x86/paravirt/xen: properly fill out the ldt ops

[linux-2.6-omap-h63xx.git] / arch / x86 / xen / enlighten.c

diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index 9ff6e3cbf08feaf41c36d9a48c46ae45a105174e..06219e60e9c8a961e9374a8ee9cc14ad62fe1784 100644 (file)
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -325,6 +325,26 @@ static unsigned long xen_store_tr(void)
        return 0;
 }
 
+static void xen_alloc_ldt(struct desc_struct *ldt, unsigned entries)
+{
+       unsigned pages = roundup(entries * LDT_ENTRY_SIZE, PAGE_SIZE);
+       void *v = ldt;
+       int i;
+
+       for(i = 0; i < pages; i += PAGE_SIZE)
+               make_lowmem_page_readonly(v + i);
+}
+
+static void xen_free_ldt(struct desc_struct *ldt, unsigned entries)
+{
+       unsigned pages = roundup(entries * LDT_ENTRY_SIZE, PAGE_SIZE);
+       void *v = ldt;
+       int i;
+
+       for(i = 0; i < pages; i += PAGE_SIZE)
+               make_lowmem_page_readwrite(v + i);
+}
+
 static void xen_set_ldt(const void *addr, unsigned entries)
 {
        struct mmuext_op *op;
@@ -1220,6 +1240,9 @@ static const struct pv_cpu_ops xen_cpu_ops __initdata = {
        .load_gs_index = xen_load_gs_index,
 #endif
 
+       .alloc_ldt = xen_alloc_ldt,
+       .free_ldt = xen_free_ldt,
+
        .store_gdt = native_store_gdt,
        .store_idt = native_store_idt,
        .store_tr = xen_store_tr,