linux-kernel - Re: [PATCH v10 12/26] gunyah: vm_mgr: Add/remove user memory regions

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Date:   Fri, 24 Feb 2023 10:36:54 +0000
From:   Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
To:     Elliot Berman <quic_eberman@...cinc.com>,
        Alex Elder <elder@...aro.org>,
        Prakruthi Deepak Heragu <quic_pheragu@...cinc.com>
Cc:     Murali Nalajala <quic_mnalajal@...cinc.com>,
        Trilok Soni <quic_tsoni@...cinc.com>,
        Srivatsa Vaddagiri <quic_svaddagi@...cinc.com>,
        Carl van Schaik <quic_cvanscha@...cinc.com>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Jonathan Corbet <corbet@....net>,
        Bagas Sanjaya <bagasdotme@...il.com>,
        Catalin Marinas <catalin.marinas@....com>,
        Jassi Brar <jassisinghbrar@...il.com>,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-doc@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v10 12/26] gunyah: vm_mgr: Add/remove user memory regions



On 24/02/2023 00:43, Elliot Berman wrote:
>>> +/*
>>> + * ioctls for VM fds
>>> + */
>>> +
>>> +/**
>>> + * struct gh_userspace_memory_region - Userspace memory descripion 
>>> for GH_VM_SET_USER_MEM_REGION
>>> + * @label: Unique identifer to the region.
>>> + * @flags: Flags for memory parcel behavior
>>> + * @guest_phys_addr: Location of the memory region in guest's memory 
>>> space (page-aligned)#
>>
>> Note about overlapping here would be useful.
>>
> 
> I'd like to reduce duplicate documentation where possible. I was 
This is exactly what .rst files can provide.

If you have a proper kernel-doc type documentation in header/source 
files, these can be directly used in .rst files.

The reStructuredText (.rst) files may contain directives to include 
structured documentation comments, or kernel-doc comments, from source 
files.

ex:
.. kernel-doc:: include/linux/gunyah.h
    :internal:


--srini
> generally following this procedure:
>   - include/uapi/linux/gunyah.h docstrings have basic information to 
> remind what the field is
>   - Documentation/virt/gunyah/ documentation explains how to properly 
> use the APIs
> 
> I think it's definitely good idea to have separate documentation beyond 
> what can be described in docstrings here.
> 
> Thanks,
> Elliot