Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-nextgrafted

Pull networking updates from Jakub Kicinski:
 "Core:

   - Add dedicated kmem_cache for typical/small skb->head, avoid having
     to access struct page at kfree time, and improve memory use.

   - Introduce sysctl to set default RPS configuration for new netdevs.

   - Define Netlink protocol specification format which can be used to
     describe messages used by each family and auto-generate parsers.
     Add tools for generating kernel data structures and uAPI headers.

   - Expose all net/core sysctls inside netns.

   - Remove 4s sleep in netpoll if carrier is instantly detected on
     boot.

   - Add configurable limit of MDB entries per port, and port-vlan.

   - Continue populating drop reasons throughout the stack.

   - Retire a handful of legacy Qdiscs and classifiers.

  Protocols:

   - Support IPv4 big TCP (TSO frames larger than 64kB).

   - Add IP_LOCAL_PORT_RANGE socket option, to control local port range
     on socket by socket basis.

   - Track and report in procfs number of MPTCP sockets used.

   - Support mixing IPv4 and IPv6 flows in the in-kernel MPTCP path
     manager.

   - IPv6: don't check net.ipv6.route.max_size and rely on garbage
     collection to free memory (similarly to IPv4).

   - Support Penultimate Segment Pop (PSP) flavor in SRv6 (RFC8986).

   - ICMP: add per-rate limit counters.

   - Add support for user scanning requests in ieee802154.

   - Remove static WEP support.

   - Support minimal Wi-Fi 7 Extremely High Throughput (EHT) rate
     reporting.

   - WiFi 7 EHT channel puncturing support (client & AP).

  BPF:

   - Add a rbtree data structure following the "next-gen data structure"
     precedent set by recently added linked list, that is, by using
     kfunc + kptr instead of adding a new BPF map type.

   - Expose XDP hints via kfuncs with initial support for RX hash and
     timestamp metadata.

   - Add BPF_F_NO_TUNNEL_KEY extension to bpf_skb_set_tunnel_key to
     better support decap on GRE tunnel devices not operating in collect
     metadata.

   - Improve x86 JIT's codegen for PROBE_MEM runtime error checks.

   - Remove the need for trace_printk_lock for bpf_trace_printk and
     bpf_trace_vprintk helpers.

   - Extend libbpf's bpf_tracing.h support for tracing arguments of
     kprobes/uprobes and syscall as a special case.

   - Significantly reduce the search time for module symbols by
     livepatch and BPF.

   - Enable cpumasks to be used as kptrs, which is useful for tracing
     programs tracking which tasks end up running on which CPUs in
     different time intervals.

   - Add support for BPF trampoline on s390x and riscv64.

   - Add capability to export the XDP features supported by the NIC.

   - Add __bpf_kfunc tag for marking kernel functions as kfuncs.

   - Add cgroup.memory=nobpf kernel parameter option to disable BPF
     memory accounting for container environments.

  Netfilter:

   - Remove the CLUSTERIP target. It has been marked as obsolete for
     years, and we still have WARN splats wrt races of the out-of-band
     /proc interface installed by this target.

   - Add 'destroy' commands to nf_tables. They are identical to the
     existing 'delete' commands, but do not return an error if the
     referenced object (set, chain, rule...) did not exist.

  Driver API:

   - Improve cpumask_local_spread() locality to help NICs set the right
     IRQ affinity on AMD platforms.

   - Separate C22 and C45 MDIO bus transactions more clearly.

   - Introduce new DCB table to control DSCP rewrite on egress.

   - Support configuration of Physical Layer Collision Avoidance (PLCA)
     Reconciliation Sublayer (RS) (802.3cg-2019). Modern version of
     shared medium Ethernet.

   - Support for MAC Merge layer (IEEE 802.3-2018 clause 99). Allowing
     preemption of low priority frames by high priority frames.

   - Add support for controlling MACSec offload using netlink SET.

   - Rework devlink instance refcounts to allow registration and
     de-registration under the instance lock. Split the code into
     multiple files, drop some of the unnecessarily granular locks and
     factor out common parts of netlink operation handling.

   - Add TX frame aggregation parameters (for USB drivers).

   - Add a new attr TCA_EXT_WARN_MSG to report TC (offload) warning
     messages with notifications for debug.

   - Allow offloading of UDP NEW connections via act_ct.

   - Add support for per action HW stats in TC.

   - Support hardware miss to TC action (continue processing in SW from
     a specific point in the action chain).

   - Warn if old Wireless Extension user space interface is used with
     modern cfg80211/mac80211 drivers. Do not support Wireless
     Extensions for Wi-Fi 7 devices at all. Everyone should switch to
     using nl80211 interface instead.

   - Improve the CAN bit timing configuration. Use extack to return
     error messages directly to user space, update the SJW handling,
     including the definition of a new default value that will benefit
     CAN-FD controllers, by increasing their oscillator tolerance.

