--- zzzz-none-000/linux-3.10.107/drivers/s390/char/sclp_cmd.c	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/drivers/s390/char/sclp_cmd.c	2021-02-04 17:41:59.000000000 +0000
@@ -25,169 +25,10 @@
 #include <asm/setup.h>
 #include <asm/page.h>
 #include <asm/sclp.h>
+#include <asm/numa.h>
 
 #include "sclp.h"
 
-#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	fac85;			/* 85 */
-	u8	_reserved3[91 - 86];	/* 86-90 */
-	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 init_sccb __initdata early_event_mask_sccb __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 unsigned long long rzm;
-static unsigned long long rnmax;
-
-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_DEFAULT_KEY | PSW_MASK_BASE | PSW_MASK_EA |
-			PSW_MASK_BA | PSW_MASK_EXT | PSW_MASK_WAIT);
-	local_irq_disable();
-out:
-	/* Contents of the sccb might have changed. */
-	barrier();
-	__ctl_clear_bit(0, 9);
-	return rc;
-}
-
-static 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.function_code = 0x80;
-			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;
-	}
-}
-
-static void __init sclp_event_mask_early(void)
-{
-	struct init_sccb *sccb = &early_event_mask_sccb;
-	int rc;
-
-	do {
-		memset(sccb, 0, sizeof(*sccb));
-		sccb->header.length = sizeof(*sccb);
-		sccb->mask_length = sizeof(sccb_mask_t);
-		rc = sclp_cmd_sync_early(SCLP_CMDW_WRITE_EVENT_MASK, sccb);
-	} while (rc == -EBUSY);
-}
-
-void __init sclp_facilities_detect(void)
-{
-	struct read_info_sccb *sccb;
-
-	sclp_read_info_early();
-	if (!early_read_info_sccb_valid)
-		return;
-
-	sccb = &early_read_info_sccb;
-	sclp_facilities = sccb->facilities;
-	sclp_fac84 = sccb->fac84;
-	if (sccb->fac85 & 0x02)
-		S390_lowcore.machine_flags |= MACHINE_FLAG_ESOP;
-	rnmax = sccb->rnmax ? sccb->rnmax : sccb->rnmax2;
-	rzm = sccb->rnsize ? sccb->rnsize : sccb->rnsize2;
-	rzm <<= 20;
-
-	sclp_event_mask_early();
-}
-
-bool __init sclp_has_linemode(void)
-{
-	struct init_sccb *sccb = &early_event_mask_sccb;
-
-	if (sccb->header.response_code != 0x20)
-		return 0;
-	if (sccb->sclp_send_mask & (EVTYP_MSG_MASK | EVTYP_PMSGCMD_MASK))
-		return 1;
-	return 0;
-}
-
-bool __init sclp_has_vt220(void)
-{
-	struct init_sccb *sccb = &early_event_mask_sccb;
-
-	if (sccb->header.response_code != 0x20)
-		return 0;
-	if (sccb->sclp_send_mask & EVTYP_VT220MSG_MASK)
-		return 1;
-	return 0;
-}
-
-unsigned long long sclp_get_rnmax(void)
-{
-	return rnmax;
-}
-
-unsigned long long sclp_get_rzm(void)
-{
-	return rzm;
-}
-
-/*
- * This function will be called after sclp_facilities_detect(), which gets
- * called 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;
@@ -195,7 +36,12 @@
 	complete(completion);
 }
 
-static int do_sync_request(sclp_cmdw_t cmd, void *sccb)
+int sclp_sync_request(sclp_cmdw_t cmd, void *sccb)
+{
+	return sclp_sync_request_timeout(cmd, sccb, 0);
+}
+
+int sclp_sync_request_timeout(sclp_cmdw_t cmd, void *sccb, int timeout)
 {
 	struct completion completion;
 	struct sclp_req *request;
@@ -204,6 +50,8 @@
 	request = kzalloc(sizeof(*request), GFP_KERNEL);
 	if (!request)
 		return -ENOMEM;
+	if (timeout)
+		request->queue_timeout = timeout;
 	request->command = cmd;
 	request->sccb = sccb;
 	request->status = SCLP_REQ_FILLED;
@@ -245,8 +93,8 @@
 	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)
+static void sclp_fill_core_info(struct sclp_core_info *info,
+				struct read_cpu_info_sccb *sccb)
 {
 	char *page = (char *) sccb;
 
