From 62f375787084b1835967bc4d735bc245096b99fc Mon Sep 17 00:00:00 2001 From: Alexander Graf Date: Mon, 18 Jun 2018 17:23:00 +0200 Subject: [PATCH] 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 --- 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 -- 2.25.1