Merge branch 'linus' into x86/xen

Conflicts:
	arch/x86/kernel/cpu/common.c
	arch/x86/kernel/process_64.c
	arch/x86/xen/enlighten.c

7 files changed, 147 insertions, 3 deletions

diff --git a/arch/s390/include/asm/dasd.h b/arch/s390/include/asm/dasd.h
index 3f002e13d024..55b2b80cdf6e 100644
--- a/arch/s390/include/asm/dasd.h
+++ b/arch/s390/include/asm/dasd.h
@@ -3,6 +3,8 @@
  * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com>
  * Bugreports.to..: <Linux390@de.ibm.com>
  * (C) IBM Corporation, IBM Deutschland Entwicklung GmbH, 1999,2000
+ * EMC Symmetrix ioctl Copyright EMC Corporation, 2008
+ * Author.........: Nigel Hislop <hislop_nigel@emc.com>
  *
  * This file is the interface of the DASD device driver, which is exported to user space
  * any future changes wrt the API will result in a change of the APIVERSION reported
@@ -202,6 +204,16 @@ typedef struct attrib_data_t {
 #define DASD_SEQ_PRESTAGE  0x4
 #define DASD_REC_ACCESS    0x5
 
+/*
+ * Perform EMC Symmetrix I/O
+ */
+typedef struct dasd_symmio_parms {
+        unsigned char reserved[8];      /* compat with older releases */
+        unsigned long long psf_data;    /* char * cast to u64 */
+        unsigned long long rssd_result; /* char * cast to u64 */
+        int psf_data_len;
+        int rssd_result_len;
+} __attribute__ ((packed)) dasd_symmio_parms_t;
 
 /********************************************************************************
  * SECTION: Definition of IOCTLs
@@ -247,6 +259,7 @@ typedef struct attrib_data_t {
 /* Set Attributes (cache operations) */
 #define BIODASDSATTR   _IOW(DASD_IOCTL_LETTER,2,attrib_data_t) 
 
+#define BIODASDSYMMIO  _IOWR(DASD_IOCTL_LETTER, 240, dasd_symmio_parms_t)
 
 #endif                          /* DASD_H */
 
diff --git a/arch/s390/include/asm/delay.h b/arch/s390/include/asm/delay.h
index 78357314c450..a356c958e260 100644
--- a/arch/s390/include/asm/delay.h
+++ b/arch/s390/include/asm/delay.h
@@ -15,6 +15,7 @@
 #define _S390_DELAY_H
 
 extern void __udelay(unsigned long usecs);
+extern void udelay_simple(unsigned long usecs);
 extern void __delay(unsigned long loops);
 
 #define udelay(n) __udelay(n)
diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h
index 0bdb704ae051..1a928f84afd6 100644
--- a/arch/s390/include/asm/pgtable.h
+++ b/arch/s390/include/asm/pgtable.h
@@ -281,6 +281,9 @@ extern char empty_zero_page[PAGE_SIZE];
 #define RCP_GR_BIT      50
 #define RCP_GC_BIT      49
 
+/* User dirty bit for KVM's migration feature */
+#define KVM_UD_BIT      47
+
 #ifndef __s390x__
 
 /* Bits in the segment table address-space-control-element */
@@ -575,12 +578,16 @@ static inline void ptep_rcp_copy(pte_t *ptep)
         unsigned long *pgste = (unsigned long *) (ptep + PTRS_PER_PTE);
 
         skey = page_get_storage_key(page_to_phys(page));
-        if (skey & _PAGE_CHANGED)
+        if (skey & _PAGE_CHANGED) {
                 set_bit_simple(RCP_GC_BIT, pgste);
+                set_bit_simple(KVM_UD_BIT, pgste);
+        }
         if (skey & _PAGE_REFERENCED)
                 set_bit_simple(RCP_GR_BIT, pgste);
-        if (test_and_clear_bit_simple(RCP_HC_BIT, pgste))
+        if (test_and_clear_bit_simple(RCP_HC_BIT, pgste)) {
                 SetPageDirty(page);
+                set_bit_simple(KVM_UD_BIT, pgste);
+        }
         if (test_and_clear_bit_simple(RCP_HR_BIT, pgste))
                 SetPageReferenced(page);
 #endif
@@ -744,6 +751,40 @@ static inline pte_t pte_mkspecial(pte_t pte)
         return pte;
 }
 
