1 files changed, 300 insertions, 108 deletions

diff --git a/drivers/firmware/efi/efi.c b/drivers/firmware/efi/efi.c
index 4b7ee3fa9224..a9070d00b833 100644
--- a/drivers/firmware/efi/efi.c
+++ b/drivers/firmware/efi/efi.c
@@ -21,6 +21,7 @@
 #include <linux/device.h>
 #include <linux/efi.h>
 #include <linux/of.h>
+#include <linux/initrd.h>
 #include <linux/io.h>
 #include <linux/kexec.h>
 #include <linux/platform_device.h>
@@ -31,6 +32,7 @@
 #include <linux/ucs2_string.h>
 #include <linux/memblock.h>
 #include <linux/security.h>
+#include <linux/notifier.h>
 
 #include <asm/early_ioremap.h>
 
@@ -43,18 +45,28 @@ struct efi __read_mostly efi = {
 	.esrt			= EFI_INVALID_TABLE_ADDR,
 	.tpm_log		= EFI_INVALID_TABLE_ADDR,
 	.tpm_final_log		= EFI_INVALID_TABLE_ADDR,
+	.ovmf_debug_log         = EFI_INVALID_TABLE_ADDR,
 #ifdef CONFIG_LOAD_UEFI_KEYS
 	.mokvar_table		= EFI_INVALID_TABLE_ADDR,
 #endif
+#ifdef CONFIG_EFI_COCO_SECRET
+	.coco_secret		= EFI_INVALID_TABLE_ADDR,
+#endif
+#ifdef CONFIG_UNACCEPTED_MEMORY
+	.unaccepted		= EFI_INVALID_TABLE_ADDR,
+#endif
 };
 EXPORT_SYMBOL(efi);
 
 unsigned long __ro_after_init efi_rng_seed = EFI_INVALID_TABLE_ADDR;
 static unsigned long __initdata mem_reserve = EFI_INVALID_TABLE_ADDR;
 static unsigned long __initdata rt_prop = EFI_INVALID_TABLE_ADDR;
+static unsigned long __initdata initrd = EFI_INVALID_TABLE_ADDR;
+
+extern unsigned long screen_info_table;
 
 struct mm_struct efi_mm = {
-	.mm_rb			= RB_ROOT,
+	.mm_mt			= MTREE_INIT_EXT(mm_mt, MM_MT_FLAGS, efi_mm.mmap_lock),
 	.mm_users		= ATOMIC_INIT(2),
 	.mm_count		= ATOMIC_INIT(1),
 	.write_protect_seq      = SEQCNT_ZERO(efi_mm.write_protect_seq),
@@ -62,11 +74,14 @@ struct mm_struct efi_mm = {
 	.page_table_lock	= __SPIN_LOCK_UNLOCKED(efi_mm.page_table_lock),
 	.mmlist			= LIST_HEAD_INIT(efi_mm.mmlist),
 	.cpu_bitmap		= { [BITS_TO_LONGS(NR_CPUS)] = 0},
+#ifdef CONFIG_SCHED_MM_CID
+	.mm_cid.lock		= __RAW_SPIN_LOCK_UNLOCKED(efi_mm.mm_cid.lock),
+#endif
 };
 
 struct workqueue_struct *efi_rts_wq;
 
-static bool disable_runtime;
+static bool disable_runtime = IS_ENABLED(CONFIG_EFI_DISABLE_RUNTIME);
 static int __init setup_noefi(char *arg)
 {
 	disable_runtime = true;
@@ -97,6 +112,9 @@ static int __init parse_efi_cmdline(char *str)
 	if (parse_option_str(str, "noruntime"))
 		disable_runtime = true;
 
+	if (parse_option_str(str, "runtime"))
+		disable_runtime = false;
+
 	if (parse_option_str(str, "nosoftreserve"))
 		set_bit(EFI_MEM_NO_SOFT_RESERVE, &efi.flags);
 
@@ -134,9 +152,6 @@ static ssize_t systab_show(struct kobject *kobj,
 	if (efi.smbios != EFI_INVALID_TABLE_ADDR)
 		str += sprintf(str, "SMBIOS=0x%lx\n", efi.smbios);
 
