Merge branch 'efi-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull EFI updates from Ingo Molnar:
 "Main changes in this cycle were:

   - Refactor the EFI memory map code into architecture neutral files
     and allow drivers to permanently reserve EFI boot services regions
     on x86, as well as ARM/arm64. (Matt Fleming)

   - Add ARM support for the EFI ESRT driver. (Ard Biesheuvel)

   - Make the EFI runtime services and efivar API interruptible by
     swapping spinlocks for semaphores. (Sylvain Chouleur)

   - Provide the EFI identity mapping for kexec which allows kexec to
     work on SGI/UV platforms with requiring the "noefi" kernel command
     line parameter. (Alex Thorlton)

   - Add debugfs node to dump EFI page tables on arm64. (Ard Biesheuvel)

   - Merge the EFI test driver being carried out of tree until now in
     the FWTS project. (Ivan Hu)

   - Expand the list of flags for classifying EFI regions as "RAM" on
     arm64 so we align with the UEFI spec. (Ard Biesheuvel)

   - Optimise out the EFI mixed mode if it's unsupported (CONFIG_X86_32)
     or disabled (CONFIG_EFI_MIXED=n) and switch the early EFI boot
     services function table for direct calls, alleviating us from
     having to maintain the custom function table. (Lukas Wunner)

   - Miscellaneous cleanups and fixes"

* 'efi-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (30 commits)
  x86/efi: Round EFI memmap reservations to EFI_PAGE_SIZE
  x86/efi: Allow invocation of arbitrary boot services
  x86/efi: Optimize away setup_gop32/64 if unused
  x86/efi: Use kmalloc_array() in efi_call_phys_prolog()
  efi/arm64: Treat regions with WT/WC set but WB cleared as memory
  efi: Add efi_test driver for exporting UEFI runtime service interfaces
  x86/efi: Defer efi_esrt_init until after memblock_x86_fill
  efi/arm64: Add debugfs node to dump UEFI runtime page tables
  x86/efi: Remove unused find_bits() function
  fs/efivarfs: Fix double kfree() in error path
  x86/efi: Map in physical addresses in efi_map_region_fixed
  lib/ucs2_string: Speed up ucs2_utf8size()
  firmware-gsmi: Delete an unnecessary check before the function call "dma_pool_destroy"
  x86/efi: Initialize status to ensure garbage is not returned on small size
  efi: Replace runtime services spinlock with semaphore
  efi: Don't use spinlocks for efi vars
  efi: Use a file local lock for efivars
  efi/arm*: esrt: Add missing call to efi_esrt_init()
  efi/esrt: Use memremap not ioremap to access ESRT table in memory
  x86/efi-bgrt: Use efi_mem_reserve() to avoid copying image data
  ...

1 files changed, 34 insertions, 13 deletions

diff --git a/include/linux/efi.h b/include/linux/efi.h
index 0148a3046b48..2d089487d2da 100644
--- a/include/linux/efi.h
+++ b/include/linux/efi.h
@@ -20,6 +20,7 @@
 #include <linux/ioport.h>
 #include <linux/pfn.h>
 #include <linux/pstore.h>
+#include <linux/range.h>
 #include <linux/reboot.h>
 #include <linux/uuid.h>
 #include <linux/screen_info.h>
@@ -37,6 +38,7 @@
 #define EFI_WRITE_PROTECTED	( 8 | (1UL << (BITS_PER_LONG-1)))
 #define EFI_OUT_OF_RESOURCES	( 9 | (1UL << (BITS_PER_LONG-1)))
 #define EFI_NOT_FOUND		(14 | (1UL << (BITS_PER_LONG-1)))
+#define EFI_ABORTED		(21 | (1UL << (BITS_PER_LONG-1)))
 #define EFI_SECURITY_VIOLATION	(26 | (1UL << (BITS_PER_LONG-1)))
 
 typedef unsigned long efi_status_t;
@@ -678,6 +680,18 @@ typedef struct {
 	unsigned long tables;
 } efi_system_table_t;
 
