[PATCH v4 02/31] x86/mm: carve out replace_grant_pv_mapping

[Wei Liu <wei.liu2@citrix.com>]

And at once make it an inline function. Add declarations of
replace_grant_{hvm,pv}_mapping to respective header files.

The code movement will be done later.

Signed-off-by: Wei Liu <wei.liu2@citrix.com>
---
 xen/arch/x86/mm.c                     |  9 +++------
 xen/include/asm-x86/grant_table.h     | 10 ++++++++--
 xen/include/asm-x86/hvm/grant_table.h |  8 ++++++++
 xen/include/asm-x86/pv/grant_table.h  |  8 ++++++++
 4 files changed, 27 insertions(+), 8 deletions(-)

diff --git a/xen/arch/x86/mm.c b/xen/arch/x86/mm.c
index 28bcff2c99..d7d04772c5 100644
--- a/xen/arch/x86/mm.c
+++ b/xen/arch/x86/mm.c
@@ -4068,7 +4068,7 @@ int create_grant_pv_mapping(uint64_t addr, unsigned long frame,
     return create_grant_va_mapping(addr, pte, current);
 }
 
-static int replace_grant_p2m_mapping(
+int replace_grant_p2m_mapping(
     uint64_t addr, unsigned long frame, uint64_t new_addr, unsigned int flags)
 {
     unsigned long gfn = (unsigned long)(addr >> PAGE_SHIFT);
@@ -4098,8 +4098,8 @@ static int replace_grant_p2m_mapping(
     return GNTST_okay;
 }
 
-int replace_grant_host_mapping(
-    uint64_t addr, unsigned long frame, uint64_t new_addr, unsigned int flags)
+int replace_grant_pv_mapping(uint64_t addr, unsigned long frame,
+                             uint64_t new_addr, unsigned int flags)
 {
     struct vcpu *curr = current;
     l1_pgentry_t *pl1e, ol1e;
@@ -4107,9 +4107,6 @@ int replace_grant_host_mapping(
     struct page_info *l1pg;
     int rc;
 
-    if ( paging_mode_external(current->domain) )
-        return replace_grant_p2m_mapping(addr, frame, new_addr, flags);
-
     if ( flags & GNTMAP_contains_pte )
     {
         if ( !new_addr )
diff --git a/xen/include/asm-x86/grant_table.h b/xen/include/asm-x86/grant_table.h
index 559ad2f275..33b2f88b96 100644
--- a/xen/include/asm-x86/grant_table.h
+++ b/xen/include/asm-x86/grant_table.h
@@ -27,8 +27,14 @@ static inline int create_grant_host_mapping(uint64_t addr, unsigned long frame,
     return create_grant_pv_mapping(addr, frame, flags, cache_flags);
 }
 
-int replace_grant_host_mapping(
-    uint64_t addr, unsigned long frame, uint64_t new_addr, unsigned int flags);
+static inline int replace_grant_host_mapping(uint64_t addr, unsigned long frame,
+                                             uint64_t new_addr,
+                                             unsigned int flags)
+{
+    if ( paging_mode_external(current->domain) )
+        return replace_grant_p2m_mapping(addr, frame, new_addr, flags);
+    return replace_grant_pv_mapping(addr, frame, new_addr, flags);
+}
 
 #define gnttab_create_shared_page(d, t, i)                               \
     do {                                                                 \
diff --git a/xen/include/asm-x86/hvm/grant_table.h b/xen/include/asm-x86/hvm/grant_table.h
index 83202c219c..4b1afa179b 100644
--- a/xen/include/asm-x86/hvm/grant_table.h
+++ b/xen/include/asm-x86/hvm/grant_table.h
@@ -26,6 +26,8 @@
 int create_grant_p2m_mapping(uint64_t addr, unsigned long frame,
                              unsigned int flags,
                              unsigned int cache_flags);
+int replace_grant_p2m_mapping(uint64_t addr, unsigned long frame,
+                              uint64_t new_addr, unsigned int flags);
 
 #else
 
@@ -38,6 +40,12 @@ static inline int create_grant_p2m_mapping(uint64_t addr, unsigned long frame,
     return GNTST_general_error;
 }
 
+int replace_grant_p2m_mapping(uint64_t addr, unsigned long frame,
+                              uint64_t new_addr, unsigned int flags)
+{
+    return GNTST_general_error;
+}
+
 #endif
 
 #endif /* __X86_HVM_GRANT_TABLE_H__ */
diff --git a/xen/include/asm-x86/pv/grant_table.h b/xen/include/asm-x86/pv/grant_table.h
index 165ebce22f..c6474973cd 100644
--- a/xen/include/asm-x86/pv/grant_table.h
+++ b/xen/include/asm-x86/pv/grant_table.h
@@ -25,6 +25,8 @@
 
 int create_grant_pv_mapping(uint64_t addr, unsigned long frame,
                             unsigned int flags, unsigned int cache_flags);
+int replace_grant_pv_mapping(uint64_t addr, unsigned long frame,
+                             uint64_t new_addr, unsigned int flags);
 
 #else
 
@@ -37,6 +39,12 @@ static inline int create_grant_pv_mapping(uint64_t addr, unsigned long frame,
     return GNTST_general_error;
 }
 
+int replace_grant_pv_mapping(uint64_t addr, unsigned long frame,
+                             uint64_t new_addr, unsigned int flags)
+{
+    return GNTST_general_error;
+}
+
 #endif
 
 #endif /* __X86_PV_GRANT_TABLE_H__ */
-- 
2.11.0


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