On Wed, Dec 13, 2023 at 03:02:52PM +0800, Yu Chien Peter Lin wrote: > The custom PMU extension aims to support perf event sampling prior > to the ratification of Sscofpmf. Instead of diverting the bits and > register reserved for future standard, a set of custom registers is > added. Hence, we may consider it as a CPU feature rather than an > erratum. > > T-Head cores need to append "xtheadpmu" to the riscv,isa-extensions > for each cpu node in device tree, and enable CONFIG_THEAD_CUSTOM_PMU > for proper functioning as of this commit. > > Signed-off-by: Yu Chien Peter Lin <peterlin@xxxxxxxxxxxxx> > Reviewed-by: Guo Ren <guoren@xxxxxxxxxx> Reviewed-by: Conor Dooley <conor.dooley@xxxxxxxxxxxxx> Cheers, Conor.
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