linux-kernel - RE: [PATCH Part2 v6 13/49] crypto:ccp: Provide APIs to issue SEV-SNP commands

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Message-ID: <BYAPR12MB2759F72D5FB87F1B552BBF4E8EB29@BYAPR12MB2759.namprd12.prod.outlook.com>
Date:   Wed, 22 Jun 2022 01:44:34 +0000
From:   "Kalra, Ashish" <Ashish.Kalra@....com>
To:     Peter Gonda <pgonda@...gle.com>
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Subject: RE: [PATCH Part2 v6 13/49] crypto:ccp: Provide APIs to issue SEV-SNP
 commands

[Public]

>> +EXPORT_SYMBOL_GPL(snp_guest_decommission);
>> +
>> +int snp_guest_df_flush(int *error)
>> +{
>> +       return sev_do_cmd(SEV_CMD_SNP_DF_FLUSH, NULL, error); } 
>> +EXPORT_SYMBOL_GPL(snp_guest_df_flush);

>Why not instead change sev_guest_df_flush() to be SNP aware? That way callers get the right behavior without having to know if SNP is enabled or not.

It can be done, and actually both DF_FLUSH  commands do exactly the same thing.

But as with other API interfaces here, I think it is better to differentiate between snp and sev API interfaces and the callers be aware of which
interface they are invoking.

Thanks,
Ashish