diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h
index 9c6a4a980678..07cc9be6f80b 100644
--- a/drivers/pci/pci.h
+++ b/drivers/pci/pci.h
@@ -554,7 +554,8 @@ int aer_get_device_error_info(struct pci_dev *dev, struct aer_err_info *info);
 void aer_print_error(struct pci_dev *dev, struct aer_err_info *info);
 
 int pcie_read_tlp_log(struct pci_dev *dev, int where, int where2,
-		      unsigned int tlp_len, struct pcie_tlp_log *log);
+		      unsigned int tlp_len, bool flit,
+		      struct pcie_tlp_log *log);
 unsigned int aer_tlp_log_len(struct pci_dev *dev, u32 aercc);
 void pcie_print_tlp_log(const struct pci_dev *dev,
 			const struct pcie_tlp_log *log, const char *pfx);
diff --git a/drivers/pci/pcie/aer.c b/drivers/pci/pcie/aer.c
index 508474e17183..9c3e8299ad50 100644
--- a/drivers/pci/pcie/aer.c
+++ b/drivers/pci/pcie/aer.c
@@ -1245,6 +1245,7 @@ int aer_get_device_error_info(struct pci_dev *dev, struct aer_err_info *info)
 			pcie_read_tlp_log(dev, aer + PCI_ERR_HEADER_LOG,
 					  aer + PCI_ERR_PREFIX_LOG,
 					  aer_tlp_log_len(dev, aercc),
+					  aercc & PCI_ERR_CAP_TLP_LOG_FLIT,
 					  &info->tlp);
 		}
 	}
diff --git a/drivers/pci/pcie/dpc.c b/drivers/pci/pcie/dpc.c
index 242cabd5eeeb..df42f15c9829 100644
--- a/drivers/pci/pcie/dpc.c
+++ b/drivers/pci/pcie/dpc.c
@@ -219,7 +219,9 @@ static void dpc_process_rp_pio_error(struct pci_dev *pdev)
 		goto clear_status;
 	pcie_read_tlp_log(pdev, cap + PCI_EXP_DPC_RP_PIO_HEADER_LOG,
 			  cap + PCI_EXP_DPC_RP_PIO_TLPPREFIX_LOG,
-			  dpc_tlp_log_len(pdev), &tlp_log);
+			  dpc_tlp_log_len(pdev),
+			  pdev->subordinate->flit_mode,
+			  &tlp_log);
 	pcie_print_tlp_log(pdev, &tlp_log, dev_fmt(""));
 
 	if (pdev->dpc_rp_log_size < PCIE_STD_NUM_TLP_HEADERLOG + 1)
@@ -398,11 +400,21 @@ void pci_dpc_init(struct pci_dev *pdev)
 
 	/* Quirks may set dpc_rp_log_size if device or firmware is buggy */
 	if (!pdev->dpc_rp_log_size) {
+		u16 flags;
+		int ret;
+
+		ret = pcie_capability_read_word(pdev, PCI_EXP_FLAGS, &flags);
+		if (ret)
+			return;
+
 		pdev->dpc_rp_log_size =
 				FIELD_GET(PCI_EXP_DPC_RP_PIO_LOG_SIZE, cap);
+		if (FIELD_GET(PCI_EXP_FLAGS_FLIT, flags))
+			pdev->dpc_rp_log_size += FIELD_GET(PCI_EXP_DPC_RP_PIO_LOG_SIZE4,
+							   cap) << 4;
+
 		if (pdev->dpc_rp_log_size < PCIE_STD_NUM_TLP_HEADERLOG ||
-		    pdev->dpc_rp_log_size > PCIE_STD_NUM_TLP_HEADERLOG + 1 +
-					    PCIE_STD_MAX_TLP_PREFIXLOG) {
+		    pdev->dpc_rp_log_size > PCIE_STD_MAX_TLP_HEADERLOG + 1) {
 			pci_err(pdev, "RP PIO log size %u is invalid\n",
 				pdev->dpc_rp_log_size);
 			pdev->dpc_rp_log_size = 0;
diff --git a/drivers/pci/pcie/tlp.c b/drivers/pci/pcie/tlp.c
index 0860b5da837f..890d5391d7f5 100644
--- a/drivers/pci/pcie/tlp.c
+++ b/drivers/pci/pcie/tlp.c
@@ -7,6 +7,7 @@
 
