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authorHeiko Stuebner <heiko@sntech.de>2022-05-26 22:56:43 +0200
committerPalmer Dabbelt <palmer@rivosinc.com>2022-06-17 00:47:39 +0200
commit924cbb8cbe3460ea192e6243017ceb0ceb255b1b (patch)
treea0c1ae15f500d4462020e245b15933b19b945f9b /arch/riscv/Kconfig
parentriscv: drop cpufeature_apply_feature tracking variable (diff)
downloadlinux-924cbb8cbe3460ea192e6243017ceb0ceb255b1b.tar.xz
linux-924cbb8cbe3460ea192e6243017ceb0ceb255b1b.zip
riscv: Improve description for RISCV_ISA_SVPBMT Kconfig symbol
This improves the symbol's description to make it easier for people to understand what it is about. Suggested-by: Christoph Hellwig <hch@lst.de> Suggested-by: Philipp Tomsich <philipp.tomsich@vrull.eu> Signed-off-by: Heiko Stuebner <heiko@sntech.de> Reviewed-by: Guo Ren <guoren@kernel.org> Link: https://lore.kernel.org/r/20220526205646.258337-3-heiko@sntech.de Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Diffstat (limited to '')
-rw-r--r--arch/riscv/Kconfig9
1 files changed, 7 insertions, 2 deletions
diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
index c22f58155948..32ffef9f6e5b 100644
--- a/arch/riscv/Kconfig
+++ b/arch/riscv/Kconfig
@@ -364,8 +364,13 @@ config RISCV_ISA_SVPBMT
select RISCV_ALTERNATIVE
default y
help
- Adds support to dynamically detect the presence of the SVPBMT extension
- (Supervisor-mode: page-based memory types) and enable its usage.
+ Adds support to dynamically detect the presence of the SVPBMT
+ ISA-extension (Supervisor-mode: page-based memory types) and
+ enable its usage.
+
+ The memory type for a page contains a combination of attributes
+ that indicate the cacheability, idempotency, and ordering
+ properties for access to that page.
The SVPBMT extension is only available on 64Bit cpus.