Andy Chiu 956895b9d8 riscv: vector: make Vector always available for softirq context ... The goal of this patch is to provide full support of Vector in kernel softirq context. So that some of the crypto alogrithms won't need scalar fallbacks. By disabling bottom halves in active kernel-mode Vector, softirq will not be able to nest on top of any kernel-mode Vector. So, softirq context is able to use Vector whenever it runs. After this patch, Vector context cannot start with irqs disabled. Otherwise local_bh_enable() may run in a wrong context. Disabling bh is not enough for RT-kernel to prevent preeemption. So we must disable preemption, which also implies disabling bh on RT. Related-to: commit 696207d425 ("arm64/sve: Make kernel FPU protection RT friendly") Related-to: commit 66c3ec5a71 ("arm64: neon: Forbid when irqs are disabled") Signed-off-by: Andy Chiu <andy.chiu@sifive.com> Reviewed-by: Eric Biggers <ebiggers@google.com> Tested-by: Björn Töpel <bjorn@rivosinc.com> Tested-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com> Link: https://lore.kernel.org/r/20240115055929.4736-3-andy.chiu@sifive.com Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>		2024-01-16 07:13:54 -08:00
..
compat_vdso	kbuild: unify vdso_install rules	2023-10-28 21:09:02 +09:00
pi	riscv: Introduce virtual kernel mapping KASLR	2023-09-05 19:49:27 -07:00
probes	riscv: Use SYM_*() assembly macros instead of deprecated ones	2023-11-06 09:42:47 -08:00
tests	riscv: Add tests for riscv module loading	2023-11-07 14:59:32 -08:00
vdso	RISC-V Patches for the 6.7 Merge Window, Part 2	2023-11-10 09:23:17 -08:00
.gitignore
acpi.c	RISC-V: ACPI: Enhance acpi_os_ioremap with MMIO remapping	2023-10-26 09:40:31 -07:00
alternative.c	Merge patch series "Add non-coherent DMA support for AX45MP"	2023-09-08 11:24:34 -07:00
asm-offsets.c	riscv: Implement Shadow Call Stack	2023-10-27 14:43:08 -07:00
cacheinfo.c	RISC-V Patches for the 6.4 Merge Window, Part 1	2023-04-28 16:55:39 -07:00
cfi.c	riscv: Add CFI error handling	2023-08-23 14:16:39 -07:00
compat_signal.c	riscv: compat: signal: Add rt_frame implementation	2022-05-17 16:37:21 -07:00
compat_syscall_table.c	riscv: Implement syscall wrappers	2023-08-23 14:16:36 -07:00
copy-unaligned.h	RISC-V: Probe for unaligned access speed	2023-09-01 09:06:25 -07:00
copy-unaligned.S	riscv: Use SYM_*() assembly macros instead of deprecated ones	2023-11-06 09:42:47 -08:00
cpu-hotplug.c	riscv: Switch to hotplug core state synchronization	2023-05-15 13:44:59 +02:00
cpu.c	Merge patch series "Linux RISC-V AIA Preparatory Series"	2023-11-08 18:57:17 -08:00
cpu_ops.c	RISC-V: Align SBI probe implementation with spec	2023-04-29 13:04:50 -07:00
cpu_ops_sbi.c	riscv: cpu_ops_sbi: Add 64bit hartid support on RV64	2022-07-19 16:38:58 -07:00
cpu_ops_spinwait.c	RISC-V: cpu_ops_spinwait.c should include head.h	2022-08-11 13:24:16 -07:00
cpufeature.c	RISC-V Patches for the 6.7 Merge Window, Part 2	2023-11-10 09:23:17 -08:00
crash_core.c	riscv: Export va_kernel_pa_offset in vmcoreinfo	2023-08-02 13:50:31 -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: Fixup get incorrect user mode PC for kernel mode regs	2022-08-11 08:54:40 -07:00
efi-header.S	riscv: Prepare EFI header for relocatable kernels	2023-04-19 07:46:28 -07:00
efi.c	efi: Discover BTI support in runtime services regions	2023-02-04 09:19:02 +01:00
elf_kexec.c	Merge patch series "riscv: kexec: cleanup and fixups"	2023-10-31 19:15:41 -07:00
entry.S	riscv: kernel: Use correct SYM_DATA_*() macro for data	2023-11-06 09:42:48 -08:00
fpu.S	riscv: Use SYM_*() assembly macros instead of deprecated ones	2023-11-06 09:42:47 -08:00
ftrace.c	RISC-V: Don't check text_mutex during stop_machine	2023-03-09 14:58:51 -08:00
head.h	riscv: entry: Convert to generic entry	2023-03-23 08:47:00 -07:00
