diff options
author | Peter Maydell <peter.maydell@linaro.org> | 2018-07-09 13:45:35 +0100 |
---|---|---|
committer | Peter Maydell <peter.maydell@linaro.org> | 2018-07-10 10:54:40 +0100 |
commit | 2b83714d4ea659899069a4b94aa2dfadc847a013 (patch) | |
tree | 08c6699e8b22ece28fc957c3fb68eaabc28048c4 /block/io.c | |
parent | 3a340e84375145fa32ce68e0b7b58d964487336b (diff) | |
download | qemu-2b83714d4ea659899069a4b94aa2dfadc847a013.zip qemu-2b83714d4ea659899069a4b94aa2dfadc847a013.tar.gz qemu-2b83714d4ea659899069a4b94aa2dfadc847a013.tar.bz2 |
target/arm: Use correct mmu_idx for exception-return unstacking
For M-profile exception returns, the mmu index to use for exception
return unstacking is supposed to be that of wherever we are returning to:
* if returning to handler mode, privileged
* if returning to thread mode, privileged or unprivileged depending on
CONTROL.nPRIV for the destination security state
We were passing the wrong thing as the 'priv' argument to
arm_v7m_mmu_idx_for_secstate_and_priv(). The effect was that guests
which programmed the MPU to behave differently for privileged and
unprivileged code could get spurious MemManage Unstack exceptions.
Reported-by: Adithya Baglody <adithya.nagaraj.baglody@intel.com>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20180709124535.1116-1-peter.maydell@linaro.org
Diffstat (limited to 'block/io.c')
0 files changed, 0 insertions, 0 deletions