From 2662b54d70fc04f070f0e4a9742d4b3197c9f3ea Mon Sep 17 00:00:00 2001
From: Simon Glass <sjg@chromium.org>
Date: Sat, 30 Jul 2022 15:52:22 -0600
Subject: [PATCH] bootstd: Allow EFI bootmgr to support an invalid bootflow

For most testing we don't want this bootmeth to actually do anything. For
the one test where we do, add a test hook to obtain the correct behaviour.
This will allow us to bind the device always, rather than just doing it
for this test.

Signed-off-by: Simon Glass <sjg@chromium.org>
---
 arch/sandbox/include/asm/test.h | 11 +++++++++++
 boot/bootmeth_efi_mgr.c         | 32 ++++++++++++++++++++++++++------
 test/boot/bootflow.c            |  4 ++++
 3 files changed, 41 insertions(+), 6 deletions(-)

diff --git a/arch/sandbox/include/asm/test.h b/arch/sandbox/include/asm/test.h
index 015e96d53f..53a036b3ab 100644
--- a/arch/sandbox/include/asm/test.h
+++ b/arch/sandbox/include/asm/test.h
@@ -304,4 +304,15 @@ int sandbox_cros_ec_get_pwm_duty(struct udevice *dev, uint index, uint *duty);
  */
 int sandbox_sdl_set_bpp(struct udevice *dev, enum video_log2_bpp l2bpp);
 
+/**
+ * sandbox_set_fake_efi_mgr_dev() - Control EFI bootmgr producing valid bootflow
+ *
+ * This is only used for testing.
+ *
+ * @dev: efi_mgr bootmeth device
+ * @fake_dev: true to produce a valid bootflow when requested, false to produce
+ * an error
+ */
+void sandbox_set_fake_efi_mgr_dev(struct udevice *dev, bool fake_dev);
+
 #endif
diff --git a/boot/bootmeth_efi_mgr.c b/boot/bootmeth_efi_mgr.c
index 08d9328af4..2f327c1f8c 100644
--- a/boot/bootmeth_efi_mgr.c
+++ b/boot/bootmeth_efi_mgr.c
@@ -15,6 +15,22 @@
 #include <command.h>
 #include <dm.h>
 
+/**
+ * struct efi_mgr_priv - private info for the efi-mgr driver
+ *
+ * @fake_bootflow: Fake a valid bootflow for testing
+ */
+struct efi_mgr_priv {
+	bool fake_dev;
+};
+
+void sandbox_set_fake_efi_mgr_dev(struct udevice *dev, bool fake_dev)
+{
+	struct efi_mgr_priv *priv = dev_get_priv(dev);
+
+	priv->fake_dev = fake_dev;
+}
+
 static int efi_mgr_check(struct udevice *dev, struct bootflow_iter *iter)
 {
 	int ret;
@@ -29,13 +45,16 @@ static int efi_mgr_check(struct udevice *dev, struct bootflow_iter *iter)
 
 static int efi_mgr_read_bootflow(struct udevice *dev, struct bootflow *bflow)
 {
-	/*
-	 * Just assume there is something to boot since we don't have any way
-	 * of knowing in advance
-	 */
-	bflow->state = BOOTFLOWST_READY;
+	struct efi_mgr_priv *priv = dev_get_priv(dev);
 
-	return 0;
+	if (priv->fake_dev) {
+		bflow->state = BOOTFLOWST_READY;
+		return 0;
+	}
+
+	/* To be implemented */
+
+	return -EINVAL;
 }
 
 static int efi_mgr_read_file(struct udevice *dev, struct bootflow *bflow,
@@ -84,4 +103,5 @@ U_BOOT_DRIVER(bootmeth_efi_mgr) = {
 	.of_match	= efi_mgr_bootmeth_ids,
 	.ops		= &efi_mgr_bootmeth_ops,
 	.bind		= bootmeth_efi_mgr_bind,
+	.priv_auto	= sizeof(struct efi_mgr_priv),
 };
diff --git a/test/boot/bootflow.c b/test/boot/bootflow.c
index a2ed8ac774..22eef40c0e 100644
--- a/test/boot/bootflow.c
+++ b/test/boot/bootflow.c
@@ -11,6 +11,8 @@
 #include <bootflow.h>
 #include <bootstd.h>
 #include <dm.h>
+#include <asm/test.h>
+#include <dm/device-internal.h>
 #include <dm/lists.h>
 #include <test/suites.h>
 #include <test/ut.h>
@@ -328,6 +330,8 @@ static int bootflow_system(struct unit_test_state *uts)
 	ut_assertok(uclass_first_device_err(UCLASS_BOOTSTD, &bootstd));
 	ut_assertok(device_bind_driver(bootstd, "bootmeth_efi_mgr", "bootmgr",
 				       &dev));
+	ut_assertok(device_probe(dev));
+	sandbox_set_fake_efi_mgr_dev(dev, true);
 
 	/* Add the system bootdev that it uses */
 	ut_assertok(device_bind_driver(bootstd, "system_bootdev",