From patchwork Wed May 5 21:27:16 2010 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Glauber Costa X-Patchwork-Id: 97217 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by demeter.kernel.org (8.14.3/8.14.3) with ESMTP id o45LWN2H027662 for ; Wed, 5 May 2010 21:32:25 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758687Ab0EEVbD (ORCPT ); Wed, 5 May 2010 17:31:03 -0400 Received: from mx1.redhat.com ([209.132.183.28]:50836 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758625Ab0EEV3j (ORCPT ); Wed, 5 May 2010 17:29:39 -0400 Received: from int-mx03.intmail.prod.int.phx2.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.16]) by mx1.redhat.com (8.13.8/8.13.8) with ESMTP id o45LTcTL030806 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Wed, 5 May 2010 17:29:38 -0400 Received: from localhost.localdomain (virtlab1.virt.bos.redhat.com [10.16.72.21]) by int-mx03.intmail.prod.int.phx2.redhat.com (8.13.8/8.13.8) with ESMTP id o45LTVil028433; Wed, 5 May 2010 17:29:37 -0400 From: Glauber Costa To: kvm@vger.kernel.org Cc: linux-kernel@vger.kernel.org, avi@redhat.com, zamsden@redhat.com Subject: [PATCH v3 5/8] export paravirtual cpuid flags in KVM_GET_SUPPORTED_CPUID Date: Wed, 5 May 2010 17:27:16 -0400 Message-Id: <1273094839-18655-6-git-send-email-glommer@redhat.com> In-Reply-To: <1273094839-18655-5-git-send-email-glommer@redhat.com> References: <1273094839-18655-1-git-send-email-glommer@redhat.com> <1273094839-18655-2-git-send-email-glommer@redhat.com> <1273094839-18655-3-git-send-email-glommer@redhat.com> <1273094839-18655-4-git-send-email-glommer@redhat.com> <1273094839-18655-5-git-send-email-glommer@redhat.com> X-Scanned-By: MIMEDefang 2.67 on 10.5.11.16 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.3 (demeter.kernel.org [140.211.167.41]); Wed, 05 May 2010 21:32:26 +0000 (UTC) diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index eb84947..9295198 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -1971,6 +1971,23 @@ static void do_cpuid_ent(struct kvm_cpuid_entry2 *entry, u32 function, } break; } + case KVM_CPUID_SIGNATURE: { + char signature[12] = "KVMKVMKVM\0\0"; + u32 *sigptr = (u32 *)signature; + entry->eax = 1; + entry->ebx = sigptr[0]; + entry->ecx = sigptr[1]; + entry->edx = sigptr[2]; + break; + } + case KVM_CPUID_FEATURES: + entry->eax = (1 << KVM_FEATURE_CLOCKSOURCE) | + (1 << KVM_FEATURE_NOP_IO_DELAY) | + (1 << KVM_FEATURE_CLOCKSOURCE2); + entry->ebx = 0; + entry->ecx = 0; + entry->edx = 0; + break; case 0x80000000: entry->eax = min(entry->eax, 0x8000001a); break; @@ -2017,6 +2034,19 @@ static int kvm_dev_ioctl_get_supported_cpuid(struct kvm_cpuid2 *cpuid, for (func = 0x80000001; func <= limit && nent < cpuid->nent; ++func) do_cpuid_ent(&cpuid_entries[nent], func, 0, &nent, cpuid->nent); + + + + r = -E2BIG; + if (nent >= cpuid->nent) + goto out_free; + + do_cpuid_ent(&cpuid_entries[nent], KVM_CPUID_SIGNATURE, 0, &nent, + cpuid->nent); + + do_cpuid_ent(&cpuid_entries[nent], KVM_CPUID_FEATURES, 0, &nent, + cpuid->nent); + r = -E2BIG; if (nent >= cpuid->nent) goto out_free;