lkml.org 
[lkml]   [2022]   [Jun]   [21]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRE: [PATCH Part2 v6 06/49] x86/sev: Add helper functions for RMPUPDATE and PSMASH instruction
Date
[AMD Official Use Only - General]

Hello Dave,

>> /*
>> * The RMP entry format is not architectural. The format is defined
>> in PPR @@ -126,6 +128,15 @@ struct snp_guest_platform_data {
>> u64 secrets_gpa;
>> };
>>
>> +struct rmpupdate {
>> + u64 gpa;
>> + u8 assigned;
>> + u8 pagesize;
>> + u8 immutable;
>> + u8 rsvd;
>> + u32 asid;
>> +} __packed;

>I see above it says the RMP entry format isn't architectural; is this 'rmpupdate' structure? If not how is this going to get handled when we have a couple of SNP capable CPUs with different layouts?

Architectural implies that it is defined in the APM and shouldn't change in such a way as to not be backward compatible.
I probably think the wording here should be architecture independent or more precisely platform independent.

Thanks,
Ashish

\
 
 \ /
  Last update: 2022-06-21 19:40    [W:0.302 / U:0.180 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site