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v6.12.39
linux-yocto/arch/arm64/tools
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Anshuman Khandual 686d8f7b59 arm64/boot: Enable EL2 requirements for FEAT_PMUv3p9 
commit 858c7bfcb3 upstream.

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.

Also update booting.rst with SCR_EL3.FGTEn2 requirement for all FEAT_FGT2
based registers to be accessible in EL2.

Cc: Will Deacon <will@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Rob Herring <robh@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Marc Zyngier <maz@kernel.org>
Cc: Oliver Upton <oliver.upton@linux.dev>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-doc@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: kvmarm@lists.linux.dev
Fixes: 0bbff9ed81 ("perf/arm_pmuv3: Add PMUv3.9 per counter EL0 access control")
Fixes: d8226d8cfb ("perf: arm_pmuv3: Add support for Armv9.4 PMU instruction counter")
Tested-by: Rob Herring (Arm) <robh@kernel.org>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
Link: https://lore.kernel.org/r/20250227035119.2025171-1-anshuman.khandual@arm.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2025-04-25 10:48:04 +02:00
..
cpucaps arm64: cpufeature: add Permission Overlay Extension cpucap 2024-09-04 12:48:52 +01:00
gen-cpucaps.awk arm64: Factor out cpucap definitions 2023-10-16 12:57:45 +01:00
gen-sysreg.awk arm64/sysreg: allow *Enum blocks in SysregFields blocks 2023-04-06 15:28:54 +01:00
Makefile arm64: generate 64-bit syscall.tbl 2024-07-10 14:23:38 +02:00
syscall_32.tbl arm64: convert unistd_32.h to syscall.tbl format 2024-07-10 14:23:38 +02:00
syscall_64.tbl arm64: generate 64-bit syscall.tbl 2024-07-10 14:23:38 +02:00
sysreg arm64/boot: Enable EL2 requirements for FEAT_PMUv3p9 2025-04-25 10:48:04 +02:00