diff options
| author | Emilio G. Cota <cota@braap.org> | 2017-07-26 20:22:51 -0400 |
|---|---|---|
| committer | Richard Henderson <richard.henderson@linaro.org> | 2018-06-15 07:42:55 -1000 |
| commit | 0b5c91f74f3c83a36f37740969df8c775c997e69 (patch) | |
| tree | b40f7bcd0f1ff33f63a59c9e6f2112a12b55ef4e /accel/tcg/translate-all.h | |
| parent | 45c73de594414904b0d6a7ade70fb4514d35f79c (diff) | |
translate-all: use per-page locking in !user-mode
Groundwork for supporting parallel TCG generation.
Instead of using a global lock (tb_lock) to protect changes
to pages, use fine-grained, per-page locks in !user-mode.
User-mode stays with mmap_lock.
Sometimes changes need to happen atomically on more than one
page (e.g. when a TB that spans across two pages is
added/invalidated, or when a range of pages is invalidated).
We therefore introduce struct page_collection, which helps
us keep track of a set of pages that have been locked in
the appropriate locking order (i.e. by ascending page index).
This commit first introduces the structs and the function helpers,
to then convert the calling code to use per-page locking. Note
that tb_lock is not removed yet.
While at it, rename tb_alloc_page to tb_page_add, which pairs with
tb_page_remove.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Emilio G. Cota <cota@braap.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Diffstat (limited to 'accel/tcg/translate-all.h')
| -rw-r--r-- | accel/tcg/translate-all.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/accel/tcg/translate-all.h b/accel/tcg/translate-all.h index ba8e4d63c4..6d1d2588b5 100644 --- a/accel/tcg/translate-all.h +++ b/accel/tcg/translate-all.h @@ -23,6 +23,9 @@ /* translate-all.c */ +struct page_collection *page_collection_lock(tb_page_addr_t start, + tb_page_addr_t end); +void page_collection_unlock(struct page_collection *set); void tb_invalidate_phys_page_fast(tb_page_addr_t start, int len); void tb_invalidate_phys_page_range(tb_page_addr_t start, tb_page_addr_t end, int is_cpu_write_access); |