7 files changed, 317 insertions, 545 deletions

diff --git a/drivers/acpi/Makefile b/drivers/acpi/Makefile
index c07f44f05f9d..1567028d2038 100644
--- a/drivers/acpi/Makefile
+++ b/drivers/acpi/Makefile
@@ -19,7 +19,6 @@ obj-y				+= acpi.o \
 
 # All the builtin files are in the "acpi." module_param namespace.
 acpi-y				+= osl.o utils.o reboot.o
-acpi-y				+= atomicio.o
 acpi-y				+= nvs.o
 
 # sleep related files
diff --git a/drivers/acpi/apei/apei-base.c b/drivers/acpi/apei/apei-base.c
index e45350cb6ac8..e5d53b7ddc7e 100644
--- a/drivers/acpi/apei/apei-base.c
+++ b/drivers/acpi/apei/apei-base.c
@@ -596,33 +596,19 @@ int apei_read(u64 *val, struct acpi_generic_address *reg)
 {
 	int rc;
 	u64 address;
-	u32 tmp, width = reg->bit_width;
 	acpi_status status;
 
 	rc = apei_check_gar(reg, &address);
 	if (rc)
 		return rc;
 
-	if (width == 64)
-		width = 32;	/* Break into two 32-bit transfers */
-
 	*val = 0;
 	switch(reg->space_id) {
 	case ACPI_ADR_SPACE_SYSTEM_MEMORY:
-		status = acpi_os_read_memory((acpi_physical_address)
-					     address, &tmp, width);
+		status = acpi_os_read_memory64((acpi_physical_address)
+					     address, val, reg->bit_width);
 		if (ACPI_FAILURE(status))
 			return -EIO;
-		*val = tmp;
-
-		if (reg->bit_width == 64) {
-			/* Read the top 32 bits */
-			status = acpi_os_read_memory((acpi_physical_address)
-						     (address + 4), &tmp, 32);
-			if (ACPI_FAILURE(status))
-				return -EIO;
-			*val |= ((u64)tmp << 32);
-		}
 		break;
 	case ACPI_ADR_SPACE_SYSTEM_IO:
 		status = acpi_os_read_port(address, (u32 *)val, reg->bit_width);
@@ -642,31 +628,18 @@ int apei_write(u64 val, struct acpi_generic_address *reg)
 {
 	int rc;
 	u64 address;
-	u32 width = reg->bit_width;
 	acpi_status status;
 
 	rc = apei_check_gar(reg, &address);
 	if (rc)
 		return rc;
 
-	if (width == 64)
-		width = 32;	/* Break into two 32-bit transfers */
-
 	switch (reg->space_id) {
 	case ACPI_ADR_SPACE_SYSTEM_MEMORY:
-		status = acpi_os_write_memory((acpi_physical_address)
-					      address, ACPI_LODWORD(val),
-					      width);
+		status = acpi_os_write_memory64((acpi_physical_address)
+					      address, val, reg->bit_width);
 		if (ACPI_FAILURE(status))
 			return -EIO;
-
-		if (reg->bit_width == 64) {
-			status = acpi_os_write_memory((acpi_physical_address)
-						      (address + 4),
-						      ACPI_HIDWORD(val), 32);
-			if (ACPI_FAILURE(status))
-				return -EIO;
-		}
 		break;
 	case ACPI_ADR_SPACE_SYSTEM_IO:
 		status = acpi_os_write_port(address, val, reg->bit_width);
diff --git a/drivers/acpi/apei/einj.c b/drivers/acpi/apei/einj.c
index 5b898d4dda99..4ca087dd5f4f 100644
--- a/drivers/acpi/apei/einj.c
+++ b/drivers/acpi/apei/einj.c
@@ -141,21 +141,6 @@ static DEFINE_MUTEX(einj_mutex);
 
 static void *einj_param;
 
-#ifndef readq
-static inline __u64 readq(volatile void __iomem *addr)
-{
-	return ((__u64)readl(addr+4) << 32) + readl(addr);
-}
-#endif
-
-#ifndef writeq
-static inline void writeq(__u64 val, volatile void __iomem *addr)
-{
-	writel(val, addr);
-	writel(val >> 32, addr+4);
-}
-#endif
-
 static void einj_exec_ctx_init(struct apei_exec_context *ctx)
 {
 	apei_exec_ctx_init(ctx, einj_ins_type, ARRAY_SIZE(einj_ins_type),
@@ -204,22 +189,21 @@ static int einj_timedout(u64 *t)
 static void check_vendor_extension(u64 paddr,
 				   struct set_error_type_with_address *v5param)
 {
-	int	offset = readl(&v5param->vendor_extension);
+	int	offset = v5param->vendor_extension;
 	struct	vendor_error_type_extension *v;
 	u32	sbdf;
 
