The ARM-TF and the optional OP-TEE use the memory region 0x4000000 to 0x5400000 and should be reserved in the memory map, otherwise the OS might wrongly assume that it can use that memory area for itself. This has also been done in EDK2 [0].
[0] https://github.com/tianocore/edk2-platforms/commit/bf1c4a2cf8024669d1748e78c...
Signed-off-by: Patrick Wildt patrick@blueri.se
diff --git a/arch/arm/mach-mvebu/arm64-common.c b/arch/arm/mach-mvebu/arm64-common.c index aaf7b7c447..7572aad8c9 100644 --- a/arch/arm/mach-mvebu/arm64-common.c +++ b/arch/arm/mach-mvebu/arm64-common.c @@ -14,6 +14,7 @@ #include <asm/arch/cpu.h> #include <asm/arch/soc.h> #include <asm/armv8/mmu.h> +#include <efi_loader.h>
DECLARE_GLOBAL_DATA_PTR;
@@ -142,5 +143,11 @@ int arch_early_init_r(void) pci_init(); #endif
+#ifdef CONFIG_EFI_LOADER + /* Reserve trusted SRAM section */ + efi_add_memory_map(0x04000000, 0x01400000 >> EFI_PAGE_SHIFT, + EFI_RESERVED_MEMORY_TYPE, false); +#endif + return 0; }