TDX VM requires VM type KVM_X86_TDX_VM to be passed to
kvm_ioctl(KVM_CREATE_VM). Hence implement mc->kvm_type() for i386
architecture.
If tdx-guest object is specified to confidential-guest-support, like,
qemu -machine ...,confidential-guest-support=tdx0 \
-object tdx-guest,id=tdx0,...
it parses VM type as KVM_X86_TDX_VM. Otherwise, it's KVM_X86_DEFAULT_VM.
Also store the vm_type in MachineState for other code to query what the
VM type is.
Signed-off-by: Xiaoyao Li <xiaoyao.li@intel.com>
Acked-by: Gerd Hoffmann <kraxel@redhat.com>
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Changes in v4:
- fix the build error of kvm_get_vm_type() when --disable-kvm;
edafba3921