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b86fb88855ea7881314b935df1df6b1ef1bd0c32
linux/arch/powerpc/kernel
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Christophe Leroy b86fb88855 powerpc/32: implement fast entry for syscalls on non BOOKE 
This patch implements a fast entry for syscalls.

Syscalls don't have to preserve non volatile registers except LR.

This patch then implement a fast entry for syscalls, where
volatile registers get clobbered.

As this entry is dedicated to syscall it always sets MSR_EE
and warns in case MSR_EE was previously off

It also assumes that the call is always from user, system calls are
unexpected from kernel.

The overall series improves null_syscall selftest by 12,5% on an 83xx
and by 17% on a 8xx.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2019-05-03 01:20:27 +10:00
..
syscalls
Merge tag 'powerpc-5.1-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
2019-03-07 12:56:26 -08:00
trace
powerpc/64: Replace CURRENT_THREAD_INFO with PACA_THREAD_INFO
2019-02-23 22:31:40 +11:00
vdso32
powerpc/vdso: Drop unnecessary cc-ldoption
2019-05-01 10:49:58 +10:00
vdso64
powerpc/vdso: Drop unnecessary cc-ldoption
2019-05-01 10:49:58 +10:00
.gitignore
…
align.c
Remove 'type' argument from access_ok() function
2019-01-03 18:57:57 -08:00
asm-offsets.c
Merge branch 'topic/ppc-kvm' into next
2019-04-30 22:52:03 +10:00
audit.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
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/cacheinfo: Fix kobject memleak
2019-05-01 10:52:29 +10:00
cacheinfo.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
compat_audit.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
cpu_setup_6xx.S
powerpc/6xx: fix setup and use of SPRN_SPRG_PGDIR for hash32
2019-03-19 00:30:19 +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
powerpc: Turn off CPU_FTR_P9_TM_HV_ASSIST in non-hypervisor mode
2018-10-09 16:04:27 +11:00
cpu_setup_ppc970.S
…
cputable.c
powerpc: don't use direct assignation during early boot.
2019-05-03 01:20:25 +10:00
crash_dump.c
powerpc: don't use ioremap_prot() nor __ioremap() unless really needed.
2018-10-14 18:04:09 +11:00
crash.c
powerpc: remove kdump.h from page.h
2018-07-30 22:47:53 +10:00
dbell.c
powerpc: Add doorbell tracepoints
2019-05-01 16:45:05 +10:00
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
treewide: add checks for the return value of memblock_alloc*()
2019-03-12 10:04:02 -07:00
early_32.c
powerpc/32: use memset() instead of memset_io() to zero BSS
2019-05-03 01:20:26 +10:00
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
powerpc/eeh: Cleanup list_head field names
2018-10-13 22:21:25 +11:00
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
eeh.c
powerpc/eeh: Add eeh_force_recover to debugfs
2019-02-22 00:10:15 +11:00
entry_32.S
powerpc/32: implement fast entry for syscalls on non BOOKE
2019-05-03 01:20:27 +10:00
entry_64.S
powerpc/64s: Implement KUAP for Radix MMU
2019-04-21 23:06:02 +10:00
epapr_hcalls.S
powerpc/32: Remove CURRENT_THREAD_INFO and rename TI_CPU
2019-02-23 22:31:40 +11:00
epapr_paravirt.c
…
exceptions-64e.S
powerpc/fsl: Fix the flush of branch predictor.
