linux-kernel - Re: [PATCH v9 04/17] riscv: Add new csr defines related to vector extension

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Date:   Tue, 14 Dec 2021 08:29:23 -0800 (PST)
From:   Palmer Dabbelt <palmer@...belt.com>
To:     greentime.hu@...ive.com
CC:     Paul Walmsley <paul.walmsley@...ive.com>,
        linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org,
        aou@...s.berkeley.edu
Subject:     Re: [PATCH v9 04/17] riscv: Add new csr defines related to vector extension

On Tue, 09 Nov 2021 01:48:16 PST (-0800), greentime.hu@...ive.com wrote:
> Follow the riscv vector spec to add new csr numbers.
>
> [guoren@...ux.alibaba.com: first porting for new vector related csr]
> Signed-off-by: Greentime Hu <greentime.hu@...ive.com>
> Acked-by: Guo Ren <guoren@...nel.org>
> Co-developed-by: Guo Ren <guoren@...ux.alibaba.com>
> Signed-off-by: Guo Ren <guoren@...ux.alibaba.com>
> Co-developed-by: Vincent Chen <vincent.chen@...ive.com>
> Signed-off-by: Vincent Chen <vincent.chen@...ive.com>
> ---
>  arch/riscv/include/asm/csr.h | 16 ++++++++++++++--
>  1 file changed, 14 insertions(+), 2 deletions(-)
>
> diff --git a/arch/riscv/include/asm/csr.h b/arch/riscv/include/asm/csr.h
> index 87ac65696871..069743102fac 100644
> --- a/arch/riscv/include/asm/csr.h
> +++ b/arch/riscv/include/asm/csr.h
> @@ -24,6 +24,12 @@
>  #define SR_FS_CLEAN	_AC(0x00004000, UL)
>  #define SR_FS_DIRTY	_AC(0x00006000, UL)
>
> +#define SR_VS           _AC(0x00000600, UL) /* Vector Status */
> +#define SR_VS_OFF       _AC(0x00000000, UL)
> +#define SR_VS_INITIAL   _AC(0x00000200, UL)
> +#define SR_VS_CLEAN     _AC(0x00000400, UL)
> +#define SR_VS_DIRTY     _AC(0x00000600, UL)
> +
>  #define SR_XS		_AC(0x00018000, UL) /* Extension Status */
>  #define SR_XS_OFF	_AC(0x00000000, UL)
>  #define SR_XS_INITIAL	_AC(0x00008000, UL)
> @@ -31,9 +37,9 @@
>  #define SR_XS_DIRTY	_AC(0x00018000, UL)
>
>  #ifndef CONFIG_64BIT
> -#define SR_SD		_AC(0x80000000, UL) /* FS/XS dirty */
> +#define SR_SD		_AC(0x80000000, UL) /* FS/VS/XS dirty */
>  #else
> -#define SR_SD		_AC(0x8000000000000000, UL) /* FS/XS dirty */
> +#define SR_SD		_AC(0x8000000000000000, UL) /* FS/VS/XS dirty */
>  #endif
>
>  /* SATP flags */
> @@ -120,6 +126,12 @@
>  #define CSR_MIMPID		0xf13
>  #define CSR_MHARTID		0xf14
>
> +#define CSR_VSTART		0x8
> +#define CSR_VCSR		0xf
> +#define CSR_VL			0xc20
> +#define CSR_VTYPE		0xc21
> +#define CSR_VLENB		0xc22
> +
>  #ifdef CONFIG_RISCV_M_MODE
>  # define CSR_STATUS	CSR_MSTATUS
>  # define CSR_IE		CSR_MIE

Reviewed-by: Palmer Dabbelt <palmer@...osinc.com>