x86/mtrr: move is_var_mtrr_overlapped

Move it to x86 generic code. While at it, use proper boolean type and
fix some cosmetic issues.

Signed-off-by: Wei Liu <wei.liu2@citrix.com>
Acked-by: Jan Beulich <jbeulich@suse.com>

xen/arch/x86/cpu/mtrr/generic.c

@@ -51,6 +51,38 @@ get_fixed_ranges(mtrr_type * frs)
 	}
 }
 
+bool is_var_mtrr_overlapped(const struct mtrr_state *m)
+{
+    unsigned int seg, i;
+    unsigned int num_var_ranges = MASK_EXTR(m->mtrr_cap, MTRRcap_VCNT);
+
+    for ( i = 0; i < num_var_ranges; i++ )
+    {
+        uint64_t base1 = m->var_ranges[i].base >> PAGE_SHIFT;
+        uint64_t mask1 = m->var_ranges[i].mask >> PAGE_SHIFT;
+
+        if ( !(m->var_ranges[i].mask & MTRR_PHYSMASK_VALID) )
+            continue;
+
+        for ( seg = i + 1; seg < num_var_ranges; seg++ )
+        {
+            uint64_t base2 = m->var_ranges[seg].base >> PAGE_SHIFT;
+            uint64_t mask2 = m->var_ranges[seg].mask >> PAGE_SHIFT;
+
+            if ( !(m->var_ranges[seg].mask & MTRR_PHYSMASK_VALID) )
+                continue;
+
+            if ( (base1 & mask1 & mask2) == (base2 & mask2 & mask1) )
+            {
+                /* MTRRs overlap. */
+                return true;
+            }
+        }
+    }
+
+    return false;
+}
+
 void mtrr_save_fixed_ranges(void *info)
 {
 	get_fixed_ranges(mtrr_state.fixed_ranges);

xen/arch/x86/hvm/mtrr.c

@@ -75,37 +75,6 @@ static uint8_t __read_mostly mtrr_epat_tbl[MTRR_NUM_TYPES][MEMORY_NUM_TYPES] =
 static uint8_t __read_mostly pat_entry_tbl[PAT_TYPE_NUMS] =
     { [0 ... PAT_TYPE_NUMS-1] = INVALID_MEM_TYPE };
 
-bool_t is_var_mtrr_overlapped(const struct mtrr_state *m)
-{
-    unsigned int seg, i;
-    unsigned int num_var_ranges = MASK_EXTR(m->mtrr_cap, MTRRcap_VCNT);
-
-    for ( i = 0; i < num_var_ranges; i++ )
-    {
-        uint64_t base1 = m->var_ranges[i].base >> PAGE_SHIFT;
-        uint64_t mask1 = m->var_ranges[i].mask >> PAGE_SHIFT;
-
-        if ( !(m->var_ranges[i].mask & MTRR_PHYSMASK_VALID) )
-            continue;
-
-        for ( seg = i + 1; seg < num_var_ranges; seg ++ )
-        {
-            uint64_t base2 = m->var_ranges[seg].base >> PAGE_SHIFT;
-            uint64_t mask2 = m->var_ranges[seg].mask >> PAGE_SHIFT;
-
-            if ( !(m->var_ranges[seg].mask & MTRR_PHYSMASK_VALID) )
-                continue;
-
-            if ( (base1 & mask1 & mask2) == (base2 & mask2 & mask1) )
-            {
-                /* MTRR is overlapped. */
-                return 1;
-            }
-        }
-    }
-    return 0;
-}
-
 static int __init hvm_mtrr_pat_init(void)
 {
     unsigned int i, j;

xen/include/asm-x86/mtrr.h

@@ -95,7 +95,7 @@ extern bool_t mtrr_def_type_msr_set(struct domain *, struct mtrr_state *,
 extern void memory_type_changed(struct domain *);
 extern bool_t pat_msr_set(uint64_t *pat, uint64_t msr);
 
-bool_t is_var_mtrr_overlapped(const struct mtrr_state *m);
+bool is_var_mtrr_overlapped(const struct mtrr_state *m);
 bool mtrr_pat_not_equal(const struct vcpu *vd, const struct vcpu *vs);
 
 #endif /* __ASM_X86_MTRR_H__ */