2019-02-27 22:52:38 +11:00
exceptions-64s.S
Merge branch 'topic/ppc-kvm' into next
2019-04-30 22:52:03 +10:00
fadump.c
powerpc/mm: move hugetlb_disabled into asm/hugetlb.h
2019-05-03 01:20:24 +10:00
firmware.c
…
fpu.S
powerpc: clean inclusions of asm/feature-fixups.h
2018-07-30 22:48:17 +10:00
fsl_booke_entry_mapping.S
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
head_8xx.S
powerpc/32: implement fast entry for syscalls on non BOOKE
2019-05-03 01:20:27 +10:00
head_32.h
powerpc/32: implement fast entry for syscalls on non BOOKE
2019-05-03 01:20:27 +10:00
head_32.S
powerpc/32: implement fast entry for syscalls on non BOOKE
2019-05-03 01:20:27 +10:00
head_40x.S
powerpc/32: implement fast entry for syscalls on non BOOKE
2019-05-03 01:20:27 +10:00
head_44x.S
powerpc/32: Enter exceptions with MSR_EE unset
2019-05-03 01:20:27 +10:00
head_64.S
powerpc/64: Fix booting large kernels with STRICT_KERNEL_RWX
2019-04-20 22:02:12 +10:00
head_booke.h
powerpc/32: get rid of COPY_EE in exception entry
2019-05-03 01:20:27 +10:00
head_fsl_booke.S
powerpc/32: Enter exceptions with MSR_EE unset
2019-05-03 01:20:27 +10:00
hw_breakpoint.c
powerpc: Add force enable of DAWR on P9 option
2019-04-20 22:20:45 +10:00
idle_6xx.S
powerpc/32: Remove CURRENT_THREAD_INFO and rename TI_CPU
2019-02-23 22:31:40 +11:00
idle_book3e.S
powerpc/64: Replace CURRENT_THREAD_INFO with PACA_THREAD_INFO
2019-02-23 22:31:40 +11:00
idle_book3s.S
powerpc/64s: Reimplement book3s idle code in C
2019-04-30 22:37:48 +10:00
idle_e500.S
powerpc/32: Remove CURRENT_THREAD_INFO and rename TI_CPU
2019-02-23 22:31:40 +11:00
idle_power4.S
powerpc/64: Replace CURRENT_THREAD_INFO with PACA_THREAD_INFO
2019-02-23 22:31:40 +11:00
idle.c
…
ima_kexec.c
powerpc: ima: send the kexec buffer to the next kernel
2016-12-20 09:48:44 -08:00
io-workarounds.c
powerpc: handover page flags with a pgprot_t parameter
2018-10-14 18:04:09 +11:00
io.c
…
iomap.c
powerpc: iomap.c: introduce io{read|write}64_{lo_hi|hi_lo}
2018-04-05 14:59:26 +10:00
iommu.c
Merge tag 'iommu-updates-v4.21' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu
2019-01-01 15:55:29 -08:00
irq.c
powerpc: clean stack pointers naming
2019-02-23 22:31:40 +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
kernel/kexec_file.c: allow archs to set purgatory load address
2018-04-13 17:10:28 -07:00
kgdb.c
powerpc: Activate CONFIG_THREAD_INFO_IN_TASK
2019-02-23 22:31:40 +11:00
kprobes-ftrace.c
bpf/error-inject/kprobes: Clear current_kprobe and enable preempt in kprobe
2018-06-21 12:33:19 +02:00
kprobes.c
bpf/error-inject/kprobes: Clear current_kprobe and enable preempt in kprobe
2018-06-21 12:33:19 +02:00
kvm_emul.S
powerpc: move ASM_CONST and stringify_in_c() into asm-const.h
2018-07-30 22:48:16 +10:00
kvm.c
powerpc/kvm: Prefer fault_in_pages_readable function
2018-05-17 14:12:40 +10:00
l2cr_6xx.S
powerpc: clean inclusions of asm/feature-fixups.h
2018-07-30 22:48:17 +10:00
legacy_serial.c
powerpc: Use of_node_name_eq for node name comparisons
2018-12-22 21:29:50 +11:00
machine_kexec_32.c
…
machine_kexec_64.c
powerpc: Activate CONFIG_THREAD_INFO_IN_TASK
2019-02-23 22:31:40 +11:00
machine_kexec_file_64.c
powerpc, kexec_file: factor out memblock-based arch_kexec_walk_mem()
2018-12-06 14:38:50 +00:00
machine_kexec.c
powerpc: remove kdump.h from page.h
2018-07-30 22:47:53 +10:00
Makefile
powerpc: disable KASAN instrumentation on early/critical files.
