Re: [PATCH 2/5] arm64: dts: ls1088a: add missing PMU node
From: Shawn Guo <shawnguo@kernel.org>
Date: 2021-07-23 08:36:53
Also in:
linux-arm-kernel
On Thu, Jul 22, 2021 at 04:24:47AM +0000, Mathew McBride wrote:
quoted hunk ↗ jump to hunk
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 */
Use define GIC_PPI and IRQ_TYPE_LEVEL_LOW, so that you can drop the comment. Shawn
+ };
+
psci {
compatible = "arm,psci-0.2";
method = "smc";
--
2.30.1