diff options
| author | Nicholas Piggin <npiggin@gmail.com> | 2024-03-27 00:04:20 +1000 |
|---|---|---|
| committer | Nicholas Piggin <npiggin@gmail.com> | 2024-05-24 08:57:50 +1000 |
| commit | 99cd12ced16d15a1ffde055f842497747f070f91 (patch) | |
| tree | 5f598f3fae2b438cfa06c8560b8a9508c268c350 /docs | |
| parent | 82676f1fc4b1511a5fe32256aaec885d200ffbf6 (diff) | |
tcg/cputlb: Remove non-synced variants of global TLB flushes
These are no longer used.
tlb_flush_all_cpus: removed by previous commit.
tlb_flush_page_all_cpus: removed by previous commit.
tlb_flush_page_bits_by_mmuidx_all_cpus: never used.
tlb_flush_page_by_mmuidx_all_cpus: never used.
tlb_flush_page_bits_by_mmuidx_all_cpus: never used, thus:
tlb_flush_range_by_mmuidx_all_cpus: never used.
tlb_flush_by_mmuidx_all_cpus: never used.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Diffstat (limited to 'docs')
| -rw-r--r-- | docs/devel/multi-thread-tcg.rst | 13 |
1 files changed, 4 insertions, 9 deletions
diff --git a/docs/devel/multi-thread-tcg.rst b/docs/devel/multi-thread-tcg.rst index 1420789fff..d706c27ea7 100644 --- a/docs/devel/multi-thread-tcg.rst +++ b/docs/devel/multi-thread-tcg.rst @@ -205,15 +205,10 @@ DESIGN REQUIREMENTS: (Current solution) -We have updated cputlb.c to defer operations when a cross-vCPU -operation with async_run_on_cpu() which ensures each vCPU sees a -coherent state when it next runs its work (in a few instructions -time). - -A new set up operations (tlb_flush_*_all_cpus) take an additional flag -which when set will force synchronisation by setting the source vCPUs -work as "safe work" and exiting the cpu run loop. This ensure by the -time execution restarts all flush operations have completed. +A new set of tlb flush operations (tlb_flush_*_all_cpus_synced) force +synchronisation by setting the source vCPUs work as "safe work" and +exiting the cpu run loop. This ensures that by the time execution +restarts all flush operations have completed. TLB flag updates are all done atomically and are also protected by the corresponding page lock. |