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| author | Charlie Jenkins <charlie@rivosinc.com> | 2024-07-19 09:15:18 -0700 |
|---|---|---|
| committer | Palmer Dabbelt <palmer@rivosinc.com> | 2024-07-22 15:36:54 -0700 |
| commit | 23c996fc2bc1978a02c64eddb90b4ab5d309c8df (patch) | |
| tree | d668d065eb0e3aab62c1d766fad8376a3f78dc1c /arch/riscv/errata/andes/errata.c | |
| parent | 5ee121a39330e437cae0d64feeb459c7ec9e9500 (diff) | |
| download | linux-23c996fc2bc1978a02c64eddb90b4ab5d309c8df.tar.gz linux-23c996fc2bc1978a02c64eddb90b4ab5d309c8df.tar.bz2 linux-23c996fc2bc1978a02c64eddb90b4ab5d309c8df.zip | |
riscv: Extend cpufeature.c to detect vendor extensions
Instead of grouping all vendor extensions into the same riscv_isa_ext
that standard instructions use, create a struct
"riscv_isa_vendor_ext_data_list" that allows each vendor to maintain
their vendor extensions independently of the standard extensions.
xandespmu is currently the only vendor extension so that is the only
extension that is affected by this change.
An additional benefit of this is that the extensions of each vendor can
be conditionally enabled. A config RISCV_ISA_VENDOR_EXT_ANDES has been
added to allow for that.
Signed-off-by: Charlie Jenkins <charlie@rivosinc.com>
Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
Reviewed-by: Andy Chiu <andy.chiu@sifive.com>
Tested-by: Yu Chien Peter Lin <peterlin@andestech.com>
Reviewed-by: Yu Chien Peter Lin <peterlin@andestech.com>
Link: https://lore.kernel.org/r/20240719-support_vendor_extensions-v3-1-0af7587bbec0@rivosinc.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Diffstat (limited to 'arch/riscv/errata/andes/errata.c')
| -rw-r--r-- | arch/riscv/errata/andes/errata.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/riscv/errata/andes/errata.c b/arch/riscv/errata/andes/errata.c index f2708a9494a1..fc1a34faa5f3 100644 --- a/arch/riscv/errata/andes/errata.c +++ b/arch/riscv/errata/andes/errata.c @@ -17,6 +17,7 @@ #include <asm/processor.h> #include <asm/sbi.h> #include <asm/vendorid_list.h> +#include <asm/vendor_extensions.h> #define ANDES_AX45MP_MARCHID 0x8000000000008a45UL #define ANDES_AX45MP_MIMPID 0x500UL @@ -65,6 +66,8 @@ void __init_or_module andes_errata_patch_func(struct alt_entry *begin, struct al unsigned long archid, unsigned long impid, unsigned int stage) { + BUILD_BUG_ON(ERRATA_ANDES_NUMBER >= RISCV_VENDOR_EXT_ALTERNATIVES_BASE); + if (stage == RISCV_ALTERNATIVES_BOOT) errata_probe_iocp(stage, archid, impid); |