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Date: Wed, 29 Mar 2023 15:29:15 +0200
From: "Gerd Hoffmann" <kraxel@redhat.com>
To: "Xie, Yuanhao" <yuanhao.xie@intel.com>
Cc: "Dong, Guo" <guo.dong@intel.com>, "Ni, Ray" <ray.ni@intel.com>, 
	"Rhodes, Sean" <sean@starlabs.systems>, "Lu, James" <james.lu@intel.com>, "Guo, Gua" <gua.guo@intel.com>, 
	"devel@edk2.groups.io" <devel@edk2.groups.io>
Subject: Re: [edk2-devel] [PATCH 2/2] UefiCpuPkg: After reset, wake up APs by SIPI.
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References: <20230327031711.1575-1-yuanhao.xie@intel.com>
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On Wed, Mar 29, 2023 at 08:50:24AM +0000, Xie, Yuanhao wrote:
> Hi Gerd,
> 
> Could you please provide me more information, like where does it hang, ad what build and boot options you use

qemu-system-x86_64 -display none -accel kvm -smp 2 -M q35 \
	-bios Build/OvmfX64/DEBUG_GCC5/FV/OVMF.fd \
	-chardev stdio,id=fw -device isa-debugcon,iobase=0x402,chardev=fw

Last log lines are ...

	AP Loop Mode is 1
	AP Vector: non-16-bit = 7EA7000/447
	WakeupBufferStart = 9F000, WakeupBufferSize = 1000
	AP Vector: 16-bit = 9F000/39, ExchangeInfo = 9F039/A4
	CpuMpPei: 5-Level Paging = 0

... and here it hangs.

>     -p OvmfPkg/OvmfPkgIa32.dsc \

Using OvmfPkgX64.dsc here.  Tried using Ia32 instead, hangs too,
at the same place.

take care,
  Gerd