From patchwork Thu Oct 4 20:48:53 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Eduardo Habkost X-Patchwork-Id: 189319 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id 0E0BE2C039E for ; Fri, 5 Oct 2012 06:49:29 +1000 (EST) Received: from localhost ([::1]:60484 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TJsMG-0004IC-MF for incoming@patchwork.ozlabs.org; Thu, 04 Oct 2012 16:49:24 -0400 Received: from eggs.gnu.org ([208.118.235.92]:40900) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TJsLm-0003Xl-Sy for qemu-devel@nongnu.org; Thu, 04 Oct 2012 16:49:09 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1TJsL7-0003p2-53 for qemu-devel@nongnu.org; Thu, 04 Oct 2012 16:48:54 -0400 Received: from mx1.redhat.com ([209.132.183.28]:8422) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TJsL6-0003ob-Sb for qemu-devel@nongnu.org; Thu, 04 Oct 2012 16:48:13 -0400 Received: from int-mx12.intmail.prod.int.phx2.redhat.com (int-mx12.intmail.prod.int.phx2.redhat.com [10.5.11.25]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id q94KmBBG008032 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Thu, 4 Oct 2012 16:48:12 -0400 Received: from blackpad.lan.raisama.net (vpn1-7-183.gru2.redhat.com [10.97.7.183]) by int-mx12.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id q94KmBDS028256; Thu, 4 Oct 2012 16:48:11 -0400 Received: by blackpad.lan.raisama.net (Postfix, from userid 500) id A982C203603; Thu, 4 Oct 2012 17:49:11 -0300 (BRT) From: Eduardo Habkost To: qemu-devel@nongnu.org Date: Thu, 4 Oct 2012 17:48:53 -0300 Message-Id: <1349383747-19383-2-git-send-email-ehabkost@redhat.com> In-Reply-To: <1349383747-19383-1-git-send-email-ehabkost@redhat.com> References: <1349383747-19383-1-git-send-email-ehabkost@redhat.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.25 X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 209.132.183.28 Cc: kvm@vger.kernel.org, Gleb Natapov , Marcelo Tosatti , Avi Kivity , Igor Mammedov , =?UTF-8?q?Andreas=20F=C3=A4rber?= Subject: [Qemu-devel] [PATCH 01/15] i386: kvm: kvm_arch_get_supported_cpuid: move R_EDX hack outside of for loop X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org The for loop will become a separate function, so clean it up so it can become independent from the bit hacking for R_EDX. No behavior change[1], just code movement. [1] Well, only if the kernel returned CPUID leafs 1 or 0x80000001 as unsupported, but there's no kernel version that does that. Signed-off-by: Eduardo Habkost --- target-i386/kvm.c | 31 ++++++++++++++++++------------- 1 file changed, 18 insertions(+), 13 deletions(-) diff --git a/target-i386/kvm.c b/target-i386/kvm.c index 5b18383..8b4ab34 100644 --- a/target-i386/kvm.c +++ b/target-i386/kvm.c @@ -155,24 +155,29 @@ uint32_t kvm_arch_get_supported_cpuid(KVMState *s, uint32_t function, break; case R_EDX: ret = cpuid->entries[i].edx; - switch (function) { - case 1: - /* KVM before 2.6.30 misreports the following features */ - ret |= CPUID_MTRR | CPUID_PAT | CPUID_MCE | CPUID_MCA; - break; - case 0x80000001: - /* On Intel, kvm returns cpuid according to the Intel spec, - * so add missing bits according to the AMD spec: - */ - cpuid_1_edx = kvm_arch_get_supported_cpuid(s, 1, 0, R_EDX); - ret |= cpuid_1_edx & CPUID_EXT2_AMD_ALIASES; - break; - } break; } } } + /* Fixups for the data returned by KVM, below */ + + if (reg == R_EDX) { + switch (function) { + case 1: + /* KVM before 2.6.30 misreports the following features */ + ret |= CPUID_MTRR | CPUID_PAT | CPUID_MCE | CPUID_MCA; + break; + case 0x80000001: + /* On Intel, kvm returns cpuid according to the Intel spec, + * so add missing bits according to the AMD spec: + */ + cpuid_1_edx = kvm_arch_get_supported_cpuid(s, 1, 0, R_EDX); + ret |= cpuid_1_edx & CPUID_EXT2_AMD_ALIASES; + break; + } + } + g_free(cpuid); /* fallback for older kernels */