From: Fan Ni <ni...@outlook.com> The patch series provides dynamic capacity device (DCD) emulation in Qemu. More specifically, it provides the following functionalities: 1. Extended type3 memory device to support DC regions and extents. 2. Implemented DCD related mailbox command support in CXL r3.0: 8.2.9.8.9. 3. ADD QMP interfaces for adding and releasing DC extents to simulate FM functions for DCD described in cxl r3.0: 7.6.7.6.5 and 7.6.7.6.6. 4. Add new ct3d properties for DCD devices (host backend, number of dc regions, etc.) 5. Add read/write support from/to DC regions of the device. 6. Add mechanism to validate accessed to DC region address space.
A more detailed description can be found from the previously posted RFC[1]. Compared to the previously posted RFC[1], following changes have been made: 1. Rebased the code on top of Jonathan's branch https://gitlab.com/jic23/qemu/-/tree/cxl-2023-05-25. 2. Extracted the rename of mem_size to a separated patch.(Jonathan) 3. Reordered the patch series to improve its readability.(Jonathan) 4. Split the validation of accesses to DC region address space as a separate patch. 5. Redesigned the QMP interfaces for adding and releasing DC extents to make them easier to understand and act like existing QMP interfaces (like the interface for cxl-inject-uncorrectable-errors). (Jonathan) 6. Updated dvsec range register setting to support DCD devices without static capacity. 7. Fixed other issues mentioned in the comments (Jonathan&Nathan Fontenot). 8. Fixed the format issues and checked with checkpatch.pl under qemu code dir. The code is tested with the DCD patch series at the kernel side[2]. The test is similar to those mentioned in the cover letter of [1]. [1]: https://lore.kernel.org/all/20230511175609.2091136-1-fan...@samsung.com/ [2]: https://lore.kernel.org/linux-cxl/649da378c28a3_968bb29420@iweiny-mobl.notmuch/T/#t Fan Ni (9): hw/cxl/cxl-mailbox-utils: Add dc_event_log_size field to output payload of identify memory device command hw/cxl/cxl-mailbox-utils: Add dynamic capacity region representative and mailbox command support include/hw/cxl/cxl_device: Rename mem_size as static_mem_size for type3 memory devices hw/mem/cxl_type3: Add support to create DC regions to type3 memory devices hw/mem/cxl_type3: Add host backend and address space handling for DC regions hw/mem/cxl_type3: Add DC extent list representative and get DC extent list mailbox support hw/cxl/cxl-mailbox-utils: Add mailbox commands to support add/release dynamic capacity response hw/cxl/events: Add qmp interfaces to add/release dynamic capacity extents hw/mem/cxl_type3: Add dpa range validation for accesses to dc regions hw/cxl/cxl-mailbox-utils.c | 421 +++++++++++++++++++++++++++- hw/mem/cxl_type3.c | 539 +++++++++++++++++++++++++++++++++--- hw/mem/cxl_type3_stubs.c | 6 + include/hw/cxl/cxl_device.h | 49 +++- include/hw/cxl/cxl_events.h | 16 ++ qapi/cxl.json | 49 ++++ 6 files changed, 1034 insertions(+), 46 deletions(-) -- 2.39.2
