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1739ea9e13
linux/arch/powerpc/kernel
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Sam bobroff 1739ea9e13 powerpc: Fix regression of per-CPU DSCR setting 
Since commit "efcac65 powerpc: Per process DSCR + some fixes (try#4)"
it is no longer possible to set the DSCR on a per-CPU basis.

The old behaviour was to minipulate the DSCR SPR directly but this is no
longer sufficient: the value is quickly overwritten by context switching.

This patch stores the per-CPU DSCR value in a kernel variable rather than
directly in the SPR and it is used whenever a process has not set the DSCR
itself. The sysfs interface (/sys/devices/system/cpu/cpuN/dscr) is unchanged.

Writes to the old global default (/sys/devices/system/cpu/dscr_default)
now set all of the per-CPU values and reads return the last written value.

The new per-CPU default is added to the paca_struct and is used everywhere
outside of sysfs.c instead of the old global default.

Signed-off-by: Sam Bobroff <sam.bobroff@au1.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-05-28 13:35:40 +10:00
..
vdso32 powerpc/booke64: Use SPRG7 for VDSO 2014-03-19 19:57:14 -05:00
vdso64 powerpc/booke64: Use SPRG7 for VDSO 2014-03-19 19:57:14 -05:00
.gitignore
align.c powerpc: Add lq/stq emulation 2014-04-09 12:53:28 +10:00
asm-offsets.c powerpc: Fix regression of per-CPU DSCR setting 2014-05-28 13:35:40 +10:00
audit.c
btext.c powerpc/btext: Fix CONFIG_PPC_EARLY_DEBUG_BOOTX on ppc32 2013-08-27 16:01:23 +10:00
cacheinfo.c powerpc/pseries: Update dynamic cache nodes for suspend/resume operation 2014-03-07 15:54:49 +11:00
cacheinfo.h
compat_audit.c
cpu_setup_6xx.S
cpu_setup_44x.S
cpu_setup_a2.S
cpu_setup_fsl_booke.S powerpc: No need to use dot symbols when branching to a function 2014-04-23 10:05:16 +10:00
cpu_setup_pa6t.S
cpu_setup_power.S powerpc/ppc64: Do not turn AIL (reloc-on interrupts) too early 2014-04-07 10:33:15 +10:00
cpu_setup_ppc970.S
cputable.c powerpc: Add a cpu feature CPU_FTR_PMAO_BUG 2014-03-24 09:48:24 +11:00
crash_dump.c powerpc/crashdump : Fix page frame number check in copy_oldmem_page 2014-02-28 18:06:25 +11:00
crash.c powerpc: Delete non-required instances of include <linux/init.h> 2014-01-15 13:46:44 +11:00
dbell.c powerpc: Add accounting for Doorbell interrupts 2013-04-18 15:59:55 +10:00
dma-iommu.c powerpc/iommu: Update the generic code to use dynamic iommu page sizes 2013-12-30 14:17:19 +11:00
dma-swiotlb.c
dma.c powerpc/powernv: Add iommu DMA bypass support for IODA2 2014-02-11 16:07:37 +11:00
eeh_cache.c powerpc/eeh: Remove reference to PCI device 2013-07-24 14:18:46 +10:00
eeh_dev.c powerpc/eeh: Move common part to kernel directory 2013-06-20 17:05:35 +10:00
eeh_driver.c powerpc/eeh: Can't recover from non-PE-reset case 2014-04-28 17:35:01 +10:00
eeh_event.c powerpc/eeh: More accurate log 2013-11-21 10:33:36 +11:00
eeh_pe.c powerpc/eeh: No hotplug on permanently removed dev 2014-04-28 17:34:32 +10:00
eeh_sysfs.c powerpc/eeh: Introdce flag to protect sysfs 2013-07-24 14:18:49 +10:00
eeh.c powerpc/eeh: Fix build error for celleb 2014-05-20 10:54:04 +10:00
entry_32.S powerpc/32bit:Store temporary result in r0 instead of r8 2013-06-01 08:29:27 +10:00
entry_64.S powerpc: Fix regression of per-CPU DSCR setting 2014-05-28 13:35:40 +10:00
epapr_hcalls.S powerpc: Add paravirt idle loop for 64-bit Book-E 2013-03-13 14:19:36 -05:00
epapr_paravirt.c PPC: ePAPR: Fix hypercall on LE guest 2014-05-22 18:08:33 -05:00
exceptions-64e.S powerpc: Remove dot symbol usage in exception macros 2014-04-23 10:05:19 +10:00
exceptions-64s.S powerpc: Remove dot symbol usage in exception macros 2014-04-23 10:05:19 +10:00
fadump.c arch: powerpc/fadump: Cleaning up inconsistent NULL checks 2014-05-28 13:35:39 +10:00
firmware.c
fpu.S powerpc: Don't corrupt transactional state when using FP/VMX in kernel 2014-01-15 13:59:11 +11:00