  New hardware / drivers:

   - Ethernet:
      - nVidia BlueField-3 support (control traffic driver)
      - Ethernet support for imx93 SoCs
      - Motorcomm yt8531 gigabit Ethernet PHY
      - onsemi NCN26000 10BASE-T1S PHY (with support for PLCA)
      - Microchip LAN8841 PHY (incl. cable diagnostics and PTP)
      - Amlogic gxl MDIO mux

   - WiFi:
      - RealTek RTL8188EU (rtl8xxxu)
      - Qualcomm Wi-Fi 7 devices (ath12k)

   - CAN:
      - Renesas R-Car V4H

  Drivers:

   - Bluetooth:
      - Set Per Platform Antenna Gain (PPAG) for Intel controllers.

   - Ethernet NICs:
      - Intel (1G, igc):
         - support TSN / Qbv / packet scheduling features of i226 model
      - Intel (100G, ice):
         - use GNSS subsystem instead of TTY
         - multi-buffer XDP support
         - extend support for GPIO pins to E823 devices
      - nVidia/Mellanox:
         - update the shared buffer configuration on PFC commands
         - implement PTP adjphase function for HW offset control
         - TC support for Geneve and GRE with VF tunnel offload
         - more efficient crypto key management method
         - multi-port eswitch support
      - Netronome/Corigine:
         - add DCB IEEE support
         - support IPsec offloading for NFP3800
      - Freescale/NXP (enetc):
         - support XDP_REDIRECT for XDP non-linear buffers
         - improve reconfig, avoid link flap and waiting for idle
         - support MAC Merge layer
      - Other NICs:
         - sfc/ef100: add basic devlink support for ef100
         - ionic: rx_push mode operation (writing descriptors via MMIO)
         - bnxt: use the auxiliary bus abstraction for RDMA
         - r8169: disable ASPM and reset bus in case of tx timeout
         - cpsw: support QSGMII mode for J721e CPSW9G
         - cpts: support pulse-per-second output
         - ngbe: add an mdio bus driver
         - usbnet: optimize usbnet_bh() by avoiding unnecessary queuing
         - r8152: handle devices with FW with NCM support
         - amd-xgbe: support 10Mbps, 2.5GbE speeds and rx-adaptation
         - virtio-net: support multi buffer XDP
         - virtio/vsock: replace virtio_vsock_pkt with sk_buff
         - tsnep: XDP support

   - Ethernet high-speed switches:
      - nVidia/Mellanox (mlxsw):
         - add support for latency TLV (in FW control messages)
      - Microchip (sparx5):
         - separate explicit and implicit traffic forwarding rules, make
           the implicit rules always active
         - add support for egress DSCP rewrite
         - IS0 VCAP support (Ingress Classification)
         - IS2 VCAP filters (protos, L3 addrs, L4 ports, flags, ToS
           etc.)
         - ES2 VCAP support (Egress Access Control)
         - support for Per-Stream Filtering and Policing (802.1Q,
           8.6.5.1)

   - Ethernet embedded switches:
      - Marvell (mv88e6xxx):
         - add MAB (port auth) offload support
         - enable PTP receive for mv88e6390
      - NXP (ocelot):
         - support MAC Merge layer
         - support for the the vsc7512 internal copper phys
      - Microchip:
         - lan9303: convert to PHYLINK
         - lan966x: support TC flower filter statistics
         - lan937x: PTP support for KSZ9563/KSZ8563 and LAN937x
         - lan937x: support Credit Based Shaper configuration
         - ksz9477: support Energy Efficient Ethernet
      - other:
         - qca8k: convert to regmap read/write API, use bulk operations
         - rswitch: Improve TX timestamp accuracy

   - Intel WiFi (iwlwifi):
      - EHT (Wi-Fi 7) rate reporting
      - STEP equalizer support: transfer some STEP (connection to radio
        on platforms with integrated wifi) related parameters from the
        BIOS to the firmware.

   - Qualcomm 802.11ax WiFi (ath11k):
      - IPQ5018 support
      - Fine Timing Measurement (FTM) responder role support
      - channel 177 support

   - MediaTek WiFi (mt76):
      - per-PHY LED support
      - mt7996: EHT (Wi-Fi 7) support
      - Wireless Ethernet Dispatch (WED) reset support
      - switch to using page pool allocator

   - RealTek WiFi (rtw89):
      - support new version of Bluetooth co-existance

   - Mobile:
      - rmnet: support TX aggregation"

* tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1872 commits)
  page_pool: add a comment explaining the fragment counter usage
  net: ethtool: fix __ethtool_dev_mm_supported() implementation
  ethtool: pse-pd: Fix double word in comments
  xsk: add linux/vmalloc.h to xsk.c
  sefltests: netdevsim: wait for devlink instance after netns removal
  selftest: fib_tests: Always cleanup before exit
  net/mlx5e: Align IPsec ASO result memory to be as required by hardware
  net/mlx5e: TC, Set CT miss to the specific ct action instance
  net/mlx5e: Rename CHAIN_TO_REG to MAPPED_OBJ_TO_REG
  net/mlx5: Refactor tc miss handling to a single function
  net/mlx5: Kconfig: Make tc offload depend on tc skb extension
  net/sched: flower: Support hardware miss to tc action
  net/sched: flower: Move filter handle initialization earlier
  net/sched: cls_api: Support hardware miss to tc action
  net/sched: Rename user cookie and act cookie
  sfc: fix builds without CONFIG_RTC_LIB
  sfc: clean up some inconsistent indentings
  net/mlx4_en: Introduce flexible array to silence overflow warning
  net: lan966x: Fix possible deadlock inside PTP
  net/ulp: Remove redundant ->clone() test in inet_clone_ulp().
  ...

