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authorYinghai Lu <yhlu.kernel@gmail.com>2008-06-23 04:40:10 +0400
committerIngo Molnar <mingo@elte.hu>2008-07-08 14:50:19 +0400
commitbef1568d9714f1162086c32583ba7984a7ca8e3e (patch)
tree84cd1f6f1c5637cb3d22f66fa7fc51db4ae4a089 /arch/x86/mm/pgtable_32.c
parent90d967e0ef68f5312ed4b081d5c9312ff53c1c93 (diff)
downloadlinux-bef1568d9714f1162086c32583ba7984a7ca8e3e.tar.xz
x86: move reservetop and vmalloc parsing to pgtable_32.c
also change reserve_top_address to __init attibute Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/mm/pgtable_32.c')
-rw-r--r--arch/x86/mm/pgtable_32.c35
1 files changed, 34 insertions, 1 deletions
diff --git a/arch/x86/mm/pgtable_32.c b/arch/x86/mm/pgtable_32.c
index 0662f345212f..828907d001e8 100644
--- a/arch/x86/mm/pgtable_32.c
+++ b/arch/x86/mm/pgtable_32.c
@@ -152,7 +152,7 @@ EXPORT_SYMBOL(__FIXADDR_TOP);
* Can be used to relocate the fixmap area and poke a hole in the top
* of kernel address space to make room for a hypervisor.
*/
-void reserve_top_address(unsigned long reserve)
+void __init reserve_top_address(unsigned long reserve)
{
BUG_ON(fixmaps_set > 0);
printk(KERN_INFO "Reserving virtual address space above 0x%08x\n",
@@ -160,3 +160,36 @@ void reserve_top_address(unsigned long reserve)
__FIXADDR_TOP = -reserve - PAGE_SIZE;
__VMALLOC_RESERVE += reserve;
}
+
+/*
+ * vmalloc=size forces the vmalloc area to be exactly 'size'
+ * bytes. This can be used to increase (or decrease) the
+ * vmalloc area - the default is 128m.
+ */
+static int __init parse_vmalloc(char *arg)
+{
+ if (!arg)
+ return -EINVAL;
+
+ __VMALLOC_RESERVE = memparse(arg, &arg);
+ return 0;
+}
+early_param("vmalloc", parse_vmalloc);
+
+/*
+ * reservetop=size reserves a hole at the top of the kernel address space which
+ * a hypervisor can load into later. Needed for dynamically loaded hypervisors,
+ * so relocating the fixmap can be done before paging initialization.
+ */
+static int __init parse_reservetop(char *arg)
+{
+ unsigned long address;
+
+ if (!arg)
+ return -EINVAL;
+
+ address = memparse(arg, &arg);
+ reserve_top_address(address);
+ return 0;
+}
+early_param("reservetop", parse_reservetop);