Re: [PATCH 2/2] KVM: TDX: Remove redundant definitions of TDX_TD_ATTR_*

[Xiaoyao Li <xiaoyao.li@intel.com>]

On 7/8/2025 10:03 PM, Sean Christopherson wrote:
> On Tue, Jul 08, 2025, Xiaoyao Li wrote:
>> There are definitions of TD attributes bits inside asm/shared/tdx.h as
>> TDX_ATTR_*.
>>
>> Remove KVM's definitions and use the ones in asm/shared/tdx.h
>>
>> Reviewed-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
>> Signed-off-by: Xiaoyao Li <xiaoyao.li@intel.com>
>> ---
>>   arch/x86/kvm/vmx/tdx.c      | 4 ++--
>>   arch/x86/kvm/vmx/tdx_arch.h | 6 ------
>>   2 files changed, 2 insertions(+), 8 deletions(-)
>>
>> diff --git a/arch/x86/kvm/vmx/tdx.c b/arch/x86/kvm/vmx/tdx.c
>> index c539c2e6109f..efb7d589b672 100644
>> --- a/arch/x86/kvm/vmx/tdx.c
>> +++ b/arch/x86/kvm/vmx/tdx.c
>> @@ -62,7 +62,7 @@ void tdh_vp_wr_failed(struct vcpu_tdx *tdx, char *uclass, char *op, u32 field,
>>   	pr_err("TDH_VP_WR[%s.0x%x]%s0x%llx failed: 0x%llx\n", uclass, field, op, val, err);
>>   }
>>   
>> -#define KVM_SUPPORTED_TD_ATTRS (TDX_TD_ATTR_SEPT_VE_DISABLE)
>> +#define KVM_SUPPORTED_TD_ATTRS (TDX_ATTR_SEPT_VE_DISABLE)
> 
> Would it make sense to rename KVM_SUPPORTED_TD_ATTRS to KVM_SUPPORTED_TDX_ATTRS?
> The names from common code lack the TD qualifier, and I think it'd be helpful for
> readers to have have TDX in the name (even though I agree "TD" is more precise).

Personally, I prefer adding _TD_ to the common header, i.e., rename 
TDX_ATTR_SEPT_VE_DISABLE to TDX_TD_ATTR_SEPT_VE_DISABLE, or just 
TD_ATTR_SEPT_VE_DISABLE if dropping TDX prefix is acceptable.

Because TDX_ATTR OR TDX_ATTRIBUTES is ambiguous to me. There are other 
attributes defined in TDX spec, e.g., TDSYSINFO_STRUCT.ATTRIBUTES, GPA 
attributes.