On Fri, Dec 20, 2024 at 12:52:33PM +0530, Anshuman Khandual wrote: > 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 In case it is not clear, this series should be applied to 6.13 as the 2 PMUv3p9 features already landed in 6.13 (per counter EL0 control) and 6.12 (ICNTR). Rob
