ArmVirtPkg: Kvmtool: Advertise all serial ports

kvmtool advertises 4 serial ports. The DynamicTablesPkg advertises:
- the first port as the console port / SPCR table
- the second port as the debug port / DBG2 table
- the other ports are currently ignored

Advertise the last 2 serial port to the OS by describing them in SSDT
tables. New serial devices can be seen at:
Before patch:
$ ls /sys/devices/pnp0
00:00  00:01  00:02  power  uevent

After patch:
$ ls /sys/devices/pnp0
00:00  00:01  00:02  00:03  00:04  power  uevent

The EStdAcpiTableIdSsdtSerialPort entry is placed before the
last 3 PCI related tables as they might be dynamically removed
depending on kvmtool parameters.

Signed-off-by: Pierre Gondois <[email protected]>

Author: pierregondois

ArmVirtPkg/KvmtoolCfgMgrDxe/ConfigurationManager.c

@@ -106,6 +106,15 @@ EDKII_PLATFORM_REPOSITORY_INFO  mKvmtoolPlatRepositoryInfo = {
       NULL
     },
     //
+    // SSDT Serial Port Table
+    //
+    {
+      EFI_ACPI_6_3_SECONDARY_SYSTEM_DESCRIPTION_TABLE_SIGNATURE,
+      0, // Unused
+      CREATE_STD_ACPI_TABLE_GEN_ID (EStdAcpiTableIdSsdtSerialPort),
+      NULL
+    },
+    //
     // PCI MCFG Table
     //
     {

ArmVirtPkg/KvmtoolCfgMgrDxe/ConfigurationManager.h

@@ -63,7 +63,7 @@ typedef EFI_STATUS (*CM_OBJECT_HANDLER_PROC) (
 ///
 /// The number of ACPI tables to install
 ///
-#define PLAT_ACPI_TABLE_COUNT  10
+#define PLAT_ACPI_TABLE_COUNT  11
 
 ///
 /// A structure describing the platform configuration