fsl_booke_entry_mapping.S powerpc: enable the relocatable support for the fsl booke 32bit kernel 2014-01-09 17:52:16 -06:00
ftrace.c powerpc/ftrace: Fix ABIv2 issues with __ftrace_make_call 2014-04-23 10:05:35 +10:00
head_8xx.S powerpc/8xx: Fixing issue with CONFIG_PIN_TLB 2013-10-28 21:11:21 -05:00
head_32.S
head_40x.S powerpc: Remove the empty giveup_fpu() function on 32bit kernel 2013-08-14 14:59:50 +10:00
head_44x.S powerpc: Remove the empty giveup_fpu() function on 32bit kernel 2013-08-14 14:59:50 +10:00
head_64.S powerpc: Fix SMP issues with ppc64le ABIv2 2014-04-23 10:05:26 +10:00
head_booke.h powerpc: Fix interrupt range check on debug exception 2013-05-02 10:31:01 +10:00
head_fsl_booke.S powerpc/fsl_booke: smp support for booting a relocatable kernel above 64M 2014-01-09 17:52:18 -06:00
hw_breakpoint.c powerpc: Fix smp_processor_id() in preemptible splat in set_breakpoint 2014-05-20 10:54:06 +10:00
ibmebus.c PPC: ibmebus: convert bus code to use bus_groups 2013-09-26 15:49:42 -07:00
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_e500.S
idle_power4.S powerpc: No need to use dot symbols when branching to a function 2014-04-23 10:05:16 +10:00
idle_power7.S powerpc/powernv: Make it possible to skip the IRQHAPPENED check in power7_nap() 2014-05-28 13:35:35 +10:00
idle.c powerpc/idle: Convert use of typedef ctl_table to struct ctl_table 2013-07-01 11:10:35 +10:00
io-workarounds.c powerpc: Better split CONFIG_PPC_INDIRECT_PIO and CONFIG_PPC_INDIRECT_MMIO 2013-08-14 14:57:50 +10:00
io.c powerpc/powernv: Add PIO accessors for Power8 LPC bus 2013-08-14 14:58:08 +10:00
iomap.c powerpc: Delete non-required instances of include <linux/init.h> 2014-01-15 13:46:44 +11:00
iommu.c powerpc/powernv: Add iommu DMA bypass support for IODA2 2014-02-11 16:07:37 +11:00
irq.c powerpc: Irq: Use generic_handle_irq 2014-03-04 17:37:52 +01:00
isa-bridge.c POWERPC: drivers: remove __dev* attributes. 2013-01-03 15:57:04 -08:00
jump_label.c
kgdb.c powerpc: Delete non-required instances of include <linux/init.h> 2014-01-15 13:46:44 +11:00
kprobes.c doc: typo on word accounting in kprobes.c in mutliple architectures 2013-10-14 15:46:39 +02:00
kvm_emul.S
kvm.c kvm/powerpc: rename kvm_hypercall() to epapr_hypercall() 2014-01-09 10:14:56 +01:00
l2cr_6xx.S
legacy_serial.c powerpc/legacy_serial: Support MVME5100 UARTS with shifted registers 2014-04-28 17:36:25 +10:00
machine_kexec_32.c
machine_kexec_64.c powerpc, kexec: Fix "Processor X is stuck" issue during kexec from ST mode 2014-05-28 13:24:26 +10:00
machine_kexec.c powerpc: Fix endian issues in kexec and crash dump code 2014-02-11 11:24:52 +11:00
Makefile clk: mpc5xxx: switch to COMMON_CLK, retire PPC_CLOCK 2014-01-12 18:53:04 +01:00
mce_power.c powerpc/book3s: Recover from MC in sapphire on SCOM read via MMIO. 2014-03-07 15:52:10 +11:00
mce.c powerpc/book3s: Recover from MC in sapphire on SCOM read via MMIO. 2014-03-07 15:52:10 +11:00
misc_32.S powerpc: Set the correct ksp_limit on ppc32 when switching to irq stack 2014-02-17 11:19:34 +11:00
misc_64.S powerpc: module: handle MODVERSION for .TOC. 2014-04-23 10:05:28 +10:00
misc.S
module_32.c powerpc: Move local setup.h declarations to arch includes 2013-10-30 16:00:31 +11:00
module_64.c powerpc/module: Fix stubs for BE 2014-05-20 10:56:01 +10:00
module.c powerpc: Move local setup.h declarations to arch includes 2013-10-30 16:00:31 +11:00
msi.c
nvram_64.c arch/powerpc/kernel: Use %12.12s instead of %12s to avoid memory overflow 2013-11-25 11:50:57 +11:00
of_platform.c powerpc/eeh: Fix crash when adding a device in a slot with DDW 2013-01-10 17:01:58 +11:00
paca.c powerpc/ppc64: Gracefully handle early interrupts 2014-04-07 10:33:15 +10:00
pci_32.c powerpc/pci: Support per-aperture memory offset 2013-05-06 13:40:40 +10:00
pci_64.c powerpc/PCI: Fix NULL dereference in sys_pciconfig_iobase() list traversal 2014-04-14 16:33:49 -06:00
pci_dn.c powerpc: Make PCI device node device tree accesses endian safe 2013-08-14 15:33:31 +10:00