-	if (IS_ENABLED(CONFIG_IA64) || IS_ENABLED(CONFIG_X86))
-		str = efi_systab_show_arch(str);
-
 	return str - buf;
 }
 
@@ -174,29 +189,69 @@ static const struct attribute_group efi_subsys_attr_group = {
 	.is_visible = efi_attr_is_visible,
 };
 
+struct blocking_notifier_head efivar_ops_nh;
+EXPORT_SYMBOL_GPL(efivar_ops_nh);
+
 static struct efivars generic_efivars;
 static struct efivar_operations generic_ops;
 
+static bool generic_ops_supported(void)
+{
+	unsigned long name_size;
+	efi_status_t status;
+	efi_char16_t name;
+	efi_guid_t guid;
+
+	name_size = sizeof(name);
+
+	if (!efi.get_next_variable)
+		return false;
+	status = efi.get_next_variable(&name_size, &name, &guid);
+	if (status == EFI_UNSUPPORTED)
+		return false;
+
+	return true;
+}
+
 static int generic_ops_register(void)
 {
+	if (!generic_ops_supported())
+		return 0;
+
 	generic_ops.get_variable = efi.get_variable;
 	generic_ops.get_next_variable = efi.get_next_variable;
 	generic_ops.query_variable_store = efi_query_variable_store;
+	generic_ops.query_variable_info = efi.query_variable_info;
 
 	if (efi_rt_services_supported(EFI_RT_SUPPORTED_SET_VARIABLE)) {
 		generic_ops.set_variable = efi.set_variable;
 		generic_ops.set_variable_nonblocking = efi.set_variable_nonblocking;
 	}
-	return efivars_register(&generic_efivars, &generic_ops, efi_kobj);
+	return efivars_register(&generic_efivars, &generic_ops);
 }
 
 static void generic_ops_unregister(void)
 {
+	if (!generic_ops.get_variable)
+		return;
+
 	efivars_unregister(&generic_efivars);
 }
 
+void efivars_generic_ops_register(void)
+{
+	generic_ops_register();
+}
+EXPORT_SYMBOL_GPL(efivars_generic_ops_register);
+
+void efivars_generic_ops_unregister(void)
+{
+	generic_ops_unregister();
+}
+EXPORT_SYMBOL_GPL(efivars_generic_ops_unregister);
+
 #ifdef CONFIG_EFI_CUSTOM_SSDT_OVERLAYS
-#define EFIVAR_SSDT_NAME_MAX	16
+#define EFIVAR_SSDT_NAME_MAX	16UL
 static char efivar_ssdt[EFIVAR_SSDT_NAME_MAX] __initdata;
 static int __init efivar_ssdt_setup(char *str)
 {
@@ -209,86 +264,84 @@ static int __init efivar_ssdt_setup(char *str)
 		memcpy(efivar_ssdt, str, strlen(str));
 	else
 		pr_warn("efivar_ssdt: name too long: %s\n", str);
-	return 0;
+	return 1;
 }
 __setup("efivar_ssdt=", efivar_ssdt_setup);
 
-static __init int efivar_ssdt_iter(efi_char16_t *name, efi_guid_t vendor,
-				   unsigned long name_size, void *data)
-{
-	struct efivar_entry *entry;
-	struct list_head *list = data;
-	char utf8_name[EFIVAR_SSDT_NAME_MAX];
-	int limit = min_t(unsigned long, EFIVAR_SSDT_NAME_MAX, name_size);
-
-	ucs2_as_utf8(utf8_name, name, limit - 1);
-	if (strncmp(utf8_name, efivar_ssdt, limit) != 0)
-		return 0;
-
-	entry = kmalloc(sizeof(*entry), GFP_KERNEL);
-	if (!entry)
-		return 0;
-
-	memcpy(entry->var.VariableName, name, name_size);
-	memcpy(&entry->var.VendorGuid, &vendor, sizeof(efi_guid_t));
-
-	efivar_entry_add(entry, list);
-
-	return 0;
-}
-
 static __init int efivar_ssdt_load(void)
 {
-	LIST_HEAD(entries);
-	struct efivar_entry *entry, *aux;
-	unsigned long size;
-	void *data;
-	int ret;
+	unsigned long name_size = 256;
+	efi_char16_t *name = NULL;
+	efi_status_t status;
+	efi_guid_t guid;
+	int ret = 0;
 
 	if (!efivar_ssdt[0])
 		return 0;
 
