From mboxrd@z Thu Jan 1 00:00:00 1970 From: Borislav Petkov Subject: Re: [PATCH v2] kvm: x86: emulate monitor and mwait instructions as nop Date: Wed, 4 Jun 2014 22:44:48 +0200 Message-ID: <20140604204448.GG4105@pd.tnic> References: <20140507205210.GA30030@ERROL.INI.CMU.EDU> <20140602192530.GC1653@ERROL.INI.CMU.EDU> <538D92BC.4060203@redhat.com> <20140604143941.GF1653@ERROL.INI.CMU.EDU> <538F30BD.5000501@suse.de> <538F4A7C.7070202@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Cc: Alexander Graf , "Gabriel L. Somlo" , kvm@vger.kernel.org, mst@redhat.com, Eduardo Habkost To: Paolo Bonzini Return-path: Received: from mail.skyhub.de ([78.46.96.112]:55801 "EHLO mail.skyhub.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751082AbaFDUpN (ORCPT ); Wed, 4 Jun 2014 16:45:13 -0400 Content-Disposition: inline In-Reply-To: <538F4A7C.7070202@redhat.com> Sender: kvm-owner@vger.kernel.org List-ID: On Wed, Jun 04, 2014 at 06:34:04PM +0200, Paolo Bonzini wrote: > That should be the purpose of KVM_GET_EMULATED_CPUID, so MWAIT could be > added in __do_cpuid_ent_emulated. However, the corresponding QEMU patches > were never included. Borislav, can you refresh them? /me goes and swaps in all the details from the discussion at that time.... tries to decipher what the whole story was about... Well, AFAIR - the operative word being "remember" - Eduardo had a problem with diffentiating between emulated features and real hw features and what was being filtered out... here's where the thread starts: http://lkml.kernel.org/r/20130923162856.GC7264@otherpad.lan.raisama.net I think we remained at that someone, maybe he, would have to clean all that discrepancy before we do the emulated gunk. Let me CC him. -- Regards/Gruss, Boris. Sent from a fat crate under my desk. Formatting is fine. --