9 files changed, 63 insertions, 10 deletions

diff --git a/drivers/xen/Makefile b/drivers/xen/Makefile
index 275abfc615cb..0e8637035457 100644
--- a/drivers/xen/Makefile
+++ b/drivers/xen/Makefile
@@ -9,6 +9,7 @@ nostackp := $(call cc-option, -fno-stack-protector)
 CFLAGS_features.o                       := $(nostackp)
 
 dom0-$(CONFIG_PCI) += pci.o
+dom0-$(CONFIG_USB_SUPPORT) += dbgp.o
 dom0-$(CONFIG_ACPI) += acpi.o
 dom0-$(CONFIG_X86) += pcpu.o
 obj-$(CONFIG_XEN_DOM0)                  += $(dom0-y)
diff --git a/drivers/xen/dbgp.c b/drivers/xen/dbgp.c
new file mode 100644
index 000000000000..42569c77ccc8
--- /dev/null
+++ b/drivers/xen/dbgp.c
@@ -0,0 +1,48 @@
+#include <linux/pci.h>
+#include <linux/usb.h>
+#include <linux/usb/ehci_def.h>
+#include <linux/usb/hcd.h>
+#include <asm/xen/hypercall.h>
+#include <xen/interface/physdev.h>
+#include <xen/xen.h>
+
+static int xen_dbgp_op(struct usb_hcd *hcd, int op)
+{
+        const struct device *ctrlr = hcd_to_bus(hcd)->controller;
+        struct physdev_dbgp_op dbgp;
+
+        if (!xen_initial_domain())
+                return 0;
+
+        dbgp.op = op;
+
+#ifdef CONFIG_PCI
+        if (ctrlr->bus == &pci_bus_type) {
+                const struct pci_dev *pdev = to_pci_dev(ctrlr);
+
+                dbgp.u.pci.seg = pci_domain_nr(pdev->bus);
+                dbgp.u.pci.bus = pdev->bus->number;
+                dbgp.u.pci.devfn = pdev->devfn;
+                dbgp.bus = PHYSDEVOP_DBGP_BUS_PCI;
+        } else
+#endif
+                dbgp.bus = PHYSDEVOP_DBGP_BUS_UNKNOWN;
+
+        return HYPERVISOR_physdev_op(PHYSDEVOP_dbgp_op, &dbgp);
+}
+
+int xen_dbgp_reset_prep(struct usb_hcd *hcd)
+{
+        return xen_dbgp_op(hcd, PHYSDEVOP_DBGP_RESET_PREPARE);
+}
+
+int xen_dbgp_external_startup(struct usb_hcd *hcd)
+{
+        return xen_dbgp_op(hcd, PHYSDEVOP_DBGP_RESET_DONE);
+}
+
+#ifndef CONFIG_EARLY_PRINTK_DBGP
+#include <linux/export.h>
+EXPORT_SYMBOL_GPL(xen_dbgp_reset_prep);
+EXPORT_SYMBOL_GPL(xen_dbgp_external_startup);
+#endif
diff --git a/drivers/xen/gntalloc.c b/drivers/xen/gntalloc.c
index 934985d14c24..4097987b330e 100644
--- a/drivers/xen/gntalloc.c
+++ b/drivers/xen/gntalloc.c
@@ -535,7 +535,7 @@ static int gntalloc_mmap(struct file *filp, struct vm_area_struct *vma)
 
         vma->vm_private_data = vm_priv;
 
-        vma->vm_flags |= VM_RESERVED | VM_DONTEXPAND;
+        vma->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
 
         vma->vm_ops = &gntalloc_vmops;
 
diff --git a/drivers/xen/gntdev.c b/drivers/xen/gntdev.c
index 163b7e985ed0..610bfc6be177 100644
--- a/drivers/xen/gntdev.c
+++ b/drivers/xen/gntdev.c
@@ -314,8 +314,9 @@ static int __unmap_grant_pages(struct grant_map *map, int offset, int pages)
                 }
         }
 
-        err = gnttab_unmap_refs(map->unmap_ops + offset, map->pages + offset,
-                                pages, true);
+        err = gnttab_unmap_refs(map->unmap_ops + offset,
+                        use_ptemod ? map->kmap_ops + offset : NULL, map->pages + offset,
+                        pages);
         if (err)
                 return err;
 
@@ -719,7 +720,7 @@ static int gntdev_mmap(struct file *flip, struct vm_area_struct *vma)
 
         vma->vm_ops = &gntdev_vmops;
 