-	ret = efivar_init(efivar_ssdt_iter, &entries, true, &entries);
+	name = kzalloc(name_size, GFP_KERNEL);
+	if (!name)
+		return -ENOMEM;
+
+	for (;;) {
+		char utf8_name[EFIVAR_SSDT_NAME_MAX];
+		unsigned long data_size = 0;
+		void *data;
+		int limit;
+
+		status = efi.get_next_variable(&name_size, name, &guid);
+		if (status == EFI_NOT_FOUND) {
+			break;
+		} else if (status == EFI_BUFFER_TOO_SMALL) {
+			efi_char16_t *name_tmp =
+				krealloc(name, name_size, GFP_KERNEL);
+			if (!name_tmp) {
+				ret = -ENOMEM;
+				goto out;
+			}
+			name = name_tmp;
+			continue;
+		}
 
-	list_for_each_entry_safe(entry, aux, &entries, list) {
-		pr_info("loading SSDT from variable %s-%pUl\n", efivar_ssdt,
-			&entry->var.VendorGuid);
+		limit = min(EFIVAR_SSDT_NAME_MAX, name_size);
+		ucs2_as_utf8(utf8_name, name, limit - 1);
+		if (strncmp(utf8_name, efivar_ssdt, limit) != 0)
+			continue;
 
-		list_del(&entry->list);
+		pr_info("loading SSDT from variable %s-%pUl\n", efivar_ssdt, &guid);
 
-		ret = efivar_entry_size(entry, &size);
-		if (ret) {
-			pr_err("failed to get var size\n");
-			goto free_entry;
+		status = efi.get_variable(name, &guid, NULL, &data_size, NULL);
+		if (status != EFI_BUFFER_TOO_SMALL || !data_size) {
+			ret = -EIO;
+			goto out;
 		}
 
-		data = kmalloc(size, GFP_KERNEL);
+		data = kmalloc(data_size, GFP_KERNEL);
 		if (!data) {
 			ret = -ENOMEM;
-			goto free_entry;
-		}
-
-		ret = efivar_entry_get(entry, NULL, &size, data);
-		if (ret) {
-			pr_err("failed to get var data\n");
-			goto free_data;
+			goto out;
 		}
 
-		ret = acpi_load_table(data, NULL);
-		if (ret) {
-			pr_err("failed to load table: %d\n", ret);
-			goto free_data;
+		status = efi.get_variable(name, &guid, NULL, &data_size, data);
+		if (status == EFI_SUCCESS) {
+			acpi_status acpi_ret = acpi_load_table(data, NULL);
+			if (ACPI_FAILURE(acpi_ret)) {
+				pr_err("efivar_ssdt: failed to load table: %u\n",
+				       acpi_ret);
+			} else {
+				/*
+				 * The @data will be in use by ACPI engine,
+				 * do not free it!
+				 */
+				continue;
+			}
+		} else {
+			pr_err("efivar_ssdt: failed to get var data: 0x%lx\n", status);
 		}
-
-		goto free_entry;
-
-free_data:
 		kfree(data);
-
-free_entry:
-		kfree(entry);
 	}
-
+out:
+	kfree(name);
 	return ret;
 }
 #else
@@ -310,7 +363,7 @@ static void __init efi_debugfs_init(void)
 	int i = 0;
 
 	efi_debugfs = debugfs_create_dir("efi", NULL);
-	if (IS_ERR_OR_NULL(efi_debugfs))
+	if (IS_ERR(efi_debugfs))
 		return;
 
