On 2021.04.12 19:23:47 -0600, Alex Williamson wrote: > On Mon, 12 Apr 2021 10:32:14 -0600 > Alex Williamson <alex.williamson@xxxxxxxxxx> wrote: > > > Running a Windows guest on a i915-GVTg_V4_2 from an HD 5500 IGD on > > v5.12-rc6 results in host logs: > > > > gvt: vgpu 1: lrm access to register (20c0) > > gvt: vgpu 1: MI_LOAD_REGISTER_MEM handler error > > gvt: vgpu 1: cmd parser error > > 0x0 > > 0x29 > > > > gvt: vgpu 1: scan wa ctx error > > gvt: vgpu 1: failed to submit desc 0 > > gvt: vgpu 1: fail submit workload on ring rcs0 > > gvt: vgpu 1: fail to emulate MMIO write 00002230 len 4 > > > > The guest goes into a boot loop triggering this error before reaching > > the desktop and rebooting. Guest using Intel driver 20.19.15.5171 > > dated 11/4/2020 (from driver file 15.40.5171). > > > > This VM works well with the same guest and userspace software stack on > > Fedora's kernel 5.11.11-200.fc33.x86_64. Thanks, > > Bisected to: Looks we didn't hit this one on Broadwell with recent testing. I'll double check, maybe Broadwell missed something after our cmd parser rework. Thanks for reporting! > > commit f18d417a57438498e0de481d3a0bc900c2b0e057 > Author: Yan Zhao <yan.y.zhao@xxxxxxxxx> > Date: Wed Dec 23 11:45:08 2020 +0800 > > drm/i915/gvt: filter cmds "srm" and "lrm" in cmd_handler > > do not allow "srm" and "lrm" except for GEN8_L3SQCREG4 and 0x21f0. > > Cc: Colin Xu <colin.xu@xxxxxxxxx> > Cc: Kevin Tian <kevin.tian@xxxxxxxxx> > Signed-off-by: Yan Zhao <yan.y.zhao@xxxxxxxxx> > Signed-off-by: Zhenyu Wang <zhenyuw@xxxxxxxxxxxxxxx> > Link: http://patchwork.freedesktop.org/patch/msgid/20201223034508.17031-1-yan.y.zhao@xxxxxxxxx > Reviewed-by: Zhenyu Wang <zhenyuw@xxxxxxxxxxxxxxx> >
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