Seach for virtio-mmio devices in the DSDT table,
register the devices found.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 src/hw/virtio-mmio.h |  1 +
 src/util.h           |  1 +
 src/hw/virtio-mmio.c | 20 ++++++++++++++++++++
 src/post.c           |  2 ++
 4 files changed, 24 insertions(+)

diff --git a/src/hw/virtio-mmio.h b/src/hw/virtio-mmio.h
index 5e24f692c1ae..349d744d9364 100644
--- a/src/hw/virtio-mmio.h
+++ b/src/hw/virtio-mmio.h
@@ -71,6 +71,7 @@ typedef struct virtio_mmio_cfg {
 } virtio_mmio_cfg;
 
 void virtio_mmio_register(u64 mmio);
+void virtio_mmio_acpi(void);
 void virtio_mmio_setup(void);
 void vp_init_mmio(struct vp_device *vp, void *mmio);
 
diff --git a/src/util.h b/src/util.h
index 8ee0370492b8..76e1bfcd9897 100644
--- a/src/util.h
+++ b/src/util.h
@@ -100,6 +100,7 @@ struct acpi_device *acpi_dsdt_find_string(struct acpi_device *prev, const char *
 struct acpi_device *acpi_dsdt_find_eisaid(struct acpi_device *prev, u16 eisaid);
 char *acpi_dsdt_name(struct acpi_device *dev);
 int acpi_dsdt_present_eisaid(u16 eisaid);
+void acpi_dsdt_virtio(void);
 int acpi_dsdt_find_io(struct acpi_device *dev, u64 *min, u64 *max);
 int acpi_dsdt_find_mem(struct acpi_device *dev, u64 *min, u64 *max);
 int acpi_dsdt_find_irq(struct acpi_device *dev, u64 *irq);
diff --git a/src/hw/virtio-mmio.c b/src/hw/virtio-mmio.c
index b205ec6ef6ae..78618ab49e44 100644
--- a/src/hw/virtio-mmio.c
+++ b/src/hw/virtio-mmio.c
@@ -3,6 +3,7 @@
 #include "output.h" // dprintf
 #include "stacks.h" // run_thread
 #include "string.h" // memset
+#include "util.h" // acpi_dsdt_*
 #include "virtio-pci.h"
 #include "virtio-blk.h"
 #include "virtio-scsi.h"
@@ -34,6 +35,25 @@ void virtio_mmio_register(u64 mmio)
     dprintf(1, "virtio-mmio: device list full\n");
 }
 
+void virtio_mmio_acpi(void)
+{
+    static const char *virtio_hid = "LNRO0005";
+    struct acpi_device *dev;
+    u64 mem, irq, unused;
+
+    for (dev = acpi_dsdt_find_string(NULL, virtio_hid);
+         dev != NULL;
+         dev = acpi_dsdt_find_string(dev, virtio_hid)) {
+        if (acpi_dsdt_find_mem(dev, &mem, &unused) < 0)
+            continue;
+        if (acpi_dsdt_find_irq(dev, &irq) < 0)
+            continue;
+        dprintf(1, "ACPI: virtio-mmio device %s at 0x%llx, irq %lld\n",
+                acpi_dsdt_name(dev), mem, irq);
+        virtio_mmio_register(mem);
+    }
+}
+
 void virtio_mmio_setup(void)
 {
     u32 magic, version, devid;
diff --git a/src/post.c b/src/post.c
index febdc0859764..c4ab5b814a00 100644
--- a/src/post.c
+++ b/src/post.c
@@ -17,6 +17,7 @@
 #include "hw/rtc.h" // rtc_write
 #include "hw/serialio.h" // serial_debug_preinit
 #include "hw/usb.h" // usb_setup
+#include "hw/virtio-mmio.h" // virtio_mmio_acpi
 #include "malloc.h" // malloc_init
 #include "memmap.h" // SYMBOL
 #include "output.h" // dprintf
@@ -150,6 +151,7 @@ platform_hardware_setup(void)
     coreboot_platform_setup();
 
     acpi_dsdt_parse();
+    virtio_mmio_acpi();
 
     // Setup timers and periodic clock interrupt
     timer_setup();
-- 
2.18.2
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