[PATCH v2 2/4] xen/arm: drop MAX_PAGES_PER_VCPU

[Oleksii Kurochko <oleksii.kurochko@xxxxxxxxx>]

Now that the size of struct vcpu is smaller than PAGE_SIZE,
MAX_PAGES_PER_VCPU is no longer needed and is removed.

This change also updates {alloc,free}_vcpu_struct().

Signed-off-by: Oleksii Kurochko <oleksii.kurochko@xxxxxxxxx>
---
Changes in v2:
 - New patch.
---
 xen/arch/arm/domain.c | 25 +++++--------------------
 1 file changed, 5 insertions(+), 20 deletions(-)

diff --git a/xen/arch/arm/domain.c b/xen/arch/arm/domain.c
index 47973f99d9..e566023340 100644
--- a/xen/arch/arm/domain.c
+++ b/xen/arch/arm/domain.c
@@ -473,36 +473,21 @@ void dump_pageframe_info(struct domain *d)
 
 }
 
-/*
- * The new VGIC has a bigger per-IRQ structure, so we need more than one
- * page on ARM64. Cowardly increase the limit in this case.
- */
-#if defined(CONFIG_NEW_VGIC) && defined(CONFIG_ARM_64)
-#define MAX_PAGES_PER_VCPU  2
-#else
-#define MAX_PAGES_PER_VCPU  1
-#endif
-
 struct vcpu *alloc_vcpu_struct(const struct domain *d)
 {
     struct vcpu *v;
 
-    BUILD_BUG_ON(sizeof(*v) > MAX_PAGES_PER_VCPU * PAGE_SIZE);
-    v = alloc_xenheap_pages(get_order_from_bytes(sizeof(*v)), 0);
-    if ( v != NULL )
-    {
-        unsigned int i;
-
-        for ( i = 0; i < DIV_ROUND_UP(sizeof(*v), PAGE_SIZE); i++ )
-            clear_page((void *)v + i * PAGE_SIZE);
-    }
+    BUILD_BUG_ON(sizeof(*v) > PAGE_SIZE);
+    v = alloc_xenheap_pages(0, 0);
+    if ( v )
+        clear_page(v);
 
     return v;
 }
 
 void free_vcpu_struct(struct vcpu *v)
 {
-    free_xenheap_pages(v, get_order_from_bytes(sizeof(*v)));
+    free_xenheap_page(v);
 }
 
 int arch_vcpu_create(struct vcpu *v)
-- 
2.52.0