diff --git a/xen/arch/x86/hvm/ioreq.c b/xen/arch/x86/hvm/ioreq.c
index 1fbc81fb15..0aacd7d2c2 100644
--- a/xen/arch/x86/hvm/ioreq.c
+++ b/xen/arch/x86/hvm/ioreq.c
@@ -260,6 +260,19 @@ static int hvm_map_ioreq_gfn(struct hvm_ioreq_server *s, bool buf)
     struct hvm_ioreq_page *iorp = buf ? &s->bufioreq : &s->ioreq;
     int rc;
 
+    if ( iorp->page )
+    {
+        /*
+         * If a page has already been allocated (which will happen on
+         * demand if hvm_get_ioreq_server_frame() is called), then
+         * mapping a guest frame is not permitted.
+         */
+        if ( gfn_eq(iorp->gfn, INVALID_GFN) )
+            return -EPERM;
+
+        return 0;
+    }
+
     if ( d->is_dying )
         return -EINVAL;
 
@@ -282,6 +295,61 @@ static int hvm_map_ioreq_gfn(struct hvm_ioreq_server *s, bool buf)
     return rc;
 }
 
+static int hvm_alloc_ioreq_mfn(struct hvm_ioreq_server *s, bool buf)
+{
+    struct domain *currd = current->domain;
+    struct hvm_ioreq_page *iorp = buf ? &s->bufioreq : &s->ioreq;
+
+    if ( iorp->page )
+    {
+        /*
+         * If a guest frame has already been mapped (which may happen
+         * on demand if hvm_get_ioreq_server_info() is called), then
+         * allocating a page is not permitted.
+         */
+        if ( !gfn_eq(iorp->gfn, INVALID_GFN) )
+            return -EPERM;
+
+        return 0;
+    }
+
+    /*
+     * Allocated IOREQ server pages are assigned to the emulating
+     * domain, not the target domain. This is because the emulator is
+     * likely to be destroyed after the target domain has been torn
+     * down, and we must use MEMF_no_refcount otherwise page allocation
+     * could fail if the emulating domain has already reached its
+     * maximum allocation.
+     */
+    iorp->page = alloc_domheap_page(currd, MEMF_no_refcount);
+    if ( !iorp->page )
+        return -ENOMEM;
+
+    iorp->va = __map_domain_page_global(iorp->page);
+    if ( !iorp->va )
+    {
+        iorp->page = NULL;
+        return -ENOMEM;
+    }
+
+    clear_page(iorp->va);
+    return 0;
+}
+
+static void hvm_free_ioreq_mfn(struct hvm_ioreq_server *s, bool buf)
+{
+    struct hvm_ioreq_page *iorp = buf ? &s->bufioreq : &s->ioreq;
+
+    if ( !iorp->page )
+        return;
+
+    unmap_domain_page_global(iorp->va);
+    iorp->va = NULL;
+
+    put_page(iorp->page);
+    iorp->page = NULL;
+}
+
 bool is_ioreq_server_page(struct domain *d, const struct page_info *page)
 {
     const struct hvm_ioreq_server *s;
@@ -488,6 +556,27 @@ static void hvm_ioreq_server_unmap_pages(struct hvm_ioreq_server *s)
     hvm_unmap_ioreq_gfn(s, false);
 }
 
+static int hvm_ioreq_server_alloc_pages(struct hvm_ioreq_server *s)
+{
+    int rc;
+
+    rc = hvm_alloc_ioreq_mfn(s, false);
+
+    if ( !rc && (s->bufioreq_handling != HVM_IOREQSRV_BUFIOREQ_OFF) )
+        rc = hvm_alloc_ioreq_mfn(s, true);
+
+    if ( rc )
+        hvm_free_ioreq_mfn(s, false);
+
+    return rc;
+}
+
+static void hvm_ioreq_server_free_pages(struct hvm_ioreq_server *s)
+{
+    hvm_free_ioreq_mfn(s, true);
+    hvm_free_ioreq_mfn(s, false);
+}
+
 static void hvm_ioreq_server_free_rangesets(struct hvm_ioreq_server *s)
 {
     unsigned int i;
@@ -614,7 +703,18 @@ static int hvm_ioreq_server_init(struct hvm_ioreq_server *s,
 
  fail_add:
     hvm_ioreq_server_remove_all_vcpus(s);
+
+    /*
+     * NOTE: It is safe to call both hvm_ioreq_server_unmap_pages() and
+     *       hvm_ioreq_server_free_pages() in that order.
+     *       This is because the former will do nothing if the pages
+     *       are not mapped, leaving the page to be freed by the latter.
+     *       However if the pages are mapped then the former will set
+     *       the page_info pointer to NULL, meaning the latter will do
+     *       nothing.
+     */
     hvm_ioreq_server_unmap_pages(s);
+    hvm_ioreq_server_free_pages(s);
 
     return rc;
 }
@@ -624,6 +724,7 @@ static void hvm_ioreq_server_deinit(struct hvm_ioreq_server *s)
     ASSERT(!s->enabled);
     hvm_ioreq_server_remove_all_vcpus(s);
     hvm_ioreq_server_unmap_pages(s);
+    hvm_ioreq_server_free_pages(s);
     hvm_ioreq_server_free_rangesets(s);
 }
 
@@ -762,7 +863,8 @@ int hvm_get_ioreq_server_info(struct domain *d, ioservid_t id,
             goto out;
     }
 
-    *ioreq_gfn = gfn_x(s->ioreq.gfn);
+    if ( ioreq_gfn )
+        *ioreq_gfn = gfn_x(s->ioreq.gfn);
 
     if ( HANDLE_BUFIOREQ(s) )
     {
@@ -780,6 +882,33 @@ int hvm_get_ioreq_server_info(struct domain *d, ioservid_t id,
     return rc;
 }
 
