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Message-Id: <20251210-profiles-v1-9-315a6ff2ca5a@gmail.com> Date: Wed, 10 Dec 2025 08:13:46 -0800 From: Charlie Jenkins <charlie@...osinc.com> To: Paul Walmsley <pjw@...nel.org>, Palmer Dabbelt <palmer@...belt.com>, Alexandre Ghiti <alex@...ti.fr>, Anup Patel <anup@...infault.org>, Atish Patra <atish.patra@...ux.dev>, Samuel Holland <samuel.holland@...ive.com>, Björn Töpel <bjorn@...nel.org>, Luke Nelson <luke.r.nels@...il.com>, Xi Wang <xi.wang@...il.com>, Eric Biggers <ebiggers@...nel.org>, Conor Dooley <conor@...nel.org> Cc: linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org, Charlie Jenkins <thecharlesjenkins@...il.com> Subject: [PATCH RFC 09/10] riscv: kconfig: Add rva23 config Add CONFIG_RISCV_ISA_RVA23 to select all rva23 mandatory extensions. This also introduces a new class of kernel binaries, portable rva23 compatible binaries. This option does not require NONPORTABLE because profiles are expected to be portable between systems. Signed-off-by: Charlie Jenkins <thecharlesjenkins@...il.com> --- arch/riscv/Kconfig.extensions | 99 ++++++++++++++++++++++++++++++------------- 1 file changed, 70 insertions(+), 29 deletions(-) diff --git a/arch/riscv/Kconfig.extensions b/arch/riscv/Kconfig.extensions index e400fd5574f7..38b655e480a8 100644 --- a/arch/riscv/Kconfig.extensions +++ b/arch/riscv/Kconfig.extensions @@ -4,6 +4,33 @@ # see Documentation/kbuild/kconfig-language.rst. # +# Profiles + +config RISCV_ISA_RVA23 + bool "Enable rva23 extensions" + default n + select RISCV_ISA_SUPM + select RISCV_ISA_SVNAPOT + select RISCV_ISA_SVPBMT + select RISCV_ISA_ZAWRS + select RISCV_ISA_ZBA + select RISCV_ISA_ZBB + select RISCV_ISA_ZBC + select RISCV_ISA_ZBKB + select RISCV_ISA_ZICBOM + select RISCV_ISA_ZICBOZ + select RISCV_ISA_ZICBOP + select RISCV_ISA_V + help + The RVA23 profile is a grouping of extensions that are expected to be + available on server and application CPUs. + + Enabling this config will cause the kernel to fail to boot on platforms + that are not rva23 compliant. + + Say "y" here to optimize the kernel for rva23 compliant platforms. + + If you don't know what to do here, say "n". # Base extensions @@ -64,7 +91,7 @@ config RISCV_ISA_D config RISCV_ISA_SUPM tristate "Supm extension for userspace pointer masking" depends on 64BIT - depends on NONPORTABLE || m + depends on NONPORTABLE || RISCV_ISA_RVA23 || m default m help Add support for pointer masking in userspace (Supm) when the @@ -75,14 +102,15 @@ config RISCV_ISA_SUPM Select "m" for boot-time detection for portability. - Select "y" for compile-time optimization. Only available with NONPORTABLE. + Select "y" for compile-time optimization. Only available with NONPORTABLE + or CONFIG_RISCV_ISA_RVA23. If you don't know what to do here, say m. config RISCV_ISA_SVNAPOT tristate "Svnapot extension support for supervisor mode NAPOT pages" depends on 64BIT && MMU - depends on NONPORTABLE || m + depends on NONPORTABLE || RISCV_ISA_RVA23 || m default m help The Svnapot extension is used to mark contiguous PTEs as a range @@ -95,14 +123,15 @@ config RISCV_ISA_SVNAPOT Select "m" for boot-time detection for portability. - Select "y" for compile-time optimization. Only available with NONPORTABLE. + Select "y" for compile-time optimization. Only available with NONPORTABLE + or CONFIG_RISCV_ISA_RVA23. If you don't know what to do here, say m. config RISCV_ISA_SVPBMT tristate "Svpbmt extension support for supervisor mode page-based memory types" depends on 64BIT && MMU - depends on NONPORTABLE || m + depends on NONPORTABLE || RISCV_ISA_RVA23 || m default m help The memory type for a page contains a combination