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508074607c
linux/arch/arm/kernel
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Ard Biesheuvel 508074607c ARM: 9195/1: entry: avoid explicit literal loads 
ARMv7 has MOVW/MOVT instruction pairs to load symbol addresses into
registers without having to rely on literal loads that go via the
D-cache.  For older cores, we now support a similar arrangement, based
on PC-relative group relocations.

This means we can elide most literal loads entirely from the entry path,
by switching to the ldr_va macro to emit the appropriate sequence
depending on the target architecture revision.

While at it, switch to the bl_r macro for invoking the right PABT/DABT
helpers instead of setting the LR register explicitly, which does not
play well with cores that speculate across function returns.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
2022-05-20 12:32:32 +01:00
..
.gitignore .gitignore: add SPDX License Identifier 2020-03-25 11:50:48 +01:00
arch_timer.c ARM: 8913/1: arch_timer: include <asm/arch_timer.h> 2019-10-27 21:14:43 +00:00
armksyms.c crypto: lib/sha1 - remove unnecessary includes of linux/cryptohash.h 2020-05-08 15:32:17 +10:00
asm-offsets.c ARM: implement THREAD_INFO_IN_TASK for uniprocessor systems 2021-12-06 12:49:17 +01:00
atags_compat.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
atags_parse.c ARM: 9011/1: centralize phys-to-virt conversion of DT/ATAGS address 2020-10-27 12:10:59 +00:00
atags_proc.c proc: remove PDE_DATA() completely 2022-01-22 08:33:37 +02:00
atags.h ARM: 9011/1: centralize phys-to-virt conversion of DT/ATAGS address 2020-10-27 12:10:59 +00:00
bios32.c ARM/PCI: Remove unused fields from struct hw_pci 2020-09-18 22:39:09 +01:00
bugs.c treewide: fix typos of SPDX-License-Identifier 2019-06-01 18:29:58 +02:00
cpuidle.c treewide: Convert macro and uses of __section(foo) to __section("foo") 2020-10-25 14:51:49 -07:00
crash_dump.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
debug.S ARM: 9005/1: debug: Select flow control for all debug UARTs 2020-09-15 14:35:28 +01:00
devtree.c ARM: Use of_get_cpu_hwid() 2021-10-20 13:36:30 -05:00
dma-isa.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
dma.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
early_printk.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
efi.c mm/pgtable: drop pgtable_t variable from pte_fn_t functions 2019-07-12 11:05:46 -07:00
elf.c arm32/64/elf: Split READ_IMPLIES_EXEC from executable PT_GNU_STACK 2020-04-20 19:42:19 +02:00
entry-armv.S ARM: 9195/1: entry: avoid explicit literal loads 2022-05-20 12:32:32 +01:00
entry-common.S ARM: 9195/1: entry: avoid explicit literal loads 2022-05-20 12:32:32 +01:00
entry-ftrace.S ARM: ftrace: enable the graph tracer with the EABI unwinder 2022-02-09 09:13:59 +01:00
entry-header.S ARM: 9195/1: entry: avoid explicit literal loads 2022-05-20 12:32:32 +01:00
entry-v7m.S ARM: v7m: enable support for IRQ stacks 2021-12-06 12:49:17 +01:00
fiq.c arm: fix the flush_icache_range arguments in set_fiq_handler 2020-06-08 11:05:57 -07:00
fiqasm.S
ftrace.c ARM: ftrace: enable the graph tracer with the EABI unwinder 2022-02-09 09:13:59 +01:00
head-common.S ARM: implement THREAD_INFO_IN_TASK for uniprocessor systems 2021-12-06 12:49:17 +01:00
head-inflate-data.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
head-nommu.S ARM: 9160/1: NOMMU: Reload __secondary_data after PROCINFO_INITFUNC 2021-12-17 12:02:16 +00:00
head.S ARM: mm: switch to swapper_pg_dir early for vmap'ed stack 2022-01-24 20:37:55 +01:00
hibernate.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 194 2019-05-30 11:29:22 -07:00
hw_breakpoint.c ARM: 9064/1: hw_breakpoint: Do not directly check the event's overflow_handler hook 2021-03-25 10:27:41 +00:00
hyp-stub.S Merge branch 'devel-stable' into for-next 2020-12-21 11:19:26 +00:00
insn.c ARM: 9078/1: Add warn suppress parameter to arm_gen_branch_link() 2021-06-07 12:56:20 +01:00
io.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
irq.c ARM: remove old-style irq entry 2021-12-06 12:49:11 +01:00
isa.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
iwmmxt.h ARM: 9029/1: Make iwmmxt.S support Clang's integrated assembler 2020-12-08 10:14:59 +00:00
