2 files changed, 14 insertions, 2 deletions

diff --git a/drivers/lguest/lguest_device.c b/drivers/lguest/lguest_device.c
index 07090f379c63..69c84a1d88ea 100644
--- a/drivers/lguest/lguest_device.c
+++ b/drivers/lguest/lguest_device.c
@@ -178,7 +178,7 @@ static void set_status(struct virtio_device *vdev, u8 status)
 
         /* We set the status. */
         to_lgdev(vdev)->desc->status = status;
-        kvm_hypercall1(LHCALL_NOTIFY, (max_pfn << PAGE_SHIFT) + offset);
+        hcall(LHCALL_NOTIFY, (max_pfn << PAGE_SHIFT) + offset, 0, 0, 0);
 }
 
 static void lg_set_status(struct virtio_device *vdev, u8 status)
@@ -229,7 +229,7 @@ static void lg_notify(struct virtqueue *vq)
          */
         struct lguest_vq_info *lvq = vq->priv;
 
-        kvm_hypercall1(LHCALL_NOTIFY, lvq->config.pfn << PAGE_SHIFT);
+        hcall(LHCALL_NOTIFY, lvq->config.pfn << PAGE_SHIFT, 0, 0, 0);
 }
 
 /* An extern declaration inside a C file is bad form.  Don't do it. */
diff --git a/drivers/lguest/x86/core.c b/drivers/lguest/x86/core.c
index fb2b7ef7868e..b4eb675a807e 100644
--- a/drivers/lguest/x86/core.c
+++ b/drivers/lguest/x86/core.c
@@ -288,6 +288,18 @@ static int emulate_insn(struct lg_cpu *cpu)
         insn = lgread(cpu, physaddr, u8);
 
         /*
+         * Around 2.6.33, the kernel started using an emulation for the
+         * cmpxchg8b instruction in early boot on many configurations.  This
+         * code isn't paravirtualized, and it tries to disable interrupts.
+         * Ignore it, which will Mostly Work.
+         */
+        if (insn == 0xfa) {
+                /* "cli", or Clear Interrupt Enable instruction.  Skip it. */
+                cpu->regs->eip++;
+                return 1;
+        }
+
+        /*
          * 0x66 is an "operand prefix".  It means it's using the upper 16 bits
          * of the eax register.
          */