This series adds fine grained trap control in EL2 required for FEAT_PMUv3p9 registers like PMICNTR_EL0, PMICFILTR_EL0, and PMUACR_EL1 which are already being used in the kernel. This is required to prevent their EL1 access trap into EL2. PMZR_EL0 register trap control i.e HDFGWTR2_EL2.nPMZR_EL0 remains unchanged for now as it does not get accessed in the kernel, and there is no plan for its access from user space. I have taken the liberty to pick up all the review tags for patches related to tools sysreg update from the KVM FGT2 V2 patch series posted earlier. https://lore.kernel.org/all/20241210055311.780688-1-anshuman.khandual@xxxxxxx/ Rob had earler mentioned about FEAT_FGT2 based trap control requirement for FEAT_PMUv3p9 registers that are currently being used in kernel. The context can be found here. https://lore.kernel.org/all/20241216234251.GA629562-robh@xxxxxxxxxx/ This series is based on v6.13-rc3 Cc: Catalin Marinas <catalin.marinas@xxxxxxx> Cc: Will Deacon <will@xxxxxxxxxx> Cc: Marc Zyngier <maz@xxxxxxxxxx> Cc: Ryan Roberts <ryan.roberts@xxxxxxx> Cc: Mark Rutland <mark.rutland@xxxxxxx> Cc: Mark Brown <robh@xxxxxxxxxx> Cc: Rob Herring <robh@xxxxxxxxxx> Cc: Oliver Upton <oliver.upton@xxxxxxxxx> Cc: Jonathan Corbet <corbet@xxxxxxx> Cc: Eric Auger <eric.auger@xxxxxxxxxx> Cc: kvmarm@xxxxxxxxxxxxxxx Cc: linux-doc@xxxxxxxxxxxxxxx Cc: linux-kernel@xxxxxxxxxxxxxxx Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx Anshuman Khandual (7): arm64/sysreg: Update register fields for ID_AA64MMFR0_EL1 arm64/sysreg: Add register fields for HDFGRTR2_EL2 arm64/sysreg: Add register fields for HDFGWTR2_EL2 arm64/sysreg: Add register fields for HFGITR2_EL2 arm64/sysreg: Add register fields for HFGRTR2_EL2 arm64/sysreg: Add register fields for HFGWTR2_EL2 arm64/boot: Enable EL2 requirements for FEAT_PMUv3p9 Documentation/arch/arm64/booting.rst | 18 +++++ arch/arm64/include/asm/el2_setup.h | 25 +++++++ arch/arm64/tools/sysreg | 103 +++++++++++++++++++++++++++ 3 files changed, 146 insertions(+) -- 2.25.1
