KVM: x86: Add speculative control CPUID support for guests
CVE-2017-5715 (Spectre v2 Intel)
Provide the guest with the speculative control CPUID related values.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com> Signed-off-by: Andy Whitcroft <apw@canonical.com> Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com> Signed-off-by: Andy Whitcroft <apw@canonical.com> Acked-by: Colin Ian King <colin.king@canonical.com> Acked-by: Kamal Mostafa <kamal@canonical.com> Signed-off-by: Khalid Elmously <khalid.elmously@canonical.com>