linux-kernel - Re: [PATCH v4 2/6] configfs-tsm: Introduce a shared ABI for attestation reports

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Date:   Tue, 26 Sep 2023 20:17:29 -0700
From:   Dan Williams <dan.j.williams@...el.com>
To:     Kuppuswamy Sathyanarayanan 
        <sathyanarayanan.kuppuswamy@...ux.intel.com>,
        Dan Williams <dan.j.williams@...el.com>,
        <linux-coco@...ts.linux.dev>
CC:     Dionna Amalie Glaze <dionnaglaze@...gle.com>,
        James Bottomley <James.Bottomley@...senpartnership.com>,
        Peter Gonda <pgonda@...gle.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Samuel Ortiz <sameo@...osinc.com>,
        Thomas Gleixner <tglx@...utronix.de>, <peterz@...radead.org>,
        <linux-kernel@...r.kernel.org>, <x86@...nel.org>,
        <dave.hansen@...ux.intel.com>
Subject: Re: [PATCH v4 2/6] configfs-tsm: Introduce a shared ABI for
 attestation reports

Kuppuswamy Sathyanarayanan wrote:
[..]
> >>> +/**
> >>> + * struct tsm_desc - option descriptor for generating tsm report blobs
> >>> + * @privlevel: optional privilege level to associate with @outblob
> >>> + * @inblob_len: sizeof @inblob
> >>> + * @inblob: arbitrary input data
> >>> + */
> >>> +struct tsm_desc {
> >>> +	unsigned int privlevel;
> >>> +	size_t inblob_len;
> >>> +	u8 inblob[TSM_INBLOB_MAX];
> >>> +};
> >>> +
> >>> +/**
> >>> + * struct tsm_report - track state of report generation relative to options
> >>> + * @desc: report generation options / cached report state
> >>> + * @outblob: generated evidence to provider to the attestation agent
> >>> + * @outblob_len: sizeof(outblob)
> >>
> >> I think following is incorrect. You might want to add info about certs_len
> >> and certs.
> > 
> > Yeah, missed updating this with certs addition. The outblob_len
> > definition is correct, or do you mean the kdoc is out of order with
> > respect to the struct?
> 
> No, I am talking about the write_generation, read_generation and cfg options.
> They are part of struct tsm_report_state, so why document it here?

Ah yup, will fix.