2019-05-03 01:20:26 +10:00
mce_power.c
powerpc/powernv/mce: Print additional information about MCE error.
2019-05-01 22:23:20 +10:00
mce.c
powerpc/powernv/mce: Print additional information about MCE error.
2019-05-01 22:23:20 +10:00
misc_32.S
powerpc/32: Remove CURRENT_THREAD_INFO and rename TI_CPU
2019-02-23 22:31:40 +11:00
misc_64.S
powerpc: clean inclusions of asm/feature-fixups.h
2018-07-30 22:48:17 +10:00
misc.S
powerpc/misc: merge reloc_offset() and add_reloc_offset()
2018-06-04 00:39:17 +10:00
module_32.c
powerpc/sparse: Fix plain integer as NULL pointer warning
2018-05-25 12:04:38 +10:00
module_64.c
powerpc/64/module: REL32 relocation range check
2018-10-20 13:26:47 +11:00
module.c
powerpc64/module elfv1: Set opd addresses after module relocation
2018-10-20 13:26:47 +11:00
module.lds
powerpc/modules: Fix alignment of .toc section in kernel modules
2017-12-11 13:03:35 +11:00
msi.c
powerpc/msi: Fix NULL pointer access in teardown code
2018-11-29 23:49:11 +11:00
nvram_64.c
powerpc: Adopt nvram module for PPC64
2019-01-22 10:21:45 +01:00
of_platform.c
powerpc: Convert to using %pOF instead of full_name
2017-08-23 22:27:04 +10:00
optprobes_head.S
powerpc/64: Rename soft_enabled to irq_soft_mask
2018-01-19 22:37:01 +11:00
optprobes.c
powerpc/kprobes: Do not disable interrupts for optprobes and kprobes_on_ftrace
2017-11-12 23:51:41 +11:00
paca.c
powerpc/mm: Add helpers for accessing hash translation related variables
2019-04-21 23:12:38 +10:00
pci_32.c
treewide: add checks for the return value of memblock_alloc*()
2019-03-12 10:04:02 -07:00
pci_64.c
powerpc: handover page flags with a pgprot_t parameter
2018-10-14 18:04:09 +11:00
pci_dn.c
powerpc/pci: Separate SR-IOV Calls
2017-12-11 13:03:35 +11:00
pci_of_scan.c
powerpc: Use device_type helpers to access the node type
2018-11-26 22:33:37 +11:00
pci-common.c
Merge tag 'powerpc-5.1-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
2019-03-07 12:56:26 -08:00
pci-hotplug.c
powerpc/pci: Unroll two pass loop when scanning bridges
2017-12-18 23:05:52 -06:00
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
powerpc: move ASM_CONST and stringify_in_c() into asm-const.h
2018-07-30 22:48:16 +10:00
proc_powerpc.c
powerpc: Use octal numbers for file permissions
2018-01-22 05:48:33 +11:00
process.c
powerpc/64s: Remove 'dummy_copy_buffer'
2019-05-01 12:08:44 +10:00
prom_init_check.sh
powerpc/prom_init: don't use string functions from lib/
2019-05-03 01:20:25 +10:00
prom_init.c
powerpc: don't use direct assignation during early boot.
