diff options
| author | Martin Roth <martinroth@google.com> | 2018-10-29 13:35:04 -0600 |
|---|---|---|
| committer | Martin Roth <martinroth@google.com> | 2018-10-30 20:11:51 +0000 |
| commit | d80884ea5a73faa475ac58977e4829439d43dab3 (patch) | |
| tree | bd947b499c1c9ebaef0d9858e723f7854b38526b | |
| parent | 41baf0c3ff8bf23a154eb6505c4e254f5bdc253b (diff) | |
mb/google/kahlee: Disable IOMMU
Unfortunately Stoney has an issue where enabling the IOMMU causes
a 10%-50% decrease in the integrated graphics performance. It is
also disabled by default on other stoney platforms.
BUG=b:118612241
TEST=Verify that IOMMU is disabled.
Change-Id: Ia396c7227cb21461ec8afbdf746721d4fb28083d
Signed-off-by: Martin Roth <martinroth@google.com>
Reviewed-on: https://review.coreboot.org/29342
Reviewed-by: Raul Rangel <rrangel@chromium.org>
Reviewed-by: Daniel Kurtz <djkurtz@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
5 files changed, 5 insertions, 5 deletions
diff --git a/src/mainboard/google/kahlee/variants/aleena/devicetree.cb b/src/mainboard/google/kahlee/variants/aleena/devicetree.cb index 5438e6dd41..27a8e28cd5 100644 --- a/src/mainboard/google/kahlee/variants/aleena/devicetree.cb +++ b/src/mainboard/google/kahlee/variants/aleena/devicetree.cb @@ -58,7 +58,7 @@ chip soc/amd/stoneyridge end device domain 0 on device pci 0.0 on end # Root Complex - device pci 0.2 on end # IOMMU + device pci 0.2 off end # IOMMU (Disabled for performance and battery) device pci 1.0 on end # Internal Graphics P2P bridge 0x98e4 device pci 1.1 on end # Internal Multimedia device pci 2.0 on end # PCIe Host Bridge diff --git a/src/mainboard/google/kahlee/variants/careena/devicetree.cb b/src/mainboard/google/kahlee/variants/careena/devicetree.cb index b541c0305e..23253b2ca9 100644 --- a/src/mainboard/google/kahlee/variants/careena/devicetree.cb +++ b/src/mainboard/google/kahlee/variants/careena/devicetree.cb @@ -61,7 +61,7 @@ chip soc/amd/stoneyridge end device domain 0 on device pci 0.0 on end # Root Complex - device pci 0.2 on end # IOMMU + device pci 0.2 off end # IOMMU (Disabled for performance and battery) device pci 1.0 on end # Internal Graphics P2P bridge 0x98e4 device pci 1.1 on end # Internal Multimedia device pci 2.0 on end # PCIe Host Bridge diff --git a/src/mainboard/google/kahlee/variants/delan/devicetree.cb b/src/mainboard/google/kahlee/variants/delan/devicetree.cb index 0dfe204bfa..fd30d5df84 100644 --- a/src/mainboard/google/kahlee/variants/delan/devicetree.cb +++ b/src/mainboard/google/kahlee/variants/delan/devicetree.cb @@ -55,7 +55,7 @@ chip soc/amd/stoneyridge end device domain 0 on device pci 0.0 on end # Root Complex - device pci 0.2 on end # IOMMU + device pci 0.2 off end # IOMMU (Disabled for performance and battery) device pci 1.0 on end # Internal Graphics P2P bridge 0x98e4 device pci 1.1 on end # Internal Multimedia device pci 2.0 on end # PCIe Host Bridge diff --git a/src/mainboard/google/kahlee/variants/grunt/devicetree.cb b/src/mainboard/google/kahlee/variants/grunt/devicetree.cb index 5a8906b3b1..b37e1bf0ac 100644 --- a/src/mainboard/google/kahlee/variants/grunt/devicetree.cb +++ b/src/mainboard/google/kahlee/variants/grunt/devicetree.cb @@ -61,7 +61,7 @@ chip soc/amd/stoneyridge end device domain 0 on device pci 0.0 on end # Root Complex - device pci 0.2 on end # IOMMU + device pci 0.2 off end # IOMMU (Disabled for performance and battery) device pci 1.0 on end # Internal Graphics P2P bridge 0x98e4 device pci 1.1 on end # Internal Multimedia device pci 2.0 on end # PCIe Host Bridge diff --git a/src/mainboard/google/kahlee/variants/liara/devicetree.cb b/src/mainboard/google/kahlee/variants/liara/devicetree.cb index cea3425aff..343fbeb4dc 100644 --- a/src/mainboard/google/kahlee/variants/liara/devicetree.cb +++ b/src/mainboard/google/kahlee/variants/liara/devicetree.cb @@ -58,7 +58,7 @@ chip soc/amd/stoneyridge end device domain 0 on device pci 0.0 on end # Root Complex - device pci 0.2 on end # IOMMU + device pci 0.2 off end # IOMMU device pci 1.0 on end # Internal Graphics P2P bridge 0x98e4 device pci 1.1 on end # Internal Multimedia device pci 2.0 on end # PCIe Host Bridge |