xen/grant-table: Make arch specific macros typesafe

This patch rework all the arch specific macros in grant_table.h to use
the typesafe MFN/GFN.

At the same time, some functions are renamed s/gmfn/gfn/ to match the
current naming scheme (see include/mm.h).

No functional changes intended.

Signed-off-by: Julien Grall <julien.grall@arm.com>
Acked-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>

diff --git a/xen/common/grant_table.c b/xen/common/grant_table.c
index c9cf50f9c551465886722d5e964f17d53df95eb8..b34d520f6d4939864b6546f3fe57a370178f3ecf 100644 (file)
--- a/xen/common/grant_table.c
+++ b/xen/common/grant_table.c
@@ -1974,7 +1974,7 @@ gnttab_setup_table(
     op.status = GNTST_okay;
     for ( i = 0; i < op.nr_frames; i++ )
     {
-        xen_pfn_t gmfn = gnttab_shared_gmfn(d, gt, i);
+        xen_pfn_t gmfn = gfn_x(gnttab_shared_gfn(d, gt, i));
 
         /* Grant tables cannot be shared */
         BUG_ON(SHARED_M2P(gmfn));
@@ -3212,7 +3212,7 @@ gnttab_get_status_frames(XEN_GUEST_HANDLE_PARAM(gnttab_get_status_frames_t) uop,
 
     for ( i = 0; i < op.nr_frames; i++ )
     {
-        gmfn = gnttab_status_gmfn(d, gt, i);
+        gmfn = gfn_x(gnttab_status_gfn(d, gt, i));
         if ( copy_to_guest_offset(op.frame_list, i, &gmfn, 1) )
             op.status = GNTST_bad_virt_addr;
     }

diff --git a/xen/include/asm-arm/grant_table.h b/xen/include/asm-arm/grant_table.h
index ad120827ea644d2db3ce3cc34d74512e12d4ed5c..6f585b1538e1084ded5fa8625e8e3ed03735eb0f 100644 (file)
--- a/xen/include/asm-arm/grant_table.h
+++ b/xen/include/asm-arm/grant_table.h
@@ -78,15 +78,15 @@ int replace_grant_host_mapping(unsigned long gpaddr, mfn_t mfn,
     } while ( 0 )
 
 #define gnttab_get_frame_gfn(gt, st, idx) ({                             \
-   _gfn((st) ? gnttab_status_gmfn(NULL, gt, idx)                         \
-             : gnttab_shared_gmfn(NULL, gt, idx));                       \
+   (st) ? gnttab_status_gfn(NULL, gt, idx)                               \
+        : gnttab_shared_gfn(NULL, gt, idx);                              \
 })
 
-#define gnttab_shared_gmfn(d, t, i)                                      \
-    gfn_x(((i) >= nr_grant_frames(t)) ? INVALID_GFN : (t)->arch.shared_gfn[i])
+#define gnttab_shared_gfn(d, t, i)                                       \
+    (((i) >= nr_grant_frames(t)) ? INVALID_GFN : (t)->arch.shared_gfn[i])
 
-#define gnttab_status_gmfn(d, t, i)                                      \
-    gfn_x(((i) >= nr_status_frames(t)) ? INVALID_GFN : (t)->arch.status_gfn[i])
+#define gnttab_status_gfn(d, t, i)                                       \
+    (((i) >= nr_status_frames(t)) ? INVALID_GFN : (t)->arch.status_gfn[i])
 
 #define gnttab_need_iommu_mapping(d)                    \
     (is_domain_direct_mapped(d) && need_iommu_pt_sync(d))

diff --git a/xen/include/asm-x86/grant_table.h b/xen/include/asm-x86/grant_table.h
index 61c889b2970921afb38ab0aa2f9235f465c9e8d0..84e32960c034038f3b8bbba1d1d6dbb89da52246 100644 (file)
--- a/xen/include/asm-x86/grant_table.h
+++ b/xen/include/asm-x86/grant_table.h
@@ -39,24 +39,19 @@ static inline int replace_grant_host_mapping(uint64_t addr, mfn_t frame,
 #define gnttab_destroy_arch(gt) do {} while ( 0 )
 #define gnttab_set_frame_gfn(gt, st, idx, gfn) do {} while ( 0 )
 #define gnttab_get_frame_gfn(gt, st, idx) ({                             \
-    unsigned long mfn_ = (st) ? gnttab_status_mfn(gt, idx)               \
-                              : gnttab_shared_mfn(gt, idx);              \
-    unsigned long gpfn_ = get_gpfn_from_mfn(mfn_);                       \
+    mfn_t mfn_ = (st) ? gnttab_status_mfn(gt, idx)                       \
+                      : gnttab_shared_mfn(gt, idx);                      \
+    unsigned long gpfn_ = get_gpfn_from_mfn(mfn_x(mfn_));                \
     VALID_M2P(gpfn_) ? _gfn(gpfn_) : INVALID_GFN;                        \
 })
 
-#define gnttab_shared_mfn(t, i)                         \
-    ((virt_to_maddr((t)->shared_raw[i]) >> PAGE_SHIFT))
+#define gnttab_shared_mfn(t, i) _mfn(__virt_to_mfn((t)->shared_raw[i]))
 
-#define gnttab_shared_gmfn(d, t, i)                     \
-    (mfn_to_gmfn(d, gnttab_shared_mfn(t, i)))
+#define gnttab_shared_gfn(d, t, i) mfn_to_gfn(d, gnttab_shared_mfn(t, i))
 
+#define gnttab_status_mfn(t, i) _mfn(__virt_to_mfn((t)->status[i]))
 
-#define gnttab_status_mfn(t, i)                         \
-    ((virt_to_maddr((t)->status[i]) >> PAGE_SHIFT))
-
-#define gnttab_status_gmfn(d, t, i)                     \
-    (mfn_to_gmfn(d, gnttab_status_mfn(t, i)))
+#define gnttab_status_gfn(d, t, i) mfn_to_gfn(d, gnttab_status_mfn(t, i))
 
 #define gnttab_mark_dirty(d, f) paging_mark_dirty(d, f)