From: Rusty Russell <rusty@rustcorp.com.au>
Date: Tue, 1 Nov 2011 00:15:20 +0000 (+1100)
Subject: lguest: Allow running under paravirt-enabled KVM.
X-Git-Tag: next-20111101~36^2~19
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=bd5291f5f8b8a9267fc8e93a85251628879da5eb;p=karo-tx-linux.git

lguest: Allow running under paravirt-enabled KVM.

We actually can run under KVM, as it doesn't paravirtualize anything we
need to use; reduce the check to checking we are the normal ringlevel.

Reported-by: Stefanos Geraggelos <sgerag@cslab.ece.ntua.gr>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au># HG changeset patch
---

diff --git a/drivers/lguest/core.c b/drivers/lguest/core.c
index 2535933c49f8..5c13e93898f9 100644
--- a/drivers/lguest/core.c
+++ b/drivers/lguest/core.c
@@ -313,7 +313,7 @@ static int __init init(void)
 	int err;
 
 	/* Lguest can't run under Xen, VMI or itself.  It does Tricky Stuff. */
-	if (paravirt_enabled()) {
+	if (get_kernel_rpl() != 0) {
 		printk("lguest is afraid of being a guest\n");
 		return -EPERM;
 	}