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-rw-r--r--drivers/misc/cxl/cxl.h7
-rw-r--r--drivers/misc/cxl/pci.c2
2 files changed, 8 insertions, 1 deletions
diff --git a/drivers/misc/cxl/cxl.h b/drivers/misc/cxl/cxl.h
index 28078f8894a5..0df04380bfd6 100644
--- a/drivers/misc/cxl/cxl.h
+++ b/drivers/misc/cxl/cxl.h
@@ -287,6 +287,13 @@ static const cxl_p2n_reg_t CXL_PSL_WED_An = {0x0A0};
#define CXL_PE_SOFTWARE_STATE_S (1ul << (31 - 30)) /* Suspend */
#define CXL_PE_SOFTWARE_STATE_T (1ul << (31 - 31)) /* Terminate */
+/****** CXL_PSL_RXCTL_An (Implementation Specific) **************************
+ * Controls AFU Hang Pulse, which sets the timeout for the AFU to respond to
+ * the PSL for any response (except MMIO). Timeouts will occur between 1x to 2x
+ * of the hang pulse frequency.
+ */
+#define CXL_PSL_RXCTL_AFUHP_4S 0x7000000000000000ULL
+
/* SPA->sw_command_status */
#define CXL_SPA_SW_CMD_MASK 0xffff000000000000ULL
#define CXL_SPA_SW_CMD_TERMINATE 0x0001000000000000ULL
diff --git a/drivers/misc/cxl/pci.c b/drivers/misc/cxl/pci.c
index 0f2cc9f8b4db..2ccd0a91d486 100644
--- a/drivers/misc/cxl/pci.c
+++ b/drivers/misc/cxl/pci.c
@@ -348,7 +348,7 @@ static int init_implementation_afu_regs(struct cxl_afu *afu)
cxl_p1n_write(afu, CXL_PSL_COALLOC_A, 0xFF000000FEFEFEFEULL);
/* for debugging with trace arrays */
cxl_p1n_write(afu, CXL_PSL_SLICE_TRACE, 0x0000FFFF00000000ULL);
- cxl_p1n_write(afu, CXL_PSL_RXCTL_A, 0xF000000000000000ULL);
+ cxl_p1n_write(afu, CXL_PSL_RXCTL_A, CXL_PSL_RXCTL_AFUHP_4S);
return 0;
}