From: Tomasz Nowicki <tn@semihalf.com>
To: will@kernel.org, robin.murphy@arm.com, joro@8bytes.org,
gregory.clement@bootlin.com, robh+dt@kernel.org,
hannah@marvell.com
Cc: devicetree@vger.kernel.org, catalin.marinas@arm.com,
d.odintsov@traviangames.com, linux-kernel@vger.kernel.org,
stable@vger.kernel.org, nadavh@marvell.com,
iommu@lists.linux-foundation.org,
Tomasz Nowicki <tn@semihalf.com>,
mw@semihalf.com, linux-arm-kernel@lists.infradead.org
Subject: [PATCH 1/1] arm64: dts: marvell: keep SMMU disabled by default for Armada 7040 and 8040
Date: Thu, 5 Nov 2020 12:26:02 +0100 [thread overview]
Message-ID: <20201105112602.164739-1-tn@semihalf.com> (raw)
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: 83a3545d9c37 ("arm64: dts: marvell: add SMMU support")
Cc: <stable@vger.kernel.org> # 5.9+
Signed-off-by: Tomasz Nowicki <tn@semihalf.com>
---
arch/arm64/boot/dts/marvell/armada-7040.dtsi | 4 ----
arch/arm64/boot/dts/marvell/armada-8040.dtsi | 4 ----
2 files changed, 8 deletions(-)
diff --git a/arch/arm64/boot/dts/marvell/armada-7040.dtsi b/arch/arm64/boot/dts/marvell/armada-7040.dtsi
index 7a3198cd7a07..2f440711d21d 100644
--- a/arch/arm64/boot/dts/marvell/armada-7040.dtsi
+++ b/arch/arm64/boot/dts/marvell/armada-7040.dtsi
@@ -15,10 +15,6 @@ / {
"marvell,armada-ap806";
};
-&smmu {
- status = "okay";
-};
-
&cp0_pcie0 {
iommu-map =
<0x0 &smmu 0x480 0x20>,
diff --git a/arch/arm64/boot/dts/marvell/armada-8040.dtsi b/arch/arm64/boot/dts/marvell/armada-8040.dtsi
index 79e8ce59baa8..22c2d6ebf381 100644
--- a/arch/arm64/boot/dts/marvell/armada-8040.dtsi
+++ b/arch/arm64/boot/dts/marvell/armada-8040.dtsi
@@ -15,10 +15,6 @@ / {
"marvell,armada-ap806";
};
-&smmu {
- status = "okay";
-};
-
&cp0_pcie0 {
iommu-map =
<0x0 &smmu 0x480 0x20>,
--
2.25.1
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next reply other threads:[~2020-11-05 11:27 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-05 11:26 Tomasz Nowicki [this message]
2020-11-30 14:36 ` [PATCH 1/1] arm64: dts: marvell: keep SMMU disabled by default for Armada 7040 and 8040 Gregory CLEMENT
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