 	if (!offset)
 		return;
-	v = ioremap(paddr + offset, sizeof(*v));
+	v = acpi_os_map_memory(paddr + offset, sizeof(*v));
 	if (!v)
 		return;
-	sbdf = readl(&v->pcie_sbdf);
+	sbdf = v->pcie_sbdf;
 	sprintf(vendor_dev, "%x:%x:%x.%x vendor_id=%x device_id=%x rev_id=%x\n",
 		sbdf >> 24, (sbdf >> 16) & 0xff,
 		(sbdf >> 11) & 0x1f, (sbdf >> 8) & 0x7,
-		 readw(&v->vendor_id), readw(&v->device_id),
-		readb(&v->rev_id));
-	iounmap(v);
+		 v->vendor_id, v->device_id, v->rev_id);
+	acpi_os_unmap_memory(v, sizeof(*v));
 }
 
 static void *einj_get_parameter_address(void)
@@ -247,7 +231,7 @@ static void *einj_get_parameter_address(void)
 	if (paddrv5) {
 		struct set_error_type_with_address *v5param;
 
-		v5param = ioremap(paddrv5, sizeof(*v5param));
+		v5param = acpi_os_map_memory(paddrv5, sizeof(*v5param));
 		if (v5param) {
 			acpi5 = 1;
 			check_vendor_extension(paddrv5, v5param);
@@ -257,17 +241,17 @@ static void *einj_get_parameter_address(void)
 	if (paddrv4) {
 		struct einj_parameter *v4param;
 
-		v4param = ioremap(paddrv4, sizeof(*v4param));
+		v4param = acpi_os_map_memory(paddrv4, sizeof(*v4param));
 		if (!v4param)
-			return 0;
-		if (readq(&v4param->reserved1) || readq(&v4param->reserved2)) {
-			iounmap(v4param);
-			return 0;
+			return NULL;
+		if (v4param->reserved1 || v4param->reserved2) {
+			acpi_os_unmap_memory(v4param, sizeof(*v4param));
+			return NULL;
 		}
 		return v4param;
 	}
 
-	return 0;
+	return NULL;
 }
 
 /* do sanity check to trigger table */
@@ -276,7 +260,7 @@ static int einj_check_trigger_header(struct acpi_einj_trigger *trigger_tab)
 	if (trigger_tab->header_size != sizeof(struct acpi_einj_trigger))
 		return -EINVAL;
 	if (trigger_tab->table_size > PAGE_SIZE ||
-	    trigger_tab->table_size <= trigger_tab->header_size)
+	    trigger_tab->table_size < trigger_tab->header_size)
 		return -EINVAL;
 	if (trigger_tab->entry_count !=
 	    (trigger_tab->table_size - trigger_tab->header_size) /
@@ -340,6 +324,11 @@ static int __einj_error_trigger(u64 trigger_paddr, u32 type,
 			   "The trigger error action table is invalid\n");
 		goto out_rel_header;
 	}
+
+	/* No action structures in the TRIGGER_ERROR table, nothing to do */
+	if (!trigger_tab->entry_count)
+		goto out_rel_header;
+
 	rc = -EIO;
 	table_size = trigger_tab->table_size;
 	r = request_mem_region(trigger_paddr + sizeof(*trigger_tab),
@@ -435,41 +424,41 @@ static int __einj_error_inject(u32 type, u64 param1, u64 param2)
 	if (acpi5) {
 		struct set_error_type_with_address *v5param = einj_param;
 
-		writel(type, &v5param->type);
+		v5param->type = type;
 		if (type & 0x80000000) {
 			switch (vendor_flags) {
 			case SETWA_FLAGS_APICID:
-				writel(param1, &v5param->apicid);
+				v5param->apicid = param1;
 				break;
 			case SETWA_FLAGS_MEM:
-				writeq(param1, &v5param->memory_address);
-				writeq(param2, &v5param->memory_address_range);
+				v5param->memory_address = param1;
+				v5param->memory_address_range = param2;
 				break;
 			case SETWA_FLAGS_PCIE_SBDF:
-				writel(param1, &v5param->pcie_sbdf);
+				v5param->pcie_sbdf = param1;
 				break;
 			}
-			writel(vendor_flags, &v5param->flags);
+			v5param->flags = vendor_flags;
 		} else {
 			switch (type) {
 			case ACPI_EINJ_PROCESSOR_CORRECTABLE:
 			case ACPI_EINJ_PROCESSOR_UNCORRECTABLE:
 			case ACPI_EINJ_PROCESSOR_FATAL:
-				writel(param1, &v5param->apicid);
-				writel(SETWA_FLAGS_APICID, &v5param->flags);
+				v5param->apicid = param1;
+				v5param->flags = SETWA_FLAGS_APICID;
 				break;
 			case ACPI_EINJ_MEMORY_CORRECTABLE:
 			case ACPI_EINJ_MEMORY_UNCORRECTABLE:
 			case ACPI_EINJ_MEMORY_FATAL:
-				writeq(param1, &v5param->memory_address);
-				writeq(param2, &v5param->memory_address_range);
-				writel(SETWA_FLAGS_MEM, &v5param->flags);
+				v5param->memory_address = param1;
+				v5param->memory_address_range = param2;
+				v5param->flags = SETWA_FLAGS_MEM;
 				break;
 			case ACPI_EINJ_PCIX_CORRECTABLE:
 			case ACPI_EINJ_PCIX_UNCORRECTABLE:
 			case ACPI_EINJ_PCIX_FATAL:
-				writel(param1, &v5param->pcie_sbdf);
-				writel(SETWA_FLAGS_PCIE_SBDF, &v5param->flags);
+				v5param->pcie_sbdf = param1;
+				v5param->flags = SETWA_FLAGS_PCIE_SBDF;
 				break;
 			}
 		}
@@ -479,8 +468,8 @@ static int __einj_error_inject(u32 type, u64 param1, u64 param2)
 			return rc;
 		if (einj_param) {
 			struct einj_parameter *v4param = einj_param;
-			writeq(param1, &v4param->param1);
-			writeq(param2, &v4param->param2);
+			v4param->param1 = param1;
+			v4param->param2 = param2;
 		}
 	}
 	rc = apei_exec_run(&ctx, ACPI_EINJ_EXECUTE_OPERATION);
@@ -731,8 +720,13 @@ static int __init einj_init(void)
 	return 0;
 
