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charset=UTF-8 Content-Transfer-Encoding: 8bit On 23/06/2024 17:42, Conor Dooley wrote: > On Wed, Jun 19, 2024 at 01:35:18PM +0200, Clément Léger wrote: >> The Zc* standard extension for code reduction introduces new extensions. >> This patch adds support for Zca, Zcf, Zcd and Zcb. Zce, Zcmt and Zcmp >> are left out of this patch since they are targeting microcontrollers/ >> embedded CPUs instead of application processors. >> >> Signed-off-by: Clément Léger >> Reviewed-by: Conor Dooley >> --- >> arch/riscv/include/asm/hwcap.h | 4 +++ >> arch/riscv/kernel/cpufeature.c | 55 +++++++++++++++++++++++++++++++++- >> 2 files changed, 58 insertions(+), 1 deletion(-) >> >> diff --git a/arch/riscv/include/asm/hwcap.h b/arch/riscv/include/asm/hwcap.h >> index 18859277843a..b12ae3f2141c 100644 >> --- a/arch/riscv/include/asm/hwcap.h >> +++ b/arch/riscv/include/asm/hwcap.h >> @@ -87,6 +87,10 @@ >> #define RISCV_ISA_EXT_ZVE64F 78 >> #define RISCV_ISA_EXT_ZVE64D 79 >> #define RISCV_ISA_EXT_ZIMOP 80 >> +#define RISCV_ISA_EXT_ZCA 81 >> +#define RISCV_ISA_EXT_ZCB 82 >> +#define RISCV_ISA_EXT_ZCD 83 >> +#define RISCV_ISA_EXT_ZCF 84 >> >> #define RISCV_ISA_EXT_XLINUXENVCFG 127 >> >> diff --git a/arch/riscv/kernel/cpufeature.c b/arch/riscv/kernel/cpufeature.c >> index a3af976f36c9..aa631fe49b7c 100644 >> --- a/arch/riscv/kernel/cpufeature.c >> +++ b/arch/riscv/kernel/cpufeature.c >> @@ -111,6 +111,9 @@ static int riscv_ext_zicboz_validate(const struct riscv_isa_ext_data *data, >> >> #define __RISCV_ISA_EXT_DATA(_name, _id) _RISCV_ISA_EXT_DATA(_name, _id, NULL, 0, NULL) >> >> +#define __RISCV_ISA_EXT_DATA_VALIDATE(_name, _id, _validate) \ >> + _RISCV_ISA_EXT_DATA(_name, _id, NULL, 0, _validate) >> + >> /* Used to declare pure "lasso" extension (Zk for instance) */ >> #define __RISCV_ISA_EXT_BUNDLE(_name, _bundled_exts) \ >> _RISCV_ISA_EXT_DATA(_name, RISCV_ISA_EXT_INVALID, _bundled_exts, \ >> @@ -122,6 +125,37 @@ static int riscv_ext_zicboz_validate(const struct riscv_isa_ext_data *data, >> #define __RISCV_ISA_EXT_SUPERSET_VALIDATE(_name, _id, _sub_exts, _validate) \ >> _RISCV_ISA_EXT_DATA(_name, _id, _sub_exts, ARRAY_SIZE(_sub_exts), _validate) >> >> +static int riscv_ext_zca_depends(const struct riscv_isa_ext_data *data, > > It's super minor, but my OCD doesn't like this being called "depends" > when the others are all called "validate". Ok, let's make a deal. You review patch 14/16 and I'll make the machine part of you happy and call this function validate ;) Thanks, Clément > >> + const unsigned long *isa_bitmap) >> +{ >> + if (__riscv_isa_extension_available(isa_bitmap, RISCV_ISA_EXT_ZCA)) >> + return 0; >> + >> + return -EPROBE_DEFER; >> +} >> +static int riscv_ext_zcd_validate(const struct riscv_isa_ext_data *data, >> + const unsigned long *isa_bitmap) >> +{ >> + if (__riscv_isa_extension_available(isa_bitmap, RISCV_ISA_EXT_ZCA) && >> + __riscv_isa_extension_available(isa_bitmap, RISCV_ISA_EXT_d)) >> + return 0; >> + >> + return -EPROBE_DEFER; >> +} >> + >> +static int riscv_ext_zcf_validate(const struct riscv_isa_ext_data *data, >> + const unsigned long *isa_bitmap) >> +{ >> + if (IS_ENABLED(CONFIG_64BIT)) >> + return -EINVAL; >> + >> + if (__riscv_isa_extension_available(isa_bitmap, RISCV_ISA_EXT_ZCA) && >> + __riscv_isa_extension_available(isa_bitmap, RISCV_ISA_EXT_f)) >> + return 0; >> + >> + return -EPROBE_DEFER; >> +}