KVM: selftests: Move GDT, IDT, and TSS fields to x86's kvm_vm_arch

Now that kvm_vm_arch exists, move the GDT, IDT, and TSS fields to x86's
implementation, as the structures are firmly x86-only.

Reviewed-by: Ackerley Tng <ackerleytng@google.com>
Link: https://lore.kernel.org/r/20240314232637.2538648-4-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>

tools/testing/selftests/kvm/include/kvm_util.h

@@ -93,9 +93,6 @@ struct kvm_vm {
 	bool pgd_created;
 	vm_paddr_t ucall_mmio_addr;
 	vm_paddr_t pgd;
-	vm_vaddr_t gdt;
-	vm_vaddr_t tss;
-	vm_vaddr_t idt;
 	vm_vaddr_t handlers;
 	uint32_t dirty_ring_size;
 	uint64_t gpa_tag_mask;

tools/testing/selftests/kvm/include/x86_64/kvm_util_arch.h

@@ -5,11 +5,16 @@
 #include <stdbool.h>
 #include <stdint.h>
 
+#include "kvm_util_types.h"
 #include "test_util.h"
 
 extern bool is_forced_emulation_enabled;
 
 struct kvm_vm_arch {
+	vm_vaddr_t gdt;
+	vm_vaddr_t tss;
+	vm_vaddr_t idt;
+
 	uint64_t c_bit;
 	uint64_t s_bit;
 	int sev_fd;