@@ -123,7 +123,7 @@ KVM_X86_OP(leave_smm)
KVM_X86_OP(enable_smi_window)
#endif
KVM_X86_OP_OPTIONAL(dev_get_attr)
-KVM_X86_OP_OPTIONAL(mem_enc_ioctl)
+KVM_X86_OP(mem_enc_ioctl)
KVM_X86_OP_OPTIONAL(mem_enc_register_region)
KVM_X86_OP_OPTIONAL(mem_enc_unregister_region)
KVM_X86_OP_OPTIONAL(vm_copy_enc_context_from)
@@ -926,4 +926,28 @@ struct kvm_hyperv_eventfd {
#define KVM_X86_SNP_VM 4
#define KVM_X86_TDX_VM 5
+/* Trust Domain eXtension sub-ioctl() commands. */
+enum kvm_tdx_cmd_id {
+ KVM_TDX_CMD_NR_MAX,
+};
+
+struct kvm_tdx_cmd {
+ /* enum kvm_tdx_cmd_id */
+ __u32 id;
+ /* flags for sub-commend. If sub-command doesn't use this, set zero. */
+ __u32 flags;
+ /*
+ * data for each sub-command. An immediate or a pointer to the actual
+ * data in process virtual address. If sub-command doesn't use it,
+ * set zero.
+ */
+ __u64 data;
+ /*
+ * Auxiliary error code. The sub-command may return TDX SEAMCALL
+ * status code in addition to -Exxx.
+ * Defined for consistency with struct kvm_sev_cmd.
+ */
+ __u64 hw_error;
+};
+
#endif /* _ASM_X86_KVM_H */
@@ -41,6 +41,14 @@ static __init int vt_hardware_setup(void)
return 0;
}
+static int vt_mem_enc_ioctl(struct kvm *kvm, void __user *argp)
+{
+ if (!is_td(kvm))
+ return -ENOTTY;
+
+ return tdx_vm_ioctl(kvm, argp);
+}
+
#define VMX_REQUIRED_APICV_INHIBITS \
(BIT(APICV_INHIBIT_REASON_DISABLED) | \
BIT(APICV_INHIBIT_REASON_ABSENT) | \
@@ -191,6 +199,8 @@ struct kvm_x86_ops vt_x86_ops __initdata = {
.vcpu_deliver_sipi_vector = kvm_vcpu_deliver_sipi_vector,
.get_untagged_addr = vmx_get_untagged_addr,
+
+ .mem_enc_ioctl = vt_mem_enc_ioctl,
};
struct kvm_x86_init_ops vt_init_ops __initdata = {
@@ -2,6 +2,7 @@
#include <linux/cpu.h>
#include <asm/tdx.h>
#include "capabilities.h"
+#include "x86_ops.h"
#include "tdx.h"
#undef pr_fmt
@@ -29,6 +30,37 @@ static enum cpuhp_state tdx_cpuhp_state;
static const struct tdx_sys_info *tdx_sysinfo;
+int tdx_vm_ioctl(struct kvm *kvm, void __user *argp)
+{
+ struct kvm_tdx_cmd tdx_cmd;
+ int r;
+
+ if (copy_from_user(&tdx_cmd, argp, sizeof(struct kvm_tdx_cmd)))
+ return -EFAULT;
+
+ /*
+ * Userspace should never set hw_error. It is used to fill
+ * hardware-defined error by the kernel.
+ */
+ if (tdx_cmd.hw_error)
+ return -EINVAL;
+
+ mutex_lock(&kvm->lock);
+
+ switch (tdx_cmd.id) {
+ default:
+ r = -EINVAL;
+ goto out;
+ }
+
+ if (copy_to_user(argp, &tdx_cmd, sizeof(struct kvm_tdx_cmd)))
+ r = -EFAULT;
+
+out:
+ mutex_unlock(&kvm->lock);
+ return r;
+}
+
static int tdx_online_cpu(unsigned int cpu)
{
unsigned long flags;
@@ -118,4 +118,10 @@ void vmx_cancel_hv_timer(struct kvm_vcpu *vcpu);
#endif
void vmx_setup_mce(struct kvm_vcpu *vcpu);
+#ifdef CONFIG_INTEL_TDX_HOST
+int tdx_vm_ioctl(struct kvm *kvm, void __user *argp);
+#else
+static inline int tdx_vm_ioctl(struct kvm *kvm, void __user *argp) { return -EOPNOTSUPP; }
+#endif
+
#endif /* __KVM_X86_VMX_X86_OPS_H */
@@ -7308,10 +7308,6 @@ int kvm_arch_vm_ioctl(struct file *filp, unsigned int ioctl, unsigned long arg)
goto out;
}
case KVM_MEMORY_ENCRYPT_OP: {
- r = -ENOTTY;
- if (!kvm_x86_ops.mem_enc_ioctl)
- goto out;
-
r = kvm_x86_call(mem_enc_ioctl)(kvm, argp);
break;
}