2nd batch of s390 patches for 2.6.26

Index: quilt-2.6/drivers/s390/cio/ccwgroup.c
===================================================================
@@ -318,7 +318,7 @@ ccwgroup_online_store (struct device *de
 {
 	struct ccwgroup_device *gdev;
 	struct ccwgroup_driver *gdrv;
-	unsigned int value;
+	unsigned long value;
 	int ret;
 
 	gdev = to_ccwgroupdev(dev);

@@ -329,7 +329,9 @@ ccwgroup_online_store (struct device *de
 	if (!try_module_get(gdrv->owner))
 		return -EINVAL;
 
-	value = simple_strtoul(buf, NULL, 0);
+	ret = strict_strtoul(buf, 0, &value);
+	if (ret)
+		goto out;
 	ret = count;
 	if (value == 1)
 		ccwgroup_set_online(gdev);

@@ -337,6 +339,7 @@ ccwgroup_online_store (struct device *de
 		ccwgroup_set_offline(gdev);
 	else
 		ret = -EINVAL;
+out:
 	module_put(gdrv->owner);
 	return ret;
 }

Index: quilt-2.6/drivers/s390/cio/cmf.c
===================================================================
@@ -1219,16 +1219,21 @@ static ssize_t cmb_enable_store(struct d
 {
 	struct ccw_device *cdev;
 	int ret;
+	unsigned long val;
+
+	ret = strict_strtoul(buf, 16, &val);
+	if (ret)
+		return ret;
 
 	cdev = to_ccwdev(dev);
 
-	switch (buf[0]) {
-	case '0':
+	switch (val) {
+	case 0:
 		ret = disable_cmf(cdev);
 		if (ret)
 			dev_info(&cdev->dev, "disable_cmf failed (%d)\n", ret);
 		break;
-	case '1':
+	case 1:
 		ret = enable_cmf(cdev);
 		if (ret && ret != -EBUSY)
 			dev_info(&cdev->dev, "enable_cmf failed (%d)\n", ret);

Index: quilt-2.6/drivers/s390/cio/css.c
===================================================================
@@ -705,13 +705,17 @@ css_cm_enable_store(struct device *dev, 
 {
 	struct channel_subsystem *css = to_css(dev);
 	int ret;
+	unsigned long val;
 
+	ret = strict_strtoul(buf, 16, &val);
+	if (ret)
+		return ret;
 	mutex_lock(&css->mutex);
-	switch (buf[0]) {
-	case '0':
+	switch (val) {
+	case 0:
 		ret = css->cm_enabled ? chsc_secm(css, 0) : 0;
 		break;
-	case '1':
+	case 1:
 		ret = css->cm_enabled ? 0 : chsc_secm(css, 1);
 		break;
 	default:

Index: quilt-2.6/drivers/s390/cio/device.c
===================================================================
@@ -512,8 +512,8 @@ static ssize_t online_store (struct devi
 			     const char *buf, size_t count)
 {
 	struct ccw_device *cdev = to_ccwdev(dev);
-	int i, force;
-	char *tmp;
+	int force, ret;
+	unsigned long i;
 
 	if (atomic_cmpxchg(&cdev->private->onoff, 0, 1) != 0)
 		return -EAGAIN;

@@ -525,25 +525,30 @@ static ssize_t online_store (struct devi
 	if (!strncmp(buf, "force\n", count)) {
 		force = 1;
 		i = 1;
+		ret = 0;
 	} else {
 		force = 0;
-		i = simple_strtoul(buf, &tmp, 16);
+		ret = strict_strtoul(buf, 16, &i);
 	}
-
+	if (ret)
+		goto out;
 	switch (i) {
 	case 0:
 		online_store_handle_offline(cdev);
+		ret = count;
 		break;
 	case 1:
 		online_store_handle_online(cdev, force);
+		ret = count;
 		break;
 	default:
-		count = -EINVAL;
+		ret = -EINVAL;
 	}
+out:
 	if (cdev->drv)
 		module_put(cdev->drv->owner);
 	atomic_set(&cdev->private->onoff, 0);
-	return count;
+	return ret;
 }
 
 static ssize_t

Index: quilt-2.6/drivers/s390/cio/qdio.c
===================================================================
@@ -3663,11 +3663,11 @@ qdio_performance_stats_show(struct bus_t
 static ssize_t
 qdio_performance_stats_store(struct bus_type *bus, const char *buf, size_t count)
 {
-	char *tmp;
-	int i;
+	unsigned long i;
+	int ret;
 
-	i = simple_strtoul(buf, &tmp, 16);
-	if ((i == 0) || (i == 1)) {
+	ret = strict_strtoul(buf, 16, &i);
+	if (!ret && ((i == 0) || (i == 1))) {
 		if (i == qdio_performance_stats)
 			return count;
 		qdio_performance_stats = i;

Index: quilt-2.6/arch/s390/kernel/process.c
===================================================================
@@ -180,24 +180,6 @@ void cpu_idle(void)
 	}
 }
 
-void show_regs(struct pt_regs *regs)
-{
-	print_modules();
-	printk("CPU: %d %s %s %.*s\n",
-	       task_thread_info(current)->cpu, print_tainted(),
-	       init_utsname()->release,
-	       (int)strcspn(init_utsname()->version, " "),
-	       init_utsname()->version);
-	printk("Process %s (pid: %d, task: %p, ksp: %p)\n",
-	       current->comm, current->pid, current,
-	       (void *) current->thread.ksp);
-	show_registers(regs);
-	/* Show stack backtrace if pt_regs is from kernel mode */
-	if (!(regs->psw.mask & PSW_MASK_PSTATE))
-		show_trace(NULL, (unsigned long *) regs->gprs[15]);
-	show_last_breaking_event(regs);
-}
-
 extern void kernel_thread_starter(void);
 
 asm(

Index: quilt-2.6/arch/s390/kernel/traps.c
===================================================================
@@ -113,7 +113,7 @@ __show_trace(unsigned long sp, unsigned 
 	}
 }
 
-void show_trace(struct task_struct *task, unsigned long *stack)
+static void show_trace(struct task_struct *task, unsigned long *stack)
 {
 	register unsigned long __r15 asm ("15");
 	unsigned long sp;

@@ -161,14 +161,14 @@ void show_stack(struct task_struct *task
 	show_trace(task, sp);
 }
 
-#ifdef CONFIG_64BIT
-void show_last_breaking_event(struct pt_regs *regs)
+static void show_last_breaking_event(struct pt_regs *regs)
 {
+#ifdef CONFIG_64BIT
 	printk("Last Breaking-Event-Address:\n");
 	printk(" [<%016lx>] ", regs->args[0] & PSW_ADDR_INSN);
 	print_symbol("%s\n", regs->args[0] & PSW_ADDR_INSN);
-}
 #endif
+}
 
 /*
  * The architecture-independent dump_stack generator

@@ -223,6 +223,24 @@ void show_registers(struct pt_regs *regs
 	show_code(regs);
 }	
 
