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63648dd20f
linux/arch/arm64/kernel
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Will Deacon 63648dd20f arm64: entry: use ldp/stp instead of push/pop when saving/restoring regs 
The push/pop instructions can be suboptimal when saving/restoring large
amounts of data to/from the stack, for example on entry/exit from the
kernel. This is because:

  (1) They act on descending addresses (i.e. the newly decremented sp),
      which may defeat some hardware prefetchers

  (2) They introduce an implicit dependency between each instruction, as
      the sp has to be updated in order to resolve the address of the
      next access.

This patch removes the push/pop instructions from our kernel entry/exit
macros in favour of ldp/stp plus offset.

Signed-off-by: Will Deacon <will.deacon@arm.com>
2014-11-14 10:42:21 +00:00
..
vdso arm64: vdso: fix build error when switching from LE to BE 2014-07-30 15:06:35 +01:00
.gitignore arm64: Build infrastructure 2012-09-17 13:42:21 +01:00
arm64ksyms.c arm64: Add ftrace support 2014-05-29 09:08:08 +01:00
asm-offsets.c arm64: KVM: implement lazy world switch for debug registers 2014-07-11 04:57:46 -07:00
cpu_ops.c arm64: kernel: enable PSCI cpu operations on UP systems 2014-07-18 15:23:25 +01:00
cpuidle.c arm64: kernel: introduce cpu_init_idle CPU operation 2014-09-12 10:48:55 +01:00
cpuinfo.c arm64: don't flag non-aliasing VIPT I-caches as aliasing 2014-09-08 14:39:18 +01:00
cputable.c arm64: add CPU_HOTPLUG infrastructure 2013-10-25 11:33:21 +01:00
debug-monitors.c KVM/ARM New features for 3.17 include: 2014-08-05 09:47:45 +02:00
efi-entry.S arm64/efi: efistub: jump to 'stext' directly, not through the header 2014-11-05 09:02:59 +01:00
efi-stub.c arm64/efi: efistub: don't abort if base of DRAM is occupied 2014-09-08 14:39:18 +01:00
efi.c arm64: dmi: set DMI string as dump stack arch description 2014-11-05 09:03:32 +01:00
entry-fpsimd.S arm64: fpsimd: fix a typo in fpsimd_save_partial_state ENDPROC 2014-07-31 11:42:42 +01:00
entry-ftrace.S arm64: ftrace: eliminate literal pool entries 2014-11-07 15:04:49 +00:00
entry.S arm64: entry: use ldp/stp instead of push/pop when saving/restoring regs 2014-11-14 10:42:21 +00:00
fpsimd.c arm64: fix bug for reloading FPSIMD state after cpu power off 2014-09-01 12:55:21 +01:00
ftrace.c arm64: Correct ftrace calls to aarch64_insn_gen_branch_imm() 2014-09-19 12:05:45 +01:00
head.S arm64/efi: set PE/COFF file alignment to 512 bytes 2014-11-05 09:03:09 +01:00
hw_breakpoint.c arm64: is_compat_task is defined both in asm/compat.h and linux/compat.h 2014-05-12 16:43:29 +01:00
hyp-stub.S irqchip: gic-v3: Initial support for GICv3 2014-07-08 22:11:47 +00:00
image.h arm64: Update the Image header 2014-07-10 12:36:40 +01:00
insn.c arm64: insn: Add return statements after BUG_ON() 2014-09-25 15:32:48 +01:00
io.c arm64: optimize memcpy_{from,to}io() and memset_io() 2014-11-06 17:25:27 +00:00
irq.c Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-10-09 06:42:04 -04:00
jump_label.c arm64, jump label: optimize jump label implementation 2014-01-08 15:23:53 +00:00
kgdb.c arm64: Fix typos in KGDB macros 2014-09-25 15:35:41 +01:00
kuser32.S arm64: Add __NR_* definitions for compat syscalls 2014-07-10 11:02:40 +01:00
Makefile PCI changes for the v3.18 merge window: 2014-10-09 15:03:49 -04:00
module.c arm64: move encode_insn_immediate() from module.c to insn.c 2014-01-08 15:21:29 +00:00
pci.c arm64: Add architectural support for PCI 2014-09-30 17:08:57 -06:00
perf_event.c ARM64: make of_device_ids const 2014-10-03 14:49:28 +01:00
perf_regs.c arm64: perf: don't rely on layout of pt_regs when grabbing sp or pc 2014-08-28 20:01:50 +01:00
process.c arm64: ASLR: Don't randomise text when randomise_va_space == 0 2014-10-24 15:47:49 +01:00
psci.c arm64: add PSCI CPU_SUSPEND based cpu_suspend support 2014-09-12 10:48:56 +01:00
ptrace.c Merge git://git.infradead.org/users/eparis/audit 2014-10-19 16:25:56 -07:00
return_address.c arm64: LLVMLinux: Use global stack pointer in return_address() 2014-09-08 14:39:19 +01:00
setup.c arm64: Fix up /proc/cpuinfo 2014-11-14 10:42:09 +00:00
signal32.c Merge branch 'signal-cleanup' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/misc 2014-08-09 09:58:12 -07:00
signal.c arm64: Use sigsp() 2014-08-06 13:03:45 +02:00
sleep.S arm64: kernel: refactor the CPU suspend API for retention states 2014-09-12 10:48:55 +01:00
smp_spin_table.c arm64: spin-table: handle unmapped cpu-release-addrs 2014-09-08 14:39:18 +01:00
smp.c arm64: Tell irq work about self IPI support 2014-09-13 18:46:13 +02:00
stacktrace.c arm64: LLVMLinux: Use current_stack_pointer in save_stack_trace_tsk 2014-09-08 14:39:19 +01:00
suspend.c arm64: kernel: refactor the CPU suspend API for retention states 2014-09-12 10:48:55 +01:00
sys32.S arm64: compat: correct register concatenation for syscall wrappers 2013-10-25 15:59:36 +01:00
sys_compat.c arm64: flush TLS registers during exec 2014-09-11 18:34:58 +01:00
sys.c arm64: switch to generic sigaltstack 2013-02-14 09:17:29 -05:00
time.c arm64: kernel: initialize broadcast hrtimer based clock event device 2014-05-30 17:48:13 +01:00
topology.c arm64: topology: add MPIDR-based detection 2014-07-09 12:22:40 +01:00
traps.c arm64: LLVMLinux: Use current_stack_pointer in kernel/traps.c 2014-09-08 14:39:19 +01:00
vdso.c arm64,ia64,ppc,s390,sh,tile,um,x86,mm: remove default gate area 2014-08-08 15:57:27 -07:00
vmlinux.lds.S arm64/efi: set PE/COFF file alignment to 512 bytes 2014-11-05 09:03:09 +01:00