[xen staging] fully replace mfn_to_gmfn()

[patchbot@xxxxxxx]

commit f24ec0ed220a43e19059c3fe4f803be458930a1d
Author:     Jan Beulich <jbeulich@xxxxxxxx>
AuthorDate: Tue Jun 29 11:00:51 2021 +0200
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Tue Jun 29 11:00:51 2021 +0200

    fully replace mfn_to_gmfn()
    
    Convert the two remaining uses as well as Arm's stub to the properly
    named and type-safe mfn_to_gfn(), dropping x86's definition (where we
    already have mfn_to_gfn()).
    
    Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
    Acked-by: Julien Grall <julien@xxxxxxx>
    Acked-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
---
 xen/common/domctl.c      | 3 ++-
 xen/common/memory.c      | 8 ++++----
 xen/include/asm-arm/mm.h | 3 +--
 xen/include/asm-x86/mm.h | 5 -----
 4 files changed, 7 insertions(+), 12 deletions(-)

diff --git a/xen/common/domctl.c b/xen/common/domctl.c
index ef202c2b8c..12d6144d28 100644
--- a/xen/common/domctl.c
+++ b/xen/common/domctl.c
@@ -111,7 +111,8 @@ void getdomaininfo(struct domain *d, struct 
xen_domctl_getdomaininfo *info)
     info->outstanding_pages = d->outstanding_pages;
     info->shr_pages         = atomic_read(&d->shr_pages);
     info->paged_pages       = atomic_read(&d->paged_pages);
-    info->shared_info_frame = mfn_to_gmfn(d, virt_to_mfn(d->shared_info));
+    info->shared_info_frame =
+        gfn_x(mfn_to_gfn(d, _mfn(virt_to_mfn(d->shared_info))));
     BUG_ON(SHARED_M2P(info->shared_info_frame));
 
     info->cpupool = cpupool_get_id(d);
diff --git a/xen/common/memory.c b/xen/common/memory.c
index ba212f971c..e07bd9a5ea 100644
--- a/xen/common/memory.c
+++ b/xen/common/memory.c
@@ -714,13 +714,13 @@ static long 
memory_exchange(XEN_GUEST_HANDLE_PARAM(xen_memory_exchange_t) arg)
          */
         while ( (page = page_list_remove_head(&in_chunk_list)) )
         {
-            unsigned long gfn;
+            gfn_t gfn;
 
             mfn = page_to_mfn(page);
-            gfn = mfn_to_gmfn(d, mfn_x(mfn));
+            gfn = mfn_to_gfn(d, mfn);
             /* Pages were unshared above */
-            BUG_ON(SHARED_M2P(gfn));
-            if ( guest_physmap_remove_page(d, _gfn(gfn), mfn, 0) )
+            BUG_ON(SHARED_M2P(gfn_x(gfn)));
+            if ( guest_physmap_remove_page(d, gfn, mfn, 0) )
                 domain_crash(d);
             free_domheap_page(page);
         }
diff --git a/xen/include/asm-arm/mm.h b/xen/include/asm-arm/mm.h
index 0b7de3102e..ded74d29da 100644
--- a/xen/include/asm-arm/mm.h
+++ b/xen/include/asm-arm/mm.h
@@ -328,8 +328,7 @@ struct page_info *get_page_from_gva(struct vcpu *v, vaddr_t 
va,
 
 /* Xen always owns P2M on ARM */
 #define set_gpfn_from_mfn(mfn, pfn) do { (void) (mfn), (void)(pfn); } while (0)
-#define mfn_to_gmfn(_d, mfn)  (mfn)
-
+#define mfn_to_gfn(d, mfn) ((void)(d), _gfn(mfn_x(mfn)))
 
 /* Arch-specific portion of memory_op hypercall. */
 long arch_memory_op(int op, XEN_GUEST_HANDLE_PARAM(void) arg);
diff --git a/xen/include/asm-x86/mm.h b/xen/include/asm-x86/mm.h
index 80b0ccffaa..cb90527499 100644
--- a/xen/include/asm-x86/mm.h
+++ b/xen/include/asm-x86/mm.h
@@ -527,11 +527,6 @@ extern struct rangeset *mmio_ro_ranges;
 
 #define get_gpfn_from_mfn(mfn)      (machine_to_phys_mapping[(mfn)])
 
-#define mfn_to_gmfn(_d, mfn)                            \
-    ( (paging_mode_translate(_d))                       \
-      ? get_gpfn_from_mfn(mfn)                          \
-      : (mfn) )
-
 #define compat_pfn_to_cr3(pfn) (((unsigned)(pfn) << 12) | ((unsigned)(pfn) >> 
20))
 #define compat_cr3_to_pfn(cr3) (((unsigned)(cr3) >> 12) | ((unsigned)(cr3) << 
20))
 
--
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