On 03.03.21 22:36, Richard Henderson wrote:
On 3/3/21 1:22 PM, David Hildenbrand wrote:
Am 03.03.2021 um 22:19 schrieb Richard Henderson <richard.hender...@linaro.org>:
On 3/3/21 1:11 PM, David Hildenbrand wrote:
MMIO on s390x? :)
hw/s390x/s390-pci-bus.c, memory_region_init_io*().
... part of system address space where a CPU could stumble over it?
Impossible to tell within 3 layers of object wrappers. :-(
I suppose I have no idea how "pci" was hacked onto s390x.
You've used the right words to describe "pci" (!) on s390x.
IIRC, there is no MMIO: configuration space accesses etc. are performed
using special access instructions - which will "emulate" the MMIO access
performed on other archs via simple read/write instructions.
Ordinary instructions (e.g., mvpg) that operate on the system address
space should never stumble over MMIO regions - because that concept does
not exist on s390x.
--
Thanks,
David / dhildenb
