19 files changed, 850 insertions, 568 deletions

diff --git a/drivers/s390/char/Makefile b/drivers/s390/char/Makefile
index 130de19916f..7e73e39a174 100644
--- a/drivers/s390/char/Makefile
+++ b/drivers/s390/char/Makefile
@@ -3,7 +3,7 @@
 #
 
 obj-y += ctrlchar.o keyboard.o defkeymap.o sclp.o sclp_rw.o sclp_quiesce.o \
-	 sclp_info.o sclp_config.o sclp_chp.o
+	 sclp_cmd.o sclp_config.o sclp_cpi_sys.o
 
 obj-$(CONFIG_TN3270) += raw3270.o
 obj-$(CONFIG_TN3270_CONSOLE) += con3270.o
diff --git a/drivers/s390/char/monwriter.c b/drivers/s390/char/monwriter.c
index 20442fbf934..a86c0534cd4 100644
--- a/drivers/s390/char/monwriter.c
+++ b/drivers/s390/char/monwriter.c
@@ -295,7 +295,7 @@ module_init(mon_init);
 module_exit(mon_exit);
 
 module_param_named(max_bufs, mon_max_bufs, int, 0644);
-MODULE_PARM_DESC(max_bufs, "Maximum number of sample monitor data buffers"
+MODULE_PARM_DESC(max_bufs, "Maximum number of sample monitor data buffers "
 		 "that can be active at one time");
 
 MODULE_AUTHOR("Melissa Howland <Melissa.Howland@us.ibm.com>");
diff --git a/drivers/s390/char/raw3270.c b/drivers/s390/char/raw3270.c
index 8d1c64a24de..0d98f1ff2ed 100644
--- a/drivers/s390/char/raw3270.c
+++ b/drivers/s390/char/raw3270.c
@@ -66,7 +66,7 @@ struct raw3270 {
 static DEFINE_MUTEX(raw3270_mutex);
 
 /* List of 3270 devices. */
-static struct list_head raw3270_devices = LIST_HEAD_INIT(raw3270_devices);
+static LIST_HEAD(raw3270_devices);
 
 /*
  * Flag to indicate if the driver has been registered. Some operations
@@ -1210,7 +1210,7 @@ struct raw3270_notifier {
 	void (*notifier)(int, int);
 };
 
-static struct list_head raw3270_notifier = LIST_HEAD_INIT(raw3270_notifier);
+static LIST_HEAD(raw3270_notifier);
 
 int raw3270_register_notifier(void (*notifier)(int, int))
 {
diff --git a/drivers/s390/char/sclp.h b/drivers/s390/char/sclp.h
index c7318a12585..aa8186d18ae 100644
--- a/drivers/s390/char/sclp.h
+++ b/drivers/s390/char/sclp.h
@@ -56,8 +56,6 @@ typedef unsigned int sclp_cmdw_t;
 #define SCLP_CMDW_READ_EVENT_DATA	0x00770005
 #define SCLP_CMDW_WRITE_EVENT_DATA	0x00760005
 #define SCLP_CMDW_WRITE_EVENT_MASK	0x00780005
-#define SCLP_CMDW_READ_SCP_INFO		0x00020001
-#define SCLP_CMDW_READ_SCP_INFO_FORCED	0x00120001
 
 #define GDS_ID_MDSMU		0x1310
 #define GDS_ID_MDSROUTEINFO	0x1311
@@ -83,6 +81,8 @@ extern u64 sclp_facilities;
 
 #define SCLP_HAS_CHP_INFO	(sclp_facilities & 0x8000000000000000ULL)
 #define SCLP_HAS_CHP_RECONFIG	(sclp_facilities & 0x2000000000000000ULL)
+#define SCLP_HAS_CPU_INFO	(sclp_facilities & 0x0800000000000000ULL)
+#define SCLP_HAS_CPU_RECONFIG	(sclp_facilities & 0x0400000000000000ULL)
 
