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riscv: Improve description for RISCV_ISA_SVPBMT Kconfig symbol

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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>
This commit is contained in:
Heiko Stuebner 2022-05-26 22:56:43 +02:00 committed by Palmer Dabbelt
parent 237c0ee474
commit 924cbb8cbe
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GPG Key ID: 2E1319F35FBB1889
1 changed files with 7 additions and 2 deletions
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arch/riscv/Kconfig
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@ -364,8 +364,13 @@ config RISCV_ISA_SVPBMT
select RISCV_ALTERNATIVE select RISCV_ALTERNATIVE
default y default y
help help
Adds support to dynamically detect the presence of the SVPBMT extension Adds support to dynamically detect the presence of the SVPBMT
(Supervisor-mode: page-based memory types) and enable its usage. 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. The SVPBMT extension is only available on 64Bit cpus.