On Mon, 16 Dec 2024 08:37:13 PST (-0800), c...@cyyself.name wrote:
There should be no svvptc in the riscv-ext-bitmask.def file since it has
not yet been added to the RISC-V C API Specification or the Linux
hwprobe. And there is no need for userspace software to know that this
extension exists. So remove it from the riscv-ext-bitmask.def file.

Fixes: e4f4b2dc08 ("RISC-V: Minimal support for svvptc extension.")
Signed-off-by: Yangyu Chen <c...@cyyself.name>

gcc/ChangeLog:

        * common/config/riscv/riscv-ext-bitmask.def (RISCV_EXT_BITMASK): Remove 
svvptc.
---
 gcc/common/config/riscv/riscv-ext-bitmask.def | 1 -
 1 file changed, 1 deletion(-)

diff --git a/gcc/common/config/riscv/riscv-ext-bitmask.def 
b/gcc/common/config/riscv/riscv-ext-bitmask.def
index a733533df98..ca5df1740f3 100644
--- a/gcc/common/config/riscv/riscv-ext-bitmask.def
+++ b/gcc/common/config/riscv/riscv-ext-bitmask.def
@@ -79,6 +79,5 @@ RISCV_EXT_BITMASK ("zcd",           1,  4)
 RISCV_EXT_BITMASK ("zcf",            1,  5)
 RISCV_EXT_BITMASK ("zcmop",          1,  6)
 RISCV_EXT_BITMASK ("zawrs",          1,  7)
-RISCV_EXT_BITMASK ("svvptc",         1,  8)

 #undef RISCV_EXT_BITMASK

Reviewed-by: Palmer Dabbelt <pal...@rivosinc.com>
Acked-by: Palmer Dabbelt <pal...@rivosinc.com>

I think we'll likely never expose this to userspace, the mappings are all hidden behind kernel interfaces so userspace shouldn't need to know.

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