctly recognize SPARC64-X chips 2013-03-11 05:06:27 -07:00
cpumap.c sparc: delete non-required instances of include <linux/init.h> 2014-01-28 23:38:23 -08:00
cpumap.h
devices.c sparc32: remove sun4c traps 2012-05-11 19:27:46 -07:00
dma.c
ds.c sparc: fix ldom_reboot buffer overflow harder 2013-10-02 20:01:56 -04:00
dtlb_miss.S
dtlb_prot.S
ebus.c sparc: delete non-required instances of include <linux/init.h> 2014-01-28 23:38:23 -08:00
entry.h sparc64: Implement HAVE_CONTEXT_TRACKING 2013-11-14 14:57:21 -08:00
entry.S sparc32: Fix exit flag passed from traced sys_sigreturn 2013-07-31 19:10:04 -07:00
etrap_32.S sparc32: introduce support for run-time patching for all shared assembler code 2012-05-27 23:52:49 -07:00
etrap_64.S sparc64: clear syscall_noerror on the entry to syscall, not on the exit 2012-10-14 19:26:52 -04:00
fpu_traps.S
ftrace.c
getsetcc.S
head_32.S sparc32: drop swapper_pg_dir 2012-07-26 16:46:15 -07:00
head_64.S sparc64: correctly recognize SPARC64-X chips 2013-03-11 05:06:27 -07:00
helpers.S
hvapi.c sparc: fix format string argument for prom_printf() 2012-10-02 23:20:34 -04:00
hvcalls.S sparc64: Add hypervisor interfaces for SPARC-T4 perf counter access. 2012-08-18 23:03:53 -07:00
hvtramp.S sparc: delete non-required instances of include <linux/init.h> 2014-01-28 23:38:23 -08:00
idprom.c sparc: Clear out unused asm/machines.h values. 2012-05-11 20:45:18 -07:00
iommu_common.h
iommu.c sparc/PCI: Use dev_is_pci() to identify PCI devices 2014-01-04 17:55:19 -08:00
ioport.c sparc/PCI: Use dev_is_pci() to identify PCI devices 2014-01-04 17:55:19 -08:00
irq_32.c sparc32: handle leon in irq_32.c 2012-05-27 23:52:44 -07:00
irq_64.c irq: Consolidate do_softirq() arch overriden implementations 2013-10-01 12:53:25 +02:00
irq.h sparc32: remove runtime btfix support 2012-05-14 14:05:09 -07:00
itlb_miss.S
ivec.S
jump_label.c sparc: Fix even more fallout from system.h split. 2012-03-29 22:40:52 -07:00
kernel.h sparc32: refactor smp boot 2013-02-20 13:36:50 -08:00
kgdb_32.c sparc: explicitly include sched.h to get task_thread_info declaration 2013-02-06 11:04:10 -08:00
kgdb_64.c sparc64: Fix build regression 2013-12-03 11:51:51 -05:00
kprobes.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2013-11-15 16:47:22 -08:00
kstack.h
ktlb.S sparc64: Make PAGE_OFFSET variable. 2013-11-12 15:22:34 -08:00
ldc.c sparc: remove deprecated IRQF_DISABLED 2013-10-02 20:02:35 -04:00
led.c
leon_kernel.c sparc32, leon: Remove separate "ticker" timer for SMP 2013-06-19 02:10:29 -07:00
leon_pci_grpci1.c sparc,leon: Convert to use devm_ioremap_resource 2013-06-19 02:10:30 -07:00
leon_pci_grpci2.c sparc32,leon: add support for PCI busn resource for GRPCI2 2013-03-20 11:06:53 -07:00
leon_pci.c sparc32,leon: add support for PCI busn resource for GRPCI2 2013-03-20 11:06:53 -07:00
leon_pmc.c sparc32, leon: Enable interrupts before going idle to avoid getting stuck 2013-06-19 02:10:29 -07:00
leon_smp.c sparc: delete __cpuinit/__CPUINIT usage from all users 2013-07-14 19:36:52 -04:00
Makefile sparc: fix MSI build failure on Sparc32 2013-10-02 20:02:35 -04:00
mdesc.c sparc: delete __cpuinit/__CPUINIT usage from all users 2013-07-14 19:36:52 -04:00
misctrap.S
module.c mm/arch: use NUMA_NO_NODE 2013-11-13 12:09:05 +09:00
