Michael Ellerman e7fda7e569 powerpc/64s: Remove MSR_RI optimisation in system_call_exit() ... Currently in system_call_exit() we have an optimisation where we disable MSR_RI (recoverable interrupt) and MSR_EE (external interrupt enable) in a single mtmsrd instruction. Unfortunately this will no longer work with THREAD_INFO_IN_TASK, because then the load of TI_FLAGS might fault and faulting with MSR_RI clear is treated as an unrecoverable exception which leads to a panic(). So change the code to only clear MSR_EE prior to loading TI_FLAGS, leaving the clear of MSR_RI until later. We have some latitude in where do the clear of MSR_RI. A bit of experimentation has shown that this location gives the least slow down. This still causes a noticeable slow down in our null_syscall performance. On a Power9 DD2.2: Before After Delta Delta % 955 cycles 999 cycles -44 -4.6% On the plus side this does simplify the code somewhat, because we don't have to reenable MSR_RI on the restore_math() or syscall_exit_work() paths which was necessitated previously by the optimisation. Reviewed-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>		2019-02-23 22:31:39 +11:00
..
syscalls	powerpc: add system call table generation support	2018-12-21 14:46:50 +11:00
trace	powerpc: Enable kcov	2019-02-23 21:04:32 +11:00
vdso32	powerpc: Enable kcov	2019-02-23 21:04:32 +11:00
vdso64	powerpc: Enable kcov	2019-02-23 21:04:32 +11:00
.gitignore	…
Makefile	powerpc: Enable kcov	2019-02-23 21:04:32 +11:00
align.c	Remove 'type' argument from access_ok() function	2019-01-03 18:57:57 -08:00
asm-offsets.c	powerpc/6xx: Don't use SPRN_SPRG2 for storing stack pointer while in RTAS	2019-02-22 00:10:16 +11:00
audit.c	…
btext.c	powerpc: Rework btext_find_display to use of_stdout and device_type helpers	2018-11-26 22:33:37 +11:00
cacheinfo.c	powerpc: Use device_type helpers to access the node type	2018-11-26 22:33:37 +11:00
cacheinfo.h	…
compat_audit.c	…
cpu_setup_6xx.S	powerpc/6xx: Store PGDIR physical address in a SPRG	2019-02-22 00:10:16 +11:00
cpu_setup_44x.S	…
cpu_setup_fsl_booke.S	powerpc/mm: move platform specific mmu-xxx.h in platform directories	2018-12-04 19:45:01 +11:00
cpu_setup_pa6t.S	…
cpu_setup_power.S	…
cpu_setup_ppc970.S	…
cputable.c	powerpc/83xx: handle machine check caused by watchdog timer	2018-12-21 20:56:41 -06:00
crash.c	…
crash_dump.c	…
dbell.c	…
dma-iommu.c	powerpc/dma: use the dma_direct mapping routines	2019-02-18 22:41:04 +11:00
dma-mask.c	dma-mapping, powerpc: simplify the arch dma_set_mask override	2019-02-18 22:41:03 +11:00
dma-swiotlb.c	powerpc/dma: use the generic direct mapping bypass	2019-02-18 22:41:04 +11:00
dt_cpu_ftrs.c	powerpc/64s: Fix logic when handling unknown CPU features	2019-02-22 00:10:15 +11:00
eeh.c	powerpc/eeh: Add eeh_force_recover to debugfs	2019-02-22 00:10:15 +11:00
eeh_cache.c	powerpc/eeh_cache: Bump log level of eeh_addr_cache_print()	2019-02-22 00:10:14 +11:00
eeh_dev.c	…
