[PATCH 05/15] efi: payload: early-mem: EFI_ALLOCATE_ANY_PAGES on non-x86

[Ahmad Fatoum <a.fatoum@barebox.org>]

From: Ahmad Fatoum <a.fatoum@pengutronix.de>

Using EFI_ALLOCATE_MAX_ADDRESS with an address of ~0 means that the EFI
implementation is free to give us any region it sees fit, so let's use
EFI_ALLOCATE_ANY_PAGES explicitly instead to make this clearer.

Signed-off-by: Ahmad Fatoum <a.fatoum@barebox.org>
---
 efi/payload/early-mem.c | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/efi/payload/early-mem.c b/efi/payload/early-mem.c
index b4e8790a39c4..52052f7ed128 100644
--- a/efi/payload/early-mem.c
+++ b/efi/payload/early-mem.c
@@ -9,13 +9,18 @@ efi_physical_addr_t efi_earlymem_alloc(const struct efi_system_table *sys_table,
 				       size_t *memsize)
 {
 	struct efi_boot_services *bs = sys_table->boottime;
+	enum efi_allocate_type alloc_type = EFI_ALLOCATE_ANY_PAGES;
 	efi_physical_addr_t mem;
 	efi_status_t efiret;
 
-	mem = IS_ENABLED(CONFIG_X86) ? 0x3fffffff : ~0ULL;
+	if (IS_ENABLED(CONFIG_X86)) {
+		/* Try to stay clear of memory mapped devices */
+		alloc_type = EFI_ALLOCATE_MAX_ADDRESS;
+		mem = SZ_1G - 1;
+	}
+
 	for (*memsize = SZ_256M; *memsize >= SZ_8M; *memsize /= 2) {
-		efiret  = bs->allocate_pages(EFI_ALLOCATE_MAX_ADDRESS,
-					     EFI_LOADER_DATA,
+		efiret  = bs->allocate_pages(alloc_type, EFI_LOADER_DATA,
 					     *memsize / EFI_PAGE_SIZE, &mem);
 		if (!EFI_ERROR(efiret) || efiret != EFI_OUT_OF_RESOURCES)
 			break;
-- 
2.39.5