KVM: X86: Don't report L2 emulation failures to user-space

This patch prevents that emulation failures which result
from emulating an instruction for an L2-Guest results in
being reported to userspace.
Without this patch a malicious L2-Guest would be able to
kill the L1 by triggering a race-condition between an vmexit
and the instruction emulator.
With this patch the L2 will most likely only kill itself in
this situation.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
static unsigned long kvm_get_guest_ip(void)
{
	unsigned long ip = 0;

	if (percpu_read(current_vcpu))
		ip = kvm_rip_read(percpu_read(current_vcpu));

	return ip;
}

static unsigned long kvm_get_guest_ip(void)
{
	unsigned long ip = 0;

	if (percpu_read(current_vcpu))
		ip = kvm_rip_read(percpu_read(current_vcpu));

	return ip;
}
