From patchwork Wed Nov 11 06:22:11 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jianyong Wu X-Patchwork-Id: 11896379 X-Patchwork-Delegate: kuba@kernel.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 33E2AC55ABD for ; Wed, 11 Nov 2020 06:23:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D9AB020786 for ; Wed, 11 Nov 2020 06:23:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726258AbgKKGXu (ORCPT ); Wed, 11 Nov 2020 01:23:50 -0500 Received: from foss.arm.com ([217.140.110.172]:41922 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726231AbgKKGXi (ORCPT ); Wed, 11 Nov 2020 01:23:38 -0500 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 9F8F514BF; Tue, 10 Nov 2020 22:23:37 -0800 (PST) Received: from localhost.localdomain (entos-thunderx2-desktop.shanghai.arm.com [10.169.212.215]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 48D123F6CF; Tue, 10 Nov 2020 22:23:31 -0800 (PST) From: Jianyong Wu To: netdev@vger.kernel.org, yangbo.lu@nxp.com, john.stultz@linaro.org, tglx@linutronix.de, pbonzini@redhat.com, sean.j.christopherson@intel.com, maz@kernel.org, richardcochran@gmail.com, Mark.Rutland@arm.com, will@kernel.org, suzuki.poulose@arm.com, Andre.Przywara@arm.com, steven.price@arm.com Cc: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org, Steve.Capper@arm.com, justin.he@arm.com, jianyong.wu@arm.com, nd@arm.com Subject: [PATCH v15 9/9] arm64: Add kvm capability check extension for ptp_kvm Date: Wed, 11 Nov 2020 14:22:11 +0800 Message-Id: <20201111062211.33144-10-jianyong.wu@arm.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20201111062211.33144-1-jianyong.wu@arm.com> References: <20201111062211.33144-1-jianyong.wu@arm.com> Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Let userspace check if there is kvm ptp service in host. Before VMs migrate to another host, VMM may check if this cap is available to determine the next behavior. Signed-off-by: Jianyong Wu Suggested-by: Marc Zyngier --- arch/arm64/kvm/arm.c | 1 + include/uapi/linux/kvm.h | 1 + 2 files changed, 2 insertions(+) diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c index 5750ec34960e..c05279de507d 100644 --- a/arch/arm64/kvm/arm.c +++ b/arch/arm64/kvm/arm.c @@ -182,6 +182,7 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext) case KVM_CAP_ARM_IRQ_LINE_LAYOUT_2: case KVM_CAP_ARM_NISV_TO_USER: case KVM_CAP_ARM_INJECT_EXT_DABT: + case KVM_CAP_PTP_KVM: r = 1; break; case KVM_CAP_ARM_SET_DEVICE_ADDR: diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h index ca41220b40b8..797c40bbc31f 100644 --- a/include/uapi/linux/kvm.h +++ b/include/uapi/linux/kvm.h @@ -1053,6 +1053,7 @@ struct kvm_ppc_resize_hpt { #define KVM_CAP_X86_USER_SPACE_MSR 188 #define KVM_CAP_X86_MSR_FILTER 189 #define KVM_CAP_ENFORCE_PV_FEATURE_CPUID 190 +#define KVM_CAP_PTP_KVM 191 #ifdef KVM_CAP_IRQ_ROUTING