+mfn_t hvm_get_ioreq_server_frame(struct domain *d, ioservid_t id,
+                                 unsigned int idx)
+{
+    struct hvm_ioreq_server *s;
+    mfn_t mfn = INVALID_MFN;
+
+    spin_lock_recursive(&d->arch.hvm_domain.ioreq_server.lock);
+
+    s = get_ioreq_server(d, id);
+
+    if ( id >= MAX_NR_IOREQ_SERVERS || !s || IS_DEFAULT(s) )
+        goto out;
+
+    if ( hvm_ioreq_server_alloc_pages(s) )
+        goto out;
+
+    if ( idx == 0 )
+        mfn = _mfn(page_to_mfn(s->bufioreq.page));
+    else if ( idx == 1 )
+        mfn = _mfn(page_to_mfn(s->ioreq.page));
+
+ out:
+    spin_unlock_recursive(&d->arch.hvm_domain.ioreq_server.lock);
+
+    return mfn;
+}
+
 int hvm_map_io_range_to_ioreq_server(struct domain *d, ioservid_t id,
                                      uint32_t type, uint64_t start,
                                      uint64_t end)
diff --git a/xen/arch/x86/mm.c b/xen/arch/x86/mm.c
index c8f50f3bb0..87debbdef3 100644
--- a/xen/arch/x86/mm.c
+++ b/xen/arch/x86/mm.c
@@ -122,6 +122,7 @@
 #include <asm/fixmap.h>
 #include <asm/io_apic.h>
 #include <asm/pci.h>
+#include <asm/hvm/ioreq.h>
 
 #include <asm/hvm/grant_table.h>
 #include <asm/pv/grant_table.h>
@@ -4795,6 +4796,27 @@ static int xenmem_acquire_grant_table(struct domain *d,
     return 0;
 }
 
+static int xenmem_acquire_ioreq_server(struct domain *d,
+                                       unsigned int id,
+                                       unsigned long frame,
+                                       unsigned long nr_frames,
+                                       unsigned long mfn_list[])
+{
+    unsigned int i;
+
+    for ( i = 0; i < nr_frames; i++ )
+    {
+        mfn_t mfn = hvm_get_ioreq_server_frame(d, id, frame + i);
+
+        if ( mfn_eq(mfn, INVALID_MFN) )
+            return -EINVAL;
+
+        mfn_list[i] = mfn_x(mfn);
+    }
+
+    return 0;
+}
+
 static int xenmem_acquire_resource(xen_mem_acquire_resource_t *xmar)
 {
     struct domain *d, *currd = current->domain;
@@ -4829,6 +4851,11 @@ static int xenmem_acquire_resource(xen_mem_acquire_resource_t *xmar)
                                         mfn_list);
         break;
 
+    case XENMEM_resource_ioreq_server:
+        rc = xenmem_acquire_ioreq_server(d, xmar->id, xmar->frame,
+                                         xmar->nr_frames, mfn_list);
+        break;
+
     default:
         rc = -EOPNOTSUPP;
         break;
diff --git a/xen/include/asm-x86/hvm/ioreq.h b/xen/include/asm-x86/hvm/ioreq.h
index 1829fcf43e..46b275f72f 100644
--- a/xen/include/asm-x86/hvm/ioreq.h
+++ b/xen/include/asm-x86/hvm/ioreq.h
@@ -31,6 +31,12 @@ int hvm_get_ioreq_server_info(struct domain *d, ioservid_t id,
                               unsigned long *ioreq_gfn,
                               unsigned long *bufioreq_gfn,
                               evtchn_port_t *bufioreq_port);
+/*
+ * Get the mfn of either the buffered or synchronous ioreq frame.
+ * (idx == 0 -> buffered, idx == 1 -> synchronous).
+ */
+mfn_t hvm_get_ioreq_server_frame(struct domain *d, ioservid_t id,
+                                 unsigned int idx);
 int hvm_map_io_range_to_ioreq_server(struct domain *d, ioservid_t id,
                                      uint32_t type, uint64_t start,
                                      uint64_t end);
diff --git a/xen/include/public/hvm/dm_op.h b/xen/include/public/hvm/dm_op.h
index 9677bd74e7..59b6006910 100644
--- a/xen/include/public/hvm/dm_op.h
+++ b/xen/include/public/hvm/dm_op.h
@@ -90,6 +90,10 @@ struct xen_dm_op_create_ioreq_server {
  * the frame numbers passed back in gfns <ioreq_gfn> and <bufioreq_gfn>
  * respectively. (If the IOREQ Server is not handling buffered emulation
  * only <ioreq_gfn> will be valid).
+ *
+ * NOTE: To access the synchronous ioreq structures and buffered ioreq
+ *       ring, it is preferable to use the XENMEM_acquire_resource memory
+ *       op specifying resource type XENMEM_resource_ioreq_server.
  */
 #define XEN_DMOP_get_ioreq_server_info 2
 
diff --git a/xen/include/public/memory.h b/xen/include/public/memory.h
index 9bf58e7384..716941dc0c 100644
--- a/xen/include/public/memory.h
+++ b/xen/include/public/memory.h
@@ -664,10 +664,13 @@ struct xen_mem_acquire_resource {
     uint16_t type;
 
 #define XENMEM_resource_grant_table 0
+#define XENMEM_resource_ioreq_server 1
 
     /*
      * IN - a type-specific resource identifier, which must be zero
      *      unless stated otherwise.
+     *
+     * type == XENMEM_resource_ioreq_server -> id == ioreq server id
      */
     uint32_t id;
     /* IN - number of (4K) frames of the resource to be mapped */
