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| author | Gerd Hoffmann | 2020-09-15 14:08:57 +0200 |
|---|---|---|
| committer | Gerd Hoffmann | 2020-09-17 14:16:19 +0200 |
| commit | 3b98c65f75c016d317f70b8b47c86044d0260d53 (patch) | |
| tree | 25787d4d3e34705ded55eff71c12f5277717c612 /hw/i386/acpi-microvm.c | |
| parent | microvm/acpi: add minimal acpi support (diff) | |
| download | qemu-3b98c65f75c016d317f70b8b47c86044d0260d53.tar.gz qemu-3b98c65f75c016d317f70b8b47c86044d0260d53.tar.xz qemu-3b98c65f75c016d317f70b8b47c86044d0260d53.zip | |
microvm/acpi: add acpi_dsdt_add_virtio() for x86
Makes x86 linux kernel find virtio-mmio devices automatically.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Sergio Lopez <slp@redhat.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Message-id: 20200915120909.20838-10-kraxel@redhat.com
Diffstat (limited to 'hw/i386/acpi-microvm.c')
| -rw-r--r-- | hw/i386/acpi-microvm.c | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/hw/i386/acpi-microvm.c b/hw/i386/acpi-microvm.c index 06ef33949f..b9ce3768b2 100644 --- a/hw/i386/acpi-microvm.c +++ b/hw/i386/acpi-microvm.c @@ -21,6 +21,7 @@ */ #include "qemu/osdep.h" +#include "qemu/cutils.h" #include "qapi/error.h" #include "exec/memory.h" @@ -32,10 +33,60 @@ #include "hw/boards.h" #include "hw/i386/fw_cfg.h" #include "hw/i386/microvm.h" +#include "hw/virtio/virtio-mmio.h" #include "acpi-common.h" #include "acpi-microvm.h" +static void acpi_dsdt_add_virtio(Aml *scope, + MicrovmMachineState *mms) +{ + gchar *separator; + long int index; + BusState *bus; + BusChild *kid; + + bus = sysbus_get_default(); + QTAILQ_FOREACH(kid, &bus->children, sibling) { + DeviceState *dev = kid->child; + Object *obj = object_dynamic_cast(OBJECT(dev), TYPE_VIRTIO_MMIO); + + if (obj) { + VirtIOMMIOProxy *mmio = VIRTIO_MMIO(obj); + 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 = mms->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) @@ -60,6 +111,7 @@ build_dsdt_microvm(GArray *table_data, BIOSLinker *linker, build_ged_aml(sb_scope, GED_DEVICE, HOTPLUG_HANDLER(mms->acpi_dev), GED_MMIO_IRQ, AML_SYSTEM_MEMORY, GED_MMIO_BASE); acpi_dsdt_add_power_button(sb_scope); + acpi_dsdt_add_virtio(sb_scope, mms); aml_append(dsdt, sb_scope); /* ACPI 5.0: Table 7-209 System State Package */ |