From 37f988dcec056532820fb7c3e9a8367fd19f6c1b Mon Sep 17 00:00:00 2001 From: Conor Dooley Date: Thu, 13 Jul 2023 13:11:03 +0100 Subject: [PATCH] RISC-V: repurpose riscv_isa_ext array in riscv_fill_hwcap() In riscv_fill_hwcap() riscv_isa_ext array can be looped over, rather than duplicating the list of extensions with individual SET_ISA_EXT_MAP() usage. While at it, drop the statement-of-the-obvious comments from the struct, rename uprop to something more suitable for its new use & constify the members. Reviewed-by: Andrew Jones Signed-off-by: Conor Dooley Link: https://lore.kernel.org/r/20230713-dastardly-affiliate-4cf819dccde2@wendy Signed-off-by: Palmer Dabbelt --- arch/riscv/include/asm/hwcap.h | 7 ++----- arch/riscv/kernel/cpu.c | 5 +++-- arch/riscv/kernel/cpufeature.c | 30 +++++++++--------------------- 3 files changed, 14 insertions(+), 28 deletions(-) diff --git a/arch/riscv/include/asm/hwcap.h b/arch/riscv/include/asm/hwcap.h index 7a57e61..2460ac2 100644 --- a/arch/riscv/include/asm/hwcap.h +++ b/arch/riscv/include/asm/hwcap.h @@ -55,7 +55,6 @@ #define RISCV_ISA_EXT_ZIHPM 42 #define RISCV_ISA_EXT_MAX 64 -#define RISCV_ISA_EXT_NAME_LEN_MAX 32 #ifdef CONFIG_RISCV_M_MODE #define RISCV_ISA_EXT_SxAIA RISCV_ISA_EXT_SMAIA @@ -70,10 +69,8 @@ unsigned long riscv_get_elf_hwcap(void); struct riscv_isa_ext_data { - /* Name of the extension displayed to userspace via /proc/cpuinfo */ - char uprop[RISCV_ISA_EXT_NAME_LEN_MAX]; - /* The logical ISA extension ID */ - unsigned int isa_ext_id; + const unsigned int id; + const char *name; }; extern const struct riscv_isa_ext_data riscv_isa_ext[]; diff --git a/arch/riscv/kernel/cpu.c b/arch/riscv/kernel/cpu.c index bf93293..aa17eeb 100644 --- a/arch/riscv/kernel/cpu.c +++ b/arch/riscv/kernel/cpu.c @@ -168,9 +168,10 @@ static void print_isa_ext(struct seq_file *f) { for (int i = 0; i < riscv_isa_ext_count; i++) { const struct riscv_isa_ext_data *edata = &riscv_isa_ext[i]; - if (!__riscv_isa_extension_available(NULL, edata->isa_ext_id)) + if (!__riscv_isa_extension_available(NULL, edata->id)) continue; - seq_printf(f, "_%s", edata->uprop); + + seq_printf(f, "_%s", edata->name); } } diff --git a/arch/riscv/kernel/cpufeature.c b/arch/riscv/kernel/cpufeature.c index fb47615..859e383 100644 --- a/arch/riscv/kernel/cpufeature.c +++ b/arch/riscv/kernel/cpufeature.c @@ -99,11 +99,10 @@ static bool riscv_isa_extension_check(int id) return true; } -#define __RISCV_ISA_EXT_DATA(UPROP, EXTID) \ - { \ - .uprop = #UPROP, \ - .isa_ext_id = EXTID, \ - } +#define __RISCV_ISA_EXT_DATA(_name, _id) { \ + .name = #_name, \ + .id = _id, \ +} /* * The canonical order of ISA extension names in the ISA string is defined in @@ -350,8 +349,8 @@ void __init riscv_fill_hwcap(void) #define SET_ISA_EXT_MAP(name, bit) \ do { \ - if ((ext_end - ext == sizeof(name) - 1) && \ - !strncasecmp(ext, name, sizeof(name) - 1) && \ + if ((ext_end - ext == strlen(name)) && \ + !strncasecmp(ext, name, strlen(name)) && \ riscv_isa_extension_check(bit)) \ set_bit(bit, isainfo->isa); \ } while (false) \ @@ -366,20 +365,9 @@ void __init riscv_fill_hwcap(void) set_bit(nr, isainfo->isa); } } else { - /* sorted alphabetically */ - SET_ISA_EXT_MAP("smaia", RISCV_ISA_EXT_SMAIA); - SET_ISA_EXT_MAP("ssaia", RISCV_ISA_EXT_SSAIA); - SET_ISA_EXT_MAP("sscofpmf", RISCV_ISA_EXT_SSCOFPMF); - SET_ISA_EXT_MAP("sstc", RISCV_ISA_EXT_SSTC); - SET_ISA_EXT_MAP("svinval", RISCV_ISA_EXT_SVINVAL); - SET_ISA_EXT_MAP("svnapot", RISCV_ISA_EXT_SVNAPOT); - SET_ISA_EXT_MAP("svpbmt", RISCV_ISA_EXT_SVPBMT); - SET_ISA_EXT_MAP("zba", RISCV_ISA_EXT_ZBA); - SET_ISA_EXT_MAP("zbb", RISCV_ISA_EXT_ZBB); - SET_ISA_EXT_MAP("zbs", RISCV_ISA_EXT_ZBS); - SET_ISA_EXT_MAP("zicbom", RISCV_ISA_EXT_ZICBOM); - SET_ISA_EXT_MAP("zicboz", RISCV_ISA_EXT_ZICBOZ); - SET_ISA_EXT_MAP("zihintpause", RISCV_ISA_EXT_ZIHINTPAUSE); + for (int i = 0; i < riscv_isa_ext_count; i++) + SET_ISA_EXT_MAP(riscv_isa_ext[i].name, + riscv_isa_ext[i].id); } #undef SET_ISA_EXT_MAP } -- 2.7.4