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[209.85.128.50]) by smtp.gmail.com with ESMTPSA id bs1sm1535751edb.43.2020.06.02.06.09.38 for (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 02 Jun 2020 06:09:38 -0700 (PDT) Received: by mail-wm1-f50.google.com with SMTP id v19so2883266wmj.0 for ; Tue, 02 Jun 2020 06:09:38 -0700 (PDT) X-Received: by 2002:a05:600c:23ce:: with SMTP id p14mr4108328wmb.77.1591103377846; Tue, 02 Jun 2020 06:09:37 -0700 (PDT) MIME-Version: 1.0 References: <20200602110223.GW1195@Air-de-Roger> <20200602130114.GZ1195@Air-de-Roger> In-Reply-To: <20200602130114.GZ1195@Air-de-Roger> From: Tamas K Lengyel Date: Tue, 2 Jun 2020 07:09:01 -0600 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: [PATCH v2 for-4.14 1/3] xen/monitor: Control register values To: =?UTF-8?Q?Roger_Pau_Monn=C3=A9?= Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-BeenThere: xen-devel@lists.xenproject.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Cc: Petre Pircalabu , Stefano Stabellini , Julien Grall , Wei Liu , Andrew Cooper , Ian Jackson , George Dunlap , Jan Beulich , Alexandru Isaila , Xen-devel Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" On Tue, Jun 2, 2020 at 7:01 AM Roger Pau Monn=C3=A9 = wrote: > > On Tue, Jun 02, 2020 at 06:40:12AM -0600, Tamas K Lengyel wrote: > > On Tue, Jun 2, 2020 at 5:08 AM Roger Pau Monn=C3=A9 wrote: > > > > > > On Wed, May 20, 2020 at 08:31:52PM -0600, Tamas K Lengyel wrote: > > > > Extend the monitor_op domctl to include option that enables > > > > controlling what values certain registers are permitted to hold > > > > by a monitor subscriber. > > > > > > I think the change could benefit for some more detail commit message > > > here. Why is this useful? > > > > You would have to ask the Bitdefender folks who made the feature. I > > don't use it. Here we are just making it optional as it is buggy so it > > is disabled by default. > > > > > > > > There already seems to be some support for gating MSR writes, which > > > seems to be expanded by this commit? > > > > We don't expand on any existing features, we make an existing feature o= ptional. > > > > > > > > Is it solving some kind of bug reported? > > > > It does, please take a look at the cover letter. > > Please copy the relevant bits here for reference. Sure. As things stand I'm dropping patch 2 & 3 anyway so I'll just use the cover letter as the commit message. Tamas