efi_loader: Allow SMBIOS tables in highmem

We try hard to make sure that SMBIOS tables live in the lower 32bit.
However, when we can not find any space at all there, we should not
error out but instead just fall back to map them in the full address
space instead.

This can for example happen on systems that do not have any RAM mapped
in the lower 32bits of address space. In that case having any SMBIOS
tables at all is better than having none.

Signed-off-by: Alexander Graf <agraf@suse.de>

diff --git a/lib/efi_loader/efi_smbios.c b/lib/efi_loader/efi_smbios.c
index 7c3fc8af0b250f316ff37557fba4f914de07fb1f..932f7582ec619b062567b3e7051c2ebb4a0662d2 100644 (file)
--- a/lib/efi_loader/efi_smbios.c
+++ b/lib/efi_loader/efi_smbios.c
@@ -26,8 +26,15 @@ efi_status_t efi_smbios_register(void)
        /* Reserve 4kiB page for SMBIOS */
        ret = efi_allocate_pages(EFI_ALLOCATE_MAX_ADDRESS,
                                 EFI_RUNTIME_SERVICES_DATA, 1, &dmi);
-       if (ret != EFI_SUCCESS)
-               return ret;
+
+       if (ret != EFI_SUCCESS) {
+               /* Could not find space in lowmem, use highmem instead */
+               ret = efi_allocate_pages(EFI_ALLOCATE_ANY_PAGES,
+                                        EFI_RUNTIME_SERVICES_DATA, 1, &dmi);
+
+               if (ret != EFI_SUCCESS)
+                       return ret;
+       }
 
        /*
         * Generate SMBIOS tables - we know that efi_allocate_pages() returns