Jisheng Zhang c360cbec35 riscv: introduce unified static key mechanism for ISA extensions ... Currently, riscv has several extensions which may not be supported on all riscv platforms, for example, FPU and so on. To support unified kernel Image style, we need to check whether the feature is supported or not. If the check sits at hot code path, then performance will be impacted a lot. static key can be used to solve the issue. In the past, FPU support has been converted to use static key mechanism. I believe we will have similar cases in the future. This patch tries to add an unified mechanism to use static keys for some ISA extensions by implementing an array of default-false static keys and enabling them when detected. Signed-off-by: Jisheng Zhang <jszhang@kernel.org> Reviewed-by: Atish Patra <atishp@rivosinc.com> Reviewed-by: Anup Patel <anup@brainfault.org> Link: https://lore.kernel.org/r/20220522153543.2656-2-jszhang@kernel.org Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>		2022-06-16 10:51:24 -07:00
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compat_vdso	riscv: compat: vdso: Add COMPAT_VDSO base code implementation	2022-04-26 13:36:53 -07:00
probes	ftrace: disable preemption when recursion locked	2021-10-27 11:21:49 -04:00
vdso	riscv: compat: vdso: Add COMPAT_VDSO base code implementation	2022-04-26 13:36:53 -07:00
.gitignore	.gitignore: add SPDX License Identifier	2020-03-25 11:50:48 +01:00
alternative.c	riscv: add memory-type errata for T-Head	2022-05-11 21:36:33 -07:00
asm-offsets.c	RISC-V: Add arch functions for non-retentive suspend entry/exit	2022-03-10 09:29:31 -08:00
cacheinfo.c	drivers: base: cacheinfo: Get rid of DEFINE_SMP_CALL_CACHE_FUNCTION()	2021-09-01 10:29:10 +02:00
compat_signal.c	riscv: compat: signal: Add rt_frame implementation	2022-05-17 16:37:21 -07:00
compat_syscall_table.c	riscv: compat: syscall: Add compat_sys_call_table implementation	2022-04-26 13:36:25 -07:00
cpu_ops_sbi.c	RISC-V: Declare per cpu boot data as static	2022-03-31 12:44:32 -07:00
cpu_ops_spinwait.c	RISC-V: Use __cpu_up_stack/task_pointer only for spinwait method	2022-01-20 09:27:08 -08:00
cpu_ops.c	RISC-V: Move spinwait booting method to its own config	2022-01-20 09:27:16 -08:00
cpu-hotplug.c	riscv: cpu-hotplug: clear cpu from numa map when teardown	2022-02-10 09:16:50 -08:00
cpu.c	riscv: Don't output a bogus mmu-type on a no MMU kernel	2022-05-21 12:20:04 -07:00
cpufeature.c	riscv: introduce unified static key mechanism for ISA extensions	2022-06-16 10:51:24 -07:00
crash_dump.c	vmcore: convert copy_oldmem_page() to take an iov_iter	2022-04-29 14:37:59 -07:00
crash_save_regs.S	RISC-V: Add kdump support	2021-04-26 08:25:23 -07:00
efi-header.S	RISC-V: Add PE/COFF header for EFI stub	2020-10-02 14:31:16 -07:00
efi.c	riscv: read-only pages should not be writable	2022-05-28 11:39:31 +02:00
elf_kexec.c	RISC-V: Load purgatory in kexec_file	2022-05-19 12:19:03 -07:00
entry.S	riscv: compat: syscall: Add entry.S implementation	2022-04-26 13:36:31 -07:00
fpu.S	riscv: abstract out CSR names for supervisor vs machine mode	2019-11-05 09:20:42 -08:00
ftrace.c	ftrace: Remove return value of ftrace_arch_modify_*()	2022-05-26 21:13:00 -04:00
head.h	RISC-V: Move spinwait booting method to its own config	2022-01-20 09:27:16 -08:00
head.S	riscv: Initialize thread pointer before calling C functions	2022-06-01 21:46:23 -07:00
