Hello Zhi,
On 9/21/24 09:14, Zhi Wang wrote:
Compute Express Link (CXL) is an open standard interconnect built upon
industrial PCI layers to enhance the performance and efficiency of data
centers by enabling high-speed, low-latency communication between CPUs
and various types of devices such as accelerators, memory.
Although CXL is built upon the PCI layers, passing a CXL type-2 device can
be different than PCI devices according to CXL specification. Thus,
addtional changes on are required.
vfio-cxl is introduced to support the CXL type-2 device passthrough.
This is the QEMU VFIOStub draft changes to support it.
More details (patches, repos, kernel config) all what you need to test
and hack around, plus a demo video shows the kernel/QEMU command line
can be found at:
https://lore.kernel.org/kvm/20240920223446.1908673-7-z...@nvidia.com/T/
I have started looking at the software stack and the QEMU trees
are quite old. Could you please rebase the branches on the latest ?
Also, I think having a single branch per project would be easier.
For linux :
[v2] cxl: add Type2 device support
[RFC] vfio: introduce vfio-cxl to support CXL type-2
[RFC] samples: introduce QEMU CXL accel driver
Same for QEMU.
Thanks,
C.
Zhi Wang (1):
vfio: support CXL device in VFIO stub
hw/vfio/common.c | 3 +
hw/vfio/pci.c | 134 ++++++++++++++++++++++++++++++++++
hw/vfio/pci.h | 10 +++
include/hw/pci/pci.h | 2 +
include/hw/vfio/vfio-common.h | 1 +
linux-headers/linux/vfio.h | 14 ++++
6 files changed, 164 insertions(+)
