[coreboot-gerrit] New patch to review for coreboot: asus/f2a85-m: Enable IOMMU (again!)
Damien Zammit (damien@zamaudio.com)
gerrit at coreboot.org
Mon Aug 10 16:03:13 CEST 2015
Damien Zammit (damien at zamaudio.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/11154
-gerrit
commit 8937b6753bd36180af327884d1114ea2fcf8b3c2
Author: Damien Zammit <damien at zamaudio.com>
Date: Mon Aug 10 23:50:03 2015 +1000
asus/f2a85-m: Enable IOMMU (again!)
There were some issues previously when the IOMMU was enabled
on this board such as linux io page errors and compile errors.
(See Change-Id I0aa530be17d )
I built coreboot with this patch today, flashed it to my board
and it boots. Not only that but I didn't see any problems in
linux dmesg and I was able to use kvm pci passthrough using the IOMMU.
$ dmesg|grep AMD-Vi
[ 0.718814] AMD-Vi: Applying erratum 746 workaround for IOMMU at 0000:00:00.2
[ 0.719407] AMD-Vi: Found IOMMU at 0000:00:00.2 cap 0x40
[ 0.719409] AMD-Vi: Extended features: PreF PPR GT IA
[ 0.719412] AMD-Vi: Interrupt remapping enabled
[ 0.731430] AMD-Vi: Lazy IO/TLB flushing enabled
$ lspci -s 0.2
00:00.2 IOMMU: Advanced Micro Devices, Inc. [AMD] Family 15h (Models 10h-1fh) I/O Memory Management Unit
Change-Id: Idbd1ff8362731752af1fa5bd267f13d6dc821c52
Signed-off-by: Damien Zammit <damien at zamaudio.com>
---
src/mainboard/asus/f2a85-m/buildOpts.c | 2 +-
src/mainboard/asus/f2a85-m/devicetree.cb | 1 +
2 files changed, 2 insertions(+), 1 deletion(-)
diff --git a/src/mainboard/asus/f2a85-m/buildOpts.c b/src/mainboard/asus/f2a85-m/buildOpts.c
index b812cd5..3c9371c 100644
--- a/src/mainboard/asus/f2a85-m/buildOpts.c
+++ b/src/mainboard/asus/f2a85-m/buildOpts.c
@@ -181,7 +181,7 @@
#define BLDCFG_UMA_ABOVE4G_SUPPORT FALSE
#endif
-#define BLDCFG_IOMMU_SUPPORT FALSE
+#define BLDCFG_IOMMU_SUPPORT TRUE
#define BLDCFG_CFG_GNB_HD_AUDIO TRUE
//#define BLDCFG_IGPU_SUBSYSTEM_ID OEM_IGPU_SSID
diff --git a/src/mainboard/asus/f2a85-m/devicetree.cb b/src/mainboard/asus/f2a85-m/devicetree.cb
index 4562557..b501dc2 100644
--- a/src/mainboard/asus/f2a85-m/devicetree.cb
+++ b/src/mainboard/asus/f2a85-m/devicetree.cb
@@ -30,6 +30,7 @@ chip northbridge/amd/agesa/family15tn/root_complex
chip northbridge/amd/agesa/family15tn # PCI side of HT root complex
device pci 0.0 on end # Root Complex
+ device pci 0.2 on end # IOMMU
device pci 1.0 on end # Internal Graphics P2P bridge 0x99XX
device pci 1.1 on end # Internal Multimedia
device pci 2.0 on end # PCIE SLOT0 x16 blue
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