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

Pull EFI updates from Ingo Molnar:
 "The main changes are:

   - Add support for enlisting the help of the EFI firmware to create
     memory reservations that persist across kexec.

   - Add page fault handling to the runtime services support code on x86
     so we can more gracefully recover from buggy EFI firmware.

   - Fix command line handling on x86 for the boot path that omits the
     stub's PE/COFF entry point.

   - Other assorted fixes and updates"

* 'efi-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86: boot: Fix EFI stub alignment
  efi/x86: Call efi_parse_options() from efi_main()
  efi/x86: earlyprintk - Add 64bit efi fb address support
  efi/x86: drop task_lock() from efi_switch_mm()
  efi/x86: Handle page faults occurring while running EFI runtime services
  efi: Make efi_rts_work accessible to efi page fault handler
  efi/efi_test: add exporting ResetSystem runtime service
  efi/libstub: arm: support building with clang
  efi: add API to reserve memory persistently across kexec reboot
  efi/arm: libstub: add a root memreserve config table
  efi: honour memory reservations passed via a linux specific config table

1 files changed, 51 insertions, 0 deletions

diff --git a/include/linux/efi.h b/include/linux/efi.h
index 401e4b254e30..845174e113ce 100644
--- a/include/linux/efi.h
+++ b/include/linux/efi.h
@@ -672,6 +672,7 @@ void efi_native_runtime_setup(void);
 #define LINUX_EFI_LOADER_ENTRY_GUID             EFI_GUID(0x4a67b082, 0x0a4c, 0x41cf,  0xb6, 0xc7, 0x44, 0x0b, 0x29, 0xbb, 0x8c, 0x4f)
 #define LINUX_EFI_RANDOM_SEED_TABLE_GUID        EFI_GUID(0x1ce1e5bc, 0x7ceb, 0x42f2,  0x81, 0xe5, 0x8a, 0xad, 0xf1, 0x80, 0xf5, 0x7b)
 #define LINUX_EFI_TPM_EVENT_LOG_GUID            EFI_GUID(0xb7799cb0, 0xeca2, 0x4943,  0x96, 0x67, 0x1f, 0xae, 0x07, 0xb7, 0x47, 0xfa)
+#define LINUX_EFI_MEMRESERVE_TABLE_GUID         EFI_GUID(0x888eb0c6, 0x8ede, 0x4ff5,  0xa8, 0xf0, 0x9a, 0xee, 0x5c, 0xb9, 0x77, 0xc2)
 
 typedef struct {
         efi_guid_t guid;
@@ -957,6 +958,7 @@ extern struct efi {
         unsigned long mem_attr_table;   /* memory attributes table */
         unsigned long rng_seed;         /* UEFI firmware random seed */
         unsigned long tpm_log;          /* TPM2 Event Log table */
+        unsigned long mem_reserve;      /* Linux EFI memreserve table */
         efi_get_time_t *get_time;
         efi_set_time_t *set_time;
         efi_get_wakeup_time_t *get_wakeup_time;
@@ -1041,6 +1043,7 @@ 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 int efi_mem_reserve_persistent(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);
@@ -1659,7 +1662,55 @@ struct linux_efi_tpm_eventlog {
 
 extern int efi_tpm_eventlog_init(void);
 
+/*
+ * efi_runtime_service() function identifiers.
+ * "NONE" is used by efi_recover_from_page_fault() to check if the page
+ * fault happened while executing an efi runtime service.
+ */
+enum efi_rts_ids {
+        NONE,
+        GET_TIME,
+        SET_TIME,
+        GET_WAKEUP_TIME,
+        SET_WAKEUP_TIME,
+        GET_VARIABLE,
+        GET_NEXT_VARIABLE,
+        SET_VARIABLE,
+        QUERY_VARIABLE_INFO,
+        GET_NEXT_HIGH_MONO_COUNT,
+        RESET_SYSTEM,
+        UPDATE_CAPSULE,
+        QUERY_CAPSULE_CAPS,
+};
+
+/*
+ * efi_runtime_work:    Details of EFI Runtime Service work
+ * @arg<1-5>:           EFI Runtime Service function arguments
+ * @status:             Status of executing EFI Runtime Service
+ * @efi_rts_id:         EFI Runtime Service function identifier
+ * @efi_rts_comp:       Struct used for handling completions
+ */
+struct efi_runtime_work {
+        void *arg1;
+        void *arg2;
+        void *arg3;
+        void *arg4;
+        void *arg5;
+        efi_status_t status;
+        struct work_struct work;
+        enum efi_rts_ids efi_rts_id;
+        struct completion efi_rts_comp;
+};
+
+extern struct efi_runtime_work efi_rts_work;
+
 /* Workqueue to queue EFI Runtime Services */
 extern struct workqueue_struct *efi_rts_wq;
 
+struct linux_efi_memreserve {
+        phys_addr_t     next;
+        phys_addr_t     base;
+        phys_addr_t     size;
+};
+
 #endif /* _LINUX_EFI_H */