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SubjectRe: [PATCH v3 1/2] riscv: cacheinfo: Implement cache_get_priv_group with a generic ops structure
On Mon, Jan 13, 2020 at 12:09 PM Yash Shah <yash.shah@sifive.com> wrote:
>
> Implement cache_get_priv_group() that will make use of a generic ops
> structure to return a private attribute group for custom cache info.
>
> Using riscv_set_cacheinfo_ops() users can hook their own custom function
> to return the private attribute group for cacheinfo. In future we can
> add more ops to this generic ops structure for SOC specific cacheinfo.
>
> Signed-off-by: Yash Shah <yash.shah@sifive.com>
> ---
> arch/riscv/include/asm/cacheinfo.h | 15 +++++++++++++++
> arch/riscv/kernel/cacheinfo.c | 17 +++++++++++++++++
> 2 files changed, 32 insertions(+)
> create mode 100644 arch/riscv/include/asm/cacheinfo.h
>
> diff --git a/arch/riscv/include/asm/cacheinfo.h b/arch/riscv/include/asm/cacheinfo.h
> new file mode 100644
> index 0000000..5d9662e
> --- /dev/null
> +++ b/arch/riscv/include/asm/cacheinfo.h
> @@ -0,0 +1,15 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +
> +#ifndef _ASM_RISCV_CACHEINFO_H
> +#define _ASM_RISCV_CACHEINFO_H
> +
> +#include <linux/cacheinfo.h>
> +
> +struct riscv_cacheinfo_ops {
> + const struct attribute_group * (*get_priv_group)(struct cacheinfo
> + *this_leaf);
> +};
> +
> +void riscv_set_cacheinfo_ops(struct riscv_cacheinfo_ops *ops);
> +
> +#endif /* _ASM_RISCV_CACHEINFO_H */
> diff --git a/arch/riscv/kernel/cacheinfo.c b/arch/riscv/kernel/cacheinfo.c
> index 4c90c07..bd0f122 100644
> --- a/arch/riscv/kernel/cacheinfo.c
> +++ b/arch/riscv/kernel/cacheinfo.c
> @@ -7,6 +7,23 @@
> #include <linux/cpu.h>
> #include <linux/of.h>
> #include <linux/of_device.h>
> +#include <asm/cacheinfo.h>
> +
> +static struct riscv_cacheinfo_ops *rv_cache_ops;
> +
> +void riscv_set_cacheinfo_ops(struct riscv_cacheinfo_ops *ops)
> +{
> + rv_cache_ops = ops;
> +}
> +EXPORT_SYMBOL_GPL(riscv_set_cacheinfo_ops);
> +
> +const struct attribute_group *
> +cache_get_priv_group(struct cacheinfo *this_leaf)
> +{
> + if (rv_cache_ops && rv_cache_ops->get_priv_group)
> + return rv_cache_ops->get_priv_group(this_leaf);
> + return NULL;
> +}
>
> static void ci_leaf_init(struct cacheinfo *this_leaf,
> struct device_node *node,
> --
> 2.7.4
>

LGTM.

Reviewed-by: Anup Patel <anup@brainfault.org>

Regards,
Anup

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