diff mbox series

[RFC,12/13] cxl: preclude device memory to be used for dax

Message ID 20240516081202.27023-13-alucerop@amd.com
State New, archived
Headers show
Series RFC: add Type2 device support | expand

Commit Message

Alejandro Lucero Palau May 16, 2024, 8:12 a.m. UTC 
From: Alejandro Lucero <alucerop@amd.com>

By definition a type2 cxl device will use the host managed memory for
specific functionality, therefore it should not be available to other
uses.

Signed-off-by: Alejandro Lucero <alucerop@amd.com>
---
 drivers/cxl/core/region.c | 3 +++
 1 file changed, 3 insertions(+)
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Patch

diff --git a/drivers/cxl/core/region.c b/drivers/cxl/core/region.c
index 014684ff4343..0716c2b8d456 100644
--- a/drivers/cxl/core/region.c
+++ b/drivers/cxl/core/region.c
@@ -3485,6 +3485,9 @@  static int cxl_region_probe(struct device *dev)
 	case CXL_DECODER_PMEM:
 		return devm_cxl_add_pmem_region(cxlr);
 	case CXL_DECODER_RAM:
+		if (cxlr->type != CXL_DECODER_HOSTONLYMEM)
+			return 0;
+
 		/*
 		 * The region can not be manged by CXL if any portion of
 		 * it is already online as 'System RAM'