 	for_each_efi_memory_desc(md) {
@@ -385,8 +438,8 @@ static int __init efisubsys_init(void)
 	efi_kobj = kobject_create_and_add("efi", firmware_kobj);
 	if (!efi_kobj) {
 		pr_err("efi: Firmware registration failed.\n");
-		destroy_workqueue(efi_rts_wq);
-		return -ENOMEM;
+		error = -ENOMEM;
+		goto err_destroy_wq;
 	}
 
 	if (efi_rt_services_supported(EFI_RT_SUPPORTED_GET_VARIABLE |
@@ -394,10 +447,14 @@ static int __init efisubsys_init(void)
 		error = generic_ops_register();
 		if (error)
 			goto err_put;
-		efivar_ssdt_load();
+		error = efivar_ssdt_load();
+		if (error)
+			pr_err("efi: failed to load SSDT, error %d.\n", error);
 		platform_device_register_simple("efivars", 0, NULL, 0);
 	}
 
+	BLOCKING_INIT_NOTIFIER_HEAD(&efivar_ops_nh);
+
 	error = sysfs_create_group(efi_kobj, &efi_subsys_attr_group);
 	if (error) {
 		pr_err("efi: Sysfs attribute export failed with error %d.\n",
@@ -405,10 +462,6 @@ static int __init efisubsys_init(void)
 		goto err_unregister;
 	}
 
-	error = efi_runtime_map_init(efi_kobj);
-	if (error)
-		goto err_remove_group;
-
 	/* and the standard mountpoint for efivarfs */
 	error = sysfs_create_mount_point(efi_kobj, "efivars");
 	if (error) {
@@ -419,6 +472,15 @@ static int __init efisubsys_init(void)
 	if (efi_enabled(EFI_DBG) && efi_enabled(EFI_PRESERVE_BS_REGIONS))
 		efi_debugfs_init();
 
+#ifdef CONFIG_EFI_COCO_SECRET
+	if (efi.coco_secret != EFI_INVALID_TABLE_ADDR)
+		platform_device_register_simple("efi_secret", 0, NULL, 0);
+#endif
+
+	if (IS_ENABLED(CONFIG_OVMF_DEBUG_LOG) &&
+	    efi.ovmf_debug_log != EFI_INVALID_TABLE_ADDR)
+		ovmf_log_probe(efi.ovmf_debug_log);
+
 	return 0;
 
 err_remove_group:
@@ -429,19 +491,46 @@ err_unregister:
 		generic_ops_unregister();
 err_put:
 	kobject_put(efi_kobj);
-	destroy_workqueue(efi_rts_wq);
+	efi_kobj = NULL;
+err_destroy_wq:
+	if (efi_rts_wq)
+		destroy_workqueue(efi_rts_wq);
+
 	return error;
 }
 
 subsys_initcall(efisubsys_init);
 
+void __init efi_find_mirror(void)
+{
+	efi_memory_desc_t *md;
+	u64 mirror_size = 0, total_size = 0;
+
+	if (!efi_enabled(EFI_MEMMAP))
+		return;
+
+	for_each_efi_memory_desc(md) {
+		unsigned long long start = md->phys_addr;
+		unsigned long long size = md->num_pages << EFI_PAGE_SHIFT;
+
+		total_size += size;
+		if (md->attribute & EFI_MEMORY_MORE_RELIABLE) {
+			memblock_mark_mirror(start, size);
+			mirror_size += size;
+		}
+	}
+	if (mirror_size)
+		pr_info("Memory: %lldM/%lldM mirrored memory\n",
+			mirror_size>>20, total_size>>20);
+}
+
 /*
  * Find the efi memory descriptor for a given physical address.  Given a
  * physical address, determine if it exists within an EFI Memory Map entry,
  * and if so, populate the supplied memory descriptor with the appropriate
  * data.
  */
-int efi_mem_desc_lookup(u64 phys_addr, efi_memory_desc_t *out_md)
+int __efi_mem_desc_lookup(u64 phys_addr, efi_memory_desc_t *out_md)
 {
 	efi_memory_desc_t *md;
 
