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a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1772529975; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=Mg3ThAafWCTqWSQBaZM61tCDkORhEPiGIip8dnlp6kk=; b=P1L5qZA5Uz8eXtDOnOQ+shEZxVJn4FLHG1B/Af732Evyh/o0xGgwzT746HGu/lfO3xOBZg qG5QNHQS1Man8SaplKoG8zp2SuQL/fQw0bBvTy2KswfS3+R7QgY9zrFOhFlagOexw+ljgQ XRC5EpfS2PLtkLp1pu3yIR+tystk5Ow= X-MC-Unique: eW7UQOz5PKywGtSaCtaheQ-1 X-Mimecast-MFC-AGG-ID: eW7UQOz5PKywGtSaCtaheQ_1772529969 From: Igor Mammedov To: qemu-devel@nongnu.org Cc: mst@redhat.com, anisinha@redhat.com, pbonzini@redhat.com, peter.maydell@linaro.org, shannon.zhaosl@gmail.com, philmd@linaro.org, zhao1.liu@intel.com, rad@semihalf.com, leif.lindholm@oss.qualcomm.com, qemu-arm@nongnu.org Subject: [PATCH v2 09/21] arm: virt: create sbsa_gwdt watchdog Date: Tue, 3 Mar 2026 10:25:20 +0100 Message-ID: <20260303092532.2410177-10-imammedo@redhat.com> In-Reply-To: <20260303092532.2410177-1-imammedo@redhat.com> References: <20260303092532.2410177-1-imammedo@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.4 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=170.10.133.124; envelope-from=imammedo@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: 27 X-Spam_score: 2.7 X-Spam_bar: ++ X-Spam_report: (2.7 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, 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_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_SBL_CSS=3.335, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.968, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.495, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: qemu development 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 @redhat.com) X-ZM-MESSAGEID: 1772530281515158500 Allow to use SBSA generic watchdog with virt machine type. (includes conditional generation of corresponding FDT and ACPI GTDT descriptors) Use '-device sbsa_gwdt' to command line to enable it. Tested with Fedora 43: FDT: -M virt,acpi=3Doff -device sbsa_gwdt ACPI: -M virt -device sbsa_gwdt Signed-off-by: Igor Mammedov --- hw/arm/Kconfig | 1 + hw/arm/virt-acpi-build.c | 33 +++++++++++++++++++++++++++++++-- hw/arm/virt.c | 2 ++ hw/core/sysbus-fdt.c | 32 ++++++++++++++++++++++++++++++++ hw/watchdog/sbsa_gwdt.c | 1 + 5 files changed, 67 insertions(+), 2 deletions(-) diff --git a/hw/arm/Kconfig b/hw/arm/Kconfig index c66c452737..1222efadd1 100644 --- a/hw/arm/Kconfig +++ b/hw/arm/Kconfig @@ -36,6 +36,7 @@ config ARM_VIRT select VIRTIO_MEM_SUPPORTED select ACPI_CXL select ACPI_HMAT + select WDT_SBSA =20 config CUBIEBOARD bool diff --git a/hw/arm/virt-acpi-build.c b/hw/arm/virt-acpi-build.c index 719d2f994e..9c14b1d4d5 100644 --- a/hw/arm/virt-acpi-build.c +++ b/hw/arm/virt-acpi-build.c @@ -64,6 +64,7 @@ #include "hw/virtio/virtio-acpi.h" #include "target/arm/cpu.h" #include "target/arm/multiprocessing.h" +#include "hw/watchdog/sbsa_gwdt.h" =20 #define ARM_SPI_BASE 32 =20 @@ -863,6 +864,8 @@ build_gtdt(GArray *table_data, BIOSLinker *linker, Virt= MachineState *vms) const uint32_t irqflags =3D 0; /* Interrupt is Level triggered */ AcpiTable table =3D { .sig =3D "GTDT", .rev =3D 3, .oem_id =3D vms->oe= m_id, .oem_table_id =3D vms->oem_table_id }; + uint32_t gtdt_start =3D table_data->len; + Object *wdt =3D object_resolve_type_unambiguous(TYPE_WDT_SBSA, NULL); =20 acpi_table_begin(&table, table_data); =20 @@ -893,10 +896,15 @@ build_gtdt(GArray *table_data, BIOSLinker *linker, Vi= rtMachineState *vms) build_append_int_noprefix(table_data, irqflags, 4); /* CntReadBase Physical address */ build_append_int_noprefix(table_data, 0xFFFFFFFFFFFFFFFF, 8); + /* Platform Timer Count */ - build_append_int_noprefix(table_data, 0, 4); + build_append_int_noprefix(table_data, wdt ? 1 : 0, 4); /* Platform Timer Offset */ - build_append_int_noprefix(table_data, 0, 4); + build_append_int_noprefix(table_data, + wdt ? (table_data->len - gtdt_start) + + 4 + 4 + 4 /* len of this & following 2 fields to skip */ + : 0, 4); + if (vms->ns_el2_virt_timer_irq) { /* Virtual EL2 Timer GSIV */ build_append_int_noprefix(table_data, ARCH_TIMER_NS_EL2_VIRT_IRQ, = 4); @@ -906,6 +914,27 @@ build_gtdt(GArray *table_data, BIOSLinker *linker, Vir= tMachineState *vms) build_append_int_noprefix(table_data, 0, 4); build_append_int_noprefix(table_data, 0, 4); } + + /* ACPI 6.5 spec: 5.2.25.2 ARM Generic Watchdog Structure (Table 5-124= ) */ + if (wdt) { + PlatformBusDevice *pbus =3D PLATFORM_BUS_DEVICE(vms->platform_bus_= dev); + SysBusDevice *sd =3D SYS_BUS_DEVICE(wdt); + hwaddr mmio_base =3D vms->memmap[VIRT_PLATFORM_BUS].base; + hwaddr rbase =3D mmio_base + platform_bus_get_mmio_addr(pbus, sd, = 0); + hwaddr cbase =3D mmio_base + platform_bus_get_mmio_addr(pbus, sd, = 1); + int irq =3D ARM_SPI_BASE + vms->irqmap[VIRT_PLATFORM_BUS] + + platform_bus_get_irqn(pbus, sd, 0); + + build_append_int_noprefix(table_data, 1 /* Type: Watchdog GT */, 1= ); + build_append_int_noprefix(table_data, 28 /* Length */, 2); + build_append_int_noprefix(table_data, 0, 1); /* Reserved */ + /* RefreshFrame Physical Address */ + build_append_int_noprefix(table_data, rbase, 8); + /* WatchdogControlFrame Physical Address */ + build_append_int_noprefix(table_data, cbase, 8); + build_append_int_noprefix(table_data, irq, 4); /* Watchdog Timer G= SIV */ + build_append_int_noprefix(table_data, 0, 4); /* Watchdog Timer Fla= gs */ + } acpi_table_end(linker, &table); } =20 diff --git a/hw/arm/virt.c b/hw/arm/virt.c index cab2e21e8a..a87991b591 100644 --- a/hw/arm/virt.c +++ b/hw/arm/virt.c @@ -95,6 +95,7 @@ #include "hw/cxl/cxl.h" #include "hw/cxl/cxl_host.h" #include "qemu/guest-random.h" +#include "hw/watchdog/sbsa_gwdt.h" =20 static GlobalProperty arm_virt_compat_defaults[] =3D { { TYPE_VIRTIO_IOMMU_PCI, "aw-bits", "48" }, @@ -3474,6 +3475,7 @@ static void virt_machine_class_init(ObjectClass *oc, = const void *data) machine_class_allow_dynamic_sysbus_dev(mc, TYPE_RAMFB_DEVICE); machine_class_allow_dynamic_sysbus_dev(mc, TYPE_UEFI_VARS_SYSBUS); machine_class_allow_dynamic_sysbus_dev(mc, TYPE_ARM_SMMUV3); + machine_class_allow_dynamic_sysbus_dev(mc, TYPE_WDT_SBSA); #ifdef CONFIG_TPM machine_class_allow_dynamic_sysbus_dev(mc, TYPE_TPM_TIS_SYSBUS); #endif diff --git a/hw/core/sysbus-fdt.c b/hw/core/sysbus-fdt.c index 89d0c46445..76aa1bc579 100644 --- a/hw/core/sysbus-fdt.c +++ b/hw/core/sysbus-fdt.c @@ -36,6 +36,7 @@ #include "hw/display/ramfb.h" #include "hw/uefi/var-service-api.h" #include "hw/arm/fdt.h" +#include "hw/watchdog/sbsa_gwdt.h" =20 /* * internal struct that contains the information to create dynamic @@ -118,6 +119,36 @@ static int add_uefi_vars_node(SysBusDevice *sbdev, voi= d *opaque) return 0; } =20 +static int add_sbsa_gwdt_node(SysBusDevice *sbdev, void *opaque) +{ + PlatformBusFDTData *data =3D opaque; + PlatformBusDevice *pbus =3D data->pbus; + const char *parent_node =3D data->pbus_node_name; + void *fdt =3D data->fdt; + uint64_t cbase, rbase; + char *nodename; + int irq; + + cbase =3D platform_bus_get_mmio_addr(pbus, sbdev, 1); /* control fram= e */ + rbase =3D platform_bus_get_mmio_addr(pbus, sbdev, 0); /* refresh fram= e */ + irq =3D platform_bus_get_irqn(pbus, sbdev, 0); + + nodename =3D g_strdup_printf("%s/watchdog@%" PRIx64, parent_node, cbas= e); + qemu_fdt_add_subnode(fdt, nodename); + + qemu_fdt_setprop_string(fdt, nodename, "compatible", "arm,sbsa-gwdt"); + qemu_fdt_setprop_cells(fdt, nodename, "reg", + cbase, SBSA_GWDT_CMMIO_SIZE, + rbase, SBSA_GWDT_RMMIO_SIZE); + qemu_fdt_setprop_cells(fdt, nodename, "interrupts", + GIC_FDT_IRQ_TYPE_SPI, data->irq_start + irq, + GIC_FDT_IRQ_FLAGS_LEVEL_HI); + qemu_fdt_setprop_cell(fdt, nodename, "timeout-sec", 30); + + g_free(nodename); + return 0; +} + static int no_fdt_node(SysBusDevice *sbdev, void *opaque) { return 0; @@ -140,6 +171,7 @@ static const BindingEntry bindings[] =3D { TYPE_BINDING(TYPE_ARM_SMMUV3, no_fdt_node), TYPE_BINDING(TYPE_RAMFB_DEVICE, no_fdt_node), TYPE_BINDING(TYPE_UEFI_VARS_SYSBUS, add_uefi_vars_node), + TYPE_BINDING(TYPE_WDT_SBSA, add_sbsa_gwdt_node), TYPE_BINDING("", NULL), /* last element */ }; =20 diff --git a/hw/watchdog/sbsa_gwdt.c b/hw/watchdog/sbsa_gwdt.c index acb970e8b3..c4dd8005b7 100644 --- a/hw/watchdog/sbsa_gwdt.c +++ b/hw/watchdog/sbsa_gwdt.c @@ -285,6 +285,7 @@ static void wdt_sbsa_gwdt_class_init(ObjectClass *klass= , const void *data) dc->realize =3D wdt_sbsa_gwdt_realize; device_class_set_legacy_reset(dc, wdt_sbsa_gwdt_reset); dc->hotpluggable =3D false; + dc->user_creatable =3D true; set_bit(DEVICE_CATEGORY_WATCHDOG, dc->categories); dc->vmsd =3D &vmstate_sbsa_gwdt; dc->desc =3D "SBSA-compliant generic watchdog device"; --=20 2.47.3