+void show_regs(struct pt_regs *regs)
+{
+	print_modules();
+	printk("CPU: %d %s %s %.*s\n",
+	       task_thread_info(current)->cpu, print_tainted(),
+	       init_utsname()->release,
+	       (int)strcspn(init_utsname()->version, " "),
+	       init_utsname()->version);
+	printk("Process %s (pid: %d, task: %p, ksp: %p)\n",
+	       current->comm, current->pid, current,
+	       (void *) current->thread.ksp);
+	show_registers(regs);
+	/* Show stack backtrace if pt_regs is from kernel mode */
+	if (!(regs->psw.mask & PSW_MASK_PSTATE))
+		show_trace(NULL, (unsigned long *) regs->gprs[15]);
+	show_last_breaking_event(regs);
+}
+
 /* This is called from fs/proc/array.c */
 void task_show_regs(struct seq_file *m, struct task_struct *task)
 {

Index: quilt-2.6/include/asm-s390/processor.h
===================================================================
@@ -172,16 +172,7 @@ extern unsigned long thread_saved_pc(str
  */
 extern void task_show_regs(struct seq_file *m, struct task_struct *task);
 
-extern void show_registers(struct pt_regs *regs);
 extern void show_code(struct pt_regs *regs);
-extern void show_trace(struct task_struct *task, unsigned long *sp);
-#ifdef CONFIG_64BIT
-extern void show_last_breaking_event(struct pt_regs *regs);
-#else
-static inline void show_last_breaking_event(struct pt_regs *regs)
-{
-}
-#endif
 
 unsigned long get_wchan(struct task_struct *p);
 #define task_pt_regs(tsk) ((struct pt_regs *) \

Index: quilt-2.6/include/asm-s390/sysinfo.h
===================================================================
@@ -11,6 +11,9 @@
  *		 Christian Borntraeger <[email protected]>
  */
 
+#ifndef __ASM_S390_SYSINFO_H
+#define __ASM_S390_SYSINFO_H
+
 struct sysinfo_1_1_1 {
 	char reserved_0[32];
 	char manufacturer[16];

@@ -114,3 +117,5 @@ static inline int stsi(void *sysinfo, in
 		: "cc", "memory");
 	return r0;
 }
+
+#endif /* __ASM_S390_SYSINFO_H */

Index: quilt-2.6/arch/s390/kernel/smp.c
===================================================================
@@ -890,8 +890,8 @@ static ssize_t cpu_configure_store(struc
 	if (val != 0 && val != 1)
 		return -EINVAL;
 
-	mutex_lock(&smp_cpu_state_mutex);
 	get_online_cpus();
+	mutex_lock(&smp_cpu_state_mutex);
 	rc = -EBUSY;
 	if (cpu_online(cpu))
 		goto out;

@@ -919,8 +919,8 @@ static ssize_t cpu_configure_store(struc
 		break;
 	}
 out:
-	put_online_cpus();
 	mutex_unlock(&smp_cpu_state_mutex);
+	put_online_cpus();
 	return rc ? rc : count;
 }
 static SYSDEV_ATTR(configure, 0644, cpu_configure_show, cpu_configure_store);

@@ -1095,8 +1095,8 @@ static ssize_t __ref rescan_store(struct
 	int cpu;
 	int rc;
 
-	mutex_lock(&smp_cpu_state_mutex);
 	get_online_cpus();
+	mutex_lock(&smp_cpu_state_mutex);
 	newcpus = cpu_present_map;
 	rc = smp_rescan_cpus();
 	if (rc)

@@ -1109,8 +1109,8 @@ static ssize_t __ref rescan_store(struct
 	}
 	rc = 0;
 out:
-	put_online_cpus();
 	mutex_unlock(&smp_cpu_state_mutex);
+	put_online_cpus();
 	if (!cpus_empty(newcpus))
 		topology_schedule_update();
 	return rc ? rc : count;

@@ -1139,16 +1139,16 @@ static ssize_t dispatching_store(struct 
 	if (val != 0 && val != 1)
 		return -EINVAL;
 	rc = 0;
-	mutex_lock(&smp_cpu_state_mutex);
 	get_online_cpus();
+	mutex_lock(&smp_cpu_state_mutex);
 	if (cpu_management == val)
 		goto out;
 	rc = topology_set_cpu_management(val);
 	if (!rc)
 		cpu_management = val;
 out:
-	put_online_cpus();
 	mutex_unlock(&smp_cpu_state_mutex);
+	put_online_cpus();
 	return rc ? rc : count;
 }
 static SYSDEV_ATTR(dispatching, 0644, dispatching_show, dispatching_store);

Index: quilt-2.6/arch/s390/kernel/smp.c
===================================================================
@@ -505,7 +505,7 @@ out:
 	return rc;
 }
 
-static int smp_rescan_cpus(void)
+static int __smp_rescan_cpus(void)
 {
 	cpumask_t avail;
 

@@ -570,7 +570,7 @@ out:
 	kfree(info);
 	printk(KERN_INFO "CPUs: %d configured, %d standby\n", c_cpus, s_cpus);
 	get_online_cpus();
-	smp_rescan_cpus();
+	__smp_rescan_cpus();
 	put_online_cpus();
 }
 

@@ -1088,8 +1088,8 @@ out:
 }
 
 #ifdef CONFIG_HOTPLUG_CPU
-static ssize_t __ref rescan_store(struct sys_device *dev,
-				  const char *buf, size_t count)
+
+int smp_rescan_cpus(void)
 {
 	cpumask_t newcpus;
 	int cpu;

@@ -1098,7 +1098,7 @@ static ssize_t __ref rescan_store(struct
 	get_online_cpus();
 	mutex_lock(&smp_cpu_state_mutex);
 	newcpus = cpu_present_map;
-	rc = smp_rescan_cpus();
+	rc = __smp_rescan_cpus();
 	if (rc)
 		goto out;
 	cpus_andnot(newcpus, cpu_present_map, newcpus);

@@ -1113,6 +1113,15 @@ out:
 	put_online_cpus();
 	if (!cpus_empty(newcpus))
 		topology_schedule_update();
+	return rc;
+}
+
+static ssize_t __ref rescan_store(struct sys_device *dev, const char *buf,
+				  size_t count)
+{
+	int rc;
+
+	rc = smp_rescan_cpus();
 	return rc ? rc : count;
 }
 static SYSDEV_ATTR(rescan, 0200, NULL, rescan_store);

Index: quilt-2.6/drivers/s390/char/sclp_config.c
===================================================================
@@ -10,6 +10,7 @@
 #include <linux/cpu.h>
 #include <linux/sysdev.h>
 #include <linux/workqueue.h>
+#include <asm/smp.h>
 #include "sclp.h"
 
 #define TAG	"sclp_config: "

@@ -19,9 +20,11 @@ struct conf_mgm_data {
 	u8 ev_qualifier;
 } __attribute__((packed));
 
+#define EV_QUAL_CPU_CHANGE	1
 #define EV_QUAL_CAP_CHANGE	3
 
 static struct work_struct sclp_cpu_capability_work;
+static struct work_struct sclp_cpu_change_work;
 
 static void sclp_cpu_capability_notify(struct work_struct *work)
 {

@@ -37,13 +40,24 @@ static void sclp_cpu_capability_notify(s
 	put_online_cpus();
 }
 
