diff options
Diffstat (limited to 'drivers/iommu/dmar.c')
| -rw-r--r-- | drivers/iommu/dmar.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/drivers/iommu/dmar.c b/drivers/iommu/dmar.c index 97b2e21ac46a..cf065df9bb18 100644 --- a/drivers/iommu/dmar.c +++ b/drivers/iommu/dmar.c @@ -582,7 +582,7 @@ int alloc_iommu(struct dmar_drhd_unit *drhd) { struct intel_iommu *iommu; int map_size; - u32 ver; + u32 ver, sts; static int iommu_allocated = 0; int agaw = 0; int msagaw = 0; @@ -652,6 +652,15 @@ int alloc_iommu(struct dmar_drhd_unit *drhd) (unsigned long long)iommu->cap, (unsigned long long)iommu->ecap); + /* Reflect status in gcmd */ + sts = readl(iommu->reg + DMAR_GSTS_REG); + if (sts & DMA_GSTS_IRES) + iommu->gcmd |= DMA_GCMD_IRE; + if (sts & DMA_GSTS_TES) + iommu->gcmd |= DMA_GCMD_TE; + if (sts & DMA_GSTS_QIES) + iommu->gcmd |= DMA_GCMD_QIE; + raw_spin_lock_init(&iommu->register_lock); drhd->iommu = iommu; |