1 files changed, 1446 insertions, 0 deletions

diff --git a/drivers/edac/mce_amd.c b/drivers/edac/mce_amd.c
new file mode 100644
index 000000000..cc5c63feb
--- /dev/null
+++ b/drivers/edac/mce_amd.c
@@ -0,0 +1,1446 @@
+// SPDX-License-Identifier: GPL-2.0-only
+#include <linux/module.h>
+#include <linux/slab.h>
+
+#include <asm/cpu.h>
+
+#include "mce_amd.h"
+
+static struct amd_decoder_ops fam_ops;
+
+static u8 xec_mask	 = 0xf;
+
+static void (*decode_dram_ecc)(int node_id, struct mce *m);
+
+void amd_register_ecc_decoder(void (*f)(int, struct mce *))
+{
+	decode_dram_ecc = f;
+}
+EXPORT_SYMBOL_GPL(amd_register_ecc_decoder);
+
+void amd_unregister_ecc_decoder(void (*f)(int, struct mce *))
+{
+	if (decode_dram_ecc) {
+		WARN_ON(decode_dram_ecc != f);
+
+		decode_dram_ecc = NULL;
+	}
+}
+EXPORT_SYMBOL_GPL(amd_unregister_ecc_decoder);
+
+/*
+ * string representation for the different MCA reported error types, see F3x48
+ * or MSR0000_0411.
+ */
+
+/* transaction type */
+static const char * const tt_msgs[] = { "INSN", "DATA", "GEN", "RESV" };
+
+/* cache level */
+static const char * const ll_msgs[] = { "RESV", "L1", "L2", "L3/GEN" };
+
+/* memory transaction type */
+static const char * const rrrr_msgs[] = {
+       "GEN", "RD", "WR", "DRD", "DWR", "IRD", "PRF", "EV", "SNP"
+};
+
+/* participating processor */
+const char * const pp_msgs[] = { "SRC", "RES", "OBS", "GEN" };
+EXPORT_SYMBOL_GPL(pp_msgs);
+
+/* request timeout */
+static const char * const to_msgs[] = { "no timeout", "timed out" };
+
+/* memory or i/o */
+static const char * const ii_msgs[] = { "MEM", "RESV", "IO", "GEN" };
+
+/* internal error type */
+static const char * const uu_msgs[] = { "RESV", "RESV", "HWA", "RESV" };
+
+static const char * const f15h_mc1_mce_desc[] = {
+	"UC during a demand linefill from L2",
+	"Parity error during data load from IC",
+	"Parity error for IC valid bit",
+	"Main tag parity error",
+	"Parity error in prediction queue",
+	"PFB data/address parity error",
+	"Parity error in the branch status reg",
+	"PFB promotion address error",
+	"Tag error during probe/victimization",
+	"Parity error for IC probe tag valid bit",
+	"PFB non-cacheable bit parity error",
+	"PFB valid bit parity error",			/* xec = 0xd */
+	"Microcode Patch Buffer",			/* xec = 010 */
+	"uop queue",
+	"insn buffer",
+	"predecode buffer",
+	"fetch address FIFO",
+	"dispatch uop queue"
+};
+
+static const char * const f15h_mc2_mce_desc[] = {
+	"Fill ECC error on data fills",			/* xec = 0x4 */
+	"Fill parity error on insn fills",
+	"Prefetcher request FIFO parity error",
+	"PRQ address parity error",
+	"PRQ data parity error",
+	"WCC Tag ECC error",
+	"WCC Data ECC error",
+	"WCB Data parity error",
+	"VB Data ECC or parity error",
+	"L2 Tag ECC error",				/* xec = 0x10 */
+	"Hard L2 Tag ECC error",
+	"Multiple hits on L2 tag",
+	"XAB parity error",
+	"PRB address parity error"
+};
+
+static const char * const mc4_mce_desc[] = {
+	"DRAM ECC error detected on the NB",
+	"CRC error detected on HT link",
+	"Link-defined sync error packets detected on HT link",
+	"HT Master abort",
+	"HT Target abort",
+	"Invalid GART PTE entry during GART table walk",
+	"Unsupported atomic RMW received from an IO link",
+	"Watchdog timeout due to lack of progress",
+	"DRAM ECC error detected on the NB",
+	"SVM DMA Exclusion Vector error",
+	"HT data error detected on link",
+	"Protocol error (link, L3, probe filter)",
+	"NB internal arrays parity error",
+	"DRAM addr/ctl signals parity error",
+	"IO link transmission error",
+	"L3 data cache ECC error",			/* xec = 0x1c */
+	"L3 cache tag error",
+	"L3 LRU parity bits error",
+	"ECC Error in the Probe Filter directory"
+};
+