@@ -254,12 +102,11 @@
 	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));
+	memcpy(&info->core, page + sccb->offset_configured,
+	       info->combined * sizeof(struct sclp_core_entry));
 }
 
-int sclp_get_cpu_info(struct sclp_cpu_info *info)
+int sclp_get_core_info(struct sclp_core_info *info)
 {
 	int rc;
 	struct read_cpu_info_sccb *sccb;
@@ -270,7 +117,8 @@
 	if (!sccb)
 		return -ENOMEM;
 	sccb->header.length = sizeof(*sccb);
-	rc = do_sync_request(SCLP_CMDW_READ_CPU_INFO, sccb);
+	rc = sclp_sync_request_timeout(SCLP_CMDW_READ_CPU_INFO, sccb,
+				       SCLP_QUEUE_INTERVAL);
 	if (rc)
 		goto out;
 	if (sccb->header.response_code != 0x0010) {
@@ -279,7 +127,7 @@
 		rc = -EIO;
 		goto out;
 	}
-	sclp_fill_cpu_info(info, sccb);
+	sclp_fill_core_info(info, sccb);
 out:
 	free_page((unsigned long) sccb);
 	return rc;
@@ -289,7 +137,7 @@
 	struct sccb_header header;
 } __attribute__((packed, aligned(8)));
 
-static int do_cpu_configure(sclp_cmdw_t cmd)
+static int do_core_configure(sclp_cmdw_t cmd)
 {
 	struct cpu_configure_sccb *sccb;
 	int rc;
@@ -304,7 +152,7 @@
 	if (!sccb)
 		return -ENOMEM;
 	sccb->header.length = sizeof(*sccb);
-	rc = do_sync_request(cmd, sccb);
+	rc = sclp_sync_request_timeout(cmd, sccb, SCLP_QUEUE_INTERVAL);
 	if (rc)
 		goto out;
 	switch (sccb->header.response_code) {
@@ -323,14 +171,14 @@
 	return rc;
 }
 
-int sclp_cpu_configure(u8 cpu)
+int sclp_core_configure(u8 core)
 {
-	return do_cpu_configure(SCLP_CMDW_CONFIGURE_CPU | cpu << 8);
+	return do_core_configure(SCLP_CMDW_CONFIGURE_CPU | core << 8);
 }
 
-int sclp_cpu_deconfigure(u8 cpu)
+int sclp_core_deconfigure(u8 core)
 {
-	return do_cpu_configure(SCLP_CMDW_DECONFIGURE_CPU | cpu << 8);
+	return do_core_configure(SCLP_CMDW_DECONFIGURE_CPU | core << 8);
 }
 
 #ifdef CONFIG_MEMORY_HOTPLUG
@@ -338,7 +186,7 @@
 static DEFINE_MUTEX(sclp_mem_mutex);
 static LIST_HEAD(sclp_mem_list);
 static u8 sclp_max_storage_id;
-static unsigned long sclp_storage_ids[256 / BITS_PER_LONG];
+static DECLARE_BITMAP(sclp_storage_ids, 256);
 static int sclp_mem_state_changed;
 
 struct memory_increment {
@@ -354,14 +202,14 @@
 
 int arch_get_memory_phys_device(unsigned long start_pfn)
 {
-	if (!rzm)
+	if (!sclp.rzm)
 		return 0;
-	return PFN_PHYS(start_pfn) >> ilog2(rzm);
+	return PFN_PHYS(start_pfn) >> ilog2(sclp.rzm);
 }
 
 static unsigned long long rn2addr(u16 rn)
 {
-	return (unsigned long long) (rn - 1) * rzm;
+	return (unsigned long long) (rn - 1) * sclp.rzm;
 }
 
