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arm64: dts: marvell: keep SMMU disabled by default for Armada 7040 and 8040

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commit f43cadef2df260101497a6aace05e24201f00202 upstream.

FW has to configure devices' StreamIDs so that SMMU is able to lookup
context and do proper translation later on. For Armada 7040 & 8040 and
publicly available FW, most of the devices are configured properly,
but some like ap_sdhci0, PCIe, NIC still remain unassigned which
results in SMMU faults about unmatched StreamID (assuming
ARM_SMMU_DISABLE_BYPASS_BY_DEFAUL=y).

Since there is dependency on custom FW let SMMU be disabled by default.
People who still willing to use SMMU need to enable manually and
use ARM_SMMU_DISABLE_BYPASS_BY_DEFAUL=n (or via kernel command line)
with extra caution.

Fixes: 83a3545d9c ("arm64: dts: marvell: add SMMU support")
Cc: <stable@vger.kernel.org> # 5.9+
Signed-off-by: Tomasz Nowicki <tn@semihalf.com>
Signed-off-by: Gregory CLEMENT <gregory.clement@bootlin.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Tomasz Nowicki 2020-11-05 12:26:02 +01:00 committed by Greg Kroah-Hartman
parent 0403bf25a4
commit e0dad9a78c
2 changed files with 0 additions and 8 deletions
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4
arch/arm64/boot/dts/marvell/armada-7040.dtsi
View File

@ -15,10 +15,6 @@ / {
"marvell,armada-ap806";
};
&smmu {
status = "okay";
};
&cp0_pcie0 {
iommu-map =
<0x0 &smmu 0x480 0x20>,

4
arch/arm64/boot/dts/marvell/armada-8040.dtsi
View File

@ -15,10 +15,6 @@ / {
"marvell,armada-ap806";
};
&smmu {
status = "okay";
};
&cp0_pcie0 {
iommu-map =
<0x0 &smmu 0x480 0x20>,