From: Jan Beulich <jbeulich@suse.com>
Date: Mon, 29 Apr 2013 09:27:54 +0000 (+0200)
Subject: x86/EFI: fix runtime call status for compat mode Dom0
X-Git-Tag: archive/raspbian/4.8.0-1+rpi1~1^2~6949
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=a7ac9597a7fc6ca934957eb78b41e26638281953;p=xen.git

x86/EFI: fix runtime call status for compat mode Dom0

The top two bits (indicating error/warning classification) need to
remain the top two bits.

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Keir Fraser <keir@xen.org>
---

diff --git a/xen/arch/x86/efi/runtime.c b/xen/arch/x86/efi/runtime.c
index be3f5376b3..37bb535db7 100644
--- a/xen/arch/x86/efi/runtime.c
+++ b/xen/arch/x86/efi/runtime.c
@@ -531,7 +531,7 @@ int efi_runtime_call(struct xenpf_efi_runtime_call *op)
 #ifndef COMPAT
     op->status = status;
 #else
-    op->status = (status & 0x3fffffff) | (status >> 62);
+    op->status = (status & 0x3fffffff) | ((status >> 32) & 0xc0000000);
 #endif
 
     return rc;