diff options
| -rw-r--r-- | drivers/iommu/amd/init.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/iommu/amd/init.c b/drivers/iommu/amd/init.c index 46280e6e1535..1c7ae7d3c55d 100644 --- a/drivers/iommu/amd/init.c +++ b/drivers/iommu/amd/init.c @@ -1850,8 +1850,13 @@ static int __init iommu_init_pci(struct amd_iommu *iommu) if (ret) return ret; - if (iommu->cap & (1UL << IOMMU_CAP_NPCACHE)) + if (iommu->cap & (1UL << IOMMU_CAP_NPCACHE)) { + if (!amd_iommu_unmap_flush) + pr_info("IOMMU batching is disabled due to virtualization\n"); + amd_iommu_np_cache = true; + amd_iommu_unmap_flush = true; + } init_iommu_perf_ctr(iommu); |