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[114.34.229.221]) by smtp.gmail.com with ESMTPSA id e1sm2196056pfl.162.2020.09.10.01.13.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 10 Sep 2020 01:13:12 -0700 (PDT) From: Greentime Hu To: greentime.hu@sifive.com, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, aou@eecs.berkeley.edu, palmer@dabbelt.com, paul.walmsley@sifive.com Cc: Han-Kuan Chen Subject: [RFC PATCH v7 17/21] riscv: Initialize vector registers with proper vsetvli then it can work normally Date: Thu, 10 Sep 2020 16:12:12 +0800 Message-Id: <3e0097c59860fbaa90aadc69d302fcc2e4ab351e.1599719352.git.greentime.hu@sifive.com> X-Mailer: git-send-email 2.28.0 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org 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. 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 e97c7915ae27..74f2fd8430e0 100644 --- a/arch/riscv/kernel/head.S +++ b/arch/riscv/kernel/head.S @@ -375,6 +375,7 @@ 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 -- 2.28.0