Re: [PATCH v3 2/8] x86/virt/tdx: Remove 'struct field_mapping' and implement TD_SYSINFO_MAP() macro

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Adrian Hunter wrote:
[..]
> Another possibility is to put the macro at the invocation site:
> 
> #define READ_SYS_INFO(_field_id, _member)				\
> 	ret = ret ?: read_sys_metadata_field16(MD_FIELD_ID_##_field_id,	\
> 					       &sysinfo_tdmr->_member)
> 
> 	READ_SYS_INFO(MAX_TDMRS,             max_tdmrs);
> 	READ_SYS_INFO(MAX_RESERVED_PER_TDMR, max_reserved_per_tdmr);
> 	READ_SYS_INFO(PAMT_4K_ENTRY_SIZE,    pamt_entry_size[TDX_PS_4K]);
> 	READ_SYS_INFO(PAMT_2M_ENTRY_SIZE,    pamt_entry_size[TDX_PS_2M]);
> 	READ_SYS_INFO(PAMT_1G_ENTRY_SIZE,    pamt_entry_size[TDX_PS_1G]);
> 
> #undef READ_SYS_INFO
> 
> And so on in later patches:
> 
> #define READ_SYS_INFO(_field_id, _member)				\
> 	ret = ret ?: read_sys_metadata_field(MD_FIELD_ID_##_field_id,	\
> 					     &sysinfo_version->_member)
> 
> 	READ_SYS_INFO(MAJOR_VERSION,    major);
> 	READ_SYS_INFO(MINOR_VERSION,    minor);
> 	READ_SYS_INFO(UPDATE_VERSION,   update);
> 	READ_SYS_INFO(INTERNAL_VERSION, internal);
> 	READ_SYS_INFO(BUILD_NUM,        build_num);
> 	READ_SYS_INFO(BUILD_DATE,       build_date);
> 
> #undef READ_SYS_INFO

Looks like a reasonable enhancement to me.




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