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Message-ID: <ZmbGBoRvNdwbVLO6@J2N7QTR9R3>
Date: Mon, 10 Jun 2024 10:23:18 +0100
From: Mark Rutland <mark.rutland@....com>
To: "Rob Herring (Arm)" <robh@...nel.org>
Cc: Russell King <linux@...linux.org.uk>,
Peter Zijlstra <peterz@...radead.org>,
Ingo Molnar <mingo@...hat.com>,
Arnaldo Carvalho de Melo <acme@...nel.org>,
Namhyung Kim <namhyung@...nel.org>,
Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
Jiri Olsa <jolsa@...nel.org>, Ian Rogers <irogers@...gle.com>,
Adrian Hunter <adrian.hunter@...el.com>,
Will Deacon <will@...nel.org>, Marc Zyngier <maz@...nel.org>,
Oliver Upton <oliver.upton@...ux.dev>,
James Morse <james.morse@....com>,
Suzuki K Poulose <suzuki.poulose@....com>,
Zenghui Yu <yuzenghui@...wei.com>,
Catalin Marinas <catalin.marinas@....com>,
linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
linux-perf-users@...r.kernel.org, kvmarm@...ts.linux.dev
Subject: Re: [PATCH 1/9] perf/arm: Move 32-bit PMU drivers to drivers/perf/
On Fri, Jun 07, 2024 at 02:31:26PM -0600, Rob Herring (Arm) wrote:
> It is preferred to put drivers under drivers/ rather than under arch/.
> The PMU drivers also depend on arm_pmu.c, so it's better to place them
> all together.
>
> Signed-off-by: Rob Herring (Arm) <robh@...nel.org>
Acked-by: Mark Rutland <mark.rutland@....com>
Mark.
> ---
> arch/arm/kernel/Makefile | 2 --
> drivers/perf/Kconfig | 12 ++++++++++++
> drivers/perf/Makefile | 3 +++
> arch/arm/kernel/perf_event_v6.c => drivers/perf/arm_v6_pmu.c | 3 ---
> arch/arm/kernel/perf_event_v7.c => drivers/perf/arm_v7_pmu.c | 3 ---
> .../perf_event_xscale.c => drivers/perf/arm_xscale_pmu.c | 3 ---
> 6 files changed, 15 insertions(+), 11 deletions(-)
>
> diff --git a/arch/arm/kernel/Makefile b/arch/arm/kernel/Makefile
> index 89a77e3f51d2..aaae31b8c4a5 100644
> --- a/arch/arm/kernel/Makefile
> +++ b/arch/arm/kernel/Makefile
> @@ -78,8 +78,6 @@ obj-$(CONFIG_CPU_XSC3) += xscale-cp0.o
> obj-$(CONFIG_CPU_MOHAWK) += xscale-cp0.o
> obj-$(CONFIG_IWMMXT) += iwmmxt.o
> obj-$(CONFIG_PERF_EVENTS) += perf_regs.o perf_callchain.o
> -obj-$(CONFIG_HW_PERF_EVENTS) += perf_event_xscale.o perf_event_v6.o \
> - perf_event_v7.o
> AFLAGS_iwmmxt.o := -Wa,-mcpu=iwmmxt
> obj-$(CONFIG_ARM_CPU_TOPOLOGY) += topology.o
> obj-$(CONFIG_VDSO) += vdso.o
> diff --git a/drivers/perf/Kconfig b/drivers/perf/Kconfig
> index 7526a9e714fa..aa9530b4064f 100644
> --- a/drivers/perf/Kconfig
> +++ b/drivers/perf/Kconfig
> @@ -56,6 +56,18 @@ config ARM_PMU
> Say y if you want to use CPU performance monitors on ARM-based
> systems.
