28 files changed, 282 insertions, 82 deletions

diff --git a/arch/s390/include/asm/delay.h b/arch/s390/include/asm/delay.h
index a356c958e260..8a096b83f51f 100644
--- a/arch/s390/include/asm/delay.h
+++ b/arch/s390/include/asm/delay.h
@@ -14,10 +14,11 @@
 #ifndef _S390_DELAY_H
 #define _S390_DELAY_H
 
-extern void __udelay(unsigned long usecs);
-extern void udelay_simple(unsigned long usecs);
+extern void __udelay(unsigned long long usecs);
+extern void udelay_simple(unsigned long long usecs);
 extern void __delay(unsigned long loops);
 
-#define udelay(n) __udelay(n)
+#define udelay(n) __udelay((unsigned long long) (n))
+#define mdelay(n) __udelay((unsigned long long) (n) * 1000)
 
 #endif /* defined(_S390_DELAY_H) */
diff --git a/arch/s390/include/asm/elf.h b/arch/s390/include/asm/elf.h
index 74d0bbb7d955..e885442c1dfe 100644
--- a/arch/s390/include/asm/elf.h
+++ b/arch/s390/include/asm/elf.h
@@ -92,6 +92,18 @@
 /* Keep this the last entry.  */
 #define R_390_NUM       61
 
+/* Bits present in AT_HWCAP. */
+#define HWCAP_S390_ESAN3        1
+#define HWCAP_S390_ZARCH        2
+#define HWCAP_S390_STFLE        4
+#define HWCAP_S390_MSA          8
+#define HWCAP_S390_LDISP        16
+#define HWCAP_S390_EIMM         32
+#define HWCAP_S390_DFP          64
+#define HWCAP_S390_HPAGE        128
+#define HWCAP_S390_ETF3EH       256
+#define HWCAP_S390_HIGH_GPRS    512
+
 /*
  * These are used to set parameters in the core dumps.
  */
diff --git a/arch/s390/include/asm/ptrace.h b/arch/s390/include/asm/ptrace.h
index 539263fc9ab9..95dcf183a28d 100644
--- a/arch/s390/include/asm/ptrace.h
+++ b/arch/s390/include/asm/ptrace.h
@@ -311,6 +311,10 @@ typedef struct
         __u32           orig_gpr2;
 } s390_compat_regs;
 
+typedef struct
+{
+        __u32           gprs_high[NUM_GPRS];
+} s390_compat_regs_high;
 
 #ifdef __KERNEL__
 
diff --git a/arch/s390/include/asm/ucontext.h b/arch/s390/include/asm/ucontext.h
index d69bec0b03f5..cfb874e66c9a 100644
--- a/arch/s390/include/asm/ucontext.h
+++ b/arch/s390/include/asm/ucontext.h
@@ -9,6 +9,21 @@
 #ifndef _ASM_S390_UCONTEXT_H
 #define _ASM_S390_UCONTEXT_H
 
+#define UC_EXTENDED     0x00000001
+
+#ifndef __s390x__
+
+struct ucontext_extended {
+        unsigned long     uc_flags;
+        struct ucontext  *uc_link;
+        stack_t           uc_stack;
+        _sigregs          uc_mcontext;
+        unsigned long     uc_sigmask[2];
+        unsigned long     uc_gprs_high[16];
+};
+
+#endif
+
 struct ucontext {
         unsigned long     uc_flags;
         struct ucontext  *uc_link;
diff --git a/arch/s390/kernel/compat_signal.c b/arch/s390/kernel/compat_signal.c
index b537cb0e9b55..eee999853a7c 100644
--- a/arch/s390/kernel/compat_signal.c
+++ b/arch/s390/kernel/compat_signal.c
@@ -39,6 +39,7 @@ typedef struct
         struct sigcontext32 sc;
         _sigregs32 sregs;
         int signo;
+        __u32 gprs_high[NUM_GPRS];
         __u8 retcode[S390_SYSCALL_SIZE];
 } sigframe32;
 
@@ -48,6 +49,7 @@ typedef struct
         __u8 retcode[S390_SYSCALL_SIZE];
         compat_siginfo_t info;
         struct ucontext32 uc;
+        __u32 gprs_high[NUM_GPRS];
 } rt_sigframe32;
 
 int copy_siginfo_to_user32(compat_siginfo_t __user *to, siginfo_t *from)
@@ -344,6 +346,30 @@ static int restore_sigregs32(struct pt_regs *regs,_sigregs32 __user *sregs)
         return 0;
 }
 
+static int save_sigregs_gprs_high(struct pt_regs *regs, __u32 __user *uregs)
+{
+        __u32 gprs_high[NUM_GPRS];
+        int i;
+
+        for (i = 0; i < NUM_GPRS; i++)
+                gprs_high[i] = regs->gprs[i] >> 32;
+
+        return __copy_to_user(uregs, &gprs_high, sizeof(gprs_high));
+}
+
+static int restore_sigregs_gprs_high(struct pt_regs *regs, __u32 __user *uregs)
+{
+        __u32 gprs_high[NUM_GPRS];
+        int err, i;
+
+        err = __copy_from_user(&gprs_high, uregs, sizeof(gprs_high));
+        if (err)
+                return err;
+        for (i = 0; i < NUM_GPRS; i++)
+                *(__u32 *)&regs->gprs[i] = gprs_high[i];
+        return 0;
+}
+
 asmlinkage long sys32_sigreturn(void)
 {
         struct pt_regs *regs = task_pt_regs(current);
@@ -363,6 +389,8 @@ asmlinkage long sys32_sigreturn(void)
 
         if (restore_sigregs32(regs, &frame->sregs))
                 goto badframe;
+        if (restore_sigregs_gprs_high(regs, frame->gprs_high))
+                goto badframe;
 
         return regs->gprs[2];
 
@@ -394,6 +422,8 @@ asmlinkage long sys32_rt_sigreturn(void)
 
         if (restore_sigregs32(regs, &frame->uc.uc_mcontext))
                 goto badframe;
+        if (restore_sigregs_gprs_high(regs, frame->gprs_high))
+                goto badframe;