 #include <linux/aer.h>
 #include <linux/array_size.h>
+#include <linux/bitfield.h>
 #include <linux/pci.h>
 #include <linux/string.h>
 
@@ -21,6 +22,9 @@
  */
 unsigned int aer_tlp_log_len(struct pci_dev *dev, u32 aercc)
 {
+	if (aercc & PCI_ERR_CAP_TLP_LOG_FLIT)
+		return FIELD_GET(PCI_ERR_CAP_TLP_LOG_SIZE, aercc);
+
 	return PCIE_STD_NUM_TLP_HEADERLOG +
 	       ((aercc & PCI_ERR_CAP_PREFIX_LOG_PRESENT) ?
 		dev->eetlp_prefix_max : 0);
@@ -49,6 +53,7 @@ unsigned int dpc_tlp_log_len(struct pci_dev *dev)
  * @where: PCI Config offset of TLP Header Log
  * @where2: PCI Config offset of TLP Prefix Log
  * @tlp_len: TLP Log length (Header Log + TLP Prefix Log in DWORDs)
+ * @flit: TLP Logged in Flit mode
  * @log: TLP Log structure to fill
  *
  * Fill @log from TLP Header Log registers, e.g., AER or DPC.
@@ -56,28 +61,34 @@ unsigned int dpc_tlp_log_len(struct pci_dev *dev)
  * Return: 0 on success and filled TLP Log structure, <0 on error.
  */
 int pcie_read_tlp_log(struct pci_dev *dev, int where, int where2,
-		      unsigned int tlp_len, struct pcie_tlp_log *log)
+		      unsigned int tlp_len, bool flit, struct pcie_tlp_log *log)
 {
 	unsigned int i;
 	int off, ret;
-	u32 *to;
+
+	if (tlp_len > ARRAY_SIZE(log->dw))
+		tlp_len = ARRAY_SIZE(log->dw);
 
 	memset(log, 0, sizeof(*log));
 
 	for (i = 0; i < tlp_len; i++) {
-		if (i < PCIE_STD_NUM_TLP_HEADERLOG) {
+		if (i < PCIE_STD_NUM_TLP_HEADERLOG)
 			off = where + i * 4;
-			to = &log->dw[i];
-		} else {
+		else
 			off = where2 + (i - PCIE_STD_NUM_TLP_HEADERLOG) * 4;
-			to = &log->prefix[i - PCIE_STD_NUM_TLP_HEADERLOG];
-		}
 
-		ret = pci_read_config_dword(dev, off, to);
+		ret = pci_read_config_dword(dev, off, &log->dw[i]);
 		if (ret)
 			return pcibios_err_to_errno(ret);
 	}
 
+	/*
+	 * Hard-code non-Flit mode to 4 DWORDs, for now. The exact length
+	 * can only be known if the TLP is parsed.
+	 */
+	log->header_len = flit ? tlp_len : 4;
+	log->flit = flit;
+
 	return 0;
 }
 
@@ -94,22 +105,31 @@ int pcie_read_tlp_log(struct pci_dev *dev, int where, int where2,
 void pcie_print_tlp_log(const struct pci_dev *dev,
 			const struct pcie_tlp_log *log, const char *pfx)
 {
-	char buf[11 * (PCIE_STD_NUM_TLP_HEADERLOG + ARRAY_SIZE(log->prefix)) +
-		 sizeof(EE_PREFIX_STR)];
+	/* EE_PREFIX_STR fits the extended DW space needed for the Flit mode */
+	char buf[11 * PCIE_STD_MAX_TLP_HEADERLOG + 1];
 	unsigned int i;
 	int len;
 
 	len = scnprintf(buf, sizeof(buf), "%#010x %#010x %#010x %#010x",
 			log->dw[0], log->dw[1], log->dw[2], log->dw[3]);
 