+static const char * const mc5_mce_desc[] = {
+	"CPU Watchdog timer expire",
+	"Wakeup array dest tag",
+	"AG payload array",
+	"EX payload array",
+	"IDRF array",
+	"Retire dispatch queue",
+	"Mapper checkpoint array",
+	"Physical register file EX0 port",
+	"Physical register file EX1 port",
+	"Physical register file AG0 port",
+	"Physical register file AG1 port",
+	"Flag register file",
+	"DE error occurred",
+	"Retire status queue"
+};
+
+static const char * const mc6_mce_desc[] = {
+	"Hardware Assertion",
+	"Free List",
+	"Physical Register File",
+	"Retire Queue",
+	"Scheduler table",
+	"Status Register File",
+};
+
+/* Scalable MCA error strings */
+static const char * const smca_ls_mce_desc[] = {
+	"Load queue parity error",
+	"Store queue parity error",
+	"Miss address buffer payload parity error",
+	"Level 1 TLB parity error",
+	"DC Tag error type 5",
+	"DC Tag error type 6",
+	"DC Tag error type 1",
+	"Internal error type 1",
+	"Internal error type 2",
+	"System Read Data Error Thread 0",
+	"System Read Data Error Thread 1",
+	"DC Tag error type 2",
+	"DC Data error type 1 and poison consumption",
+	"DC Data error type 2",
+	"DC Data error type 3",
+	"DC Tag error type 4",
+	"Level 2 TLB parity error",
+	"PDC parity error",
+	"DC Tag error type 3",
+	"DC Tag error type 5",
+	"L2 Fill Data error",
+};
+
+static const char * const smca_ls2_mce_desc[] = {
+	"An ECC error was detected on a data cache read by a probe or victimization",
+	"An ECC error or L2 poison was detected on a data cache read by a load",
+	"An ECC error was detected on a data cache read-modify-write by a store",
+	"An ECC error or poison bit mismatch was detected on a tag read by a probe or victimization",
+	"An ECC error or poison bit mismatch was detected on a tag read by a load",
+	"An ECC error or poison bit mismatch was detected on a tag read by a store",
+	"An ECC error was detected on an EMEM read by a load",
+	"An ECC error was detected on an EMEM read-modify-write by a store",
+	"A parity error was detected in an L1 TLB entry by any access",
+	"A parity error was detected in an L2 TLB entry by any access",
+	"A parity error was detected in a PWC entry by any access",
+	"A parity error was detected in an STQ entry by any access",
+	"A parity error was detected in an LDQ entry by any access",
+	"A parity error was detected in a MAB entry by any access",
+	"A parity error was detected in an SCB entry state field by any access",
+	"A parity error was detected in an SCB entry address field by any access",
+	"A parity error was detected in an SCB entry data field by any access",
+	"A parity error was detected in a WCB entry by any access",
+	"A poisoned line was detected in an SCB entry by any access",
+	"A SystemReadDataError error was reported on read data returned from L2 for a load",
+	"A SystemReadDataError error was reported on read data returned from L2 for an SCB store",
+	"A SystemReadDataError error was reported on read data returned from L2 for a WCB store",
+	"A hardware assertion error was reported",
+	"A parity error was detected in an STLF, SCB EMEM entry or SRB store data by any access",
+};
+
+static const char * const smca_if_mce_desc[] = {
+	"Op Cache Microtag Probe Port Parity Error",
+	"IC Microtag or Full Tag Multi-hit Error",
+	"IC Full Tag Parity Error",
+	"IC Data Array Parity Error",
+	"Decoupling Queue PhysAddr Parity Error",
+	"L0 ITLB Parity Error",
+	"L1 ITLB Parity Error",
+	"L2 ITLB Parity Error",
+	"BPQ Thread 0 Snoop Parity Error",
+	"BPQ Thread 1 Snoop Parity Error",
+	"L1 BTB Multi-Match Error",
+	"L2 BTB Multi-Match Error",
+	"L2 Cache Response Poison Error",
+	"System Read Data Error",
+	"Hardware Assertion Error",
+	"L1-TLB Multi-Hit",