 struct gds_subvector {
 	u8	length;
diff --git a/drivers/s390/char/sclp_chp.c b/drivers/s390/char/sclp_chp.c
deleted file mode 100644
index c68f5e7e63a..00000000000
--- a/drivers/s390/char/sclp_chp.c
+++ /dev/null
@@ -1,200 +0,0 @@
-/*
- *  drivers/s390/char/sclp_chp.c
- *
- *    Copyright IBM Corp. 2007
- *    Author(s): Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
- */
-
-#include <linux/types.h>
-#include <linux/gfp.h>
-#include <linux/errno.h>
-#include <linux/completion.h>
-#include <asm/sclp.h>
-#include <asm/chpid.h>
-
-#include "sclp.h"
-
-#define TAG	"sclp_chp: "
-
-#define SCLP_CMDW_CONFIGURE_CHANNEL_PATH	0x000f0001
-#define SCLP_CMDW_DECONFIGURE_CHANNEL_PATH	0x000e0001
-#define SCLP_CMDW_READ_CHANNEL_PATH_INFORMATION	0x00030001
-
-static inline sclp_cmdw_t get_configure_cmdw(struct chp_id chpid)
-{
-	return SCLP_CMDW_CONFIGURE_CHANNEL_PATH | chpid.id << 8;
-}
-
-static inline sclp_cmdw_t get_deconfigure_cmdw(struct chp_id chpid)
-{
-	return SCLP_CMDW_DECONFIGURE_CHANNEL_PATH | chpid.id << 8;
-}
-
-static void chp_callback(struct sclp_req *req, void *data)
-{
-	struct completion *completion = data;
-
-	complete(completion);
-}
-
-struct chp_cfg_sccb {
-	struct sccb_header header;
-	u8 ccm;
-	u8 reserved[6];
-	u8 cssid;
-} __attribute__((packed));
-
-struct chp_cfg_data {
-	struct chp_cfg_sccb sccb;
-	struct sclp_req req;
-	struct completion completion;
-} __attribute__((packed));
-
-static int do_configure(sclp_cmdw_t cmd)
-{
-	struct chp_cfg_data *data;
-	int rc;
-
-	if (!SCLP_HAS_CHP_RECONFIG)
-		return -EOPNOTSUPP;
-	/* Prepare sccb. */
-	data = (struct chp_cfg_data *) get_zeroed_page(GFP_KERNEL | GFP_DMA);
-	if (!data)
-		return -ENOMEM;
-	data->sccb.header.length = sizeof(struct chp_cfg_sccb);
-	data->req.command = cmd;
-	data->req.sccb = &(data->sccb);
-	data->req.status = SCLP_REQ_FILLED;
-	data->req.callback = chp_callback;
-	data->req.callback_data = &(data->completion);
-	init_completion(&data->completion);
-
-	/* Perform sclp request. */
-	rc = sclp_add_request(&(data->req));
-	if (rc)
-		goto out;
-	wait_for_completion(&data->completion);
-
-	/* Check response .*/
-	if (data->req.status != SCLP_REQ_DONE) {
-		printk(KERN_WARNING TAG "configure channel-path request failed "
-		       "(status=0x%02x)\n", data->req.status);
-		rc = -EIO;
-		goto out;
-	}
-	switch (data->sccb.header.response_code) {
-	case 0x0020:
-	case 0x0120:
-	case 0x0440:
-	case 0x0450:
-		break;
-	default:
-		printk(KERN_WARNING TAG "configure channel-path failed "
-		       "(cmd=0x%08x, response=0x%04x)\n", cmd,
-		       data->sccb.header.response_code);
-		rc = -EIO;
-		break;
-	}
-out:
-	free_page((unsigned long) data);
-
-	return rc;
-}
-
-/**
- * sclp_chp_configure - perform configure channel-path sclp command
- * @chpid: channel-path ID
- *
- * Perform configure channel-path command sclp command for specified chpid.
- * Return 0 after command successfully finished, non-zero otherwise.
- */
-int sclp_chp_configure(struct chp_id chpid)
-{
-	return do_configure(get_configure_cmdw(chpid));
-}
-
-/**
- * sclp_chp_deconfigure - perform deconfigure channel-path sclp command
- * @chpid: channel-path ID
- *
- * Perform deconfigure channel-path command sclp command for specified chpid
- * and wait for completion. On success return 0. Return non-zero otherwise.
- */
-int sclp_chp_deconfigure(struct chp_id chpid)
-{
-	return do_configure(get_deconfigure_cmdw(chpid));
-}
-
-struct chp_info_sccb {
-	struct sccb_header header;
-	u8 recognized[SCLP_CHP_INFO_MASK_SIZE];
-	u8 standby[SCLP_CHP_INFO_MASK_SIZE];
-	u8 configured[SCLP_CHP_INFO_MASK_SIZE];
-	u8 ccm;
-	u8 reserved[6];
-	u8 cssid;
-} __attribute__((packed));
-
-struct chp_info_data {
-	struct chp_info_sccb sccb;
-	struct sclp_req req;
-	struct completion completion;
-} __attribute__((packed));
-
-/**
- * sclp_chp_read_info - perform read channel-path information sclp command
- * @info: resulting channel-path information data
- *
- * Perform read channel-path information sclp command and wait for completion.
- * On success, store channel-path information in @info and return 0. Return
- * non-zero otherwise.
- */
-int sclp_chp_read_info(struct sclp_chp_info *info)
-{
-	struct chp_info_data *data;
-	int rc;
-
-	if (!SCLP_HAS_CHP_INFO)
-		return -EOPNOTSUPP;
-	/* Prepare sccb. */
-	data = (struct chp_info_data *) get_zeroed_page(GFP_KERNEL | GFP_DMA);
-	if (!data)
-		return -ENOMEM;
-	data->sccb.header.length = sizeof(struct chp_info_sccb);
-	data->req.command = SCLP_CMDW_READ_CHANNEL_PATH_INFORMATION;
-	data->req.sccb = &(data->sccb);
-	data->req.status = SCLP_REQ_FILLED;
-	data->req.callback = chp_callback;
-	data->req.callback_data = &(data->completion);
-	init_completion(&data->completion);
-
-	/* Perform sclp request. */
-	rc = sclp_add_request(&(data->req));
-	if (rc)
-		goto out;
-	wait_for_completion(&data->completion);
-
-	/* Check response .*/
-	if (data->req.status != SCLP_REQ_DONE) {
-		printk(KERN_WARNING TAG "read channel-path info request failed "
-		       "(status=0x%02x)\n", data->req.status);
-		rc = -EIO;
-		goto out;
-	}
-	if (data->sccb.header.response_code != 0x0010) {
-		printk(KERN_WARNING TAG "read channel-path info failed "
-		       "(response=0x%04x)\n", data->sccb.header.response_code);
-		rc = -EIO;
-		goto out;
-	}
-	memcpy(info->recognized, data->sccb.recognized,
-	       SCLP_CHP_INFO_MASK_SIZE);
-	memcpy(info->standby, data->sccb.standby,