@@ -459,6 +548,12 @@ int efi_mem_desc_lookup(u64 phys_addr, efi_memory_desc_t *out_md)
 		u64 size;
 		u64 end;
 
+		/* skip bogus entries (including empty ones) */
+		if ((md->phys_addr & (EFI_PAGE_SIZE - 1)) ||
+		    (md->num_pages <= 0) ||
+		    (md->num_pages > (U64_MAX - md->phys_addr) >> EFI_PAGE_SHIFT))
+			continue;
+
 		size = md->num_pages << EFI_PAGE_SHIFT;
 		end = md->phys_addr + size;
 		if (phys_addr >= md->phys_addr && phys_addr < end) {
@@ -469,6 +564,10 @@ int efi_mem_desc_lookup(u64 phys_addr, efi_memory_desc_t *out_md)
 	return -ENOENT;
 }
 
+extern int efi_mem_desc_lookup(u64 phys_addr, efi_memory_desc_t *out_md)
+	__weak __alias(__efi_mem_desc_lookup);
+EXPORT_SYMBOL_GPL(efi_mem_desc_lookup);
+
 /*
  * Calculate the highest address of an efi memory descriptor.
  */
@@ -495,6 +594,10 @@ void __init __weak efi_arch_mem_reserve(phys_addr_t addr, u64 size) {}
  */
 void __init efi_mem_reserve(phys_addr_t addr, u64 size)
 {
+	/* efi_mem_reserve() does not work under Xen */
+	if (WARN_ON_ONCE(efi_enabled(EFI_PARAVIRT)))
+		return;
+
 	if (!memblock_is_region_reserved(addr, size))
 		memblock_reserve(addr, size);
 
@@ -517,15 +620,29 @@ static const efi_config_table_type_t common_tables[] __initconst = {
 	{EFI_MEMORY_ATTRIBUTES_TABLE_GUID,	&efi_mem_attr_table,	"MEMATTR"	},
 	{LINUX_EFI_RANDOM_SEED_TABLE_GUID,	&efi_rng_seed,		"RNG"		},
 	{LINUX_EFI_TPM_EVENT_LOG_GUID,		&efi.tpm_log,		"TPMEventLog"	},
-	{LINUX_EFI_TPM_FINAL_LOG_GUID,		&efi.tpm_final_log,	"TPMFinalLog"	},
+	{EFI_TCG2_FINAL_EVENTS_TABLE_GUID,	&efi.tpm_final_log,	"TPMFinalLog"	},
+	{EFI_CC_FINAL_EVENTS_TABLE_GUID,	&efi.tpm_final_log,	"CCFinalLog"	},
 	{LINUX_EFI_MEMRESERVE_TABLE_GUID,	&mem_reserve,		"MEMRESERVE"	},
+	{LINUX_EFI_INITRD_MEDIA_GUID,		&initrd,		"INITRD"	},
 	{EFI_RT_PROPERTIES_TABLE_GUID,		&rt_prop,		"RTPROP"	},
+#ifdef CONFIG_OVMF_DEBUG_LOG
+	{OVMF_MEMORY_LOG_TABLE_GUID,		&efi.ovmf_debug_log,	"OvmfDebugLog"	},
+#endif
 #ifdef CONFIG_EFI_RCI2_TABLE
 	{DELLEMC_EFI_RCI2_TABLE_GUID,		&rci2_table_phys			},
 #endif
 #ifdef CONFIG_LOAD_UEFI_KEYS
 	{LINUX_EFI_MOK_VARIABLE_TABLE_GUID,	&efi.mokvar_table,	"MOKvar"	},
 #endif
+#ifdef CONFIG_EFI_COCO_SECRET
+	{LINUX_EFI_COCO_SECRET_AREA_GUID,	&efi.coco_secret,	"CocoSecret"	},
+#endif
+#ifdef CONFIG_UNACCEPTED_MEMORY
+	{LINUX_EFI_UNACCEPTED_MEM_TABLE_GUID,	&efi.unaccepted,	"Unaccepted"	},
+#endif
+#ifdef CONFIG_EFI_GENERIC_STUB
+	{LINUX_EFI_SCREEN_INFO_TABLE_GUID,	&screen_info_table			},
+#endif
 	{},
 };
 
