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From:   guoren@kernel.org
To:     paul.walmsley@sifive.com, palmer@dabbelt.com, Anup.Patel@wdc.com,
        greentime.hu@sifive.com
Cc:     linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org,
        arnd@arndb.de, linux-csky@vger.kernel.org,
        linux-riscv@lists.infradead.org,
        Guo Ren <guoren@linux.alibaba.com>,
        Dave Martin <Dave.Martin@arm.com>
Subject: [RFC PATCH V3 06/11] riscv: Add has_vector detect
Date:   Sun,  8 Mar 2020 17:49:49 +0800
Message-Id: <20200308094954.13258-7-guoren@kernel.org>
In-Reply-To: <20200308094954.13258-1-guoren@kernel.org>
References: <20200308094954.13258-1-guoren@kernel.org>
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

From: Guo Ren <guoren@linux.alibaba.com>

This patch is to detect "has_vector" at time of CPU feature
parsing.

Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
---
 arch/riscv/kernel/cpufeature.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/arch/riscv/kernel/cpufeature.c b/arch/riscv/kernel/cpufeature.c
index c8527d770c98..c9ab24e3c79e 100644
--- a/arch/riscv/kernel/cpufeature.c
+++ b/arch/riscv/kernel/cpufeature.c
@@ -16,6 +16,9 @@ unsigned long elf_hwcap __read_mostly;
 #ifdef CONFIG_FPU
 bool has_fpu __read_mostly;
 #endif
+#ifdef CONFIG_VECTOR
+bool has_vector __read_mostly;
+#endif
 
 void riscv_fill_hwcap(void)
 {
@@ -73,4 +76,9 @@ void riscv_fill_hwcap(void)
 	if (elf_hwcap & (COMPAT_HWCAP_ISA_F | COMPAT_HWCAP_ISA_D))
 		has_fpu = true;
 #endif
+
+#ifdef CONFIG_VECTOR
+	if (elf_hwcap & COMPAT_HWCAP_ISA_V)
+		has_vector = true;
+#endif
 }
-- 
2.17.0