 err_unmap:
-	if (einj_param)
-		iounmap(einj_param);
+	if (einj_param) {
+		acpi_size size = (acpi5) ?
+			sizeof(struct set_error_type_with_address) :
+			sizeof(struct einj_parameter);
+
+		acpi_os_unmap_memory(einj_param, size);
+	}
 	apei_exec_post_unmap_gars(&ctx);
 err_release:
 	apei_resources_release(&einj_resources);
@@ -748,8 +742,13 @@ static void __exit einj_exit(void)
 {
 	struct apei_exec_context ctx;
 
-	if (einj_param)
-		iounmap(einj_param);
+	if (einj_param) {
+		acpi_size size = (acpi5) ?
+			sizeof(struct set_error_type_with_address) :
+			sizeof(struct einj_parameter);
+
+		acpi_os_unmap_memory(einj_param, size);
+	}
 	einj_exec_ctx_init(&ctx);
 	apei_exec_post_unmap_gars(&ctx);
 	apei_resources_release(&einj_resources);
diff --git a/drivers/acpi/atomicio.c b/drivers/acpi/atomicio.c
deleted file mode 100644
index d4a5b3d3657b..000000000000
--- a/drivers/acpi/atomicio.c
+++ /dev/null
@@ -1,422 +0,0 @@
-/*
- * atomicio.c - ACPI IO memory pre-mapping/post-unmapping, then
- * accessing in atomic context.
- *
- * This is used for NMI handler to access IO memory area, because
- * ioremap/iounmap can not be used in NMI handler. The IO memory area
- * is pre-mapped in process context and accessed in NMI handler.
- *
- * Copyright (C) 2009-2010, Intel Corp.
- *	Author: Huang Ying <ying.huang@intel.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 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
- */
-
-#include <linux/kernel.h>
-#include <linux/export.h>
-#include <linux/init.h>
-#include <linux/acpi.h>
-#include <linux/io.h>
-#include <linux/kref.h>
-#include <linux/rculist.h>
-#include <linux/interrupt.h>
-#include <linux/slab.h>
-#include <linux/mm.h>
-#include <linux/highmem.h>
-#include <acpi/atomicio.h>
-
-#define ACPI_PFX "ACPI: "
-
-static LIST_HEAD(acpi_iomaps);
-/*
- * Used for mutual exclusion between writers of acpi_iomaps list, for
- * synchronization between readers and writer, RCU is used.
- */
-static DEFINE_SPINLOCK(acpi_iomaps_lock);
-
-struct acpi_iomap {
-	struct list_head list;
-	void __iomem *vaddr;
-	unsigned long size;
-	phys_addr_t paddr;
-	struct kref ref;
-};
-
-/* acpi_iomaps_lock or RCU read lock must be held before calling */
-static struct acpi_iomap *__acpi_find_iomap(phys_addr_t paddr,
-					    unsigned long size)
-{
-	struct acpi_iomap *map;
-
-	list_for_each_entry_rcu(map, &acpi_iomaps, list) {
-		if (map->paddr + map->size >= paddr + size &&
-		    map->paddr <= paddr)
-			return map;
-	}
-	return NULL;
-}
-
-/*
- * Atomic "ioremap" used by NMI handler, if the specified IO memory
- * area is not pre-mapped, NULL will be returned.
- *
- * acpi_iomaps_lock or RCU read lock must be held before calling
- */
-static void __iomem *__acpi_ioremap_fast(phys_addr_t paddr,
-					 unsigned long size)
-{
-	struct acpi_iomap *map;
-
-	map = __acpi_find_iomap(paddr, size/8);
-	if (map)
-		return map->vaddr + (paddr - map->paddr);
-	else
-		return NULL;
-}
-
-/* acpi_iomaps_lock must be held before calling */
-static void __iomem *__acpi_try_ioremap(phys_addr_t paddr,
-					unsigned long size)
-{
-	struct acpi_iomap *map;
-
-	map = __acpi_find_iomap(paddr, size);
-	if (map) {
-		kref_get(&map->ref);
-		return map->vaddr + (paddr - map->paddr);
-	} else
-		return NULL;
-}
-
-#ifndef CONFIG_IA64
-#define should_use_kmap(pfn)	page_is_ram(pfn)
-#else
-/* ioremap will take care of cache attributes */
-#define should_use_kmap(pfn)	0
-#endif
-
-static void __iomem *acpi_map(phys_addr_t pg_off, unsigned long pg_sz)
-{
-	unsigned long pfn;
-
-	pfn = pg_off >> PAGE_SHIFT;
-	if (should_use_kmap(pfn)) {
-		if (pg_sz > PAGE_SIZE)
-			return NULL;
-		return (void __iomem __force *)kmap(pfn_to_page(pfn));
-	} else
-		return ioremap(pg_off, pg_sz);
-}
-
-static void acpi_unmap(phys_addr_t pg_off, void __iomem *vaddr)
-{
-	unsigned long pfn;
-
-	pfn = pg_off >> PAGE_SHIFT;
-	if (page_is_ram(pfn))
-		kunmap(pfn_to_page(pfn));
-	else
-		iounmap(vaddr);
-}
-
-/*
- * Used to pre-map the specified IO memory area. First try to find
- * whether the area is already pre-mapped, if it is, increase the
- * reference count (in __acpi_try_ioremap) and return; otherwise, do
- * the real ioremap, and add the mapping into acpi_iomaps list.
- */
-static void __iomem *acpi_pre_map(phys_addr_t paddr,
-				  unsigned long size)
-{
-	void __iomem *vaddr;
-	struct acpi_iomap *map;
-	unsigned long pg_sz, flags;
-	phys_addr_t pg_off;
-
-	spin_lock_irqsave(&acpi_iomaps_lock, flags);
-	vaddr = __acpi_try_ioremap(paddr, size);
-	spin_unlock_irqrestore(&acpi_iomaps_lock, flags);
-	if (vaddr)
-		return vaddr;
-
-	pg_off = paddr & PAGE_MASK;
-	pg_sz = ((paddr + size + PAGE_SIZE - 1) & PAGE_MASK) - pg_off;
-	vaddr = acpi_map(pg_off, pg_sz);
-	if (!vaddr)
-		return NULL;
-	map = kmalloc(sizeof(*map), GFP_KERNEL);
-	if (!map)
-		goto err_unmap;
-	INIT_LIST_HEAD(&map->list);
-	map->paddr = pg_off;
-	map->size = pg_sz;
-	map->vaddr = vaddr;
-	kref_init(&map->ref);
-
-	spin_lock_irqsave(&acpi_iomaps_lock, flags);
-	vaddr = __acpi_try_ioremap(paddr, size);
-	if (vaddr) {
-		spin_unlock_irqrestore(&acpi_iomaps_lock, flags);
-		acpi_unmap(pg_off, map->vaddr);
-		kfree(map);
-		return vaddr;
-	}
-	list_add_tail_rcu(&map->list, &acpi_iomaps);
-	spin_unlock_irqrestore(&acpi_iomaps_lock, flags);
-
-	return map->vaddr + (paddr - map->paddr);
-err_unmap:
-	acpi_unmap(pg_off, vaddr);
-	return NULL;
-}
-
-/* acpi_iomaps_lock must be held before calling */
