1ea5afd42a
A number of architecture ports are obsolete and getting dropped, so we no longer want to track the respective features. We already removed the lines for metag and mn10300, this does the same edits for all the others. For the remaining 21 architectures, this shows how many are known to implement each given feature: 19 time/modern-timekeeping/arch-support.txt 19 time/clockevents/arch-support.txt 15 core/tracehook/arch-support.txt 14 core/generic-idle-thread/arch-support.txt 13 locking/lockdep/arch-support.txt 12 io/dma-api-debug/arch-support.txt 11 debug/kgdb/arch-support.txt 10 time/virt-cpuacct/arch-support.txt 9 debug/kretprobes/arch-support.txt 9 debug/kprobes/arch-support.txt 8 vm/THP/arch-support.txt 8 vm/pte_special/arch-support.txt 8 vm/numa-memblock/arch-support.txt 8 io/sg-chain/arch-support.txt 7 perf/kprobes-event/arch-support.txt 7 locking/rwsem-optimized/arch-support.txt 7 debug/gcov-profile-all/arch-support.txt 7 core/jump-labels/arch-support.txt 7 core/BPF-JIT/arch-support.txt 6 vm/ELF-ASLR/arch-support.txt 6 time/context-tracking/arch-support.txt 6 seccomp/seccomp-filter/arch-support.txt 6 debug/stackprotector/arch-support.txt 5 time/irq-time-acct/arch-support.txt 5 io/dma-contiguous/arch-support.txt 5 debug/uprobes/arch-support.txt 4 vm/ioremap_prot/arch-support.txt 4 time/arch-tick-broadcast/arch-support.txt 4 perf/perf-stackdump/arch-support.txt 4 perf/perf-regs/arch-support.txt 3 debug/KASAN/arch-support.txt 2 vm/PG_uncached/arch-support.txt 2 vm/huge-vmap/arch-support.txt 2 sched/numa-balancing/arch-support.txt 2 sched/membarrier-sync-core/arch-support.txt 2 locking/cmpxchg-local/arch-support.txt 2 debug/optprobes/arch-support.txt 2 debug/kprobes-on-ftrace/arch-support.txt 1 vm/TLB/arch-support.txt 1 locking/queued-spinlocks/arch-support.txt 1 locking/queued-rwlocks/arch-support.txt 1 debug/user-ret-profiler/arch-support.txt 0 lib/strncasecmp/arch-support.txt Note that the list does not include riscv or nds32 yet, these still need to be added. Signed-off-by: Arnd Bergmann <arnd@arndb.de>
55 lines
1.8 KiB
Plaintext
55 lines
1.8 KiB
Plaintext
#
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# Feature name: membarrier-sync-core
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# Kconfig: ARCH_HAS_MEMBARRIER_SYNC_CORE
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# description: arch supports core serializing membarrier
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#
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# Architecture requirements
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#
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# * arm64
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#
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# Rely on eret context synchronization when returning from IPI handler, and
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# when returning to user-space.
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#
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# * x86
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#
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# x86-32 uses IRET as return from interrupt, which takes care of the IPI.
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# However, it uses both IRET and SYSEXIT to go back to user-space. The IRET
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# instruction is core serializing, but not SYSEXIT.
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#
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# x86-64 uses IRET as return from interrupt, which takes care of the IPI.
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# However, it can return to user-space through either SYSRETL (compat code),
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# SYSRETQ, or IRET.
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#
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# Given that neither SYSRET{L,Q}, nor SYSEXIT, are core serializing, we rely
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# instead on write_cr3() performed by switch_mm() to provide core serialization
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# after changing the current mm, and deal with the special case of kthread ->
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# uthread (temporarily keeping current mm into active_mm) by issuing a
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# sync_core_before_usermode() in that specific case.
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#
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-----------------------
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| arch |status|
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-----------------------
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| alpha: | TODO |
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| arc: | TODO |
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| arm: | TODO |
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| arm64: | ok |
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| c6x: | TODO |
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| h8300: | TODO |
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| hexagon: | TODO |
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| ia64: | TODO |
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| m68k: | TODO |
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| microblaze: | TODO |
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| mips: | TODO |
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| nios2: | TODO |
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| openrisc: | TODO |
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| parisc: | TODO |
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| powerpc: | TODO |
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| s390: | TODO |
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| sh: | TODO |
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| sparc: | TODO |
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| um: | TODO |
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| unicore32: | TODO |
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| x86: | ok |
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| xtensa: | TODO |
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