Change hidden CFG Lock setting

[andot]

https://www.tonymacx86.com/threads/successfully-patched-z170x-ud5-th-cfg-lock-msr-ex02.253466/page-2#post-1847437

GPD P2 Max:

0x285A1 	Form: View/Configure CPU Lock Options, FormId: 0x2738 {01 86 38 27 CC 01}
0x285A7 		One Of: CFG Lock, VarStoreInfo (VarOffset/VarName): 0x587, VarStore: 0x1, QuestionId: 0x154, Size: 1, Min: 0x0, Max 0x1, Step: 0x0 {05 91 9A 03 9B 03 54 01 01 00 87 05 10 10 00 01 00}
0x285B8 			One Of Option: Disabled, Value (8 bit): 0x0 {09 07 04 00 00 00 00}
0x285BF 			One Of Option: Enabled, Value (8 bit): 0x1 (default) {09 07 03 00 30 00 01}
0x285C6 		End One Of {29 02}
0x285C8 		One Of: Overclocking Lock, VarStoreInfo (VarOffset/VarName): 0x636, VarStore: 0x1, QuestionId: 0x155, Size: 1, Min: 0x0, Max 0x1, Step: 0x0 {05 91 96 03 97 03 55 01 01 00 36 06 10 10 00 01 00}
0x285D9 			One Of Option: Disabled, Value (8 bit): 0x0 (default) {09 07 04 00 30 00 00}
0x285E0 			One Of Option: Enabled, Value (8 bit): 0x1 {09 07 03 00 00 00 01}
0x285E7 		End One Of {29 02}
0x285E9 	End Form {29 02}

setup_var_3 0x587 0x00

[Azkali]

@andot Setting setup_var_3 0x587 0x00 does not update it in current bios, how did you manage to save it onto your bios ?

[andot]

1. Create a GUID partition map usbdisk.

2. Download and put Grub Shell on usb

• Download Grub Shell from grub-mod-setup_var
• Extract it into ~/Downloads folder
• Rename it from modGRUBShell.efi to bootx64.efi
• Copy bootx64.efi into USB disk

cd /Volumes/EFIBOOT
ls
mkdir -p /Volumes/EFIBOOT/EFI/BOOT
cp -iR ~/Downloads/bootx64.efi /Volumes/EFIBOOT/EFI/BOOT/bootx64.efi

3. boot with this usbdisk into grub.

4. run setup_var_3 0x587 0x00

5. run reboot to reboot your computer.

and then you will find CFG Lock is disabled.

MSR_PMG_CST_CONFIG_CONTROL........(0xE2) : 0x7E000008
------------------------------------------
 - I/O MWAIT Redirection Enable......... : 0 (not enabled)
 - CFG Lock............................. : 0 (MSR not locked)
 - C3 State Auto Demotion............... : 1 (enabled)
 - C1 State Auto Demotion............... : 1 (enabled)
 - C3 State Undemotion.................. : 1 (enabled)
 - C1 State Undemotion.................. : 1 (enabled)
 - Package C-State Auto Demotion........ : 1 (enabled)
 - Package C-State Undemotion........... : 1 (enabled)

After that. you can change the config.plist:

		<key>AppleIntelCPUPM</key>
		<true/>
		<key>AppleRTC</key>
		<true/>
		<key>KernelCpu</key>
		<false/>
		<key>KernelLapic</key>
		<false/>
		<key>KernelPm</key>
		<true/>

to be

		<key>AppleIntelCPUPM</key>
		<false/>
		<key>AppleRTC</key>
		<true/>
		<key>KernelCpu</key>
		<false/>
		<key>KernelLapic</key>
		<false/>
		<key>KernelPm</key>
		<false/>

to enable native power management.

[andot]

It can work on 0.24, 0.25 and 0.27 bios.

0.27 bios.txt
0.24 bios.txt

[Azkali]

Did exactly that but that doesn't seem to update anything, is it supposed to show new entries under BIOS ?
Edit: Never-mind I finally got it setup thanks, will add a section in the README with a big warning could you also update the chinese README ?

[Azkali]

Closing, will add a section inside README

[andot]

This is a hidden setting, we can't see it under BIOS.

[Azkali]

I manage to tweak DVMT allocation with my BIOS unlocked thanks to your guide and a user from the GPD Discord.

But I'm now missing the battery status did you encountered this issue ?
If so and you happen to have a solution, could you make a pull request to fix that, it would be greatly appreciated !

Do you have discord so we can discuss about this repository ?

[andot]

There is no problem of battery status of my GPD p2 Max.
My GPD p2 Max is Batch 2 | BIOS 0.25 MacOS 10.15.2