[Xen-devel] [PATCH 1/3] x86/mm: Replace opencoded forms of l?e_{get, from}_page()

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

No functional change (confirmed by diffing the disassembly).

Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
---
CC: Jan Beulich <JBeulich@xxxxxxxx>
CC: Wei Liu <wei.liu2@xxxxxxxxxx>
CC: Tim Deegan <tim@xxxxxxx>
CC: George Dunlap <george.dunlap@xxxxxxxxxxxxx>
---
 xen/arch/x86/mm.c         |  7 +++----
 xen/arch/x86/mm/hap/hap.c |  3 +--
 xen/arch/x86/mm/p2m-pt.c  | 11 ++++-------
 3 files changed, 8 insertions(+), 13 deletions(-)

diff --git a/xen/arch/x86/mm.c b/xen/arch/x86/mm.c
index ed77270..e6b7829 100644
--- a/xen/arch/x86/mm.c
+++ b/xen/arch/x86/mm.c
@@ -692,8 +692,7 @@ int map_ldt_shadow_page(unsigned int off)
         return 0;
     }
 
-    nl1e = l1e_from_pfn(mfn_x(page_to_mfn(page)),
-                        l1e_get_flags(l1e) | _PAGE_RW);
+    nl1e = l1e_from_page(page, l1e_get_flags(l1e) | _PAGE_RW);
 
     spin_lock(&v->arch.pv_vcpu.shadow_ldt_lock);
     l1e_write(&gdt_ldt_ptes(d, v)[off + 16], nl1e);
@@ -1315,7 +1314,7 @@ static int put_page_from_l2e(l2_pgentry_t l2e, unsigned 
long pfn)
 
     if ( l2e_get_flags(l2e) & _PAGE_PSE )
     {
-        struct page_info *page = mfn_to_page(_mfn(l2e_get_pfn(l2e)));
+        struct page_info *page = l2e_get_page(l2e);
         unsigned int i;
 
         for ( i = 0; i < (1u << PAGETABLE_ORDER); i++, page++ )
@@ -1944,7 +1943,7 @@ static int mod_l1_entry(l1_pgentry_t *pl1e, l1_pgentry_t 
nl1e,
             page = get_page_from_gfn(pg_dom, l1e_get_pfn(nl1e), NULL, 
P2M_ALLOC);
             if ( !page )
                 return -EINVAL;
-            nl1e = l1e_from_pfn(mfn_x(page_to_mfn(page)), l1e_get_flags(nl1e));
+            nl1e = l1e_from_page(page, l1e_get_flags(nl1e));
         }
 
         /* Fast path for sufficiently-similar mappings. */
diff --git a/xen/arch/x86/mm/hap/hap.c b/xen/arch/x86/mm/hap/hap.c
index cdc77a9..027ab8f 100644
--- a/xen/arch/x86/mm/hap/hap.c
+++ b/xen/arch/x86/mm/hap/hap.c
@@ -405,8 +405,7 @@ static void hap_install_xen_entries_in_l4(struct vcpu *v, 
mfn_t l4mfn)
 
     /* Install the per-domain mappings for this domain */
     l4e[l4_table_offset(PERDOMAIN_VIRT_START)] =
-        l4e_from_pfn(mfn_x(page_to_mfn(d->arch.perdomain_l3_pg)),
-                     __PAGE_HYPERVISOR_RW);
+        l4e_from_page(d->arch.perdomain_l3_pg, __PAGE_HYPERVISOR_RW);
 
     /* Install a linear mapping */
     l4e[l4_table_offset(LINEAR_PT_VIRT_START)] =
diff --git a/xen/arch/x86/mm/p2m-pt.c b/xen/arch/x86/mm/p2m-pt.c
index 06e64b8..628a53e 100644
--- a/xen/arch/x86/mm/p2m-pt.c
+++ b/xen/arch/x86/mm/p2m-pt.c
@@ -168,7 +168,7 @@ p2m_free_entry(struct p2m_domain *p2m, l1_pgentry_t 
*p2m_entry, int page_order)
         unmap_domain_page(l3_table);
     }
 
-    p2m_free_ptp(p2m, mfn_to_page(_mfn(l1e_get_pfn(*p2m_entry))));
+    p2m_free_ptp(p2m, l1e_get_page(*p2m_entry));
 }
 
 // Walk one level of the P2M table, allocating a new table if required.
@@ -210,8 +210,7 @@ p2m_next_level(struct p2m_domain *p2m, void **table,
         if ( pg == NULL )
             return -ENOMEM;
 
-        new_entry = l1e_from_pfn(mfn_x(page_to_mfn(pg)),
-                                 P2M_BASE_FLAGS | _PAGE_RW);
+        new_entry = l1e_from_page(pg, P2M_BASE_FLAGS | _PAGE_RW);
 
         switch ( type ) {
         case PGT_l3_page_table:
@@ -255,8 +254,7 @@ p2m_next_level(struct p2m_domain *p2m, void **table,
             p2m->write_p2m_entry(p2m, gfn, l1_entry + i, new_entry, 2);
         }
         unmap_domain_page(l1_entry);
-        new_entry = l1e_from_pfn(mfn_x(page_to_mfn(pg)),
-                                 P2M_BASE_FLAGS | _PAGE_RW); /* disable PSE */
+        new_entry = l1e_from_page(pg, P2M_BASE_FLAGS | _PAGE_RW); /* disable 
PSE */
         p2m_add_iommu_flags(&new_entry, 2, IOMMUF_readable|IOMMUF_writable);
         p2m->write_p2m_entry(p2m, gfn, p2m_entry, new_entry, 3);
     }
@@ -290,8 +288,7 @@ p2m_next_level(struct p2m_domain *p2m, void **table,
         }
         unmap_domain_page(l1_entry);
         
-        new_entry = l1e_from_pfn(mfn_x(page_to_mfn(pg)),
-                                 P2M_BASE_FLAGS | _PAGE_RW);
+        new_entry = l1e_from_page(pg, P2M_BASE_FLAGS | _PAGE_RW);
         p2m_add_iommu_flags(&new_entry, 1, IOMMUF_readable|IOMMUF_writable);
         p2m->write_p2m_entry(p2m, gfn, p2m_entry, new_entry, 2);
     }
-- 
2.1.4


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