diff mbox series

[RFC,V3,06/11] riscv: Add has_vector detect

Message ID 20200308094954.13258-7-guoren@kernel.org (mailing list archive)
State New, archived
Headers show
Series riscv: Add vector ISA support | expand

Commit Message

Guo Ren March 8, 2020, 9:49 a.m. UTC 
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(+)
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Patch

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
 }