https://bugzilla.kernel.org/show_bug.cgi?id=204975 Bug ID: 204975 Summary: AMD-Vi: Command buffer timeout Product: Virtualization Version: unspecified Kernel Version: 4.19.75 Hardware: x86-64 OS: Linux Tree: Mainline Status: NEW Severity: blocking Priority: P1 Component: kvm Assignee: virtualization_kvm@xxxxxxxxxxxxxxxxxxxx Reporter: sss123next@xxxxxxx Regression: No Created attachment 285127 --> https://bugzilla.kernel.org/attachment.cgi?id=285127&action=edit dmesg fragment with error i have "ASRock X470 Gaming K4" motherboard, and using pci-passthrough for sometime already, working fine on bios version 1.90, had some troubles, but working overall, unfortunately i decided to update bios to latest versions (3.40, 3.50), and pci-passthrough stopped work at all, i guess problem rerlated to new "AMD AGESA Combo-AM4 1.0.0.3", a little searching over internet confirms what it's common problem across different boards, i do not know exactly is it amd bug, kvm, bug, or kernel bug, i have already reported problem to board manufacturer. in console i get something like "vfio: cannot power on device, stuck in D3" from qemu. also a lot of warnings in dmesg (see attachments). device still visible in lspci, but looks completely unresponsive. -- You are receiving this mail because: You are watching the assignee of the bug.
