[PATCH 5/8] hw/arm/virt: add pvpanic device in virt acpi table

[Mihai Carabas <mihai.carabas@oracle.com>]

From: Peng Hao <peng.hao2@zte.com.cn>

Add pvpanic device in virt acpi table, so when kernel command line
uses acpi=force, kernel can get info from acpi table.

Reviewed-by: Andrew Jones <drjones@redhat.com>
Signed-off-by: Peng Hao <peng.hao2@zte.com.cn>
Signed-off-by: Mihai Carabas <mihai.carabas@oracle.com>
---
 hw/arm/virt-acpi-build.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/hw/arm/virt-acpi-build.c b/hw/arm/virt-acpi-build.c
index 9747a64..f64bf89 100644
--- a/hw/arm/virt-acpi-build.c
+++ b/hw/arm/virt-acpi-build.c
@@ -87,6 +87,20 @@ static void acpi_dsdt_add_uart(Aml *scope, const MemMapEntry *uart_memmap,
     aml_append(scope, dev);
 }
 
+static void acpi_dsdt_add_pvpanic(Aml *scope, const MemMapEntry *pvpanic_memmap)
+{
+    Aml *dev = aml_device("PEVT");
+    aml_append(dev, aml_name_decl("_HID", aml_string("QEMU0001")));
+    aml_append(dev, aml_name_decl("_UID", aml_int(0)));
+
+    Aml *crs = aml_resource_template();
+    aml_append(crs, aml_memory32_fixed(pvpanic_memmap->base,
+               pvpanic_memmap->size, AML_READ_WRITE));
+
+    aml_append(dev, aml_name_decl("_CRS", crs));
+    aml_append(scope, dev);
+}
+
 static void acpi_dsdt_add_fw_cfg(Aml *scope, const MemMapEntry *fw_cfg_memmap)
 {
     Aml *dev = aml_device("FWCF");
@@ -605,6 +619,9 @@ build_dsdt(GArray *table_data, BIOSLinker *linker, VirtMachineState *vms)
     if (vmc->acpi_expose_flash) {
         acpi_dsdt_add_flash(scope, &memmap[VIRT_FLASH]);
     }
+    if (vms->pvpanic) {
+        acpi_dsdt_add_pvpanic(scope, &memmap[VIRT_PVPANIC]);
+    }
     acpi_dsdt_add_fw_cfg(scope, &memmap[VIRT_FW_CFG]);
     acpi_dsdt_add_virtio(scope, &memmap[VIRT_MMIO],
                     (irqmap[VIRT_MMIO] + ARM_SPI_BASE), NUM_VIRTIO_TRANSPORTS);
-- 
1.8.3.1