+#ifdef CONFIG_PGSTE
+/*
+ * Get (and clear) the user dirty bit for a PTE.
+ */
+static inline int kvm_s390_test_and_clear_page_dirty(struct mm_struct *mm,
+                                                     pte_t *ptep)
+{
+        int dirty;
+        unsigned long *pgste;
+        struct page *page;
+        unsigned int skey;
+
+        if (!mm->context.pgstes)
+                return -EINVAL;
+        rcp_lock(ptep);
+        pgste = (unsigned long *) (ptep + PTRS_PER_PTE);
+        page = virt_to_page(pte_val(*ptep));
+        skey = page_get_storage_key(page_to_phys(page));
+        if (skey & _PAGE_CHANGED) {
+                set_bit_simple(RCP_GC_BIT, pgste);
+                set_bit_simple(KVM_UD_BIT, pgste);
+        }
+        if (test_and_clear_bit_simple(RCP_HC_BIT, pgste)) {
+                SetPageDirty(page);
+                set_bit_simple(KVM_UD_BIT, pgste);
+        }
+        dirty = test_and_clear_bit_simple(KVM_UD_BIT, pgste);
+        if (skey & _PAGE_CHANGED)
+                page_clear_dirty(page);
+        rcp_unlock(ptep);
+        return dirty;
+}
+#endif
+
 #define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG
 static inline int ptep_test_and_clear_young(struct vm_area_struct *vma,
                                             unsigned long addr, pte_t *ptep)
diff --git a/arch/s390/include/asm/ptrace.h b/arch/s390/include/asm/ptrace.h
index af2c9ac28a07..a7226f8143fb 100644
--- a/arch/s390/include/asm/ptrace.h
+++ b/arch/s390/include/asm/ptrace.h
@@ -490,6 +490,7 @@ extern void user_disable_single_step(struct task_struct *);
 
 #define user_mode(regs) (((regs)->psw.mask & PSW_MASK_PSTATE) != 0)
 #define instruction_pointer(regs) ((regs)->psw.addr & PSW_ADDR_INSN)
+#define user_stack_pointer(regs)((regs)->gprs[15])
 #define regs_return_value(regs)((regs)->gprs[2])
 #define profile_pc(regs) instruction_pointer(regs)
 extern void show_regs(struct pt_regs * regs);
diff --git a/arch/s390/include/asm/qdio.h b/arch/s390/include/asm/qdio.h
index 6813772171f2..4734c3f05354 100644
--- a/arch/s390/include/asm/qdio.h
+++ b/arch/s390/include/asm/qdio.h
@@ -299,7 +299,13 @@ struct qdio_ssqd_desc {
         u8 mbccnt;
         u16 qdioac2;
         u64 sch_token;
-        u64:64;
+        u8 mro;
+        u8 mri;
+        u8:8;
+        u8 sbalic;
+        u16:16;
+        u8:8;
+        u8 mmwc;
 } __attribute__ ((packed));
 