-	       SCLP_CHP_INFO_MASK_SIZE);
-	memcpy(info->configured, data->sccb.configured,
-	       SCLP_CHP_INFO_MASK_SIZE);
-out:
-	free_page((unsigned long) data);
-
-	return rc;
-}
diff --git a/drivers/s390/char/sclp_cmd.c b/drivers/s390/char/sclp_cmd.c
new file mode 100644
index 00000000000..b5c23396f8f
--- /dev/null
+++ b/drivers/s390/char/sclp_cmd.c
@@ -0,0 +1,398 @@
+/*
+ *  drivers/s390/char/sclp_cmd.c
+ *
+ *    Copyright IBM Corp. 2007
+ *    Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>,
+ *		 Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
+ */
+
+#include <linux/completion.h>
+#include <linux/init.h>
+#include <linux/errno.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <asm/chpid.h>
+#include <asm/sclp.h>
+#include "sclp.h"
+
+#define TAG	"sclp_cmd: "
+
+#define SCLP_CMDW_READ_SCP_INFO		0x00020001
+#define SCLP_CMDW_READ_SCP_INFO_FORCED	0x00120001
+
+struct read_info_sccb {
+	struct	sccb_header header;	/* 0-7 */
+	u16	rnmax;			/* 8-9 */
+	u8	rnsize;			/* 10 */
+	u8	_reserved0[24 - 11];	/* 11-15 */
+	u8	loadparm[8];		/* 24-31 */
+	u8	_reserved1[48 - 32];	/* 32-47 */
+	u64	facilities;		/* 48-55 */
+	u8	_reserved2[84 - 56];	/* 56-83 */
+	u8	fac84;			/* 84 */
+	u8	_reserved3[91 - 85];	/* 85-90 */
+	u8	flags;			/* 91 */
+	u8	_reserved4[100 - 92];	/* 92-99 */
+	u32	rnsize2;		/* 100-103 */
+	u64	rnmax2;			/* 104-111 */
+	u8	_reserved5[4096 - 112];	/* 112-4095 */
+} __attribute__((packed, aligned(PAGE_SIZE)));
+
+static struct read_info_sccb __initdata early_read_info_sccb;
+static int __initdata early_read_info_sccb_valid;
+
+u64 sclp_facilities;
+static u8 sclp_fac84;
+
+static int __init sclp_cmd_sync_early(sclp_cmdw_t cmd, void *sccb)
+{
+	int rc;
+
+	__ctl_set_bit(0, 9);
+	rc = sclp_service_call(cmd, sccb);
+	if (rc)
+		goto out;
+	__load_psw_mask(PSW_BASE_BITS | PSW_MASK_EXT |
+			PSW_MASK_WAIT | PSW_DEFAULT_KEY);
+	local_irq_disable();
+out:
+	/* Contents of the sccb might have changed. */
+	barrier();
+	__ctl_clear_bit(0, 9);
+	return rc;
+}
+
+void __init sclp_read_info_early(void)
+{
+	int rc;
+	int i;
+	struct read_info_sccb *sccb;
+	sclp_cmdw_t commands[] = {SCLP_CMDW_READ_SCP_INFO_FORCED,
+				  SCLP_CMDW_READ_SCP_INFO};
+
+	sccb = &early_read_info_sccb;
+	for (i = 0; i < ARRAY_SIZE(commands); i++) {
+		do {
+			memset(sccb, 0, sizeof(*sccb));
+			sccb->header.length = sizeof(*sccb);
+			sccb->header.control_mask[2] = 0x80;
+			rc = sclp_cmd_sync_early(commands[i], sccb);
+		} while (rc == -EBUSY);
+
+		if (rc)
+			break;
+		if (sccb->header.response_code == 0x10) {
+			early_read_info_sccb_valid = 1;
+			break;
+		}
+		if (sccb->header.response_code != 0x1f0)
+			break;
+	}
+}
+
+void __init sclp_facilities_detect(void)
+{
+	if (!early_read_info_sccb_valid)
+		return;
+	sclp_facilities = early_read_info_sccb.facilities;
+	sclp_fac84 = early_read_info_sccb.fac84;
+}
+
+unsigned long long __init sclp_memory_detect(void)
+{
+	unsigned long long memsize;
+	struct read_info_sccb *sccb;
+
+	if (!early_read_info_sccb_valid)
+		return 0;
+	sccb = &early_read_info_sccb;
+	if (sccb->rnsize)
+		memsize = sccb->rnsize << 20;
+	else
+		memsize = sccb->rnsize2 << 20;
+	if (sccb->rnmax)
+		memsize *= sccb->rnmax;
+	else
+		memsize *= sccb->rnmax2;
+	return memsize;
+}
+
+/*
+ * This function will be called after sclp_memory_detect(), which gets called
+ * early from early.c code. Therefore the sccb should have valid contents.
+ */
+void __init sclp_get_ipl_info(struct sclp_ipl_info *info)
+{
+	struct read_info_sccb *sccb;
+
+	if (!early_read_info_sccb_valid)
+		return;
+	sccb = &early_read_info_sccb;
+	info->is_valid = 1;
+	if (sccb->flags & 0x2)
+		info->has_dump = 1;
+	memcpy(&info->loadparm, &sccb->loadparm, LOADPARM_LEN);
+}
+
+static void sclp_sync_callback(struct sclp_req *req, void *data)
+{
+	struct completion *completion = data;
+
+	complete(completion);
+}
+
+static int do_sync_request(sclp_cmdw_t cmd, void *sccb)
+{
+	struct completion completion;
+	struct sclp_req *request;
+	int rc;
+
+	request = kzalloc(sizeof(*request), GFP_KERNEL);
+	if (!request)
+		return -ENOMEM;
+	request->command = cmd;
+	request->sccb = sccb;
+	request->status = SCLP_REQ_FILLED;
+	request->callback = sclp_sync_callback;
+	request->callback_data = &completion;
+	init_completion(&completion);
+
+	/* Perform sclp request. */
+	rc = sclp_add_request(request);
+	if (rc)
+		goto out;
+	wait_for_completion(&completion);
+
+	/* Check response. */
+	if (request->status != SCLP_REQ_DONE) {
+		printk(KERN_WARNING TAG "sync request failed "
+		       "(cmd=0x%08x, status=0x%02x)\n", cmd, request->status);
+		rc = -EIO;
+	}
+out:
+	kfree(request);
+	return rc;
+}
+
+/*
+ * CPU configuration related functions.
+ */
+
+#define SCLP_CMDW_READ_CPU_INFO		0x00010001
+#define SCLP_CMDW_CONFIGURE_CPU		0x00110001
+#define SCLP_CMDW_DECONFIGURE_CPU	0x00100001
+
+struct read_cpu_info_sccb {
+	struct	sccb_header header;
+	u16	nr_configured;
+	u16	offset_configured;
+	u16	nr_standby;
+	u16	offset_standby;
+	u8	reserved[4096 - 16];
+} __attribute__((packed, aligned(PAGE_SIZE)));
+
+static void sclp_fill_cpu_info(struct sclp_cpu_info *info,
+			       struct read_cpu_info_sccb *sccb)
+{
+	char *page = (char *) sccb;
+
+	memset(info, 0, sizeof(*info));
+	info->configured = sccb->nr_configured;
+	info->standby = sccb->nr_standby;
+	info->combined = sccb->nr_configured + sccb->nr_standby;
+	info->has_cpu_type = sclp_fac84 & 0x1;
