Re: [PATCH v13 016/113] KVM: TDX: x86: Add ioctl to get TDX systemwide parameters

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On 3/25/2023 4:43 PM, Zhi Wang wrote:
On Sun, 12 Mar 2023 10:55:40 -0700
isaku.yamahata@xxxxxxxxx  wrote:

Does this have to be a new generic ioctl with a dedicated new x86_ops? SNP
does not use it at all and all the system-scoped ioctl of SNP going through
the CCP driver. So getting system-scope information of TDX/SNP will end up
differently.

Any thought, Sean? Moving getting SNP system-wide information to
KVM dev ioctl seems not ideal and TDX does not have a dedicated driver like
CCP. Maybe make this ioctl TDX-specific? KVM_TDX_DEV_OP?

What's the real different of it? For me, it's just renaming KVM_MEMORY_ENCRYPT_OP to KVM_TDX_DEV_OP and maybe add some error message if the IOCTL is issued for AMD plaform.




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