From 53243fd526c463f30067166641d4dd430193233a Mon Sep 17 00:00:00 2001 From: Daniel Kiper Date: Mon, 30 Jun 2014 19:52:57 +0200 Subject: [PATCH] arch/x86: Do not access EFI memory map if it is not available Do not access EFI memory map if it is not available. At least Xen dom0 EFI implementation does not have an access to it. Signed-off-by: Daniel Kiper Signed-off-by: Matt Fleming --- arch/x86/platform/efi/efi.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/x86/platform/efi/efi.c b/arch/x86/platform/efi/efi.c index b405972096238..7d627a02ed82d 100644 --- a/arch/x86/platform/efi/efi.c +++ b/arch/x86/platform/efi/efi.c @@ -946,6 +946,9 @@ u64 efi_mem_attributes(unsigned long phys_addr) efi_memory_desc_t *md; void *p; + if (!efi_enabled(EFI_MEMMAP)) + return 0; + for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) { md = p; if ((md->phys_addr <= phys_addr) && -- 2.39.5