+	memcpy(&info->cpu, page + sccb->offset_configured,
+	       info->combined * sizeof(struct sclp_cpu_entry));
+}
+
+int sclp_get_cpu_info(struct sclp_cpu_info *info)
+{
+	int rc;
+	struct read_cpu_info_sccb *sccb;
+
+	if (!SCLP_HAS_CPU_INFO)
+		return -EOPNOTSUPP;
+	sccb = (void *) get_zeroed_page(GFP_KERNEL | GFP_DMA);
+	if (!sccb)
+		return -ENOMEM;
+	sccb->header.length = sizeof(*sccb);
+	rc = do_sync_request(SCLP_CMDW_READ_CPU_INFO, sccb);
+	if (rc)
+		goto out;
+	if (sccb->header.response_code != 0x0010) {
+		printk(KERN_WARNING TAG "readcpuinfo failed "
+		       "(response=0x%04x)\n", sccb->header.response_code);
+		rc = -EIO;
+		goto out;
+	}
+	sclp_fill_cpu_info(info, sccb);
+out:
+	free_page((unsigned long) sccb);
+	return rc;
+}
+
+struct cpu_configure_sccb {
+	struct sccb_header header;
+} __attribute__((packed, aligned(8)));
+
+static int do_cpu_configure(sclp_cmdw_t cmd)
+{
+	struct cpu_configure_sccb *sccb;
+	int rc;
+
+	if (!SCLP_HAS_CPU_RECONFIG)
+		return -EOPNOTSUPP;
+	/*
+	 * This is not going to cross a page boundary since we force
+	 * kmalloc to have a minimum alignment of 8 bytes on s390.
+	 */
+	sccb = kzalloc(sizeof(*sccb), GFP_KERNEL | GFP_DMA);
+	if (!sccb)
+		return -ENOMEM;
+	sccb->header.length = sizeof(*sccb);
+	rc = do_sync_request(cmd, sccb);
+	if (rc)
+		goto out;
+	switch (sccb->header.response_code) {
+	case 0x0020:
+	case 0x0120:
+		break;
+	default:
+		printk(KERN_WARNING TAG "configure cpu failed (cmd=0x%08x, "
+		       "response=0x%04x)\n", cmd, sccb->header.response_code);
+		rc = -EIO;
+		break;
+	}
+out:
+	kfree(sccb);
+	return rc;
+}
+
+int sclp_cpu_configure(u8 cpu)
+{
+	return do_cpu_configure(SCLP_CMDW_CONFIGURE_CPU | cpu << 8);
+}
+
+int sclp_cpu_deconfigure(u8 cpu)
+{
+	return do_cpu_configure(SCLP_CMDW_DECONFIGURE_CPU | cpu << 8);
+}
+
+/*
+ * Channel path configuration related functions.
+ */
+
+#define SCLP_CMDW_CONFIGURE_CHPATH		0x000f0001
+#define SCLP_CMDW_DECONFIGURE_CHPATH		0x000e0001
+#define SCLP_CMDW_READ_CHPATH_INFORMATION	0x00030001
+
+struct chp_cfg_sccb {
+	struct sccb_header header;
+	u8 ccm;
+	u8 reserved[6];
+	u8 cssid;
+} __attribute__((packed));
+
+static int do_chp_configure(sclp_cmdw_t cmd)
+{
+	struct chp_cfg_sccb *sccb;
+	int rc;
+
+	if (!SCLP_HAS_CHP_RECONFIG)
+		return -EOPNOTSUPP;
+	/* Prepare sccb. */
+	sccb = (struct chp_cfg_sccb *) get_zeroed_page(GFP_KERNEL | GFP_DMA);
+	if (!sccb)
+		return -ENOMEM;
+	sccb->header.length = sizeof(*sccb);
+	rc = do_sync_request(cmd, sccb);
+	if (rc)
+		goto out;
+	switch (sccb->header.response_code) {
+	case 0x0020:
+	case 0x0120:
+	case 0x0440:
+	case 0x0450:
+		break;
+	default:
+		printk(KERN_WARNING TAG "configure channel-path failed "
+		       "(cmd=0x%08x, response=0x%04x)\n", cmd,
+		       sccb->header.response_code);
+		rc = -EIO;
+		break;
+	}
+out:
+	free_page((unsigned long) sccb);
+	return rc;
+}
+
+/**
+ * sclp_chp_configure - perform configure channel-path sclp command
+ * @chpid: channel-path ID
+ *
+ * Perform configure channel-path command sclp command for specified chpid.
+ * Return 0 after command successfully finished, non-zero otherwise.
+ */
+int sclp_chp_configure(struct chp_id chpid)
+{
+	return do_chp_configure(SCLP_CMDW_CONFIGURE_CHPATH | chpid.id << 8);
+}
+
+/**
+ * sclp_chp_deconfigure - perform deconfigure channel-path sclp command
+ * @chpid: channel-path ID
+ *
+ * Perform deconfigure channel-path command sclp command for specified chpid
+ * and wait for completion. On success return 0. Return non-zero otherwise.
+ */
+int sclp_chp_deconfigure(struct chp_id chpid)
+{
+	return do_chp_configure(SCLP_CMDW_DECONFIGURE_CHPATH | chpid.id << 8);
+}
+
+struct chp_info_sccb {
+	struct sccb_header header;
+	u8 recognized[SCLP_CHP_INFO_MASK_SIZE];
+	u8 standby[SCLP_CHP_INFO_MASK_SIZE];
+	u8 configured[SCLP_CHP_INFO_MASK_SIZE];
+	u8 ccm;
+	u8 reserved[6];
+	u8 cssid;
+} __attribute__((packed));
+
+/**
+ * sclp_chp_read_info - perform read channel-path information sclp command
+ * @info: resulting channel-path information data
+ *
+ * Perform read channel-path information sclp command and wait for completion.
+ * On success, store channel-path information in @info and return 0. Return
+ * non-zero otherwise.
+ */
+int sclp_chp_read_info(struct sclp_chp_info *info)
+{
+	struct chp_info_sccb *sccb;
+	int rc;
+
+	if (!SCLP_HAS_CHP_INFO)
+		return -EOPNOTSUPP;
+	/* Prepare sccb. */
+	sccb = (struct chp_info_sccb *) get_zeroed_page(GFP_KERNEL | GFP_DMA);
+	if (!sccb)
+		return -ENOMEM;
+	sccb->header.length = sizeof(*sccb);
+	rc = do_sync_request(SCLP_CMDW_READ_CHPATH_INFORMATION, sccb);
+	if (rc)
+		goto out;
+	if (sccb->header.response_code != 0x0010) {
+		printk(KERN_WARNING TAG "read channel-path info failed "
+		       "(response=0x%04x)\n", sccb->header.response_code);
+		rc = -EIO;
+		goto out;
+	}
+	memcpy(info->recognized, sccb->recognized, SCLP_CHP_INFO_MASK_SIZE);
+	memcpy(info->standby, sccb->standby, SCLP_CHP_INFO_MASK_SIZE);
+	memcpy(info->configured, sccb->configured, SCLP_CHP_INFO_MASK_SIZE);
+out:
+	free_page((unsigned long) sccb);
+	return rc;
+}
diff --git a/drivers/s390/char/sclp_config.c b/drivers/s390/char/sclp_config.c
index 5322e5e54a9..9dc77f14fa5 100644
--- a/drivers/s390/char/sclp_config.c
+++ b/drivers/s390/char/sclp_config.c
@@ -29,12 +29,12 @@ static void sclp_cpu_capability_notify(struct work_struct *work)
 	struct sys_device *sysdev;
 
