On 4/4/2024 9:27 AM, Isaku Yamahata wrote:
On Tue, Apr 02, 2024 at 04:52:46PM +0800,
Chao Gao <chao.gao@xxxxxxxxx> wrote:
+static int tdx_emulate_vmcall(struct kvm_vcpu *vcpu)
+{
+ unsigned long nr, a0, a1, a2, a3, ret;
+
do you need to emulate xen/hyper-v hypercalls here?
No. kvm_emulate_hypercall() handles xen/hyper-v hypercalls,
__kvm_emulate_hypercall() doesn't.
So for TDX, kvm doesn't support xen/hyper-v, right?
Then, should KVM_CAP_XEN_HVM and KVM_CAP_HYPERV be filtered out for TDX?
Nothing tells userspace that xen/hyper-v hypercalls are not supported and
so userspace may expose related CPUID leafs to TD guests.
