Thread (25 messages) read the whole thread 25 messages, 4 authors, 2021-08-10
STALE1815d

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[PATCH 2/5] arm64: dts: ls1088a: add missing PMU node

From: Mathew McBride <hidden>
Date: 2021-07-22 04:26:23
Also in: linux-arm-kernel
Subsystem: arm/freescale layerscape arm architecture, the rest · Maintainers: Frank Li, Linus Torvalds

The Performance Manager Unit was not described in the DTS
which meant performance event monitoring was not possible.

This was exposed by a change to the PMU handling in KVM
in 5.11-rc3 which now prevents a PMU being exposed to a
guest when the host does not provide one:
"KVM: arm64: Don't access PMCR_EL0 when no PMU is available"

Signed-off-by: Mathew McBride <redacted>
---
 arch/arm64/boot/dts/freescale/fsl-ls1088a.dtsi | 5 +++++
 1 file changed, 5 insertions(+)
diff --git a/arch/arm64/boot/dts/freescale/fsl-ls1088a.dtsi b/arch/arm64/boot/dts/freescale/fsl-ls1088a.dtsi
index 79ceadc9dc4a..752c7f41e6b1 100644
--- a/arch/arm64/boot/dts/freescale/fsl-ls1088a.dtsi
+++ b/arch/arm64/boot/dts/freescale/fsl-ls1088a.dtsi
@@ -189,6 +189,11 @@ timer {
 			     <1 10 IRQ_TYPE_LEVEL_LOW>;/* Hypervisor PPI */
 	};
 
+	pmu {
+		compatible = "arm,armv8-pmuv3";
+		interrupts = <1 7 0x8>; /* PMU PPI, Level low type */
+	};
+
 	psci {
 		compatible = "arm,psci-0.2";
 		method = "smc";
-- 
2.30.1
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