From: Keir Fraser <keir.fraser@citrix.com>
Date: Thu, 12 Jun 2008 14:47:45 +0000 (+0100)
Subject: x86: simplify domain memory cleanup
X-Git-Tag: archive/raspbian/4.8.0-1+rpi1~1^2~14192^2~90
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=cad1e62bf1cdbf8ad20689cbb000dd59b9ff1dc7;p=xen.git

x86: simplify domain memory cleanup

Page table pages cannot come from the Xen heap, so there's no need to
special-case these during cleanup.

Signed-off-by: Jan Beulich <jbeulich@novell.com>
---

diff --git a/xen/arch/x86/domain.c b/xen/arch/x86/domain.c
index 6bc9ccc48d..81c5ab6319 100644
--- a/xen/arch/x86/domain.c
+++ b/xen/arch/x86/domain.c
@@ -1776,47 +1776,36 @@ int domain_relinquish_resources(struct domain *d)
             unmap_vcpu_info(v);
         }
 
-        d->arch.relmem = RELMEM_xen_l4;
+        d->arch.relmem = RELMEM_xen;
         /* fallthrough */
 
         /* Relinquish every page of memory. */
-    case RELMEM_xen_l4:
-#if CONFIG_PAGING_LEVELS >= 4
-        ret = relinquish_memory(d, &d->xenpage_list, PGT_l4_page_table);
+    case RELMEM_xen:
+        ret = relinquish_memory(d, &d->xenpage_list, ~0UL);
         if ( ret )
             return ret;
-        d->arch.relmem = RELMEM_dom_l4;
+#if CONFIG_PAGING_LEVELS >= 4
+        d->arch.relmem = RELMEM_l4;
         /* fallthrough */
-    case RELMEM_dom_l4:
+
+    case RELMEM_l4:
         ret = relinquish_memory(d, &d->page_list, PGT_l4_page_table);
         if ( ret )
             return ret;
-        d->arch.relmem = RELMEM_xen_l3;
-        /* fallthrough */
 #endif
-
-    case RELMEM_xen_l3:
 #if CONFIG_PAGING_LEVELS >= 3
-        ret = relinquish_memory(d, &d->xenpage_list, PGT_l3_page_table);
-        if ( ret )
-            return ret;
-        d->arch.relmem = RELMEM_dom_l3;
+        d->arch.relmem = RELMEM_l3;
         /* fallthrough */
-    case RELMEM_dom_l3:
+
+    case RELMEM_l3:
         ret = relinquish_memory(d, &d->page_list, PGT_l3_page_table);
         if ( ret )
             return ret;
-        d->arch.relmem = RELMEM_xen_l2;
-        /* fallthrough */
 #endif
-
-    case RELMEM_xen_l2:
-        ret = relinquish_memory(d, &d->xenpage_list, PGT_l2_page_table);
-        if ( ret )
-            return ret;
-        d->arch.relmem = RELMEM_dom_l2;
+        d->arch.relmem = RELMEM_l2;
         /* fallthrough */
-    case RELMEM_dom_l2:
+
+    case RELMEM_l2:
         ret = relinquish_memory(d, &d->page_list, PGT_l2_page_table);
         if ( ret )
             return ret;
@@ -1829,6 +1818,7 @@ int domain_relinquish_resources(struct domain *d)
         if ( ret )
             return ret;
 #endif
+        WARN_ON(d->xenheap_pages);
         break;
 
     default:
diff --git a/xen/arch/x86/mm.c b/xen/arch/x86/mm.c
index 5216f263f1..9ab765da86 100644
--- a/xen/arch/x86/mm.c
+++ b/xen/arch/x86/mm.c
@@ -1317,7 +1317,7 @@ static void free_l3_table(struct page_info *page)
     int           i;
 
 #ifdef DOMAIN_DESTRUCT_AVOID_RECURSION
-    if ( d->arch.relmem == RELMEM_dom_l3 )
+    if ( d->arch.relmem == RELMEM_l3 )
         return;
 #endif
 
@@ -1345,7 +1345,7 @@ static void free_l4_table(struct page_info *page)
     int           i;
 
 #ifdef DOMAIN_DESTRUCT_AVOID_RECURSION
-    if ( d->arch.relmem == RELMEM_dom_l4 )
+    if ( d->arch.relmem == RELMEM_l4 )
         return;
 #endif
 
diff --git a/xen/include/asm-x86/domain.h b/xen/include/asm-x86/domain.h
index a47b628c1b..746e6e221c 100644
--- a/xen/include/asm-x86/domain.h
+++ b/xen/include/asm-x86/domain.h
@@ -241,12 +241,10 @@ struct arch_domain
     /* Continuable domain_relinquish_resources(). */
     enum {
         RELMEM_not_started,
-        RELMEM_xen_l4,
-        RELMEM_dom_l4,
-        RELMEM_xen_l3,
-        RELMEM_dom_l3,
-        RELMEM_xen_l2,
-        RELMEM_dom_l2,
+        RELMEM_xen,
+        RELMEM_l4,
+        RELMEM_l3,
+        RELMEM_l2,
         RELMEM_done,
     } relmem;
     struct list_head relmem_list;