xen/common: move the memory_mapping DOMCTL hypercall to common code

This commit moves to common code the implementation of the memory_mapping
DOMCTL, currently available only for the x86 architecture. It also adds
a definition for the PADDR_BITS constant for ARM, that is to be used in
common code and currently not available for the ARM architecture.

Signed-off-by: Arianna Avanzini <avanzini.arianna@gmail.com>
Acked-by: Jan Beulich <JBeulich@suse.com>
Acked-by: Julien Grall <julien.grall@citrix.com>
Tested-by: Julien Grall <julien.grall@citrix.com>
Cc: Dario Faggioli <dario.faggioli@citrix.com>
Cc: Paolo Valente <paolo.valente@unimore.it>
Cc: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Cc: Ian Campbell <Ian.Campbell@eu.citrix.com>
Cc: Keir Fraser <keir@xen.org>
Cc: Tim Deegan <tim@xen.org>
Cc: Ian Jackson <Ian.Jackson@eu.citrix.com>
Cc: Andrew Cooper <andrew.cooper3@citrix.com>
Cc: Eric Trudeau <etrudeau@broadcom.com>
Cc: Viktor Kleinik <viktor.kleinik@globallogic.com>
Cc: Andrii Tseglytskyi <andrii.tseglytskyi@globallogic.com>

diff --git a/xen/arch/arm/p2m.c b/xen/arch/arm/p2m.c
index c016450a2bcd95f8b6f1833c869d0fe86ad5f8ff..fc8c0ddf603718259c639eb0cfb2262d3630022f 100644 (file)
--- a/xen/arch/arm/p2m.c
+++ b/xen/arch/arm/p2m.c
@@ -883,24 +883,24 @@ int p2m_populate_ram(struct domain *d,
 
 int map_mmio_regions(struct domain *d,
                      unsigned long start_gfn,
-                     unsigned long nr_mfns,
+                     unsigned long nr,
                      unsigned long mfn)
 {
     return apply_p2m_changes(d, INSERT,
                              pfn_to_paddr(start_gfn),
-                             pfn_to_paddr(start_gfn + nr_mfns),
+                             pfn_to_paddr(start_gfn + nr),
                              pfn_to_paddr(mfn),
                              MATTR_DEV, p2m_mmio_direct);
 }
 
 int unmap_mmio_regions(struct domain *d,
                        unsigned long start_gfn,
-                       unsigned long nr_mfns,
+                       unsigned long nr,
                        unsigned long mfn)
 {
     return apply_p2m_changes(d, REMOVE,
                              pfn_to_paddr(start_gfn),
-                             pfn_to_paddr(start_gfn + nr_mfns),
+                             pfn_to_paddr(start_gfn + nr),
                              pfn_to_paddr(mfn),
                              MATTR_DEV, p2m_invalid);
 }

diff --git a/xen/arch/x86/domctl.c b/xen/arch/x86/domctl.c
index caa3be61cb295cc42332592079897421bdbe7d6a..7a5de438cc5c820688dc8573237a2628666e3f97 100644 (file)
--- a/xen/arch/x86/domctl.c
+++ b/xen/arch/x86/domctl.c
@@ -641,74 +641,6 @@ long arch_do_domctl(
     }
     break;
 