+static void sclp_cpu_change_notify(struct work_struct *work)
+{
+	smp_rescan_cpus();
+}
+
 static void sclp_conf_receiver_fn(struct evbuf_header *evbuf)
 {
 	struct conf_mgm_data *cdata;
 
 	cdata = (struct conf_mgm_data *)(evbuf + 1);
-	if (cdata->ev_qualifier == EV_QUAL_CAP_CHANGE)
+	switch (cdata->ev_qualifier) {
+	case EV_QUAL_CPU_CHANGE:
+		schedule_work(&sclp_cpu_change_work);
+		break;
+	case EV_QUAL_CAP_CHANGE:
 		schedule_work(&sclp_cpu_capability_work);
+		break;
+	}
 }
 
 static struct sclp_register sclp_conf_register =

@@ -57,6 +71,7 @@ static int __init sclp_conf_init(void)
 	int rc;
 
 	INIT_WORK(&sclp_cpu_capability_work, sclp_cpu_capability_notify);
+	INIT_WORK(&sclp_cpu_change_work, sclp_cpu_change_notify);
 
 	rc = sclp_register(&sclp_conf_register);
 	if (rc) {

Index: quilt-2.6/include/asm-s390/smp.h
===================================================================
@@ -108,5 +108,11 @@ static inline void smp_send_stop(void)
 #define smp_cpu_not_running(cpu)	1
 #endif
 
+#ifdef CONFIG_HOTPLUG_CPU
+extern int smp_rescan_cpus(void);
+#else
+static inline int smp_rescan_cpus(void) { return 0; }
+#endif
+
 extern union save_area *zfcpdump_save_areas[NR_CPUS + 1];
 #endif

Index: quilt-2.6/drivers/s390/cio/cio.c
===================================================================
@@ -407,8 +407,7 @@ cio_modify (struct subchannel *sch)
 /*
  * Enable subchannel.
  */
-int cio_enable_subchannel(struct subchannel *sch, unsigned int isc,
-			  u32 intparm)
+int cio_enable_subchannel(struct subchannel *sch, u32 intparm)
 {
 	char dbf_txt[15];
 	int ccode;

@@ -426,7 +425,7 @@ int cio_enable_subchannel(struct subchan
 
 	for (retry = 5, ret = 0; retry > 0; retry--) {
 		sch->schib.pmcw.ena = 1;
-		sch->schib.pmcw.isc = isc;
+		sch->schib.pmcw.isc = sch->isc;
 		sch->schib.pmcw.intparm = intparm;
 		ret = cio_modify(sch);
 		if (ret == -ENODEV)

@@ -600,6 +599,7 @@ cio_validate_subchannel (struct subchann
 	else
 		sch->opm = chp_get_sch_opm(sch);
 	sch->lpm = sch->schib.pmcw.pam & sch->opm;
+	sch->isc = 3;
 
 	CIO_DEBUG(KERN_INFO, 0,
 		  "Detected device %04x on subchannel 0.%x.%04X"

@@ -610,13 +610,11 @@ cio_validate_subchannel (struct subchann
 
 	/*
 	 * We now have to initially ...
-	 *  ... set "interruption subclass"
 	 *  ... enable "concurrent sense"
 	 *  ... enable "multipath mode" if more than one
 	 *	  CHPID is available. This is done regardless
 	 *	  whether multiple paths are available for us.
 	 */
-	sch->schib.pmcw.isc = 3;	/* could be smth. else */
 	sch->schib.pmcw.csense = 1;	/* concurrent sense */
 	sch->schib.pmcw.ena = 0;
 	if ((sch->lpm & (sch->lpm - 1)) != 0)

@@ -812,6 +810,7 @@ cio_probe_console(void)
 	 * enable console I/O-interrupt subclass 7
 	 */
 	ctl_set_bit(6, 24);
+	console_subchannel.isc = 7;
 	console_subchannel.schib.pmcw.isc = 7;
 	console_subchannel.schib.pmcw.intparm =
 		(u32)(addr_t)&console_subchannel;

Index: quilt-2.6/drivers/s390/cio/cio.h
===================================================================
@@ -74,6 +74,7 @@ struct subchannel {
 	__u8 lpm;		/* logical path mask */
 	__u8 opm;               /* operational path mask */
 	struct schib schib;	/* subchannel information block */
+	int isc; /* desired interruption subclass */
 	struct chsc_ssd_info ssd_info;	/* subchannel description */
 	struct device dev;	/* entry in device tree */
 	struct css_driver *driver;

@@ -85,7 +86,7 @@ struct subchannel {
 #define to_subchannel(n) container_of(n, struct subchannel, dev)
 
 extern int cio_validate_subchannel (struct subchannel *, struct subchannel_id);
-extern int cio_enable_subchannel(struct subchannel *, unsigned int, u32);
+extern int cio_enable_subchannel(struct subchannel *, u32);
 extern int cio_disable_subchannel (struct subchannel *);
 extern int cio_cancel (struct subchannel *);
 extern int cio_clear (struct subchannel *);

Index: quilt-2.6/drivers/s390/cio/device_fsm.c
===================================================================
@@ -555,8 +555,7 @@ ccw_device_recognition(struct ccw_device
 	    (cdev->private->state != DEV_STATE_BOXED))
 		return -EINVAL;
 	sch = to_subchannel(cdev->dev.parent);
-	ret = cio_enable_subchannel(sch, sch->schib.pmcw.isc,
-				    (u32)(addr_t)sch);
+	ret = cio_enable_subchannel(sch, (u32)(addr_t)sch);
 	if (ret != 0)
 		/* Couldn't enable the subchannel for i/o. Sick device. */
 		return ret;

@@ -667,8 +666,7 @@ ccw_device_online(struct ccw_device *cde
 	sch = to_subchannel(cdev->dev.parent);
 	if (css_init_done && !get_device(&cdev->dev))
 		return -ENODEV;
-	ret = cio_enable_subchannel(sch, sch->schib.pmcw.isc,
-				    (u32)(addr_t)sch);
+	ret = cio_enable_subchannel(sch, (u32)(addr_t)sch);
 	if (ret != 0) {
 		/* Couldn't enable the subchannel for i/o. Sick device. */
 		if (ret == -ENODEV)

@@ -1048,8 +1046,7 @@ ccw_device_start_id(struct ccw_device *c
 	struct subchannel *sch;
 
 	sch = to_subchannel(cdev->dev.parent);
-	if (cio_enable_subchannel(sch, sch->schib.pmcw.isc,
-				  (u32)(addr_t)sch) != 0)
+	if (cio_enable_subchannel(sch, (u32)(addr_t)sch) != 0)
 		/* Couldn't enable the subchannel for i/o. Sick device. */
 		return;
 

@@ -1082,7 +1079,6 @@ device_trigger_reprobe(struct subchannel
 	 */
 	sch->lpm = sch->schib.pmcw.pam & sch->opm;
 	/* Re-set some bits in the pmcw that were lost. */
-	sch->schib.pmcw.isc = 3;
 	sch->schib.pmcw.csense = 1;
 	sch->schib.pmcw.ena = 0;
 	if ((sch->lpm & (sch->lpm - 1)) != 0)