-static void __acpi_kref_del_iomap(struct kref *ref)
-{
-	struct acpi_iomap *map;
-
-	map = container_of(ref, struct acpi_iomap, ref);
-	list_del_rcu(&map->list);
-}
-
-/*
- * Used to post-unmap the specified IO memory area. The iounmap is
- * done only if the reference count goes zero.
- */
-static void acpi_post_unmap(phys_addr_t paddr, unsigned long size)
-{
-	struct acpi_iomap *map;
-	unsigned long flags;
-	int del;
-
-	spin_lock_irqsave(&acpi_iomaps_lock, flags);
-	map = __acpi_find_iomap(paddr, size);
-	BUG_ON(!map);
-	del = kref_put(&map->ref, __acpi_kref_del_iomap);
-	spin_unlock_irqrestore(&acpi_iomaps_lock, flags);
-
-	if (!del)
-		return;
-
-	synchronize_rcu();
-	acpi_unmap(map->paddr, map->vaddr);
-	kfree(map);
-}
-
-/* In NMI handler, should set silent = 1 */
-static int acpi_check_gar(struct acpi_generic_address *reg,
-			  u64 *paddr, int silent)
-{
-	u32 width, space_id;
-
-	width = reg->bit_width;
-	space_id = reg->space_id;
-	/* Handle possible alignment issues */
-	memcpy(paddr, &reg->address, sizeof(*paddr));
-	if (!*paddr) {
-		if (!silent)
-			pr_warning(FW_BUG ACPI_PFX
-			"Invalid physical address in GAR [0x%llx/%u/%u]\n",
-				   *paddr, width, space_id);
-		return -EINVAL;
-	}
-
-	if ((width != 8) && (width != 16) && (width != 32) && (width != 64)) {
-		if (!silent)
-			pr_warning(FW_BUG ACPI_PFX
-				   "Invalid bit width in GAR [0x%llx/%u/%u]\n",
-				   *paddr, width, space_id);
-		return -EINVAL;
-	}
-
-	if (space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY &&
-	    space_id != ACPI_ADR_SPACE_SYSTEM_IO) {
-		if (!silent)
-			pr_warning(FW_BUG ACPI_PFX
-			"Invalid address space type in GAR [0x%llx/%u/%u]\n",
-				   *paddr, width, space_id);
-		return -EINVAL;
-	}
-
-	return 0;
-}
-
-/* Pre-map, working on GAR */
-int acpi_pre_map_gar(struct acpi_generic_address *reg)
-{
-	u64 paddr;
-	void __iomem *vaddr;
-	int rc;
-
-	if (reg->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY)
-		return 0;
-
-	rc = acpi_check_gar(reg, &paddr, 0);
-	if (rc)
-		return rc;
-
-	vaddr = acpi_pre_map(paddr, reg->bit_width / 8);
-	if (!vaddr)
-		return -EIO;
-
-	return 0;
-}
-EXPORT_SYMBOL_GPL(acpi_pre_map_gar);
-
-/* Post-unmap, working on GAR */
-int acpi_post_unmap_gar(struct acpi_generic_address *reg)
-{
-	u64 paddr;
-	int rc;
-
-	if (reg->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY)
-		return 0;
-
-	rc = acpi_check_gar(reg, &paddr, 0);
-	if (rc)
-		return rc;
-
-	acpi_post_unmap(paddr, reg->bit_width / 8);
-
-	return 0;
-}
-EXPORT_SYMBOL_GPL(acpi_post_unmap_gar);
-
-#ifdef readq
-static inline u64 read64(const volatile void __iomem *addr)
-{
-	return readq(addr);
-}
-#else
-static inline u64 read64(const volatile void __iomem *addr)
-{
-	u64 l, h;
-	l = readl(addr);
-	h = readl(addr+4);
-	return l | (h << 32);
-}
-#endif
-
-/*
- * Can be used in atomic (including NMI) or process context. RCU read
- * lock can only be released after the IO memory area accessing.
- */
-static int acpi_atomic_read_mem(u64 paddr, u64 *val, u32 width)
-{
-	void __iomem *addr;
-
-	rcu_read_lock();
-	addr = __acpi_ioremap_fast(paddr, width);
-	switch (width) {
-	case 8:
-		*val = readb(addr);
-		break;
-	case 16:
-		*val = readw(addr);
-		break;
-	case 32:
-		*val = readl(addr);
-		break;
-	case 64:
-		*val = read64(addr);
-		break;
-	default:
-		return -EINVAL;
-	}
-	rcu_read_unlock();
-
-	return 0;
-}
-
-#ifdef writeq
-static inline void write64(u64 val, volatile void __iomem *addr)
-{
-	writeq(val, addr);
-}
-#else
-static inline void write64(u64 val, volatile void __iomem *addr)
-{
-	writel(val, addr);
-	writel(val>>32, addr+4);
-}
-#endif
-
-static int acpi_atomic_write_mem(u64 paddr, u64 val, u32 width)
-{
-	void __iomem *addr;
-
-	rcu_read_lock();
-	addr = __acpi_ioremap_fast(paddr, width);
-	switch (width) {
-	case 8:
-		writeb(val, addr);
-		break;
-	case 16:
-		writew(val, addr);
-		break;
-	case 32:
-		writel(val, addr);
-		break;
-	case 64:
-		write64(val, addr);
-		break;
-	default:
-		return -EINVAL;
-	}
-	rcu_read_unlock();
-
-	return 0;
-}
-
-/* GAR accessing in atomic (including NMI) or process context */
-int acpi_atomic_read(u64 *val, struct acpi_generic_address *reg)
-{
-	u64 paddr;
-	int rc;
-
-	rc = acpi_check_gar(reg, &paddr, 1);
-	if (rc)
-		return rc;
-
-	*val = 0;
-	switch (reg->space_id) {
-	case ACPI_ADR_SPACE_SYSTEM_MEMORY:
-		return acpi_atomic_read_mem(paddr, val, reg->bit_width);
-	case ACPI_ADR_SPACE_SYSTEM_IO:
-		return acpi_os_read_port(paddr, (u32 *)val, reg->bit_width);
-	default:
-		return -EINVAL;
-	}
-}
-EXPORT_SYMBOL_GPL(acpi_atomic_read);
-
-int acpi_atomic_write(u64 val, struct acpi_generic_address *reg)
-{
-	u64 paddr;
-	int rc;
-
-	rc = acpi_check_gar(reg, &paddr, 1);
-	if (rc)
-		return rc;
-
-	switch (reg->space_id) {
-	case ACPI_ADR_SPACE_SYSTEM_MEMORY:
-		return acpi_atomic_write_mem(paddr, val, reg->bit_width);
-	case ACPI_ADR_SPACE_SYSTEM_IO:
-		return acpi_os_write_port(paddr, val, reg->bit_width);
-	default:
-		return -EINVAL;
-	}
-}
-EXPORT_SYMBOL_GPL(acpi_atomic_write);
diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c
index fcc12d842bcc..412a1e04a922 100644
--- a/drivers/acpi/osl.c
+++ b/drivers/acpi/osl.c
@@ -31,6 +31,7 @@
 #include <linux/kernel.h>
 #include <linux/slab.h>
 #include <linux/mm.h>
+#include <linux/highmem.h>
 #include <linux/pci.h>
 #include <linux/interrupt.h>
 #include <linux/kmod.h>
@@ -321,6 +322,37 @@ acpi_map_lookup_virt(void __iomem *virt, acpi_size size)
 	return NULL;
 }
 
