OvmfPkg/PlatformCI: Boot OVMF in SMP mode.

Increase the chance that CI finds bugs in MP changes.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
(cherry picked from commit f92a9dce10)

Reapplying, since the CI (Windows and Linux) use Qemu 8 now, which works
with SMP again.

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=4324

Signed-off-by: Oliver Steffen <osteffen@redhat.com>
[ardb: use single-threaded TCG for SMM]

OvmfPkg/PlatformCI/PlatformBuildLib.py

@@ -195,6 +195,7 @@ class PlatformBuilder( UefiBuilder, BuildSettingsManager):
         args  = "-debugcon stdio"                                           # write messages to stdio
         args += " -global isa-debugcon.iobase=0x402"                        # debug messages out thru virtual io port
         args += " -net none"                                                # turn off network
+        args += " -smp 4"
         args += f" -drive file=fat:rw:{VirtualDrive},format=raw,media=disk" # Mount disk with startup.nsh
 
         if (self.env.GetValue("QEMU_HEADLESS").upper() == "TRUE"):
@@ -202,6 +203,7 @@ class PlatformBuilder( UefiBuilder, BuildSettingsManager):
 
         if (self.env.GetBuildValue("SMM_REQUIRE") == "1"):
             args += " -machine q35,smm=on" #,accel=(tcg|kvm)"
+            args += " --accel tcg,thread=single"
             #args += " -m ..."
             args += " -global driver=cfi.pflash01,property=secure,value=on"
             args += " -drive if=pflash,format=raw,unit=0,file=" + os.path.join(OutputPath_FV, "OVMF_CODE.fd") + ",readonly=on"