[U-Boot] [PATCH v4 06/21] efi_loader: Allow SMBIOS tables in highmem

[Alexander Graf <agraf@suse.de>]

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.

Signed-off-by: Alexander Graf <agraf@suse.de>
---
 lib/efi_loader/efi_smbios.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/lib/efi_loader/efi_smbios.c b/lib/efi_loader/efi_smbios.c
index 7c3fc8af0b..932f7582ec 100644
--- 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
-- 
2.12.3