diff options
| author | Lu Baolu <[email protected]> | 2019-07-20 10:01:26 +0800 |
|---|---|---|
| committer | Joerg Roedel <[email protected]> | 2019-08-09 17:29:25 +0200 |
| commit | bfeaec7f7d2f6b09764a1b48e88e9ca3d5076419 (patch) | |
| tree | 217f85e58440fd35621d9c693cf2d977fa9e96f0 | |
| parent | 458b7c8e0dde12d140e3472b80919cbb9ae793f4 (diff) | |
iommu/vt-d: Correctly check format of page table in debugfs
PASID support and enable bit in the context entry isn't the right
indicator for the type of tables (legacy or scalable mode). Check
the DMA_RTADDR_SMT bit in the root context pointer instead.
Cc: Ashok Raj <[email protected]>
Cc: Jacob Pan <[email protected]>
Cc: Kevin Tian <[email protected]>
Cc: Sai Praneeth <[email protected]>
Fixes: dd5142ca5d24b ("iommu/vt-d: Add debugfs support to show scalable mode DMAR table internals")
Signed-off-by: Lu Baolu <[email protected]>
Signed-off-by: Joerg Roedel <[email protected]>
| -rw-r--r-- | drivers/iommu/intel-iommu-debugfs.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/iommu/intel-iommu-debugfs.c b/drivers/iommu/intel-iommu-debugfs.c index 2b25d9c59336..471f05d452e0 100644 --- a/drivers/iommu/intel-iommu-debugfs.c +++ b/drivers/iommu/intel-iommu-debugfs.c @@ -235,7 +235,7 @@ static void ctx_tbl_walk(struct seq_file *m, struct intel_iommu *iommu, u16 bus) tbl_wlk.ctx_entry = context; m->private = &tbl_wlk; - if (pasid_supported(iommu) && is_pasid_enabled(context)) { + if (dmar_readq(iommu->reg + DMAR_RTADDR_REG) & DMA_RTADDR_SMT) { pasid_dir_ptr = context->lo & VTD_PAGE_MASK; pasid_dir_size = get_pasid_dir_size(context); pasid_dir_walk(m, pasid_dir_ptr, pasid_dir_size); |