-	if (log->prefix[0])
-		len += scnprintf(buf + len, sizeof(buf) - len, EE_PREFIX_STR);
-	for (i = 0; i < ARRAY_SIZE(log->prefix); i++) {
-		if (!log->prefix[i])
-			break;
-		len += scnprintf(buf + len, sizeof(buf) - len,
-				 " %#010x", log->prefix[i]);
+	if (log->flit) {
+		for (i = PCIE_STD_NUM_TLP_HEADERLOG; i < log->header_len; i++) {
+			len += scnprintf(buf + len, sizeof(buf) - len,
+					 " %#010x", log->dw[i]);
+		}
+	} else {
+		if (log->prefix[0])
+			len += scnprintf(buf + len, sizeof(buf) - len,
+					 EE_PREFIX_STR);
+		for (i = 0; i < ARRAY_SIZE(log->prefix); i++) {
+			if (!log->prefix[i])
+				break;
+			len += scnprintf(buf + len, sizeof(buf) - len,
+					 " %#010x", log->prefix[i]);
+		}
 	}
 
-	pci_err(dev, "%sTLP Header: %s\n", pfx, buf);
+	pci_err(dev, "%sTLP Header%s: %s\n", pfx,
+		log->flit ? " (Flit)" : "", buf);
 }
diff --git a/include/linux/aer.h b/include/linux/aer.h
index 947b63091902..02940be66324 100644
--- a/include/linux/aer.h
+++ b/include/linux/aer.h
@@ -22,12 +22,20 @@
  */
 #define PCIE_STD_NUM_TLP_HEADERLOG     4
 #define PCIE_STD_MAX_TLP_PREFIXLOG     4
+#define PCIE_STD_MAX_TLP_HEADERLOG	(PCIE_STD_NUM_TLP_HEADERLOG + 10)
 
 struct pci_dev;
 
 struct pcie_tlp_log {
-	u32 dw[PCIE_STD_NUM_TLP_HEADERLOG];
-	u32 prefix[PCIE_STD_MAX_TLP_PREFIXLOG];
+	union {
+		u32 dw[PCIE_STD_MAX_TLP_HEADERLOG];
+		struct {
+			u32 _do_not_use[PCIE_STD_NUM_TLP_HEADERLOG];
+			u32 prefix[PCIE_STD_MAX_TLP_PREFIXLOG];
+		};
+	};
+	u8 header_len;		/* Length of the Logged TLP Header in DWORDs */
+	bool flit;		/* TLP was logged when in Flit mode */
 };
 
 struct aer_capability_regs {
diff --git a/include/ras/ras_event.h b/include/ras/ras_event.h
index e5f7ee0864e7..14c9f943d53f 100644
--- a/include/ras/ras_event.h
+++ b/include/ras/ras_event.h
@@ -309,7 +309,7 @@ TRACE_EVENT(aer_event,
 		__field(	u32,		status		)
 		__field(	u8,		severity	)
 		__field(	u8, 		tlp_header_valid)
-		__array(	u32, 		tlp_header, 4	)
+		__array(	u32, 		tlp_header, PCIE_STD_MAX_TLP_HEADERLOG)
 	),
 
 	TP_fast_assign(
@@ -318,10 +318,10 @@ TRACE_EVENT(aer_event,
 		__entry->severity	= severity;
 		__entry->tlp_header_valid = tlp_header_valid;
 		if (tlp_header_valid) {
-			__entry->tlp_header[0] = tlp->dw[0];
-			__entry->tlp_header[1] = tlp->dw[1];
-			__entry->tlp_header[2] = tlp->dw[2];
-			__entry->tlp_header[3] = tlp->dw[3];
+			int i;
+
+			for (i = 0; i < PCIE_STD_MAX_TLP_HEADERLOG; i++)
+				__entry->tlp_header[i] = tlp->dw[i];
 		}
 	),
 
