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Fri, 19 Jun 2020 19:02:59 +0000 (UTC) Subject: Re: [PATCH] Deprecate TileGX port To: Peter Maydell , qemu-devel@nongnu.org References: <20200619154831.26319-1-peter.maydell@linaro.org> From: Thomas Huth Openpgp: preference=signencrypt Message-ID: Date: Fri, 19 Jun 2020 21:02:56 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.9.0 MIME-Version: 1.0 In-Reply-To: <20200619154831.26319-1-peter.maydell@linaro.org> Content-Language: en-US X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Received-SPF: pass client-ip=205.139.110.61; envelope-from=thuth@redhat.com; helo=us-smtp-delivery-1.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/06/19 02:45:39 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -30 X-Spam_score: -3.1 X-Spam_bar: --- X-Spam_report: (-3.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H3=-0.01, RCVD_IN_MSPIKE_WL=-0.01, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=_AUTOLEARN X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Chen Gang , =?UTF-8?Q?Philippe_Mathieu-Daud=c3=a9?= Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On 19/06/2020 17.48, Peter Maydell wrote: > Deprecate our TileGX target support: > * we have no active maintainer for it > * it has had essentially no contributions (other than tree-wide cleanups > and similar) since it was first added > * the Linux kernel dropped support in 2018, as has glibc > > Note the deprecation in the manual, but don't try to print a warning > when QEMU runs -- printing unsuppressable messages is more obtrusive > for linux-user mode than it would be for system-emulation mode, and > it doesn't seem worth trying to invent a new suppressible-error > system for linux-user just for this. I wonder whether anybody will notice the deprecation note in the manual only, though. If we want to find out whether there are still any users left, I think printing an unsuppressable message would be better... or maybe something like: if (!getenv("QEMU_SUPPRESS_TILEGX_DEPRECATION_WARNING")) { fprintf(stderr, "Warning: TileGX CPU support is deprecated and " "will be removed soon!\n" "Set QEMU_SUPPRESS_TILEGX_DEPRECATION_WARNING " "environment variable to hide this warning."); } ? > diff --git a/docs/system/deprecated.rst b/docs/system/deprecated.rst > index 3a255591c34..e9097e089bb 100644 > --- a/docs/system/deprecated.rst > +++ b/docs/system/deprecated.rst > @@ -387,6 +387,17 @@ The above, converted to the current supported format:: > > json:{"file.driver":"rbd", "file.pool":"rbd", "file.image":"name"} > > +linux-user mode CPUs > +-------------------- > + > +``tilegx`` CPUs (since 5.1.0) > +''''''''''''''''''''''''''''' > + > +The ``tilegx`` guest CPU support (which was only implemented in > +linux-user mode) is deprecated and will be removed in a future version > +of QEMU. Support for this CPU was removed from the upstream Linux > +kernel in 2018, and has also been dropped from glibc. Reviewed-by: Thomas Huth