[PATCH v14 1/3] riscv: mm: modify pte format for Svnapot

[Conor Dooley]

On Wed, Mar 08, 2023 at 03:48:51PM +0800, Qinglin Pan wrote:
> From: Qinglin Pan <panqinglin2020 at iscas.ac.cn>
> 
> Add one alternative to enable/disable svnapot support, enable this static
> key when "svnapot" is in the "riscv,isa" field of fdt and SVNAPOT compile
> option is set. It will influence the behavior of has_svnapot. All code
> dependent on svnapot should make sure that has_svnapot return true firstly.
> 
> Modify PTE definition for Svnapot, and creates some functions in pgtable.h
> to mark a PTE as napot and check if it is a Svnapot PTE. Until now, only
> 64KB napot size is supported in spec, so some macros has only 64KB version.
> 
> Signed-off-by: Qinglin Pan <panqinglin00 at gmail.com>
> Reviewed-by: Andrew Jones <ajones at ventanamicro.com>
> diff --git a/arch/riscv/include/asm/hwcap.h b/arch/riscv/include/asm/hwcap.h
> index e3021b2590de..ba9f4650f051 100644
> --- a/arch/riscv/include/asm/hwcap.h
> +++ b/arch/riscv/include/asm/hwcap.h
> @@ -42,9 +42,10 @@
>  #define RISCV_ISA_EXT_ZBB		30
>  #define RISCV_ISA_EXT_ZICBOM		31
>  #define RISCV_ISA_EXT_ZIHINTPAUSE	32
> +#define RISCV_ISA_EXT_SVNAPOT		33
>  
>  #define RISCV_ISA_EXT_MAX		64

> -#define RISCV_ISA_EXT_NAME_LEN_MAX	32
> +#define RISCV_ISA_EXT_NAME_LEN_MAX	33

I think this change is not needed.
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