Messages in this thread | | | Date | Mon, 9 May 2016 13:49:27 +0200 | From | Joerg Roedel <> | Subject | Re: [PART2 RFC v1 1/9] iommu/amd: Detect and enable guest vAPIC support |
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On Fri, Apr 08, 2016 at 07:49:22AM -0500, Suthikulpanit, Suravee wrote: > From: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com> > > This patch introduces a new IOMMU driver parameter, amd_iommu_guest_ir, > which can be used to specify different interrupt remapping mode for > passthrough devices to VM guest: > * legacy: Legacy interrupt remapping mode (w/ 32-bit IRTE) > * ga : Guest vAPIC interrupt remapping mode (w/ 128-bit IRTE) > > Note that the GA mode also supports legacy interrupt remapping > for non-passthrough devices with the 128-bit IRTE.
Does this need to be under user control? The code can just check what the hardware supports and use the 128bit IRTEs if supported, no?
Joerg
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