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Tsirkin" , =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= , Eduardo Habkost , Marcel Apfelbaum , Mohamed Mediouni , Paolo Bonzini , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , Ani Sinha Subject: [PATCH v3 10/14] hw/arm: virt: cleanly fail on attempt to use the platform vGIC together with ITS Date: Sat, 2 Aug 2025 10:17:56 +0200 Message-Id: <20250802081800.76030-11-mohamed@unpredictable.fr> X-Mailer: git-send-email 2.39.5 (Apple Git-154) In-Reply-To: <20250802081800.76030-1-mohamed@unpredictable.fr> References: <20250802081800.76030-1-mohamed@unpredictable.fr> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwODAyMDA3MSBTYWx0ZWRfX90zUBLTzVBOy JYUquMfh0UsA9oAlXLE+cjk504zeXdJ5IBElVwRRjBheUJGbdzY8Snv/uEO3+j64Gw8LCjakW0c ji9Hfnz0iMX8fEyY0hZ0UdogDOxuzDcdlp5Lmgb8yDwN/1c+oWKz7sQxKETMFatOoMa8j8LxFkv DKp2ty7g64n4mqrwnwenURqVFBV1y5D8zBZbQn3CvmpAk7lEsdZLT1/q+NZYzdWwMPZ4/zh27IM KHJfGwc5X4nWAPt7DSiI+jkX6CdOrl7YmblbYe+FbLDk1bK0a1n3BBMdjdfkWYWbhJFqUuwzE= X-Proofpoint-GUID: aioGnZUk33QBwqcDg2zaDNwqrw1RPhBi X-Proofpoint-ORIG-GUID: aioGnZUk33QBwqcDg2zaDNwqrw1RPhBi X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1099,Hydra:6.1.9,FMLib:17.12.80.40 definitions=2025-08-01_08,2025-08-01_01,2025-03-28_01 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 mlxscore=0 clxscore=1030 spamscore=0 suspectscore=0 bulkscore=0 phishscore=0 mlxlogscore=880 malwarescore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.22.0-2506270000 definitions=main-2508020071 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=57.103.86.175; envelope-from=mohamed@unpredictable.fr; helo=outbound.qs.icloud.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, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, 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 @unpredictable.fr) X-ZM-MESSAGEID: 1754122911457124100 Content-Type: text/plain; charset="utf-8" Windows Hypervisor Platform's vGIC doesn't support ITS. Deal with this by reporting to the user and not creating the ITS device. Signed-off-by: Mohamed Mediouni --- hw/arm/virt.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/hw/arm/virt.c b/hw/arm/virt.c index 98a1c74c42..1c695c0642 100644 --- a/hw/arm/virt.c +++ b/hw/arm/virt.c @@ -741,6 +741,16 @@ static void create_its(VirtMachineState *vms) return; } =20 + if (whpx_enabled() && vms->tcg_its) { + /* + * In the HVF case, inform the user that they can use the + * user-mode GIC if they want to have an ITS. + */ + info_report("ITS not supported without kernel-irqchip=3Doff on WHP= X"); + info_report("Disabling ITS"); + return; + } + dev =3D qdev_new(its_class_name()); =20 object_property_set_link(OBJECT(dev), "parent-gicv3", OBJECT(vms->gic), --=20 2.39.5 (Apple Git-154)