[PATCH V2 03/12] KVM: TDX: Set arch.has_protected_state to true

[Adrian Hunter <adrian.hunter@intel.com>]

TDX VMs have protected state. Accordingly, set arch.has_protected_state to
true.

This will cause the following IOCTL functions to return an error:

	kvm_arch_vcpu_ioctl()	case KVM_GET_SREGS2
	kvm_arch_vcpu_ioctl()	case KVM_SET_SREGS2
	kvm_arch_vcpu_ioctl_get_regs()
	kvm_arch_vcpu_ioctl_set_regs()
	kvm_arch_vcpu_ioctl_get_sregs()
	kvm_arch_vcpu_ioctl_set_sregs()
	kvm_vcpu_ioctl_x86_get_debugregs()
	kvm_vcpu_ioctl_x86_set_debugregs
	kvm_vcpu_ioctl_x86_get_xcrs()
	kvm_vcpu_ioctl_x86_set_xcrs()

In addition, the following will error for confidential FPU state:

	kvm_vcpu_ioctl_x86_get_xsave ()
	kvm_vcpu_ioctl_x86_get_xsave2()
	kvm_vcpu_ioctl_x86_set_xsave()
	kvm_arch_vcpu_ioctl_get_fpu()
	kvm_arch_vcpu_ioctl_set_fpu()

And finally, in accordance with commit 66155de93bcf ("KVM: x86: Disallow
read-only memslots for SEV-ES and SEV-SNP (and TDX)"), read-only
memslots will be disallowed.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
---
TD vcpu enter/exit v2:
 - New patch
---
 arch/x86/kvm/vmx/tdx.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/x86/kvm/vmx/tdx.c b/arch/x86/kvm/vmx/tdx.c
index ea9498028212..a7ebdafdfd82 100644
--- a/arch/x86/kvm/vmx/tdx.c
+++ b/arch/x86/kvm/vmx/tdx.c
@@ -553,6 +553,7 @@ int tdx_vm_init(struct kvm *kvm)
 {
 	struct kvm_tdx *kvm_tdx = to_kvm_tdx(kvm);
 
+	kvm->arch.has_protected_state = true;
 	kvm->arch.has_private_mem = true;
 
 	/*
-- 
2.43.0