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c35dd83866
Commitefad60e460("KVM: arm64: Initialize PMSCR_EL1 when in VHE") does not perform sufficient check before initializing PMSCR_EL1 to 0 when running in VHE mode. On some platforms, this causes the system to hang during boot, as EL3 has not delegated access to the Profiling Buffer to the Non-secure world, nor does it reinject an UNDEF on sysreg trap. To avoid this issue, restrict the PMSCR_EL1 initialization to CPUs that support Statistical Profiling Extension (FEAT_SPE) and have the Profiling Buffer accessible in Non-secure EL1. This is determined via a new helper `cpu_has_spe()` which checks both PMSVer and PMBIDR_EL1.P. This ensures the initialization only affects CPUs where SPE is implemented and usable, preventing boot failures on platforms where SPE is not properly configured. Fixes:efad60e460("KVM: arm64: Initialize PMSCR_EL1 when in VHE") Signed-off-by: Mukesh Ojha <mukesh.ojha@oss.qualcomm.com> Signed-off-by: Marc Zyngier <maz@kernel.org>
290 lines
8.2 KiB
290 lines
8.2 KiB