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linux/arch/powerpc/kernel
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Paul Mackerras d04c56f73c [POWERPC] Lazy interrupt disabling for 64-bit machines 
This implements a lazy strategy for disabling interrupts.  This means
that local_irq_disable() et al. just clear the 'interrupts are
enabled' flag in the paca.  If an interrupt comes along, the interrupt
entry code notices that interrupts are supposed to be disabled, and
clears the EE bit in SRR1, clears the 'interrupts are hard-enabled'
flag in the paca, and returns.  This means that interrupts only
actually get disabled in the processor when an interrupt comes along.

When interrupts are enabled by local_irq_enable() et al., the code
sets the interrupts-enabled flag in the paca, and then checks whether
interrupts got hard-disabled.  If so, it also sets the EE bit in the
MSR to hard-enable the interrupts.

This has the potential to improve performance, and also makes it
easier to make a kernel that can boot on iSeries and on other 64-bit
machines, since this lazy-disable strategy is very similar to the
soft-disable strategy that iSeries already uses.

This version renames paca->proc_enabled to paca->soft_enabled, and
changes a couple of soft-disables in the kexec code to hard-disables,
which should fix the crash that Michael Ellerman saw.  This doesn't
yet use a reserved CR field for the soft_enabled and hard_enabled
flags.  This applies on top of Stephen Rothwell's patches to make it
possible to build a combined iSeries/other kernel.

Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-10-16 16:31:36 +10:00
..
vdso32 [PATCH] vDSO hash-style fix 2006-07-31 13:28:43 -07:00
vdso64 [PATCH] vDSO hash-style fix 2006-07-31 13:28:43 -07:00
align.c [PATCH] powerpc: Implement support for setting little-endian mode via prctl 2006-06-09 21:24:15 +10:00
asm-offsets.c [POWERPC] Lazy interrupt disabling for 64-bit machines 2006-10-16 16:31:36 +10:00
audit.c [PATCH] audit: AUDIT_PERM support 2006-09-11 13:32:30 -04:00
binfmt_elf32.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
btext.c [POWERPC] Constify & voidify get_property() 2006-07-31 15:55:04 +10:00
compat_audit.c [PATCH] audit: AUDIT_PERM support 2006-09-11 13:32:30 -04:00
cpu_setup_6xx.S Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
cpu_setup_ppc970.S Merge branch 'merge' 2006-08-25 14:56:07 +10:00
cputable.c [POWERPC] POWER6 has 6 PMCs 2006-10-16 15:53:30 +10:00
crash.c [POWERPC] Lazy interrupt disabling for 64-bit machines 2006-10-16 16:31:36 +10:00
crash_dump.c [POWERPC] Make doc comments extractable 2006-08-08 17:07:04 +10:00
dma_64.c [POWERPC] Simplify dma_ops bug conditions 2006-07-31 15:55:06 +10:00
entry_32.S Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
entry_64.S [POWERPC] Lazy interrupt disabling for 64-bit machines 2006-10-16 16:31:36 +10:00
firmware.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
fpu.S [POWERPC] Restore copyright notice in arch/powerpc/kernel/fpu.S 2006-08-30 14:45:35 +10:00
head_4xx.S Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
head_8xx.S Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
head_32.S Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
head_44x.S Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
head_64.S [POWERPC] Lazy interrupt disabling for 64-bit machines 2006-10-16 16:31:36 +10:00
head_booke.h [PATCH] powerpc: Fix Kernel FP unavail exception for BookE 2006-02-10 16:51:50 +11:00
head_fsl_booke.S Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
ibmebus.c IRQ: Use the new typedef for interrupt handler function pointers 2006-10-09 12:19:47 +01:00
idle.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
idle_6xx.S Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
idle_power4.S [POWERPC] Lazy interrupt disabling for 64-bit machines 2006-10-16 16:31:36 +10:00
init_task.c [PATCH] nsproxy: move init_nsproxy into kernel/nsproxy.c 2006-10-02 07:57:20 -07:00
io.c [POWERPC] Merge iSeries i/o operations with the rest 2006-09-22 15:19:58 +10:00
iomap.c [PATCH] powerpc: remove io_page_mask 2006-04-22 18:45:05 +10:00
iommu.c [POWERPC] Fix harmless typo 2006-10-06 21:10:40 +10:00
irq.c [POWERPC] Lazy interrupt disabling for 64-bit machines 2006-10-16 16:31:36 +10:00
kprobes.c [PATCH] kretprobe spinlock deadlock patch 2006-10-02 07:57:16 -07:00
l2cr_6xx.S Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
legacy_serial.c Merge branch 'merge' 2006-08-25 14:56:07 +10:00
lparcfg.c [POWERPC] clean up pseries hcall interfaces 2006-08-01 16:19:15 +10:00
lparmap.c [PATCH] powerpc: Fix iSeries bug in VMALLOCBASE/VMALLOC_START consolidation 2006-01-09 15:06:06 +11:00
machine_kexec.c [POWERPC] Move some kexec logic into machine_kexec.c 2006-08-17 16:41:10 +10:00
machine_kexec_32.c Storage class should be first 2006-06-26 18:57:34 +02:00
machine_kexec_64.c Merge branch 'merge' 2006-08-25 14:56:07 +10:00
Makefile [POWERPC] convert string i/o operations to C 2006-09-20 14:06:18 +10:00
misc.S [POWERPC] convert string i/o operations to C 2006-09-20 14:06:18 +10:00
misc_32.S [PATCH] rename the provided execve functions to kernel_execve 2006-10-02 07:57:23 -07:00
misc_64.S IRQ: Maintain regs pointer globally rather than passing to IRQ handlers 2006-10-05 15:10:12 +01:00
module_32.c powerpc: Move module.c over to arch/powerpc 2006-03-27 19:28:58 +11:00
module_64.c [PATCH] powerpc64: Fix loading of modules without a .toc section 2006-04-28 21:04:49 +10:00
nvram_64.c [PATCH] nvram_print_partitions cosmetic fixup 2006-04-29 18:08:05 +10:00
of_device.c [POWERPC] Remove linux,device properties 2006-07-07 20:19:16 +10:00
paca.c [POWERPC] Implement SLB shadow buffer 2006-08-08 17:08:56 +10:00
pci_32.c [POWERPC] Fix IO Window Updates on P2P bridges. 2006-10-16 15:53:30 +10:00
pci_64.c [POWERPC] Check for offline nodes in pci NUMA code 2006-10-16 15:53:30 +10:00
pci_direct_iommu.c [POWERPC] cleanup dma_mapping_ops 2006-06-15 19:31:26 +10:00
pci_dn.c [POWERPC] Constify & voidify get_property() 2006-07-31 15:55:04 +10:00
pci_iommu.c [POWERPC] cleanup dma_mapping_ops 2006-06-15 19:31:26 +10:00
perfmon_fsl_booke.c fix file specification in comments 2006-10-03 23:01:26 +02:00
pmc.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
ppc32.h powerpc: move include/asm-ppc64/ppc32.h to arch/powerpc/kernel 2005-11-03 16:03:28 +11:00
ppc_ksyms.c [POWERPC] Lazy interrupt disabling for 64-bit machines 2006-10-16 16:31:36 +10:00
proc_ppc64.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
process.c [POWERPC] Better check in show_instructions 2006-10-16 15:53:30 +10:00
prom.c [POWERPC] Minor fix for bootargs property 2006-10-06 21:10:41 +10:00
prom_init.c Merge branch 'merge' 2006-08-31 15:45:48 +10:00
prom_parse.c Revert "[POWERPC] Don't get PCI IRQ from OF for devices with no IRQ" 2006-10-08 15:38:22 -07:00
ptrace-common.h Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
ptrace.c [POWERPC] Fix PPC32 SECCOMP, unexport do_syscall_trace_{enter,leave} 2006-09-26 15:24:34 +10:00
ptrace32.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
rtas-proc.c [POWERPC] Constify & voidify get_property() 2006-07-31 15:55:04 +10:00
rtas-rtc.c [PATCH] powerpc: reorg RTAS delay code 2006-06-09 21:21:06 +10:00
rtas.c [POWERPC] reboot when panic_timout is set 2006-08-25 13:30:26 +10:00
rtas_flash.c [PATCH] powerpc: reorg RTAS delay code 2006-06-09 21:21:06 +10:00
rtas_pci.c [POWERPC] Add a helper for calculating RTAS "config_addr" parameters 2006-08-25 13:27:35 +10:00
semaphore.c powerpc: Merge enough to start building in arch/powerpc. 2005-09-26 16:04:21 +10:00
setup-common.c [POWERPC] Fix xmon=off and cleanup xmon initialisation 2006-10-04 14:52:22 +10:00
setup.h [PATCH] powerpc: Make early xmon logic immune to location of early parsing 2006-05-19 15:02:12 +10:00
setup_32.c [POWERPC] Fix xmon=off and cleanup xmon initialisation 2006-10-04 14:52:22 +10:00
setup_64.c [POWERPC] Lazy interrupt disabling for 64-bit machines 2006-10-16 16:31:36 +10:00
signal_32.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
signal_64.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
smp-tbsync.c [POWERPC] Fix irq enable/disable in smp_generic_take_timebase 2006-08-30 16:10:47 +10:00
smp.c IRQ: Maintain regs pointer globally rather than passing to IRQ handlers 2006-10-05 15:10:12 +01:00
swsusp_32.S [PATCH] Change the name of pagedir_nosave 2006-09-26 08:49:01 -07:00
sys_ppc32.c [PATCH] VFS: Make filldir_t and struct kstat deal in 64-bit inode numbers 2006-10-03 08:03:40 -07:00
syscalls.c [PATCH] namespaces: utsname: switch to using uts namespaces 2006-10-02 07:57:21 -07:00
sysfs.c [POWERPC] Always call cede in pseries dedicated idle loop 2006-09-26 15:24:34 +10:00
systbl.S Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
tau_6xx.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
time.c [POWERPC] Fix up after irq changes 2006-10-07 22:08:26 +10:00
traps.c [POWERPC] Never panic when taking altivec exceptions from userspace 2006-10-16 15:53:30 +10:00
udbg.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
udbg_16550.c [POWERPC] Fix default clock for udbg_16550 2006-07-26 01:27:13 +10:00
vdso.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
vecemu.c [PATCH] powerpc: Move arch/ppc*/kernel/vecemu.c to arch/powerpc 2005-09-21 19:21:07 +10:00
vector.S Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
vio.c [POWERPC] Constify & voidify get_property() 2006-07-31 15:55:04 +10:00
vmlinux.lds.S [POWERPC] implement BEGIN/END_FW_FTR_SECTION 2006-10-03 16:50:21 +10:00