diff options
| author | KONRAD Frederic <fred.konrad@greensocs.com> | 2016-10-19 15:06:49 +0200 |
|---|---|---|
| committer | Edgar E. Iglesias <edgar.iglesias@xilinx.com> | 2017-06-27 15:09:15 +0200 |
| commit | c93567463532f46f7c860fc6b431566b71adbd6b (patch) | |
| tree | 78bce090046159a6a2c619c2b818493520a4f224 /accel/tcg/cputlb.c | |
| parent | 7cc2298c46a6afa4f4ff7e5cd262809c782d701b (diff) | |
| download | qemu-c93567463532f46f7c860fc6b431566b71adbd6b.tar.gz | |
exec: allow to get a pointer for some mmio memory region
This introduces a special callback which allows to run code from some MMIO
devices.
SysBusDevice with a MemoryRegion which implements the request_ptr callback will
be notified when the guest try to execute code from their offset. Then it will
be able to eg: pre-load some code from an SPI device or ask a pointer from an
external simulator, etc..
When the pointer or the data in it are no longer valid the device has to
invalidate it.
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Signed-off-by: KONRAD Frederic <fred.konrad@greensocs.com>
Signed-off-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Diffstat (limited to 'accel/tcg/cputlb.c')
| -rw-r--r-- | accel/tcg/cputlb.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/accel/tcg/cputlb.c b/accel/tcg/cputlb.c index 95265a01ec..1900936038 100644 --- a/accel/tcg/cputlb.c +++ b/accel/tcg/cputlb.c @@ -858,6 +858,16 @@ tb_page_addr_t get_page_addr_code(CPUArchState *env, target_ulong addr) pd = iotlbentry->addr & ~TARGET_PAGE_MASK; mr = iotlb_to_region(cpu, pd, iotlbentry->attrs); if (memory_region_is_unassigned(mr)) { + qemu_mutex_lock_iothread(); + if (memory_region_request_mmio_ptr(mr, addr)) { + qemu_mutex_unlock_iothread(); + /* A MemoryRegion is potentially added so re-run the + * get_page_addr_code. + */ + return get_page_addr_code(env, addr); + } + qemu_mutex_unlock_iothread(); + cpu_unassigned_access(cpu, addr, false, true, 0, 4); /* The CPU's unassigned access hook might have longjumped out * with an exception. If it didn't (or there was no hook) then |