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From: Charlie Jenkins <charlie@rivosinc.com>
Date: Thu, 11 Apr 2024 21:11:15 -0700
Subject: [PATCH 09/19] riscv: uaccess: Add alternative for xtheadvector
uaccess
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To: Conor Dooley <conor@kernel.org>, Rob Herring <robh@kernel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
Paul Walmsley <paul.walmsley@sifive.com>,
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=?utf-8?b?Q2zDqW1lbnQgTMOpZ2Vy?= <cleger@rivosinc.com>,
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Cc: linux-riscv@lists.infradead.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org, Palmer Dabbelt <palmer@rivosinc.com>,
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| Series |
[01/19] dt-bindings: riscv: Add vendorid and archid
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expand
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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
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(+)