qemu-patch-raspberry4/accel
Peter Maydell 04e3aabde3 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>
2017-09-04 15:21:55 +01:00
..
kvm kvm: remove hard dependency on pci 2017-08-30 18:23:25 +02:00
stubs ARM: KVM: Enable in-kernel timers with user space gic 2017-07-11 11:21:26 +01:00
tcg cputlb: Support generating CPU exceptions on memory transaction failures 2017-09-04 15:21:55 +01:00
accel.c accel: cleanup error output 2017-08-01 17:27:33 +02:00
Makefile.objs tcg: add the CONFIG_TCG into Makefiles 2017-07-05 09:12:44 +02:00