@@ -536,18 +653,53 @@ static __init int match_config_table(const efi_guid_t *guid,
 	int i;
 
 	for (i = 0; efi_guidcmp(table_types[i].guid, NULL_GUID); i++) {
-		if (!efi_guidcmp(*guid, table_types[i].guid)) {
-			*(table_types[i].ptr) = table;
+		if (efi_guidcmp(*guid, table_types[i].guid))
+			continue;
+
+		if (!efi_config_table_is_usable(guid, table)) {
 			if (table_types[i].name[0])
-				pr_cont("%s=0x%lx ",
+				pr_cont("(%s=0x%lx unusable) ",
 					table_types[i].name, table);
 			return 1;
 		}
+
+		*(table_types[i].ptr) = table;
+		if (table_types[i].name[0])
+			pr_cont("%s=0x%lx ", table_types[i].name, table);
+		return 1;
 	}
 
 	return 0;
 }
 
+/**
+ * reserve_unaccepted - Map and reserve unaccepted configuration table
+ * @unaccepted: Pointer to unaccepted memory table
+ *
+ * memblock_add() makes sure that the table is mapped in direct mapping. During
+ * normal boot it happens automatically because the table is allocated from
+ * usable memory. But during crashkernel boot only memory specifically reserved
+ * for crash scenario is mapped. memblock_add() forces the table to be mapped
+ * in crashkernel case.
+ *
+ * Align the range to the nearest page borders. Ranges smaller than page size
+ * are not going to be mapped.
+ *
+ * memblock_reserve() makes sure that future allocations will not touch the
+ * table.
+ */
+
+static __init void reserve_unaccepted(struct efi_unaccepted_memory *unaccepted)
+{
+	phys_addr_t start, size;
+
+	start = PAGE_ALIGN_DOWN(efi.unaccepted);
+	size = PAGE_ALIGN(sizeof(*unaccepted) + unaccepted->size);
+
+	memblock_add(start, size);
+	memblock_reserve(start, size);
+}
+
 int __init efi_config_parse_tables(const efi_config_table_t *config_tables,
 				   int count,
 				   const efi_config_table_type_t *arch_tables)
@@ -590,7 +742,7 @@ int __init efi_config_parse_tables(const efi_config_table_t *config_tables,
 
 		seed = early_memremap(efi_rng_seed, sizeof(*seed));
 		if (seed != NULL) {
-			size = READ_ONCE(seed->size);
+			size = min_t(u32, seed->size, SZ_1K); // sanity check
 			early_memunmap(seed, sizeof(*seed));
 		} else {
 			pr_err("Could not map UEFI random seed!\n");
@@ -599,8 +751,8 @@ int __init efi_config_parse_tables(const efi_config_table_t *config_tables,
 			seed = early_memremap(efi_rng_seed,
 					      sizeof(*seed) + size);
 			if (seed != NULL) {
-				pr_notice("seeding entropy pool\n");
 				add_bootloader_randomness(seed->bits, size);
+				memzero_explicit(seed->bits, size);
 				early_memunmap(seed, sizeof(*seed) + size);
 			} else {
 				pr_err("Could not map UEFI random seed!\n");
@@ -658,27 +810,48 @@ int __init efi_config_parse_tables(const efi_config_table_t *config_tables,
 		}
 	}
 
+	if (IS_ENABLED(CONFIG_BLK_DEV_INITRD) &&
+	    initrd != EFI_INVALID_TABLE_ADDR && phys_initrd_size == 0) {
+		struct linux_efi_initrd *tbl;
+
+		tbl = early_memremap(initrd, sizeof(*tbl));
+		if (tbl) {
+			phys_initrd_start = tbl->base;
+			phys_initrd_size = tbl->size;
+			early_memunmap(tbl, sizeof(*tbl));
+		}
+	}
+
+	if (IS_ENABLED(CONFIG_UNACCEPTED_MEMORY) &&
+	    efi.unaccepted != EFI_INVALID_TABLE_ADDR) {
+		struct efi_unaccepted_memory *unaccepted;
+
+		unaccepted = early_memremap(efi.unaccepted, sizeof(*unaccepted));
+		if (unaccepted) {
+
+			if (unaccepted->version == 1) {
+				reserve_unaccepted(unaccepted);
+			} else {
+				efi.unaccepted = EFI_INVALID_TABLE_ADDR;
+			}
+
+			early_memunmap(unaccepted, sizeof(*unaccepted));
+		}
+	}
+
 	return 0;
 }
 