-    case XEN_DOMCTL_memory_mapping:
-    {
-        unsigned long gfn = domctl->u.memory_mapping.first_gfn;
-        unsigned long mfn = domctl->u.memory_mapping.first_mfn;
-        unsigned long nr_mfns = domctl->u.memory_mapping.nr_mfns;
-        unsigned long mfn_end = mfn + nr_mfns - 1;
-        int add = domctl->u.memory_mapping.add_mapping;
-
-        ret = -EINVAL;
-        if ( mfn_end < mfn || /* wrap? */
-             ((mfn | mfn_end) >> (paddr_bits - PAGE_SHIFT)) ||
-             (gfn + nr_mfns - 1) < gfn ) /* wrap? */
-            break;
-
-        ret = -EPERM;
-        if ( !iomem_access_permitted(current->domain, mfn, mfn_end) )
-            break;
-
-        ret = xsm_iomem_mapping(XSM_HOOK, d, mfn, mfn_end, add);
-        if ( ret )
-            break;
-
-        if ( add )
-        {
-            printk(XENLOG_G_INFO
-                   "memory_map:add: dom%d gfn=%lx mfn=%lx nr=%lx\n",
-                   d->domain_id, gfn, mfn, nr_mfns);
-
-            ret = iomem_permit_access(d, mfn, mfn_end);
-            if ( !ret )
-            {
-                ret = map_mmio_regions(d, gfn, nr_mfns, mfn);
-                if ( ret )
-                {
-                    printk(XENLOG_G_WARNING
-                           "memory_map:fail: dom%d gfn=%lx mfn=%lx nr=%lx ret:%ld\n",
-                           d->domain_id, gfn, mfn, nr_mfns, ret);
-                    if ( iomem_deny_access(d, mfn, mfn_end) &&
-                         is_hardware_domain(current->domain) )
-                        printk(XENLOG_ERR
-                               "memory_map: failed to deny dom%d access to [%lx,%lx]\n",
-                               d->domain_id, mfn, mfn_end);
-                }
-            }
-        }
-        else
-        {
-            int rc = 0;
-
-            printk(XENLOG_G_INFO
-                   "memory_map:remove: dom%d gfn=%lx mfn=%lx nr=%lx\n",
-                   d->domain_id, gfn, mfn, nr_mfns);
-
-            rc = unmap_mmio_regions(d, gfn, nr_mfns, mfn);
-            ret = iomem_deny_access(d, mfn, mfn_end);
-            if ( !ret )
-                ret = rc;
-            if ( ret && is_hardware_domain(current->domain) )
-                printk(XENLOG_ERR
-                       "memory_map: error %ld %s dom%d access to [%lx,%lx]\n",
-                       ret, rc ? "removing" : "denying", d->domain_id,
-                       mfn, mfn_end);
-        }
-        /* Do this unconditionally to cover errors on above failure paths. */
-        memory_type_changed(d);
-    }
-    break;
-
     case XEN_DOMCTL_ioport_mapping:
     {
         struct hvm_iommu *hd;

diff --git a/xen/common/domctl.c b/xen/common/domctl.c
index 24102c0858433715376daa90e66df81b000b8f9a..80b7800aab57b0a77101ab93ec895e4254f437b6 100644 (file)
--- a/xen/common/domctl.c
+++ b/xen/common/domctl.c
@@ -902,6 +902,74 @@ long do_domctl(XEN_GUEST_HANDLE_PARAM(xen_domctl_t) u_domctl)
     }
     break;
 
+    case XEN_DOMCTL_memory_mapping:
+    {
+        unsigned long gfn = op->u.memory_mapping.first_gfn;
+        unsigned long mfn = op->u.memory_mapping.first_mfn;
+        unsigned long nr_mfns = op->u.memory_mapping.nr_mfns;
+        unsigned long mfn_end = mfn + nr_mfns - 1;
+        int add = op->u.memory_mapping.add_mapping;
+
+        ret = -EINVAL;
+        if ( mfn_end < mfn || /* wrap? */
+             ((mfn | mfn_end) >> (paddr_bits - PAGE_SHIFT)) ||
+             (gfn + nr_mfns - 1) < gfn ) /* wrap? */
+            break;
+
+        ret = -EPERM;
+        if ( !iomem_access_permitted(current->domain, mfn, mfn_end) )
+            break;
+
+        ret = xsm_iomem_mapping(XSM_HOOK, d, mfn, mfn_end, add);
+        if ( ret )
+            break;
+
+        if ( add )
+        {
+            printk(XENLOG_G_INFO
+                   "memory_map:add: dom%d gfn=%lx mfn=%lx nr=%lx\n",
+                   d->domain_id, gfn, mfn, nr_mfns);
+
+            ret = iomem_permit_access(d, mfn, mfn_end);
+            if ( !ret )
+            {
+                ret = map_mmio_regions(d, gfn, nr_mfns, mfn);
+                if ( ret )
+                {
+                    printk(XENLOG_G_WARNING
+                           "memory_map:fail: dom%d gfn=%lx mfn=%lx nr=%lx ret:%ld\n",
+                           d->domain_id, gfn, mfn, nr_mfns, ret);
+                    if ( iomem_deny_access(d, mfn, mfn_end) &&
+                         is_hardware_domain(current->domain) )
+                        printk(XENLOG_ERR
+                               "memory_map: failed to deny dom%d access to [%lx,%lx]\n",
+                               d->domain_id, mfn, mfn_end);
+                }
+            }
+        }
+        else
+        {
+            int rc = 0;
+
+            printk(XENLOG_G_INFO
+                   "memory_map:remove: dom%d gfn=%lx mfn=%lx nr=%lx\n",
+                   d->domain_id, gfn, mfn, nr_mfns);
+
+            rc = unmap_mmio_regions(d, gfn, nr_mfns, mfn);
+            ret = iomem_deny_access(d, mfn, mfn_end);
+            if ( !ret )
+                ret = rc;
+            if ( ret && is_hardware_domain(current->domain) )
+                printk(XENLOG_ERR
+                       "memory_map: error %ld %s dom%d access to [%lx,%lx]\n",
+                       ret, rc ? "removing" : "denying", d->domain_id,
+                       mfn, mfn_end);
+        }
+        /* Do this unconditionally to cover errors on above failure paths. */
+        memory_type_changed(d);
+    }
+    break;
+
     case XEN_DOMCTL_settimeoffset:
     {
         domain_set_time_offset(d, op->u.settimeoffset.time_offset_seconds);

