1 files changed, 20 insertions, 34 deletions

diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c
index 40b57693de38..afa9fdba200e 100644
--- a/arch/s390/kernel/setup.c
+++ b/arch/s390/kernel/setup.c
@@ -302,10 +302,10 @@ static int __init parse_vmalloc(char *arg)
 }
 early_param("vmalloc", parse_vmalloc);
 
-unsigned int addressing_mode = HOME_SPACE_MODE;
-EXPORT_SYMBOL_GPL(addressing_mode);
+unsigned int s390_user_mode = PRIMARY_SPACE_MODE;
+EXPORT_SYMBOL_GPL(s390_user_mode);
 
-static int set_amode_primary(void)
+static void __init set_user_mode_primary(void)
 {
         psw_kernel_bits = (psw_kernel_bits & ~PSW_MASK_ASC) | PSW_ASC_HOME;
         psw_user_bits = (psw_user_bits & ~PSW_MASK_ASC) | PSW_ASC_PRIMARY;
@@ -313,48 +313,30 @@ static int set_amode_primary(void)
         psw32_user_bits =
                 (psw32_user_bits & ~PSW32_MASK_ASC) | PSW32_ASC_PRIMARY;
 #endif
-
-        if (MACHINE_HAS_MVCOS) {
-                memcpy(&uaccess, &uaccess_mvcos_switch, sizeof(uaccess));
-                return 1;
-        } else {
-                memcpy(&uaccess, &uaccess_pt, sizeof(uaccess));
-                return 0;
-        }
-}
-
-/*
- * Switch kernel/user addressing modes?
- */
-static int __init early_parse_switch_amode(char *p)
-{
-        addressing_mode = PRIMARY_SPACE_MODE;
-        return 0;
+        uaccess = MACHINE_HAS_MVCOS ? uaccess_mvcos_switch : uaccess_pt;
 }
-early_param("switch_amode", early_parse_switch_amode);
 
 static int __init early_parse_user_mode(char *p)
 {
         if (p && strcmp(p, "primary") == 0)
-                addressing_mode = PRIMARY_SPACE_MODE;
+                s390_user_mode = PRIMARY_SPACE_MODE;
         else if (!p || strcmp(p, "home") == 0)
-                addressing_mode = HOME_SPACE_MODE;
+                s390_user_mode = HOME_SPACE_MODE;
         else
                 return 1;
         return 0;
 }
 early_param("user_mode", early_parse_user_mode);
 
-static void setup_addressing_mode(void)
+static void __init setup_addressing_mode(void)
 {
-        if (addressing_mode == PRIMARY_SPACE_MODE) {
-                if (set_amode_primary())
-                        pr_info("Address spaces switched, "
-                                "mvcos available\n");
-                else
-                        pr_info("Address spaces switched, "
-                                "mvcos not available\n");
-        }
+        if (s390_user_mode != PRIMARY_SPACE_MODE)
+                return;
+        set_user_mode_primary();
+        if (MACHINE_HAS_MVCOS)
+                pr_info("Address spaces switched, mvcos available\n");
+        else
+                pr_info("Address spaces switched, mvcos not available\n");
 }
 
 void *restart_stack __attribute__((__section__(".data")));
@@ -602,9 +584,7 @@ static void __init setup_memory_end(void)
 
 static void __init setup_vmcoreinfo(void)
 {
-#ifdef CONFIG_KEXEC
         mem_assign_absolute(S390_lowcore.vmcore_info, paddr_vmcoreinfo_note());
-#endif
 }
 
 #ifdef CONFIG_CRASH_DUMP
@@ -980,6 +960,12 @@ static void __init setup_hwcaps(void)
          * HWCAP_S390_HIGH_GPRS is bit 9.
          */
         elf_hwcap |= HWCAP_S390_HIGH_GPRS;
+
+        /*
+         * Transactional execution support HWCAP_S390_TE is bit 10.
+         */
+        if (test_facility(50) && test_facility(73))
+                elf_hwcap |= HWCAP_S390_TE;
 #endif
 
         get_cpu_id(&cpu_id);