+#ifndef CONFIG_IA64
+#define should_use_kmap(pfn)   page_is_ram(pfn)
+#else
+/* ioremap will take care of cache attributes */
+#define should_use_kmap(pfn)   0
+#endif
+
+static void __iomem *acpi_map(acpi_physical_address pg_off, unsigned long pg_sz)
+{
+	unsigned long pfn;
+
+	pfn = pg_off >> PAGE_SHIFT;
+	if (should_use_kmap(pfn)) {
+		if (pg_sz > PAGE_SIZE)
+			return NULL;
+		return (void __iomem __force *)kmap(pfn_to_page(pfn));
+	} else
+		return acpi_os_ioremap(pg_off, pg_sz);
+}
+
+static void acpi_unmap(acpi_physical_address pg_off, void __iomem *vaddr)
+{
+	unsigned long pfn;
+
+	pfn = pg_off >> PAGE_SHIFT;
+	if (page_is_ram(pfn))
+		kunmap(pfn_to_page(pfn));
+	else
+		iounmap(vaddr);
+}
+
 void __iomem *__init_refok
 acpi_os_map_memory(acpi_physical_address phys, acpi_size size)
 {
@@ -353,7 +385,7 @@ acpi_os_map_memory(acpi_physical_address phys, acpi_size size)
 
