[U-Boot] [PATCH v3] efi_loader: Make HII a config option

[Alexander Graf]

Heinrich ran into issues with HII and iPXE which lead to #SErrors on
his Odroid-C2 system. We definitely do not want to regress just yet,
so let's not expose the HII protocols by default.

Instead, let's make it a config option that people can play with
This way, we can stabilize the code in tree without breaking any
users.

Once someone figures out, why this breaks iPXE (probably a NULL
dereference), we can enable it by default.

Reported-by: Heinrich Schuchardt <xypron.glpk at gmx.de>
Signed-off-by: Alexander Graf <agraf at suse.de>

---

v1 -> v2:

  - Remove HII selftest as well

v2 -> v3:

  - Make config option
---
 lib/efi_loader/Kconfig        | 15 +++++++++++++++
 lib/efi_loader/efi_boottime.c |  2 ++
 lib/efi_selftest/Makefile     |  2 +-
 3 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/lib/efi_loader/Kconfig b/lib/efi_loader/Kconfig
index f5de005ff8..23487b8130 100644
--- a/lib/efi_loader/Kconfig
+++ b/lib/efi_loader/Kconfig
@@ -34,3 +34,18 @@ config EFI_LOADER_BOUNCE_BUFFER
 	  Some hardware does not support DMA to full 64bit addresses. For this
 	  hardware we can create a bounce buffer so that payloads don't have to
 	  worry about platform details.
+
+config EFI_LOADER_HII
+	bool "Expose HII protocols to EFI applications"
+	depends on EFI_LOADER
+	default n
+	help
+	  The Human Interface Infrastructure is a complicated framework that
+	  allows UEFI applications to draw fancy menus and hook strings using
+	  a translation framework.
+
+	  U-Boot implements enough of its features to be able to run the UEFI
+	  Shell, but not more than that. The code is experimental still, so
+	  beware that your system might break with HII enabled.
+
+	  If unsure, say n.
diff --git a/lib/efi_loader/efi_boottime.c b/lib/efi_loader/efi_boottime.c
index fc26d6adc1..f74f989e0a 100644
--- a/lib/efi_loader/efi_boottime.c
+++ b/lib/efi_loader/efi_boottime.c
@@ -1558,6 +1558,7 @@ efi_status_t efi_setup_loaded_image(struct efi_device_path *device_path,
 	if (ret != EFI_SUCCESS)
 		goto failure;
 
+#if CONFIG_IS_ENABLED(EFI_LOADER_HII)
 	ret = efi_add_protocol(&obj->header,
 			       &efi_guid_hii_string_protocol,
 			       (void *)&efi_hii_string);
@@ -1575,6 +1576,7 @@ efi_status_t efi_setup_loaded_image(struct efi_device_path *device_path,
 			       (void *)&efi_hii_config_routing);
 	if (ret != EFI_SUCCESS)
 		goto failure;
+#endif
 
 	return ret;
 failure:
diff --git a/lib/efi_selftest/Makefile b/lib/efi_selftest/Makefile
index 779f549940..7f4eafb2fe 100644
--- a/lib/efi_selftest/Makefile
+++ b/lib/efi_selftest/Makefile
@@ -25,7 +25,6 @@ efi_selftest_exception.o \
 efi_selftest_exitbootservices.o \
 efi_selftest_fdt.o \
 efi_selftest_gop.o \
-efi_selftest_hii.o \
 efi_selftest_loaded_image.o \
 efi_selftest_manageprotocols.o \
 efi_selftest_memory.o \
@@ -41,6 +40,7 @@ efi_selftest_variables.o \
 efi_selftest_watchdog.o
 
 obj-$(CONFIG_CPU_V7) += efi_selftest_unaligned.o
+obj-$(CONFIG_EFI_LOADER_HII) += efi_selftest_hii.o
 
 ifeq ($(CONFIG_BLK)$(CONFIG_PARTITIONS),yy)
 obj-y += efi_selftest_block_device.o
-- 
2.12.3