From: Marc Zyngier <maz@kernel.org>
To: kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org
Cc: Joey Gouly <joey.gouly@arm.com>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
Oliver Upton <oliver.upton@linux.dev>,
Zenghui Yu <yuzenghui@huawei.com>
Subject: [PATCH 0/2] KVM: arm64: EL2 PMU reset handling fixes
Date: Mon, 17 Feb 2025 11:24:10 +0000 [thread overview]
Message-ID: <20250217112412.3963324-1-maz@kernel.org> (raw)
Joey reports that some of his PMU tests do not behave quite as
expected:
- MDCR_EL2.HPMN is set to 0 out of reset
- PMCR_EL0.P should reset all the counters when written from EL2
These couple of patches attempt to remedy the situation. Note that
they have only been compile-tested.
Marc Zyngier (2):
KVM: arm64: Fix MDCR_EL2.HPMN reset value
KVM: arm64: Contextualise the handling of PMCR_EL0.P writes
arch/arm64/kvm/pmu-emul.c | 21 ++++++++++++++++-----
arch/arm64/kvm/sys_regs.c | 7 ++++++-
2 files changed, 22 insertions(+), 6 deletions(-)
--
2.39.2
next reply other threads:[~2025-02-17 11:24 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-02-17 11:24 Marc Zyngier [this message]
2025-02-17 11:24 ` [PATCH 1/2] KVM: arm64: Fix MDCR_EL2.HPMN reset value Marc Zyngier
2025-02-17 18:53 ` Oliver Upton
2025-02-19 14:03 ` Marc Zyngier
2025-02-19 19:04 ` Oliver Upton
2025-02-19 21:10 ` Marc Zyngier
2025-02-17 11:24 ` [PATCH 2/2] KVM: arm64: Contextualise the handling of PMCR_EL0.P writes Marc Zyngier
2025-02-17 18:33 ` Oliver Upton
2025-02-20 10:44 ` [PATCH 0/2] KVM: arm64: EL2 PMU reset handling fixes Joey Gouly
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