Unverified Commit c6699baf authored by Evan Green's avatar Evan Green Committed by Palmer Dabbelt
Browse files

RISC-V: Add Zba, Zbs extension probing 



Add the Zba address bit manipulation extension and Zbs single bit
instructions extension into those the kernel is aware of and maintains
in its riscv_isa bitmap.

Signed-off-by: default avatarEvan Green <evan@rivosinc.com>
Reviewed-by: default avatarAndrew Jones <ajones@ventanamicro.com>
Reviewed-by: default avatarPalmer Dabbelt <palmer@rivosinc.com>
Reviewed-by: default avatarConor Dooley <conor.dooley@microchip.com>
Reviewed-by: default avatarHeiko Stuebner <heiko.stuebner@vrull.eu>
Link: https://lore.kernel.org/r/20230509182504.2997252-2-evan@rivosinc.com


Signed-off-by: default avatarPalmer Dabbelt <palmer@rivosinc.com>
parent ac9a7868

arch/riscv/include/asm/hwcap.h

+2 −0
Original line number Diff line number Diff line
@@ -46,6 +46,8 @@ 
#define RISCV_ISA_EXT_ZICBOZ		34

#define RISCV_ISA_EXT_SMAIA		35

#define RISCV_ISA_EXT_SSAIA		36

#define RISCV_ISA_EXT_ZBA		37

#define RISCV_ISA_EXT_ZBS		38



#define RISCV_ISA_EXT_MAX		64

#define RISCV_ISA_EXT_NAME_LEN_MAX	32

arch/riscv/kernel/cpu.c

+2 −0
Original line number Diff line number Diff line
@@ -184,7 +184,9 @@ static struct riscv_isa_ext_data isa_ext_arr[] = { 
	__RISCV_ISA_EXT_DATA(zicbom, RISCV_ISA_EXT_ZICBOM),

	__RISCV_ISA_EXT_DATA(zicboz, RISCV_ISA_EXT_ZICBOZ),

	__RISCV_ISA_EXT_DATA(zihintpause, RISCV_ISA_EXT_ZIHINTPAUSE),

	__RISCV_ISA_EXT_DATA(zba, RISCV_ISA_EXT_ZBA),

	__RISCV_ISA_EXT_DATA(zbb, RISCV_ISA_EXT_ZBB),

	__RISCV_ISA_EXT_DATA(zbs, RISCV_ISA_EXT_ZBS),

	__RISCV_ISA_EXT_DATA(smaia, RISCV_ISA_EXT_SMAIA),

	__RISCV_ISA_EXT_DATA(ssaia, RISCV_ISA_EXT_SSAIA),

	__RISCV_ISA_EXT_DATA(sscofpmf, RISCV_ISA_EXT_SSCOFPMF),

arch/riscv/kernel/cpufeature.c

+2 −0
Original line number Diff line number Diff line
@@ -236,7 +236,9 @@ void __init riscv_fill_hwcap(void) 
				SET_ISA_EXT_MAP("svinval", RISCV_ISA_EXT_SVINVAL);

				SET_ISA_EXT_MAP("svnapot", RISCV_ISA_EXT_SVNAPOT);

				SET_ISA_EXT_MAP("svpbmt", RISCV_ISA_EXT_SVPBMT);

				SET_ISA_EXT_MAP("zba", RISCV_ISA_EXT_ZBA);

				SET_ISA_EXT_MAP("zbb", RISCV_ISA_EXT_ZBB);

				SET_ISA_EXT_MAP("zbs", RISCV_ISA_EXT_ZBS);

				SET_ISA_EXT_MAP("zicbom", RISCV_ISA_EXT_ZICBOM);

				SET_ISA_EXT_MAP("zicboz", RISCV_ISA_EXT_ZICBOZ);

				SET_ISA_EXT_MAP("zihintpause", RISCV_ISA_EXT_ZIHINTPAUSE);