+	"L2-TLB Multi-Hit",
+	"BSR Parity Error",
+	"CT MCE",
+};
+
+static const char * const smca_l2_mce_desc[] = {
+	"L2M Tag Multiple-Way-Hit error",
+	"L2M Tag or State Array ECC Error",
+	"L2M Data Array ECC Error",
+	"Hardware Assert Error",
+};
+
+static const char * const smca_de_mce_desc[] = {
+	"Micro-op cache tag parity error",
+	"Micro-op cache data parity error",
+	"Instruction buffer parity error",
+	"Micro-op queue parity error",
+	"Instruction dispatch queue parity error",
+	"Fetch address FIFO parity error",
+	"Patch RAM data parity error",
+	"Patch RAM sequencer parity error",
+	"Micro-op buffer parity error",
+	"Hardware Assertion MCA Error",
+};
+
+static const char * const smca_ex_mce_desc[] = {
+	"Watchdog Timeout error",
+	"Physical register file parity error",
+	"Flag register file parity error",
+	"Immediate displacement register file parity error",
+	"Address generator payload parity error",
+	"EX payload parity error",
+	"Checkpoint queue parity error",
+	"Retire dispatch queue parity error",
+	"Retire status queue parity error",
+	"Scheduling queue parity error",
+	"Branch buffer queue parity error",
+	"Hardware Assertion error",
+	"Spec Map parity error",
+	"Retire Map parity error",
+};
+
+static const char * const smca_fp_mce_desc[] = {
+	"Physical register file (PRF) parity error",
+	"Freelist (FL) parity error",
+	"Schedule queue parity error",
+	"NSQ parity error",
+	"Retire queue (RQ) parity error",
+	"Status register file (SRF) parity error",
+	"Hardware assertion",
+};
+
+static const char * const smca_l3_mce_desc[] = {
+	"Shadow Tag Macro ECC Error",
+	"Shadow Tag Macro Multi-way-hit Error",
+	"L3M Tag ECC Error",
+	"L3M Tag Multi-way-hit Error",
+	"L3M Data ECC Error",
+	"SDP Parity Error or SystemReadDataError from XI",
+	"L3 Victim Queue Parity Error",
+	"L3 Hardware Assertion",
+};
+
+static const char * const smca_cs_mce_desc[] = {
+	"Illegal Request",
+	"Address Violation",
+	"Security Violation",
+	"Illegal Response",
+	"Unexpected Response",
+	"Request or Probe Parity Error",
+	"Read Response Parity Error",
+	"Atomic Request Parity Error",
+	"Probe Filter ECC Error",
+};
+
+static const char * const smca_cs2_mce_desc[] = {
+	"Illegal Request",
+	"Address Violation",
+	"Security Violation",
+	"Illegal Response",
+	"Unexpected Response",
+	"Request or Probe Parity Error",
+	"Read Response Parity Error",
+	"Atomic Request Parity Error",
+	"SDP read response had no match in the CS queue",
+	"Probe Filter Protocol Error",
+	"Probe Filter ECC Error",
+	"SDP read response had an unexpected RETRY error",
+	"Counter overflow error",
+	"Counter underflow error",
+};
+
+static const char * const smca_pie_mce_desc[] = {
+	"Hardware Assert",
+	"Register security violation",
+	"Link Error",
+	"Poison data consumption",
+	"A deferred error was detected in the DF"
+};
+
+static const char * const smca_umc_mce_desc[] = {
+	"DRAM ECC error",
+	"Data poison error",
+	"SDP parity error",
+	"Advanced peripheral bus error",
+	"Address/Command parity error",
+	"Write data CRC error",
+	"DCQ SRAM ECC error",
+	"AES SRAM ECC error",
+};
+
+static const char * const smca_umc2_mce_desc[] = {
+	"DRAM ECC error",
+	"Data poison error",
+	"SDP parity error",
+	"Reserved",
+	"Address/Command parity error",
+	"Write data parity error",
+	"DCQ SRAM ECC error",
+	"Reserved",
+	"Read data parity error",
+	"Rdb SRAM ECC error",
+	"RdRsp SRAM ECC error",
+	"LM32 MP errors",
+};
+
+static const char * const smca_pb_mce_desc[] = {
+	"An ECC error in the Parameter Block RAM array",
+};
+
+static const char * const smca_psp_mce_desc[] = {
+	"An ECC or parity error in a PSP RAM instance",
+};
+
+static const char * const smca_psp2_mce_desc[] = {