-        vma->vm_flags |= VM_RESERVED|VM_DONTEXPAND;
+        vma->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
 
         if (use_ptemod)
                 vma->vm_flags |= VM_DONTCOPY;
diff --git a/drivers/xen/grant-table.c b/drivers/xen/grant-table.c
index 3a567b15600b..b2b0a375b348 100644
--- a/drivers/xen/grant-table.c
+++ b/drivers/xen/grant-table.c
@@ -923,7 +923,8 @@ int gnttab_map_refs(struct gnttab_map_grant_ref *map_ops,
 EXPORT_SYMBOL_GPL(gnttab_map_refs);
 
 int gnttab_unmap_refs(struct gnttab_unmap_grant_ref *unmap_ops,
-                      struct page **pages, unsigned int count, bool clear_pte)
+                      struct gnttab_map_grant_ref *kmap_ops,
+                      struct page **pages, unsigned int count)
 {
         int i, ret;
         bool lazy = false;
@@ -941,7 +942,8 @@ int gnttab_unmap_refs(struct gnttab_unmap_grant_ref *unmap_ops,
         }
 
         for (i = 0; i < count; i++) {
-                ret = m2p_remove_override(pages[i], clear_pte);
+                ret = m2p_remove_override(pages[i], kmap_ops ?
+                                       &kmap_ops[i] : NULL);
                 if (ret)
                         return ret;
         }
diff --git a/drivers/xen/privcmd.c b/drivers/xen/privcmd.c
index ef6389580b8c..8adb9cc267f9 100644
--- a/drivers/xen/privcmd.c
+++ b/drivers/xen/privcmd.c
@@ -455,7 +455,8 @@ static int privcmd_mmap(struct file *file, struct vm_area_struct *vma)
 {
         /* DONTCOPY is essential for Xen because copy_page_range doesn't know
          * how to recreate these mappings */
-        vma->vm_flags |= VM_RESERVED | VM_IO | VM_DONTCOPY | VM_PFNMAP;
+        vma->vm_flags |= VM_IO | VM_PFNMAP | VM_DONTCOPY |
+                         VM_DONTEXPAND | VM_DONTDUMP;
         vma->vm_ops = &privcmd_vm_ops;
         vma->vm_private_data = NULL;
 
diff --git a/drivers/xen/xen-acpi-processor.c b/drivers/xen/xen-acpi-processor.c
index b590ee067fcd..316df65163cf 100644
--- a/drivers/xen/xen-acpi-processor.c
+++ b/drivers/xen/xen-acpi-processor.c
@@ -98,7 +98,6 @@ static int push_cxx_to_hypervisor(struct acpi_processor *_pr)
 
                 dst_cx->type = cx->type;
                 dst_cx->latency = cx->latency;
-                dst_cx->power = cx->power;
 
                 dst_cx->dpcnt = 0;
                 set_xen_guest_handle(dst_cx->dp, NULL);
diff --git a/drivers/xen/xen-pciback/pci_stub.c b/drivers/xen/xen-pciback/pci_stub.c
index e5a0c13e2ad4..961d664e2d2f 100644
--- a/drivers/xen/xen-pciback/pci_stub.c
+++ b/drivers/xen/xen-pciback/pci_stub.c
@@ -872,7 +872,7 @@ end:
 }
 
 /*add xen_pcibk AER handling*/
-static struct pci_error_handlers xen_pcibk_error_handler = {
+static const struct pci_error_handlers xen_pcibk_error_handler = {
         .error_detected = xen_pcibk_error_detected,
         .mmio_enabled = xen_pcibk_mmio_enabled,
         .slot_reset = xen_pcibk_slot_reset,
diff --git a/drivers/xen/xenfs/super.c b/drivers/xen/xenfs/super.c
index a84b53c01436..459b9ac45cf5 100644
--- a/drivers/xen/xenfs/super.c
+++ b/drivers/xen/xenfs/super.c
@@ -30,7 +30,8 @@ static struct inode *xenfs_make_inode(struct super_block *sb, int mode)
 
         if (ret) {
                 ret->i_mode = mode;
-                ret->i_uid = ret->i_gid = 0;
+                ret->i_uid = GLOBAL_ROOT_UID;
+                ret->i_gid = GLOBAL_ROOT_GID;
                 ret->i_blocks = 0;
                 ret->i_atime = ret->i_mtime = ret->i_ctime = CURRENT_TIME;
         }