Messages in this thread | | | Date | Mon, 1 Jun 2020 19:09:29 +0300 (MSK) | From | Alexander Monakov <> | Subject | Re: [PATCH] iommu/amd: Fix event counter availability check |
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> Instead of blindly moving the code around to a spot that would just work, > I am trying to understand what might be required here. In this case, > the init_device_table_dma()should not be needed. I suspect it's the IOMMU > invalidate all command that's also needed here. > > I'm also checking with the HW and BIOS team. Meanwhile, could you please give > the following change a try:
Yes, this also fixes the problem for me. Alexander
> > diff --git a/drivers/iommu/amd_iommu_init.c b/drivers/iommu/amd_iommu_init.c > index 5b81fd16f5fa..b07458cc1b0b 100644 > --- a/drivers/iommu/amd_iommu_init.c > +++ b/drivers/iommu/amd_iommu_init.c > @@ -1875,6 +1875,8 @@ static int __init amd_iommu_init_pci(void) > ret = iommu_init_pci(iommu); > if (ret) > break; > + iommu_flush_all_caches(iommu); > + init_iommu_perf_ctr(iommu); > } > > /*
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