 	pg_off = round_down(phys, PAGE_SIZE);
 	pg_sz = round_up(phys + size, PAGE_SIZE) - pg_off;
-	virt = acpi_os_ioremap(pg_off, pg_sz);
+	virt = acpi_map(pg_off, pg_sz);
 	if (!virt) {
 		mutex_unlock(&acpi_ioremap_lock);
 		kfree(map);
@@ -384,7 +416,7 @@ static void acpi_os_map_cleanup(struct acpi_ioremap *map)
 {
 	if (!map->refcount) {
 		synchronize_rcu();
-		iounmap(map->virt);
+		acpi_unmap(map->phys, map->virt);
 		kfree(map);
 	}
 }
@@ -710,6 +742,67 @@ acpi_os_read_memory(acpi_physical_address phys_addr, u32 * value, u32 width)
 	return AE_OK;
 }
 
+#ifdef readq
+static inline u64 read64(const volatile void __iomem *addr)
+{
+	return readq(addr);
+}
+#else
+static inline u64 read64(const volatile void __iomem *addr)
+{
+	u64 l, h;
+	l = readl(addr);
+	h = readl(addr+4);
+	return l | (h << 32);
+}
+#endif
+
+acpi_status
+acpi_os_read_memory64(acpi_physical_address phys_addr, u64 *value, u32 width)
+{
+	void __iomem *virt_addr;
+	unsigned int size = width / 8;
+	bool unmap = false;
+	u64 dummy;
+
+	rcu_read_lock();
+	virt_addr = acpi_map_vaddr_lookup(phys_addr, size);
+	if (!virt_addr) {
+		rcu_read_unlock();
+		virt_addr = acpi_os_ioremap(phys_addr, size);
+		if (!virt_addr)
+			return AE_BAD_ADDRESS;
+		unmap = true;
+	}
+
+	if (!value)
+		value = &dummy;
+
+	switch (width) {
+	case 8:
+		*(u8 *) value = readb(virt_addr);
+		break;
+	case 16:
+		*(u16 *) value = readw(virt_addr);
+		break;
+	case 32:
+		*(u32 *) value = readl(virt_addr);
+		break;
+	case 64:
+		*(u64 *) value = read64(virt_addr);
+		break;
+	default:
+		BUG();
+	}
+
+	if (unmap)
+		iounmap(virt_addr);
+	else
+		rcu_read_unlock();
+
+	return AE_OK;
+}
+
 acpi_status
 acpi_os_write_memory(acpi_physical_address phys_addr, u32 value, u32 width)
 {
@@ -749,6 +842,61 @@ acpi_os_write_memory(acpi_physical_address phys_addr, u32 value, u32 width)
 	return AE_OK;
 }
 