 /* params are: ccw_device, qdio_error, queue_number,
diff --git a/arch/s390/include/asm/syscall.h b/arch/s390/include/asm/syscall.h
new file mode 100644
index 000000000000..6e623971fbb9
--- /dev/null
+++ b/arch/s390/include/asm/syscall.h
@@ -0,0 +1,80 @@
+/*
+ * Access to user system call parameters and results
+ *
+ *  Copyright IBM Corp. 2008
+ *  Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License (version 2 only)
+ * as published by the Free Software Foundation.
+ */
+
+#ifndef _ASM_SYSCALL_H
+#define _ASM_SYSCALL_H  1
+
+#include <asm/ptrace.h>
+
+static inline long syscall_get_nr(struct task_struct *task,
+                                  struct pt_regs *regs)
+{
+        if (regs->trap != __LC_SVC_OLD_PSW)
+                return -1;
+        return regs->gprs[2];
+}
+
+static inline void syscall_rollback(struct task_struct *task,
+                                    struct pt_regs *regs)
+{
+        regs->gprs[2] = regs->orig_gpr2;
+}
+
+static inline long syscall_get_error(struct task_struct *task,
+                                     struct pt_regs *regs)
+{
+        return (regs->gprs[2] >= -4096UL) ? -regs->gprs[2] : 0;
+}
+
+static inline long syscall_get_return_value(struct task_struct *task,
+                                            struct pt_regs *regs)
+{
+        return regs->gprs[2];
+}
+
+static inline void syscall_set_return_value(struct task_struct *task,
+                                            struct pt_regs *regs,
+                                            int error, long val)
+{
+        regs->gprs[2] = error ? -error : val;
+}
+
+static inline void syscall_get_arguments(struct task_struct *task,
+                                         struct pt_regs *regs,
+                                         unsigned int i, unsigned int n,
+                                         unsigned long *args)
+{
+        BUG_ON(i + n > 6);
+#ifdef CONFIG_COMPAT
+        if (test_tsk_thread_flag(task, TIF_31BIT)) {
+                if (i + n == 6)
+                        args[--n] = (u32) regs->args[0];
+                while (n-- > 0)
+                        args[n] = (u32) regs->gprs[2 + i + n];
+        }
+#endif
+        if (i + n == 6)
+                args[--n] = regs->args[0];
+        memcpy(args, &regs->gprs[2 + i], n * sizeof(args[0]));
+}
+
+static inline void syscall_set_arguments(struct task_struct *task,
+                                         struct pt_regs *regs,
+                                         unsigned int i, unsigned int n,
+                                         const unsigned long *args)
+{
+        BUG_ON(i + n > 6);
+        if (i + n == 6)
+                regs->args[0] = args[--n];
+        memcpy(&regs->gprs[2 + i], args, n * sizeof(args[0]));
+}
+
+#endif  /* _ASM_SYSCALL_H */
diff --git a/arch/s390/include/asm/thread_info.h b/arch/s390/include/asm/thread_info.h
index 91a8f93ad355..ea40a9d690fc 100644
--- a/arch/s390/include/asm/thread_info.h
+++ b/arch/s390/include/asm/thread_info.h
@@ -86,6 +86,7 @@ static inline struct thread_info *current_thread_info(void)
  * thread information flags bit numbers
  */
 #define TIF_SYSCALL_TRACE       0       /* syscall trace active */
+#define TIF_NOTIFY_RESUME       1       /* callback before returning to user */
 #define TIF_SIGPENDING          2       /* signal pending */
 #define TIF_NEED_RESCHED        3       /* rescheduling necessary */
 #define TIF_RESTART_SVC         4       /* restart svc with new svc number */
@@ -100,6 +101,7 @@ static inline struct thread_info *current_thread_info(void)
 #define TIF_RESTORE_SIGMASK     20      /* restore signal mask in do_signal() */
 
 #define _TIF_SYSCALL_TRACE      (1<<TIF_SYSCALL_TRACE)
+#define _TIF_NOTIFY_RESUME      (1<<TIF_NOTIFY_RESUME)
 #define _TIF_RESTORE_SIGMASK    (1<<TIF_RESTORE_SIGMASK)
 #define _TIF_SIGPENDING         (1<<TIF_SIGPENDING)
 #define _TIF_NEED_RESCHED       (1<<TIF_NEED_RESCHED)