Commit 122979aa authored by Mayuresh Chitale's avatar Mayuresh Chitale Committed by Anup Patel
Browse files

RISC-V: Probe Svinval extension form ISA string 



Just like other ISA extensions, we allow callers/users to detect the
presence of Svinval extension from ISA string.

Signed-off-by: default avatarMayuresh Chitale <mchitale@ventanamicro.com>
Signed-off-by: default avatarAnup Patel <apatel@ventanamicro.com>
Reviewed-by: default avatarAndrew Jones <ajones@ventanamicro.com>
Signed-off-by: default avatarAnup Patel <anup@brainfault.org>
parent d837f191

arch/riscv/include/asm/hwcap.h

+4 −0
Original line number Diff line number Diff line
@@ -58,6 +58,7 @@ enum riscv_isa_ext_id { 
	RISCV_ISA_EXT_ZICBOM,

	RISCV_ISA_EXT_ZIHINTPAUSE,

	RISCV_ISA_EXT_SSTC,

	RISCV_ISA_EXT_SVINVAL,

	RISCV_ISA_EXT_ID_MAX = RISCV_ISA_EXT_MAX,

};
@@ -69,6 +70,7 @@ enum riscv_isa_ext_id { 
enum riscv_isa_ext_key {

	RISCV_ISA_EXT_KEY_FPU,		/* For 'F' and 'D' */

	RISCV_ISA_EXT_KEY_ZIHINTPAUSE,

	RISCV_ISA_EXT_KEY_SVINVAL,

	RISCV_ISA_EXT_KEY_MAX,

};
@@ -90,6 +92,8 @@ static __always_inline int riscv_isa_ext2key(int num) 
		return RISCV_ISA_EXT_KEY_FPU;

	case RISCV_ISA_EXT_ZIHINTPAUSE:

		return RISCV_ISA_EXT_KEY_ZIHINTPAUSE;

	case RISCV_ISA_EXT_SVINVAL:

		return RISCV_ISA_EXT_KEY_SVINVAL;

	default:

		return -EINVAL;

	}

arch/riscv/kernel/cpu.c

+1 −0
Original line number Diff line number Diff line
@@ -96,6 +96,7 @@ static struct riscv_isa_ext_data isa_ext_arr[] = { 
	__RISCV_ISA_EXT_DATA(zicbom, RISCV_ISA_EXT_ZICBOM),

	__RISCV_ISA_EXT_DATA(zihintpause, RISCV_ISA_EXT_ZIHINTPAUSE),

	__RISCV_ISA_EXT_DATA(sstc, RISCV_ISA_EXT_SSTC),

	__RISCV_ISA_EXT_DATA(svinval, RISCV_ISA_EXT_SVINVAL),

	__RISCV_ISA_EXT_DATA("", RISCV_ISA_EXT_MAX),

};

arch/riscv/kernel/cpufeature.c

+1 −0
Original line number Diff line number Diff line
@@ -204,6 +204,7 @@ void __init riscv_fill_hwcap(void) 
				SET_ISA_EXT_MAP("zicbom", RISCV_ISA_EXT_ZICBOM);

				SET_ISA_EXT_MAP("zihintpause", RISCV_ISA_EXT_ZIHINTPAUSE);

				SET_ISA_EXT_MAP("sstc", RISCV_ISA_EXT_SSTC);

				SET_ISA_EXT_MAP("svinval", RISCV_ISA_EXT_SVINVAL);

			}

#undef SET_ISA_EXT_MAP

		}