-int __init efi_systab_check_header(const efi_table_hdr_t *systab_hdr,
-				   int min_major_version)
+int __init efi_systab_check_header(const efi_table_hdr_t *systab_hdr)
 {
 	if (systab_hdr->signature != EFI_SYSTEM_TABLE_SIGNATURE) {
 		pr_err("System table signature incorrect!\n");
 		return -EINVAL;
 	}
 
-	if ((systab_hdr->revision >> 16) < min_major_version)
-		pr_err("Warning: System table version %d.%02d, expected %d.00 or greater!\n",
-		       systab_hdr->revision >> 16,
-		       systab_hdr->revision & 0xffff,
-		       min_major_version);
-
 	return 0;
 }
 
-#ifndef CONFIG_IA64
 static const efi_char16_t *__init map_fw_vendor(unsigned long fw_vendor,
 						size_t size)
 {
@@ -694,10 +867,6 @@ static void __init unmap_fw_vendor(const void *fw_vendor, size_t size)
 {
 	early_memunmap((void *)fw_vendor, size);
 }
-#else
-#define map_fw_vendor(p, s)	__va(p)
-#define unmap_fw_vendor(v, s)
-#endif
 
 void __init efi_systab_report_header(const efi_table_hdr_t *systab_hdr,
 				     unsigned long fw_vendor)
@@ -705,6 +874,7 @@ void __init efi_systab_report_header(const efi_table_hdr_t *systab_hdr,
 	char vendor[100] = "unknown";
 	const efi_char16_t *c16;
 	size_t i;
+	u16 rev;
 
 	c16 = map_fw_vendor(fw_vendor, sizeof(vendor) * sizeof(efi_char16_t));
 	if (c16) {
@@ -715,10 +885,21 @@ void __init efi_systab_report_header(const efi_table_hdr_t *systab_hdr,
 		unmap_fw_vendor(c16, sizeof(vendor) * sizeof(efi_char16_t));
 	}
 
-	pr_info("EFI v%u.%.02u by %s\n",
-		systab_hdr->revision >> 16,
-		systab_hdr->revision & 0xffff,
-		vendor);
+	rev = (u16)systab_hdr->revision;
+	pr_info("EFI v%u.%u", systab_hdr->revision >> 16, rev / 10);
+
+	rev %= 10;
+	if (rev)
+		pr_cont(".%u", rev);
+
+	pr_cont(" by %s\n", vendor);
+
+	if (IS_ENABLED(CONFIG_X86_64) &&
+	    systab_hdr->revision > EFI_1_10_SYSTEM_TABLE_REVISION &&
+	    !strcmp(vendor, "Apple")) {
+		pr_info("Apple Mac detected, using EFI v1.10 runtime services only\n");
+		efi.runtime_version = EFI_1_10_SYSTEM_TABLE_REVISION;
+	}
 }
 
 static __initdata char memory_type_name[][13] = {
@@ -737,6 +918,7 @@ static __initdata char memory_type_name[][13] = {
 	"MMIO Port",
 	"PAL Code",
 	"Persistent",
+	"Unaccepted",
 };
 