+	"High SRAM ECC or parity error",
+	"Low SRAM ECC or parity error",
+	"Instruction Cache Bank 0 ECC or parity error",
+	"Instruction Cache Bank 1 ECC or parity error",
+	"Instruction Tag Ram 0 parity error",
+	"Instruction Tag Ram 1 parity error",
+	"Data Cache Bank 0 ECC or parity error",
+	"Data Cache Bank 1 ECC or parity error",
+	"Data Cache Bank 2 ECC or parity error",
+	"Data Cache Bank 3 ECC or parity error",
+	"Data Tag Bank 0 parity error",
+	"Data Tag Bank 1 parity error",
+	"Data Tag Bank 2 parity error",
+	"Data Tag Bank 3 parity error",
+	"Dirty Data Ram parity error",
+	"TLB Bank 0 parity error",
+	"TLB Bank 1 parity error",
+	"System Hub Read Buffer ECC or parity error",
+};
+
+static const char * const smca_smu_mce_desc[] = {
+	"An ECC or parity error in an SMU RAM instance",
+};
+
+static const char * const smca_smu2_mce_desc[] = {
+	"High SRAM ECC or parity error",
+	"Low SRAM ECC or parity error",
+	"Data Cache Bank A ECC or parity error",
+	"Data Cache Bank B ECC or parity error",
+	"Data Tag Cache Bank A ECC or parity error",
+	"Data Tag Cache Bank B ECC or parity error",
+	"Instruction Cache Bank A ECC or parity error",
+	"Instruction Cache Bank B ECC or parity error",
+	"Instruction Tag Cache Bank A ECC or parity error",
+	"Instruction Tag Cache Bank B ECC or parity error",
+	"System Hub Read Buffer ECC or parity error",
+	"PHY RAM ECC error",
+};
+
+static const char * const smca_mp5_mce_desc[] = {
+	"High SRAM ECC or parity error",
+	"Low SRAM ECC or parity error",
+	"Data Cache Bank A ECC or parity error",
+	"Data Cache Bank B ECC or parity error",
+	"Data Tag Cache Bank A ECC or parity error",
+	"Data Tag Cache Bank B ECC or parity error",
+	"Instruction Cache Bank A ECC or parity error",
+	"Instruction Cache Bank B ECC or parity error",
+	"Instruction Tag Cache Bank A ECC or parity error",
+	"Instruction Tag Cache Bank B ECC or parity error",
+};
+
+static const char * const smca_mpdma_mce_desc[] = {
+	"Main SRAM [31:0] bank ECC or parity error",
+	"Main SRAM [63:32] bank ECC or parity error",
+	"Main SRAM [95:64] bank ECC or parity error",
+	"Main SRAM [127:96] bank ECC or parity error",
+	"Data Cache Bank A ECC or parity error",
+	"Data Cache Bank B ECC or parity error",
+	"Data Tag Cache Bank A ECC or parity error",
+	"Data Tag Cache Bank B ECC or parity error",
+	"Instruction Cache Bank A ECC or parity error",
+	"Instruction Cache Bank B ECC or parity error",
+	"Instruction Tag Cache Bank A ECC or parity error",
+	"Instruction Tag Cache Bank B ECC or parity error",
+	"Data Cache Bank A ECC or parity error",
+	"Data Cache Bank B ECC or parity error",
+	"Data Tag Cache Bank A ECC or parity error",
+	"Data Tag Cache Bank B ECC or parity error",
+	"Instruction Cache Bank A ECC or parity error",
+	"Instruction Cache Bank B ECC or parity error",
+	"Instruction Tag Cache Bank A ECC or parity error",
+	"Instruction Tag Cache Bank B ECC or parity error",
+	"Data Cache Bank A ECC or parity error",
+	"Data Cache Bank B ECC or parity error",
+	"Data Tag Cache Bank A ECC or parity error",
+	"Data Tag Cache Bank B ECC or parity error",
+	"Instruction Cache Bank A ECC or parity error",
+	"Instruction Cache Bank B ECC or parity error",
+	"Instruction Tag Cache Bank A ECC or parity error",
+	"Instruction Tag Cache Bank B ECC or parity error",
+	"System Hub Read Buffer ECC or parity error",
+	"MPDMA TVF DVSEC Memory ECC or parity error",
+	"MPDMA TVF MMIO Mailbox0 ECC or parity error",
+	"MPDMA TVF MMIO Mailbox1 ECC or parity error",
+	"MPDMA TVF Doorbell Memory ECC or parity error",
+	"MPDMA TVF SDP Slave Memory 0 ECC or parity error",
+	"MPDMA TVF SDP Slave Memory 1 ECC or parity error",
