From: Zeng Heng <zengheng4@huawei.com>
To: <xry111@xry111.site>, <catalin.marinas@arm.com>, <maz@kernel.org>,
<ardb@kernel.org>, <yang@os.amperecomputing.com>,
<ryan.roberts@arm.com>, <kevin.brodsky@arm.com>,
<reinette.chatre@intel.com>, <miko.lenczewski@arm.com>,
<will@kernel.org>, <suzuki.poulose@arm.com>, <thuth@redhat.com>,
<ben.horgan@arm.com>, <james.clark@linaro.org>,
<james.morse@arm.com>, <lpieralisi@kernel.org>,
<broonie@kernel.org>, <oupton@kernel.org>,
<anshuman.khandual@arm.com>, <yeoreum.yun@arm.com>,
<leo.yan@arm.com>, <mrigendra.chaubey@gmail.com>,
<fenghuay@nvidia.com>, <ahmed.genidi@arm.com>,
<mark.rutland@arm.com>
Cc: <linux-kernel@vger.kernel.org>,
<linux-arm-kernel@lists.infradead.org>,
<wangkefeng.wang@huawei.com>
Subject: [PATCH v2 0/2] arm_mpam: Add support for the MPAM v0.1 architecture version
Date: Tue, 3 Feb 2026 17:54:04 +0800 [thread overview]
Message-ID: <20260203095406.6437-1-zengheng4@huawei.com> (raw)
According to the MPAM spec [1], the supported architecture versions are
v1.0, v1.1 and v0.1. MPAM versions v0.1 and v1.1 are functionally
identical, but v0.1 additionally supports the FORCE_NS feature.
ID_AA64PR | ID_AA64PR | MPAM Extension | Notes
F0_EL1. | F1_EL1. | Architecture |
MPAM | MPAM_frac | version |
---------------------------------------------------------------------------
0b0000 | 0b0001 | v0.1 | MPAM v0.1 is implemented.
| | | MPAM v0.1 is the same as MPAM v1.1
| | | with FORCE_NS which is
| | | incompatible with MPAM v1.0.
---------------------------------------------------------------------------
0b0001 | 0b0000 | v1.0 | MPAM v1.0 is implemented.
---------------------------------------------------------------------------
0b0001 | 0b0001 | v1.1 | MPAM v1.1 is implemented.
| | | MPAM v1.1 includes all features of
| | | MPAM v1.0.
| | | It must not include FORCE_NS.
[1] https://developer.arm.com/documentation/ddi0598/db/?lang=en
Changes in v2:
- Add new patch 2 to check the MPAM MSC version.
v1: https://lore.kernel.org/all/20260104133434.1887677-1-zengheng4@huawei.com/
Zeng Heng (2):
arm64: cpufeature: Add support for the MPAM v0.1 architecture version
arm_mpam: Update architecture version check for MPAM MSC
arch/arm64/include/asm/cpufeature.h | 7 +++++++
arch/arm64/include/asm/el2_setup.h | 4 +++-
arch/arm64/kernel/cpufeature.c | 15 +++++++++++----
drivers/resctrl/mpam_devices.c | 16 +++++++++++++---
drivers/resctrl/mpam_internal.h | 5 ++++-
5 files changed, 38 insertions(+), 9 deletions(-)
--
2.25.1
next reply other threads:[~2026-02-03 9:54 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-02-03 9:54 Zeng Heng [this message]
2026-02-03 9:54 ` [PATCH v2 1/2] arm64: cpufeature: Add support for the MPAM v0.1 architecture version Zeng Heng
2026-05-07 14:09 ` James Morse
2026-05-08 6:04 ` Zeng Heng
2026-02-03 9:54 ` [PATCH v2 2/2] arm_mpam: Update architecture version check for MPAM MSC Zeng Heng
2026-05-07 16:03 ` James Morse
2026-05-08 2:26 ` Zeng Heng
2026-05-08 3:47 ` Zeng Heng
2026-05-08 9:37 ` Ben Horgan
2026-05-08 9:56 ` Ben Horgan
2026-05-08 16:07 ` James Morse
2026-03-07 8:50 ` [PATCH v2 0/2] arm_mpam: Add support for the MPAM v0.1 architecture version Zeng Heng
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