 char * __init efi_md_typeattr_format(char *buf, size_t size,
@@ -764,13 +946,15 @@ char * __init efi_md_typeattr_format(char *buf, size_t size,
 		     EFI_MEMORY_WB | EFI_MEMORY_UCE | EFI_MEMORY_RO |
 		     EFI_MEMORY_WP | EFI_MEMORY_RP | EFI_MEMORY_XP |
 		     EFI_MEMORY_NV | EFI_MEMORY_SP | EFI_MEMORY_CPU_CRYPTO |
-		     EFI_MEMORY_RUNTIME | EFI_MEMORY_MORE_RELIABLE))
+		     EFI_MEMORY_MORE_RELIABLE | EFI_MEMORY_HOT_PLUGGABLE |
+		     EFI_MEMORY_RUNTIME))
 		snprintf(pos, size, "|attr=0x%016llx]",
 			 (unsigned long long)attr);
 	else
 		snprintf(pos, size,
-			 "|%3s|%2s|%2s|%2s|%2s|%2s|%2s|%2s|%2s|%3s|%2s|%2s|%2s|%2s]",
+			 "|%3s|%2s|%2s|%2s|%2s|%2s|%2s|%2s|%2s|%2s|%3s|%2s|%2s|%2s|%2s]",
 			 attr & EFI_MEMORY_RUNTIME		? "RUN" : "",
+			 attr & EFI_MEMORY_HOT_PLUGGABLE	? "HP"  : "",
 			 attr & EFI_MEMORY_MORE_RELIABLE	? "MR"  : "",
 			 attr & EFI_MEMORY_CPU_CRYPTO   	? "CC"  : "",
 			 attr & EFI_MEMORY_SP			? "SP"  : "",
@@ -788,11 +972,6 @@ char * __init efi_md_typeattr_format(char *buf, size_t size,
 }
 
 /*
- * IA64 has a funky EFI memory map that doesn't work the same way as
- * other architectures.
- */
-#ifndef CONFIG_IA64
-/*
  * efi_mem_attributes - lookup memmap attributes for physical address
  * @phys_addr: the physical address to lookup
  *
@@ -839,7 +1018,6 @@ int efi_mem_type(unsigned long phys_addr)
 	}
 	return -EINVAL;
 }
-#endif
 
 int efi_status_to_err(efi_status_t status)
 {
@@ -876,6 +1054,7 @@ int efi_status_to_err(efi_status_t status)
 
 	return err;
 }
+EXPORT_SYMBOL_GPL(efi_status_to_err);
 
 static DEFINE_SPINLOCK(efi_mem_reserve_persistent_lock);
 static struct linux_efi_memreserve *efi_memreserve_root __ro_after_init;
@@ -896,6 +1075,7 @@ static int __init efi_memreserve_map_root(void)
 static int efi_mem_reserve_iomem(phys_addr_t addr, u64 size)
 {
 	struct resource *res, *parent;
+	int ret;
 
 	res = kzalloc(sizeof(struct resource), GFP_ATOMIC);
 	if (!res)
@@ -908,7 +1088,17 @@ static int efi_mem_reserve_iomem(phys_addr_t addr, u64 size)
 
 	/* we expect a conflict with a 'System RAM' region */
 	parent = request_resource_conflict(&iomem_resource, res);
-	return parent ? request_resource(parent, res) : 0;
+	ret = parent ? request_resource(parent, res) : 0;
+
+	/*
+	 * Given that efi_mem_reserve_iomem() can be called at any
+	 * time, only call memblock_reserve() if the architecture
+	 * keeps the infrastructure around.
+	 */
+	if (IS_ENABLED(CONFIG_ARCH_KEEP_MEMBLOCK) && !ret)
+		memblock_reserve(addr, size);
+
+	return ret;
 }
 
 int __ref efi_mem_reserve_persistent(phys_addr_t addr, u64 size)
@@ -929,6 +1119,8 @@ int __ref efi_mem_reserve_persistent(phys_addr_t addr, u64 size)
 	/* first try to find a slot in an existing linked list entry */
 	for (prsv = efi_memreserve_root->next; prsv; ) {
 		rsv = memremap(prsv, sizeof(*rsv), MEMREMAP_WB);
+		if (!rsv)
+			return -ENOMEM;
 		index = atomic_fetch_add_unless(&rsv->count, 1, rsv->size);
 		if (index < rsv->size) {
 			rsv->entry[index].base = addr;