]> git.proxmox.com Git - mirror_ubuntu-eoan-kernel.git/commitdiff
Merge branch 'x86-efi-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
authorLinus Torvalds <torvalds@linux-foundation.org>
Tue, 5 Aug 2014 00:13:50 +0000 (17:13 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Tue, 5 Aug 2014 00:13:50 +0000 (17:13 -0700)
Pull EFI changes from Ingo Molnar:
 "Main changes in this cycle are:

   - arm64 efi stub fixes, preservation of FP/SIMD registers across
     firmware calls, and conversion of the EFI stub code into a static
     library - Ard Biesheuvel

   - Xen EFI support - Daniel Kiper

   - Support for autoloading the efivars driver - Lee, Chun-Yi

   - Use the PE/COFF headers in the x86 EFI boot stub to request that
     the stub be loaded with CONFIG_PHYSICAL_ALIGN alignment - Michael
     Brown

   - Consolidate all the x86 EFI quirks into one file - Saurabh Tangri

   - Additional error logging in x86 EFI boot stub - Ulf Winkelvos

   - Support loading initrd above 4G in EFI boot stub - Yinghai Lu

   - EFI reboot patches for ACPI hardware reduced platforms"

* 'x86-efi-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (31 commits)
  efi/arm64: Handle missing virtual mapping for UEFI System Table
  arch/x86/xen: Silence compiler warnings
  xen: Silence compiler warnings
  x86/efi: Request desired alignment via the PE/COFF headers
  x86/efi: Add better error logging to EFI boot stub
  efi: Autoload efivars
  efi: Update stale locking comment for struct efivars
  arch/x86: Remove efi_set_rtc_mmss()
  arch/x86: Replace plain strings with constants
  xen: Put EFI machinery in place
  xen: Define EFI related stuff
  arch/x86: Remove redundant set_bit(EFI_MEMMAP) call
  arch/x86: Remove redundant set_bit(EFI_SYSTEM_TABLES) call
  efi: Introduce EFI_PARAVIRT flag
  arch/x86: Do not access EFI memory map if it is not available
  efi: Use early_mem*() instead of early_io*()
  arch/ia64: Define early_memunmap()
  x86/reboot: Add EFI reboot quirk for ACPI Hardware Reduced flag
  efi/reboot: Allow powering off machines using EFI
  efi/reboot: Add generic wrapper around EfiResetSystem()
  ...

1  2 
arch/arm64/Kconfig
arch/arm64/Makefile
arch/arm64/kernel/Makefile
arch/x86/Kconfig
arch/x86/boot/header.S
arch/x86/xen/enlighten.c
arch/x86/xen/xen-ops.h
drivers/firmware/efi/efi.c
drivers/firmware/efi/libstub/fdt.c

