From f148bb792311fc16fbdc470dd446870a1322b937 Mon Sep 17 00:00:00 2001
From: Mengting Lu <lumengting.lmt@alibaba-inc.com>
Date: Mon, 8 Dec 2025 11:00:04 +0800
Subject: [PATCH] anolis: driver/cxl: enable DSA Poison reporting support for
 AliSCM devices

ANBZ: #27535

When the DSA accesses the poison in the AliSCM, a SIGBUS signal is needed to report to the user thread, which is not supported on the GNR.
This is custom support for AliSCM devices.

Signed-off-by: Mengting Lu <lumengting.lmt@alibaba-inc.com>
---
 drivers/cxl/core/mbox.c | 10 ++++++++++
 drivers/cxl/cxlmem.h    |  2 --
 drivers/cxl/cxlpci.h    | 37 +++++++++++++++++++++++++++++++++++++
 drivers/cxl/pci.c       | 35 -----------------------------------
 4 files changed, 47 insertions(+), 37 deletions(-)

diff --git a/drivers/cxl/core/mbox.c b/drivers/cxl/core/mbox.c
index 8f512d59da73..d7e19b511553 100644
--- a/drivers/cxl/core/mbox.c
+++ b/drivers/cxl/core/mbox.c
@@ -919,6 +919,16 @@ void cxl_event_trace_record(const struct cxl_memdev *cxlmd,
 					evt->gen_media.type,
 					evt->gen_media.transaction_type);
 
+			// Enable DSA Poison reporting support for AliSCM devices
+			struct pci_dev *pdev = to_pci_dev(cxlds->dev);
+
+			if (cxl_pci_quirk_lookup(pdev, cxl_quirk_list)) {
+				u64 pfn = PHYS_PFN(hpa);
+
+				if (pfn_valid(pfn))
+					memory_failure_queue(pfn, MF_MUST_KILL|MF_ACTION_REQUIRED);
+			}
+
 			trace_cxl_general_media(cxlmd, type, cxlr, hpa,
 						&evt->gen_media);
 		} else if (event_type == CXL_CPER_EVENT_DRAM) {
diff --git a/drivers/cxl/cxlmem.h b/drivers/cxl/cxlmem.h
index 9c4f94e3a1c9..f690f17b07aa 100644
--- a/drivers/cxl/cxlmem.h
+++ b/drivers/cxl/cxlmem.h
@@ -873,6 +873,4 @@ struct seq_file;
 struct dentry *cxl_debugfs_create_dir(const char *dir);
 void cxl_dpa_debug(struct seq_file *file, struct cxl_dev_state *cxlds);
 
-#define PCI_VENDOR_ID_ALISCM		0x2042
-
 #endif /* __CXL_MEM_H__ */
diff --git a/drivers/cxl/cxlpci.h b/drivers/cxl/cxlpci.h
index 0fa4799ea316..c7f611929e38 100644
--- a/drivers/cxl/cxlpci.h
+++ b/drivers/cxl/cxlpci.h
@@ -93,4 +93,41 @@ void read_cdat_data(struct cxl_port *port);
 void cxl_cor_error_detected(struct pci_dev *pdev);
 pci_ers_result_t cxl_error_detected(struct pci_dev *pdev,
 				    pci_channel_state_t state);
+
+#define PCI_VENDOR_ID_ALISCM		0x2042
+
+struct cxl_pci_quirk {
+	u16 vendor;
+	u16 device;
+};
+
+static const struct cxl_pci_quirk cxl_quirk_list[] = {
+	{ 0x2042, 0x0ddb}, /* aliscm1.0 */
+	{ } /* END */
+};
+
+static inline const struct cxl_pci_quirk *
+cxl_pci_quirk_lookup_id(u16 vendor, u16 device,
+			const struct cxl_pci_quirk *list)
+{
+	const struct cxl_pci_quirk *q;
+
+	for (q = list; q->vendor || q->device; q++) {
+		if (q->vendor != vendor)
+			continue;
+		if (!q->device || device == q->device)
+			return q;
+	}
+	return NULL;
+}
+
+static inline const struct cxl_pci_quirk *
+cxl_pci_quirk_lookup(struct pci_dev *pci, const struct cxl_pci_quirk *list)
+{
+	if (!pci)
+		return NULL;
+	return cxl_pci_quirk_lookup_id(pci->vendor,
+				       pci->device,
+				       list);
+}
 #endif /* __CXL_PCI_H__ */
diff --git a/drivers/cxl/pci.c b/drivers/cxl/pci.c
index 2968c8b9fd30..ce92ed4946fd 100644
--- a/drivers/cxl/pci.c
+++ b/drivers/cxl/pci.c
@@ -197,41 +197,6 @@ static void cxl_mbox_scan_media_work(struct work_struct *work)
 	mutex_unlock(&mds->mbox_mutex);
 }
 
-struct cxl_pci_quirk {
-	u16 vendor;
-	u16 device;
-};
-
-static const struct cxl_pci_quirk cxl_quirk_list[] = {
-	{ 0x2042, 0x0ddb}, /* aliscm1.0 */
-	{ } /* END */
-};
-
-const struct cxl_pci_quirk *
-cxl_pci_quirk_lookup_id(u16 vendor, u16 device,
-			const struct cxl_pci_quirk *list)
-{
-	const struct cxl_pci_quirk *q;
-
-	for (q = list; q->vendor || q->device; q++) {
-		if (q->vendor != vendor)
-			continue;
-		if (!q->device || device == q->device)
-			return q;
-	}
-	return NULL;
-}
-
-const struct cxl_pci_quirk *
-cxl_pci_quirk_lookup(struct pci_dev *pci, const struct cxl_pci_quirk *list)
-{
-	if (!pci)
-		return NULL;
-	return cxl_pci_quirk_lookup_id(pci->vendor,
-				       pci->device,
-				       list);
-}
-
 /**
  * __cxl_pci_mbox_send_cmd() - Execute a mailbox command
  * @mds: The memory device driver data
-- 
Gitee