new file mode 100644
@@ -0,0 +1,8 @@
+#ifndef HW_I386_MICROVM_DT_H
+#define HW_I386_MICROVM_DT_H
+
+#include "hw/i386/microvm.h"
+
+void dt_setup_microvm(MicrovmMachineState *mms);
+
+#endif
@@ -104,6 +104,10 @@ struct MicrovmMachineState {
Notifier machine_done;
Notifier powerdown_req;
struct GPEXConfig gpex;
+
+ /* device tree */
+ void *fdt;
+ uint32_t ioapic_phandle[2];
};
#define TYPE_MICROVM_MACHINE MACHINE_TYPE_NAME("microvm")
new file mode 100644
@@ -0,0 +1,341 @@
+/*
+ * microvm device tree support
+ *
+ * This generates an device tree for microvm and exports it via fw_cfg
+ * as "etc/fdt" to the firmware (edk2 specifically).
+ *
+ * The use case is to allow edk2 find the pcie ecam and the virtio
+ * devices, without adding an ACPI parser, reusing the fdt parser
+ * which is needed anyway for the arm platform.
+ *
+ * Note 1: The device tree is incomplete. CPUs and memory is missing
+ * for example, those can be detected using other fw_cfg files.
+ * Also pci ecam irq routing is not there, edk2 doesn't use
+ * interrupts.
+ *
+ * Note 2: This is for firmware only. OSes should use the more
+ * complete ACPI tables for hardware discovery.
+ *
+ * ----------------------------------------------------------------------
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2 or later, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+#include "qemu/osdep.h"
+#include "qemu/cutils.h"
+#include "sysemu/device_tree.h"
+#include "hw/char/serial.h"
+#include "hw/i386/fw_cfg.h"
+#include "hw/rtc/mc146818rtc.h"
+#include "hw/sysbus.h"
+#include "hw/virtio/virtio-mmio.h"
+#include "hw/usb/xhci.h"
+
+#include "microvm-dt.h"
+
+static bool debug;
+
+static void dt_add_microvm_irq(MicrovmMachineState *mms,
+ const char *nodename, uint32_t irq)
+{
+ int index = 0;
+
+ if (irq >= IO_APIC_SECONDARY_IRQBASE) {
+ irq -= IO_APIC_SECONDARY_IRQBASE;
+ index++;
+ }
+
+ qemu_fdt_setprop_cell(mms->fdt, nodename, "interrupt-parent",
+ mms->ioapic_phandle[index]);
+ qemu_fdt_setprop_cells(mms->fdt, nodename, "interrupts", irq, 0);
+}
+
+static void dt_add_virtio(MicrovmMachineState *mms, VirtIOMMIOProxy *mmio)
+{
+ SysBusDevice *dev = SYS_BUS_DEVICE(mmio);
+ VirtioBusState *mmio_virtio_bus = &mmio->bus;
+ BusState *mmio_bus = &mmio_virtio_bus->parent_obj;
+ char *nodename;
+
+ if (QTAILQ_EMPTY(&mmio_bus->children)) {
+ return;
+ }
+
+ hwaddr base = dev->mmio[0].addr;
+ hwaddr size = 512;
+ unsigned index = (base - VIRTIO_MMIO_BASE) / size;
+ uint32_t irq = mms->virtio_irq_base + index;
+
+ nodename = g_strdup_printf("/virtio_mmio@%" PRIx64, base);
+ qemu_fdt_add_subnode(mms->fdt, nodename);
+ qemu_fdt_setprop_string(mms->fdt, nodename, "compatible", "virtio,mmio");
+ qemu_fdt_setprop_sized_cells(mms->fdt, nodename, "reg", 2, base, 2, size);
+ qemu_fdt_setprop(mms->fdt, nodename, "dma-coherent", NULL, 0);
+ dt_add_microvm_irq(mms, nodename, irq);
+ g_free(nodename);
+}
+
+static void dt_add_xhci(MicrovmMachineState *mms)
+{
+ const char compat[] = "generic-xhci";
+ uint32_t irq = MICROVM_XHCI_IRQ;
