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1b948d6cae
The zEC12 machines introduced the local-clearing control for the IDTE and IPTE instruction. If the control is set only the TLB of the local CPU is cleared of entries, either all entries of a single address space for IDTE, or the entry for a single page-table entry for IPTE. Without the local-clearing control the TLB flush is broadcasted to all CPUs in the configuration, which is expensive. The reset of the bit mask of the CPUs that need flushing after a non-local IDTE is tricky. As TLB entries for an address space remain in the TLB even if the address space is detached a new bit field is required to keep track of attached CPUs vs. CPUs in the need of a flush. After a non-local flush with IDTE the bit-field of attached CPUs is copied to the bit-field of CPUs in need of a flush. The ordering of operations on cpu_attach_mask, attach_count and mm_cpumask(mm) is such that an underindication in mm_cpumask(mm) is prevented but an overindication in mm_cpumask(mm) is possible. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> |
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| vdso32 | ||
| vdso64 | ||
| .gitignore | ||
| asm-offsets.c | ||
| audit.c | ||
| audit.h | ||
| base.S | ||
| cache.c | ||
| compat_audit.c | ||
| compat_linux.c | ||
| compat_linux.h | ||
| compat_ptrace.h | ||
| compat_signal.c | ||
| compat_wrapper.c | ||
| cpcmd.c | ||
| crash_dump.c | ||
| debug.c | ||
| diag.c | ||
| dis.c | ||
| dumpstack.c | ||
| early.c | ||
| ebcdic.c | ||
| entry64.S | ||
| entry.h | ||
| entry.S | ||
| ftrace.c | ||
| head31.S | ||
| head64.S | ||
| head_kdump.S | ||
| head.S | ||
| ipl.c | ||
| irq.c | ||
| jump_label.c | ||
| kprobes.c | ||
| lgr.c | ||
| machine_kexec.c | ||
| Makefile | ||
| mcount64.S | ||
| mcount.S | ||
| module.c | ||
| nmi.c | ||
| os_info.c | ||
| perf_cpum_cf_events.c | ||
| perf_cpum_cf.c | ||
| perf_cpum_sf.c | ||
| perf_event.c | ||
| pgm_check.S | ||
| process.c | ||
| processor.c | ||
| ptrace.c | ||
| reipl64.S | ||
| reipl.S | ||
| relocate_kernel64.S | ||
| relocate_kernel.S | ||
| runtime_instr.c | ||
| s390_ksyms.c | ||
| sclp.S | ||
| setup.c | ||
| signal.c | ||
| smp.c | ||
| stacktrace.c | ||
| suspend.c | ||
| swsusp_asm64.S | ||
| sys_s390.c | ||
| syscalls.S | ||
| sysinfo.c | ||
| time.c | ||
| topology.c | ||
| traps.c | ||
| vdso.c | ||
| vmlinux.lds.S | ||
| vtime.c | ||