The recent addition of CXL Region setup to the 6.0-rc1 Linux kernel
has allowed us to test a few paths that weren't exercised fully until
now. That threw up a mixture of bugs in QEMU emulation and the kernel
(kernel fixes already posted).
The first patch is down to a wrong assumption about RO MemoryRegions
and was hit due to a kernel bug overruning the mailbox and into
another register region. Kernel bug fix:
https://lore.kernel.org/linux-cxl/20220815154044.24733-1-Jonathan.Cameron@huawei.com
The later 2 have shown up because the Get / Set LSA commands
have started getting proper user in the kernel.
With these fixes in place I've tested an 8 way interleave on a host
bridge to directly connected CXL devices and zeroed LSA regions.
On that we can bring up a CXL region on which we can create an
fsdax namespace and make a filesystem. For now, the cookie used
to identify device for re establishing that region/namespace will
be 0. A new feature patch will follow that will add the ability
to provide the necessary serial numbers for correct namespace
cookie creation allowing the namespace/filesystem to be remounted
after a full restart.
Jonathan Cameron (3):
hw/cxl: Add stub write function for RO MemoryRegionOps entries.
hw/cxl: Fix Get LSA input payload size which should be 8 bytes.
hw/cxl: Correctly handle variable sized mailbox input payloads.
hw/cxl/cxl-device-utils.c | 12 +++++++++---
hw/cxl/cxl-mailbox-utils.c | 4 ++--
2 files changed, 11 insertions(+), 5 deletions(-)
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2.32.0