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c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1752003816; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=qykNbq9Z1KR/RSUyv3WPhqM899KG4p1hewVkFgNUlDM=; b=GrvM675LXS8/eN5XaIpT+VaT8OXhRtEyKhMAWtI8htDo11FMiCVId1CdiffPuXFV2ESSte naZao50NuWL64AwZiyx18Q6YluMTxOCt5Yq/91vGRC1FKJzMVJfWGGMFWsKM5CVaSueFSW Lq9cv9x81gUhRJZRe67ldvc1tANTjGk= X-MC-Unique: tQQP-uuHP0i5n10883s28w-1 X-Mimecast-MFC-AGG-ID: tQQP-uuHP0i5n10883s28w_1751984863 From: Eric Auger To: eric.auger.pro@gmail.com, eric.auger@redhat.com, qemu-devel@nongnu.org, qemu-arm@nongnu.org, peter.maydell@linaro.org, imammedo@redhat.com, Jonathan.Cameron@huawei.com, gustavo.romero@linaro.org, anisinha@redhat.com, mst@redhat.com, shannon.zhaosl@gmail.com Cc: pbonzini@redhat.com, philmd@linaro.org, alex.bennee@linaro.org Subject: [PATCH v6 27/36] hw/acpi/pcihp: Remove root arg in acpi_pcihp_init Date: Tue, 8 Jul 2025 16:23:09 +0200 Message-ID: <20250708142437.1344644-28-eric.auger@redhat.com> In-Reply-To: <20250708142437.1344644-1-eric.auger@redhat.com> References: <20250708142437.1344644-1-eric.auger@redhat.com> MIME-Version: 1.0 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; 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charset="utf-8" Let pass the root bus to ich9 and piix4 through a property link instead of through an argument passed to acpi_pcihp_init(). Also make sure the root bus is set at the entry of acpi_pcihp_init(). The rationale of that change is to be consistent with the forecoming ARM implementation where the machine passes the root bus (steming from GPEX) to the GED device through a link property. Signed-off-by: Eric Auger Suggested-by: Igor Mammedov Reviewed-by: Jonathan Cameron --- include/hw/acpi/pcihp.h | 2 +- hw/acpi/acpi-pci-hotplug-stub.c | 2 +- hw/acpi/ich9.c | 7 ++++++- hw/acpi/pcihp.c | 4 ++-- hw/acpi/piix4.c | 5 ++++- 5 files changed, 14 insertions(+), 6 deletions(-) diff --git a/include/hw/acpi/pcihp.h b/include/hw/acpi/pcihp.h index 9ff548650b..ca6a258825 100644 --- a/include/hw/acpi/pcihp.h +++ b/include/hw/acpi/pcihp.h @@ -62,7 +62,7 @@ typedef struct AcpiPciHpState { bool use_acpi_root_pci_hotplug; } AcpiPciHpState; =20 -void acpi_pcihp_init(Object *owner, AcpiPciHpState *, PCIBus *root, +void acpi_pcihp_init(Object *owner, AcpiPciHpState *, MemoryRegion *io, uint16_t io_base); =20 bool acpi_pcihp_is_hotpluggable_bus(AcpiPciHpState *s, BusState *bus); diff --git a/hw/acpi/acpi-pci-hotplug-stub.c b/hw/acpi/acpi-pci-hotplug-stu= b.c index b7bc6e40a1..d58ea726a8 100644 --- a/hw/acpi/acpi-pci-hotplug-stub.c +++ b/hw/acpi/acpi-pci-hotplug-stub.c @@ -4,7 +4,7 @@ =20 const VMStateDescription vmstate_acpi_pcihp_pci_status; =20 -void acpi_pcihp_init(Object *owner, AcpiPciHpState *s, PCIBus *root_bus, +void acpi_pcihp_init(Object *owner, AcpiPciHpState *s, MemoryRegion *address_space_io, uint16_t io_base) { } diff --git a/hw/acpi/ich9.c b/hw/acpi/ich9.c index 967b67485e..2b3b493c01 100644 --- a/hw/acpi/ich9.c +++ b/hw/acpi/ich9.c @@ -322,9 +322,10 @@ void ich9_pm_init(PCIDevice *lpc_pci, ICH9LPCPMRegs *p= m, qemu_irq sci_irq) } =20 if (pm->acpi_pci_hotplug.use_acpi_hotplug_bridge) { + object_property_set_link(OBJECT(lpc_pci), "bus", + OBJECT(pci_get_bus(lpc_pci)), &error_abor= t); acpi_pcihp_init(OBJECT(lpc_pci), &pm->acpi_pci_hotplug, - pci_get_bus(lpc_pci), pci_address_space_io(lpc_pci), ACPI_PCIHP_ADDR_ICH9); =20 @@ -428,6 +429,10 @@ void ich9_pm_add_properties(Object *obj, ICH9LPCPMRegs= *pm) =20 object_property_add_uint32_ptr(obj, ACPI_PM_PROP_PM_IO_BASE, &pm->pm_io_base, OBJ_PROP_FLAG_READ); + object_property_add_link(obj, "bus", TYPE_PCI_BUS, + (Object **)&pm->acpi_pci_hotplug.root, + object_property_allow_set_link, + OBJ_PROP_LINK_STRONG); object_property_add(obj, ACPI_PM_PROP_GPE0_BLK, "uint32", ich9_pm_get_gpe0_blk, NULL, NULL, pm); diff --git a/hw/acpi/pcihp.c b/hw/acpi/pcihp.c index f1594e664a..4922bbc778 100644 --- a/hw/acpi/pcihp.c +++ b/hw/acpi/pcihp.c @@ -493,13 +493,13 @@ static const MemoryRegionOps acpi_pcihp_io_ops =3D { }, }; =20 -void acpi_pcihp_init(Object *owner, AcpiPciHpState *s, PCIBus *root_bus, +void acpi_pcihp_init(Object *owner, AcpiPciHpState *s, MemoryRegion *io, uint16_t io_base) { s->io_len =3D ACPI_PCIHP_SIZE; s->io_base =3D io_base; =20 - s->root =3D root_bus; + assert(s->root); =20 memory_region_init_io(&s->io, owner, &acpi_pcihp_io_ops, s, "acpi-pci-hotplug", s->io_len); diff --git a/hw/acpi/piix4.c b/hw/acpi/piix4.c index d98b80df6d..7a18f18dda 100644 --- a/hw/acpi/piix4.c +++ b/hw/acpi/piix4.c @@ -567,7 +567,8 @@ static void piix4_acpi_system_hot_add_init(MemoryRegion= *parent, =20 if (s->acpi_pci_hotplug.use_acpi_hotplug_bridge || s->acpi_pci_hotplug.use_acpi_root_pci_hotplug) { - acpi_pcihp_init(OBJECT(s), &s->acpi_pci_hotplug, bus, parent, + object_property_set_link(OBJECT(s), "bus", OBJECT(bus), &error_abo= rt); + acpi_pcihp_init(OBJECT(s), &s->acpi_pci_hotplug, parent, ACPI_PCIHP_ADDR_PIIX4); qbus_set_hotplug_handler(BUS(pci_get_bus(PCI_DEVICE(s))), OBJECT(s= )); } @@ -611,6 +612,8 @@ static const Property piix4_pm_properties[] =3D { acpi_pci_hotplug.use_acpi_hotplug_bridge, true), DEFINE_PROP_BOOL(ACPI_PM_PROP_ACPI_PCI_ROOTHP, PIIX4PMState, acpi_pci_hotplug.use_acpi_root_pci_hotplug, true), + DEFINE_PROP_LINK("bus", PIIX4PMState, acpi_pci_hotplug.root, + TYPE_PCI_BUS, PCIBus *), DEFINE_PROP_BOOL("memory-hotplug-support", PIIX4PMState, acpi_memory_hotplug.is_enabled, true), DEFINE_PROP_BOOL("smm-compat", PIIX4PMState, smm_compat, false), --=20 2.49.0