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c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1747242364; 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=U2hJOopkHL89WP3TS0nXibSTG59lmqr3HcH+lleJvA4=; b=hWoayKL9WySpkHX0M36IWU9W6asBlGqK0g0ub7nf2kJQknZ9u4RXtbOrfehfVz8cz/4DNS 4q5AiafUjRhC3I0/A8Xl244CeATWL5O6OEXeeBcPM+u4f0/RDRVkGc69sPoe0Hx6n56m8Q vhfRnWhwoeccidKuL2tUJJ0WaXoYotc= X-MC-Unique: __JECyZ0M-yBUWIJ5w9h4A-1 X-Mimecast-MFC-AGG-ID: __JECyZ0M-yBUWIJ5w9h4A_1747242361 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, anisinha@redhat.com, mst@redhat.com, shannon.zhaosl@gmail.com Cc: pbonzini@redhat.com, Jonathan.Cameron@huawei.com, philmd@linaro.org Subject: [PATCH 16/22] hw/acpi/ged: Prepare the device to react to PCI hotplug events Date: Wed, 14 May 2025 19:01:03 +0200 Message-ID: <20250514170431.2786231-17-eric.auger@redhat.com> In-Reply-To: <20250514170431.2786231-1-eric.auger@redhat.com> References: <20250514170431.2786231-1-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" QEMU will notify the OS about PCI hotplug/hotunplug events through GED interrupts. Let the GED device handle a new PCI hotplug event. On its occurrence it calls the \\_SB.PCI0.PCNT method with the BLCK mutex held. The GED device uses a dedicated MMIO region that will be mapped by the machine code. At this point the GED still does not support PCI device hotplug in its TYPE_HOTPLUG_HANDLER implementation. This will come in a subsequent patch. Signed-off-by: Eric Auger --- include/hw/acpi/generic_event_device.h | 5 +++++ include/hw/acpi/pcihp.h | 2 ++ hw/acpi/generic_event_device.c | 15 +++++++++++++++ hw/acpi/pcihp.c | 1 - 4 files changed, 22 insertions(+), 1 deletion(-) diff --git a/include/hw/acpi/generic_event_device.h b/include/hw/acpi/gener= ic_event_device.h index d2dac87b4a..28be6c0582 100644 --- a/include/hw/acpi/generic_event_device.h +++ b/include/hw/acpi/generic_event_device.h @@ -63,6 +63,7 @@ #include "hw/acpi/memory_hotplug.h" #include "hw/acpi/ghes.h" #include "hw/acpi/cpu.h" +#include "hw/acpi/pcihp.h" #include "qom/object.h" =20 #define ACPI_POWER_BUTTON_DEVICE "PWRB" @@ -101,6 +102,7 @@ OBJECT_DECLARE_SIMPLE_TYPE(AcpiGedState, ACPI_GED) #define ACPI_GED_PWR_DOWN_EVT 0x2 #define ACPI_GED_NVDIMM_HOTPLUG_EVT 0x4 #define ACPI_GED_CPU_HOTPLUG_EVT 0x8 +#define ACPI_GED_PCI_HOTPLUG_EVT 0x10 =20 typedef struct GEDState { MemoryRegion evt; @@ -114,6 +116,9 @@ struct AcpiGedState { MemoryRegion container_memhp; CPUHotplugState cpuhp_state; MemoryRegion container_cpuhp; + AcpiPciHpState pcihp_state; + MemoryRegion container_pcihp; + GEDState ged_state; uint32_t ged_event_bitmap; qemu_irq irq; diff --git a/include/hw/acpi/pcihp.h b/include/hw/acpi/pcihp.h index bc31dbff39..bda5ea24b5 100644 --- a/include/hw/acpi/pcihp.h +++ b/include/hw/acpi/pcihp.h @@ -38,6 +38,8 @@ #define ACPI_PCIHP_SEJ_BASE 0x8 #define ACPI_PCIHP_BNMR_BASE 0x10 =20 +#define ACPI_PCIHP_SIZE 0x0018 + typedef struct AcpiPciHpPciStatus { uint32_t up; uint32_t down; diff --git a/hw/acpi/generic_event_device.c b/hw/acpi/generic_event_device.c index 7a62f8d5bc..dc3620553d 100644 --- a/hw/acpi/generic_event_device.c +++ b/hw/acpi/generic_event_device.c @@ -12,6 +12,7 @@ #include "qemu/osdep.h" #include "qapi/error.h" #include "hw/acpi/acpi.h" +#include "hw/acpi/pcihp.h" #include "hw/acpi/generic_event_device.h" #include "hw/irq.h" #include "hw/mem/pc-dimm.h" @@ -26,6 +27,7 @@ static const uint32_t ged_supported_events[] =3D { ACPI_GED_PWR_DOWN_EVT, ACPI_GED_NVDIMM_HOTPLUG_EVT, ACPI_GED_CPU_HOTPLUG_EVT, + ACPI_GED_PCI_HOTPLUG_EVT, }; =20 /* @@ -121,6 +123,12 @@ void build_ged_aml(Aml *table, const char *name, Hotpl= ugHandler *hotplug_dev, aml_notify(aml_name("\\_SB.NVDR"), aml_int(0x80))); break; + case ACPI_GED_PCI_HOTPLUG_EVT: + aml_append(if_ctx, + aml_acquire(aml_name("\\_SB.PCI0.BLCK"), 0xFFFF= )); + aml_append(if_ctx, aml_call0("\\_SB.PCI0.PCNT")); + aml_append(if_ctx, aml_release(aml_name("\\_SB.PCI0.BLCK")= )); + break; default: /* * Please make sure all the events in ged_supported_events= [] @@ -299,6 +307,8 @@ static void acpi_ged_send_event(AcpiDeviceIf *adev, Acp= iEventStatusBits ev) sel =3D ACPI_GED_NVDIMM_HOTPLUG_EVT; } else if (ev & ACPI_CPU_HOTPLUG_STATUS) { sel =3D ACPI_GED_CPU_HOTPLUG_EVT; + } else if (ev & ACPI_PCI_HOTPLUG_STATUS) { + sel =3D ACPI_GED_PCI_HOTPLUG_EVT; } else { /* Unknown event. Return without generating interrupt. */ warn_report("GED: Unsupported event %d. No irq injected", ev); @@ -428,6 +438,11 @@ static void acpi_ged_realize(DeviceState *dev, Error *= *errp) cpu_hotplug_hw_init(&s->container_cpuhp, OBJECT(dev), &s->cpuhp_state, 0); break; + case ACPI_GED_PCI_HOTPLUG_EVT: + memory_region_init(&s->container_pcihp, OBJECT(dev), + "pcihp container", + ACPI_PCIHP_SIZE); + sysbus_init_mmio(sbd, &s->container_pcihp); } ged_events--; } diff --git a/hw/acpi/pcihp.c b/hw/acpi/pcihp.c index 57fe8938b1..e87846a1fa 100644 --- a/hw/acpi/pcihp.c +++ b/hw/acpi/pcihp.c @@ -44,7 +44,6 @@ #include "qobject/qnum.h" #include "trace.h" =20 -#define ACPI_PCIHP_SIZE 0x0018 #define PCI_UP_BASE 0x0000 #define PCI_DOWN_BASE 0x0004 #define PCI_EJ_BASE 0x0008 --=20 2.49.0