u-boot.git/include/efi_loader.h, branch v2019.10

efi_loader: device_path: support Sandbox's "host" devices

2019-09-20T18:09:18+00:00

Sandbox's "host" devices are currently described as UCLASS_ROOT udevice
with DEV_IF_HOST block device. As the current implementation of
efi_device_path doesn't support such a type, any "host" device
on sandbox cannot be seen as a distinct object.

For example,
  => host bind 0 /foo/disk.img

  => efi devices
  Scanning disk host0...
  Found 1 disks
  Device           Device Path
  ================ ====================
  0000000015c19970 /VenHw(e61d73b9-a384-4acc-aeab-82e828f3628b)
  0000000015c19d70 /VenHw(e61d73b9-a384-4acc-aeab-82e828f3628b)

  => efi dh
  Handle           Protocols
  ================ ====================
  0000000015c19970 Device Path, Device Path To Text, Device Path Utilities, Unicode Collation 2, HII String, HII Database, HII Config Routing
  0000000015c19ba0 Driver Binding
  0000000015c19c10 Simple Text Output
  0000000015c19c80 Simple Text Input, Simple Text Input Ex
  0000000015c19d70 Block IO, Device Path, Simple File System

As you can see here, efi_root (0x0000000015c19970) and host0 device
(0x0000000015c19d70) have the same representation of device path.

This is not only inconvenient, but also confusing since two different
efi objects are associated with the same device path and
efi_dp_find_obj() will possibly return a wrong result.

Solution:
Each "host" device should be given an additional device path node
of "vendor device path" to make it distinguishable.

Signed-off-by: AKASHI Takahiro 
Reviewed-by: Heinrich Schuchardt 
Signed-off-by: Heinrich Schuchardt

efi_loader: eliminate inline function ascii2unicode()

2019-09-09T13:21:08+00:00

ascii2unicode() can only convert characters 0x00-0x7f from UTF-8 to UTF-16.
Use utf8_utf16_strcpy() instead.

Signed-off-by: Heinrich Schuchardt

efi_loader: Extract adding a conventional memory in separate routine

2019-09-05T21:18:51+00:00

Adding a conventional memory region to the memory map may require ram_top
limitation and it can be also commonly used. Extract adding a conventional
memory to the memory map in a separate routine for generic use.

Signed-off-by: Aiden Park 
Tested-by: Heinrich Schuchardt 
Reviewed-by: Heinrich Schuchardt

efi_loader: avoid alignment error

2019-07-16T22:17:22+00:00

In packed structures GUIDs are not aligned. Avoid a build error with
GCC 9.1 by using const void * as argument for guidcmp().

Reported-by: Ramon Fried 
Signed-off-by: Heinrich Schuchardt

efi_loader: Change return type of efi_add_memory_map()

2019-07-16T22:17:17+00:00

We currently have some inconsistent use of efi_add_memory_map()
throughout the code. In particular the return value of efi_add_memory_map()
is not interpreted the same way by various users in the codebase.

This patch does the following:

- Changes efi_add_memory_map() to return efi_status_t.
- Adds a method description to efi_add_memory_map().
- Changes efi_add_memory_map() to return EFI_SUCCESS
- Returns non-zero for error in efi_add_memory_map()
- Updates efi_allocate_pages() to new efi_add_memory_map()
- Updates efi_free_pages() to new efi_add_memory_map()
- Updates efi_carve_out_dt_rsv() to new efi_add_memory_map()
- Updates efi_add_runtime_mmio()  to new efi_add_memory_map()

Fixes: 5d00995c361c ("efi_loader: Implement memory allocation and map")
Fixes: 74c16acce30b ("efi_loader: Don't allocate from memory holes")
Suggested-by: Heinrich Schuchardt 
Cc: Alexander Graf 
Signed-off-by: Bryan O'Donoghue 
Reviewed-by: Heinrich Schuchardt

efi_loader: detach runtime in ExitBootServices()

2019-07-06T19:25:32+00:00

Linux can be called with a command line parameter efi=novamap, cf.
commit 4e46c2a95621 ("efi/arm/arm64: Allow SetVirtualAddressMap() to be
omitted"). In this case SetVirtualAddressMap() is not called after
ExitBootServices().

OpenBSD 32bit does not call SetVirtualAddressMap() either.

Runtime services must be set to an implementation supported at runtime
in ExitBootServices().

Reported-by: Ard Biesheuvel 
Suggested-by: Alexander Graf 
Signed-off-by: Heinrich Schuchardt

efi_loader: let the variable driver patch out the runtime

2019-07-06T19:25:32+00:00

Our variable services are only provided at boottime. Therefore when
leaving boottime the variable function are replaced by dummy functions
returning EFI_UNSUPPORTED. Move this patching of the runtime table to the
variable services implementation. Executed it in ExitBootServices().

Signed-off-by: Heinrich Schuchardt

efi_loader: initialization of variable services

2019-07-06T19:25:32+00:00

Provide an initialization routine for variable services.

Signed-off-by: Heinrich Schuchardt

efi_loader: move efi_query_variable_info()

2019-07-06T19:25:32+00:00

Let's keep similar things together.

Move efi_query_variable_info() to lib/efi_loader/efi_variable.c

Signed-off-by: Heinrich Schuchardt

efi_loader: add RuntimeServicesSupported variable

2019-06-14T17:18:40+00:00

This variable is defined in UEFI specification 2.8, section 8.1.
Its value should be updated whenever we add any usable runtime services
function.

Currently we only support SetVirtualAddress() for all systems and
ResetSystem() for some.

Signed-off-by: AKASHI Takahiro 
Reviewed-by: Heinrich Schuchardt