RE: [PATCH] iommu/vt-d: Enhance capability check for nested parent domain allocation

From: Liu, Yi L yi.l.liu@intel.com Sent: Tuesday, October 24, 2023 11:00 PM

This adds the scalable mode check before allocating the nested parent domain as checking nested capability is not enough. User may turn off scalable mode which also means no nested support even if the hardware supports it.

Fixes: c97d1b20d383 ("iommu/vt-d: Add domain_alloc_user op") Signed-off-by: Yi Liu yi.l.liu@intel.com

Reviewed-by: Kevin Tian kevin.tian@intel.com