 	printk(KERN_WARNING TAG "cpu capability changed.\n");
-	lock_cpu_hotplug();
+	get_online_cpus();
 	for_each_online_cpu(cpu) {
 		sysdev = get_cpu_sysdev(cpu);
 		kobject_uevent(&sysdev->kobj, KOBJ_CHANGE);
 	}
-	unlock_cpu_hotplug();
+	put_online_cpus();
 }
 
 static void sclp_conf_receiver_fn(struct evbuf_header *evbuf)
diff --git a/drivers/s390/char/sclp_cpi.c b/drivers/s390/char/sclp_cpi.c
index 82a13d9fdfe..5716487b8c9 100644
--- a/drivers/s390/char/sclp_cpi.c
+++ b/drivers/s390/char/sclp_cpi.c
@@ -1,255 +1,41 @@
 /*
- * Author: Martin Peschke <mpeschke@de.ibm.com>
- * Copyright (C) 2001 IBM Entwicklung GmbH, IBM Corporation
+ *  drivers/s390/char/sclp_cpi.c
+ *    SCLP control programm identification
  *
- * SCLP Control-Program Identification.
+ *    Copyright IBM Corp. 2001, 2007
+ *    Author(s): Martin Peschke <mpeschke@de.ibm.com>
+ *		 Michael Ernst <mernst@de.ibm.com>
  */
 