Simple merge
Simple merge
Simple merge
Simple merge
Simple merge
Simple merge
Simple merge
Simple merge
index 0000000000000000000000000000000000000000,86d2934840e2c1a4766afdf782a696d6ab2e60f7..a56bb3528755377b8fd6cb29dbd5fcb85692a55d
mode 000000,100644..100644
--- /dev/null
@@@ -1,0 -1,279 +1,279 @@@
 -              const char *type, *name;
+ /*
+  * FDT related Helper functions used by the EFI stub on multiple
+  * architectures. This should be #included by the EFI stub
+  * implementation files.
+  *
+  * Copyright 2013 Linaro Limited; author Roy Franz
+  *
+  * This file is part of the Linux kernel, and is made available
+  * under the terms of the GNU General Public License version 2.
+  *
+  */
+ #include <linux/efi.h>
+ #include <linux/libfdt.h>
+ #include <asm/efi.h>
+ efi_status_t update_fdt(efi_system_table_t *sys_table, void *orig_fdt,
+                       unsigned long orig_fdt_size,
+                       void *fdt, int new_fdt_size, char *cmdline_ptr,
+                       u64 initrd_addr, u64 initrd_size,
+                       efi_memory_desc_t *memory_map,
+                       unsigned long map_size, unsigned long desc_size,
+                       u32 desc_ver)
+ {
+       int node, prev;
+       int status;
+       u32 fdt_val32;
+       u64 fdt_val64;
+       /* Do some checks on provided FDT, if it exists*/
+       if (orig_fdt) {
+               if (fdt_check_header(orig_fdt)) {
+                       pr_efi_err(sys_table, "Device Tree header not valid!\n");
+                       return EFI_LOAD_ERROR;
+               }
+               /*
+                * We don't get the size of the FDT if we get if from a
+                * configuration table.
+                */
+               if (orig_fdt_size && fdt_totalsize(orig_fdt) > orig_fdt_size) {
+                       pr_efi_err(sys_table, "Truncated device tree! foo!\n");
+                       return EFI_LOAD_ERROR;
+               }
+       }
+       if (orig_fdt)
+               status = fdt_open_into(orig_fdt, fdt, new_fdt_size);
+       else
+               status = fdt_create_empty_tree(fdt, new_fdt_size);
+       if (status != 0)
+               goto fdt_set_fail;
+       /*
+        * Delete any memory nodes present. We must delete nodes which
+        * early_init_dt_scan_memory may try to use.
+        */
+       prev = 0;
+       for (;;) {
++              const char *type;
+               int len;
+               node = fdt_next_node(fdt, prev, NULL);
+               if (node < 0)
+                       break;
+               type = fdt_getprop(fdt, node, "device_type", &len);
+               if (type && strncmp(type, "memory", len) == 0) {
+                       fdt_del_node(fdt, node);
+                       continue;
+               }
+               prev = node;
+       }
+       node = fdt_subnode_offset(fdt, 0, "chosen");
+       if (node < 0) {
+               node = fdt_add_subnode(fdt, 0, "chosen");
+               if (node < 0) {
+                       status = node; /* node is error code when negative */
+                       goto fdt_set_fail;
+               }
+       }
+       if ((cmdline_ptr != NULL) && (strlen(cmdline_ptr) > 0)) {
+               status = fdt_setprop(fdt, node, "bootargs", cmdline_ptr,
+                                    strlen(cmdline_ptr) + 1);
+               if (status)
+                       goto fdt_set_fail;
+       }
+       /* Set initrd address/end in device tree, if present */
+       if (initrd_size != 0) {
+               u64 initrd_image_end;
+               u64 initrd_image_start = cpu_to_fdt64(initrd_addr);
+               status = fdt_setprop(fdt, node, "linux,initrd-start",
+                                    &initrd_image_start, sizeof(u64));
+               if (status)
+                       goto fdt_set_fail;
+               initrd_image_end = cpu_to_fdt64(initrd_addr + initrd_size);
+               status = fdt_setprop(fdt, node, "linux,initrd-end",
+                                    &initrd_image_end, sizeof(u64));
+               if (status)
+                       goto fdt_set_fail;
+       }
+       /* Add FDT entries for EFI runtime services in chosen node. */
+       node = fdt_subnode_offset(fdt, 0, "chosen");
+       fdt_val64 = cpu_to_fdt64((u64)(unsigned long)sys_table);
+       status = fdt_setprop(fdt, node, "linux,uefi-system-table",
+                            &fdt_val64, sizeof(fdt_val64));
+       if (status)
+               goto fdt_set_fail;
+       fdt_val64 = cpu_to_fdt64((u64)(unsigned long)memory_map);
+       status = fdt_setprop(fdt, node, "linux,uefi-mmap-start",
+                            &fdt_val64,  sizeof(fdt_val64));
+       if (status)
+               goto fdt_set_fail;
+       fdt_val32 = cpu_to_fdt32(map_size);
+       status = fdt_setprop(fdt, node, "linux,uefi-mmap-size",
+                            &fdt_val32,  sizeof(fdt_val32));
+       if (status)
+               goto fdt_set_fail;
+       fdt_val32 = cpu_to_fdt32(desc_size);
+       status = fdt_setprop(fdt, node, "linux,uefi-mmap-desc-size",
+                            &fdt_val32, sizeof(fdt_val32));
+       if (status)
+               goto fdt_set_fail;
+       fdt_val32 = cpu_to_fdt32(desc_ver);
+       status = fdt_setprop(fdt, node, "linux,uefi-mmap-desc-ver",
+                            &fdt_val32, sizeof(fdt_val32));
