From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jan Kiszka Subject: [PATCH] KVM: x86: Allow ARAT CPU feature Date: Sun, 24 May 2015 17:22:38 +0200 Message-ID: <5561ECBE.7010408@web.de> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="TwFJle2l8BXSeOfO2Qvucx1S6mbLXb0KA" Cc: kvm To: Paolo Bonzini Return-path: Received: from mout.web.de ([212.227.17.11]:58422 "EHLO mout.web.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751464AbbEXPWx (ORCPT ); Sun, 24 May 2015 11:22:53 -0400 Sender: kvm-owner@vger.kernel.org List-ID: This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --TwFJle2l8BXSeOfO2Qvucx1S6mbLXb0KA Content-Type: text/plain; charset=iso-8859-15 Content-Transfer-Encoding: quoted-printable From: Jan Kiszka There is no reason to deny this feature to guests. We are emulating the APIC timer, thus are exposing it without stops in power-saving states. Signed-off-by: Jan Kiszka --- arch/x86/kvm/cpuid.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c index 59b69f6..6d84a9e 100644 --- a/arch/x86/kvm/cpuid.c +++ b/arch/x86/kvm/cpuid.c @@ -411,6 +411,12 @@ static inline int __do_cpuid_ent(struct kvm_cpuid_en= try2 *entry, u32 function, } break; } + case 6: /* Thermal management */ + entry->eax =3D 0x4; /* allow ARAT */ + entry->ebx =3D 0; + entry->ecx =3D 0; + entry->edx =3D 0; + break; case 7: { entry->flags |=3D KVM_CPUID_FLAG_SIGNIFCANT_INDEX; /* Mask ebx against host capability word 9 */ @@ -587,7 +593,6 @@ static inline int __do_cpuid_ent(struct kvm_cpuid_ent= ry2 *entry, u32 function, break; case 3: /* Processor serial number */ case 5: /* MONITOR/MWAIT */ - case 6: /* Thermal management */ case 0xC0000002: case 0xC0000003: case 0xC0000004: --TwFJle2l8BXSeOfO2Qvucx1S6mbLXb0KA Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iEYEARECAAYFAlVh7L4ACgkQitSsb3rl5xRxjQCePr8tca0YRVms/TlzHNIOlDg/ 3YQAnRMsdL3q4eM2ceGjzuK1DBcistWz =6d64 -----END PGP SIGNATURE----- --TwFJle2l8BXSeOfO2Qvucx1S6mbLXb0KA--