[TODO TDX] Convert apicid and vpid from the TDX module

[ramesh-thomas]

In arch/x86/hyperv/hv_vtl.c: hv_vtl_wakeup_secondary_cpu(),

/* TODO TDX: we cannot trust the hypervisor to perform this mapping...
Instead, we need hypervisor support for TDX 1.5 ENUM_TOPOLOGY to query
this directly from the tdx module. */

(Migrated internal issue #1261)

[ramesh-thomas]

yjiang5 on Oct 30:

This will not be needed once we have the ACPI mailbox code merged.

[ramesh-thomas]

Depends on #581

[ramesh-thomas]

@chris-oo once #581 is merged, what should we do about the below code?

    /*
     * TODO TDX: we cannot trust the hypervisor to perform this mapping...
     * Instead, we need hypervisor support for TDX 1.5 ENUM_TOPOLOGY to
     * query this directly from the TDX module.
     */
    vp_id = hv_vtl_apicid_to_vp_id(apicid);

    if (vp_id < 0) {
            pr_err("Couldn't find CPU with APIC ID %d\n", apicid);
            return -EINVAL;
    }
    if (vp_id > ms_hyperv.max_vp_index) {
            pr_err("Invalid CPU id %d for APIC ID %d\n", vp_id, apicid);
            return -EINVAL;
    }

    if (hv_isolation_type_tdx())
            return hv_vtl_bringup_tdx_vcpu(vp_id, start_eip);
    else
            return hv_vtl_bringup_vcpu(vp_id, cpu, start_eip);

[chris-oo]

We should leave that TODO in there until we have the right hypervisor support. I can start a conversation internally about this.