+	"MPDMA TVF SDP Slave Memory 2 ECC or parity error",
+	"MPDMA TVF SDP Master Memory 0 ECC or parity error",
+	"MPDMA TVF SDP Master Memory 1 ECC or parity error",
+	"MPDMA TVF SDP Master Memory 2 ECC or parity error",
+	"MPDMA TVF SDP Master Memory 3 ECC or parity error",
+	"MPDMA TVF SDP Master Memory 4 ECC or parity error",
+	"MPDMA TVF SDP Master Memory 5 ECC or parity error",
+	"MPDMA TVF SDP Master Memory 6 ECC or parity error",
+	"MPDMA PTE Command FIFO ECC or parity error",
+	"MPDMA PTE Hub Data FIFO ECC or parity error",
+	"MPDMA PTE Internal Data FIFO ECC or parity error",
+	"MPDMA PTE Command Memory DMA ECC or parity error",
+	"MPDMA PTE Command Memory Internal ECC or parity error",
+	"MPDMA PTE DMA Completion FIFO ECC or parity error",
+	"MPDMA PTE Tablewalk Completion FIFO ECC or parity error",
+	"MPDMA PTE Descriptor Completion FIFO ECC or parity error",
+	"MPDMA PTE ReadOnly Completion FIFO ECC or parity error",
+	"MPDMA PTE DirectWrite Completion FIFO ECC or parity error",
+	"SDP Watchdog Timer expired",
+};
+
+static const char * const smca_nbio_mce_desc[] = {
+	"ECC or Parity error",
+	"PCIE error",
+	"SDP ErrEvent error",
+	"SDP Egress Poison Error",
+	"IOHC Internal Poison Error",
+};
+
+static const char * const smca_pcie_mce_desc[] = {
+	"CCIX PER Message logging",
+	"CCIX Read Response with Status: Non-Data Error",
+	"CCIX Write Response with Status: Non-Data Error",
+	"CCIX Read Response with Status: Data Error",
+	"CCIX Non-okay write response with data error",
+};
+
+static const char * const smca_pcie2_mce_desc[] = {
+	"SDP Parity Error logging",
+};
+
+static const char * const smca_xgmipcs_mce_desc[] = {
+	"Data Loss Error",
+	"Training Error",
+	"Flow Control Acknowledge Error",
+	"Rx Fifo Underflow Error",
+	"Rx Fifo Overflow Error",
+	"CRC Error",
+	"BER Exceeded Error",
+	"Tx Vcid Data Error",
+	"Replay Buffer Parity Error",
+	"Data Parity Error",
+	"Replay Fifo Overflow Error",
+	"Replay Fifo Underflow Error",
+	"Elastic Fifo Overflow Error",
+	"Deskew Error",
+	"Flow Control CRC Error",
+	"Data Startup Limit Error",
+	"FC Init Timeout Error",
+	"Recovery Timeout Error",
+	"Ready Serial Timeout Error",
+	"Ready Serial Attempt Error",
+	"Recovery Attempt Error",
+	"Recovery Relock Attempt Error",
+	"Replay Attempt Error",
+	"Sync Header Error",
+	"Tx Replay Timeout Error",
+	"Rx Replay Timeout Error",
+	"LinkSub Tx Timeout Error",
+	"LinkSub Rx Timeout Error",
+	"Rx CMD Packet Error",
+};
+
+static const char * const smca_xgmiphy_mce_desc[] = {
+	"RAM ECC Error",
+	"ARC instruction buffer parity error",
+	"ARC data buffer parity error",
+	"PHY APB error",
+};
+
+static const char * const smca_nbif_mce_desc[] = {
+	"Timeout error from GMI",
+	"SRAM ECC error",
+	"NTB Error Event",
+	"SDP Parity error",
+};
+
+static const char * const smca_sata_mce_desc[] = {
+	"Parity error for port 0",
+	"Parity error for port 1",
+	"Parity error for port 2",
+	"Parity error for port 3",
+	"Parity error for port 4",
+	"Parity error for port 5",
+	"Parity error for port 6",
+	"Parity error for port 7",
+};
+
+static const char * const smca_usb_mce_desc[] = {
+	"Parity error or ECC error for S0 RAM0",
+	"Parity error or ECC error for S0 RAM1",
+	"Parity error or ECC error for S0 RAM2",
+	"Parity error for PHY RAM0",
+	"Parity error for PHY RAM1",
+	"AXI Slave Response error",
+};
+
+static const char * const smca_gmipcs_mce_desc[] = {
+	"Data Loss Error",
+	"Training Error",
+	"Replay Parity Error",
+	"Rx Fifo Underflow Error",
+	"Rx Fifo Overflow Error",
+	"CRC Error",
+	"BER Exceeded Error",
+	"Tx Fifo Underflow Error",
+	"Replay Buffer Parity Error",
+	"Tx Overflow Error",
+	"Replay Fifo Overflow Error",
+	"Replay Fifo Underflow Error",
