Re: [PATCH 4/6] x86/hyperv: Add hv_isolation_type_tdx() to detect TDX guests

From: Dave Hansen
Date: Mon Nov 21 2022 - 16:01:57 EST


On 11/21/22 11:51, Dexuan Cui wrote:
> + switch (hv_get_isolation_type()) {
> + case HV_ISOLATION_TYPE_VBS:
> + case HV_ISOLATION_TYPE_SNP:
> cc_set_vendor(CC_VENDOR_HYPERV);
> + break;
> +
> + case HV_ISOLATION_TYPE_TDX:
> + static_branch_enable(&isolation_type_tdx);
> + break;

This makes zero logical sense to me.

Running on Hyper-V, a HV_ISOLATION_TYPE_SNP is CC_VENDOR_HYPERV, but a
HV_ISOLATION_TYPE_TDX guest is *NOT* CC_VENDOR_HYPERV?