+#ifdef writeq
+static inline void write64(u64 val, volatile void __iomem *addr)
+{
+	writeq(val, addr);
+}
+#else
+static inline void write64(u64 val, volatile void __iomem *addr)
+{
+	writel(val, addr);
+	writel(val>>32, addr+4);
+}
+#endif
+
+acpi_status
+acpi_os_write_memory64(acpi_physical_address phys_addr, u64 value, u32 width)
+{
+	void __iomem *virt_addr;
+	unsigned int size = width / 8;
+	bool unmap = false;
+
+	rcu_read_lock();
+	virt_addr = acpi_map_vaddr_lookup(phys_addr, size);
+	if (!virt_addr) {
+		rcu_read_unlock();
+		virt_addr = acpi_os_ioremap(phys_addr, size);
+		if (!virt_addr)
+			return AE_BAD_ADDRESS;
+		unmap = true;
+	}
+
+	switch (width) {
+	case 8:
+		writeb(value, virt_addr);
+		break;
+	case 16:
+		writew(value, virt_addr);
+		break;
+	case 32:
+		writel(value, virt_addr);
+		break;
+	case 64:
+		write64(value, virt_addr);
+		break;
+	default:
+		BUG();
+	}
+
+	if (unmap)
+		iounmap(virt_addr);
+	else
+		rcu_read_unlock();
+
+	return AE_OK;
+}
+
 acpi_status
 acpi_os_read_pci_configuration(struct acpi_pci_id * pci_id, u32 reg,
 			       u64 *value, u32 width)
diff --git a/drivers/acpi/processor_driver.c b/drivers/acpi/processor_driver.c
index 0034ede38710..8ae05ce18500 100644
--- a/drivers/acpi/processor_driver.c
+++ b/drivers/acpi/processor_driver.c
@@ -84,7 +84,7 @@ static int acpi_processor_remove(struct acpi_device *device, int type);
 static void acpi_processor_notify(struct acpi_device *device, u32 event);
 static acpi_status acpi_processor_hotadd_init(struct acpi_processor *pr);
 static int acpi_processor_handle_eject(struct acpi_processor *pr);
-
+static int acpi_processor_start(struct acpi_processor *pr);
 
 static const struct acpi_device_id processor_device_ids[] = {
 	{ACPI_PROCESSOR_OBJECT_HID, 0},
@@ -423,10 +423,29 @@ static int acpi_cpu_soft_notify(struct notifier_block *nfb,
 	struct acpi_processor *pr = per_cpu(processors, cpu);
 
 	if (action == CPU_ONLINE && pr) {
-		acpi_processor_ppc_has_changed(pr, 0);
-		acpi_processor_hotplug(pr);
-		acpi_processor_reevaluate_tstate(pr, action);
-		acpi_processor_tstate_has_changed(pr);
+		/* CPU got physically hotplugged and onlined the first time:
+		 * Initialize missing things
+		 */
+		if (pr->flags.need_hotplug_init) {
+			struct cpuidle_driver *idle_driver =
+				cpuidle_get_driver();
+
+			printk(KERN_INFO "Will online and init hotplugged "
+			       "CPU: %d\n", pr->id);
+			WARN(acpi_processor_start(pr), "Failed to start CPU:"
+				" %d\n", pr->id);
+			pr->flags.need_hotplug_init = 0;
+			if (idle_driver && !strcmp(idle_driver->name,
+						   "intel_idle")) {
+				intel_idle_cpu_init(pr->id);
+			}
+		/* Normal CPU soft online event */
+		} else {
+			acpi_processor_ppc_has_changed(pr, 0);
+			acpi_processor_cst_has_changed(pr);
+			acpi_processor_reevaluate_tstate(pr, action);
+			acpi_processor_tstate_has_changed(pr);
+		}
 	}
 	if (action == CPU_DEAD && pr) {
 		/* invalidate the flag.throttling after one CPU is offline */
@@ -440,6 +459,71 @@ static struct notifier_block acpi_cpu_notifier =
 	    .notifier_call = acpi_cpu_soft_notify,
 };
 
