Change to a WhiskyLake Platform, still have these issues.
I enabled the serial port of the WHL, got some debug messages of ACRN when launch sos and uos.
1. at acrn startup, the uart output:
[11007973us][cpu=0][vm0:vcpu0][sev=2][seq=37]:vpci_write_cfg 0:1c.1 not found! off: 0xdb, val: 0xbf
[11018799us][cpu=0][vm0:vcpu0][sev=2][seq=38]:vpci_write_cfg 0:1c.2 not found! off: 0xdb, val: 0xbf
[11029675us][cpu=0][vm0:vcpu0][sev=2][seq=39]:vpci_write_cfg 0:1c.3 not found! off: 0xdb, val: 0xbf
......

Hi all,
    I build a Ubuntu18.04 SOS on our 7300U board.  SCENARIO = industry
$ uname -a
Linux acrn-Kabylake 5.4.72-PKT-200203T060100Z #2 SMP PREEMPT Mon Mar 8 10:59:26 CST 2021 x86_64 x86_64 x86_64 GNU/Linux
$ dmesg | grep ACRN
[    0.000000] Hypervisor detected: ACRN
[   65.293721] ACRNTrace: Initialized acrn trace module with 4 cpu
[   65.293722] ACRN HVLog: no fixed memory reserve for hvlog.
$ acrn-dm -v
DM version is: 2.3-b6e24ea4-dirty (daily tag:acrn-2020w48.5-180000p), build by acrn@2021-03-08 10:28:57

There are some issues when launch UOS:
issue1: The SOS freezes for 60s at startup after the i915.enable_gvt=1 added in 40_customer.

the dmesg file is in attachment.

issue2: launch Debian as UOS,  warning messages(as follows) keep printing but the UOS works fine.
Failed to emulate instruction [mmio address 0xdf57e000, size 4Unhandled memory access to 0xdf57e004
Failed to emulate instruction [mmio address 0xdf57e004, size 4Unhandled memory access to 0xdf57e008
Failed to emulate instruction [mmio address 0xdf57e008, size 4Unhandled memory access to 0xdf57e00c
....

issue3: follow the latest document to using_windows_as_uos,  Enable the GVT-d GOP Driver.
The board often restarts after running the install_win.sh script. 
have tried 10 times, see UEFI shell only twice, and the rest are restarted directly.
finished the windows installation by GVT-d, but never launch WaaG successfully
because the board always restart when running launch_win.sh

the attachment is the tar of the dmesg files and scripts.
Any information, or thoughts would be greatly appreciated.

Thanks and Best Regards,
ZhangShuai

-- 
Xi'an R&D Center Computerized Numerical Control R&D Dept.  Shuai Zhang 
Tel : 029-84503040-8360  
E-mail :  zhangshuai@...     Web :  www.jingdiao.com