Merge tag 'stable/for-linus-3.12-rc4-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip

Pull Xen fixes from Stefano Stabellini:
 "A small fix for Xen on x86_32 and a build fix for xen-tpmfront on
  arm64"

* tag 'stable/for-linus-3.12-rc4-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
  xen: Fix possible user space selector corruption
  tpm: xen-tpmfront: fix missing declaration of xen_domain

2 files changed, 10 insertions, 0 deletions

diff --git a/arch/x86/xen/smp.c b/arch/x86/xen/smp.c
index d1e4777b4e75..31d04758b76f 100644
--- a/arch/x86/xen/smp.c
+++ b/arch/x86/xen/smp.c
@@ -278,6 +278,15 @@ static void __init xen_smp_prepare_boot_cpu(void)
                    old memory can be recycled */
                 make_lowmem_page_readwrite(xen_initial_gdt);
 
+#ifdef CONFIG_X86_32
+                /*
+                 * Xen starts us with XEN_FLAT_RING1_DS, but linux code
+                 * expects __USER_DS
+                 */
+                loadsegment(ds, __USER_DS);
+                loadsegment(es, __USER_DS);
+#endif
+
                 xen_filter_cpu_maps();
                 xen_setup_vcpu_info_placement();
         }
diff --git a/drivers/char/tpm/xen-tpmfront.c b/drivers/char/tpm/xen-tpmfront.c
index 06189e55b4e5..94c280d36e8b 100644
--- a/drivers/char/tpm/xen-tpmfront.c
+++ b/drivers/char/tpm/xen-tpmfront.c
@@ -10,6 +10,7 @@
 #include <linux/errno.h>
 #include <linux/err.h>
 #include <linux/interrupt.h>
+#include <xen/xen.h>
 #include <xen/events.h>
 #include <xen/interface/io/tpmif.h>
 #include <xen/grant_table.h>