From e47bddcb2ec531022a915f896f13586470b593d0 Mon Sep 17 00:00:00 2001 From: Heiko Stuebner Date: Mon, 5 Sep 2022 13:10:23 +0200 Subject: riscv: cleanup svpbmt cpufeature probing For better readability (and compile time coverage) use IS_ENABLED instead of ifdef and drop the new unneeded switch statement. Signed-off-by: Heiko Stuebner Reviewed-by: Guo Ren Reviewed-by: Conor Dooley Reviewed-by: Andrew Jones Link: https://lore.kernel.org/r/20220905111027.2463297-2-heiko@sntech.de Signed-off-by: Palmer Dabbelt --- arch/riscv/kernel/cpufeature.c | 13 +++++-------- 1 file changed, 5 insertions(+), 8 deletions(-) (limited to 'arch/riscv/kernel') diff --git a/arch/riscv/kernel/cpufeature.c b/arch/riscv/kernel/cpufeature.c index 553d755483ed..764ea220161f 100644 --- a/arch/riscv/kernel/cpufeature.c +++ b/arch/riscv/kernel/cpufeature.c @@ -253,16 +253,13 @@ void __init riscv_fill_hwcap(void) #ifdef CONFIG_RISCV_ALTERNATIVE static bool __init_or_module cpufeature_probe_svpbmt(unsigned int stage) { -#ifdef CONFIG_RISCV_ISA_SVPBMT - switch (stage) { - case RISCV_ALTERNATIVES_EARLY_BOOT: + if (!IS_ENABLED(CONFIG_RISCV_ISA_SVPBMT)) return false; - default: - return riscv_isa_extension_available(NULL, SVPBMT); - } -#endif - return false; + if (stage == RISCV_ALTERNATIVES_EARLY_BOOT) + return false; + + return riscv_isa_extension_available(NULL, SVPBMT); } static bool __init_or_module cpufeature_probe_zicbom(unsigned int stage) -- cgit v1.2.3 From f055268e3946555deb9bb80b2c8c9798c64dbc47 Mon Sep 17 00:00:00 2001 From: Heiko Stuebner Date: Mon, 5 Sep 2022 13:10:24 +0200 Subject: riscv: drop some idefs from CMO initialization Wrapping things in #ifdefs makes the code harder to read while we also have IS_ENABLED() macros to do this in regular code and the extension detection is not _that_ runtime critical. So define a stub for riscv_noncoherent_supported() in the non-CONFIG_RISCV_DMA_NONCOHERENT case and move the code to us IS_ENABLED. Suggested-by: Conor Dooley Signed-off-by: Heiko Stuebner Reviewed-by: Guo Ren Reviewed-by: Conor Dooley Reviewed-by: Andrew Jones Link: https://lore.kernel.org/r/20220905111027.2463297-3-heiko@sntech.de Signed-off-by: Palmer Dabbelt --- arch/riscv/errata/thead/errata.c | 7 +++---- arch/riscv/include/asm/cacheflush.h | 2 ++ arch/riscv/kernel/cpufeature.c | 22 +++++++++------------- 3 files changed, 14 insertions(+), 17 deletions(-) (limited to 'arch/riscv/kernel') diff --git a/arch/riscv/errata/thead/errata.c b/arch/riscv/errata/thead/errata.c index 202c83f677b2..bffa711aaf64 100644 --- a/arch/riscv/errata/thead/errata.c +++ b/arch/riscv/errata/thead/errata.c @@ -30,7 +30,9 @@ static bool errata_probe_pbmt(unsigned int stage, static bool errata_probe_cmo(unsigned int stage, unsigned long arch_id, unsigned long impid) { -#ifdef CONFIG_ERRATA_THEAD_CMO + if (!IS_ENABLED(CONFIG_ERRATA_THEAD_CMO)) + return false; + if (arch_id != 0 || impid != 0) return false; @@ -39,9 +41,6 @@ static bool errata_probe_cmo(unsigned int stage, riscv_noncoherent_supported(); return true; -#else - return false; -#endif } static u32 thead_errata_probe(unsigned int stage, diff --git a/arch/riscv/include/asm/cacheflush.h b/arch/riscv/include/asm/cacheflush.h index a60acaecfeda..4363d0beb38a 100644 --- a/arch/riscv/include/asm/cacheflush.h +++ b/arch/riscv/include/asm/cacheflush.h @@ -50,6 +50,8 @@ static inline void riscv_init_cbom_blocksize(void) { } #ifdef CONFIG_RISCV_DMA_NONCOHERENT void riscv_noncoherent_supported(void); +#else +static inline void riscv_noncoherent_supported(void) {} #endif /* diff --git a/arch/riscv/kernel/cpufeature.c b/arch/riscv/kernel/cpufeature.c index 764ea220161f..729f7a218093 100644 --- a/arch/riscv/kernel/cpufeature.c +++ b/arch/riscv/kernel/cpufeature.c @@ -264,21 +264,17 @@ static bool __init_or_module cpufeature_probe_svpbmt(unsigned int stage) static bool __init_or_module cpufeature_probe_zicbom(unsigned int stage) { -#ifdef CONFIG_RISCV_ISA_ZICBOM - switch (stage) { - case RISCV_ALTERNATIVES_EARLY_BOOT: + if (!IS_ENABLED(CONFIG_RISCV_ISA_ZICBOM)) + return false; + + if (stage == RISCV_ALTERNATIVES_EARLY_BOOT) + return false; + + if (!riscv_isa_extension_available(NULL, ZICBOM)) return false; - default: - if (riscv_isa_extension_available(NULL, ZICBOM)) { - riscv_noncoherent_supported(); - return true; - } else { - return false; - } - } -#endif - return false; + riscv_noncoherent_supported(); + return true; } /* -- cgit v1.2.3 From e283187c034cd80c1dd98ad732c73ce930a5efa4 Mon Sep 17 00:00:00 2001 From: Heiko Stuebner Date: Mon, 5 Sep 2022 13:10:26 +0200 Subject: riscv: use BIT() marco for cpufeature probing Using the appropriate BIT macro makes the code better readable. Suggested-by: Conor Dooley Signed-off-by: Heiko Stuebner Reviewed-by: Conor Dooley Link: https://lore.kernel.org/r/20220905111027.2463297-5-heiko@sntech.de Signed-off-by: Palmer Dabbelt --- arch/riscv/kernel/cpufeature.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'arch/riscv/kernel') diff --git a/arch/riscv/kernel/cpufeature.c b/arch/riscv/kernel/cpufeature.c index 729f7a218093..08f7445985dc 100644 --- a/arch/riscv/kernel/cpufeature.c +++ b/arch/riscv/kernel/cpufeature.c @@ -289,10 +289,10 @@ static u32 __init_or_module cpufeature_probe(unsigned int stage) u32 cpu_req_feature = 0; if (cpufeature_probe_svpbmt(stage)) - cpu_req_feature |= (1U << CPUFEATURE_SVPBMT); + cpu_req_feature |= BIT(CPUFEATURE_SVPBMT); if (cpufeature_probe_zicbom(stage)) - cpu_req_feature |= (1U << CPUFEATURE_ZICBOM); + cpu_req_feature |= BIT(CPUFEATURE_ZICBOM); return cpu_req_feature; } -- cgit v1.2.3