REG_NOSUPPORT
if (!mask || (mask & (REG_NOSUPPORT | PERF_REG_X86_RESERVED)))
if (!mask || (mask & (REG_NOSUPPORT | PERF_REG_X86_RESERVED)))
#define PERF_REGS_MASK (((1ULL << PERF_REG_X86_64_MAX) - 1) & ~REG_NOSUPPORT)