iommu/vt-d: Enable QI on all IOMMUs before setting root entry

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commit a4c34ff1c0 upstream.

This seems to be required on some X58 chipsets on systems
with more than one IOMMU. QI does not work until it is
enabled on all IOMMUs in the system.

Reported-by: Dheeraj CVR <cvr.dheeraj@gmail.com>
Tested-by: Dheeraj CVR <cvr.dheeraj@gmail.com>
Fixes: 5f0a7f7614 ('iommu/vt-d: Make root entry visible for hardware right after allocation')
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Joerg Roedel 2016-06-17 11:29:48 +02:00 • committed by Greg Kroah-Hartman

parent c9566f67f0

commit 72803a72a6

1 changed files with 12 additions and 5 deletions

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17

drivers/iommu/intel-iommu.c

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