[PATCH 12/13] microvm: make virtio irq base runtime configurable

[Gerd Hoffmann <kraxel@redhat.com>]

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 include/hw/i386/microvm.h |  2 +-
 hw/i386/acpi-build.c      |  6 +++---
 hw/i386/microvm.c         | 11 +++++++----
 3 files changed, 11 insertions(+), 8 deletions(-)

diff --git a/include/hw/i386/microvm.h b/include/hw/i386/microvm.h
index 53b2457db752..87828325ec32 100644
--- a/include/hw/i386/microvm.h
+++ b/include/hw/i386/microvm.h
@@ -28,7 +28,6 @@
 
 /* Platform virtio definitions */
 #define VIRTIO_MMIO_BASE      0xc0000000
-#define VIRTIO_IRQ_BASE       5
 #define VIRTIO_NUM_TRANSPORTS 8
 #define VIRTIO_CMDLINE_MAXLEN 64
 
@@ -61,6 +60,7 @@ typedef struct {
     ISADevice *rtc_state;
 
     /* Machine state */
+    uint32_t virtio_irq_base;
     bool kernel_cmdline_fixed;
     Notifier machine_done;
     AcpiDeviceIf *acpi_dev;
diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
index b765c31c80b0..9bddeb77704d 100644
--- a/hw/i386/acpi-build.c
+++ b/hw/i386/acpi-build.c
@@ -2755,7 +2755,7 @@ static bool acpi_get_mcfg(AcpiMcfgInfo *mcfg)
     return true;
 }
 
-static void acpi_dsdt_add_virtio(Aml *scope)
+static void acpi_dsdt_add_virtio(Aml *scope, MicrovmMachineState *mms)
 {
     gchar *separator;
     long int index;
@@ -2783,7 +2783,7 @@ static void acpi_dsdt_add_virtio(Aml *scope)
                 continue;
             }
 
-            uint32_t irq = VIRTIO_IRQ_BASE + index;
+            uint32_t irq = mms->virtio_irq_base + index;
             hwaddr base = VIRTIO_MMIO_BASE + index * 512;
             hwaddr size = 512;
 
@@ -2825,7 +2825,7 @@ build_dsdt_microvm(GArray *table_data, BIOSLinker *linker,
         aml_append(sb_scope, build_com_device_aml(1, false));
     }
     acpi_dsdt_add_fw_cfg(sb_scope, OBJECT(x86ms->fw_cfg));
-    acpi_dsdt_add_virtio(sb_scope);
+    acpi_dsdt_add_virtio(sb_scope, mms);
     aml_append(dsdt, sb_scope);
 
     scope = aml_scope("\\");
diff --git a/hw/i386/microvm.c b/hw/i386/microvm.c
index 748f9826fb0e..834b10aee0a2 100644
--- a/hw/i386/microvm.c
+++ b/hw/i386/microvm.c
@@ -122,10 +122,11 @@ static void microvm_devices_init(MicrovmMachineState *mms)
 
     kvmclock_create();
 
+    mms->virtio_irq_base = 8;
     for (i = 0; i < VIRTIO_NUM_TRANSPORTS; i++) {
         sysbus_create_simple("virtio-mmio",
                              VIRTIO_MMIO_BASE + i * 512,
-                             x86ms->gsi[VIRTIO_IRQ_BASE + i]);
+                             x86ms->gsi[mms->virtio_irq_base + i]);
     }
 
     /* Optional and legacy devices */
@@ -265,7 +266,7 @@ static void microvm_memory_init(MicrovmMachineState *mms)
     x86ms->ioapic_as = &address_space_memory;
 }
 
-static gchar *microvm_get_mmio_cmdline(gchar *name)
+static gchar *microvm_get_mmio_cmdline(gchar *name, uint32_t virtio_irq_base)
 {
     gchar *cmdline;
     gchar *separator;
@@ -285,7 +286,7 @@ static gchar *microvm_get_mmio_cmdline(gchar *name)
     ret = g_snprintf(cmdline, VIRTIO_CMDLINE_MAXLEN,
                      " virtio_mmio.device=512@0x%lx:%ld",
                      VIRTIO_MMIO_BASE + index * 512,
-                     VIRTIO_IRQ_BASE + index);
+                     virtio_irq_base + index);
     if (ret < 0 || ret >= VIRTIO_CMDLINE_MAXLEN) {
         g_free(cmdline);
         return NULL;
@@ -297,6 +298,7 @@ static gchar *microvm_get_mmio_cmdline(gchar *name)
 static void microvm_fix_kernel_cmdline(MachineState *machine)
 {
     X86MachineState *x86ms = X86_MACHINE(machine);
+    MicrovmMachineState *mms = MICROVM_MACHINE(machine);
     BusState *bus;
     BusChild *kid;
     char *cmdline;
@@ -320,7 +322,8 @@ static void microvm_fix_kernel_cmdline(MachineState *machine)
             BusState *mmio_bus = &mmio_virtio_bus->parent_obj;
 
             if (!QTAILQ_EMPTY(&mmio_bus->children)) {
-                gchar *mmio_cmdline = microvm_get_mmio_cmdline(mmio_bus->name);
+                gchar *mmio_cmdline = microvm_get_mmio_cmdline
+                    (mmio_bus->name, mms->virtio_irq_base);
                 if (mmio_cmdline) {
                     char *newcmd = g_strjoin(NULL, cmdline, mmio_cmdline, NULL);
                     g_free(mmio_cmdline);
-- 
2.18.2