+       if (status)
+               goto fdt_set_fail;
+       /*
+        * Add kernel version banner so stub/kernel match can be
+        * verified.
+        */
+       status = fdt_setprop_string(fdt, node, "linux,uefi-stub-kern-ver",
+                            linux_banner);
+       if (status)
+               goto fdt_set_fail;
+       return EFI_SUCCESS;
+ fdt_set_fail:
+       if (status == -FDT_ERR_NOSPACE)
+               return EFI_BUFFER_TOO_SMALL;
+       return EFI_LOAD_ERROR;
+ }
+ #ifndef EFI_FDT_ALIGN
+ #define EFI_FDT_ALIGN EFI_PAGE_SIZE
+ #endif
+ /*
+  * Allocate memory for a new FDT, then add EFI, commandline, and
+  * initrd related fields to the FDT.  This routine increases the
+  * FDT allocation size until the allocated memory is large
+  * enough.  EFI allocations are in EFI_PAGE_SIZE granules,
+  * which are fixed at 4K bytes, so in most cases the first
+  * allocation should succeed.
+  * EFI boot services are exited at the end of this function.
+  * There must be no allocations between the get_memory_map()
+  * call and the exit_boot_services() call, so the exiting of
+  * boot services is very tightly tied to the creation of the FDT
+  * with the final memory map in it.
+  */
+ efi_status_t allocate_new_fdt_and_exit_boot(efi_system_table_t *sys_table,
+                                           void *handle,
+                                           unsigned long *new_fdt_addr,
+                                           unsigned long max_addr,
+                                           u64 initrd_addr, u64 initrd_size,
+                                           char *cmdline_ptr,
+                                           unsigned long fdt_addr,
+                                           unsigned long fdt_size)
+ {
+       unsigned long map_size, desc_size;
+       u32 desc_ver;
+       unsigned long mmap_key;
+       efi_memory_desc_t *memory_map;
+       unsigned long new_fdt_size;
+       efi_status_t status;
+       /*
+        * Estimate size of new FDT, and allocate memory for it. We
+        * will allocate a bigger buffer if this ends up being too
+        * small, so a rough guess is OK here.
+        */
+       new_fdt_size = fdt_size + EFI_PAGE_SIZE;
+       while (1) {
+               status = efi_high_alloc(sys_table, new_fdt_size, EFI_FDT_ALIGN,
+                                       new_fdt_addr, max_addr);
+               if (status != EFI_SUCCESS) {
+                       pr_efi_err(sys_table, "Unable to allocate memory for new device tree.\n");
+                       goto fail;
+               }
+               /*
+                * Now that we have done our final memory allocation (and free)
+                * we can get the memory map key  needed for
+                * exit_boot_services().
+                */
+               status = efi_get_memory_map(sys_table, &memory_map, &map_size,
+                                           &desc_size, &desc_ver, &mmap_key);
+               if (status != EFI_SUCCESS)
+                       goto fail_free_new_fdt;
+               status = update_fdt(sys_table,
+                                   (void *)fdt_addr, fdt_size,
+                                   (void *)*new_fdt_addr, new_fdt_size,
+                                   cmdline_ptr, initrd_addr, initrd_size,
+                                   memory_map, map_size, desc_size, desc_ver);
+               /* Succeeding the first time is the expected case. */
+               if (status == EFI_SUCCESS)
+                       break;
+               if (status == EFI_BUFFER_TOO_SMALL) {
+                       /*
+                        * We need to allocate more space for the new
+                        * device tree, so free existing buffer that is
+                        * too small.  Also free memory map, as we will need
+                        * to get new one that reflects the free/alloc we do
+                        * on the device tree buffer.
+                        */
+                       efi_free(sys_table, new_fdt_size, *new_fdt_addr);
+                       sys_table->boottime->free_pool(memory_map);
+                       new_fdt_size += EFI_PAGE_SIZE;
+               } else {
+                       pr_efi_err(sys_table, "Unable to constuct new device tree.\n");
+                       goto fail_free_mmap;
+               }
+       }
+       /* Now we are ready to exit_boot_services.*/
+       status = sys_table->boottime->exit_boot_services(handle, mmap_key);
+       if (status == EFI_SUCCESS)
+               return status;
+       pr_efi_err(sys_table, "Exit boot services failed.\n");
+ fail_free_mmap:
+       sys_table->boottime->free_pool(memory_map);
+ fail_free_new_fdt:
+       efi_free(sys_table, new_fdt_size, *new_fdt_addr);
+ fail:
+       return EFI_LOAD_ERROR;
+ }
+ void *get_fdt(efi_system_table_t *sys_table)
+ {
+       efi_guid_t fdt_guid = DEVICE_TREE_GUID;
+       efi_config_table_t *tables;
+       void *fdt;
+       int i;
+       tables = (efi_config_table_t *) sys_table->tables;
+       fdt = NULL;
+       for (i = 0; i < sys_table->nr_tables; i++)
+               if (efi_guidcmp(tables[i].guid, fdt_guid) == 0) {
+                       fdt = (void *) tables[i].table;
+                       break;
+        }
+       return fdt;
+ }