nmi.c sparc64: Abstract away the %pcr values used to enable/disable NMI 2012-08-18 23:26:19 -07:00
of_device_32.c sparc32: rename sparc_irq_config to sparc_config 2012-04-15 10:28:49 -07:00
of_device_64.c devicetree: add helper inline for retrieving a node's full name 2012-07-06 07:16:34 -05:00
of_device_common.c sparc: delete non-required instances of include <linux/init.h> 2014-01-28 23:38:23 -08:00
of_device_common.h
pci_common.c sparc: delete non-required instances of include <linux/init.h> 2014-01-28 23:38:23 -08:00
pci_fire.c sparc: remove __devinit, __devexit annotations 2013-01-12 15:28:45 -08:00
pci_impl.h drivers/of: Constify device_node->name and ->path_component_name 2012-11-17 12:05:57 +00:00
pci_msi.c
pci_psycho.c sparc: remove __devinit, __devexit annotations 2013-01-12 15:28:45 -08:00
pci_sabre.c sparc: remove __devinit, __devexit annotations 2013-01-12 15:28:45 -08:00
pci_schizo.c sparc: remove __devinit, __devexit annotations 2013-01-12 15:28:45 -08:00
pci_sun4v_asm.S
pci_sun4v.c sparc: remove __devinit, __devexit annotations 2013-01-12 15:28:45 -08:00
pci_sun4v.h
pci.c sparc: don't use module_init in non-modular pci.c code 2014-01-28 23:38:24 -08:00
pcic.c sparc: remove __devinit, __devexit annotations 2013-01-12 15:28:45 -08:00
pcr.c sparc64: Add PCR ops for SPARC-T4. 2012-08-18 23:26:19 -07:00
perf_event.c sparc64: Make montmul/montsqr/mpmul usable in 32-bit threads. 2012-10-26 15:18:37 -07:00
pmc.c sparc idle: rename pm_idle to sparc_idle 2013-02-17 23:36:56 -05:00
power.c sparc: remove __devinit, __devexit annotations 2013-01-12 15:28:45 -08:00
process_32.c sparc: delete non-required instances of include <linux/init.h> 2014-01-28 23:38:23 -08:00
process_64.c sparc64: Make sure %pil interrupts are enabled during hypervisor yield. 2014-03-24 14:45:12 -04:00
prom_32.c
prom_64.c of: Make cpu node handling more portable. 2013-10-15 20:09:10 +01:00
prom_common.c of: Fix locking vs. interrupts 2013-06-13 22:12:14 +01:00
prom_irqtrans.c
prom.h
psycho_common.c
psycho_common.h
ptrace_32.c Disintegrate asm/system.h for Sparc 2012-03-28 18:30:03 +01:00
ptrace_64.c sparc64: Implement HAVE_CONTEXT_TRACKING 2013-11-14 14:57:21 -08:00
reboot.c Disintegrate asm/system.h for Sparc 2012-03-28 18:30:03 +01:00
rtrap_32.S sparc32: introduce support for run-time patching for all shared assembler code 2012-05-27 23:52:49 -07:00
rtrap_64.S Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2013-11-19 10:40:00 -08:00
sbus.c sparc: kernel/sbus.c: fix memory leakage 2013-01-21 14:33:00 -08:00
setup_32.c sparc: kernel: using strlcpy() instead of strcpy() 2013-06-19 02:10:29 -07:00
setup_64.c cpu hw caps support for sparc64x 2013-07-31 19:10:03 -07:00
signal32.c constify copy_siginfo_to_user{,32}() 2013-11-09 00:16:29 -05:00
signal_32.c sparc: convert to ksignal 2013-02-14 09:21:16 -05:00
signal_64.c sparc64: Implement HAVE_CONTEXT_TRACKING 2013-11-14 14:57:21 -08:00
sigutil_32.c Disintegrate asm/system.h for Sparc 2012-03-28 18:30:03 +01:00
sigutil_64.c Disintegrate asm/system.h for Sparc 2012-03-28 18:30:03 +01:00
sigutil.h
smp_32.c sparc: delete __cpuinit/__CPUINIT usage from all users 2013-07-14 19:36:52 -04:00
