we've done it, it boots!

xencall/src/domctl.rs

@@ -15,7 +15,7 @@ use std::ptr::addr_of_mut;
 use std::slice;
 
 pub struct DomainControl<'a> {
-    call: &'a XenCall,
+    pub call: &'a XenCall,
 }
 
 impl DomainControl<'_> {

xencall/src/lib.rs

@@ -3,7 +3,7 @@ pub mod memory;
 pub mod sys;
 
 use crate::sys::{
-    Hypercall, MmapBatch, MultiCallEntry, XenCapabilitiesInfo, HYPERVISOR_MULTICALL,
+    Hypercall, MmapBatch, MmapResource, MultiCallEntry, XenCapabilitiesInfo, HYPERVISOR_MULTICALL,
     HYPERVISOR_XEN_VERSION, XENVER_CAPABILITIES,
 };
 use libc::{mmap, MAP_FAILED, MAP_SHARED, PROT_READ, PROT_WRITE};
@@ -168,6 +168,29 @@ impl XenCall {
         Ok(())
     }
 
+    pub fn map_resource(
+        &self,
+        domid: u32,
+        typ: u32,
+        id: u32,
+        idx: u32,
+        num: u64,
+        addr: u64,
+    ) -> Result<(), XenCallError> {
+        let mut resource = MmapResource {
+            dom: domid as u16,
+            typ,
+            id,
+            idx,
+            num,
+            addr,
+        };
+        unsafe {
+            sys::mmap_resource(self.handle.as_raw_fd(), &mut resource)?;
+        }
+        Ok(())
+    }
+
     pub fn mmap_batch(
         &self,
         domid: u32,

xencall/src/sys.rs

@@ -18,6 +18,17 @@ pub struct MmapEntry {
     pub npages: u64,
 }
 
+#[repr(C)]
+#[derive(Copy, Clone, Debug, Default)]
+pub struct MmapResource {
+    pub dom: u16,
+    pub typ: u32,
+    pub id: u32,
+    pub idx: u32,
+    pub num: u64,
+    pub addr: u64,
+}
+
 #[repr(C)]
 #[derive(Copy, Clone, Debug)]
 pub struct MmapBatch {
@@ -39,10 +50,12 @@ pub struct Mmap {
 const IOCTL_PRIVCMD_HYPERCALL: u64 = 0x305000;
 const IOCTL_PRIVCMD_MMAP: u64 = 0x105002;
 const IOCTL_PRIVCMD_MMAPBATCH_V2: u64 = 0x205004;
+const IOCTL_PRIVCMD_MMAP_RESOURCE: u64 = 0x205007;
 
 ioctl_readwrite_bad!(hypercall, IOCTL_PRIVCMD_HYPERCALL, Hypercall);
 ioctl_readwrite_bad!(mmap, IOCTL_PRIVCMD_MMAP, Mmap);
 ioctl_readwrite_bad!(mmapbatch, IOCTL_PRIVCMD_MMAPBATCH_V2, MmapBatch);
+ioctl_readwrite_bad!(mmap_resource, IOCTL_PRIVCMD_MMAP_RESOURCE, MmapResource);
 
 pub const HYPERVISOR_SET_TRAP_TABLE: c_ulong = 0;
 pub const HYPERVISOR_MMU_UPDATE: c_ulong = 1;