diff --git a/xen/include/asm-arm/p2m.h b/xen/include/asm-arm/p2m.h
index 648144f2af273f1bef79c2f598f0179b385b0aa7..08ce07b679b19a151ae68a2c8c15f03bb731a6d4 100644 (file)
--- a/xen/include/asm-arm/p2m.h
+++ b/xen/include/asm-arm/p2m.h
@@ -3,6 +3,10 @@
 
 #include <xen/mm.h>
 
+#include <xen/p2m-common.h>
+
+#define paddr_bits PADDR_BITS
+
 struct domain;
 
 extern void memory_type_changed(struct domain *);
@@ -101,17 +105,6 @@ int p2m_cache_flush(struct domain *d, xen_pfn_t start_mfn, xen_pfn_t end_mfn);
 
 /* Setup p2m RAM mapping for domain d from start-end. */
 int p2m_populate_ram(struct domain *d, paddr_t start, paddr_t end);
-/* Map MMIO regions in the p2m: start_gfn and nr_mfns describe the range
- * in the guest physical address space to map, starting from the machine
- * frame number mfn. */
-int map_mmio_regions(struct domain *d,
-                     unsigned long start_gfn,
-                     unsigned long nr_mfns,
-                     unsigned long mfn);
-int unmap_mmio_regions(struct domain *d,
-                       unsigned long start_gfn,
-                       unsigned long nr_mfns,
-                       unsigned long mfn);
 
 int guest_physmap_add_entry(struct domain *d,
                             unsigned long gfn,

diff --git a/xen/include/asm-x86/p2m.h b/xen/include/asm-x86/p2m.h
index 2a128ed1ea5ac6d82ba3340a1fe9b3082cdc4fd0..39f235db411c002e78db83a17a7b22b125f77bd9 100644 (file)
--- a/xen/include/asm-x86/p2m.h
+++ b/xen/include/asm-x86/p2m.h
@@ -29,21 +29,10 @@
 
 #include <xen/config.h>
 #include <xen/paging.h>
+#include <xen/p2m-common.h>
 #include <asm/mem_sharing.h>
 #include <asm/page.h>    /* for pagetable_t */
 
-/* Map MMIO regions in the p2m: start_gfn and nr describe the range in
- * the guest physical address space to map, starting from the machine
- * frame number mfn. */
-int map_mmio_regions(struct domain *d,
-                     unsigned long start_gfn,
-                     unsigned long nr,
-                     unsigned long mfn);
-int unmap_mmio_regions(struct domain *d,
-                       unsigned long start_gfn,
-                       unsigned long nr,
-                       unsigned long mfn);
-
 extern bool_t opt_hap_1gb, opt_hap_2mb;
 
 /*

diff --git a/xen/include/xen/p2m-common.h b/xen/include/xen/p2m-common.h
new file mode 100644 (file)
index 0000000..9f1b771
--- /dev/null
+++ b/xen/include/xen/p2m-common.h
@@ -0,0 +1,16 @@
+#ifndef _XEN_P2M_COMMON_H
+#define _XEN_P2M_COMMON_H
+
+/* Map MMIO regions in the p2m: start_gfn and nr describe the range in
+ *  * the guest physical address space to map, starting from the machine
+ *   * frame number mfn. */
+int map_mmio_regions(struct domain *d,
+                     unsigned long start_gfn,
+                     unsigned long nr,
+                     unsigned long mfn);
+int unmap_mmio_regions(struct domain *d,
+                       unsigned long start_gfn,
+                       unsigned long nr,
+                       unsigned long mfn);
+
+#endif /* _XEN_P2M_COMMON_H */