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Thu, 24 Oct 2024 17:55:48 +0000 (GMT) From: Niklas Schnelle Subject: [PATCH v9 0/5] treewide: Remove I/O port accessors for HAS_IOPORT=n Date: Thu, 24 Oct 2024 19:54:39 +0200 Message-Id: <20241024-b4-has_ioport-v9-0-6a6668593f71@linux.ibm.com> X-B4-Tracking: v=1; b=H4sIAN+JGmcC/33M0QqCMBiG4VuRHTeZurbZUfcREXP7zR/SyWZii PfeFIKQ6PD94HtmEsAjBHJKZuJhxICui1EeEmIa3d2Boo1NcpbzjDFOK04bHW7oeucHKpg2wkB moRIkfnoPNU6bd7nGbjAMzr82fhTr+pHkThoFZZQVtcw5s1rA8fzA7jmlWLWpcS1ZtVF+C2ovy CgokXPDSs2tlL8E9VdQUZBlAUJp0NbqvbAsyxuhkJDsMgEAAA== X-Change-ID: 20241004-b4-has_ioport-60ac6ce1deb6 To: Brian Cain , Marcel Holtmann , Luiz Augusto von Dentz , Patrik Jakobsson , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Dave Airlie , Gerd Hoffmann , Lucas De Marchi , =?utf-8?q?Thomas_Hellstr=C3=B6m?= , Rodrigo Vivi , Greg Kroah-Hartman , Jiri Slaby , Arnd Bergmann , "Maciej W. Rozycki" , Heiko Carstens Cc: linux-kernel@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-bluetooth@vger.kernel.org, dri-devel@lists.freedesktop.org, virtualization@lists.linux.dev, spice-devel@lists.freedesktop.org, intel-xe@lists.freedesktop.org, linux-serial@vger.kernel.org, linux-arch@vger.kernel.org, Niklas Schnelle , Arnd Bergmann X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=3956; i=schnelle@linux.ibm.com; h=from:subject:message-id; bh=dwa97Zv3mMxp89DjOwcC74hl8WXFjK0hXQS5Qkk1N/M=; b=owGbwMvMwCX2Wz534YHOJ2GMp9WSGNKlOn/9Tc23s9+Ytnn2beaQUpMX53o17DdMPuE2uUGgZ bHY3IvNHaUsDGJcDLJiiiyLupz91hVMMd0T1N8BM4eVCWQIAxenAEzEXIThf/Zd8bd1jy8tTfGt P9MY+cfvW5DanO1/VpzuKCkyE/JMSWJkmKYevFJimtD5l0cvW2x349jvJy1859+vPwUzL3xxElx 1hAsA X-Developer-Key: i=schnelle@linux.ibm.com; a=openpgp; fpr=9DB000B2D2752030A5F72DDCAFE43F15E8C26090 X-TM-AS-GCONF: 00 X-Proofpoint-GUID: ZzK5_Bh6ZhzA52n2zOUZDhguzOYUudTo X-Proofpoint-ORIG-GUID: oNqOtwFfRbanHLYgT_LLYcqw484r7CU5 X-Proofpoint-UnRewURL: 0 URL was un-rewritten Precedence: bulk X-Mailing-List: linux-bluetooth@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1051,Hydra:6.0.680,FMLib:17.12.62.30 definitions=2024-10-15_01,2024-10-11_01,2024-09-30_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 lowpriorityscore=0 phishscore=0 spamscore=0 mlxscore=0 mlxlogscore=999 priorityscore=1501 suspectscore=0 clxscore=1011 impostorscore=0 bulkscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2409260000 definitions=main-2410240145 Hi All, This is a follow up in my long running effort of making inb()/outb() and similar I/O port accessors compile-time optional. After initially sending this as a treewide series with the latest revision at[0] we switched to per subsystem series. Now though as we're left with only 5 patches left I'm going back to a single series with Arnd planning to take this via the the asm-generic tree. This series may also be viewed for your convenience on my git.kernel.org tree[1] under the b4/has_ioport branch. As for compile-time vs runtime see Linus' reply to my first attempt[2]. Thanks, Niklas [0] https://lore.kernel.org/all/20230522105049.1467313-1-schnelle@linux.ibm.com/ [1] https://git.kernel.org/pub/scm/linux/kernel/git/niks/linux.git [2] https://lore.kernel.org/lkml/CAHk-=wg80je=K7madF4e7WrRNp37e3qh6y10Svhdc7O8SZ_-8g@mail.gmail.com/ Signed-off-by: Niklas Schnelle --- Changes in v9: - In drm patch sort includes and reformat if (Thomas). Use IS_ENABELD() and add a helper instead of #ifdef (Arnd, Thomas) - Rebased on v6.12-rc4 - Compile tested applied to next. There are a few conflicts with drm next but they're all just context changes - Link to v8: https://lore.kernel.org/r/20241008-b4-has_ioport-v8-0-793e68aeadda@linux.ibm.com Changes in v8: - Don't remove "depends on !S390" for SERIAL_8250 - Link to v7: https://lore.kernel.org/r/20241008-b4-has_ioport-v7-0-8624c09a4d77@linux.ibm.com Changes in v7: - Renamed serial_8250_need_ioport() helper to serial_8250_warn_need_ioport() and move it to 8250_pcilib.c so it can be used in serial8250_pci_setup_port() - Flattened if in serial8250_pci_setup_port() (Maciej) - Removed gratuituous changes (Maciej) - Removed is_upf_fourport() helper in favor of zeroing UPF_FOURPORT if CONFIG_HAS_IOPORT is not set (Maciej) - Link to v6: https://lore.kernel.org/r/20241007-b4-has_ioport-v6-0-03f7240da6e5@linux.ibm.com Changes since v5 / per subsystem patches: drm: - Add HAS_IOPORT dependency for GMA500 tty: serial: - Make 8250 PCI driver emit an error message when trying to use devices which require I/O ports without CONFIG_HAS_IOPORT (Maciej) - Use early returns + dead code elimination to skip inb()/outb() uses in quirks (Arnd) - In 8250 PCI driver also handle fintek and moxi quirks - In 8250 ports code handle um's defined(__i385__) && defined(CONFIG_HAS_IOPORT) case - Use IS_ENABLED() early return also in is_upf_fourport() __always_inline to force constant folding --- Niklas Schnelle (5): hexagon: Don't select GENERIC_IOMAP without HAS_IOPORT support Bluetooth: add HAS_IOPORT dependencies drm: handle HAS_IOPORT dependencies tty: serial: handle HAS_IOPORT dependencies asm-generic/io.h: Remove I/O port accessors for HAS_IOPORT=n arch/hexagon/Kconfig | 1 - drivers/bluetooth/Kconfig | 6 ++-- drivers/gpu/drm/gma500/Kconfig | 2 +- drivers/gpu/drm/qxl/Kconfig | 2 +- drivers/gpu/drm/tiny/bochs.c | 19 ++++++++--- drivers/gpu/drm/tiny/cirrus.c | 2 ++ drivers/gpu/drm/xe/Kconfig | 2 +- drivers/tty/Kconfig | 4 +-- drivers/tty/serial/8250/8250_early.c | 4 +++ drivers/tty/serial/8250/8250_pci.c | 40 +++++++++++++++++++++++ drivers/tty/serial/8250/8250_pcilib.c | 12 ++++++- drivers/tty/serial/8250/8250_pcilib.h | 2 ++ drivers/tty/serial/8250/8250_port.c | 27 +++++++++++++--- drivers/tty/serial/8250/Kconfig | 4 +-- drivers/tty/serial/Kconfig | 2 +- include/asm-generic/io.h | 60 +++++++++++++++++++++++++++++++++++ include/linux/serial_core.h | 4 +++ 17 files changed, 171 insertions(+), 22 deletions(-) --- base-commit: 42f7652d3eb527d03665b09edac47f85fb600924 change-id: 20241004-b4-has_ioport-60ac6ce1deb6 Best regards,