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[220.132.236.182]) by smtp.gmail.com with ESMTPSA id 28sm618810pgl.42.2020.02.20.18.48.44 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Thu, 20 Feb 2020 18:48:45 -0800 (PST) From: Vincent Chen To: paul.walmsley@sifive.com, palmer@dabbelt.com Subject: [PATCH V2 2/2] riscv: Change code model of module to medany to improve data accessing Date: Fri, 21 Feb 2020 10:47:55 +0800 Message-Id: <1582253275-28181-3-git-send-email-vincent.chen@sifive.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1582253275-28181-1-git-send-email-vincent.chen@sifive.com> References: <1582253275-28181-1-git-send-email-vincent.chen@sifive.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200220_184846_511817_31604970 X-CRM114-Status: GOOD ( 10.81 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Vincent Chen , linux-riscv@lists.infradead.org, deanbo422@gmail.com Sender: "linux-riscv" Errors-To: linux-riscv-bounces+infradead-linux-riscv=archiver.kernel.org@lists.infradead.org All the loaded module locates in the region [＆_end-2G，VMALLOC_END] at runtime, so the distance from the module start to the end of the kernel image does not exceed 2GB. Hence, the code model of the kernel module can be changed to medany to improve the performance data access. Signed-off-by: Vincent Chen --- arch/riscv/Makefile | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/arch/riscv/Makefile b/arch/riscv/Makefile index 33a1d7cbf775..a6abe5847e42 100644 --- a/arch/riscv/Makefile +++ b/arch/riscv/Makefile @@ -13,8 +13,10 @@ LDFLAGS_vmlinux := ifeq ($(CONFIG_DYNAMIC_FTRACE),y) LDFLAGS_vmlinux := --no-relax endif -KBUILD_AFLAGS_MODULE += -fPIC -KBUILD_CFLAGS_MODULE += -fPIC + +ifeq ($(CONFIG_64BIT)$(CONFIG_CMODEL_MEDLOW),yy) +KBUILD_CFLAGS_MODULE += -mcmodel=medany +endif export BITS ifeq ($(CONFIG_ARCH_RV64I),y) -- 2.7.4