head.S	riscv: Use SYM_*() assembly macros instead of deprecated ones	2023-11-06 09:42:47 -08:00
hibernate-asm.S	riscv: Use SYM_*() assembly macros instead of deprecated ones	2023-11-06 09:42:47 -08:00
hibernate.c	riscv: hibernate: remove WARN_ON in save_processor_state	2023-06-23 10:06:22 -07:00
image-vars.h	efi: move screen_info into efi init code	2023-10-17 16:33:39 +02:00
irq.c	Merge patch "drivers: perf: Do not broadcast to other cpus when starting a counter"	2023-11-09 06:44:13 -08:00
jump_label.c	jump_label: make initial NOP patching the special case	2022-06-24 09:48:55 +02:00
kernel_mode_vector.c	riscv: vector: make Vector always available for softirq context	2024-01-16 07:13:54 -08:00
kexec_relocate.S	riscv: kexec: Cleanup riscv_kexec_relocate	2023-09-20 02:53:29 -07:00
kgdb.c	RISC-V: rename parse_asm.h to insn.h	2022-12-29 06:59:47 -08:00
machine_kexec.c	riscv: kexec: Fixup crash_smp_send_stop without multi cores	2022-11-29 21:50:59 -08:00
machine_kexec_file.c	RISC-V: Add kexec_file support	2022-05-19 12:14:18 -07:00
Makefile	riscv: Add support for kernel mode vector	2024-01-16 07:13:53 -08:00
mcount-dyn.S	riscv: Use SYM_*() assembly macros instead of deprecated ones	2023-11-06 09:42:47 -08:00
mcount.S	riscv: Use SYM_*() assembly macros instead of deprecated ones	2023-11-06 09:42:47 -08:00
module-sections.c
module.c	RISC-V: Don't rely on positional structure initialization	2023-11-07 15:00:05 -08:00
patch.c	riscv: implement a memset like function for text	2023-09-06 06:26:06 -07:00
perf_callchain.c	riscv: Fix fill_callchain return value	2022-03-30 23:01:42 -07:00
perf_regs.c
process.c	riscv: Add support for kernel mode vector	2024-01-16 07:13:53 -08:00
ptrace.c	RISC-V: Add ptrace support for vectors	2023-09-01 13:05:38 -07:00
reset.c	riscv: Use do_kernel_power_off()	2022-05-19 19:30:30 +02:00
riscv_ksyms.c	RISC-V: add infrastructure to allow different str* implementations	2023-01-31 11:43:23 -08:00
sbi-ipi.c	RISC-V: Allow marking IPIs as suitable for remote FENCEs	2023-04-08 11:26:24 +01:00
sbi.c	riscv: Make __flush_tlb_range() loop over pte instead of flushing the whole tlb	2023-11-06 07:20:51 -08:00
setup.c	Merge patch "drivers: perf: Do not broadcast to other cpus when starting a counter"	2023-11-09 06:44:13 -08:00
signal.c	Merge patch "drivers: perf: Do not broadcast to other cpus when starting a counter"	2023-11-09 06:44:13 -08:00
smp.c	riscv: Fix CPU feature detection with SMP disabled	2023-08-08 15:28:25 -07:00
smpboot.c	RISC-V: Probe misaligned access speed in parallel	2023-11-07 15:13:47 -08:00
soc.c
stacktrace.c	riscv: Use READ_ONCE_NOCHECK in imprecise unwinding stack mode	2023-03-09 14:50:35 -08:00
suspend.c	RISC-V: Change suspend_save_csrs and suspend_restore_csrs to public function	2023-04-29 11:25:10 -07:00
suspend_entry.S	riscv: Use SYM_*() assembly macros instead of deprecated ones	2023-11-06 09:42:47 -08:00
sys_riscv.c	RISC-V Patches for the 6.7 Merge Window, Part 1	2023-11-08 09:21:18 -08:00
syscall_table.c	riscv: Implement syscall wrappers	2023-08-23 14:16:36 -07:00
time.c	RISC-V: time.c: Add ACPI support for time_init()	2023-06-01 08:45:13 -07:00
traps.c	Merge patch "drivers: perf: Do not broadcast to other cpus when starting a counter"	2023-11-09 06:44:13 -08:00
traps_misaligned.c	RISC-V: Remove __init on unaligned_emulation_finish()	2023-11-07 15:13:19 -08:00
vdso.c	riscv: vdso: include vdso/vsyscall.h for vdso_data	2023-07-04 07:54:41 -07:00
vector.c	riscv: Remove now superfluous sentinel element from ctl_table array	2023-10-10 15:22:02 -07:00
vmlinux-xip.lds.S	riscv: vmlinux-xip.lds.S: remove .alternative section	2023-06-25 16:24:03 -07:00
vmlinux.lds.S	riscv: enable HAVE_LD_DEAD_CODE_DATA_ELIMINATION	2023-06-25 16:24:05 -07:00