Add the sysfs reporting file for MDS. It exposes the vulnerability and
mitigation state similar to the existing files for the other speculative
hardware vulnerabilities.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Borislav Petkov <bp@suse.de>

CVE-2018-12126
CVE-2018-12127
CVE-2018-12130

(backported from commit bd8651092f9656672e53feb1f8e793a0b960138d)
[juergh:
 - Used x86_hyper instead of hypervisor_is_type() in bugs.c.
 - Included <asm/hypervisor.h> for x86_hyper.]
Signed-off-by: Juerg Haefliger <juergh@canonical.com>
Acked-by: Tyler Hicks <tyhicks@canonical.com>
Acked-by: Stefan Bader <stefan.bader@canonical.com>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>