+/*
+ * Architecture independent structure for describing a memory map for the
+ * benefit of efi_memmap_init_early(), saving us the need to pass four
+ * parameters.
+ */
+struct efi_memory_map_data {
+	phys_addr_t phys_map;
+	unsigned long size;
+	unsigned long desc_version;
+	unsigned long desc_size;
+};
+
 struct efi_memory_map {
 	phys_addr_t phys_map;
 	void *map;
@@ -685,6 +699,12 @@ struct efi_memory_map {
 	int nr_map;
 	unsigned long desc_version;
 	unsigned long desc_size;
+	bool late;
+};
+
+struct efi_mem_range {
+	struct range range;
+	u64 attribute;
 };
 
 struct efi_fdt_params {
@@ -909,6 +929,16 @@ static inline efi_status_t efi_query_variable_store(u32 attributes,
 }
 #endif
 extern void __iomem *efi_lookup_mapped_addr(u64 phys_addr);
+
+extern int __init efi_memmap_init_early(struct efi_memory_map_data *data);
+extern int __init efi_memmap_init_late(phys_addr_t addr, unsigned long size);
+extern void __init efi_memmap_unmap(void);
+extern int __init efi_memmap_install(phys_addr_t addr, unsigned int nr_map);
+extern int __init efi_memmap_split_count(efi_memory_desc_t *md,
+					 struct range *range);
+extern void __init efi_memmap_insert(struct efi_memory_map *old_memmap,
+				     void *buf, struct efi_mem_range *mem);
+
 extern int efi_config_init(efi_config_table_type_t *arch_tables);
 #ifdef CONFIG_EFI_ESRT
 extern void __init efi_esrt_init(void);
@@ -924,6 +954,7 @@ extern u64 efi_mem_attribute (unsigned long phys_addr, unsigned long size);
 extern int __init efi_uart_console_only (void);
 extern u64 efi_mem_desc_end(efi_memory_desc_t *md);
 extern int efi_mem_desc_lookup(u64 phys_addr, efi_memory_desc_t *out_md);
+extern void efi_mem_reserve(phys_addr_t addr, u64 size);
 extern void efi_initialize_iomem_resources(struct resource *code_resource,
 		struct resource *data_resource, struct resource *bss_resource);
 extern void efi_reserve_boot_services(void);
@@ -1136,12 +1167,6 @@ struct efivar_operations {
 };
 
 struct efivars {
-	/*
-	 * ->lock protects two things:
-	 * 1) efivarfs_list and efivars_sysfs_list
-	 * 2) ->ops calls
-	 */
-	spinlock_t lock;
 	struct kset *kset;
 	struct kobject *kobject;
 	const struct efivar_operations *ops;
@@ -1282,8 +1307,8 @@ struct kobject *efivars_kobject(void);
 int efivar_init(int (*func)(efi_char16_t *, efi_guid_t, unsigned long, void *),
 		void *data, bool duplicates, struct list_head *head);
 
-void efivar_entry_add(struct efivar_entry *entry, struct list_head *head);
-void efivar_entry_remove(struct efivar_entry *entry);
+int efivar_entry_add(struct efivar_entry *entry, struct list_head *head);
+int efivar_entry_remove(struct efivar_entry *entry);
 
 int __efivar_entry_delete(struct efivar_entry *entry);
 int efivar_entry_delete(struct efivar_entry *entry);
@@ -1300,7 +1325,7 @@ int efivar_entry_set_get_size(struct efivar_entry *entry, u32 attributes,
 int efivar_entry_set_safe(efi_char16_t *name, efi_guid_t vendor, u32 attributes,
 			  bool block, unsigned long size, void *data);
 
-void efivar_entry_iter_begin(void);
+int efivar_entry_iter_begin(void);
 void efivar_entry_iter_end(void);
 
 int __efivar_entry_iter(int (*func)(struct efivar_entry *, void *),
@@ -1336,7 +1361,6 @@ extern int efi_capsule_update(efi_capsule_header_t *capsule,
 
 #ifdef CONFIG_EFI_RUNTIME_MAP
 int efi_runtime_map_init(struct kobject *);
-void efi_runtime_map_setup(void *, int, u32);
 int efi_get_runtime_map_size(void);
 int efi_get_runtime_map_desc_size(void);
 int efi_runtime_map_copy(void *buf, size_t bufsz);
@@ -1346,9 +1370,6 @@ static inline int efi_runtime_map_init(struct kobject *kobj)
 	return 0;
 }
 
-static inline void
-efi_runtime_map_setup(void *map, int nr_entries, u32 desc_size) {}
-
 static inline int efi_get_runtime_map_size(void)
 {
 	return 0;