Commit bfeaec7f authored Jul 20, 2019 by Lu Baolu Committed by Joerg Roedel Aug 09, 2019

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 <ashok.raj@intel.com>
Cc: Jacob Pan <jacob.jun.pan@linux.intel.com>
Cc: Kevin Tian <kevin.tian@intel.com>
Cc: Sai Praneeth <sai.praneeth.prakhya@intel.com>
Fixes: dd5142ca ("iommu/vt-d: Add debugfs support to show scalable mode DMAR table internals")
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>

parent 458b7c8e

drivers/iommu/intel-iommu-debugfs.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -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);

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