Index: quilt-2.6/drivers/s390/cio/device_ops.c
===================================================================
@@ -508,7 +508,7 @@ ccw_device_stlck(struct ccw_device *cdev
 		return -ENOMEM;
 	}
 	spin_lock_irqsave(sch->lock, flags);
-	ret = cio_enable_subchannel(sch, 3, (u32)(addr_t)sch);
+	ret = cio_enable_subchannel(sch, (u32)(addr_t)sch);
 	if (ret)
 		goto out_unlock;
 	/*

Index: quilt-2.6/arch/s390/kernel/topology.c
===================================================================
@@ -66,6 +66,8 @@ static struct timer_list topology_timer;
 static void set_topology_timer(void);
 static DECLARE_WORK(topology_work, topology_work_fn);
 
+cpumask_t cpu_core_map[NR_CPUS];
+
 cpumask_t cpu_coregroup_map(unsigned int cpu)
 {
 	struct core_info *core = &core_info;

@@ -199,6 +201,14 @@ int topology_set_cpu_management(int fc)
 	return rc;
 }
 
+static void update_cpu_core_map(void)
+{
+	int cpu;
+
+	for_each_present_cpu(cpu)
+		cpu_core_map[cpu] = cpu_coregroup_map(cpu);
+}
+
 void arch_update_cpu_topology(void)
 {
 	struct tl_info *info = tl_info;

@@ -206,11 +216,13 @@ void arch_update_cpu_topology(void)
 	int cpu;
 
 	if (!machine_has_topology) {
+		update_cpu_core_map();
 		topology_update_polarization_simple();
 		return;
 	}
 	stsi(info, 15, 1, 2);
 	tl_to_cores(info);
+	update_cpu_core_map();
 	for_each_online_cpu(cpu) {
 		sysdev = get_cpu_sysdev(cpu);
 		kobject_uevent(&sysdev->kobj, KOBJ_CHANGE);

@@ -251,20 +263,23 @@ static int __init init_topology_update(v
 {
 	int rc;
 
+	rc = 0;
 	if (!machine_has_topology) {
 		topology_update_polarization_simple();
-		return 0;
+		goto out;
 	}
 	init_timer_deferrable(&topology_timer);
 	if (machine_has_topology_irq) {
 		rc = register_external_interrupt(0x2005, topology_interrupt);
 		if (rc)
-			return rc;
+			goto out;
 		ctl_set_bit(0, 8);
 	}
 	else
 		set_topology_timer();
-	return 0;
+out:
+	update_cpu_core_map();
+	return rc;
 }
 __initcall(init_topology_update);
 

Index: quilt-2.6/include/asm-s390/topology.h
===================================================================
@@ -7,6 +7,10 @@
 
 cpumask_t cpu_coregroup_map(unsigned int cpu);
 
+extern cpumask_t cpu_core_map[NR_CPUS];
+
+#define topology_core_siblings(cpu)	(cpu_core_map[cpu])
+
 int topology_set_cpu_management(int fc);
 void topology_schedule_update(void);
 

Index: quilt-2.6/arch/s390/kernel/topology.c
===================================================================
@@ -9,6 +9,7 @@
 #include <linux/device.h>
 #include <linux/bootmem.h>
 #include <linux/sched.h>
+#include <linux/kthread.h>
 #include <linux/workqueue.h>
 #include <linux/cpu.h>
 #include <linux/smp.h>

@@ -229,9 +230,20 @@ void arch_update_cpu_topology(void)
 	}
 }
 
-static void topology_work_fn(struct work_struct *work)
+static int topology_kthread(void *data)
 {
 	arch_reinit_sched_domains();
+	return 0;
+}
+
+static void topology_work_fn(struct work_struct *work)
+{
+	/* We can't call arch_reinit_sched_domains() from a multi-threaded
+	 * workqueue context since it may deadlock in case of cpu hotplug.
+	 * So we have to create a kernel thread in order to call
+	 * arch_reinit_sched_domains().
+	 */
+	kthread_run(topology_kthread, NULL, "topology_update");
 }
 
 void topology_schedule_update(void)

Index: quilt-2.6/arch/s390/lib/uaccess_mvcos.c
===================================================================
@@ -162,6 +162,7 @@ static size_t clear_user_mvcos(size_t si
 	return size;
 }
 
+#ifdef CONFIG_S390_SWITCH_AMODE
 static size_t strnlen_user_mvcos(size_t count, const char __user *src)
 {
 	char buf[256];

@@ -199,6 +200,7 @@ static size_t strncpy_from_user_mvcos(si
 	} while ((len_str == len) && (done < count));
 	return done;
 }
+#endif /* CONFIG_S390_SWITCH_AMODE */
 
 struct uaccess_ops uaccess_mvcos = {
 	.copy_from_user = copy_from_user_mvcos_check,

Index: quilt-2.6/arch/s390/kernel/setup.c
===================================================================
@@ -683,15 +683,6 @@ setup_memory(void)
 #endif
 }
 
-static __init unsigned int stfl(void)
-{
-	asm volatile(
-		"	.insn	s,0xb2b10000,0(0)\n" /* stfl */
-		"0:\n"
-		EX_TABLE(0b,0b));
-	return S390_lowcore.stfl_fac_list;
-}
-
 static int __init __stfle(unsigned long long *list, int doublewords)
 {
 	typedef struct { unsigned long long _[doublewords]; } addrtype;

Index: quilt-2.6/arch/s390/kvm/priv.c
===================================================================
@@ -151,18 +151,9 @@ static int handle_chsc(struct kvm_vcpu *
 	return 0;
 }
 
-static unsigned int kvm_stfl(void)
-{
-	asm volatile(
-		"	.insn	s,0xb2b10000,0(0)\n" /* stfl */
-		"0:\n"
-		EX_TABLE(0b, 0b));
-	return S390_lowcore.stfl_fac_list;
-}
-
 static int handle_stfl(struct kvm_vcpu *vcpu)
 {
-	unsigned int facility_list = kvm_stfl();
+	unsigned int facility_list = stfl();
 	int rc;
 
 	vcpu->stat.instruction_stfl++;

Index: quilt-2.6/include/asm-s390/system.h
===================================================================
@@ -16,6 +16,7 @@
 #include <asm/ptrace.h>
 #include <asm/setup.h>
 #include <asm/processor.h>
+#include <asm/lowcore.h>
 
 #ifdef __KERNEL__
 

@@ -422,6 +423,15 @@ extern void smp_ctl_clear_bit(int cr, in
 
 #endif /* CONFIG_SMP */
 
+static inline unsigned int stfl(void)
+{
+	asm volatile(
+		"	.insn	s,0xb2b10000,0(0)\n" /* stfl */
+		"0:\n"
+		EX_TABLE(0b,0b));
+	return S390_lowcore.stfl_fac_list;
+}
+
 extern void (*_machine_restart)(char *command);
 extern void (*_machine_halt)(void);
 extern void (*_machine_power_off)(void);

Index: quilt-2.6/arch/s390/mm/vmem.c
===================================================================
@@ -77,8 +77,7 @@ static inline pud_t *vmem_pud_alloc(void
 	pud = vmem_alloc_pages(2);
 	if (!pud)
 		return NULL;
-	pud_val(*pud) = _REGION3_ENTRY_EMPTY;
-	memcpy(pud + 1, pud, (PTRS_PER_PUD - 1)*sizeof(pud_t));
+	clear_table((unsigned long *) pud, _REGION3_ENTRY_EMPTY, PAGE_SIZE * 4);
 #endif
 	return pud;
 }