+ hwaddr base = MICROVM_XHCI_BASE;
+ hwaddr size = XHCI_LEN_REGS;
+ char *nodename;
+
+ nodename = g_strdup_printf("/usb@%" PRIx64, base);
+ qemu_fdt_add_subnode(mms->fdt, nodename);
+ qemu_fdt_setprop(mms->fdt, nodename, "compatible", compat, sizeof(compat));
+ qemu_fdt_setprop_sized_cells(mms->fdt, nodename, "reg", 2, base, 2, size);
+ qemu_fdt_setprop(mms->fdt, nodename, "dma-coherent", NULL, 0);
+ dt_add_microvm_irq(mms, nodename, irq);
+ g_free(nodename);
+}
+
+static void dt_add_pcie(MicrovmMachineState *mms)
+{
+ hwaddr base = PCIE_MMIO_BASE;
+ int nr_pcie_buses;
+ char *nodename;
+
+ nodename = g_strdup_printf("/pcie@%" PRIx64, base);
+ qemu_fdt_add_subnode(mms->fdt, nodename);
+ qemu_fdt_setprop_string(mms->fdt, nodename,
+ "compatible", "pci-host-ecam-generic");
+ qemu_fdt_setprop_string(mms->fdt, nodename, "device_type", "pci");
+ qemu_fdt_setprop_cell(mms->fdt, nodename, "#address-cells", 3);
+ qemu_fdt_setprop_cell(mms->fdt, nodename, "#size-cells", 2);
+ qemu_fdt_setprop_cell(mms->fdt, nodename, "linux,pci-domain", 0);
+ qemu_fdt_setprop(mms->fdt, nodename, "dma-coherent", NULL, 0);
+
+ qemu_fdt_setprop_sized_cells(mms->fdt, nodename, "reg",
+ 2, PCIE_ECAM_BASE, 2, PCIE_ECAM_SIZE);
+ if (mms->gpex.mmio64.size) {
+ qemu_fdt_setprop_sized_cells(mms->fdt, nodename, "ranges",
+
+ 1, FDT_PCI_RANGE_MMIO,
+ 2, mms->gpex.mmio32.base,
+ 2, mms->gpex.mmio32.base,
+ 2, mms->gpex.mmio32.size,
+
+ 1, FDT_PCI_RANGE_MMIO_64BIT,
+ 2, mms->gpex.mmio64.base,
+ 2, mms->gpex.mmio64.base,
+ 2, mms->gpex.mmio64.size);
+ } else {
+ qemu_fdt_setprop_sized_cells(mms->fdt, nodename, "ranges",
+
+ 1, FDT_PCI_RANGE_MMIO,
+ 2, mms->gpex.mmio32.base,
+ 2, mms->gpex.mmio32.base,
+ 2, mms->gpex.mmio32.size);
+ }
+
+ nr_pcie_buses = PCIE_ECAM_SIZE / PCIE_MMCFG_SIZE_MIN;
+ qemu_fdt_setprop_cells(mms->fdt, nodename, "bus-range", 0,
+ nr_pcie_buses - 1);
+}
+
+static void dt_add_ioapic(MicrovmMachineState *mms, SysBusDevice *dev)
+{
+ hwaddr base = dev->mmio[0].addr;
+ char *nodename;
+ uint32_t ph;
+ int index;
+
+ switch (base) {
+ case IO_APIC_DEFAULT_ADDRESS:
+ index = 0;
+ break;
+ case IO_APIC_SECONDARY_ADDRESS:
+ index = 1;
+ break;
+ default:
+ fprintf(stderr, "unknown ioapic @ %" PRIx64 "\n", base);
+ return;
+ }
+
+ nodename = g_strdup_printf("/ioapic%d@%" PRIx64, index + 1, base);
+ qemu_fdt_add_subnode(mms->fdt, nodename);
+ qemu_fdt_setprop_string(mms->fdt, nodename,
+ "compatible", "intel,ce4100-ioapic");
+ qemu_fdt_setprop(mms->fdt, nodename, "interrupt-controller", NULL, 0);
+ qemu_fdt_setprop_cell(mms->fdt, nodename, "#interrupt-cells", 0x2);
+ qemu_fdt_setprop_cell(mms->fdt, nodename, "#address-cells", 0x2);
+ qemu_fdt_setprop_sized_cells(mms->fdt, nodename, "reg",
+ 2, base, 2, 0x1000);
+
+ ph = qemu_fdt_alloc_phandle(mms->fdt);
+ qemu_fdt_setprop_cell(mms->fdt, nodename, "phandle", ph);
+ qemu_fdt_setprop_cell(mms->fdt, nodename, "linux,phandle", ph);
+ mms->ioapic_phandle[index] = ph;
+
+ g_free(nodename);
+}
+
+static void dt_add_isa_serial(MicrovmMachineState *mms, ISADevice *dev)