+/*
+ * acpi_processor_start() is called by the cpu_hotplug_notifier func:
+ * acpi_cpu_soft_notify(). Getting it __cpuinit{data} is difficult, the
+ * root cause seem to be that acpi_processor_uninstall_hotplug_notify()
+ * is in the module_exit (__exit) func. Allowing acpi_processor_start()
+ * to not be in __cpuinit section, but being called from __cpuinit funcs
+ * via __ref looks like the right thing to do here.
+ */
+static __ref int acpi_processor_start(struct acpi_processor *pr)
+{
+	struct acpi_device *device = per_cpu(processor_device_array, pr->id);
+	int result = 0;
+
+#ifdef CONFIG_CPU_FREQ
+	acpi_processor_ppc_has_changed(pr, 0);
+#endif
+	acpi_processor_get_throttling_info(pr);
+	acpi_processor_get_limit_info(pr);
+
+	if (!cpuidle_get_driver() || cpuidle_get_driver() == &acpi_idle_driver)
+		acpi_processor_power_init(pr, device);
+
+	pr->cdev = thermal_cooling_device_register("Processor", device,
+						   &processor_cooling_ops);
+	if (IS_ERR(pr->cdev)) {
+		result = PTR_ERR(pr->cdev);
+		goto err_power_exit;
+	}
+
+	dev_dbg(&device->dev, "registered as cooling_device%d\n",
+		pr->cdev->id);
+
+	result = sysfs_create_link(&device->dev.kobj,
+				   &pr->cdev->device.kobj,
+				   "thermal_cooling");
+	if (result) {
+		printk(KERN_ERR PREFIX "Create sysfs link\n");
+		goto err_thermal_unregister;
+	}
+	result = sysfs_create_link(&pr->cdev->device.kobj,
+				   &device->dev.kobj,
+				   "device");
+	if (result) {
+		printk(KERN_ERR PREFIX "Create sysfs link\n");
+		goto err_remove_sysfs_thermal;
+	}
+
+	return 0;
+
+err_remove_sysfs_thermal:
+	sysfs_remove_link(&device->dev.kobj, "thermal_cooling");
+err_thermal_unregister:
+	thermal_cooling_device_unregister(pr->cdev);
+err_power_exit:
+	acpi_processor_power_exit(pr, device);
+
+	return result;
+}
+
+/*
+ * Do not put anything in here which needs the core to be online.
+ * For example MSR access or setting up things which check for cpuinfo_x86
+ * (cpu_data(cpu)) values, like CPU feature flags, family, model, etc.
+ * Such things have to be put in and set up above in acpi_processor_start()
+ */
 static int __cpuinit acpi_processor_add(struct acpi_device *device)
 {
 	struct acpi_processor *pr = NULL;
@@ -495,48 +579,20 @@ static int __cpuinit acpi_processor_add(struct acpi_device *device)
 		goto err_free_cpumask;
 	}
 
-#ifdef CONFIG_CPU_FREQ
-	acpi_processor_ppc_has_changed(pr, 0);
-#endif
-	acpi_processor_get_throttling_info(pr);
-	acpi_processor_get_limit_info(pr);
-
-	if (!cpuidle_get_driver() || cpuidle_get_driver() == &acpi_idle_driver)
-		acpi_processor_power_init(pr, device);
-
-	pr->cdev = thermal_cooling_device_register("Processor", device,
-						&processor_cooling_ops);
-	if (IS_ERR(pr->cdev)) {
-		result = PTR_ERR(pr->cdev);
-		goto err_power_exit;
-	}
-
-	dev_dbg(&device->dev, "registered as cooling_device%d\n",
-		 pr->cdev->id);
+	/*
+	 * Do not start hotplugged CPUs now, but when they
+	 * are onlined the first time
+	 */
+	if (pr->flags.need_hotplug_init)
+		return 0;
 
-	result = sysfs_create_link(&device->dev.kobj,
-				   &pr->cdev->device.kobj,
-				   "thermal_cooling");
-	if (result) {
-		printk(KERN_ERR PREFIX "Create sysfs link\n");
-		goto err_thermal_unregister;
-	}
-	result = sysfs_create_link(&pr->cdev->device.kobj,
-				   &device->dev.kobj,
-				   "device");
-	if (result) {
-		printk(KERN_ERR PREFIX "Create sysfs link\n");
+	result = acpi_processor_start(pr);
+	if (result)
 		goto err_remove_sysfs;
-	}
 
 	return 0;
 
 err_remove_sysfs:
-	sysfs_remove_link(&device->dev.kobj, "thermal_cooling");
-err_thermal_unregister:
-	thermal_cooling_device_unregister(pr->cdev);
-err_power_exit:
-	acpi_processor_power_exit(pr, device);
 	sysfs_remove_link(&device->dev.kobj, "sysdev");
 err_free_cpumask:
 	free_cpumask_var(pr->throttling.shared_cpu_map);
@@ -735,6 +791,17 @@ static acpi_status acpi_processor_hotadd_init(struct acpi_processor *pr)
 		return AE_ERROR;
 	}
 
+	/* CPU got hot-plugged, but cpu_data is not initialized yet
+	 * Set flag to delay cpu_idle/throttling initialization
+	 * in:
+	 * acpi_processor_add()
+	 *   acpi_processor_get_info()
+	 * and do it when the CPU gets online the first time
+	 * TBD: Cleanup above functions and try to do this more elegant.
+	 */
+	printk(KERN_INFO "CPU %d got hotplugged\n", pr->id);
+	pr->flags.need_hotplug_init = 1;
+
 	return AE_OK;
 }
 
diff --git a/drivers/acpi/sleep.c b/drivers/acpi/sleep.c
index 0a7ed69546ba..ca191ff97844 100644
--- a/drivers/acpi/sleep.c
+++ b/drivers/acpi/sleep.c
@@ -438,6 +438,14 @@ static struct dmi_system_id __initdata acpisleep_dmi_table[] = {
 	},
 	{
 	.callback = init_nvs_nosave,
+	.ident = "Sony Vaio VPCCW29FX",
+	.matches = {
+		DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
+		DMI_MATCH(DMI_PRODUCT_NAME, "VPCCW29FX"),
+		},
+	},
+	{
+	.callback = init_nvs_nosave,
 	.ident = "Averatec AV1020-ED2",
 	.matches = {
 		DMI_MATCH(DMI_SYS_VENDOR, "AVERATEC"),