@@ -91,7 +90,7 @@ static inline pmd_t *vmem_pmd_alloc(void
 	pmd = vmem_alloc_pages(2);
 	if (!pmd)
 		return NULL;
-	clear_table((unsigned long *) pmd, _SEGMENT_ENTRY_EMPTY, PAGE_SIZE*4);
+	clear_table((unsigned long *) pmd, _SEGMENT_ENTRY_EMPTY, PAGE_SIZE * 4);
 #endif
 	return pmd;
 }

Index: quilt-2.6/arch/s390/kernel/early.c
===================================================================
@@ -139,15 +139,15 @@ static noinline __init void detect_machi
 
 	/* Running under z/VM ? */
 	if (cpuinfo->cpu_id.version == 0xff)
-		machine_flags |= 1;
+		machine_flags |= MACHINE_FLAG_VM;
 
 	/* Running on a P/390 ? */
 	if (cpuinfo->cpu_id.machine == 0x7490)
-		machine_flags |= 4;
+		machine_flags |= MACHINE_FLAG_P390;
 
 	/* Running under KVM ? */
 	if (cpuinfo->cpu_id.version == 0xfe)
-		machine_flags |= 64;
+		machine_flags |= MACHINE_FLAG_KVM;
 }
 
 #ifdef CONFIG_64BIT

@@ -268,6 +268,103 @@ static noinline __init void setup_lowcor
 	s390_base_pgm_handler_fn = early_pgm_check_handler;
 }
 
+static __init void detect_mvpg(void)
+{
+#ifndef CONFIG_64BIT
+	int rc;
+
+	asm volatile(
+		"	la	0,0\n"
+		"	mvpg	%2,%2\n"
+		"0:	la	%0,0\n"
+		"1:\n"
+		EX_TABLE(0b,1b)
+		: "=d" (rc) : "0" (-EOPNOTSUPP), "a" (0) : "memory", "cc", "0");
+	if (!rc)
+		machine_flags |= MACHINE_FLAG_MVPG;
+#endif
+}
+
+static __init void detect_ieee(void)
+{
+#ifndef CONFIG_64BIT
+	int rc, tmp;
+
+	asm volatile(
+		"	efpc	%1,0\n"
+		"0:	la	%0,0\n"
+		"1:\n"
+		EX_TABLE(0b,1b)
+		: "=d" (rc), "=d" (tmp): "0" (-EOPNOTSUPP) : "cc");
+	if (!rc)
+		machine_flags |= MACHINE_FLAG_IEEE;
+#endif
+}
+
+static __init void detect_csp(void)
+{
+#ifndef CONFIG_64BIT
+	int rc;
+
+	asm volatile(
+		"	la	0,0\n"
+		"	la	1,0\n"
+		"	la	2,4\n"
+		"	csp	0,2\n"
+		"0:	la	%0,0\n"
+		"1:\n"
+		EX_TABLE(0b,1b)
+		: "=d" (rc) : "0" (-EOPNOTSUPP) : "cc", "0", "1", "2");
+	if (!rc)
+		machine_flags |= MACHINE_FLAG_CSP;
+#endif
+}
+
+static __init void detect_diag9c(void)
+{
+	unsigned int cpu_address;
+	int rc;
+
+	cpu_address = stap();
+	asm volatile(
+		"	diag	%2,0,0x9c\n"
+		"0:	la	%0,0\n"
+		"1:\n"
+		EX_TABLE(0b,1b)
+		: "=d" (rc) : "0" (-EOPNOTSUPP), "d" (cpu_address) : "cc");
+	if (!rc)
+		machine_flags |= MACHINE_FLAG_DIAG9C;
+}
+
+static __init void detect_diag44(void)
+{
+#ifdef CONFIG_64BIT
+	int rc;
+
+	asm volatile(
+		"	diag	0,0,0x44\n"
+		"0:	la	%0,0\n"
+		"1:\n"
+		EX_TABLE(0b,1b)
+		: "=d" (rc) : "0" (-EOPNOTSUPP) : "cc");
+	if (!rc)
+		machine_flags |= MACHINE_FLAG_DIAG44;
+#endif
+}
+
+static __init void detect_machine_facilities(void)
+{
+#ifdef CONFIG_64BIT
+	unsigned int facilities;
+
+	facilities = stfl();
+	if (facilities & (1 << 28))
+		machine_flags |= MACHINE_FLAG_IDTE;
+	if (facilities & (1 << 4))
+		machine_flags |= MACHINE_FLAG_MVCOS;
+#endif
+}
+
 /*
  * Save ipl parameters, clear bss memory, initialize storage keys
  * and create a kernel NSS at startup if the SAVESYS= parm is defined

@@ -285,6 +382,12 @@ void __init startup_init(void)
 	create_kernel_nss();
 	sort_main_extable();
 	setup_lowcore_early();
+	detect_mvpg();
+	detect_ieee();
+	detect_csp();
+	detect_diag9c();
+	detect_diag44();
+	detect_machine_facilities();
 	sclp_read_info_early();
 	sclp_facilities_detect();
 	memsize = sclp_memory_detect();

Index: quilt-2.6/arch/s390/kernel/setup.c
===================================================================
@@ -73,7 +73,7 @@ EXPORT_SYMBOL(uaccess);
 unsigned int console_mode = 0;
 unsigned int console_devno = -1;
 unsigned int console_irq = -1;
-unsigned long machine_flags = 0;
+unsigned long machine_flags;
 unsigned long elf_hwcap = 0;
 char elf_platform[ELF_PLATFORM_SIZE];
 

Index: quilt-2.6/include/asm-s390/setup.h
===================================================================
@@ -59,23 +59,36 @@ extern unsigned int s390_noexec;
  */
 extern unsigned long machine_flags;
 
-#define MACHINE_IS_VM		(machine_flags & 1)
-#define MACHINE_IS_P390		(machine_flags & 4)
-#define MACHINE_HAS_MVPG	(machine_flags & 16)
-#define MACHINE_IS_KVM		(machine_flags & 64)
-#define MACHINE_HAS_IDTE	(machine_flags & 128)
-#define MACHINE_HAS_DIAG9C	(machine_flags & 256)
+#define MACHINE_FLAG_VM		(1UL << 0)
+#define MACHINE_FLAG_IEEE	(1UL << 1)
+#define MACHINE_FLAG_P390	(1UL << 2)
+#define MACHINE_FLAG_CSP	(1UL << 3)
+#define MACHINE_FLAG_MVPG	(1UL << 4)
+#define MACHINE_FLAG_DIAG44	(1UL << 5)
+#define MACHINE_FLAG_IDTE	(1UL << 6)
+#define MACHINE_FLAG_DIAG9C	(1UL << 7)
+#define MACHINE_FLAG_MVCOS	(1UL << 8)
+#define MACHINE_FLAG_KVM	(1UL << 9)
+
+#define MACHINE_IS_VM		(machine_flags & MACHINE_FLAG_VM)
+#define MACHINE_IS_KVM		(machine_flags & MACHINE_FLAG_KVM)
+#define MACHINE_IS_P390		(machine_flags & MACHINE_FLAG_P390)
+#define MACHINE_HAS_DIAG9C	(machine_flags & MACHINE_FLAG_DIAG9C)
 