eeh_driver.c	powerpc/eeh: Improve recovery of passed-through devices	2019-02-05 11:55:44 +11:00
eeh_event.c	powerpc/eeh: Add eeh_force_recover to debugfs	2019-02-22 00:10:15 +11:00
eeh_pe.c	powerpc/eeh: Add include_passed to eeh_pe_state_clear()	2019-02-05 11:55:43 +11:00
eeh_sysfs.c	powerpc/eeh: Add include_passed to eeh_pe_state_clear()	2019-02-05 11:55:43 +11:00
entry_32.S	powerpc/32: Fix CONFIG_VIRT_CPU_ACCOUNTING_NATIVE for 40x/booke	2019-02-22 00:10:16 +11:00
entry_64.S	powerpc/64s: Remove MSR_RI optimisation in system_call_exit()	2019-02-23 22:31:39 +11:00
epapr_hcalls.S	…
epapr_paravirt.c	…
exceptions-64e.S	powerpc/fsl: Flush the branch predictor at each kernel entry (64bit)	2018-12-20 22:59:03 +11:00
exceptions-64s.S	powerpc updates for 4.21	2018-12-27 10:43:24 -08:00
fadump.c	powerpc/fadump: Do not allow hot-remove memory from fadump reserved area.	2018-12-21 11:32:49 +11:00
firmware.c	…
fpu.S	…
fsl_booke_entry_mapping.S	…
head_8xx.S	powerpc/kconfig: make _etext and data areas alignment configurable on 8xx	2019-02-23 21:04:32 +11:00
head_32.S	powerpc/mm/32s: add setibat() clearibat() and update_bats()	2019-02-23 21:04:32 +11:00
head_40x.S	powerpc: simplify BDI switch	2019-02-22 00:10:16 +11:00
head_44x.S	powerpc/44x: use patch_sites for TLB handlers patching	2018-12-19 18:56:32 +11:00
head_64.S	…
head_booke.h	powerpc/fsl: Fixed warning: orphan section `__btb_flush_fixup'	2018-12-30 14:00:47 +11:00
head_fsl_booke.S	powerpc/fsl: Flush the branch predictor at each kernel entry (32 bit)	2018-12-20 22:59:03 +11:00
hw_breakpoint.c	…
idle.c	…
idle_6xx.S	…
idle_book3e.S	…
idle_book3s.S	…
idle_e500.S	…
idle_power4.S	…
ima_kexec.c	…
io-workarounds.c	…
io.c	…
iomap.c	…
iommu.c	IOMMU Updates for Linux v4.21	2019-01-01 15:55:29 -08:00
irq.c	powerpc/irq: drop arch_early_irq_init()	2019-01-14 20:39:27 +11:00
isa-bridge.c	powerpc: Use device_type helpers to access the node type	2018-11-26 22:33:37 +11:00
jump_label.c	jump_label: move 'asm goto' support test to Kconfig	2019-01-06 09:46:51 +09:00
kexec_elf_64.c	…
kgdb.c	kgdb/treewide: constify struct kgdb_arch arch_kgdb_ops	2018-12-30 08:33:06 +00:00
kprobes-ftrace.c	…
kprobes.c	…
kvm.c	…
kvm_emul.S	…
l2cr_6xx.S	…
legacy_serial.c	powerpc: Use of_node_name_eq for node name comparisons	2018-12-22 21:29:50 +11:00
machine_kexec.c	…
machine_kexec_32.c	…
machine_kexec_64.c	…
machine_kexec_file_64.c	powerpc, kexec_file: factor out memblock-based arch_kexec_walk_mem()	2018-12-06 14:38:50 +00:00
mce.c	powerpc/64s: Better printing of machine check info for guest MCEs	2019-02-21 23:16:45 +11:00
mce_power.c	…
misc.S	…
misc_32.S	powerpc: change CONFIG_6xx to CONFIG_PPC_BOOK3S_32	2018-11-26 22:33:37 +11:00
misc_64.S	…
module.c	…
module.lds	…
module_32.c	…
module_64.c	…
msi.c	powerpc/msi: Fix NULL pointer access in teardown code	2018-11-29 23:49:11 +11:00
nvram_64.c	pstore improvements and refactorings	2018-12-27 11:15:21 -08:00
of_platform.c	…
optprobes.c	…
