When the GPU gets released, the guest driver halts the GPU's SMU.
On subsequent reset events, this module attempts a BACO reset
which requires a responsive SMU to enter BACO state.
With the SMU halted, PPSMC_MSG_EnterBaco times out and the BACO reset fails,
leaving the GPU in an unusable state until the host is rebooted.
Add a PSP (Platform Security Processor) Mode 1 Reset path for
Vega10.
This work the same way as this amdgpu kernel driver patch:
https://lists.freedesktop.org/archives/amd-gfx/2017-September/013203.html
and its inspired from the already implemented mode1 reset for Vega20.
Mode 1 Reset sends a hardware reset command (GFX_CTRL_CMD_ID_MODE1_RST)
directly to the PSP via the MP0_SMN_C2PMSG_64 mailbox register,
bypassing the unresponsive SMU entirely.
The Mode 1 Reset is attempted first in the reset sequence.
The existing BACO path is used as a fallback.
Tested on
AMD Radeon RX Vega 56 (device 0x687f)
Proxmox VE 9.2.2
kernel 7.0.2-6-pve
Confirmed that VMs can be started, stopped, and restarted repeatedly without
requiring a host reboot.
oberdfrandGeoffrey McRae