[PATCH 1/2] riscv: provide missing base extension functions

[Sean Anderson]

On 7/19/21 4:28 PM, Heinrich Schuchardt wrote:
> Provide library functions to read:
> 
> * SBI implementation version
> * machine vendor ID
> * machine architecture ID
> * machine implementation ID
> 
> Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt at canonical.com>
> ---
>   arch/riscv/include/asm/sbi.h |  4 ++
>   arch/riscv/lib/sbi.c         | 71 ++++++++++++++++++++++++++++++++++++
>   2 files changed, 75 insertions(+)
> 
> diff --git a/arch/riscv/include/asm/sbi.h b/arch/riscv/include/asm/sbi.h
> index 53ca316180..262cc9228c 100644
> --- a/arch/riscv/include/asm/sbi.h
> +++ b/arch/riscv/include/asm/sbi.h
> @@ -117,6 +117,10 @@ void sbi_remote_sfence_vma_asid(const unsigned long *hart_mask,
>   void sbi_set_timer(uint64_t stime_value);
>   long sbi_get_spec_version(void);
>   int sbi_get_impl_id(void);
> +long sbi_get_impl_version(void);
>   int sbi_probe_extension(int ext);
> +long sbi_get_mvendorid(void);
> +long sbi_get_marchid(void);
> +long sbi_get_mimpid(void);
> 
>   #endif
> diff --git a/arch/riscv/lib/sbi.c b/arch/riscv/lib/sbi.c
> index 77845a73ca..8b8b4b278f 100644
> --- a/arch/riscv/lib/sbi.c
> +++ b/arch/riscv/lib/sbi.c
> @@ -89,6 +89,23 @@ int sbi_get_impl_id(void)
>   	return -ENOTSUPP;
>   }
> 
> +/**
> + * sbi_get_impl_version() - get SBI implementation version
> + *
> + * Return: implementation version
> + */
> +long sbi_get_impl_version(void)
> +{
> +	struct sbiret ret;
> +
> +	ret = sbi_ecall(SBI_EXT_BASE, SBI_EXT_BASE_GET_IMP_VERSION,
> +			0, 0, 0, 0, 0, 0);
> +	if (!ret.error)
> +		return ret.value;
> +
> +	return -ENOTSUPP;
> +}
> +
>   /**
>    * sbi_probe_extension() - Check if an SBI extension ID is supported or not.
>    * @extid: The extension ID to be probed.
> @@ -108,6 +125,60 @@ int sbi_probe_extension(int extid)
>   	return -ENOTSUPP;
>   }
> 
> +/**
> + * sbi_get_mvendorid() - get machine vendor ID
> + *
> + * Return: implementation vendor ID
> + */
> +long sbi_get_mvendorid(void)
> +{
> +	struct sbiret ret;
> +
> +	ret = sbi_ecall(SBI_EXT_BASE, SBI_EXT_BASE_GET_MVENDORID,
> +			0, 0, 0, 0, 0, 0);
> +	if (!ret.error)
> +		if (ret.value)
> +			return ret.value;
> +
> +	return -ENOTSUPP;
> +}
> +
> +/**
> + * sbi_get_marchid() - get machine architecture ID
> + *
> + * Return: implementation version
> + */
> +long sbi_get_marchid(void)
> +{
> +	struct sbiret ret;
> +
> +	ret = sbi_ecall(SBI_EXT_BASE, SBI_EXT_BASE_GET_MARCHID,
> +			0, 0, 0, 0, 0, 0);
> +	if (!ret.error)
> +		if (ret.value)
> +			return ret.value;
> +
> +	return -ENOTSUPP;
> +}
> +
> +/**
> + * sbi_get_mimpid() - get machine implementation ID
> + *
> + * Return: machine implementation ID
> + */
> +long sbi_get_mimpid(void)
> +{
> +	struct sbiret ret;
> +
> +	ret = sbi_ecall(SBI_EXT_BASE, SBI_EXT_BASE_GET_MIMPID,
> +			0, 0, 0, 0, 0, 0);
> +	if (!ret.error)
> +		if (ret.value)
> +			return ret.value;
> +
> +	return -ENOTSUPP;
> +}
> +
>   #ifdef CONFIG_SBI_V01
> 
>   /**
> --
> 2.30.2
> 

Reviewed-by: Sean Anderson <seanga2 at gmail.com>