optprobes_head.S	…
paca.c	memblock: stop using implicit alignment to SMP_CACHE_BYTES	2018-10-31 08:54:16 -07:00
pci-common.c	powerpc/pci: Add pci_find_controller_for_domain()	2019-02-22 00:10:14 +11:00
pci-hotplug.c	…
pci_32.c	memblock: stop using implicit alignment to SMP_CACHE_BYTES	2018-10-31 08:54:16 -07:00
pci_64.c	…
pci_dn.c	…
pci_of_scan.c	powerpc: Use device_type helpers to access the node type	2018-11-26 22:33:37 +11:00
pmc.c	powerpc: change CONFIG_6xx to CONFIG_PPC_BOOK3S_32	2018-11-26 22:33:37 +11:00
ppc32.h	…
ppc_save_regs.S	…
proc_powerpc.c	…
process.c	powerpc: Fix 32-bit KVM-PR lockup and host crash with MacOS guest	2019-02-22 00:10:15 +11:00
prom.c	powerpc/prom: move the device tree if not in declared memory.	2018-12-20 22:21:20 +11:00
prom_init.c	…
prom_init_check.sh	…
prom_parse.c	…
ptrace.c	powerpc/ptrace: Simplify vr_get/set() to avoid GCC warning	2019-02-22 00:10:14 +11:00
ptrace32.c	…
reloc_32.S	…
reloc_64.S	…
rtas-proc.c	…
rtas-rtc.c	…
rtas.c	…
rtas_flash.c	Remove 'type' argument from access_ok() function	2019-01-03 18:57:57 -08:00
rtas_pci.c	…
rtasd.c	Remove 'type' argument from access_ok() function	2019-01-03 18:57:57 -08:00
security.c	powerpc/fsl: Update Spectre v2 reporting	2018-12-20 22:59:03 +11:00
setup-common.c	powerpc/setup: display reason for not booting	2019-02-22 00:10:15 +11:00
setup.h	…
setup_32.c	powerpc/dma: remove the unused ISA_DMA_THRESHOLD export	2018-12-20 22:21:20 +11:00
setup_64.c	powerpc/64: Fix kernel stack 16-byte alignment	2018-11-15 14:48:43 +11:00
signal.c	Remove 'type' argument from access_ok() function	2019-01-03 18:57:57 -08:00
signal.h	…
signal_32.c	Remove 'type' argument from access_ok() function	2019-01-03 18:57:57 -08:00
signal_64.c	powerpc/tm: Limit TM code inside PPC_TRANSACTIONAL_MEM	2019-01-11 23:45:00 +11:00
smp-tbsync.c	…
smp.c	powerpc/smp: Make __smp_send_nmi_ipi() static	2019-02-22 00:10:15 +11:00
stacktrace.c	powerpc/livepatch: return -ERRNO values in save_stack_trace_tsk_reliable()	2019-01-31 16:43:38 +11:00
suspend.c	…
swsusp.c	…
swsusp_32.S	…
swsusp_64.c	…
swsusp_asm64.S	…
swsusp_booke.S	…
sys_ppc32.c	…
syscalls.c	powerpc/64: Make sys_switch_endian() traceable	2019-02-22 00:10:15 +11:00
sysfs.c	powerpc: change CONFIG_6xx to CONFIG_PPC_BOOK3S_32	2018-11-26 22:33:37 +11:00
systbl.S	powerpc: generate uapi header and system call table files	2018-12-21 14:46:50 +11:00
systbl_chk.sh	…
tau_6xx.c	…
time.c	powerpc/kernel/time: Remove duplicate header	2019-01-30 23:42:31 +11:00
tm.S	…
traps.c	powerpc/traps: fix recoverability of machine check handling on book3s/32	2019-02-22 00:10:16 +11:00
udbg.c	powerpc: use a CONSOLE_LOGLEVEL_DEBUG macro	2019-01-14 20:39:27 +11:00
udbg_16550.c	…
uprobes.c	…
vdso.c	powerpc: split compat syscall table out from native table	2018-12-21 14:46:50 +11:00
vecemu.c	…
vector.S	…
vmlinux.lds.S	powerpc/kconfig: define CONFIG_DATA_SHIFT and CONFIG_ETEXT_SHIFT	2019-02-23 21:04:32 +11:00
watchdog.c	…