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The mmio path (see exec.c:prepare_mmio_access) already protects itself against recursive locking and it makes sense to do the same for io_readx/writex. Otherwise any helper running in the BQL context will assert when it attempts to write to device memory as in the case of the bug report. Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> CC: Richard Jones <rjones@redhat.com> CC: Paolo Bonzini <bonzini@gnu.org> CC: qemu-stable@nongnu.org Message-Id: <20170921110625.9500-1-alex.bennee@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> |
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