Re: [PATCH v8 27/40] x86/boot: Add Confidential Computing type to setup_data

Dave Hansen
2021-12-10T19:17:55Z

On 12/10/21 7:43 AM, Brijesh Singh wrote:
> +/* AMD SEV Confidential computing blob structure */
> +#define CC_BLOB_SEV_HDR_MAGIC 0x45444d41
> +struct cc_blob_sev_info {
> + u32 magic;
> + u16 version;
> + u16 reserved;
> + u64 secrets_phys;
> + u32 secrets_len;
> + u64 cpuid_phys;
> + u32 cpuid_len;
> +};

This is an ABI structure rather than some purely kernel construct, right?

I searched through all of the specs to which you linked in the cover
letter. I looked for "blob", "guid", the magic and part of the GUID
itself trying to find where this is defined to see if the struct is correct.

I couldn't find anything.

Where is the spec for this blob? How large is it? Did you mean to
leave a 4-byte hole after secrets_len and before cpuid_phys?