pci_of_scan.c powerpc/eeh: No hotplug on permanently removed dev 2014-04-28 17:34:32 +10:00
pci-common.c powerpc/pci: Use of_pci_range_parser helper in pci_process_bridge_OF_ranges 2014-04-28 17:36:29 +10:00
pci-hotplug.c powerpc/pci: Partial tree hotplug support 2013-07-24 14:18:48 +10:00
pmc.c
ppc32.h powerpc: switch to generic old sigaction() 2013-02-03 18:16:10 -05:00
ppc_ksyms.c powerpc: memcpy optimization for 64bit LE 2014-04-30 15:26:18 +10:00
ppc_save_regs.S
proc_powerpc.c proc_powerpc: switch to fixed_size_llseek() 2013-06-29 12:57:50 +04:00
process.c powerpc: Fix smp_processor_id() in preemptible splat in set_breakpoint 2014-05-20 10:54:06 +10:00
prom_init_check.sh powerpc: Ignore .TOC. relocations 2014-04-23 10:05:21 +10:00
prom_init.c powerpc: Check return value of instance-to-package OF call 2014-01-13 09:49:17 +11:00
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/prom: early_init_dt_scan_cpus() updates cpu features only once 2014-04-07 10:33:14 +10:00
ptrace32.c powerpc: move debug registers in a structure 2013-10-18 18:44:49 -05:00
ptrace.c powerpc: PTRACE_PEEKUSR always returns FPR0 2013-12-13 15:48:33 +11:00
reloc_32.S powerpc: Don't flush/invalidate the d/icache for an unknown relocation type 2013-07-01 11:10:34 +10:00
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 error return in rtas_flash module init 2014-04-28 16:32:07 +10:00
rtas_pci.c powerpc/eeh: Block PCI-CFG access during PE reset 2014-04-28 17:34:02 +10:00
rtas-proc.c
rtas-rtc.c
rtas.c powerpc/le: Enable RTAS events support 2014-04-07 10:33:12 +10:00
rtasd.c powerpc/le: Enable RTAS events support 2014-04-07 10:33:12 +10:00
setup_32.c powerpc: Make boot_cpuid common between 32 and 64-bit 2014-04-07 10:33:14 +10:00
setup_64.c powerpc: Fix SMP issues with ppc64le ABIv2 2014-04-23 10:05:26 +10:00
setup-common.c powerpc: Add threads_per_subcore 2014-05-28 13:35:35 +10:00
signal_32.c powerpc/tm: Disable IRQ in tm_recheckpoint 2014-04-07 10:33:13 +10:00
signal_64.c powerpc/tm: Disable IRQ in tm_recheckpoint 2014-04-07 10:33:13 +10:00
signal.c powerpc: Fix smp_processor_id() in preemptible splat in set_breakpoint 2014-05-20 10:54:06 +10:00
signal.h powerpc/tm: Fix userspace stack corruption on signal delivery for active transactions 2013-06-01 08:29:23 +10:00
smp-tbsync.c powerpc: Delete non-required instances of include <linux/init.h> 2014-01-15 13:46:44 +11:00
smp.c powerpc: Check cpu_thread_in_subcore() in __cpu_up() 2014-05-28 13:35:36 +10:00
stacktrace.c
suspend.c
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
sys_ppc32.c unify compat fanotify_mark(2), switch to COMPAT_SYSCALL_DEFINE 2013-05-09 13:46:38 -04:00
syscalls.c powerpc: Delete non-required instances of include <linux/init.h> 2014-01-15 13:46:44 +11:00
sysfs.c powerpc: Fix regression of per-CPU DSCR setting 2014-05-28 13:35:40 +10:00
systbl_chk.c
systbl_chk.sh
systbl.S powerpc: Create DOTSYM to wrap dot symbol usage 2014-04-23 10:05:19 +10:00
tau_6xx.c
time.c powerpc: irq work racing with timer interrupt can result in timer interrupt hang 2014-05-12 14:29:28 +10:00
tm.S powerpc: Fix regression of per-CPU DSCR setting 2014-05-28 13:35:40 +10:00
traps.c powerpc: Add lq/stq emulation 2014-04-09 12:53:28 +10:00
udbg_16550.c powerpc/wsp: Fix early debug build 2013-08-16 10:59:27 +10:00
udbg.c powerpc: Add a configuration option for early BootX/OpenFirmware debug 2013-06-20 16:55:12 +10:00
uprobes.c uprobes/powerpc: Kill arch_uprobe->ainsn 2013-11-20 16:31:01 +01:00
vdso.c powerpc/booke64: Use SPRG7 for VDSO 2014-03-19 19:57:14 -05:00
vecemu.c powerpc: Put FP/VSX and VR state into structures 2013-10-11 17:26:49 +11:00
vector.S powerpc: Don't corrupt transactional state when using FP/VMX in kernel 2014-01-15 13:59:11 +11:00
vio.c powerpc: Revert c6102609 and replace it with the correct fix for vio dma mask setting 2014-03-07 15:50:12 +11:00
vmlinux.lds.S powerpc/modules: Module CRC relocation fix causes perf issues 2013-07-24 14:18:43 +10:00