 #ifndef __s390x__
-#define MACHINE_HAS_IEEE	(machine_flags & 2)
-#define MACHINE_HAS_CSP		(machine_flags & 8)
+#define MACHINE_HAS_IEEE	(machine_flags & MACHINE_FLAG_IEEE)
+#define MACHINE_HAS_CSP		(machine_flags & MACHINE_FLAG_CSP)
+#define MACHINE_HAS_IDTE	(0)
 #define MACHINE_HAS_DIAG44	(1)
+#define MACHINE_HAS_MVPG	(machine_flags & MACHINE_FLAG_MVPG)
 #define MACHINE_HAS_MVCOS	(0)
 #else /* __s390x__ */
 #define MACHINE_HAS_IEEE	(1)
 #define MACHINE_HAS_CSP		(1)
-#define MACHINE_HAS_DIAG44	(machine_flags & 32)
-#define MACHINE_HAS_MVCOS	(machine_flags & 512)
+#define MACHINE_HAS_IDTE	(machine_flags & MACHINE_FLAG_IDTE)
+#define MACHINE_HAS_DIAG44	(machine_flags & MACHINE_FLAG_DIAG44)
+#define MACHINE_HAS_MVPG	(1)
+#define MACHINE_HAS_MVCOS	(machine_flags & MACHINE_FLAG_MVCOS)
 #endif /* __s390x__ */
 
 #define MACHINE_HAS_SCLP	(!MACHINE_IS_P390)

Index: quilt-2.6/include/asm-s390/smp.h
===================================================================
@@ -19,6 +19,7 @@
 #include <asm/lowcore.h>
 #include <asm/sigp.h>
 #include <asm/ptrace.h>
+#include <asm/system.h>
 
 /*
   s390 specific smp.c headers

@@ -53,10 +54,7 @@ extern void machine_power_off_smp(void);
 
 static inline __u16 hard_smp_processor_id(void)
 {
-        __u16 cpu_address;
- 
-	asm volatile("stap %0" : "=m" (cpu_address));
-        return cpu_address;
+	return stap();
 }
 
 /*

Index: quilt-2.6/include/asm-s390/system.h
===================================================================
@@ -432,6 +432,14 @@ static inline unsigned int stfl(void)
 	return S390_lowcore.stfl_fac_list;
 }
 
+static inline unsigned short stap(void)
+{
+	unsigned short cpu_address;
+
+	asm volatile("stap %0" : "=m" (cpu_address));
+	return cpu_address;
+}
+
 extern void (*_machine_restart)(char *command);
 extern void (*_machine_halt)(void);
 extern void (*_machine_power_off)(void);

Index: quilt-2.6/arch/s390/kernel/early.c
===================================================================
@@ -268,6 +268,19 @@ static noinline __init void setup_lowcor
 	s390_base_pgm_handler_fn = early_pgm_check_handler;
 }
 
+static noinline __init void setup_hpage(void)
+{
+#ifndef CONFIG_DEBUG_PAGEALLOC
+	unsigned int facilities;
+
+	facilities = stfl();
+	if (!(facilities & (1UL << 23)) || !(facilities & (1UL << 29)))
+		return;
+	machine_flags |= MACHINE_FLAG_HPAGE;
+	__ctl_set_bit(0, 23);
+#endif
+}
+
 static __init void detect_mvpg(void)
 {
 #ifndef CONFIG_64BIT

@@ -360,6 +373,8 @@ static __init void detect_machine_facili
 	facilities = stfl();
 	if (facilities & (1 << 28))
 		machine_flags |= MACHINE_FLAG_IDTE;
+	if (facilities & (1 << 23))
+		machine_flags |= MACHINE_FLAG_PFMF;
 	if (facilities & (1 << 4))
 		machine_flags |= MACHINE_FLAG_MVCOS;
 #endif

@@ -388,6 +403,7 @@ void __init startup_init(void)
 	detect_diag9c();
 	detect_diag44();
 	detect_machine_facilities();
+	setup_hpage();
 	sclp_read_info_early();
 	sclp_facilities_detect();
 	memsize = sclp_memory_detect();

Index: quilt-2.6/arch/s390/kernel/setup.c
===================================================================
@@ -749,6 +749,9 @@ static void __init setup_hwcaps(void)
 			elf_hwcap |= 1UL << 6;
 	}
 
+	if (MACHINE_HAS_HPAGE)
+		elf_hwcap |= 1UL << 7;
+
 	switch (cpuinfo->cpu_id.machine) {
 	case 0x9672:
 #if !defined(CONFIG_64BIT)

@@ -872,8 +875,9 @@ void __cpuinit print_cpu_info(struct cpu
 
 static int show_cpuinfo(struct seq_file *m, void *v)
 {
-	static const char *hwcap_str[7] = {
-		"esan3", "zarch", "stfle", "msa", "ldisp", "eimm", "dfp"
+	static const char *hwcap_str[8] = {
+		"esan3", "zarch", "stfle", "msa", "ldisp", "eimm", "dfp",
+		"edat"
 	};
         struct cpuinfo_S390 *cpuinfo;
 	unsigned long n = (unsigned long) v - 1;

@@ -888,7 +892,7 @@ static int show_cpuinfo(struct seq_file 
 			       num_online_cpus(), loops_per_jiffy/(500000/HZ),
 			       (loops_per_jiffy/(5000/HZ))%100);
 		seq_puts(m, "features\t: ");
-		for (i = 0; i < 7; i++)
+		for (i = 0; i < 8; i++)
 			if (hwcap_str[i] && (elf_hwcap & (1UL << i)))
 				seq_printf(m, "%s ", hwcap_str[i]);
 		seq_puts(m, "\n");

Index: quilt-2.6/arch/s390/mm/fault.c
===================================================================
@@ -28,6 +28,7 @@
 #include <linux/hardirq.h>
 #include <linux/kprobes.h>
 #include <linux/uaccess.h>
+#include <linux/hugetlb.h>
 #include <asm/system.h>
 #include <asm/pgtable.h>
 #include <asm/s390_ext.h>

@@ -367,6 +368,8 @@ good_area:
 	}
 
 survive:
+	if (is_vm_hugetlb_page(vma))
+		address &= HPAGE_MASK;
 	/*
 	 * If for any reason at all we couldn't handle the fault,
 	 * make sure we exit gracefully rather than endlessly redo

134 lines not on this page · raw message

Index: quilt-2.6/arch/s390/mm/init.c
===================================================================
@@ -77,28 +77,6 @@ void show_mem(void)
 	printk("%lu pages pagetables\n", global_page_state(NR_PAGETABLE));
 }
 
-static void __init setup_ro_region(void)
-{
-	pgd_t *pgd;
-	pud_t *pud;
-	pmd_t *pmd;
-	pte_t *pte;
-	pte_t new_pte;
-	unsigned long address, end;
-
-	address = ((unsigned long)&_stext) & PAGE_MASK;
-	end = PFN_ALIGN((unsigned long)&_eshared);
-
-	for (; address < end; address += PAGE_SIZE) {
-		pgd = pgd_offset_k(address);
-		pud = pud_offset(pgd, address);
-		pmd = pmd_offset(pud, address);
-		pte = pte_offset_kernel(pmd, address);
-		new_pte = mk_pte_phys(address, __pgprot(_PAGE_RO));
-		*pte = new_pte;
-	}
-}
-
 /*
  * paging_init() sets up the page tables
  */