>
> +config ARM_V6_PMU
> + depends on ARM_PMU && (CPU_V6 || CPU_V6K)
> + def_bool y
> +
> +config ARM_V7_PMU
> + depends on ARM_PMU && CPU_V7
> + def_bool y
> +
> +config ARM_XSCALE_PMU
> + depends on ARM_PMU && CPU_XSCALE
> + def_bool y
> +
> config RISCV_PMU
> depends on RISCV
> bool "RISC-V PMU framework"
> diff --git a/drivers/perf/Makefile b/drivers/perf/Makefile
> index 29b1c28203ef..d43df81d52f7 100644
> --- a/drivers/perf/Makefile
> +++ b/drivers/perf/Makefile
> @@ -6,6 +6,9 @@ obj-$(CONFIG_ARM_DSU_PMU) += arm_dsu_pmu.o
> obj-$(CONFIG_ARM_PMU) += arm_pmu.o arm_pmu_platform.o
> obj-$(CONFIG_ARM_PMU_ACPI) += arm_pmu_acpi.o
> obj-$(CONFIG_ARM_PMUV3) += arm_pmuv3.o
> +obj-$(CONFIG_ARM_V6_PMU) += arm_v6_pmu.o
> +obj-$(CONFIG_ARM_V7_PMU) += arm_v7_pmu.o
> +obj-$(CONFIG_ARM_XSCALE_PMU) += arm_xscale_pmu.o
> obj-$(CONFIG_ARM_SMMU_V3_PMU) += arm_smmuv3_pmu.o
> obj-$(CONFIG_FSL_IMX8_DDR_PMU) += fsl_imx8_ddr_perf.o
> obj-$(CONFIG_FSL_IMX9_DDR_PMU) += fsl_imx9_ddr_perf.o
> diff --git a/arch/arm/kernel/perf_event_v6.c b/drivers/perf/arm_v6_pmu.c
> similarity index 99%
> rename from arch/arm/kernel/perf_event_v6.c
> rename to drivers/perf/arm_v6_pmu.c
> index d9fd53841591..f7593843bb85 100644
> --- a/arch/arm/kernel/perf_event_v6.c
> +++ b/drivers/perf/arm_v6_pmu.c
> @@ -31,8 +31,6 @@
> * enable the interrupt.
> */
>
> -#if defined(CONFIG_CPU_V6) || defined(CONFIG_CPU_V6K)
> -
> #include <asm/cputype.h>
> #include <asm/irq_regs.h>
>
> @@ -445,4 +443,3 @@ static struct platform_driver armv6_pmu_driver = {
> };
>
> builtin_platform_driver(armv6_pmu_driver);
> -#endif /* CONFIG_CPU_V6 || CONFIG_CPU_V6K */
> diff --git a/arch/arm/kernel/perf_event_v7.c b/drivers/perf/arm_v7_pmu.c
> similarity index 99%
> rename from arch/arm/kernel/perf_event_v7.c
> rename to drivers/perf/arm_v7_pmu.c
> index a3322e2b3ea4..fdd936fbd188 100644
> --- a/arch/arm/kernel/perf_event_v7.c
> +++ b/drivers/perf/arm_v7_pmu.c
> @@ -17,8 +17,6 @@
> * counter and all 4 performance counters together can be reset separately.
> */
>
> -#ifdef CONFIG_CPU_V7
> -
> #include <asm/cp15.h>
> #include <asm/cputype.h>
> #include <asm/irq_regs.h>
> @@ -2002,4 +2000,3 @@ static struct platform_driver armv7_pmu_driver = {
> };
>
> builtin_platform_driver(armv7_pmu_driver);
> -#endif /* CONFIG_CPU_V7 */
> diff --git a/arch/arm/kernel/perf_event_xscale.c b/drivers/perf/arm_xscale_pmu.c
> similarity index 99%
> rename from arch/arm/kernel/perf_event_xscale.c
> rename to drivers/perf/arm_xscale_pmu.c
> index 7a2ba1c689a7..3d8b72d6b37f 100644
> --- a/arch/arm/kernel/perf_event_xscale.c
> +++ b/drivers/perf/arm_xscale_pmu.c
> @@ -13,8 +13,6 @@
> * PMU structures.
> */
>
> -#ifdef CONFIG_CPU_XSCALE
> -
> #include <asm/cputype.h>
> #include <asm/irq_regs.h>
>
> @@ -745,4 +743,3 @@ static struct platform_driver xscale_pmu_driver = {
> };
>
> builtin_platform_driver(xscale_pmu_driver);
> -#endif /* CONFIG_CPU_XSCALE */
>
> --
> 2.43.0
>
>
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