On 11/09/2019 14:46, Chris Wilson wrote: > There's no easy way of checking whether iommu is enabled for the GPU > (you can grep dmesg if you know the device, or you can grep > i915_gpu_info if that's available). We do have a central > i915_capabilities with the intent of listing such pertinent information, > so add the iommu status. > > Suggested-by: Martin Peres <[email protected]> > Signed-off-by: Chris Wilson <[email protected]> > Cc: Martin Peres <[email protected]> > Cc: Tomi Sarvela <[email protected]> > Cc: Mika Kuoppala <[email protected]> > --- > drivers/gpu/drm/i915/i915_debugfs.c | 7 +++++++ > 1 file changed, 7 insertions(+) > > diff --git a/drivers/gpu/drm/i915/i915_debugfs.c > b/drivers/gpu/drm/i915/i915_debugfs.c > index 708855e051b5..e5835337f022 100644 > --- a/drivers/gpu/drm/i915/i915_debugfs.c > +++ b/drivers/gpu/drm/i915/i915_debugfs.c > @@ -61,11 +61,18 @@ static int i915_capabilities(struct seq_file *m, void > *data) > struct drm_i915_private *dev_priv = node_to_i915(m->private); > const struct intel_device_info *info = INTEL_INFO(dev_priv); > struct drm_printer p = drm_seq_file_printer(m); > + const char *msg; > > seq_printf(m, "gen: %d\n", INTEL_GEN(dev_priv)); > seq_printf(m, "platform: %s\n", intel_platform_name(info->platform)); > seq_printf(m, "pch: %d\n", INTEL_PCH_TYPE(dev_priv)); > > + msg = "n/a";
Here, "n/a" really means "kernel not compiled with IOMMU support". Should we find a wording better explaining this to users? Or are we going to tell users to check their dmesg for IOMMU messages and if there are none, it means either the kernel has not been compiled with support for it, or an option needs to be enabled in the bios, or the platform lacks support? Anyway, thanks! Acked-by: Martin Peres <[email protected]> > +#ifdef CONFIG_INTEL_IOMMU > + msg = enableddisabled(intel_iommu_gfx_mapped); > +#endif > + seq_printf(m, "iommu: %s\n", msg); > + > intel_device_info_dump_flags(info, &p); > intel_device_info_dump_runtime(RUNTIME_INFO(dev_priv), &p); > intel_driver_caps_print(&dev_priv->caps, &p); > _______________________________________________ Intel-gfx mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/intel-gfx
