Conor Dooley d82f32202e RISC-V: Ignore V from the riscv,isa DT property on older T-Head CPUs ... Before attempting to support the pre-ratification version of vector found on older T-Head CPUs, disallow "v" in riscv,isa on these platforms. The deprecated property has no clear way to communicate the specific version of vector that is supported and much of the vendor provided software puts "v" in the isa string. riscv,isa-extensions should be used instead. This should not be too much of a burden for these systems, as the vendor shipped devicetrees and firmware do not work with a mainline kernel and will require updating. We can limit this restriction to only ignore v in riscv,isa on CPUs that report T-Head's vendor ID and a zero marchid. Newer T-Head CPUs that support the ratified version of vector should report non-zero marchid, according to Guo Ren [1]. Link: https://lore.kernel.org/linux-riscv/CAJF2gTRy5eK73=d6s7CVy9m9pB8p4rAoMHM3cZFwzg=AuF7TDA@mail.gmail.com/ [1] Fixes: dc6667a4e7 ("riscv: Extending cpufeature.c to detect V-extension") Co-developed-by: Conor Dooley <conor.dooley@microchip.com> Signed-off-by: Conor Dooley <conor.dooley@microchip.com> Acked-by: Guo Ren <guoren@kernel.org> Link: https://lore.kernel.org/r/20240223-tidings-shabby-607f086cb4d7@spud Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>		2024-02-23 09:01:16 -08:00
..
boot	SoC: DT changes for 6.8	2024-01-11 11:23:17 -08:00
configs	Merge patch series "RISC-V SBI debug console extension support"	2024-01-11 07:36:27 -08:00
errata	Merge patch series "riscv: errata: thead: use riscv_nonstd_cache_ops for CMO"	2024-01-11 07:36:30 -08:00
include	riscv: Fix build error if !CONFIG_ARCH_ENABLE_HUGEPAGE_MIGRATION	2024-02-22 12:28:25 -08:00
kernel	RISC-V: Ignore V from the riscv,isa DT property on older T-Head CPUs	2024-02-23 09:01:16 -08:00
kvm	Generic:	2024-01-17 13:03:37 -08:00
lib	riscv: lib: Check if output in asm goto supported	2024-01-18 14:41:38 -08:00
mm	riscv: Fix build error if !CONFIG_ARCH_ENABLE_HUGEPAGE_MIGRATION	2024-02-22 12:28:25 -08:00
net	bpf: Use arch_bpf_trampoline_size	2023-12-06 17:17:20 -08:00
purgatory	riscv: Use SYM_*() assembly macros instead of deprecated ones	2023-11-06 09:42:47 -08:00
tools	riscv: Check relocations at compile time	2023-04-19 07:46:32 -07:00
Kbuild	kexec: rename ARCH_HAS_KEXEC_PURGATORY	2023-08-18 10:18:54 -07:00
Kconfig	RISC-V: Drop invalid test from CONFIG_AS_HAS_OPTION_ARCH	2024-02-16 16:07:08 -08:00
Kconfig.debug	riscv: Add tests for riscv module loading	2023-11-07 14:59:32 -08:00
Kconfig.errata	RISC-V Patches for the 6.8 Merge Window, Part 4	2024-01-20 11:06:04 -08:00
Kconfig.socs	SoC driver updates for 6.7	2023-11-01 14:46:51 -10:00
Makefile	riscv: add dependency among Image(.gz), loader(.bin), and vmlinuz.efi	2024-01-17 18:18:20 -08:00
Makefile.postlink	kbuild: remove ARCH_POSTLINK from module builds	2023-10-28 21:10:08 +09:00