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authorDan Williams <dan.j.williams@intel.com>2022-04-25 21:43:44 +0300
committerDan Williams <dan.j.williams@intel.com>2022-07-25 22:18:06 +0300
commit23a22cd1c98be518774fe7f7e8a5203af050525a (patch)
tree023f45987cce6345b543ac60ecdb32654735a1db /drivers/cxl/Kconfig
parent80d10a6cee05029cae9d9d6e8ddb799ea6d01e0c (diff)
downloadlinux-23a22cd1c98be518774fe7f7e8a5203af050525a.tar.xz
cxl/region: Allocate HPA capacity to regions
After a region's interleave parameters (ways and granularity) are set, add a way for regions to allocate HPA (host physical address space) from the free capacity in their parent root-decoder. The allocator for this capacity reuses the 'struct resource' based allocator used for CONFIG_DEVICE_PRIVATE. Once the tuple of "ways, granularity, [uuid], and size" is set the region configuration transitions to the CXL_CONFIG_INTERLEAVE_ACTIVE state which is a precursor to allowing endpoint decoders to be added to a region. Co-developed-by: Ben Widawsky <bwidawsk@kernel.org> Signed-off-by: Ben Widawsky <bwidawsk@kernel.org> Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Link: https://lore.kernel.org/r/165784335630.1758207.420216490941955417.stgit@dwillia2-xfh.jf.intel.com Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/cxl/Kconfig')
-rw-r--r--drivers/cxl/Kconfig3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/cxl/Kconfig b/drivers/cxl/Kconfig
index 184fdd4b8871..768ced3d6fe8 100644
--- a/drivers/cxl/Kconfig
+++ b/drivers/cxl/Kconfig
@@ -106,6 +106,9 @@ config CXL_SUSPEND
config CXL_REGION
bool
default CXL_BUS
+ # For MAX_PHYSMEM_BITS
+ depends on SPARSEMEM
select MEMREGION
+ select GET_FREE_REGION
endif