Re: [Xen-devel] [PATCH v2] VT-d: don't panic/warn on iommu=no-igfx

2017-07-31 Thread Tian, Kevin
> From: Rusty Bird [mailto:rustyb...@openmailbox.org] > Sent: Monday, July 31, 2017 5:04 PM > > When operating on an Intel graphics device, iommu_enable_translation() > panicked (force_iommu==1) or warned (force_iommu==0) about the BIOS if > is_igd_vt_enabled_quirk() returned 0. That's good if

[Xen-devel] [PATCH v2] VT-d: don't panic/warn on iommu=no-igfx

2017-07-31 Thread Rusty Bird
When operating on an Intel graphics device, iommu_enable_translation() panicked (force_iommu==1) or warned (force_iommu==0) about the BIOS if is_igd_vt_enabled_quirk() returned 0. That's good if the actual BIOS problem has been detected. But since commit 1463411, returning 0 could also happen if