image-vars.h	arch/riscv:fix typo in a comment in arch/riscv/kernel/image-vars.h	2021-02-18 23:18:00 -08:00
irq.c	RISC-V: Remove do_IRQ() function	2020-06-09 19:11:24 -07:00
jump_label.c	riscv: Add jump-label implementation	2020-07-30 11:37:43 -07:00
kexec_relocate.S	riscv: Don't use va_pa_offset on kdump	2022-01-09 10:38:06 -08:00
kgdb.c	riscv: Fix "no previous prototype" compile warning in kgdb.c file	2020-07-09 20:09:30 -07:00
machine_kexec_file.c	RISC-V: Add kexec_file support	2022-05-19 12:14:18 -07:00
machine_kexec.c	RISC-V: use memcpy for kexec_file mode	2022-05-19 11:53:41 -07:00
Makefile	riscv: kexec: add kexec_file_load() support	2022-05-19 16:26:50 -07:00
mcount-dyn.S	riscv: Using PATCHABLE_FUNCTION_ENTRY instead of MCOUNT	2021-01-14 15:09:05 -08:00
mcount.S	riscv: Workaround mcount name prior to clang-13	2021-04-26 08:25:01 -07:00
module-sections.c	riscv: add missing header file includes	2019-10-28 00:46:01 -07:00
module.c	riscv: implement module alternatives	2022-05-11 21:36:31 -07:00
patch.c	riscv: patch_text: Fixup last cpu should be master	2022-04-22 08:29:24 -07:00
perf_callchain.c	riscv: Fix fill_callchain return value	2022-03-30 23:01:42 -07:00
perf_regs.c	perf/arch: Remove perf_sample_data::regs_user_copy	2020-11-09 18:12:34 +01:00
process.c	This set of changes updates init and user mode helper tasks to be	2022-06-03 16:03:05 -07:00
ptrace.c	riscv: compat: ptrace: Add compat_arch_ptrace implement	2022-05-17 16:37:22 -07:00
reset.c	riscv: Use do_kernel_power_off()	2022-05-19 19:30:30 +02:00
riscv_ksyms.c	riscv: provide memmove implementation	2020-12-10 17:27:54 -08:00
sbi.c	RISC-V: Fix IPI/RFENCE hmask on non-monotonic hartid ordering	2022-02-14 12:27:45 -08:00
setup.c	RISC-V: Mark IORESOURCE_EXCLUSIVE for reserved mem instead of IORESOURCE_BUSY	2022-06-01 22:03:50 -07:00
signal.c	riscv: compat: signal: Add rt_frame implementation	2022-05-17 16:37:21 -07:00
smp.c	RISC-V: Use common riscv_cpuid_to_hartid_mask() for both SMP=y and SMP=n	2022-01-09 12:13:31 -08:00
smpboot.c	riscv: move boot alternatives to after fill_hwcap	2022-05-11 21:36:32 -07:00
soc.c	riscv: Fix builtin DTB handling	2021-01-07 19:00:50 -08:00
stacktrace.c	riscv: Rename "sp_in_global" to "current_stack_pointer"	2022-03-30 15:15:27 -07:00
suspend_entry.S	RISC-V: Split out the XIP fixups into their own file	2022-05-25 14:43:33 -07:00
suspend.c	RISC-V: Add arch functions for non-retentive suspend entry/exit	2022-03-10 09:29:31 -08:00
sys_riscv.c	riscv: compat: syscall: Add compat_sys_call_table implementation	2022-04-26 13:36:25 -07:00
syscall_table.c	riscv/vdso: Refactor asm/vdso.h	2021-10-02 13:42:23 -07:00
time.c	RISC-V Patches for the 5.13 Merge Window, Part 1	2021-05-06 09:24:18 -07:00
trace_irq.c	riscv: fix oops caused by irqsoff latency tracer	2022-02-24 20:30:30 -08:00
trace_irq.h	riscv: fix oops caused by irqsoff latency tracer	2022-02-24 20:30:30 -08:00
traps_misaligned.c	riscv: Unaligned load/store handling for M_MODE	2020-04-03 10:45:33 -07:00
traps.c	riscv: integrate alternatives better into the main architecture	2022-05-11 21:36:31 -07:00
vdso.c	riscv: compat: Using seperated vdso_maps for compat_vdso_info	2022-05-25 17:24:06 -07:00
vmlinux-xip.lds.S	riscv: vmlinux.lds.S|vmlinux-xip.lds.S: remove .fixup section	2022-01-05 17:53:37 -08:00
vmlinux.lds.S	riscv: vmlinux.lds.S|vmlinux-xip.lds.S: remove .fixup section	2022-01-05 17:53:37 -08:00