Merge branch 'stable/for-linus-fixes-3.2' of git://git.kernel.org/pub/scm/linux/kerne...

* 'stable/for-linus-fixes-3.2' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen:
  xen/swiotlb: Use page alignment for early buffer allocation.
  xen: only limit memory map to maximum reservation for domain 0.

diff --git a/arch/x86/xen/setup.c b/arch/x86/xen/setup.c
index 1093f80c162d24e5e455d760a5b77e1b16f800c5..b2c7179fa26343d5cedfb7846d2f1b92ceb97390 100644 (file)
--- a/arch/x86/xen/setup.c
+++ b/arch/x86/xen/setup.c
@@ -173,9 +173,21 @@ static unsigned long __init xen_get_max_pages(void)
        domid_t domid = DOMID_SELF;
        int ret;
 
-       ret = HYPERVISOR_memory_op(XENMEM_maximum_reservation, &domid);
-       if (ret > 0)
-               max_pages = ret;
+       /*
+        * For the initial domain we use the maximum reservation as
+        * the maximum page.
+        *
+        * For guest domains the current maximum reservation reflects
+        * the current maximum rather than the static maximum. In this
+        * case the e820 map provided to us will cover the static
+        * maximum region.
+        */
+       if (xen_initial_domain()) {
+               ret = HYPERVISOR_memory_op(XENMEM_maximum_reservation, &domid);
+               if (ret > 0)
+                       max_pages = ret;
+       }
+
        return min(max_pages, MAX_DOMAIN_PAGES);
 }
 

diff --git a/drivers/xen/swiotlb-xen.c b/drivers/xen/swiotlb-xen.c
index 8e964b91c447b117b7d4d17731201254a79365d5..284798aaf8b1391fd8d4de7e43bff52e5721272d 100644 (file)
--- a/drivers/xen/swiotlb-xen.c
+++ b/drivers/xen/swiotlb-xen.c
@@ -166,7 +166,7 @@ retry:
        /*
         * Get IO TLB memory from any location.
         */
-       xen_io_tlb_start = alloc_bootmem(bytes);
+       xen_io_tlb_start = alloc_bootmem_pages(PAGE_ALIGN(bytes));
        if (!xen_io_tlb_start) {
                m = "Cannot allocate Xen-SWIOTLB buffer!\n";
                goto error;
@@ -179,7 +179,7 @@ retry:
                               bytes,
                               xen_io_tlb_nslabs);
        if (rc) {
-               free_bootmem(__pa(xen_io_tlb_start), bytes);
+               free_bootmem(__pa(xen_io_tlb_start), PAGE_ALIGN(bytes));
                m = "Failed to get contiguous memory for DMA from Xen!\n"\
                    "You either: don't have the permissions, do not have"\
                    " enough free memory under 4GB, or the hypervisor memory"\