From 936100d4507f2e9f0be4621b0c698180d65e8264 Mon Sep 17 00:00:00 2001 From: Palmer Dabbelt Date: Tue, 6 Dec 2022 18:08:13 -0800 Subject: [PATCH] Documentation: RISC-V: Allow patches for non-standard behavior The patch acceptance policy forbids accepting support for non-standard behavior. This policy was written in order to both steer implementers towards the standards and to avoid coupling the upstream kernel too tightly to vendor-specific features. Those were good goals, but in practice the policy just isn't working: every RISC-V system we have needs vendor-specific behavior in the kernel and we end up taking that support which violates the policy. That's confusing for contributors, which is the main reason we have a written policy in the first place. So let's just start taking code for vendor-defined behavior. Reviewed-by: Conor Dooley Reviewed-by: Anup Patel Signed-off-by: Paul Walmsley Link: https://lore.kernel.org/all/alpine.DEB.2.21.999.2211181027590.4480@utopia.booyaka.com/ [Palmer: merge in Paul's suggestions] Link: https://lore.kernel.org/r/20221207020815.16214-3-palmer@rivosinc.com Signed-off-by: Palmer Dabbelt --- Documentation/riscv/patch-acceptance.rst | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-) diff --git a/Documentation/riscv/patch-acceptance.rst b/Documentation/riscv/patch-acceptance.rst index 5da6f9b..d9d6285 100644 --- a/Documentation/riscv/patch-acceptance.rst +++ b/Documentation/riscv/patch-acceptance.rst @@ -29,7 +29,11 @@ their own custom extensions. These custom extensions aren't required to go through any review or ratification process by the RISC-V Foundation. To avoid the maintenance complexity and potential performance impact of adding kernel code for implementor-specific -RISC-V extensions, we'll only accept patches for extensions that -have been officially frozen or ratified by the RISC-V Foundation. -(Implementors, may, of course, maintain their own Linux kernel trees -containing code for any custom extensions that they wish.) +RISC-V extensions, we'll only consider patches for extensions that either: + +- Have been officially frozen or ratified by the RISC-V Foundation, or +- Have been implemented in hardware that is widely available, per standard + Linux practice. + +(Implementors, may, of course, maintain their own Linux kernel trees containing +code for any custom extensions that they wish.) -- 2.7.4