smp_64.c sparc64: smp_callin: Enable irqs after preemption is disabled 2014-01-04 17:55:19 -08:00
sparc_ksyms_32.c sparc: delete non-required instances of include <linux/init.h> 2014-01-28 23:38:23 -08:00
sparc_ksyms_64.c sparc: delete non-required instances of include <linux/init.h> 2014-01-28 23:38:23 -08:00
spiterrs.S
sstate.c
stacktrace.c
starfire.c
sun4d_irq.c Include missing linux/slab.h inclusions 2013-04-29 15:42:01 -04:00
sun4d_smp.c sparc: delete __cpuinit/__CPUINIT usage from all users 2013-07-14 19:36:52 -04:00
sun4m_irq.c sparc32: remove remaining users of btfixup 2012-05-14 14:05:08 -07:00
sun4m_smp.c sparc: delete __cpuinit/__CPUINIT usage from all users 2013-07-14 19:36:52 -04:00
sun4v_ivec.S
sun4v_tlb_miss.S sparc64: Move from 4MB to 8MB huge pages. 2013-11-12 15:22:34 -08:00
sys32.S unify compat fanotify_mark(2), switch to COMPAT_SYSCALL_DEFINE 2013-05-09 13:46:38 -04:00
sys_sparc32.c kernel-wide: fix missing validations on __get/__put/__copy_to/__copy_from_user() 2013-09-11 15:58:18 -07:00
sys_sparc_32.c sparc: switch to use of generic old sigaction 2013-02-03 22:43:35 -05:00
sys_sparc_64.c sparc64: Implement HAVE_CONTEXT_TRACKING 2013-11-14 14:57:21 -08:00
syscalls.S sparc64: don't treat 64-bit syscall return codes as 32-bit 2014-03-17 15:54:52 -04:00
sysfs.c sparc: delete __cpuinit/__CPUINIT usage from all users 2013-07-14 19:36:52 -04:00
systbls_32.S sparc: Hook up sched_setattr and sched_getattr syscalls. 2014-01-29 00:45:06 -08:00
systbls_64.S sparc: Hook up sched_setattr and sched_getattr syscalls. 2014-01-29 00:45:06 -08:00
systbls.h sparc: switch to generic old sigsuspend 2013-02-03 22:44:37 -05:00
tadpole.c
time_32.c sparc: remove __devinit, __devexit annotations 2013-01-12 15:28:45 -08:00
time_64.c sparc: remove __devinit, __devexit annotations 2013-01-12 15:28:45 -08:00
trampoline_32.S sparc: delete non-required instances of include <linux/init.h> 2014-01-28 23:38:23 -08:00
trampoline_64.S sparc: delete non-required instances of include <linux/init.h> 2014-01-28 23:38:23 -08:00
traps_32.c taint: add explicit flag to show whether lock dep is still OK. 2013-01-21 17:17:57 +10:30
traps_64.c sparc64: Implement HAVE_CONTEXT_TRACKING 2013-11-14 14:57:21 -08:00
tsb.S sparc64: Move from 4MB to 8MB huge pages. 2013-11-12 15:22:34 -08:00
ttable_32.S sparc32: move trap table to a separate file 2012-05-19 23:27:25 -07:00
ttable_64.S sparc64: renamed ttable.S to ttable_64.S 2012-05-19 23:26:41 -07:00
una_asm_32.S
una_asm_64.S
unaligned_32.c Disintegrate asm/system.h for Sparc 2012-03-28 18:30:03 +01:00
unaligned_64.c sparc64: Implement HAVE_CONTEXT_TRACKING 2013-11-14 14:57:21 -08:00
utrap.S
vio.c sparc/kernel/vio.c: add put_device() after device_find_child() 2013-05-04 17:38:18 -07:00
viohs.c
visemul.c sparc64: Make montmul/montsqr/mpmul usable in 32-bit threads. 2012-10-26 15:18:37 -07:00
vmlinux.lds.S sparc64: Make PAGE_OFFSET variable. 2013-11-12 15:22:34 -08:00
windows.c
winfixup.S sparc64: Make montmul/montsqr/mpmul usable in 32-bit threads. 2012-10-26 15:18:37 -07:00
wof.S sparc32: introduce support for run-time patching for all shared assembler code 2012-05-27 23:52:49 -07:00
wuf.S sparc32: introduce support for run-time patching for all shared assembler code 2012-05-27 23:52:49 -07:00