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linux-user/aarch64: Reset target data on MADV_DONTNEED

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aarch64 stores MTE tags in target_date, and they should be reset by
MADV_DONTNEED.

Signed-off-by: Vitaly Buka <vitalybuka@google.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20220711220028.2467290-1-vitalybuka@google.com>
[lv: fix code style issues]
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
This commit is contained in:
Vitaly Buka 2022-07-11 15:00:28 -07:00 • committed by Laurent Vivier
parent a6b1c53e79
commit dbbf89751b
3 changed files with 30 additions and 0 deletions
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3
linux-user/mmap.c
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@ -894,6 +894,9 @@ abi_long target_madvise(abi_ulong start, abi_ulong len_in, int advice)
if (advice == MADV_DONTNEED &&
can_passthrough_madv_dontneed(start, end)) {
ret = get_errno(madvise(g2h_untagged(start), len, MADV_DONTNEED));
if (ret == 0) {
page_reset_target_data(start, start + len);
}
}
mmap_unlock();