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Tsirkin" , Mads Ynddal , Cameron Esfahani Subject: [PATCH v12 07/28] hw: arm: virt: rework MSI-X configuration Date: Mon, 29 Dec 2025 00:54:01 +0100 Message-ID: <20251228235422.30383-8-mohamed@unpredictable.fr> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20251228235422.30383-1-mohamed@unpredictable.fr> References: <20251228235422.30383-1-mohamed@unpredictable.fr> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Proofpoint-GUID: jjMYuaYJZqi710jWnINboyTR2tPgNPMY X-Authority-Info: v=2.4 cv=V51wEOni c=1 sm=1 tr=0 ts=6951c3ae cx=c_apl:c_pps a=azHRBMxVc17uSn+fyuI/eg==:117 a=azHRBMxVc17uSn+fyuI/eg==:17 a=wP3pNCr1ah4A:10 a=VkNPw1HP01LnGYTKEx00:22 a=IPYOmMg1pR9sqvhpA7gA:9 X-Proofpoint-ORIG-GUID: jjMYuaYJZqi710jWnINboyTR2tPgNPMY X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUxMjI4MDIyMyBTYWx0ZWRfXw5qjssVfB3G8 mtIfb9SOBnNGJq8hofbTtC/vRJVqR70Svag768FLoCJHgFhpjqU1rm977Mffi3rnfzZC965OkHc /hKCdWy2z8+extAWbpr0hEhKJvDglVl7VrPV8XiTcCIxrRqGuwnIrYeAt2jFSID3eFlUNfl7Rni YkMqpQxdfBzhb3Jw/nBgYc4Icb72uDWfGoHUThluC+Q79C/J6adxvKcXYoRr9mqG/Su3JtDkPVe E+y5uy+SphqRtU/ed+ctDgXVBJV24f2WWk7WqMevUfccY9AFoAs+kKFYHHuPh5PBpJtLH2KSDbh 5/8xPja6iukY+rs+Xjx X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.9,FMLib:17.12.100.49 definitions=2025-12-28_07,2025-12-26_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 mlxlogscore=958 malwarescore=0 suspectscore=0 adultscore=0 phishscore=0 mlxscore=0 spamscore=0 clxscore=1030 bulkscore=0 classifier=spam authscore=0 adjust=0 reason=mlx scancount=1 engine=8.22.0-2510240001 definitions=main-2512280223 X-JNJ: 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 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 (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=57.103.65.171; envelope-from=mohamed@unpredictable.fr; helo=outbound.pv.icloud.com X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 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_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H4=-0.01, RCVD_IN_MSPIKE_WL=-0.01, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=unavailable 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: 1766966383861158500 Content-Type: text/plain; charset="utf-8" Introduce a -M msi=3D argument to be able to control MSI-X support independ= ently from ITS, as part of supporting GICv3 + GICv2m platforms. Remove vms->its as it's no longer needed after that change. Signed-off-by: Mohamed Mediouni Reviewed-by: Pierrick Bouvier --- hw/arm/virt-acpi-build.c | 3 +- hw/arm/virt.c | 112 +++++++++++++++++++++++++++++++-------- include/hw/arm/virt.h | 4 +- 3 files changed, 95 insertions(+), 24 deletions(-) diff --git a/hw/arm/virt-acpi-build.c b/hw/arm/virt-acpi-build.c index 86024a1a73..f3adb95cfe 100644 --- a/hw/arm/virt-acpi-build.c +++ b/hw/arm/virt-acpi-build.c @@ -962,8 +962,7 @@ build_madt(GArray *table_data, BIOSLinker *linker, Virt= MachineState *vms) } } =20 - if (!(vms->gic_version !