 static int do_assign_storage(sclp_cmdw_t cmd, u16 rn)
@@ -374,7 +222,7 @@
 		return -ENOMEM;
 	sccb->header.length = PAGE_SIZE;
 	sccb->rn = rn;
-	rc = do_sync_request(cmd, sccb);
+	rc = sclp_sync_request_timeout(cmd, sccb, SCLP_QUEUE_INTERVAL);
 	if (rc)
 		goto out;
 	switch (sccb->header.response_code) {
@@ -402,7 +250,7 @@
 	if (rc)
 		return rc;
 	start = rn2addr(rn);
-	storage_key_init_range(start, start + rzm);
+	storage_key_init_range(start, start + sclp.rzm);
 	return 0;
 }
 
@@ -429,7 +277,8 @@
 	if (!sccb)
 		return -ENOMEM;
 	sccb->header.length = PAGE_SIZE;
-	rc = do_sync_request(0x00080001 | id << 8, sccb);
+	rc = sclp_sync_request_timeout(0x00080001 | id << 8, sccb,
+				       SCLP_QUEUE_INTERVAL);
 	if (rc)
 		goto out;
 	switch (sccb->header.response_code) {
@@ -460,16 +309,35 @@
 		istart = rn2addr(incr->rn);
 		if (start + size - 1 < istart)
 			break;
-		if (start > istart + rzm - 1)
+		if (start > istart + sclp.rzm - 1)
 			continue;
 		if (online)
 			rc |= sclp_assign_storage(incr->rn);
 		else
 			sclp_unassign_storage(incr->rn);
+		if (rc == 0)
+			incr->standby = online ? 0 : 1;
 	}
 	return rc ? -EIO : 0;
 }
 
+static bool contains_standby_increment(unsigned long start, unsigned long end)
+{
+	struct memory_increment *incr;
+	unsigned long istart;
+
+	list_for_each_entry(incr, &sclp_mem_list, list) {
+		istart = rn2addr(incr->rn);
+		if (end - 1 < istart)
+			continue;
+		if (start > istart + sclp.rzm - 1)
+			continue;
+		if (incr->standby)
+			return true;
+	}
+	return false;
+}
+
 static int sclp_mem_notifier(struct notifier_block *nb,
 			     unsigned long action, void *data)
 {
@@ -485,8 +353,16 @@
 	for_each_clear_bit(id, sclp_storage_ids, sclp_max_storage_id + 1)
 		sclp_attach_storage(id);
 	switch (action) {
-	case MEM_ONLINE:
 	case MEM_GOING_OFFLINE:
+		/*
+		 * We do not allow to set memory blocks offline that contain
+		 * standby memory. This is done to simplify the "memory online"
+		 * case.
+		 */
+		if (contains_standby_increment(start, start + size))
+			rc = -EPERM;
+		break;
+	case MEM_ONLINE:
 	case MEM_CANCEL_OFFLINE:
 		break;
 	case MEM_GOING_ONLINE:
@@ -512,10 +388,25 @@
 	.notifier_call = sclp_mem_notifier,
 };
 
+static void __init align_to_block_size(unsigned long long *start,
+				       unsigned long long *size,
+				       unsigned long long alignment)
+{
+	unsigned long long start_align, size_align;
+
+	start_align = roundup(*start, alignment);
+	size_align = rounddown(*start + *size, alignment) - start_align;
+
+	pr_info("Standby memory at 0x%llx (%lluM of %lluM usable)\n",
+		*start, size_align >> 20, *size >> 20);
+	*start = start_align;
+	*size = size_align;
+}
+
 static void __init add_memory_merged(u16 rn)
 {
+	unsigned long long start, size, addr, block_size;
 	static u16 first_rn, num;
-	unsigned long long start, size;
 