2019-05-03 01:20:25 +10:00
prom_parse.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
prom.c
powerpc: use memblock functions returning virtual address
2019-03-12 10:04:01 -07:00
ptrace32.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
ptrace.c
powerpc: Add force enable of DAWR on P9 option
2019-04-20 22:20:45 +10:00
reloc_32.S
…
reloc_64.S
powerpc/asm: Convert .llong directives to .8byte
2017-08-31 14:26:47 +10:00
rtas_flash.c
Remove 'type' argument from access_ok() function
2019-01-03 18:57:57 -08:00
rtas_pci.c
powerpc/kernel: Change retrieval of pci_dn
2017-08-31 14:26:40 +10:00
rtas-proc.c
Merge tag 'powerpc-4.18-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
2018-06-07 10:23:33 -07:00
rtas-rtc.c
powerpc: use time64_t in read_persistent_clock
2018-06-03 20:43:33 +10:00
rtas.c
memblock: drop memblock_alloc_base()
2019-03-12 10:04:01 -07:00
rtasd.c
Remove 'type' argument from access_ok() function
2019-01-03 18:57:57 -08:00
security.c
powerpc/security: Fix spectre_v2 reporting
2019-03-21 21:09:03 +11:00
setup_32.c
powerpc/32: Move early_init() in a separate file
2019-05-03 01:20:25 +10:00
setup_64.c
powerpc/64: Setup KUP on secondary CPUs
2019-04-21 23:05:59 +10:00
setup-common.c
powerpc/mm: print hash info in a helper
2019-05-03 01:20:26 +10:00
setup.h
powerpc/tau: Synchronize function prototypes and body
2018-05-25 12:04:43 +10:00
signal_32.c
Remove 'type' argument from access_ok() function
2019-01-03 18:57:57 -08:00
signal_64.c
powerpc/tm: Avoid machine crash on rt_sigreturn()
2019-05-01 23:03:29 +10:00
signal.c
Remove 'type' argument from access_ok() function
2019-01-03 18:57:57 -08:00
signal.h
powerpc/syscalls: signal_{32, 64} - switch to SYSCALL_DEFINE
2018-05-10 23:25:13 +10:00
smp-tbsync.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
smp.c
powerpc: 'current_set' is now a table of task_struct pointers
2019-02-23 22:31:40 +11:00
stacktrace.c
powerpc: Remove export of save_stack_trace_tsk_reliable()
2019-03-02 14:43:05 +11:00
suspend.c
…
swsusp_32.S
powerpc: clean inclusions of asm/feature-fixups.h
2018-07-30 22:48:17 +10:00
swsusp_64.c
sched/headers: Prepare for new header dependencies before moving code to <linux/sched/nmi.h>
2017-03-02 08:42:30 +01:00
swsusp_asm64.S
powerpc/64s/hash: Simplify slb_flush_and_rebolt()
2018-10-14 18:04:09 +11:00
swsusp_booke.S
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
swsusp.c
powerpc/swsusp: Include suspend.h to silence sparse warnings
2017-03-20 19:02:49 +11:00
sys_ppc32.c
powerpc/syscalls: kill ppc32_select()
2018-05-10 23:25:15 +10:00
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_chk.sh
powerpc: Make it clearer that systbl check errors are errors
2018-05-10 23:25:16 +10:00
systbl.S
powerpc: remove nargs from __SYSCALL
2019-03-02 14:43:05 +11:00
tau_6xx.c
powerpc/tau: Make some function static
2018-05-25 12:04:44 +10:00
time.c
powerpc: Remove duplicate headers
2019-04-20 22:02:44 +10:00
tm.S
Merge branch 'fixes' into next
2018-10-09 16:51:05 +11:00
traps.c
powerpc/fsl_booke: ensure SPEFloatingPointException() reenables interrupts
2019-05-03 01:20:27 +10:00
udbg_16550.c
…
udbg.c
powerpc: use a CONSOLE_LOGLEVEL_DEBUG macro
2019-01-14 20:39:27 +11:00
uprobes.c
powerpc/uprobes: Implement arch_uretprobe_is_alive()
2017-08-24 16:19:21 +10:00
vdso.c
powerpc/vdso: don't clear PG_reserved
2019-03-05 21:07:18 -08:00
vecemu.c
powerpc: Add a missing include header
2018-05-25 12:04:46 +10:00
vector.S
powerpc: move ASM_CONST and stringify_in_c() into asm-const.h
2018-07-30 22:48:16 +10:00
vmlinux.lds.S
powerpc/kconfig: define CONFIG_DATA_SHIFT and CONFIG_ETEXT_SHIFT
2019-02-23 21:04:32 +11:00
watchdog.c
powerpc/watchdog: Use hrtimers for per-CPU heartbeat
2019-04-30 11:31:02 +10:00