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Mon, 28 Apr 2025 09:10:41 -0700 (PDT) From: Tomita Moeko To: Alex Williamson , =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= , Tomita Moeko Cc: qemu-devel@nongnu.org, =?UTF-8?q?Corvin=20K=C3=B6hne?= Subject: [PATCH 6/9] vfio/igd: Enable OpRegion by default Date: Tue, 29 Apr 2025 00:10:01 +0800 Message-ID: <20250428161004.35613-7-tomitamoeko@gmail.com> X-Mailer: git-send-email 2.47.2 In-Reply-To: <20250428161004.35613-1-tomitamoeko@gmail.com> References: <20250428161004.35613-1-tomitamoeko@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2607:f8b0:4864:20::644; envelope-from=tomitamoeko@gmail.com; helo=mail-pl1-x644.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @gmail.com) X-ZM-MESSAGEID: 1745856906991019100 Content-Type: text/plain; charset="utf-8" As the presence of OpRegion is used to detect IGD device now, and guest driver usually depends on OpRegion to work. Enable OpRegion on IGD devices by default for out-of-the-box passthrough experience (except pre-boot display output), especially for libvirt users. Example of IGD passthrough with libvirt:
Signed-off-by: Tomita Moeko Reviewed-by: Corvin K=C3=B6hne --- docs/igd-assign.txt | 4 ++-- hw/vfio/pci.c | 2 +- 2 files changed, 3 insertions(+), 3 deletions(-) diff --git a/docs/igd-assign.txt b/docs/igd-assign.txt index 95beb76812..fc444503ff 100644 --- a/docs/igd-assign.txt +++ b/docs/igd-assign.txt @@ -102,7 +102,7 @@ digital formats work well. =20 Options =3D=3D=3D=3D=3D=3D=3D -* x-igd-opregion=3D[on|*off*] +* x-igd-opregion=3D[*on*|off] Copy host IGD OpRegion and expose it to guest with fw_cfg =20 * x-igd-lpc=3D[on|*off*] @@ -124,7 +124,7 @@ Examples =20 * Adding IGD with OpRegion and LPC ID hack, but without VGA ranges (For UEFI guests) - -device vfio-pci,host=3D00:02.0,id=3Dhostdev0,addr=3D2.0,x-igd-legacy-mo= de=3Doff,x-igd-opregion=3Don,x-igd-lpc=3Don,romfile=3Defi_oprom.rom + -device vfio-pci,host=3D00:02.0,id=3Dhostdev0,addr=3D2.0,x-igd-legacy-mo= de=3Doff,x-igd-lpc=3Don,romfile=3Defi_oprom.rom =20 =20 Guest firmware diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c index 05a7a62204..38ff231625 100644 --- a/hw/vfio/pci.c +++ b/hw/vfio/pci.c @@ -3361,7 +3361,7 @@ static const Property vfio_pci_dev_properties[] =3D { DEFINE_PROP_BIT("x-req", VFIOPCIDevice, features, VFIO_FEATURE_ENABLE_REQ_BIT, true), DEFINE_PROP_BIT("x-igd-opregion", VFIOPCIDevice, features, - VFIO_FEATURE_ENABLE_IGD_OPREGION_BIT, false), + VFIO_FEATURE_ENABLE_IGD_OPREGION_BIT, true), DEFINE_PROP_BIT("x-igd-lpc", VFIOPCIDevice, features, VFIO_FEATURE_ENABLE_IGD_LPC_BIT, false), DEFINE_PROP_ON_OFF_AUTO("x-igd-legacy-mode", VFIOPCIDevice, --=20 2.47.2