[Bug 201753] AMD-Vi: Unable to write to IOMMU perf counter

bugzilla-daemon
2021-03-19T16:37:58Z

--- Comment #31 from Neil (ledufff@hotmail.com) ---
Hah. It's true, cold booted and IOMMU was implemented, but after the second
reboot, I got:

[ 0.857880] pci 0000:00:00.2: AMD-Vi: Unable to read/write to IOMMU perf
counter.

my system: linux 5.10.23-200.fc33.x86_64, thinkpad e495 / AMD Ryzen 3500u