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.
The following commits that enabled access into FEAT_PMUv3p9 registers have already been merged upstream from 6.13 onwards.
d8226d8cfbaf ("perf: arm_pmuv3: Add support for Armv9.4 PMU instruction counter") 0bbff9ed8165 ("perf/arm_pmuv3: Add PMUv3.9 per counter EL0 access control")
The sysreg patches in this series are required for the final patch which fixes the actual problem.
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 | 22 ++++++ arch/arm64/include/asm/el2_setup.h | 25 +++++++ arch/arm64/tools/sysreg | 103 +++++++++++++++++++++++++++ 3 files changed, 150 insertions(+)