+{
+ const char compat[] = "ns16550";
+ uint32_t irq = object_property_get_int(OBJECT(dev), "irq", NULL);
+ hwaddr base = object_property_get_int(OBJECT(dev), "iobase", NULL);
+ hwaddr size = 8;
+ char *nodename;
+
+ nodename = g_strdup_printf("/serial@%" PRIx64, base);
+ qemu_fdt_add_subnode(mms->fdt, nodename);
+ qemu_fdt_setprop(mms->fdt, nodename, "compatible", compat, sizeof(compat));
+ qemu_fdt_setprop_sized_cells(mms->fdt, nodename, "reg", 2, base, 2, size);
+ dt_add_microvm_irq(mms, nodename, irq);
+
+ if (base == 0x3f8 /* com1 */) {
+ qemu_fdt_setprop_string(mms->fdt, "/chosen", "stdout-path", nodename);
+ }
+
+ g_free(nodename);
+}
+
+static void dt_add_isa_rtc(MicrovmMachineState *mms, ISADevice *dev)
+{
+ const char compat[] = "motorola,mc146818";
+ uint32_t irq = RTC_ISA_IRQ;
+ hwaddr base = RTC_ISA_BASE;
+ hwaddr size = 8;
+ char *nodename;
+
+ nodename = g_strdup_printf("/rtc@%" PRIx64, base);
+ qemu_fdt_add_subnode(mms->fdt, nodename);
+ qemu_fdt_setprop(mms->fdt, nodename, "compatible", compat, sizeof(compat));
+ qemu_fdt_setprop_sized_cells(mms->fdt, nodename, "reg", 2, base, 2, size);
+ dt_add_microvm_irq(mms, nodename, irq);
+ g_free(nodename);
+}
+
+static void dt_setup_isa_bus(MicrovmMachineState *mms, DeviceState *bridge)
+{
+ BusState *bus = qdev_get_child_bus(bridge, "isa.0");
+ BusChild *kid;
+ Object *obj;
+
+ QTAILQ_FOREACH(kid, &bus->children, sibling) {
+ DeviceState *dev = kid->child;
+
+ /* serial */
+ obj = object_dynamic_cast(OBJECT(dev), TYPE_ISA_SERIAL);
+ if (obj) {
+ dt_add_isa_serial(mms, ISA_DEVICE(obj));
+ continue;
+ }
+
+ /* rtc */
+ obj = object_dynamic_cast(OBJECT(dev), TYPE_MC146818_RTC);
+ if (obj) {
+ dt_add_isa_rtc(mms, ISA_DEVICE(obj));
+ continue;
+ }
+
+ if (debug) {
+ fprintf(stderr, "%s: unhandled: %s\n", __func__,
+ object_get_typename(OBJECT(dev)));
+ }
+ }
+}
+
+static void dt_setup_sys_bus(MicrovmMachineState *mms)
+{
+ BusState *bus;
+ BusChild *kid;
+ Object *obj;
+
+ /* sysbus devices */
+ bus = sysbus_get_default();
+ QTAILQ_FOREACH(kid, &bus->children, sibling) {
+ DeviceState *dev = kid->child;
+
+ /* ioapic */
+ obj = object_dynamic_cast(OBJECT(dev), TYPE_IOAPIC);
+ if (obj) {
+ dt_add_ioapic(mms, SYS_BUS_DEVICE(obj));
+ continue;
+ }
+ }
+
+ QTAILQ_FOREACH(kid, &bus->children, sibling) {
+ DeviceState *dev = kid->child;
+
+ /* virtio */
+ obj = object_dynamic_cast(OBJECT(dev), TYPE_VIRTIO_MMIO);
+ if (obj) {
+ dt_add_virtio(mms, VIRTIO_MMIO(obj));
+ continue;
+ }
+
+ /* xhci */
+ obj = object_dynamic_cast(OBJECT(dev), TYPE_XHCI_SYSBUS);
+ if (obj) {
+ dt_add_xhci(mms);
+ continue;
+ }
+
+ /* pcie */
+ obj = object_dynamic_cast(OBJECT(dev), TYPE_GPEX_HOST);
+ if (obj) {
+ dt_add_pcie(mms);
+ continue;
+ }
+
+ /* isa */
+ obj = object_dynamic_cast(OBJECT(dev), "isabus-bridge");
+ if (obj) {
+ dt_setup_isa_bus(mms, DEVICE(obj));
+ continue;
+ }
+
+ if (debug) {
+ obj = object_dynamic_cast(OBJECT(dev), TYPE_IOAPIC);
+ if (obj) {
+ /* ioapic already added in first pass */