@@ -121,7 +99,6 @@ void __init paging_init(void)
 	clear_table((unsigned long *) init_mm.pgd, pgd_type,
 		    sizeof(unsigned long)*2048);
 	vmem_map_init();
-	setup_ro_region();
 
         /* enable virtual mapping in kernel mode */
 	__ctl_load(S390_lowcore.kernel_asce, 1, 1);

120 lines not on this page · raw message

183 lines not on this page · raw message

Index: quilt-2.6/include/asm-s390/page.h
===================================================================
@@ -19,17 +19,34 @@
 #define PAGE_DEFAULT_ACC	0
 #define PAGE_DEFAULT_KEY	(PAGE_DEFAULT_ACC << 4)
 
+#define HPAGE_SHIFT	20
+#define HPAGE_SIZE	(1UL << HPAGE_SHIFT)
+#define HPAGE_MASK	(~(HPAGE_SIZE - 1))
+#define HUGETLB_PAGE_ORDER	(HPAGE_SHIFT - PAGE_SHIFT)
+
+#define ARCH_HAS_SETCLEAR_HUGE_PTE
+#define ARCH_HAS_HUGE_PTE_TYPE
+#define ARCH_HAS_PREPARE_HUGEPAGE
+#define ARCH_HAS_HUGEPAGE_CLEAR_FLUSH
+
 #include <asm/setup.h>
 #ifndef __ASSEMBLY__
 
 static inline void clear_page(void *page)
 {
-	register unsigned long reg1 asm ("1") = 0;
-	register void *reg2 asm ("2") = page;
-	register unsigned long reg3 asm ("3") = 4096;
-	asm volatile(
-		"	mvcl	2,0"
-		: "+d" (reg2), "+d" (reg3) : "d" (reg1) : "memory", "cc");
+	if (MACHINE_HAS_PFMF) {
+		asm volatile(
+			"	.insn	rre,0xb9af0000,%0,%1"
+			: : "d" (0x10000), "a" (page) : "memory", "cc");
+	} else {
+		register unsigned long reg1 asm ("1") = 0;
+		register void *reg2 asm ("2") = page;
+		register unsigned long reg3 asm ("3") = 4096;
+		asm volatile(
+			"	mvcl	2,0"
+			: "+d" (reg2), "+d" (reg3) : "d" (reg1)
+			: "memory", "cc");
+	}
 }
 
 static inline void copy_page(void *to, void *from)

Index: quilt-2.6/include/asm-s390/pgtable.h
===================================================================
@@ -234,6 +234,15 @@ extern char empty_zero_page[PAGE_SIZE];
 #define _PAGE_TYPE_EX_RW	0x002
 
 /*
+ * Only four types for huge pages, using the invalid bit and protection bit
+ * of a segment table entry.
+ */
+#define _HPAGE_TYPE_EMPTY	0x020	/* _SEGMENT_ENTRY_INV */
+#define _HPAGE_TYPE_NONE	0x220
+#define _HPAGE_TYPE_RO		0x200	/* _SEGMENT_ENTRY_RO  */
+#define _HPAGE_TYPE_RW		0x000
+
+/*
  * PTE type bits are rather complicated. handle_pte_fault uses pte_present,
  * pte_none and pte_file to find out the pte type WITHOUT holding the page
  * table lock. ptep_clear_flush on the other hand uses ptep_clear_flush to

@@ -325,6 +334,9 @@ extern char empty_zero_page[PAGE_SIZE];
 #define _SEGMENT_ENTRY		(0)
 #define _SEGMENT_ENTRY_EMPTY	(_SEGMENT_ENTRY_INV)
 
+#define _SEGMENT_ENTRY_LARGE	0x400	/* STE-format control, large page   */
+#define _SEGMENT_ENTRY_CO	0x100	/* change-recording override   */
+
 #endif /* __s390x__ */
 
 /*

Index: quilt-2.6/include/asm-s390/setup.h
===================================================================
@@ -69,6 +69,8 @@ extern unsigned long machine_flags;
 #define MACHINE_FLAG_DIAG9C	(1UL << 7)
 #define MACHINE_FLAG_MVCOS	(1UL << 8)
 #define MACHINE_FLAG_KVM	(1UL << 9)
+#define MACHINE_FLAG_HPAGE	(1UL << 10)
+#define MACHINE_FLAG_PFMF	(1UL << 11)
 
 #define MACHINE_IS_VM		(machine_flags & MACHINE_FLAG_VM)
 #define MACHINE_IS_KVM		(machine_flags & MACHINE_FLAG_KVM)

@@ -82,6 +84,8 @@ extern unsigned long machine_flags;
 #define MACHINE_HAS_DIAG44	(1)
 #define MACHINE_HAS_MVPG	(machine_flags & MACHINE_FLAG_MVPG)
 #define MACHINE_HAS_MVCOS	(0)
+#define MACHINE_HAS_HPAGE	(0)
+#define MACHINE_HAS_PFMF	(0)
 #else /* __s390x__ */
 #define MACHINE_HAS_IEEE	(1)
 #define MACHINE_HAS_CSP		(1)

@@ -89,6 +93,8 @@ extern unsigned long machine_flags;
 #define MACHINE_HAS_DIAG44	(machine_flags & MACHINE_FLAG_DIAG44)
 #define MACHINE_HAS_MVPG	(1)
 #define MACHINE_HAS_MVCOS	(machine_flags & MACHINE_FLAG_MVCOS)
+#define MACHINE_HAS_HPAGE	(machine_flags & MACHINE_FLAG_HPAGE)
+#define MACHINE_HAS_PFMF	(machine_flags & MACHINE_FLAG_PFMF)
 #endif /* __s390x__ */
 
 #define MACHINE_HAS_SCLP	(!MACHINE_IS_P390)

Index: quilt-2.6/include/asm-s390/tlbflush.h
===================================================================
@@ -2,6 +2,7 @@
 #define _S390_TLBFLUSH_H
 
 #include <linux/mm.h>
+#include <linux/sched.h>
 #include <asm/processor.h>
 #include <asm/pgalloc.h>
 

Index: quilt-2.6/arch/s390/mm/extmem.c
===================================================================
@@ -287,7 +287,7 @@ __segment_load (char *name, int do_nonsh
 	if (rc < 0)
 		goto out_free;
 
-	rc = add_shared_memory(seg->start_addr, seg->end - seg->start_addr + 1);
+	rc = vmem_add_mapping(seg->start_addr, seg->end - seg->start_addr + 1);
 
 	if (rc)
 		goto out_free;

@@ -351,7 +351,7 @@ __segment_load (char *name, int do_nonsh
 	release_resource(seg->res);
 	kfree(seg->res);
  out_shared:
-	remove_shared_memory(seg->start_addr, seg->end - seg->start_addr + 1);
+	vmem_remove_mapping(seg->start_addr, seg->end - seg->start_addr + 1);
  out_free:
 	kfree(seg);
  out:

