perf/x86/intel/uncore: Implement global init callback for GNR uncore

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On Sierra Forest and Clearwater Forest, the FRZ_ALL bit in the global
control register defaults to 0 at boot, but UBOX PMON units do not
work until the global control register is explicitly written with 0
to trigger hardware initialization properly.

Implement the generic uncore_msr_global_init() callback and add it to
gnr_uncore_init[], which is shared by GNR, GRR, SRF, and CWF.

Fixes: 632c4bf6d0 ("perf/x86/intel/uncore: Support Granite Rapids")
Signed-off-by: Zide Chen <zide.chen@intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Dapeng Mi <dapeng1.mi@linux.intel.com>
Link: https://patch.msgid.link/20260602144908.263680-8-zide.chen@intel.com

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Zide Chen 2026-06-02 07:49:08 -07:00 • committed by Peter Zijlstra

parent 2aa7dacf8a

commit 1a308a168c

3 changed files with 18 additions and 6 deletions

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13

arch/x86/events/intel/uncore.c

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2

arch/x86/events/intel/uncore.h

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9

arch/x86/events/intel/uncore_discovery.c

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