diff options
| author | Dan Williams <dan.j.williams@intel.com> | 2023-02-10 12:07:19 +0300 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2023-02-11 04:33:45 +0300 |
| commit | 09d09e04d2fcf88c4620dd28097e0e2a8f720eac (patch) | |
| tree | 21a7e381b6640bd12821f05fa9aa52f0dfb41cfd /MAINTAINERS | |
| parent | e9ee9fe3a9d4ae0e1e935fc2ec1218b66a043cae (diff) | |
| download | linux-09d09e04d2fcf88c4620dd28097e0e2a8f720eac.tar.xz | |
cxl/dax: Create dax devices for CXL RAM regions
While platform firmware takes some responsibility for mapping the RAM
capacity of CXL devices present at boot, the OS is responsible for
mapping the remainder and hot-added devices. Platform firmware is also
responsible for identifying the platform general purpose memory pool,
typically DDR attached DRAM, and arranging for the remainder to be 'Soft
Reserved'. That reservation allows the CXL subsystem to route the memory
to core-mm via memory-hotplug (dax_kmem), or leave it for dedicated
access (device-dax).
The new 'struct cxl_dax_region' object allows for a CXL memory resource
(region) to be published, but also allow for udev and module policy to
act on that event. It also prevents cxl_core.ko from having a module
loading dependency on any drivers/dax/ modules.
Tested-by: Fan Ni <fan.ni@samsung.com>
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Link: https://lore.kernel.org/r/167602003896.1924368.10335442077318970468.stgit@dwillia2-xfh.jf.intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'MAINTAINERS')
| -rw-r--r-- | MAINTAINERS | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/MAINTAINERS b/MAINTAINERS index 7f86d02cb427..73a9f3401e0e 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -6035,6 +6035,7 @@ M: Dan Williams <dan.j.williams@intel.com> M: Vishal Verma <vishal.l.verma@intel.com> M: Dave Jiang <dave.jiang@intel.com> L: nvdimm@lists.linux.dev +L: linux-cxl@vger.kernel.org S: Supported F: drivers/dax/ |