ArmVirtPkg/PlatformCI: Add CI coverage for ArmVirtQemuKernel

ArmVirtQemuKernel.dsc describes a firmware build that is loadable at
arbitrary address and can be invoked using the Linux/arm64 kernel boot
protocol. The early code deviates significantly from ArmVirtQemu, and so
it makes sense to cover this platform in CI even if it is not widely
used. This ensures that the relocatable PrePi and other components in
EmbeddedPkg don't regress on ARM as they are being updated for use on
TDVF.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Acked-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Michael Kubacki <michael.kubacki@microsoft.com>

ArmVirtPkg/PlatformCI/.azurepipelines/Ubuntu-GCC5.yml

@@ -72,6 +72,49 @@ jobs:
             Run.Flags: $(run_flags)
             Run: $(should_run)
 
+          QEMU_KERNEL_AARCH64_DEBUG:
+            Build.File: "$(package)/PlatformCI/QemuKernelBuild.py"
+            Build.Arch: "AARCH64"
+            Build.Flags: ""
+            Build.Target: "DEBUG"
+            Run.Flags: $(run_flags)
+            Run: $(should_run)
+          QEMU_KERNEL_AARCH64_RELEASE:
+            Build.File: "$(package)/PlatformCI/QemuKernelBuild.py"
+            Build.Arch: "AARCH64"
+            Build.Flags: ""
+            Build.Target: "RELEASE"
+            Run.Flags: $(run_flags)
+            Run: $(should_run)
+          QEMU_KERNEL_AARCH64_NOOPT:
+            Build.File: "$(package)/PlatformCI/QemuKernelBuild.py"
+            Build.Arch: "AARCH64"
+            Build.Flags: ""
+            Build.Target: "NOOPT"
+            Run.Flags: $(run_flags)
+            Run: $(should_run)
+          QEMU_KERNEL_ARM_DEBUG:
+            Build.File: "$(package)/PlatformCI/QemuKernelBuild.py"
+            Build.Arch: "ARM"
+            Build.Flags: ""
+            Build.Target: "DEBUG"
+            Run.Flags: $(run_flags)
+            Run: $(should_run)
+          QEMU_KERNEL_ARM_RELEASE:
+            Build.File: "$(package)/PlatformCI/QemuKernelBuild.py"
+            Build.Arch: "ARM"
+            Build.Flags: ""
+            Build.Target: "RELEASE"
+            Run.Flags: $(run_flags)
+            Run: $(should_run)
+          QEMU_KERNEL_ARM_NOOPT:
+            Build.File: "$(package)/PlatformCI/QemuKernelBuild.py"
+            Build.Arch: "ARM"
+            Build.Flags: ""
+            Build.Target: "NOOPT"
+            Run.Flags: $(run_flags)
+            Run: $(should_run)
+
     workspace:
       clean: all
 

ArmVirtPkg/PlatformCI/PlatformBuildLib.py

@@ -226,13 +226,13 @@ class PlatformBuilder(UefiBuilder, BuildSettingsManager):
             args += " -cpu cortex-a57"                                          # emulate cpu
         elif(self.env.GetValue("TARGET_ARCH").upper() == "ARM"):
             cmd = "qemu-system-arm"
-            args = "-M virt"
+            args = "-M virt,highmem=off"
             args += " -cpu cortex-a15"                                          # emulate cpu
         else:
             raise NotImplementedError()
 
         # Common Args
-        args += " -pflash " + Built_FV                                     # path to fw
+        args += CommonPlatform.FvQemuArg + Built_FV                         # path to fw
         args += " -m 1024"                                                  # 1gb memory
         # turn off network
         args += " -net none"

ArmVirtPkg/PlatformCI/QemuBuild.py

@@ -27,5 +27,8 @@ class CommonPlatform():
 
     DscName = os.path.join("ArmVirtPkg", "ArmVirtQemu.dsc")
 
+    # this platform produces a bootable NOR flash image
+    FvQemuArg = " -pflash "
+
 import PlatformBuildLib
 PlatformBuildLib.CommonPlatform = CommonPlatform

ArmVirtPkg/PlatformCI/QemuKernelBuild.py

@@ -0,0 +1,35 @@
+# @file
+# Script to Build OVMF UEFI firmware
+#
+# Copyright (c) Microsoft Corporation.
+# SPDX-License-Identifier: BSD-2-Clause-Patent
+##
+import os
+import sys
+
+sys.path.append(os.path.dirname(os.path.abspath(__file__)))
+from PlatformBuildLib import SettingsManager
+from PlatformBuildLib import PlatformBuilder
+
+    # ####################################################################################### #
+    #                                Common Configuration                                     #
+    # ####################################################################################### #
+class CommonPlatform():
+    ''' Common settings for this platform.  Define static data here and use
+        for the different parts of stuart
+    '''
+    PackagesSupported = ("ArmVirtPkg",)
+    ArchSupported = ("AARCH64", "ARM")
+    TargetsSupported = ("DEBUG", "RELEASE", "NOOPT")
+    Scopes = ('armvirt', 'edk2-build')
+    WorkspaceRoot = os.path.realpath(os.path.join(
+        os.path.dirname(os.path.abspath(__file__)), "..", ".."))
+
+    DscName = os.path.join("ArmVirtPkg", "ArmVirtQemuKernel.dsc")
+
+    # this platform produces an executable image that is invoked using
+    # the Linux/arm64 kernel boot protocol
+    FvQemuArg = " -kernel "
+
+import PlatformBuildLib
+PlatformBuildLib.CommonPlatform = CommonPlatform