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Thu, 11 Apr 2024 21:11:48 -0700 (PDT) From: Charlie Jenkins Date: Thu, 11 Apr 2024 21:11:15 -0700 Subject: [PATCH 09/19] riscv: uaccess: Add alternative for xtheadvector uaccess MIME-Version: 1.0 Message-Id: <20240411-dev-charlie-support_thead_vector_6_9-v1-9-4af9815ec746@rivosinc.com> References: <20240411-dev-charlie-support_thead_vector_6_9-v1-0-4af9815ec746@rivosinc.com> In-Reply-To: <20240411-dev-charlie-support_thead_vector_6_9-v1-0-4af9815ec746@rivosinc.com> To: Conor Dooley , Rob Herring , Krzysztof Kozlowski , Paul Walmsley , Palmer Dabbelt , Albert Ou , Guo Ren , Conor Dooley , Chen-Yu Tsai , Jernej Skrabec , Samuel Holland , Conor Dooley , Evan Green , =?utf-8?b?Q2zDqW1lbnQgTMOpZ2Vy?= , Jonathan Corbet , Shuah Khan Cc: linux-riscv@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Palmer Dabbelt , linux-arm-kernel@lists.infradead.org, linux-sunxi@lists.linux.dev, linux-doc@vger.kernel.org, linux-kselftest@vger.kernel.org, Charlie Jenkins X-Mailer: b4 0.13.0 X-Developer-Signature: v=1; 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X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org 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 --- 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