=3D VIRT_GIC_VERSION_2 && virt_is_its_enabled(= vms)) - && !vms->no_gicv3_with_gicv2m) { + if (virt_is_gicv2m_enabled(vms)) { const uint16_t spi_base =3D vms->irqmap[VIRT_GIC_V2M] + ARM_SPI_BA= SE; =20 /* 5.2.12.16 GIC MSI Frame Structure */ diff --git a/hw/arm/virt.c b/hw/arm/virt.c index dcdb740586..80c9b2bc76 100644 --- a/hw/arm/virt.c +++ b/hw/arm/virt.c @@ -966,12 +966,12 @@ static void create_gic(VirtMachineState *vms, MemoryR= egion *mem) =20 fdt_add_gic_node(vms); =20 - if (vms->gic_version !=3D VIRT_GIC_VERSION_2 && virt_is_its_enabled(vm= s)) { + if (virt_is_its_enabled(vms)) { create_its(vms); - } else if (vms->gic_version !=3D VIRT_GIC_VERSION_2 && !vms->no_gicv3_= with_gicv2m) { - create_v2m(vms); - } else if (vms->gic_version =3D=3D VIRT_GIC_VERSION_2) { + } else if (virt_is_gicv2m_enabled(vms)) { create_v2m(vms); + } else { + vms->msi_controller =3D VIRT_MSI_CTRL_NONE; } } =20 @@ -2710,32 +2710,95 @@ static void virt_set_highmem_mmio_size(Object *obj,= Visitor *v, =20 bool virt_is_its_enabled(VirtMachineState *vms) { - if (vms->its =3D=3D ON_OFF_AUTO_OFF) { - return false; + switch (vms->msi_controller) { + case VIRT_MSI_CTRL_NONE: + return false; + case VIRT_MSI_CTRL_ITS: + return true; + case VIRT_MSI_CTRL_GICV2M: + return false; + case VIRT_MSI_CTRL_AUTO: + if (whpx_enabled() && whpx_irqchip_in_kernel()) { + return false; + } + if (vms->gic_version =3D=3D VIRT_GIC_VERSION_2) { + return false; + } + return true; + default: + return false; } - if (vms->its =3D=3D ON_OFF_AUTO_AUTO) { - if (whpx_enabled()) { +} + +bool virt_is_gicv2m_enabled(VirtMachineState *vms) +{ + switch (vms->msi_controller) { + case VIRT_MSI_CTRL_NONE: return false; - } + default: + return !virt_is_its_enabled(vms); } - return true; } =20 -static void virt_get_its(Object *obj, Visitor *v, const char *name, - void *opaque, Error **errp) +static char *virt_get_msi(Object *obj, Error **errp) { VirtMachineState *vms =3D VIRT_MACHINE(obj); - OnOffAuto its =3D vms->its; + const char *val; =20 - visit_type_OnOffAuto(v, name, &its, errp); + switch (vms->msi_controller) { + case VIRT_MSI_CTRL_NONE: + val =3D "off"; + break; + case VIRT_MSI_CTRL_ITS: + val =3D "its"; + break; + case VIRT_MSI_CTRL_GICV2M: + val =3D "gicv2m"; + break; + default: + val =3D "auto"; + break; + } + return g_strdup(val); } =20 -static void virt_set_its(Object *obj, Visitor *v, const char *name, - void *opaque, Error **errp) +static void virt_set_msi(Object *obj, const char *value, Error **errp) { + ERRP_GUARD(); VirtMachineState *vms =3D VIRT_MACHINE(obj); =20 - visit_type_OnOffAuto(v, name, &vms->its, errp); + if (!strcmp(value, "auto")) { + vms->msi_controller =3D VIRT_MSI_CTRL_AUTO; /* Will be overriden l= ater */ + } else if (!strcmp(value, "its")) { + vms->msi_controller =3D VIRT_MSI_CTRL_ITS; + } else if (!strcmp(value, "gicv2m")) { + vms->msi_controller =3D VIRT_MSI_CTRL_GICV2M; + } else if (!strcmp(value, "none")) { + vms->msi_controller =3D