diff mbox series

[v4,02/13] RISC-V: Add SBI STA extension definitions

Message ID 20231220160012.40184-17-ajones@ventanamicro.com (mailing list archive)
State Accepted
Commit 6cfc624576a64145b1d6d3d48de7161a7505f403
Headers show
Series RISC-V: Add steal-time support | expand

Checks

Context Check Description
conchuod/vmtest-fixes-PR fail merge-conflict

Commit Message

Andrew Jones Dec. 20, 2023, 4 p.m. UTC 
The SBI STA extension enables steal-time accounting. Add the
definitions it specifies.

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>
---
 arch/riscv/include/asm/sbi.h | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

Comments

Palmer Dabbelt Dec. 29, 2023, 12:16 a.m. UTC | #1 
On Wed, 20 Dec 2023 08:00:15 PST (-0800), ajones@ventanamicro.com wrote:
> The SBI STA extension enables steal-time accounting. Add the
> definitions it specifies.
>
> 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>
> ---
>  arch/riscv/include/asm/sbi.h | 17 +++++++++++++++++
>  1 file changed, 17 insertions(+)
>
> diff --git a/arch/riscv/include/asm/sbi.h b/arch/riscv/include/asm/sbi.h
> index 0892f4421bc4..b6f898c56940 100644
> --- a/arch/riscv/include/asm/sbi.h
> +++ b/arch/riscv/include/asm/sbi.h
> @@ -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

Acked-by: Palmer Dabbelt <palmer@rivosinc.com>
diff mbox series

Patch

diff --git a/arch/riscv/include/asm/sbi.h b/arch/riscv/include/asm/sbi.h
index 0892f4421bc4..b6f898c56940 100644
--- a/arch/riscv/include/asm/sbi.h
+++ b/arch/riscv/include/asm/sbi.h
@@ -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