Use allocate_pages() instead of allocate_pool(). With allocate_pages() we
can specify the address. This way, any address passed to the kernel will
never exceed the lower 32 bit.
If possible, try to allocate a larger pool.

Signed-off-by: Michael Olbrich <m.olbr...@pengutronix.de>
---
 arch/efi/efi/efi.c | 20 +++++++++++++++++---
 1 file changed, 17 insertions(+), 3 deletions(-)

diff --git a/arch/efi/efi/efi.c b/arch/efi/efi/efi.c
index d351775a2868..c05d183c02fa 100644
--- a/arch/efi/efi/efi.c
+++ b/arch/efi/efi/efi.c
@@ -310,7 +310,8 @@ device_initcall(efi_init);
  */
 efi_status_t efi_main(efi_handle_t image, efi_system_table_t *sys_table)
 {
-       void *mem;
+       efi_physical_addr_t mem;
+       size_t memsize;
        efi_status_t efiret;
 
 #ifdef DEBUG
@@ -332,8 +333,21 @@ efi_status_t efi_main(efi_handle_t image, 
efi_system_table_t *sys_table)
 
        fixup_tables();
 
-       BS->allocate_pool(efi_loaded_image->image_data_type, SZ_16M, &mem);
-       mem_malloc_init(mem, mem + SZ_16M);
+       mem = 0x3fffffff;
+       for (memsize = SZ_256M; memsize >= SZ_8M; memsize /= 2) {
+               efiret  = BS->allocate_pages(EFI_ALLOCATE_MAX_ADDRESS,
+                                            EFI_LOADER_DATA,
+                                            memsize/PAGE_SIZE, &mem);
+               if (!EFI_ERROR(efiret))
+                       break;
+               if (efiret != EFI_OUT_OF_RESOURCES)
+                       panic("failed to allocate malloc pool: %s\n",
+                             efi_strerror(efiret));
+       }
+       if (EFI_ERROR(efiret))
+               panic("failed to allocate malloc pool: %s\n",
+                     efi_strerror(efiret));
+       mem_malloc_init((void *)mem, (void *)mem + memsize);
 
        efi_clocksource_init();
 
-- 
2.1.4


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