Dan Williams 8f0220af58 Revert "cxl/port: Enable the HDM decoder capability for switch ports" ... commit eb0764b822 ("cxl/port: Enable the HDM decoder capability for switch ports") ...was added on the observation of CXL memory not being accessible after setting up a region on a "cold-plugged" device. A "cold-plugged" CXL device is one that was not present at boot, so platform-firmware/BIOS has no chance to set it up. While it is true that the debug found the enable bit clear in the host-bridge's instance of the global control register (CXL 3.0 8.2.4.19.2 CXL HDM Decoder Global Control Register), that bit is described as: "This bit is only applicable to CXL.mem devices and shall return 0 on CXL Host Bridges and Upstream Switch Ports." So it is meant to be zero, and further testing confirmed that this "fix" had no effect on the failure. Revert it, and be more vigilant about proposed fixes in the future. Since the original copied stable@, flag this revert for stable@ as well. Cc: <stable@vger.kernel.org> Fixes: eb0764b822 ("cxl/port: Enable the HDM decoder capability for switch ports") Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Reviewed-by: Dave Jiang <dave.jiang@intel.com> Link: https://lore.kernel.org/r/168685882012.3475336.16733084892658264991.stgit@dwillia2-xfh.jf.intel.com Signed-off-by: Dan Williams <dan.j.williams@intel.com>		2023-06-25 14:32:18 -07:00
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core	Revert "cxl/port: Enable the HDM decoder capability for switch ports"	2023-06-25 14:32:18 -07:00
acpi.c	cxl/port: Rename CXL_DECODER_{EXPANDER, ACCELERATOR} => {HOSTONLYMEM, DEVMEM}	2023-06-25 14:31:08 -07:00
cxl.h	Revert "cxl/port: Enable the HDM decoder capability for switch ports"	2023-06-25 14:32:18 -07:00
cxlmem.h	cxl/memdev: Formalize endpoint port linkage	2023-06-25 14:31:33 -07:00
cxlpci.h	cxl: Wait Memory_Info_Valid before access memory related info	2023-05-18 16:42:41 -07:00
Kconfig	Merge branch 'for-6.3/cxl-ram-region' into cxl/next	2023-02-10 18:11:01 -08:00
Makefile	cxl/pmem: Introduce nvdimm_security_ops with ->get_flags() operation	2022-11-30 16:30:47 -08:00
mem.c	cxl/mbox: Move mailbox related driver state to its own data structure	2023-06-25 14:31:08 -07:00
pci.c	cxl/pci: Unconditionally unmask 256B Flit errors	2023-06-25 14:31:09 -07:00
pmem.c	cxl/mbox: Move mailbox related driver state to its own data structure	2023-06-25 14:31:08 -07:00
port.c	Revert "cxl/port: Enable the HDM decoder capability for switch ports"	2023-06-25 14:32:18 -07:00
security.c	cxl/mbox: Move mailbox related driver state to its own data structure	2023-06-25 14:31:08 -07:00