VMSetError for ACPI tables < 64k

[vbox_manage]

Hello,

I am trying to use a custom ACPI table with my VM without success. VirtualBox fails to start the VM (rc=VERR_TOO_MUCH_DATA) stating my ACPI table is too large.

The size of the DSDT I'm using is 59552 bytes. According to VirtualBox, the maximum size is 64k (65536 bytes). The log file is attached, see line 568.

This seems to be a bug where the size of GCPhysCur is (somehow) greater than 0x10000. See line 2744 of DevACPI.cpp.

* To reproduce *

1. Create a VM

2. Check the size of your DSDT

   ls -l /sys/firmware/acpi/tables/ | grep DSDT
   

2. If less than 64k, go ahead and make a copy in your VM folder

   sudo cp /sys/firmware/acpi/tables/DSDT /home/josh/VirtualBox\ VMs/win7x64sb1/DSDT
   

3. Change ownership and group of DSDT file

   sudo chown josh:josh /home/josh/VirtualBox\ VMs/win7x64sb1/DSDT
   

4. Set extra data using VBoxManage

   VBoxManage setextradata win7x64sb1 VBoxInternal/Devices/acpi/0/Config/CustomTable /home/josh/VirtualBox\ VMs/win7x64sb1/DSDT
   

5. Start the VM. You should see the error.

[vbox_manage]

vbox log

[vbox_manage]

A copy of the DSDT I'm using

[Frank Mehnert]

The maximum size of 64KB applies to all ACPI tables together, not only the DSDT! This is a limitation of the code which need to be raised eventually.

[vbox_manage]

Thank you. Hopefully it will be raised soon.

[nsmfoo]

Hi,

This 5 year old issue is still an issue. Any plans to solve it? Because of this issue it's not only near impossible, but rather impossible to use the custom ACPI table from a modern computer

[nsmfoo]

Also the maximun size should be changed to reflect current sizes ..

[SirBecalo]

it is extremely an extremely frustrating issue spanning decades. please try to act? its unrealistic to expect such ACPI table sizes!