linux-kernel - RE: [PATCH v8 3/5] cxl/pci: Find and register CXL PMU devices

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Date:   Sun, 25 Jun 2023 17:46:53 -0700
From:   Dan Williams <dan.j.williams@...el.com>
To:     Jonathan Cameron <Jonathan.Cameron@...wei.com>,
        Namhyung Kim <namhyung@...il.com>,
        Liang Kan <kan.liang@...ux.intel.com>,
        <linux-cxl@...r.kernel.org>, <peterz@...radead.org>
CC:     <mingo@...esetdhat.com>, <acme@...nel.org>, <mark.rutland@....com>,
        <will@...nel.org>, <dan.j.williams@...el.com>,
        <linuxarm@...wei.com>, <linux-perf-users@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        Davidlohr Bueso <dave@...olabs.net>,
        Dave Jiang <dave.jiang@...el.com>
Subject: RE: [PATCH v8 3/5] cxl/pci: Find and register CXL PMU devices

Jonathan Cameron wrote:
> CXL PMU devices can be found from entries in the Register
> Locator DVSEC.
> 
> Reviewed-by: Dan Williams <dan.j.williams@...el.com>
> Reviewed-by: Dave Jiang <dave.jiang@...el.com>
> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@...wei.com>
> ---
>  drivers/cxl/core/Makefile |  1 +
>  drivers/cxl/core/core.h   |  1 +
>  drivers/cxl/core/pmu.c    | 68 +++++++++++++++++++++++++++++++++++++++
>  drivers/cxl/core/port.c   |  2 ++
>  drivers/cxl/core/regs.c   | 16 +++++++++
>  drivers/cxl/cxl.h         | 13 ++++++++
>  drivers/cxl/cxlpci.h      |  1 +
>  drivers/cxl/pci.c         | 26 ++++++++++++++-
>  drivers/cxl/pmu.h         | 28 ++++++++++++++++
>  9 files changed, 155 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/cxl/core/Makefile b/drivers/cxl/core/Makefile
> index ca4ae31d8f57..1f66b5d4d935 100644
> --- a/drivers/cxl/core/Makefile
> +++ b/drivers/cxl/core/Makefile
> @@ -12,5 +12,6 @@ cxl_core-y += memdev.o
>  cxl_core-y += mbox.o
>  cxl_core-y += pci.o
>  cxl_core-y += hdm.o
> +cxl_core-y += pmu.o

One small addition I will make to this patch is to fix the cxl_test
build with the following complimentary change:

diff --git a/tools/testing/cxl/Kbuild b/tools/testing/cxl/Kbuild
index 6f9347ade82c..aa0ca7095a64 100644
--- a/tools/testing/cxl/Kbuild
+++ b/tools/testing/cxl/Kbuild
@@ -57,6 +57,7 @@ cxl_core-y += $(CXL_CORE_SRC)/memdev.o
 cxl_core-y += $(CXL_CORE_SRC)/mbox.o
 cxl_core-y += $(CXL_CORE_SRC)/pci.o
 cxl_core-y += $(CXL_CORE_SRC)/hdm.o
+cxl_core-y += $(CXL_CORE_SRC)/pmu.o
 cxl_core-$(CONFIG_TRACING) += $(CXL_CORE_SRC)/trace.o
 cxl_core-$(CONFIG_CXL_REGION) += $(CXL_CORE_SRC)/region.o
 cxl_core-y += config_check.o