| Message ID | 20210722042450.11862-3-matt@traverse.com.au (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Add Traverse Technologies Ten64 board DTS | expand |
On Thu, Jul 22, 2021 at 04:24:47AM +0000, Mathew McBride wrote: > 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 <matt@traverse.com.au> > --- > 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 >
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";
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 <matt@traverse.com.au> --- arch/arm64/boot/dts/freescale/fsl-ls1088a.dtsi | 5 +++++ 1 file changed, 5 insertions(+)