Makes x86 linux kernel find virtio-mmio devices automatically. Signed-off-by: Gerd Hoffmann <kra...@redhat.com> --- hw/i386/acpi-build.c | 51 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 51 insertions(+)
diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c index 0e45a646af56..80844db24d6b 100644 --- a/hw/i386/acpi-build.c +++ b/hw/i386/acpi-build.c @@ -21,6 +21,7 @@ */ #include "qemu/osdep.h" +#include "qemu/cutils.h" #include "qapi/error.h" #include "qapi/qmp/qnum.h" #include "acpi-build.h" @@ -60,6 +61,7 @@ #include "hw/pci-host/q35.h" #include "hw/i386/x86-iommu.h" #include "hw/i386/microvm.h" +#include "hw/virtio/virtio-mmio.h" #include "hw/acpi/aml-build.h" #include "hw/acpi/utils.h" @@ -2750,6 +2752,54 @@ static bool acpi_get_mcfg(AcpiMcfgInfo *mcfg) return true; } +static void acpi_dsdt_add_virtio(Aml *scope) +{ + gchar *separator; + long int index; + BusState *bus; + BusChild *kid; + + bus = sysbus_get_default(); + QTAILQ_FOREACH(kid, &bus->children, sibling) { + DeviceState *dev = kid->child; + ObjectClass *class = object_get_class(OBJECT(dev)); + + if (class == object_class_by_name(TYPE_VIRTIO_MMIO)) { + VirtIOMMIOProxy *mmio = VIRTIO_MMIO(OBJECT(dev)); + VirtioBusState *mmio_virtio_bus = &mmio->bus; + BusState *mmio_bus = &mmio_virtio_bus->parent_obj; + + if (QTAILQ_EMPTY(&mmio_bus->children)) { + continue; + } + separator = g_strrstr(mmio_bus->name, "."); + if (!separator) { + continue; + } + if (qemu_strtol(separator + 1, NULL, 10, &index) != 0) { + continue; + } + + uint32_t irq = VIRTIO_IRQ_BASE + index; + hwaddr base = VIRTIO_MMIO_BASE + index * 512; + hwaddr size = 512; + + Aml *dev = aml_device("VR%02u", (unsigned)index); + aml_append(dev, aml_name_decl("_HID", aml_string("LNRO0005"))); + aml_append(dev, aml_name_decl("_UID", aml_int(index))); + aml_append(dev, aml_name_decl("_CCA", aml_int(1))); + + Aml *crs = aml_resource_template(); + aml_append(crs, aml_memory32_fixed(base, size, AML_READ_WRITE)); + aml_append(crs, + aml_interrupt(AML_CONSUMER, AML_LEVEL, AML_ACTIVE_HIGH, + AML_EXCLUSIVE, &irq, 1)); + aml_append(dev, aml_name_decl("_CRS", crs)); + aml_append(scope, dev); + } + } +} + static void build_dsdt_microvm(GArray *table_data, BIOSLinker *linker, MicrovmMachineState *mms) @@ -2766,6 +2816,7 @@ build_dsdt_microvm(GArray *table_data, BIOSLinker *linker, sb_scope = aml_scope("_SB"); acpi_dsdt_add_fw_cfg(sb_scope, OBJECT(x86ms->fw_cfg)); + acpi_dsdt_add_virtio(sb_scope); aml_append(dsdt, sb_scope); scope = aml_scope("\\"); -- 2.18.2