Re: [PATCH RFC 2/6] riscv: perf: Add Control transfer records CSR definations.

[Conor Dooley <conor@kernel.org>]

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On Wed, May 29, 2024 at 07:53:33PM +0100, Rajnesh Kanwal wrote:
> Adding CSR defines for RISCV Control Transfer Records extension [0]
> along with bit-field macros for each CSR.
> 
> [0]: https://github.com/riscv/riscv-control-transfer-records
> 
> Signed-off-by: Rajnesh Kanwal <rkanwal@rivosinc.com>
> ---
>  arch/riscv/include/asm/csr.h | 83 ++++++++++++++++++++++++++++++++++++

This patch isn't for perf, so $subject is a bit misleading.

Thanks,
Conor.

>  1 file changed, 83 insertions(+)
> 
> diff --git a/arch/riscv/include/asm/csr.h b/arch/riscv/include/asm/csr.h
> index 701963b64fc4..a80a2ee9d44e 100644
> --- a/arch/riscv/include/asm/csr.h
> +++ b/arch/riscv/include/asm/csr.h
> @@ -309,6 +309,85 @@
>  
>  #define CSR_SSCOUNTOVF		0xda0
>  
> +/* M-mode Control Transfer Records CSRs */
> +#define CSR_MCTRCTL		0x34e
> +
> +/* S-mode Control Transfer Records CSRs */
> +#define CSR_SCTRCTL		0x14e
> +#define CSR_SCTRSTATUS		0x14f
> +#define CSR_SCTRDEPTH		0x15f
> +
> +/* VS-mode Control Transfer Records CSRs */
> +#define CSR_VSCTRCTL		0x24e
> +
> +/* xctrtl CSR bits. */
> +#define CTRCTL_U_ENABLE		_AC(0x1, UL)
> +#define CTRCTL_S_ENABLE		_AC(0x2, UL)
> +#define CTRCTL_M_ENABLE		_AC(0x4, UL)
> +#define CTRCTL_RASEMU		_AC(0x80, UL)
> +#define CTRCTL_STE		_AC(0x100, UL)
> +#define CTRCTL_MTE		_AC(0x200, UL)
> +#define CTRCTL_BPFRZ		_AC(0x800, UL)
> +#define CTRCTL_LCOFIFRZ		_AC(0x1000, UL)
> +#define CTRCTL_EXCINH		_AC(0x200000000, UL)
> +#define CTRCTL_INTRINH		_AC(0x400000000, UL)
> +#define CTRCTL_TRETINH		_AC(0x800000000, UL)
> +#define CTRCTL_NTBREN		_AC(0x1000000000, UL)
> +#define CTRCTL_TKBRINH		_AC(0x2000000000, UL)
> +#define CTRCTL_INDCALL_INH	_AC(0x10000000000, UL)
> +#define CTRCTL_DIRCALL_INH	_AC(0x20000000000, UL)
> +#define CTRCTL_INDJUMP_INH	_AC(0x40000000000, UL)
> +#define CTRCTL_DIRJUMP_INH	_AC(0x80000000000, UL)
> +#define CTRCTL_CORSWAP_INH	_AC(0x100000000000, UL)
> +#define CTRCTL_RET_INH		_AC(0x200000000000, UL)
> +#define CTRCTL_INDOJUMP_INH	_AC(0x400000000000, UL)
> +#define CTRCTL_DIROJUMP_INH	_AC(0x800000000000, UL)
> +
> +/* sctrstatus CSR bits. */
> +#define SCTRSTATUS_WRPTR_MASK	0xFF
> +#define SCTRSTATUS_FROZEN	_AC(0x80000000, UL)
> +
> +#ifdef CONFIG_RISCV_M_MODE
> +#define CTRCTL_KERNEL_ENABLE	CTRCTL_M_ENABLE
> +#else
> +#define CTRCTL_KERNEL_ENABLE	CTRCTL_S_ENABLE
> +#endif
> +
> +/* sctrdepth CSR bits. */
> +#define SCTRDEPTH_MASK		0x7
> +
> +#define SCTRDEPTH_MIN		0x0 /* 16 Entries. */
> +#define SCTRDEPTH_MAX		0x4 /* 256 Entries. */
> +
> +/* ctrsource, ctrtarget and ctrdata CSR bits. */
> +#define CTRSOURCE_VALID		0x1ULL
> +#define CTRTARGET_MISP		0x1ULL
> +
> +#define CTRDATA_TYPE_MASK	0xF
> +#define CTRDATA_CCV		0x8000
> +#define CTRDATA_CCM_MASK	0xFFF0000
> +#define CTRDATA_CCE_MASK	0xF0000000
> +
> +#define CTRDATA_TYPE_NONE			0
> +#define CTRDATA_TYPE_EXCEPTION			1
> +#define CTRDATA_TYPE_INTERRUPT			2
> +#define CTRDATA_TYPE_TRAP_RET			3
> +#define CTRDATA_TYPE_NONTAKEN_BRANCH		4
> +#define CTRDATA_TYPE_TAKEN_BRANCH		5
> +#define CTRDATA_TYPE_RESERVED_6			6
> +#define CTRDATA_TYPE_RESERVED_7			7
> +#define CTRDATA_TYPE_INDIRECT_CALL		8
> +#define CTRDATA_TYPE_DIRECT_CALL		9
> +#define CTRDATA_TYPE_INDIRECT_JUMP		10
> +#define CTRDATA_TYPE_DIRECT_JUMP		11
> +#define CTRDATA_TYPE_CO_ROUTINE_SWAP		12
> +#define CTRDATA_TYPE_RETURN			13
> +#define CTRDATA_TYPE_OTHER_INDIRECT_JUMP	14
> +#define CTRDATA_TYPE_OTHER_DIRECT_JUMP		15
> +
> +#define CTR_ENTRIES_FIRST	0x200
> +#define CTR_ENTRIES_LAST	0x2ff
> +
>  #define CSR_SSTATUS		0x100
>  #define CSR_SIE			0x104
>  #define CSR_STVEC		0x105
> @@ -490,6 +569,8 @@
>  # define CSR_TOPEI	CSR_MTOPEI
>  # define CSR_TOPI	CSR_MTOPI
>  
> +# define CSR_CTRCTL     CSR_MCTRCTL
> +
>  # define SR_IE		SR_MIE
>  # define SR_PIE		SR_MPIE
>  # define SR_PP		SR_MPP
> @@ -520,6 +601,8 @@
>  # define CSR_TOPEI	CSR_STOPEI
>  # define CSR_TOPI	CSR_STOPI
>  
> +# define CSR_CTRCTL     CSR_SCTRCTL
> +
>  # define SR_IE		SR_SIE
>  # define SR_PIE		SR_SPIE
>  # define SR_PP		SR_SPP
> -- 
> 2.34.1
> 

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