[PATCH 09/19] riscv: uaccess: Add alternative for xtheadvector uaccess

Charlie Jenkins
2024-04-12T04:13:25Z

At this time, use the fallback uaccess routines rather than customizing
the vectorized uaccess routines to be compatible with xtheadvector.

Signed-off-by: Charlie Jenkins <charlie@rivosinc.com>
---
arch/riscv/lib/uaccess.S | 1 +
1 file changed, 1 insertion(+)

diff --git a/arch/riscv/lib/uaccess.S b/arch/riscv/lib/uaccess.S
index bc22c078aba8..74bd75b673d7 100644
--- a/arch/riscv/lib/uaccess.S
+++ b/arch/riscv/lib/uaccess.S
@@ -15,6 +15,7 @@
SYM_FUNC_START(__asm_copy_to_user)
#ifdef CONFIG_RISCV_ISA_V
ALTERNATIVE("j fallback_scalar_usercopy", "nop", 0, RISCV_ISA_EXT_v, CONFIG_RISCV_ISA_V)
+ ALTERNATIVE("nop", "j fallback_scalar_usercopy", 0, RISCV_ISA_VENDOR_EXT_XTHEADVECTOR, CONFIG_RISCV_ISA_V)
REG_L t0, riscv_v_usercopy_threshold
bltu a2, t0, fallback_scalar_usercopy
tail enter_vector_usercopy

--
2.44.0