b7628c7973
As long as we had purely EL1 VMs, we could easily update the number of guest-visible counters by letting userspace write to PMCR_EL0.N. With VMs started at EL2, PMCR_EL1.N only reflects MDCR_EL2.HPMN, and we don't have a good way to limit it. For this purpose, introduce a new PMUv3 attribute that allows limiting the maximum number of counters. This requires the explicit selection of a PMU. Suggested-by: Oliver Upton <oliver.upton@linux.dev> Reviewed-by: Oliver Upton <oliver.upton@linux.dev> Signed-off-by: Marc Zyngier <maz@kernel.org> |
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| .. | ||
| auxvec.h | ||
| bitsperlong.h | ||
| bpf_perf_event.h | ||
| byteorder.h | ||
| fcntl.h | ||
| hwcap.h | ||
| Kbuild | ||
| kvm.h | ||
| mman.h | ||
| param.h | ||
| perf_regs.h | ||
| posix_types.h | ||
| ptrace.h | ||
| setup.h | ||
| sigcontext.h | ||
| signal.h | ||
| statfs.h | ||
| sve_context.h | ||
| ucontext.h | ||
| unistd.h | ||