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authorPeter Maydell <peter.maydell@linaro.org>2018-07-09 13:45:35 +0100
committerPeter Maydell <peter.maydell@linaro.org>2018-07-10 10:54:40 +0100
commit2b83714d4ea659899069a4b94aa2dfadc847a013 (patch)
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parent3a340e84375145fa32ce68e0b7b58d964487336b (diff)
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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
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