@@ -334,7 +334,7 @@ TRACE_EVENT(aer_event,
 		__print_flags(__entry->status, "|", aer_correctable_errors) :
 		__print_flags(__entry->status, "|", aer_uncorrectable_errors),
 		__entry->tlp_header_valid ?
-			__print_array(__entry->tlp_header, 4, 4) :
+			__print_array(__entry->tlp_header, PCIE_STD_MAX_TLP_HEADERLOG, 4) :
 			"Not available")
 );
 
diff --git a/include/uapi/linux/pci_regs.h b/include/uapi/linux/pci_regs.h
index 3445c4970e4d..2c801c0c968a 100644
--- a/include/uapi/linux/pci_regs.h
+++ b/include/uapi/linux/pci_regs.h
@@ -486,6 +486,7 @@
 #define   PCI_EXP_TYPE_RC_EC	   0xa	/* Root Complex Event Collector */
 #define  PCI_EXP_FLAGS_SLOT	0x0100	/* Slot implemented */
 #define  PCI_EXP_FLAGS_IRQ	0x3e00	/* Interrupt message number */
+#define  PCI_EXP_FLAGS_FLIT	0x8000	/* Flit Mode Supported */
 #define PCI_EXP_DEVCAP		0x04	/* Device capabilities */
 #define  PCI_EXP_DEVCAP_PAYLOAD	0x00000007 /* Max_Payload_Size */
 #define  PCI_EXP_DEVCAP_PHANTOM	0x00000018 /* Phantom functions */
@@ -795,6 +796,8 @@
 #define  PCI_ERR_CAP_ECRC_CHKC		0x00000080 /* ECRC Check Capable */
 #define  PCI_ERR_CAP_ECRC_CHKE		0x00000100 /* ECRC Check Enable */
 #define  PCI_ERR_CAP_PREFIX_LOG_PRESENT	0x00000800 /* TLP Prefix Log Present */
+#define  PCI_ERR_CAP_TLP_LOG_FLIT	0x00040000 /* TLP was logged in Flit Mode */
+#define  PCI_ERR_CAP_TLP_LOG_SIZE	0x00f80000 /* Logged TLP Size (only in Flit mode) */
 #define PCI_ERR_HEADER_LOG	0x1c	/* Header Log Register (16 bytes) */
 #define PCI_ERR_ROOT_COMMAND	0x2c	/* Root Error Command */
 #define  PCI_ERR_ROOT_CMD_COR_EN	0x00000001 /* Correctable Err Reporting Enable */
@@ -1061,8 +1064,9 @@
 #define  PCI_EXP_DPC_CAP_RP_EXT		0x0020	/* Root Port Extensions */
 #define  PCI_EXP_DPC_CAP_POISONED_TLP	0x0040	/* Poisoned TLP Egress Blocking Supported */
 #define  PCI_EXP_DPC_CAP_SW_TRIGGER	0x0080	/* Software Triggering Supported */
-#define  PCI_EXP_DPC_RP_PIO_LOG_SIZE	0x0F00	/* RP PIO Log Size */
+#define  PCI_EXP_DPC_RP_PIO_LOG_SIZE	0x0F00	/* RP PIO Log Size [3:0] */
 #define  PCI_EXP_DPC_CAP_DL_ACTIVE	0x1000	/* ERR_COR signal on DL_Active supported */
+#define  PCI_EXP_DPC_RP_PIO_LOG_SIZE4	0x2000	/* RP PIO Log Size [4] */
 
 #define PCI_EXP_DPC_CTL			0x06	/* DPC control */
 #define  PCI_EXP_DPC_CTL_EN_FATAL	0x0001	/* Enable trigger on ERR_FATAL message */
