[PATCH v3 05/10] microvm: add usb support

[Gerd Hoffmann <kraxel@redhat.com>]

Wire up "usb=on" machine option, when enabled add
a sysbus xhci controller with 8 ports.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 include/hw/i386/microvm.h |  5 ++++-
 hw/i386/acpi-microvm.c    |  9 +++++++++
 hw/i386/microvm.c         | 13 +++++++++++++
 hw/i386/Kconfig           |  1 +
 4 files changed, 27 insertions(+), 1 deletion(-)

diff --git a/include/hw/i386/microvm.h b/include/hw/i386/microvm.h
index 91b064575d55..0fc216007777 100644
--- a/include/hw/i386/microvm.h
+++ b/include/hw/i386/microvm.h
@@ -41,7 +41,7 @@
  *   7     |  parallel  |
  *   8     |  rtc       | rtc (rtc=on)
  *   9     |  acpi      | acpi (ged)
- *  10     |  pci lnk   |
+ *  10     |  pci lnk   | xhci (usb=on)
  *  11     |  pci lnk   |
  *  12     |  ps2       | pcie
  *  13     |  fpu       | pcie
@@ -60,6 +60,9 @@
 #define GED_MMIO_BASE_REGS    (GED_MMIO_BASE + 0x200)
 #define GED_MMIO_IRQ          9
 
+#define MICROVM_XHCI_BASE     0xfe900000
+#define MICROVM_XHCI_IRQ      10
+
 #define PCIE_MMIO_BASE        0xc0000000
 #define PCIE_MMIO_SIZE        0x20000000
 #define PCIE_ECAM_BASE        0xe0000000
diff --git a/hw/i386/acpi-microvm.c b/hw/i386/acpi-microvm.c
index f16f2311955c..7e8a6894ba26 100644
--- a/hw/i386/acpi-microvm.c
+++ b/hw/i386/acpi-microvm.c
@@ -35,6 +35,7 @@
 #include "hw/i386/microvm.h"
 #include "hw/pci/pci.h"
 #include "hw/pci/pcie_host.h"
+#include "hw/usb/xhci.h"
 #include "hw/virtio/virtio-mmio.h"
 
 #include "acpi-common.h"
@@ -89,6 +90,13 @@ static void acpi_dsdt_add_virtio(Aml *scope,
     }
 }
 
+static void acpi_dsdt_add_xhci(Aml *scope, MicrovmMachineState *mms)
+{
+    if (machine_usb(MACHINE(mms))) {
+        xhci_sysbus_build_aml(scope, MICROVM_XHCI_BASE, MICROVM_XHCI_IRQ);
+    }
+}
+
 static void acpi_dsdt_add_pci(Aml *scope, MicrovmMachineState *mms)
 {
     if (mms->pcie != ON_OFF_AUTO_ON) {
@@ -123,6 +131,7 @@ build_dsdt_microvm(GArray *table_data, BIOSLinker *linker,
                   GED_MMIO_IRQ, AML_SYSTEM_MEMORY, GED_MMIO_BASE);
     acpi_dsdt_add_power_button(sb_scope);
     acpi_dsdt_add_virtio(sb_scope, mms);
+    acpi_dsdt_add_xhci(sb_scope, mms);
     acpi_dsdt_add_pci(sb_scope, mms);
     aml_append(dsdt, sb_scope);
 
diff --git a/hw/i386/microvm.c b/hw/i386/microvm.c
index 68a7f424acf9..6672cfa254ee 100644
--- a/hw/i386/microvm.c
+++ b/hw/i386/microvm.c
@@ -47,6 +47,7 @@
 #include "hw/acpi/acpi.h"
 #include "hw/acpi/generic_event_device.h"
 #include "hw/pci-host/gpex.h"
+#include "hw/usb/xhci.h"
 
 #include "cpu.h"
 #include "elf.h"
@@ -197,6 +198,18 @@ static void microvm_devices_init(MicrovmMachineState *mms)
         x86ms->acpi_dev = HOTPLUG_HANDLER(dev);
     }
 
+    if (x86_machine_is_acpi_enabled(x86ms) && machine_usb(MACHINE(mms))) {
+        DeviceState *dev = qdev_new(TYPE_XHCI_SYSBUS);
+        qdev_prop_set_uint32(dev, "intrs", 1);
+        qdev_prop_set_uint32(dev, "slots", XHCI_MAXSLOTS);
+        qdev_prop_set_uint32(dev, "p2", 8);
+        qdev_prop_set_uint32(dev, "p3", 8);
+        sysbus_realize(SYS_BUS_DEVICE(dev), &error_fatal);
+        sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, MICROVM_XHCI_BASE);
+        sysbus_connect_irq(SYS_BUS_DEVICE(dev), 0,
+                           x86ms->gsi[MICROVM_XHCI_IRQ]);
+    }
+
     if (x86_machine_is_acpi_enabled(x86ms) && mms->pcie == ON_OFF_AUTO_ON) {
         /* use topmost 25% of the address space available */
         hwaddr phys_size = (hwaddr)1 << X86_CPU(first_cpu)->phys_bits;
diff --git a/hw/i386/Kconfig b/hw/i386/Kconfig
index 32aa15533bd8..eea059ffef54 100644
--- a/hw/i386/Kconfig
+++ b/hw/i386/Kconfig
@@ -105,6 +105,7 @@ config MICROVM
     select VIRTIO_MMIO
     select ACPI_HW_REDUCED
     select PCI_EXPRESS_GENERIC_BRIDGE
+    select USB_XHCI_SYSBUS
 
 config X86_IOMMU
     bool
-- 
2.27.0