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authorIra Weiny <ira.weiny@intel.com>2022-09-26 14:57:11 -0700
committerDan Williams <dan.j.williams@intel.com>2022-11-14 10:07:22 -0800
commit487d828d751d90cf9ca594f45b02dd0e0d712b64 (patch)
treefb83694896b6a27fa0fc2448a6044e041b470269 /lib/Kconfig
parent278294798ac9118412c9624a801d3f20f2279363 (diff)
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cxl/doe: Request exclusive DOE access
The PCIE Data Object Exchange (DOE) mailbox is a protocol run over configuration cycles. It assumes one initiator at a time. While the kernel has control of the mailbox user space writes could interfere with the kernel access. Mark DOE mailbox config space exclusive when iterated by the CXL driver. Signed-off-by: Ira Weiny <ira.weiny@intel.com> Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Link: https://lore.kernel.org/r/20220926215711.2893286-3-ira.weiny@intel.com Signed-off-by: Dan Williams <dan.j.williams@intel.com>
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