On 3/12/25 09:16, Anshuman Khandual wrote: > > > On 3/11/25 22:47, Catalin Marinas wrote: >> On Thu, 27 Feb 2025 09:21:19 +0530, Anshuman Khandual wrote: >>> FEAT_PMUv3p9 registers such as PMICNTR_EL0, PMICFILTR_EL0, and PMUACR_EL1 >>> access from EL1 requires appropriate EL2 fine grained trap configuration >>> via FEAT_FGT2 based trap control registers HDFGRTR2_EL2 and HDFGWTR2_EL2. >>> Otherwise such register accesses will result in traps into EL2. >>> >>> Add a new helper __init_el2_fgt2() which initializes FEAT_FGT2 based fine >>> grained trap control registers HDFGRTR2_EL2 and HDFGWTR2_EL2 (setting the >>> bits nPMICNTR_EL0, nPMICFILTR_EL0 and nPMUACR_EL1) to enable access into >>> PMICNTR_EL0, PMICFILTR_EL0, and PMUACR_EL1 registers. >>> >>> [...] >> >> Applied to arm64 (for-next/el2-enable-feat-pmuv3p9), thanks! >> >> [1/1] arm64/boot: Enable EL2 requirements for FEAT_PMUv3p9 >> https://git.kernel.org/arm64/c/858c7bfcb35e >> >> I removed Cc: stable since, if it gets backported automatically, it will >> miss the sysreg updates and break the build. Please send it to stable >> directly once it lands upstream, together with the dependencies. > > Sure, will do that. > Just FYI, This patch along with required tools sysreg patches are merged in applicable stable branches which are now available in v6.12.25 and v6.14.4 respectively.