-#include <linux/version.h>
 #include <linux/kmod.h>
 #include <linux/module.h>
 #include <linux/moduleparam.h>
-#include <linux/init.h>
-#include <linux/timer.h>
-#include <linux/string.h>
-#include <linux/err.h>
-#include <linux/slab.h>
-#include <asm/ebcdic.h>
-#include <asm/semaphore.h>
-
-#include "sclp.h"
-#include "sclp_rw.h"
-
-#define CPI_LENGTH_SYSTEM_TYPE	8
-#define CPI_LENGTH_SYSTEM_NAME	8
-#define CPI_LENGTH_SYSPLEX_NAME	8
-
-struct cpi_evbuf {
-	struct evbuf_header header;
-	u8	id_format;
-	u8	reserved0;
-	u8	system_type[CPI_LENGTH_SYSTEM_TYPE];
-	u64	reserved1;
-	u8	system_name[CPI_LENGTH_SYSTEM_NAME];
-	u64	reserved2;
-	u64	system_level;
-	u64	reserved3;
-	u8	sysplex_name[CPI_LENGTH_SYSPLEX_NAME];
-	u8	reserved4[16];
-} __attribute__((packed));
-
-struct cpi_sccb {
-	struct sccb_header header;
-	struct cpi_evbuf cpi_evbuf;
-} __attribute__((packed));
-
-/* Event type structure for write message and write priority message */
-static struct sclp_register sclp_cpi_event =
-{
-	.send_mask = EVTYP_CTLPROGIDENT_MASK
-};
+#include <linux/version.h>
+#include "sclp_cpi_sys.h"
 
 MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Identify this operating system instance "
+		   "to the System z hardware");
+MODULE_AUTHOR("Martin Peschke <mpeschke@de.ibm.com>, "
+	      "Michael Ernst <mernst@de.ibm.com>");
 
-MODULE_AUTHOR(
-	"Martin Peschke, IBM Deutschland Entwicklung GmbH "
-	"<mpeschke@de.ibm.com>");
-
-MODULE_DESCRIPTION(
-	"identify this operating system instance to the S/390 "
-	"or zSeries hardware");
+static char *system_name = "";
+static char *sysplex_name = "";
 
-static char *system_name = NULL;
 module_param(system_name, charp, 0);
 MODULE_PARM_DESC(system_name, "e.g. hostname - max. 8 characters");
-
-static char *sysplex_name = NULL;
-#ifdef ALLOW_SYSPLEX_NAME
 module_param(sysplex_name, charp, 0);
 MODULE_PARM_DESC(sysplex_name, "if applicable - max. 8 characters");
-#endif
-
-/* use default value for this field (as well as for system level) */
-static char *system_type = "LINUX";
 
-static int
-cpi_check_parms(void)
+static int __init cpi_module_init(void)
 {
-	/* reject if no system type specified */
-	if (!system_type) {
-		printk("cpi: bug: no system type specified\n");
-		return -EINVAL;
-	}
-
-	/* reject if system type larger than 8 characters */
-	if (strlen(system_type) > CPI_LENGTH_SYSTEM_NAME) {
-		printk("cpi: bug: system type has length of %li characters - "
-		       "only %i characters supported\n",
-		       strlen(system_type), CPI_LENGTH_SYSTEM_TYPE);
-		return -EINVAL;
-	}
-
-	/* reject if no system name specified */
-	if (!system_name) {
-		printk("cpi: no system name specified\n");
-		return -EINVAL;
-	}
-
-	/* reject if system name larger than 8 characters */
-	if (strlen(system_name) > CPI_LENGTH_SYSTEM_NAME) {
-		printk("cpi: system name has length of %li characters - "
-		       "only %i characters supported\n",
-		       strlen(system_name), CPI_LENGTH_SYSTEM_NAME);
-		return -EINVAL;
-	}
-
-	/* reject if specified sysplex name larger than 8 characters */
-	if (sysplex_name && strlen(sysplex_name) > CPI_LENGTH_SYSPLEX_NAME) {
-		printk("cpi: sysplex name has length of %li characters"
-		       " - only %i characters supported\n",
-		       strlen(sysplex_name), CPI_LENGTH_SYSPLEX_NAME);
-		return -EINVAL;
-	}
-	return 0;
+	return sclp_cpi_set_data(system_name, sysplex_name, "LINUX",
+				 LINUX_VERSION_CODE);
 }
 
