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([2001:b07:6468:f312:5e2c:eb9a:a8b6:fd3e]) by smtp.gmail.com with ESMTPSA id l25sm3426382eda.36.2021.10.01.07.39.11 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 01 Oct 2021 07:39:12 -0700 (PDT) Message-ID: Date: Fri, 1 Oct 2021 16:39:10 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.1.0 Subject: Re: [PATCH v8 4/7] KVM: x86: Report host tsc and realtime values in KVM_GET_CLOCK Content-Language: en-US To: Oliver Upton , kvm@vger.kernel.org, kvmarm@lists.cs.columbia.edu Cc: Sean Christopherson , Marc Zyngier , Peter Shier , Jim Mattson , David Matlack , Ricardo Koller , Jing Zhang , Raghavendra Rao Anata , James Morse , Alexandru Elisei , Suzuki K Poulose , linux-arm-kernel@lists.infradead.org, Andrew Jones , Will Deacon , Catalin Marinas References: <20210916181538.968978-1-oupton@google.com> <20210916181538.968978-5-oupton@google.com> From: Paolo Bonzini In-Reply-To: <20210916181538.968978-5-oupton@google.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org On 16/09/21 20:15, Oliver Upton wrote: > + if (data.flags & ~KVM_CLOCK_REALTIME) > return -EINVAL; Let's accept KVM_CLOCK_HOST_TSC here even though it's not used; there may be programs that expect to send back to KVM_SET_CLOCK whatever they got from KVM_GET_CLOCK. 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([2001:b07:6468:f312:5e2c:eb9a:a8b6:fd3e]) by smtp.gmail.com with ESMTPSA id l25sm3426382eda.36.2021.10.01.07.39.11 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 01 Oct 2021 07:39:12 -0700 (PDT) Message-ID: Date: Fri, 1 Oct 2021 16:39:10 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.1.0 Subject: Re: [PATCH v8 4/7] KVM: x86: Report host tsc and realtime values in KVM_GET_CLOCK To: Oliver Upton , kvm@vger.kernel.org, kvmarm@lists.cs.columbia.edu References: <20210916181538.968978-1-oupton@google.com> <20210916181538.968978-5-oupton@google.com> From: Paolo Bonzini In-Reply-To: <20210916181538.968978-5-oupton@google.com> Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=pbonzini@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Language: en-US Cc: Catalin Marinas , Will Deacon , Peter Shier , Marc Zyngier , David Matlack , linux-arm-kernel@lists.infradead.org, Jim Mattson X-BeenThere: kvmarm@lists.cs.columbia.edu X-Mailman-Version: 2.1.14 Precedence: list List-Id: Where KVM/ARM decisions are made List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Errors-To: kvmarm-bounces@lists.cs.columbia.edu Sender: kvmarm-bounces@lists.cs.columbia.edu On 16/09/21 20:15, Oliver Upton wrote: > + if (data.flags & ~KVM_CLOCK_REALTIME) > return -EINVAL; Let's accept KVM_CLOCK_HOST_TSC here even though it's not used; there may be programs that expect to send back to KVM_SET_CLOCK whatever they got from KVM_GET_CLOCK. _______________________________________________ kvmarm mailing list kvmarm@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/kvmarm 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 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 52D3CC433F5 for ; Fri, 1 Oct 2021 14:41:01 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 1CF4261507 for ; 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([2001:b07:6468:f312:5e2c:eb9a:a8b6:fd3e]) by smtp.gmail.com with ESMTPSA id l25sm3426382eda.36.2021.10.01.07.39.11 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 01 Oct 2021 07:39:12 -0700 (PDT) Message-ID: Date: Fri, 1 Oct 2021 16:39:10 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.1.0 Subject: Re: [PATCH v8 4/7] KVM: x86: Report host tsc and realtime values in KVM_GET_CLOCK To: Oliver Upton , kvm@vger.kernel.org, kvmarm@lists.cs.columbia.edu Cc: Sean Christopherson , Marc Zyngier , Peter Shier , Jim Mattson , David Matlack , Ricardo Koller , Jing Zhang , Raghavendra Rao Anata , James Morse , Alexandru Elisei , Suzuki K Poulose , linux-arm-kernel@lists.infradead.org, Andrew Jones , Will Deacon , Catalin Marinas References: <20210916181538.968978-1-oupton@google.com> <20210916181538.968978-5-oupton@google.com> From: Paolo Bonzini In-Reply-To: <20210916181538.968978-5-oupton@google.com> Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=pbonzini@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Language: en-US X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20211001_073916_867245_E4D08CB8 X-CRM114-Status: UNSURE ( 6.86 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 16/09/21 20:15, Oliver Upton wrote: > + if (data.flags & ~KVM_CLOCK_REALTIME) > return -EINVAL; Let's accept KVM_CLOCK_HOST_TSC here even though it's not used; there may be programs that expect to send back to KVM_SET_CLOCK whatever they got from KVM_GET_CLOCK. _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel