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RISC-V: Add SBI STA extension definitions

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

Acked-by: Palmer Dabbelt <palmer@rivosinc.com>
Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
Signed-off-by: Andrew Jones <ajones@ventanamicro.com>
Signed-off-by: Anup Patel <anup@brainfault.org>
This commit is contained in:
Andrew Jones 2023-12-20 17:00:15 +01:00 committed by Anup Patel
parent 323925ed6d
commit 6cfc624576
1 changed files with 17 additions and 0 deletions
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17
arch/riscv/include/asm/sbi.h
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@ -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