of attributes @@ -113,14 +142,15 @@ config RISCV_ISA_SVPBMT Select "m" for boot-time detection for portability. - Select "y" for compile-time optimization. Only available with NONPORTABLE. + Select "y" for compile-time optimization. Only available with NONPORTABLE + or CONFIG_RISCV_ISA_RVA23. If you don't know what to do here, say m. config RISCV_ISA_ZAWRS tristate "Zawrs extension support for more efficient busy waiting" - depends on NONPORTABLE || m + depends on NONPORTABLE || RISCV_ISA_RVA23 || m default m help The Zawrs extension defines instructions to be used in polling loops @@ -139,7 +169,7 @@ config TOOLCHAIN_HAS_ZABHA config RISCV_ISA_ZABHA tristate "Zabha extension support for atomic byte/halfword operations" depends on TOOLCHAIN_HAS_ZABHA - depends on NONPORTABLE || m + depends on NONPORTABLE || RISCV_ISA_RVA23 || m default m help Enable the use of the Zabha ISA-extension to implement kernel @@ -147,7 +177,8 @@ config RISCV_ISA_ZABHA Select "m" for boot-time detection for portability. - Select "y" for compile-time optimization. Only available with NONPORTABLE. + Select "y" for compile-time optimization. Only available with NONPORTABLE + or CONFIG_RISCV_ISA_RVA23. If you don't know what to do here, say m. @@ -161,7 +192,7 @@ config TOOLCHAIN_HAS_ZACAS config RISCV_ISA_ZACAS tristate "Zacas extension support for atomic CAS" depends on TOOLCHAIN_HAS_ZACAS - depends on NONPORTABLE || m + depends on NONPORTABLE || RISCV_ISA_RVA23 || m default m help Enable the use of the Zacas ISA-extension to implement kernel atomic @@ -169,7 +200,8 @@ config RISCV_ISA_ZACAS Select "m" for boot-time detection for portability. - Select "y" for compile-time optimization. Only available with NONPORTABLE. + Select "y" for compile-time optimization. Only available with NONPORTABLE + or CONFIG_RISCV_ISA_RVA23. If you don't know what to do here, say m. @@ -183,7 +215,7 @@ config TOOLCHAIN_HAS_ZBA config RISCV_ISA_ZBA tristate "Zba extension support for bit manipulation instructions" - depends on NONPORTABLE || m + depends on NONPORTABLE || RISCV_ISA_RVA23 || m default m help The Zba extension provides instructions to accelerate the generation @@ -191,7 +223,8 @@ config RISCV_ISA_ZBA Select "m" for boot-time detection for portability. - Select "y" for compile-time detection for optimization. Only available with NONPORTABLE. + Select "y" for compile-time detection for optimization. Only available with NONPORTABLE + or CONFIG_RISCV_ISA_RVA23. If you don't know what to do here, say m. @@ -205,7 +238,7 @@ config TOOLCHAIN_HAS_ZBB config RISCV_ISA_ZBB tristate "Zbb extension support for bit manipulation instructions" - depends on NONPORTABLE || m + depends on NONPORTABLE || RISCV_ISA_RVA23 || m default m help The Zbb extension provides instructions to accelerate a number @@ -214,7 +247,8 @@ config RISCV_ISA_ZBB Select "m" for boot-time detection for portability. - Select "y" for compile-time optimization. Only available with NONPORTABLE. + Select "y" for compile-time optimization. Only available with NONPORTABLE + or CONFIG_RISCV_ISA_RVA23. If you don't know what to do here, say m. @@ -228,7 +262,7 @@ config TOOLCHAIN_HAS_ZBC config RISCV_ISA_ZBC tristate "Zbc extension support for carry-less multiplication instructions" - depends on NONPORTABLE || m + depends on NONPORTABLE || RISCV_ISA_RVA23 || m default m help The Zbc extension could accelerate CRC (cyclic redundancy check) @@ -236,7 +270,8 @@ config RISCV_ISA_ZBC Select "m" for boot-time detection for portability. - Select "y" for compile-time detection for optimization. Only available with NONPORTABLE. + Select "y" for compile-time detection for optimization. Only available with NONPORTABLE + or CONFIG_RISCV_ISA_RVA23. If you don't know what to do here, say m. @@ -250,7 +285,7 @@ config TOOLCHAIN_HAS_ZBKB config RISCV_ISA_ZBKB tristate "Zbkb extension support for bit manipulation instructions" - depends on NONPORTABLE || m + depends on NONPORTABLE || RISCV_ISA_RVA23 || m default m help The Zbkb extension provides instructions to accelerate a number @@ -258,14 +293,15 @@ config RISCV_ISA_ZBKB Select "m" for boot-time detection for portability. - Select "y" for compile-time detection for optimization. Only available with NONPORTABLE. + Select "y" for compile-time detection for optimization. Only available with NONPORTABLE + or CONFIG_RISCV_ISA_RVA23. If you don't know what to do here, say m. config RISCV_ISA_ZICBOM bool "Zicbom extension support for non-coherent DMA operation" depends on MMU - depends on NONPORTABLE || m + depends on NONPORTABLE || RISCV_ISA_RVA23 || m default m select RISCV_DMA_NONCOHERENT select DMA_DIRECT_REMAP @@ -275,13 +311,14 @@ config RISCV_ISA_ZICBOM Select "m" for boot-time detection for portability. - Select "y" for compile-time optimization. Only available with NONPORTABLE. + Select "y" for compile-time optimization. Only available with NONPORTABLE + or CONFIG_RISCV_ISA_RVA23. If you don't know what to do here, say m. config RISCV_ISA_ZICBOZ bool "Zicboz extension support for faster zeroing of memory" - depends on NONPORTABLE || m + depends on NONPORTABLE || RISCV_ISA_RVA23 || m default m help Enable the use of the Zicboz extension (cbo.zero instruction) @@ -291,14 +328,15 @@ config RISCV_ISA_ZICBOZ Select "m" for boot-time detection for portability. - Select "y" for compile-time detection for optimization. Only available with NONPORTABLE. + Select "y" for compile-time detection for optimization. Only available with NONPORTABLE + or CONFIG_RISCV_ISA_RVA23. If you don't know what to do here, say m. config RISCV_ISA_ZICBOP bool "Zicbop extension support for cache block prefetch" depends on MMU - depends on NONPORTABLE || m + depends on NONPORTABLE || RISCV_ISA_RVA23 || m default m help The Zicbop extension can be used to prefetch cache blocks for @@ -306,7 +344,8 @@ config RISCV_ISA_ZICBOP Select "m" for boot-time detection for portability. - Select "y" for compile-time detection for optimization. Only available with NONPORTABLE. + Select "y" for compile-time detection for optimization. Only available with NONPORTABLE + or CONFIG_RISCV_ISA_RVA23. If you don't know what to do here, say m. @@ -348,7 +387,7 @@ config RISCV_ISA_V depends on FPU select DYNAMIC_SIGFRAME select RISCV_ISA_ZVE32X - depends on NONPORTABLE || m + depends on NONPORTABLE || RISCV_ISA_RVA23 || m default m help Say N here if you want to disable all vector related procedure @@ -356,20 +395,22 @@ config RISCV_ISA_V Select "m" for boot-time detection for portability. - Select "y" for compile-time detection for optimization. Only available with NONPORTABLE. + Select "y" for compile-time detection for optimization. Only available with NONPORTABLE + or CONFIG_RISCV_ISA_RVA23. If you don't know what to do here, say m. config RISCV_ISA_ZVE32X tristate "zve32x extension support" - depends on NONPORTABLE || m + depends on NONPORTABLE || RISCV_ISA_RVA23 || m default m help zve23x is a subset of the vector extension. Can be enabled for minimal vector support. Select "m" for boot-time detection for portability. - Select "y" for compile-time detection for optimization. Only available with NONPORTABLE. + Select "y" for compile-time detection for optimization. Only available with NONPORTABLE + or CONFIG_RISCV_ISA_RVA23. If you don't know what to do here, say m. -- 2.43.0
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