VIRT_MSI_CTRL_NONE; + } else { + error_setg(errp, "Invalid msi value"); + error_append_hint(errp, "Valid values are auto, gicv2m, its, off\n= "); + } +} + +static bool virt_get_its(Object *obj, Error **errp) +{ + VirtMachineState *vms =3D VIRT_MACHINE(obj); + + return virt_is_its_enabled(vms); +} + +static void virt_set_its(Object *obj, bool value, Error **errp) +{ + VirtMachineState *vms =3D VIRT_MACHINE(obj); + + if (value) { + vms->msi_controller =3D VIRT_MSI_CTRL_ITS; + } else if (vms->no_gicv3_with_gicv2m) { + vms->msi_controller =3D VIRT_MSI_CTRL_NONE; + } else { + vms->msi_controller =3D VIRT_MSI_CTRL_GICV2M; + } } =20 static bool virt_get_dtb_randomness(Object *obj, Error **errp) @@ -3062,6 +3125,8 @@ static void virt_machine_device_pre_plug_cb(HotplugHa= ndler *hotplug_dev, db_start =3D base_memmap[VIRT_GIC_V2M].base; db_end =3D db_start + base_memmap[VIRT_GIC_V2M].size - 1; break; + case VIRT_MSI_CTRL_AUTO: + g_assert_not_reached(); } resv_prop_str =3D g_strdup_printf("0x%"PRIx64":0x%"PRIx64":%u", db_start, db_end, @@ -3452,13 +3517,18 @@ static void virt_machine_class_init(ObjectClass *oc= , const void *data) "guest CPU which implements the = ARM " "Memory Tagging Extension"); =20 - object_class_property_add(oc, "its", "OnOffAuto", - virt_get_its, virt_set_its, - NULL, NULL); + object_class_property_add_bool(oc, "its", virt_get_its, + virt_set_its); object_class_property_set_description(oc, "its", "Set on/off to enable/disable " "ITS instantiation"); =20 + object_class_property_add_str(oc, "msi", virt_get_msi, + virt_set_msi); + object_class_property_set_description(oc, "msi", + "Set MSI settings. " + "Valid values are auto/gicv2m/it= s/off"); + object_class_property_add_bool(oc, "dtb-randomness", virt_get_dtb_randomness, virt_set_dtb_randomness); @@ -3515,7 +3585,7 @@ static void virt_instance_init(Object *obj) vms->highmem_redists =3D true; =20 /* Default allows ITS instantiation if available */ - vms->its =3D ON_OFF_AUTO_AUTO; + vms->msi_controller =3D VIRT_MSI_CTRL_AUTO; /* Allow ITS emulation if the machine version supports it */ vms->tcg_its =3D !vmc->no_tcg_its; vms->no_gicv3_with_gicv2m =3D false; diff --git a/include/hw/arm/virt.h b/include/hw/arm/virt.h index 394b70c62e..ff43bcb739 100644 --- a/include/hw/arm/virt.h +++ b/include/hw/arm/virt.h @@ -101,6 +101,8 @@ typedef enum VirtIOMMUType { =20 typedef enum VirtMSIControllerType { VIRT_MSI_CTRL_NONE, + /* This value is overriden at runtime.*/ + VIRT_MSI_CTRL_AUTO, VIRT_MSI_CTRL_GICV2M, VIRT_MSI_CTRL_ITS, } VirtMSIControllerType; @@ -147,7 +149,6 @@ struct VirtMachineState { bool highmem_ecam; bool highmem_mmio; bool highmem_redists; - OnOffAuto its; bool tcg_its; bool virt; bool ras; @@ -217,5 +218,6 @@ static inline int virt_gicv3_redist_region_count(VirtMa= chineState *vms) } =20 bool virt_is_its_enabled(VirtMachineState *vms); +bool virt_is_gicv2m_enabled(VirtMachineState *vms); =20 #endif /* QEMU_ARM_VIRT_H */ --=20 2.50.1 (Apple Git-155)