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3f710be02e
The below warning may be triggered on GNR when the PCIE uncore units are exposed. WARNING: CPU: 4 PID: 1 at arch/x86/events/intel/uncore.c:1169 uncore_pci_pmu_register+0x158/0x190 The current uncore driver assumes that all the devices in the same PMU have the exact same devfn. It's true for the previous platforms. But it doesn't work for the new PCIE uncore units on GNR. The assumption doesn't make sense. There is no reason to limit the devices from the same PMU to the same devfn. Also, the current code just throws the warning, but still registers the device. The WARN_ON_ONCE() should be removed. The func_id is used by the later event_init() to check if a event->pmu has valid devices. For cpu and mmio uncore PMUs, they are always valid. For pci uncore PMUs, it's set when the PMU is registered. It can be replaced by the pmu->registered. Clean up the func_id. Signed-off-by: Kan Liang <kan.liang@linux.intel.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Tested-by: Eric Hu <eric.hu@intel.com> Link: https://lkml.kernel.org/r/20250108143017.1793781-1-kan.liang@linux.intel.com |
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Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.