@@ -474,7 +474,7 @@ segment_modify_shared (char *name, int d
 	rc = 0;
 	goto out_unlock;
  out_del:
-	remove_shared_memory(seg->start_addr, seg->end - seg->start_addr + 1);
+	vmem_remove_mapping(seg->start_addr, seg->end - seg->start_addr + 1);
 	list_del(&seg->list);
 	dcss_diag(DCSS_PURGESEG, seg->dcss_name, &dummy, &dummy);
 	kfree(seg);

@@ -508,7 +508,7 @@ segment_unload(char *name)
 		goto out_unlock;
 	release_resource(seg->res);
 	kfree(seg->res);
-	remove_shared_memory(seg->start_addr, seg->end - seg->start_addr + 1);
+	vmem_remove_mapping(seg->start_addr, seg->end - seg->start_addr + 1);
 	list_del(&seg->list);
 	dcss_diag(DCSS_PURGESEG, seg->dcss_name, &dummy, &dummy);
 	kfree(seg);

Index: quilt-2.6/arch/s390/mm/init.c
===================================================================
@@ -106,6 +106,8 @@ void __init paging_init(void)
 	__ctl_load(S390_lowcore.kernel_asce, 13, 13);
 	__raw_local_irq_ssm(ssm_mask);
 
+	sparse_memory_present_with_active_regions(MAX_NUMNODES);
+	sparse_init();
 	memset(max_zone_pfns, 0, sizeof(max_zone_pfns));
 #ifdef CONFIG_ZONE_DMA
 	max_zone_pfns[ZONE_DMA] = PFN_DOWN(MAX_DMA_ADDRESS);

139 lines not on this page · raw message

Index: quilt-2.6/drivers/s390/kvm/kvm_virtio.c
===================================================================
@@ -17,6 +17,7 @@
 #include <linux/virtio_config.h>
 #include <linux/interrupt.h>
 #include <linux/virtio_ring.h>
+#include <linux/pfn.h>
 #include <asm/io.h>
 #include <asm/kvm_para.h>
 #include <asm/kvm_virtio.h>

@@ -180,11 +181,10 @@ static struct virtqueue *kvm_find_vq(str
 
 	config = kvm_vq_config(kdev->desc)+index;
 
-	if (add_shared_memory(config->address,
-				vring_size(config->num, PAGE_SIZE))) {
-		err = -ENOMEM;
+	err = vmem_add_mapping(config->address,
+			       vring_size(config->num, PAGE_SIZE));
+	if (err)
 		goto out;
-	}
 
 	vq = vring_new_virtqueue(config->num, vdev, (void *) config->address,
 				 kvm_notify, callback);

@@ -202,8 +202,8 @@ static struct virtqueue *kvm_find_vq(str
 	vq->priv = config;
 	return vq;
 unmap:
-	remove_shared_memory(config->address, vring_size(config->num,
-			     PAGE_SIZE));
+	vmem_remove_mapping(config->address,
+			    vring_size(config->num, PAGE_SIZE));
 out:
 	return ERR_PTR(err);
 }

@@ -213,8 +213,8 @@ static void kvm_del_vq(struct virtqueue 
 	struct kvm_vqconfig *config = vq->priv;
 
 	vring_del_virtqueue(vq);
-	remove_shared_memory(config->address,
-			     vring_size(config->num, PAGE_SIZE));
+	vmem_remove_mapping(config->address,
+			    vring_size(config->num, PAGE_SIZE));
 }
 
 /*

@@ -318,12 +318,13 @@ static int __init kvm_devices_init(void)
 		return rc;
 	}
 
-	if (add_shared_memory((max_pfn) << PAGE_SHIFT, PAGE_SIZE)) {
+	rc = vmem_add_mapping(PFN_PHYS(max_pfn), PAGE_SIZE);
+	if (rc) {
 		device_unregister(&kvm_root);
-		return -ENOMEM;
+		return rc;
 	}
 
-	kvm_devices  = (void *) (max_pfn << PAGE_SHIFT);
+	kvm_devices = (void *) PFN_PHYS(max_pfn);
 
 	ctl_set_bit(0, 9);
 	register_external_interrupt(0x2603, kvm_extint_handler);

Index: quilt-2.6/include/asm-s390/page.h
===================================================================
@@ -125,26 +125,6 @@ page_get_storage_key(unsigned long addr)
 	return skey;
 }
 
-extern unsigned long max_pfn;
-
-static inline int pfn_valid(unsigned long pfn)
-{
-	unsigned long dummy;
-	int ccode;
-
-	if (pfn >= max_pfn)
-		return 0;
-
-	asm volatile(
-		"	lra	%0,0(%2)\n"
-		"	ipm	%1\n"
-		"	srl	%1,28\n"
-		: "=d" (dummy), "=d" (ccode)
-		: "a" (pfn << PAGE_SHIFT)
-		: "cc");
-	return !ccode;
-}
-
 #endif /* !__ASSEMBLY__ */
 
 /* to align the pointer to the (next) page boundary */

Index: quilt-2.6/include/asm-s390/pgtable.h
===================================================================
@@ -129,7 +129,7 @@ extern char empty_zero_page[PAGE_SIZE];
 #define VMEM_MAX_PAGES	((VMEM_MAP_END - VMALLOC_END) / sizeof(struct page))
 #define VMEM_MAX_PFN	min(VMALLOC_START >> PAGE_SHIFT, VMEM_MAX_PAGES)
 #define VMEM_MAX_PHYS	((VMEM_MAX_PFN << PAGE_SHIFT) & ~((16 << 20) - 1))
-#define VMEM_MAP	((struct page *) VMALLOC_END)
+#define vmemmap		((struct page *) VMALLOC_END)
 
 /*
  * A 31 bit pagetable entry of S390 has following format:

@@ -1075,8 +1075,8 @@ static inline pte_t mk_swap_pte(unsigned
 
 #define kern_addr_valid(addr)   (1)
 
-extern int add_shared_memory(unsigned long start, unsigned long size);
-extern int remove_shared_memory(unsigned long start, unsigned long size);
+extern int vmem_add_mapping(unsigned long start, unsigned long size);
+extern int vmem_remove_mapping(unsigned long start, unsigned long size);
 extern int s390_enable_sie(void);
 
 /*

@@ -1084,9 +1084,6 @@ extern int s390_enable_sie(void);
  */
 #define pgtable_cache_init()	do { } while (0)
 
-#define __HAVE_ARCH_MEMMAP_INIT
-extern void memmap_init(unsigned long, int, unsigned long, unsigned long);
-
 #include <asm-generic/pgtable.h>
 
 #endif /* _S390_PAGE_H */

Index: quilt-2.6/include/asm-s390/sparsemem.h
===================================================================
@@ -0,0 +1,18 @@
+#ifndef _ASM_S390_SPARSEMEM_H
+#define _ASM_S390_SPARSEMEM_H
+
+#define SECTION_SIZE_BITS	25
+
+#ifdef CONFIG_64BIT
+
+#define MAX_PHYSADDR_BITS	42
+#define MAX_PHYSMEM_BITS	42
+
+#else
+
+#define MAX_PHYSADDR_BITS	31
+#define MAX_PHYSMEM_BITS	31
+
+#endif /* CONFIG_64BIT */
+
+#endif /* _ASM_S390_SPARSEMEM_H */