[PATCH v3 04/26] fs/resctrl: Set up Kconfig options for telemetry events

Tony Luck
2025-04-07T23:40:48Z

Enumeration support is provided by the Intel PMT subsystem.

arch/x86 selects this option based on:

X86_64: Counter registers are in MMIO space. There is no readq()
function on 32-bit. Emulation is possible with readl(), but there
are races. Running 32-bit kernels on systems that support this
feature seems pointless.

CPU_SUP_INTEL: It is an Intel specific feature.

Signed-off-by: Tony Luck <tony.luck@intel.com>
---
arch/x86/Kconfig | 1 +
drivers/platform/x86/intel/pmt/Kconfig | 6 ++++++
2 files changed, 7 insertions(+)

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index ea29d22a621f..44a195ee7a42 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -504,6 +504,7 @@ config X86_CPU_RESCTRL
bool "x86 CPU resource control support"
depends on X86 && (CPU_SUP_INTEL || CPU_SUP_AMD)
depends on MISC_FILESYSTEMS
+ select INTEL_AET_RESCTRL if (X86_64 && CPU_SUP_INTEL)
select ARCH_HAS_CPU_RESCTRL
select RESCTRL_FS
select RESCTRL_FS_PSEUDO_LOCK
diff --git a/drivers/platform/x86/intel/pmt/Kconfig b/drivers/platform/x86/intel/pmt/Kconfig
index e916fc966221..b282910b49ef 100644
--- a/drivers/platform/x86/intel/pmt/Kconfig
+++ b/drivers/platform/x86/intel/pmt/Kconfig
@@ -38,3 +38,9 @@ config INTEL_PMT_CRASHLOG

To compile this driver as a module, choose M here: the module
will be called intel_pmt_crashlog.
+
+config INTEL_AET_RESCTRL
+ bool
+ help
+ Architecture config should "select" this option to enable
+ support for RMID telemtry events in the resctrl file system.
--
2.48.1