From 1acba98f810a14b1255e34bc620594f83de37e36 Mon Sep 17 00:00:00 2001
From: Matthew Garrett <matthew.garrett@nebula.com>
Date: Sun, 2 Jun 2013 18:12:25 -0400
Subject: UEFI: Don't pass boot services regions to SetVirtualAddressMap()

We need to map boot services regions during startup in order to avoid
firmware bugs, but we shouldn't be passing those regions to
SetVirtualAddressMap(). Ensure that we're only passing regions that are
marked as being mapped at runtime.

Signed-off-by: Matthew Garrett <matthew.garrett@nebula.com>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>

diff --git a/arch/x86/platform/efi/efi.c b/arch/x86/platform/efi/efi.c
index 55856b2..339e11f 100644
--- a/arch/x86/platform/efi/efi.c
+++ b/arch/x86/platform/efi/efi.c
@@ -1026,6 +1026,13 @@ void __init efi_enter_virtual_mode(void)
 			va = efi_ioremap(md->phys_addr, size,
 					 md->type, md->attribute);
 
+		if (!(md->attribute & EFI_MEMORY_RUNTIME)) {
+			if (!va)
+				pr_err("ioremap of 0x%llX failed!\n",
+				       (unsigned long long)md->phys_addr);
+			continue;
+		}
+
 		md->virt_addr = (u64) (unsigned long) va;
 
 		if (!va) {
-- 
cgit v0.10.2