+ continue;
+ }
+ fprintf(stderr, "%s: unhandled: %s\n", __func__,
+ object_get_typename(OBJECT(dev)));
+ }
+ }
+}
+
+void dt_setup_microvm(MicrovmMachineState *mms)
+{
+ X86MachineState *x86ms = X86_MACHINE(mms);
+ int size = 0;
+
+ mms->fdt = create_device_tree(&size);
+
+ /* root node */
+ qemu_fdt_setprop_string(mms->fdt, "/", "compatible", "linux,microvm");
+ qemu_fdt_setprop_cell(mms->fdt, "/", "#address-cells", 0x2);
+ qemu_fdt_setprop_cell(mms->fdt, "/", "#size-cells", 0x2);
+
+ qemu_fdt_add_subnode(mms->fdt, "/chosen");
+ dt_setup_sys_bus(mms);
+
+ /* add to fw_cfg */
+ fprintf(stderr, "%s: add etc/fdt to fw_cfg\n", __func__);
+ fw_cfg_add_file(x86ms->fw_cfg, "etc/fdt", mms->fdt, size);
+
+ if (debug) {
+ fprintf(stderr, "%s: writing microvm.fdt\n", __func__);
+ g_file_set_contents("microvm.fdt", mms->fdt, size, NULL);
+ int ret = system("dtc -I dtb -O dts microvm.fdt");
+ if (ret != 0) {
+ fprintf(stderr, "%s: oops, dtc not installed?\n", __func__);
+ }
+ }
+}
@@ -28,6 +28,7 @@
#include "sysemu/reset.h"
#include "sysemu/runstate.h"
#include "acpi-microvm.h"
+#include "microvm-dt.h"
#include "hw/loader.h"
#include "hw/irq.h"
@@ -626,6 +627,7 @@ static void microvm_machine_done(Notifier *notifier, void *data)
machine_done);
acpi_setup_microvm(mms);
+ dt_setup_microvm(mms);
}
static void microvm_powerdown_req(Notifier *notifier, void *data)
@@ -575,7 +575,6 @@ build-without-default-features:
CONFIGURE_ARGS:
--without-default-features
--disable-capstone
- --disable-fdt
--disable-pie
--disable-qom-cast-debug
--disable-slirp
@@ -1,3 +1,4 @@
TARGET_ARCH=i386
TARGET_SUPPORTS_MTTCG=y
+TARGET_NEED_FDT=y
TARGET_XML_FILES= gdb-xml/i386-32bit.xml
@@ -1,4 +1,5 @@
TARGET_ARCH=x86_64
TARGET_BASE_ARCH=i386
TARGET_SUPPORTS_MTTCG=y
+TARGET_NEED_FDT=y
TARGET_XML_FILES= gdb-xml/i386-64bit.xml
@@ -11,7 +11,7 @@ i386_ss.add(when: 'CONFIG_X86_IOMMU', if_true: files('x86-iommu.c'),
if_false: files('x86-iommu-stub.c'))
i386_ss.add(when: 'CONFIG_AMD_IOMMU', if_true: files('amd_iommu.c'))
i386_ss.add(when: 'CONFIG_I440FX', if_true: files('pc_piix.c'))
-i386_ss.add(when: 'CONFIG_MICROVM', if_true: files('microvm.c', 'acpi-microvm.c'))
+i386_ss.add(when: 'CONFIG_MICROVM', if_true: files('microvm.c', 'acpi-microvm.c', 'microvm-dt.c'))
i386_ss.add(when: 'CONFIG_Q35', if_true: files('pc_q35.c'))
i386_ss.add(when: 'CONFIG_VMMOUSE', if_true: files('vmmouse.c'))
i386_ss.add(when: 'CONFIG_VMPORT', if_true: files('vmport.c'))
Allows edk2 detect virtio-mmio devices and pcie ecam. See comment in hw/i386/microvm-dt.c for more details. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> --- hw/i386/microvm-dt.h | 8 + include/hw/i386/microvm.h | 4 + hw/i386/microvm-dt.c | 341 +++++++++++++++++++++++++++++ hw/i386/microvm.c | 2 + .gitlab-ci.d/buildtest.yml | 1 - configs/targets/i386-softmmu.mak | 1 + configs/targets/x86_64-softmmu.mak | 1 + hw/i386/meson.build | 2 +- 8 files changed, 358 insertions(+), 2 deletions(-) create mode 100644 hw/i386/microvm-dt.h create mode 100644 hw/i386/microvm-dt.c