[PATCH v12] Boot var automatic management for removable medias
Masahisa Kojima
masahisa.kojima at linaro.org
Wed Sep 27 03:04:36 CEST 2023
From: Raymond Mao <raymond.mao at linaro.org>
Changes for complying to EFI spec §3.5.1.1
'Removable Media Boot Behavior'.
Boot variables can be automatically generated during a removable
media is probed. At the same time, unused boot variables will be
detected and removed.
Please note that currently the function 'efi_disk_remove' has no
ability to distinguish below two scenarios
a) Unplugging of a removable media under U-Boot
b) U-Boot exiting and booting an OS
Thus currently the boot variables management is not added into
'efi_disk_remove' to avoid boot options being added/erased
repeatedly under scenario b) during power cycles
See TODO comments under function 'efi_disk_remove' for more details
The original efi_secboot tests expect that BootOrder EFI variable
is not defined. With this commit, the BootOrder EFI variable is
automatically added when the disk is detected. The original efi_secboot
tests end up with unexpected failure.
The efi_secboot tests need to be modified to clear the BootOrder
EFI variable at the beginning of each test.
Co-developed-by: Masahisa Kojima <masahisa.kojima at linaro.org>
Signed-off-by: Masahisa Kojima <masahisa.kojima at linaro.org>
Signed-off-by: Raymond Mao <raymond.mao at linaro.org>
Reviewed-by: Heinrich Schuchardt <xypron.glpk at gmx.de>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas at linaro.org>
---
lib/efi_loader/efi_disk.c | 18 ++++++++++++++++++
lib/efi_loader/efi_setup.c | 7 +++++++
test/py/tests/test_efi_secboot/test_signed.py | 9 +++++++++
.../test_efi_secboot/test_signed_intca.py | 3 +++
.../py/tests/test_efi_secboot/test_unsigned.py | 3 +++
5 files changed, 40 insertions(+)
diff --git a/lib/efi_loader/efi_disk.c b/lib/efi_loader/efi_disk.c
index f0d76113b0..b808a7fe62 100644
--- a/lib/efi_loader/efi_disk.c
+++ b/lib/efi_loader/efi_disk.c
@@ -690,6 +690,13 @@ int efi_disk_probe(void *ctx, struct event *event)
return -1;
}
+ /* only do the boot option management when UEFI sub-system is initialized */
+ if (IS_ENABLED(CONFIG_CMD_BOOTEFI_BOOTMGR) && efi_obj_list_initialized == EFI_SUCCESS) {
+ ret = efi_bootmgr_update_media_device_boot_option();
+ if (ret != EFI_SUCCESS)
+ return -1;
+ }
+
return 0;
}
@@ -742,6 +749,17 @@ int efi_disk_remove(void *ctx, struct event *event)
dev_tag_del(dev, DM_TAG_EFI);
return 0;
+
+ /*
+ * TODO A flag to distinguish below 2 different scenarios of this
+ * function call is needed:
+ * a) Unplugging of a removable media under U-Boot
+ * b) U-Boot exiting and booting an OS
+ * In case of scenario a), efi_bootmgr_update_media_device_boot_option()
+ * needs to be invoked here to update the boot options and remove the
+ * unnecessary ones.
