riscv: Introduce riscv_v_vsize to record size of Vector context

[platform/kernel/linux-starfive.git] / arch / riscv / include / asm / vector.h

diff --git a/arch/riscv/include/asm/vector.h b/arch/riscv/include/asm/vector.h
index 51bb372..df3b5ca 100644 (file)
--- a/arch/riscv/include/asm/vector.h
+++ b/arch/riscv/include/asm/vector.h
@@ -7,12 +7,16 @@
 #define __ASM_RISCV_VECTOR_H
 
 #include <linux/types.h>
+#include <uapi/asm-generic/errno.h>
 
 #ifdef CONFIG_RISCV_ISA_V
 
 #include <asm/hwcap.h>
 #include <asm/csr.h>
 
+extern unsigned long riscv_v_vsize;
+int riscv_v_setup_vsize(void);
+
 static __always_inline bool has_vector(void)
 {
        return riscv_has_extension_unlikely(RISCV_ISA_EXT_v);
@@ -30,7 +34,11 @@ static __always_inline void riscv_v_disable(void)
 
 #else /* ! CONFIG_RISCV_ISA_V  */
 
+struct pt_regs;
+
+static inline int riscv_v_setup_vsize(void) { return -EOPNOTSUPP; }
 static __always_inline bool has_vector(void) { return false; }
+#define riscv_v_vsize (0)
 
 #endif /* CONFIG_RISCV_ISA_V */