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[59.124.168.89]) by smtp.gmail.com with ESMTPSA id b5sm3108466pfr.26.2021.09.08.10.45.59 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 08 Sep 2021 10:46:00 -0700 (PDT) From: Greentime Hu To: linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, aou@eecs.berkeley.edu, palmer@dabbelt.com, paul.walmsley@sifive.com, vincent.chen@sifive.com Subject: [RFC PATCH v8 16/21] riscv: Initialize vector registers with proper vsetvli then it can work normally Date: Thu, 9 Sep 2021 01:45:28 +0800 Message-Id: <5589514eb2d20504725821807800b5bbccf36fe6.1631121222.git.greentime.hu@sifive.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org It may cause an illegal instruction exception if it doesn't use vsetvli before vmv.v.i v0, 0. Co-developed-by: Han-Kuan Chen Signed-off-by: Han-Kuan Chen Signed-off-by: Greentime Hu --- arch/riscv/kernel/head.S | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/riscv/kernel/head.S b/arch/riscv/kernel/head.S index cf331f138142..42eb3203fa77 100644 --- a/arch/riscv/kernel/head.S +++ b/arch/riscv/kernel/head.S @@ -442,6 +442,7 @@ ENTRY(reset_regs) li t1, SR_VS csrs CSR_STATUS, t1 + vsetvli t1, x0, e8, m1 vmv.v.i v0, 0 vmv.v.i v1, 0 vmv.v.i v2, 0 -- 2.31.1