+ */
+
}
/**
diff --git a/lib/efi_loader/efi_setup.c b/lib/efi_loader/efi_setup.c
index 58d4e13402..69c8b27730 100644
--- a/lib/efi_loader/efi_setup.c
+++ b/lib/efi_loader/efi_setup.c
@@ -245,6 +245,13 @@ efi_status_t efi_init_obj_list(void)
if (ret != EFI_SUCCESS)
goto out;
+ if (IS_ENABLED(CONFIG_CMD_BOOTEFI_BOOTMGR)) {
+ /* update boot option after variable service initialized */
+ ret = efi_bootmgr_update_media_device_boot_option();
+ if (ret != EFI_SUCCESS)
+ goto out;
+ }
+
/* Define supported languages */
ret = efi_init_platform_lang();
if (ret != EFI_SUCCESS)
diff --git a/test/py/tests/test_efi_secboot/test_signed.py b/test/py/tests/test_efi_secboot/test_signed.py
index ca52e853d8..b77b60e223 100644
--- a/test/py/tests/test_efi_secboot/test_signed.py
+++ b/test/py/tests/test_efi_secboot/test_signed.py
@@ -28,6 +28,7 @@ class TestEfiSignedImage(object):
# Test Case 1a, run signed image if no PK
output = u_boot_console.run_command_list([
'host bind 0 %s' % disk_img,
+ 'setenv -e -nv -bs -rt BootOrder',
'efidebug boot add -b 1 HELLO1 host 0:1 /helloworld.efi.signed -s ""',
'efidebug boot next 1',
'bootefi bootmgr'])
@@ -52,6 +53,7 @@ class TestEfiSignedImage(object):
# Test Case 2a, db is not yet installed
output = u_boot_console.run_command_list([
'host bind 0 %s' % disk_img,
+ 'setenv -e -nv -bs -rt BootOrder',
'fatload host 0:1 4000000 KEK.auth',
'setenv -e -nv -bs -rt -at -i 4000000:$filesize KEK',
'fatload host 0:1 4000000 PK.auth',
@@ -96,6 +98,7 @@ class TestEfiSignedImage(object):
# Test Case 3a, rejected by dbx
output = u_boot_console.run_command_list([
'host bind 0 %s' % disk_img,
+ 'setenv -e -nv -bs -rt BootOrder',
'fatload host 0:1 4000000 db.auth',
'setenv -e -nv -bs -rt -at -i 4000000:$filesize dbx',
'fatload host 0:1 4000000 KEK.auth',
@@ -132,6 +135,7 @@ class TestEfiSignedImage(object):
# Test Case 4, rejected by dbx
output = u_boot_console.run_command_list([
'host bind 0 %s' % disk_img,
+ 'setenv -e -nv -bs -rt BootOrder',
'fatload host 0:1 4000000 dbx_hash.auth',
'setenv -e -nv -bs -rt -at -i 4000000:$filesize dbx',
'fatload host 0:1 4000000 db.auth',
@@ -161,6 +165,7 @@ class TestEfiSignedImage(object):
# is verified
output = u_boot_console.run_command_list([
'host bind 0 %s' % disk_img,
+ 'setenv -e -nv -bs -rt BootOrder',
'fatload host 0:1 4000000 db.auth',
'setenv -e -nv -bs -rt -at -i 4000000:$filesize db',
'fatload host 0:1 4000000 KEK.auth',
@@ -217,6 +222,7 @@ class TestEfiSignedImage(object):
# is verified. Same as before but reject dbx_hash1.auth only
output = u_boot_console.run_command_list([
'host bind 0 %s' % disk_img,
+ 'setenv -e -nv -bs -rt BootOrder',
'fatload host 0:1 4000000 db.auth',
'setenv -e -nv -bs -rt -at -i 4000000:$filesize db',
'fatload host 0:1 4000000 KEK.auth',
@@ -294,6 +300,7 @@ class TestEfiSignedImage(object):
with u_boot_console.log.section('Test Case 7a'):
output = u_boot_console.run_command_list([
'host bind 0 %s' % disk_img,
+ 'setenv -e -nv -bs -rt BootOrder',
'fatload host 0:1 4000000 db.auth',
'setenv -e -nv -bs -rt -at -i 4000000:$filesize db',
'fatload host 0:1 4000000 KEK.auth',
@@ -317,6 +324,7 @@ class TestEfiSignedImage(object):
