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authorPeter Maydell <peter.maydell@linaro.org>2017-09-04 15:21:55 +0100
committerPeter Maydell <peter.maydell@linaro.org>2017-09-04 15:21:55 +0100
commit04e3aabde397e7abc78ba1ce6cbd144d5fbb1722 (patch)
treebdf47977741bda0a87c10cd182bf896da8d95f35 /target/arm
parent0dff0939f6fc6a7abd966d4295f06a06d7a01df9 (diff)
cputlb: Support generating CPU exceptions on memory transaction failures
Call the new cpu_transaction_failed() hook at the places where CPU generated code interacts with the memory system: io_readx() io_writex() get_page_addr_code() Any access from C code (eg via cpu_physical_memory_rw(), address_space_rw(), ld/st_*_phys()) will *not* trigger CPU exceptions via cpu_transaction_failed(). Handling for transactions failures for this kind of call should be done by using a function which returns a MemTxResult and treating the failure case appropriately in the calling code. In an ideal world we would not generate CPU exceptions for instruction fetch failures in get_page_addr_code() but instead wait until the code translation process tried a load and it failed; however that change would require too great a restructuring and redesign to attempt at this point. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Diffstat (limited to 'target/arm')
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