From patchwork Wed Jul 20 03:41:36 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sam Bobroff X-Patchwork-Id: 650539 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 3rvN5N1Lfqz9sxS for ; Wed, 20 Jul 2016 13:42:16 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753340AbcGTDlu (ORCPT ); Tue, 19 Jul 2016 23:41:50 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:43905 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1753327AbcGTDlp (ORCPT ); Tue, 19 Jul 2016 23:41:45 -0400 Received: from pps.filterd (m0098417.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.11/8.16.0.11) with SMTP id u6K3cwfs054100 for ; Tue, 19 Jul 2016 23:41:44 -0400 Received: from e23smtp07.au.ibm.com (e23smtp07.au.ibm.com [202.81.31.140]) by mx0a-001b2d01.pphosted.com with ESMTP id 2495r8kwj5-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Tue, 19 Jul 2016 23:41:44 -0400 Received: from localhost by e23smtp07.au.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; Wed, 20 Jul 2016 13:41:39 +1000 X-IBM-Helo: d23dlp03.au.ibm.com X-IBM-MailFrom: sam.bobroff@au1.ibm.com X-IBM-RcptTo: kvm-ppc@vger.kernel.org;kvm@vger.kernel.org Received: from d23relay09.au.ibm.com (d23relay09.au.ibm.com [9.185.63.181]) by d23dlp03.au.ibm.com (Postfix) with ESMTP id D24423578057; Wed, 20 Jul 2016 13:41:38 +1000 (EST) Received: from d23av02.au.ibm.com (d23av02.au.ibm.com [9.190.235.138]) by d23relay09.au.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id u6K3fcoo23724276; Wed, 20 Jul 2016 13:41:38 +1000 Received: from d23av02.au.ibm.com (localhost [127.0.0.1]) by d23av02.au.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id u6K3fbnw015707; Wed, 20 Jul 2016 13:41:38 +1000 Received: from ozlabs.au.ibm.com (ozlabs.au.ibm.com [9.192.253.14]) by d23av02.au.ibm.com (8.14.4/8.14.4/NCO v10.0 AVin) with ESMTP id u6K3fbN4015704; Wed, 20 Jul 2016 13:41:37 +1000 Received: from tungsten.ozlabs.ibm.com (haven.au.ibm.com [9.192.254.114]) (using TLSv1.2 with cipher AES128-SHA256 (128/128 bits)) (No client certificate requested) by ozlabs.au.ibm.com (Postfix) with ESMTPSA id A8394A021B; Wed, 20 Jul 2016 13:41:36 +1000 (AEST) From: Sam Bobroff To: linuxppc-dev@lists.ozlabs.org Cc: kvm-ppc@vger.kernel.org, kvm@vger.kernel.org, david@gibson.dropbear.id.au, aik@ozlabs.ru, mpe@ellerman.id.au, agraf@suse.de, qemu-devel@nongnu.org, paulus@samba.org Subject: [PATCH v2 1/1] KVM: PPC: Introduce KVM_CAP_PPC_HTM Date: Wed, 20 Jul 2016 13:41:36 +1000 X-Mailer: git-send-email 2.1.4 X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 16072003-0044-0000-0000-000001C398F4 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 16072003-0045-0000-0000-00000526B89F Message-Id: <7286403003b30fc87740f1c1d6cb67d8f8eaafd7.1468986094.git.sam.bobroff@au1.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:, , definitions=2016-07-20_03:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 suspectscore=1 malwarescore=0 phishscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1604210000 definitions=main-1607200041 Sender: kvm-ppc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm-ppc@vger.kernel.org Introduce a new KVM capability, KVM_CAP_PPC_HTM, that can be queried to determine if a PowerPC KVM guest should use HTM (Hardware Transactional Memory). This will be used by QEMU to populate the pa-features bits in the guest's device tree. Signed-off-by: Sam Bobroff Acked-by: Balbir Singh Reviewed-by: David Gibson --- v2: * Use CPU_FTR_TM_COMP instead of CPU_FTR_TM. * I didn't unbreak the line, as with the extra characters checkpatch will complain if I do. I did move the break to a more usual place. arch/powerpc/kvm/powerpc.c | 4 ++++ include/uapi/linux/kvm.h | 1 + 2 files changed, 5 insertions(+) diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c index 02416fe..5ebc8ff 100644 --- a/arch/powerpc/kvm/powerpc.c +++ b/arch/powerpc/kvm/powerpc.c @@ -588,6 +588,10 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext) r = 1; break; #endif + case KVM_CAP_PPC_HTM: + r = cpu_has_feature(CPU_FTR_TM_COMP) && + is_kvmppc_hv_enabled(kvm); + break; default: r = 0; break; diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h index 05ebf47..f421d0e 100644 --- a/include/uapi/linux/kvm.h +++ b/include/uapi/linux/kvm.h @@ -866,6 +866,7 @@ struct kvm_ppc_smmu_info { #define KVM_CAP_ARM_PMU_V3 126 #define KVM_CAP_VCPU_ATTRIBUTES 127 #define KVM_CAP_MAX_VCPU_ID 128 +#define KVM_CAP_PPC_HTM 129 #ifdef KVM_CAP_IRQ_ROUTING