Maybe we can get the some useful info from IV entry. Regards, Jerry (Junwei Zhang) Linux Base Graphics SRDC Software Development _____________________________________ > -----Original Message----- > From: amd-gfx [mailto:amd-gfx-bounces at lists.freedesktop.org] On Behalf Of > Pixel Ding > Sent: Tuesday, February 07, 2017 13:49 > To: Zhou, David(ChunMing); Koenig, Christian > Cc: Ding, Pixel; amd-gfx at lists.freedesktop.org > Subject: [PATCH] drm/amdgpu/virt: skip VM fault handler for VF > > VF uses KIQ to access registers. When VM fault occurs, the driver can't get back > the fence of KIQ submission and runs into CPU soft lockup. > > Signed-off-by: Pixel Ding <Pixel.Ding at amd.com> > --- > drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c | 5 +++++ > 1 file changed, 5 insertions(+) > > diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c > b/drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c > index 7669b32..ff4fb37 100644 > --- a/drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c > +++ b/drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c > @@ -1237,6 +1237,11 @@ static int gmc_v8_0_process_interrupt(struct > amdgpu_device *adev, { > u32 addr, status, mc_client; > > + if (amdgpu_sriov_vf(adev)) { > + dev_err(adev->dev, "GPU fault detected on VF, can't access VM > registers\n"); > + return 0; > + } > + > addr = RREG32(mmVM_CONTEXT1_PROTECTION_FAULT_ADDR); > status = RREG32(mmVM_CONTEXT1_PROTECTION_FAULT_STATUS); > mc_client = > RREG32(mmVM_CONTEXT1_PROTECTION_FAULT_MCCLIENT); > -- > 2.7.4 > > _______________________________________________ > amd-gfx mailing list > amd-gfx at lists.freedesktop.org > https://lists.freedesktop.org/mailman/listinfo/amd-gfx
