diff options
| author | Richard Henderson <richard.henderson@linaro.org> | 2021-04-06 10:40:20 -0700 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2021-04-12 11:06:24 +0100 |
| commit | eb42297a59e103500bdd2c352c5b52f54b1c33cd (patch) | |
| tree | af7603fdfa104013fc2ef405f69533c996c55df5 /tests/tcg/aarch64/mte.h | |
| parent | 017a913af4dff47ac5e62be613b9f8b88fc8fa96 (diff) | |
accel/tcg: Preserve PAGE_ANON when changing page permissions
Using mprotect() to change PROT_* does not change the MAP_ANON
previously set with mmap(). Our linux-user version of MTE only
works with MAP_ANON pages, so losing PAGE_ANON caused MTE to
stop working.
Reported-by: Stephen Long <steplong@quicinc.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Tested-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Diffstat (limited to 'tests/tcg/aarch64/mte.h')
| -rw-r--r-- | tests/tcg/aarch64/mte.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/tests/tcg/aarch64/mte.h b/tests/tcg/aarch64/mte.h index 141cef522c..0805676b11 100644 --- a/tests/tcg/aarch64/mte.h +++ b/tests/tcg/aarch64/mte.h @@ -48,7 +48,8 @@ static void enable_mte(int tcf) } } -static void *alloc_mte_mem(size_t size) +static void * alloc_mte_mem(size_t size) __attribute__((unused)); +static void * alloc_mte_mem(size_t size) { void *p = mmap(NULL, size, PROT_READ | PROT_WRITE | PROT_MTE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); |