Commit 6cfc6245 authored by Andrew Jones's avatar Andrew Jones Committed by Anup Patel
Browse files

RISC-V: Add SBI STA extension definitions 



The SBI STA extension enables steal-time accounting. Add the
definitions it specifies.

Acked-by: default avatarPalmer Dabbelt <palmer@rivosinc.com>
Reviewed-by: default avatarConor Dooley <conor.dooley@microchip.com>
Reviewed-by: default avatarAnup Patel <anup@brainfault.org>
Reviewed-by: default avatarAtish Patra <atishp@rivosinc.com>
Signed-off-by: default avatarAndrew Jones <ajones@ventanamicro.com>
Signed-off-by: default avatarAnup Patel <anup@brainfault.org>
parent 323925ed

arch/riscv/include/asm/sbi.h

+17 −0
Original line number Diff line number Diff line
@@ -31,6 +31,7 @@ enum sbi_ext_id { 
	SBI_EXT_SRST = 0x53525354,

	SBI_EXT_PMU = 0x504D55,

	SBI_EXT_DBCN = 0x4442434E,

	SBI_EXT_STA = 0x535441,



	/* Experimentals extensions must lie within this range */

	SBI_EXT_EXPERIMENTAL_START = 0x08000000,
@@ -243,6 +244,22 @@ enum sbi_ext_dbcn_fid { 
	SBI_EXT_DBCN_CONSOLE_WRITE_BYTE = 2,

};



/* SBI STA (steal-time accounting) extension */

enum sbi_ext_sta_fid {

	SBI_EXT_STA_STEAL_TIME_SET_SHMEM = 0,

};



struct sbi_sta_struct {

	__le32 sequence;

	__le32 flags;

	__le64 steal;

	u8 preempted;

	u8 pad[47];

} __packed;



#define SBI_STA_SHMEM_DISABLE		-1



/* SBI spec version fields */

#define SBI_SPEC_VERSION_DEFAULT	0x1

#define SBI_SPEC_VERSION_MAJOR_SHIFT	24

#define SBI_SPEC_VERSION_MAJOR_MASK	0x7f