Merge patch series "various memory related fixups"

[email protected] <[email protected]> says:

From: Randolph Sapp <[email protected]>

Nitpicks and fixes from the discovery thread on adding PocketBeagle2 support
[1]. This does a lot of general setup required for the device, but these
modifications themselves aren't device specific. For those specifically
interested in PocketBeagle2 support and don't care about these details, my
development branch is public [2].

That first patch may provoke some opinions, but honestly if that warning was
still present I wouldn't have spent a week poking holes in both the EFI and LMB
allocations systems. Please let me know if there is a specific usecase that it
breaks though.

[1] https://lore.kernel.org/all/[email protected]/
[2] https://github.com/StaticRocket/u-boot/tree/feature/pocketbeagle2

Link: https://lore.kernel.org/r/[email protected]

2 files changed, 86 insertions, 0 deletions

diff --git a/test/boot/Makefile b/test/boot/Makefile
index d98f212b243..e6aa0ab7d3e 100644
--- a/test/boot/Makefile
+++ b/test/boot/Makefile
@@ -14,6 +14,9 @@ endif
 
 ifdef CONFIG_SANDBOX
 obj-$(CONFIG_$(PHASE_)CMDLINE) += bootm.o
+ifdef CONFIG_UT_DM
+obj-$(CONFIG_$(PHASE_)OF_LIBFDT) += image_fdt.o
+endif
 endif
 obj-$(CONFIG_$(PHASE_)FIT_VERITY) += fit_verity.o
 obj-$(CONFIG_MEASURED_BOOT) += measurement.o
diff --git a/test/boot/image_fdt.c b/test/boot/image_fdt.c
new file mode 100644
index 00000000000..5417689a683
--- /dev/null
+++ b/test/boot/image_fdt.c
@@ -0,0 +1,83 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2026 Texas Instruments Incorporated - https://www.ti.com/
+ */
+
+#include <config.h>
+
+#include <fdt_support.h>
+#include <image.h>
+#include <lmb.h>
+#include <malloc.h>
+
+#include <asm/global_data.h>
+
+#include <test/test.h>
+#include <test/ut.h>
+
+#define IMAGE_FDT_TEST(_name, _flags) UNIT_TEST(_name, _flags, image_fdt)
+
+DECLARE_GLOBAL_DATA_PTR;
+
+/**
+ * test_boot_fdt_add_mem_rsv_regions - Make sure dt reservations are created and
+ *                                     destroyed correctly
+ * @uts: Test state
+ *
+ * This test depends on the UT_DM device tree and ensures the following
+ * statements hold true: The default reservation in test.dtb exists.
+ * Re-reserving that region will result in an error. Loading a new device tree
+ * will remove old reservations.
+ */
+static int test_boot_fdt_add_mem_rsv_regions(struct unit_test_state *uts)
+{
+	phys_addr_t start = CFG_SYS_SDRAM_BASE + 0x100000;
+	const void *old_blob = gd->fdt_blob;
+	int ret = CMD_RET_FAILURE;
+	ulong fdt_sz;
+	int nodeoffset;
+	void *new_blob;
+
+	/* Default reservation should exist */
+	ut_asserteq(1, lmb_is_reserved_flags(start, LMB_NOMAP));
+
+	/* Attempting to re-reserve should warn the user */
+	boot_fdt_add_mem_rsv_regions(gd->fdt_blob);
+	ut_assert_nextlinen("ERROR: reserving");
+	ut_assert_console_end();
+
+	/* Loading a new_blob device tree should be allowed */
+	fdt_sz = fdt_totalsize(gd->fdt_blob);
+	new_blob = malloc(fdt_sz);
+	ut_assertnonnull(new_blob);
+	memcpy(new_blob, gd->fdt_blob, fdt_sz);
+
+	nodeoffset = fdt_path_offset(new_blob, "/reserved-memory");
+	if (nodeoffset < 0)
+		goto free_blob;
+
+	if (fdt_del_node(new_blob, nodeoffset))
+		goto free_blob;
+
+	boot_fdt_add_mem_rsv_regions(new_blob);
+	gd->fdt_blob = new_blob;
+
+	if (ut_check_console_end(uts)) {
+		ut_failf(uts, __FILE__, __LINE__, __func__, "console",
+			 "Expected no more output, got '%s'", uts->actual_str);
+		goto switch_fdt;
+	}
+
+	/* Reservation should not exist now */
+	if (!lmb_is_reserved_flags(start, LMB_NOMAP))
+		ret = 0;
+
+	/* Cleanup */
+switch_fdt:
+	boot_fdt_add_mem_rsv_regions(old_blob);
+	gd->fdt_blob = old_blob;
+free_blob:
+	free(new_blob);
+	return ret;
+}
+IMAGE_FDT_TEST(test_boot_fdt_add_mem_rsv_regions, UTF_CONSOLE);