KVM: arm64: Advertise STALL_SLOT* in PMCEID1 under strict PMUv3 UAPI

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Skip masking STALL_SLOT, STALL_SLOT_FRONTEND and STALL_SLOT_BACKEND out
of PMCEID1 when KVM_ARM_VCPU_PMU_V3_STRICT is set, because this is when
PMMIR_EL1.SLOTS is exposed to guests, making these events meaningful for
collection.

Change the parameter of compute_pmceid1() from arm_pmu to kvm_vcpu, to
check if KVM_ARM_VCPU_PMU_V3_STRICT is set. Also updated the signature of
compute_pmceid0() for consistency.

Signed-off-by: Congkai Tan <congkai@amazon.com>
Reviewed-by: Geoff Blake <blakgeof@amazon.com>
Reviewed-by: Haris Okanovic <harisokn@amazon.com>
Reviewed-by: Stanislav Spassov <stanspas@amazon.de>
Reviewed-by: Fuad Tabba <fuad.tabba@linux.dev>
Tested-by: Fuad Tabba <fuad.tabba@linux.dev>
Link: https://patch.msgid.link/20260722202702.4165917-3-congkai@amazon.com
Signed-off-by: Oliver Upton <oupton@kernel.org>

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Congkai Tan 2026-07-22 20:27:00 +00:00 • committed by Oliver Upton

parent 453f6ff04b

commit 203b22f76d

1 changed files with 13 additions and 12 deletions

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arch/arm64/kvm/pmu-emul.c

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