iwmmxt.S ARM: 9029/1: Make iwmmxt.S support Clang's integrated assembler 2020-12-08 10:14:59 +00:00
jump_label.c jump_label: move 'asm goto' support test to Kconfig 2019-01-06 09:46:51 +09:00
kgdb.c ARM: Fix kgdb breakpoint for Thumb2 2022-02-21 14:56:53 +00:00
machine_kexec.c ARM: 9060/1: kexec: Remove unused kexec_reinit callback 2021-03-09 10:25:35 +00:00
Makefile ARM development updates for 5.18: 2022-03-23 17:35:57 -07:00
module-plts.c ARM: 9098/1: ftrace: MODULE_PLT: Fix build problem without DYNAMIC_FTRACE 2021-07-05 11:52:26 +01:00
module.c ARM: assembler: define a Kconfig symbol for group relocation support 2022-01-24 21:02:34 +01:00
opcodes.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
paravirt.c x86/paravirt: Switch time pvops functions to use static_call() 2021-03-11 16:17:52 +01:00
patch.c arm/patch: Fix !MMU compile 2020-02-11 12:56:27 +01:00
perf_callchain.c perf: Drop dead and useless guest "support" from arm, csky, nds32 and riscv 2021-11-17 14:49:07 +01:00
perf_event_v6.c arm_pmu: Tidy up clear_event_idx call backs 2018-07-10 18:19:02 +01:00
perf_event_v7.c arm_pmu: Fix write counter incorrect in ARMv7 big-endian mode 2021-06-01 14:17:01 +01:00
perf_event_xscale.c arm_pmu: Tidy up clear_event_idx call backs 2018-07-10 18:19:02 +01:00
perf_regs.c perf/arch: Remove perf_sample_data::regs_user_copy 2020-11-09 18:12:34 +01:00
phys2virt.S ARM: p2v: reduce p2v alignment requirement to 2 MiB 2020-10-28 16:59:43 +01:00
pj4-cp0.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
process.c ARM: implement THREAD_INFO_IN_TASK for uniprocessor systems 2021-12-06 12:49:17 +01:00
psci_smp.c ARM: 8919/1: make unexported functions static 2019-10-31 16:58:52 +00:00
ptrace.c ptrace: Create ptrace_report_syscall_{entry,exit} in ptrace.h 2022-03-10 13:35:08 -06:00
reboot.c ARM: 9096/1: Remove arm_pm_restart() 2021-06-13 18:16:48 +01:00
reboot.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
relocate_kernel.S ARM: kexec: fix oops after TLB are invalidated 2021-02-05 10:23:29 +00:00
return_address.c ARM: unwind: set frame.pc correctly for current-thread unwinding 2022-03-11 10:55:28 +00:00
setup.c ARM fixes for 5.18-rc1: 2022-04-03 10:17:48 -07:00
signal.c resume_user_mode: Move to resume_user_mode.h 2022-03-10 16:51:50 -06:00
signal.h ARM: 8920/1: share get_signal_page from signal.c to process.c 2019-10-31 16:58:53 +00:00
sigreturn_codes.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174 2019-05-30 11:26:41 -07:00
sleep.S ARM: mm: switch to swapper_pg_dir early for vmap'ed stack 2022-01-24 20:37:55 +01:00
smccc-call.S ARM: 9075/1: kernel: Fix interrupted SMC calls 2021-04-18 19:15:14 +01:00
smp_scu.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
smp_tlb.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
smp_twd.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
smp.c ARM development updates for 5.18: 2022-03-23 17:35:57 -07:00
spectre.c ARM: fix build error when BPF_SYSCALL is disabled 2022-03-08 12:53:05 -08:00
stacktrace.c ARM fixes for 5.18-rc1: 2022-04-03 10:17:48 -07:00
suspend.c ARM: 9066/1: ftrace: pause/unpause function graph tracer in cpu_suspend() 2021-03-25 10:27:42 +00:00
swp_emulate.c uaccess: fix type mismatch warnings from access_ok() 2022-02-25 09:36:05 +01:00
sys_arm.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
sys_oabi-compat.c ARM: 9110/1: oabi-compat: fix oabi epoll sparse warning 2021-08-20 11:39:27 +01:00
tcm.c ARM: 8925/1: tcm: include <asm/tcm.h> for missing declarations 2019-10-31 16:58:56 +00:00
thumbee.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 333 2019-06-05 17:37:06 +02:00
time.c ARM: rpc: use legacy_timer_tick 2020-10-30 21:57:05 +01:00
topology.c ARM, sched/topology: Revert back to default scheduler topology 2020-08-19 10:49:47 +02:00
traps.c asm-generic updates for 5.18 2022-03-23 18:03:08 -07:00
unwind.c ARM: unwind: only permit stack switch when unwinding call_with_stack() 2022-03-11 13:01:00 +00:00
v7m.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
vdso.c mm: forbid splitting special mappings 2020-12-15 12:13:41 -08:00
vmlinux-xip.lds.S Merge branches 'devel-stable' and 'misc' into for-linus 2021-11-02 09:04:22 +00:00
vmlinux.lds.S ARM: implement support for vmap'ed stacks 2021-12-03 15:11:33 +01:00
xscale-cp0.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00