 	if (rn && first_rn && (first_rn + num == rn)) {
 		num++;
@@ -524,7 +415,7 @@
 	if (!first_rn)
 		goto skip_add;
 	start = rn2addr(first_rn);
-	size = (unsigned long long ) num * rzm;
+	size = (unsigned long long) num * sclp.rzm;
 	if (start >= VMEM_MAX_PHYS)
 		goto skip_add;
 	if (start + size > VMEM_MAX_PHYS)
@@ -533,7 +424,12 @@
 		goto skip_add;
 	if (memory_end_set && (start + size > memory_end))
 		size = memory_end - start;
-	add_memory(0, start, size);
+	block_size = memory_block_size_bytes();
+	align_to_block_size(&start, &size, block_size);
+	if (!size)
+		goto skip_add;
+	for (addr = start; addr < start + size; addr += block_size)
+		add_memory(numa_pfn_to_nid(PFN_DOWN(addr)), addr, block_size);
 skip_add:
 	first_rn = rn;
 	num = 1;
@@ -572,7 +468,7 @@
 	}
 	if (!assigned)
 		new_incr->rn = last_rn + 1;
-	if (new_incr->rn > rnmax) {
+	if (new_incr->rn > sclp.rnmax) {
 		kfree(new_incr);
 		return;
 	}
@@ -615,9 +511,7 @@
 
 	if (OLDMEM_BASE) /* No standby memory in kdump mode */
 		return 0;
-	if (!early_read_info_sccb_valid)
-		return 0;
-	if ((sclp_facilities & 0xe00000000000ULL) != 0xe00000000000ULL)
+	if ((sclp.facilities & 0xe00000000000ULL) != 0xe00000000000ULL)
 		return 0;
 	rc = -ENOMEM;
 	sccb = (void *) __get_free_page(GFP_KERNEL | GFP_DMA);
@@ -627,7 +521,7 @@
 	for (id = 0; id <= sclp_max_storage_id; id++) {
 		memset(sccb, 0, PAGE_SIZE);
 		sccb->header.length = PAGE_SIZE;
-		rc = do_sync_request(0x00040001 | id << 8, sccb);
+		rc = sclp_sync_request(0x00040001 | id << 8, sccb);
 		if (rc)
 			goto out;
 		switch (sccb->header.response_code) {
@@ -659,7 +553,7 @@
 	}
 	if (rc || list_empty(&sclp_mem_list))
 		goto out;
-	for (i = 1; i <= rnmax - assigned; i++)
+	for (i = 1; i <= sclp.rnmax - assigned; i++)
 		insert_increment(0, 1, 0);
 	rc = register_memory_notifier(&sclp_mem_nb);
 	if (rc)
@@ -668,7 +562,7 @@
 	if (rc)
 		goto out;
 	sclp_pdev = platform_device_register_simple("sclp_mem", -1, NULL, 0);
-	rc = IS_ERR(sclp_pdev) ? PTR_ERR(sclp_pdev) : 0;
+	rc = PTR_ERR_OR_ZERO(sclp_pdev);
 	if (rc)
 		goto out_driver;
 	sclp_add_standby_memory();
@@ -714,7 +608,7 @@
 	sccb->header.length = PAGE_SIZE;
 	sccb->atype = SCLP_RECONFIG_PCI_ATPYE;
 	sccb->aid = fid;
-	rc = do_sync_request(cmd, sccb);
+	rc = sclp_sync_request(cmd, sccb);
 	if (rc)
 		goto out;
 	switch (sccb->header.response_code) {
@@ -771,7 +665,7 @@
 	if (!sccb)
 		return -ENOMEM;
 	sccb->header.length = sizeof(*sccb);
-	rc = do_sync_request(cmd, sccb);
+	rc = sclp_sync_request(cmd, sccb);
 	if (rc)
 		goto out;
 	switch (sccb->header.response_code) {
@@ -846,7 +740,7 @@
 	if (!sccb)
 		return -ENOMEM;
 	sccb->header.length = sizeof(*sccb);
-	rc = do_sync_request(SCLP_CMDW_READ_CHPATH_INFORMATION, sccb);
+	rc = sclp_sync_request(SCLP_CMDW_READ_CHPATH_INFORMATION, sccb);
 	if (rc)
 		goto out;
 	if (sccb->header.response_code != 0x0010) {