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.
