From mboxrd@z Thu Jan 1 00:00:00 1970 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=-14.0 required=3.0 tests=BAYES_00,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 1E6FBC4332B for ; Tue, 2 Feb 2021 19:37:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id DF9C564E56 for ; Tue, 2 Feb 2021 19:37:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239905AbhBBThS (ORCPT ); Tue, 2 Feb 2021 14:37:18 -0500 Received: from mail.kernel.org ([198.145.29.99]:43126 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233346AbhBBNzM (ORCPT ); Tue, 2 Feb 2021 08:55:12 -0500 Received: from disco-boy.misterjones.org (disco-boy.misterjones.org [51.254.78.96]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id A4B2764FDB; Tue, 2 Feb 2021 13:44:49 +0000 (UTC) Received: from disco-boy.misterjones.org ([51.254.78.96] helo=www.loen.fr) by disco-boy.misterjones.org with esmtpsa (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 (Exim 4.94) (envelope-from ) id 1l6vz5-00BVMI-JP; Tue, 02 Feb 2021 13:44:47 +0000 MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 7bit Date: Tue, 02 Feb 2021 13:44:47 +0000 From: Marc Zyngier To: Jianyong Wu Cc: netdev@vger.kernel.org, yangbo.lu@nxp.com, john.stultz@linaro.org, tglx@linutronix.de, pbonzini@redhat.com, sean.j.christopherson@intel.com, richardcochran@gmail.com, Mark.Rutland@arm.com, will@kernel.org, suzuki.poulose@arm.com, Andre.Przywara@arm.com, steven.price@arm.com, 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, nd@arm.com Subject: Re: [PATCH v16 9/9] arm64: Add kvm capability check extension for ptp_kvm In-Reply-To: <20201209060932.212364-10-jianyong.wu@arm.com> References: <20201209060932.212364-1-jianyong.wu@arm.com> <20201209060932.212364-10-jianyong.wu@arm.com> User-Agent: Roundcube Webmail/1.4.10 Message-ID: <13893254f802799ba44b9a35317b32f5@kernel.org> X-Sender: maz@kernel.org X-SA-Exim-Connect-IP: 51.254.78.96 X-SA-Exim-Rcpt-To: jianyong.wu@arm.com, netdev@vger.kernel.org, yangbo.lu@nxp.com, john.stultz@linaro.org, tglx@linutronix.de, pbonzini@redhat.com, sean.j.christopherson@intel.com, richardcochran@gmail.com, Mark.Rutland@arm.com, will@kernel.org, suzuki.poulose@arm.com, Andre.Przywara@arm.com, steven.price@arm.com, 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, nd@arm.com X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org On 2020-12-09 06:09, Jianyong Wu wrote: > 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 f60f4a5e1a22..1bb1f64f9bb5 100644 > --- a/arch/arm64/kvm/arm.c > +++ b/arch/arm64/kvm/arm.c > @@ -199,6 +199,7 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, > long ext) > case KVM_CAP_ARM_INJECT_EXT_DABT: > case KVM_CAP_SET_GUEST_DEBUG: > case KVM_CAP_VCPU_ATTRIBUTES: > + 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 This really should be squashed with the patch implementing the hypercall. Thanks, M. -- Jazz is not dead. It just smells funny...