with u_boot_console.log.section('Test Case 7b'):
output = u_boot_console.run_command_list([
'host bind 0 %s' % disk_img,
+ 'setenv -e -nv -bs -rt BootOrder',
'fatload host 0:1 4000000 db.auth',
'setenv -e -nv -bs -rt -at -i 4000000:$filesize db',
'fatload host 0:1 4000000 KEK.auth',
@@ -348,6 +356,7 @@ class TestEfiSignedImage(object):
# Test Case 8a, Secure boot is not yet forced
output = u_boot_console.run_command_list([
'host bind 0 %s' % disk_img,
+ 'setenv -e -nv -bs -rt BootOrder',
'efidebug boot add -b 1 HELLO1 host 0:1 /helloworld_forged.efi.signed -s ""',
'efidebug boot next 1',
'efidebug test bootmgr'])
diff --git a/test/py/tests/test_efi_secboot/test_signed_intca.py b/test/py/tests/test_efi_secboot/test_signed_intca.py
index d8d599d22f..318715fa08 100644
--- a/test/py/tests/test_efi_secboot/test_signed_intca.py
+++ b/test/py/tests/test_efi_secboot/test_signed_intca.py
@@ -30,6 +30,7 @@ class TestEfiSignedImageIntca(object):
# Test Case 1a, with no Int CA and not authenticated by root CA
output = u_boot_console.run_command_list([
'host bind 0 %s' % disk_img,
+ 'setenv -e -nv -bs -rt BootOrder',
'fatload host 0:1 4000000 db_c.auth',
'setenv -e -nv -bs -rt -at -i 4000000:$filesize db',
'fatload host 0:1 4000000 KEK.auth',
@@ -63,6 +64,7 @@ class TestEfiSignedImageIntca(object):
# Test Case 2a, unsigned and not authenticated by root CA
output = u_boot_console.run_command_list([
'host bind 0 %s' % disk_img,
+ 'setenv -e -nv -bs -rt BootOrder',
'fatload host 0:1 4000000 KEK.auth',
'setenv -e -nv -bs -rt -at -i 4000000:$filesize KEK',
'fatload host 0:1 4000000 PK.auth',
@@ -105,6 +107,7 @@ class TestEfiSignedImageIntca(object):
# Test Case 3a, revoked by int CA in dbx
output = u_boot_console.run_command_list([
'host bind 0 %s' % disk_img,
+ 'setenv -e -nv -bs -rt BootOrder',
'fatload host 0:1 4000000 dbx_b.auth',
'setenv -e -nv -bs -rt -at -i 4000000:$filesize dbx',
'fatload host 0:1 4000000 db_c.auth',
diff --git a/test/py/tests/test_efi_secboot/test_unsigned.py b/test/py/tests/test_efi_secboot/test_unsigned.py
index df63f0df08..9042a46ccc 100644
--- a/test/py/tests/test_efi_secboot/test_unsigned.py
+++ b/test/py/tests/test_efi_secboot/test_unsigned.py
@@ -28,6 +28,7 @@ class TestEfiUnsignedImage(object):
# Test Case 1
output = u_boot_console.run_command_list([
'host bind 0 %s' % disk_img,
+ 'setenv -e -nv -bs -rt BootOrder',
'fatload host 0:1 4000000 KEK.auth',
'setenv -e -nv -bs -rt -at -i 4000000:$filesize KEK',
'fatload host 0:1 4000000 PK.auth',
@@ -55,6 +56,7 @@ class TestEfiUnsignedImage(object):
# Test Case 2
output = u_boot_console.run_command_list([
'host bind 0 %s' % disk_img,
+ 'setenv -e -nv -bs -rt BootOrder',
'fatload host 0:1 4000000 db_hello.auth',
'setenv -e -nv -bs -rt -at -i 4000000:$filesize db',
'fatload host 0:1 4000000 KEK.auth',
@@ -79,6 +81,7 @@ class TestEfiUnsignedImage(object):
# Test Case 3a, rejected by dbx
output = u_boot_console.run_command_list([
'host bind 0 %s' % disk_img,
+ 'setenv -e -nv -bs -rt BootOrder',
'fatload host 0:1 4000000 db_hello.auth',
'setenv -e -nv -bs -rt -at -i 4000000:$filesize dbx',
'fatload host 0:1 4000000 KEK.auth',
--
2.34.1
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