From: Matthew Garrett <matthew.garrett@nebula.com>
Date: Sun, 2 Jun 2013 22:12:25 +0000 (-0400)
Subject: UEFI: Don't pass boot services regions to SetVirtualAddressMap()
X-Git-Tag: next-20130628~36^2~8^2~2
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=1acba98f810a14b1255e34bc620594f83de37e36;p=karo-tx-linux.git

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 55856b2310d3..339e11f9b3a9 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) {