linux-kernel - [RFC PATCH V3 06/11] riscv: Add has

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Date:   Sun,  8 Mar 2020 17:49:49 +0800
From:   guoren@...nel.org
To:     paul.walmsley@...ive.com, palmer@...belt.com, Anup.Patel@....com,
        greentime.hu@...ive.com
Cc:     linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org,
        arnd@...db.de, linux-csky@...r.kernel.org,
        linux-riscv@...ts.infradead.org,
        Guo Ren <guoren@...ux.alibaba.com>,
        Dave Martin <Dave.Martin@....com>
Subject: [RFC PATCH V3 06/11] riscv: Add has_vector detect

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

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

Signed-off-by: Guo Ren <guoren@...ux.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