---

yaml
---
r: 215695
b: refs/heads/master
c: 2d4f567
h: refs/heads/master
i:
  215693: 5d7bd4b
  215691: b1c6f9e
  215687: 873d3d8
  215679: 54b6497
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: d1290b15e7f139e24150cc6e6d8e904214359e8a
+refs/heads/master: 2d4f567103ff5a931e773f2e356b4eb303115deb

trunk/arch/powerpc/kernel/kvm.c

@@ -65,6 +65,8 @@
 #define KVM_INST_TLBSYNC	0x7c00046c
 
 static bool kvm_patching_worked = true;
+static char kvm_tmp[1024 * 1024];
+static int kvm_tmp_index;
 
 static inline void kvm_patch_ins(u32 *inst, u32 new_inst)
 {
@@ -105,6 +107,23 @@ static void kvm_patch_ins_nop(u32 *inst)
 	kvm_patch_ins(inst, KVM_INST_NOP);
 }
 
+static u32 *kvm_alloc(int len)
+{
+	u32 *p;
+
+	if ((kvm_tmp_index + len) > ARRAY_SIZE(kvm_tmp)) {
+		printk(KERN_ERR "KVM: No more space (%d + %d)\n",
+				kvm_tmp_index, len);
+		kvm_patching_worked = false;
+		return NULL;
+	}
+
+	p = (void*)&kvm_tmp[kvm_tmp_index];
+	kvm_tmp_index += len;
+
+	return p;
+}
+
 static void kvm_map_magic_page(void *data)
 {
 	kvm_hypercall2(KVM_HC_PPC_MAP_MAGIC_PAGE,
@@ -270,17 +289,36 @@ static int kvm_para_setup(void)
 	return 0;
 }
 
+static __init void kvm_free_tmp(void)
+{
+	unsigned long start, end;
+
+	start = (ulong)&kvm_tmp[kvm_tmp_index + (PAGE_SIZE - 1)] & PAGE_MASK;
+	end = (ulong)&kvm_tmp[ARRAY_SIZE(kvm_tmp)] & PAGE_MASK;
+
+	/* Free the tmp space we don't need */
+	for (; start < end; start += PAGE_SIZE) {
+		ClearPageReserved(virt_to_page(start));
+		init_page_count(virt_to_page(start));
+		free_page(start);
+		totalram_pages++;
+	}
+}
+
 static int __init kvm_guest_init(void)
 {
 	if (!kvm_para_available())
-		return 0;
+		goto free_tmp;
 
 	if (kvm_para_setup())
-		return 0;
+		goto free_tmp;
 
 	if (kvm_para_has_feature(KVM_FEATURE_MAGIC_PAGE))
 		kvm_use_magic_page();
 
+free_tmp:
+	kvm_free_tmp();
+
 	return 0;
 }