-static void
-cpi_callback(struct sclp_req *req, void *data)
-{
-	struct semaphore *sem;
-
-	sem = (struct semaphore *) data;
-	up(sem);
-}
-
-static struct sclp_req *
-cpi_prepare_req(void)
-{
-	struct sclp_req *req;
-	struct cpi_sccb *sccb;
-	struct cpi_evbuf *evb;
-
-	req = kmalloc(sizeof(struct sclp_req), GFP_KERNEL);
-	if (req == NULL)
-		return ERR_PTR(-ENOMEM);
-	sccb = (struct cpi_sccb *) __get_free_page(GFP_KERNEL | GFP_DMA);
-	if (sccb == NULL) {
-		kfree(req);
-		return ERR_PTR(-ENOMEM);
-	}
-	memset(sccb, 0, sizeof(struct cpi_sccb));
-
-	/* setup SCCB for Control-Program Identification */
-	sccb->header.length = sizeof(struct cpi_sccb);
-	sccb->cpi_evbuf.header.length = sizeof(struct cpi_evbuf);
-	sccb->cpi_evbuf.header.type = 0x0B;
-	evb = &sccb->cpi_evbuf;
-
-	/* set system type */
-	memset(evb->system_type, ' ', CPI_LENGTH_SYSTEM_TYPE);
-	memcpy(evb->system_type, system_type, strlen(system_type));
-	sclp_ascebc_str(evb->system_type, CPI_LENGTH_SYSTEM_TYPE);
-	EBC_TOUPPER(evb->system_type, CPI_LENGTH_SYSTEM_TYPE);
-
-	/* set system name */
-	memset(evb->system_name, ' ', CPI_LENGTH_SYSTEM_NAME);
-	memcpy(evb->system_name, system_name, strlen(system_name));
-	sclp_ascebc_str(evb->system_name, CPI_LENGTH_SYSTEM_NAME);
-	EBC_TOUPPER(evb->system_name, CPI_LENGTH_SYSTEM_NAME);
-
-	/* set system level */
-	evb->system_level = LINUX_VERSION_CODE;
-
-	/* set sysplex name */
-	if (sysplex_name) {
-		memset(evb->sysplex_name, ' ', CPI_LENGTH_SYSPLEX_NAME);
-		memcpy(evb->sysplex_name, sysplex_name, strlen(sysplex_name));
-		sclp_ascebc_str(evb->sysplex_name, CPI_LENGTH_SYSPLEX_NAME);
-		EBC_TOUPPER(evb->sysplex_name, CPI_LENGTH_SYSPLEX_NAME);
-	}
-
-	/* prepare request data structure presented to SCLP driver */
-	req->command = SCLP_CMDW_WRITE_EVENT_DATA;
-	req->sccb = sccb;
-	req->status = SCLP_REQ_FILLED;
-	req->callback = cpi_callback;
-	return req;
-}
-
-static void
-cpi_free_req(struct sclp_req *req)
-{
-	free_page((unsigned long) req->sccb);
-	kfree(req);
-}
-
-static int __init
-cpi_module_init(void)
-{
-	struct semaphore sem;
-	struct sclp_req *req;
-	int rc;
-
-	rc = cpi_check_parms();
-	if (rc)
-		return rc;
-
-	rc = sclp_register(&sclp_cpi_event);
-	if (rc) {
-		/* could not register sclp event. Die. */
-		printk(KERN_WARNING "cpi: could not register to hardware "
-		       "console.\n");
-		return -EINVAL;
-	}
-	if (!(sclp_cpi_event.sclp_send_mask & EVTYP_CTLPROGIDENT_MASK)) {
-		printk(KERN_WARNING "cpi: no control program identification "
-		       "support\n");
-		sclp_unregister(&sclp_cpi_event);
-		return -EOPNOTSUPP;
-	}
-
-	req = cpi_prepare_req();
-	if (IS_ERR(req)) {
-		printk(KERN_WARNING "cpi: couldn't allocate request\n");
-		sclp_unregister(&sclp_cpi_event);
-		return PTR_ERR(req);
-	}
-
-	/* Prepare semaphore */
-	sema_init(&sem, 0);
-	req->callback_data = &sem;
-	/* Add request to sclp queue */
-	rc = sclp_add_request(req);
-	if (rc) {
-		printk(KERN_WARNING "cpi: could not start request\n");
-		cpi_free_req(req);
-		sclp_unregister(&sclp_cpi_event);
-		return rc;
-	}
-	/* make "insmod" sleep until callback arrives */
-	down(&sem);
-
-	rc = ((struct cpi_sccb *) req->sccb)->header.response_code;
-	if (rc != 0x0020) {
-		printk(KERN_WARNING "cpi: failed with response code 0x%x\n",
-		       rc);
-		rc = -ECOMM;
-	} else
-		rc = 0;
-
-	cpi_free_req(req);
-	sclp_unregister(&sclp_cpi_event);
-
-	return rc;
-}
-
-
 static void __exit cpi_module_exit(void)
 {
 }
 
-
-/* declare driver module init/cleanup functions */
 module_init(cpi_module_init);
 module_exit(cpi_module_exit);
-
diff --git a/drivers/s390/char/sclp_cpi_sys.c b/drivers/s390/char/sclp_cpi_sys.c
new file mode 100644
index 00000000000..41617032afd
--- /dev/null
+++ b/drivers/s390/char/sclp_cpi_sys.c
@@ -0,0 +1,400 @@
+/*
+ *  drivers/s390/char/sclp_cpi_sys.c
+ *    SCLP control program identification sysfs interface
+ *
+ *    Copyright IBM Corp. 2001, 2007
+ *    Author(s): Martin Peschke <mpeschke@de.ibm.com>
+ *		 Michael Ernst <mernst@de.ibm.com>
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/stat.h>
+#include <linux/device.h>
+#include <linux/string.h>
+#include <linux/ctype.h>
+#include <linux/kmod.h>
+#include <linux/timer.h>
+#include <linux/err.h>
+#include <linux/slab.h>
+#include <linux/completion.h>
+#include <asm/ebcdic.h>
+#include <asm/sclp.h>
+#include "sclp.h"
+#include "sclp_rw.h"
+#include "sclp_cpi_sys.h"
+
+#define CPI_LENGTH_NAME 8
+#define CPI_LENGTH_LEVEL 16
+
+struct cpi_evbuf {
+	struct evbuf_header header;
+	u8	id_format;
+	u8	reserved0;
+	u8	system_type[CPI_LENGTH_NAME];
+	u64	reserved1;
+	u8	system_name[CPI_LENGTH_NAME];
+	u64	reserved2;
+	u64	system_level;
+	u64	reserved3;
+	u8	sysplex_name[CPI_LENGTH_NAME];
+	u8	reserved4[16];
+} __attribute__((packed));
+
+struct cpi_sccb {
+	struct sccb_header header;
+	struct cpi_evbuf cpi_evbuf;
+} __attribute__((packed));<