Hi,
On 12/06/2017 11:43 AM, Sohil Mehta wrote:
> From: Gayatri Kammela <gayatri.kamm...@intel.com>
>
> Debugfs extension to dump internals such as extended context table
> entries for each IOMMU to the userspace.
>
> root@OTC-KBLH-01:~# cat
> /sys/kernel/debug/intel_iommu/dmar_translation_struct
>
> IOMMU dmar1: Extended Root Table Addr:4558a1800
> Extended Root tbl entries:
> Bus 0 L: 4558a6001 H: 0
> Lower Context table entries for Bus: 0
> [entry] DID :B :D .F Low High
> [16] 0000:00:02.00 4558a5005 102
> Higher Context tbl entries for Bus: 0
> [16] 0000:00:02.00 401b0000c 401400000
>
> IOMMU dmar0: Extended Root Table Addr:4558a2800
> Extended Root tbl entries:
> Bus 0 L: 4016f4001 H: 0
> Lower Context table entries for Bus: 0
> [entry] DID :B :D .F Low High
> [80] 0000:00:0a.00 4016f3a05 102
> Higher Context tbl entries for Bus: 0
Do you mind changing "tbl entries" to "table entries" so that
it could be consistent with above lower one?
Best regards,
Lu Baolu
> [80] 0000:00:0a.00 40150000c 671b80000000
>
> Cc: Sohil Mehta <sohil.me...@intel.com>
> Cc: Fenghua Yu <fenghua...@intel.com>
> Cc: Jacob Pan <jacob.jun....@linux.intel.com>
> Cc: Ashok Raj <ashok....@intel.com>
> Signed-off-by: Gayatri Kammela <gayatri.kamm...@intel.com>
> ---
>
> v3: No change
>
> v2: No change
>
> drivers/iommu/intel-iommu-debug.c | 35 +++++++++++++++++++++++++++++++++++
> 1 file changed, 35 insertions(+)
>
> diff --git a/drivers/iommu/intel-iommu-debug.c
> b/drivers/iommu/intel-iommu-debug.c
> index 8ae0c4d..8e7f5d2 100644
> --- a/drivers/iommu/intel-iommu-debug.c
> +++ b/drivers/iommu/intel-iommu-debug.c
> @@ -46,6 +46,38 @@ static const struct file_operations __name ## _fops =
> \
> .owner = THIS_MODULE, \
> }
>
> +#ifdef CONFIG_INTEL_IOMMU_SVM
> +static void ext_ctx_tbl_entry_show(struct seq_file *m, void *unused,
> + struct intel_iommu *iommu, int bus, int ctx,
> + struct context_entry *context, bool new_ext)
> +{
> + u64 ctx_lo;
> +
> + if (new_ext) {
> + seq_printf(m, "Higher Context tbl entries for Bus: %d\n", bus);
> + ctx_lo = context[0].lo;
> +
> + if (!(ctx_lo & CONTEXT_PASIDE)) {
> + context[1].hi = (u64)virt_to_phys(
> + iommu->pasid_state_table);
> + context[1].lo = (u64)virt_to_phys(iommu->pasid_table) |
> + intel_iommu_get_pts(iommu);
> + }
> +
> + seq_printf(m, "[%d]\t%04x:%02x:%02x.%02x\t%llx\t%llx\n", ctx,
> + iommu->segment, bus, PCI_SLOT(ctx), PCI_FUNC(ctx),
> + context[1].lo, context[1].hi);
> + }
> +}
> +#else /* CONFIG_INTEL_IOMMU_SVM */
> +static void ext_ctx_tbl_entry_show(struct seq_file *m, void *unused,
> + struct intel_iommu *iommu, int bus, int ctx,
> + struct context_entry *context, bool new_ext)
> +{
> + return;
> +}
> +#endif /* CONFIG_INTEL_IOMMU_SVM */
> +
> static void ctx_tbl_entry_show(struct seq_file *m, void *unused,
> struct intel_iommu *iommu, int bus, bool ext,
> bool new_ext)
> @@ -69,6 +101,9 @@ static void ctx_tbl_entry_show(struct seq_file *m, void
> *unused,
> seq_printf(m, "[%d]\t%04x:%02x:%02x.%02x\t%llx\t%llx\n",
> ctx, iommu->segment, bus, PCI_SLOT(ctx),
> PCI_FUNC(ctx), context[0].lo, context[0].hi);
> +
> + ext_ctx_tbl_entry_show(m, unused, iommu, bus, ctx,
> + context, new_ext);
> }
> }
> out:
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