+	"Elastic Fifo Overflow Error",
+	"Deskew Error",
+	"Offline Error",
+	"Data Startup Limit Error",
+	"FC Init Timeout Error",
+	"Recovery Timeout Error",
+	"Ready Serial Timeout Error",
+	"Ready Serial Attempt Error",
+	"Recovery Attempt Error",
+	"Recovery Relock Attempt Error",
+	"Deskew Abort Error",
+	"Rx Buffer Error",
+	"Rx LFDS Fifo Overflow Error",
+	"Rx LFDS Fifo Underflow Error",
+	"LinkSub Tx Timeout Error",
+	"LinkSub Rx Timeout Error",
+	"Rx CMD Packet Error",
+	"LFDS Training Timeout Error",
+	"LFDS FC Init Timeout Error",
+	"Data Loss Error",
+};
+
+struct smca_mce_desc {
+	const char * const *descs;
+	unsigned int num_descs;
+};
+
+static struct smca_mce_desc smca_mce_descs[] = {
+	[SMCA_LS]	= { smca_ls_mce_desc,	ARRAY_SIZE(smca_ls_mce_desc)	},
+	[SMCA_LS_V2]	= { smca_ls2_mce_desc,	ARRAY_SIZE(smca_ls2_mce_desc)	},
+	[SMCA_IF]	= { smca_if_mce_desc,	ARRAY_SIZE(smca_if_mce_desc)	},
+	[SMCA_L2_CACHE]	= { smca_l2_mce_desc,	ARRAY_SIZE(smca_l2_mce_desc)	},
+	[SMCA_DE]	= { smca_de_mce_desc,	ARRAY_SIZE(smca_de_mce_desc)	},
+	[SMCA_EX]	= { smca_ex_mce_desc,	ARRAY_SIZE(smca_ex_mce_desc)	},
+	[SMCA_FP]	= { smca_fp_mce_desc,	ARRAY_SIZE(smca_fp_mce_desc)	},
+	[SMCA_L3_CACHE]	= { smca_l3_mce_desc,	ARRAY_SIZE(smca_l3_mce_desc)	},
+	[SMCA_CS]	= { smca_cs_mce_desc,	ARRAY_SIZE(smca_cs_mce_desc)	},
+	[SMCA_CS_V2]	= { smca_cs2_mce_desc,	ARRAY_SIZE(smca_cs2_mce_desc)	},
+	[SMCA_PIE]	= { smca_pie_mce_desc,	ARRAY_SIZE(smca_pie_mce_desc)	},
+	[SMCA_UMC]	= { smca_umc_mce_desc,	ARRAY_SIZE(smca_umc_mce_desc)	},
+	[SMCA_UMC_V2]	= { smca_umc2_mce_desc,	ARRAY_SIZE(smca_umc2_mce_desc)	},
+	[SMCA_PB]	= { smca_pb_mce_desc,	ARRAY_SIZE(smca_pb_mce_desc)	},
+	[SMCA_PSP]	= { smca_psp_mce_desc,	ARRAY_SIZE(smca_psp_mce_desc)	},
+	[SMCA_PSP_V2]	= { smca_psp2_mce_desc,	ARRAY_SIZE(smca_psp2_mce_desc)	},
+	[SMCA_SMU]	= { smca_smu_mce_desc,	ARRAY_SIZE(smca_smu_mce_desc)	},
+	[SMCA_SMU_V2]	= { smca_smu2_mce_desc,	ARRAY_SIZE(smca_smu2_mce_desc)	},
+	[SMCA_MP5]	= { smca_mp5_mce_desc,	ARRAY_SIZE(smca_mp5_mce_desc)	},
+	[SMCA_MPDMA]	= { smca_mpdma_mce_desc,	ARRAY_SIZE(smca_mpdma_mce_desc)	},
+	[SMCA_NBIO]	= { smca_nbio_mce_desc,	ARRAY_SIZE(smca_nbio_mce_desc)	},
+	[SMCA_PCIE]	= { smca_pcie_mce_desc,	ARRAY_SIZE(smca_pcie_mce_desc)	},
+	[SMCA_PCIE_V2]	= { smca_pcie2_mce_desc,   ARRAY_SIZE(smca_pcie2_mce_desc)	},
+	[SMCA_XGMI_PCS]	= { smca_xgmipcs_mce_desc, ARRAY_SIZE(smca_xgmipcs_mce_desc)	},
+	/* NBIF and SHUB have the same error descriptions, for now. */
+	[SMCA_NBIF]	= { smca_nbif_mce_desc, ARRAY_SIZE(smca_nbif_mce_desc)	},
+	[SMCA_SHUB]	= { smca_nbif_mce_desc, ARRAY_SIZE(smca_nbif_mce_desc)	},
+	[SMCA_SATA]	= { smca_sata_mce_desc, ARRAY_SIZE(smca_sata_mce_desc)	},
+	[SMCA_USB]	= { smca_usb_mce_desc,	ARRAY_SIZE(smca_usb_mce_desc)	},
+	[SMCA_GMI_PCS]	= { smca_gmipcs_mce_desc,  ARRAY_SIZE(smca_gmipcs_mce_desc)	},
+	/* All the PHY bank types have the same error descriptions, for now. */
+	[SMCA_XGMI_PHY]	= { smca_xgmiphy_mce_desc, ARRAY_SIZE(smca_xgmiphy_mce_desc)	},
+	[SMCA_WAFL_PHY]	= { smca_xgmiphy_mce_desc, ARRAY_SIZE(smca_xgmiphy_mce_desc)	},
+	[SMCA_GMI_PHY]	= { smca_xgmiphy_mce_desc, ARRAY_SIZE(smca_xgmiphy_mce_desc)	},
+};
+
+static bool f12h_mc0_mce(u16 ec, u8 xec)
+{
+	bool ret = false;
+
+	if (MEM_ERROR(ec)) {
+		u8 ll = LL(ec);
+		ret = true;
+
+		if (ll == LL_L2)
+			pr_cont("during L1 linefill from L2.\n");
+		else if (ll == LL_L1)
+			pr_cont("Data/Tag %s error.\n", R4_MSG(ec));
+		else
+			ret = false;
+	}
+	return ret;
+}
+
+static bool f10h_mc0_mce(u16 ec, u8 xec)
+{
+	if (R4(ec) == R4_GEN && LL(ec) == LL_L1) {
+		pr_cont("during data scrub.\n");
+		return true;
+	}
+	return f12h_mc0_mce(ec, xec);
+}
+
+static bool k8_mc0_mce(u16 ec, u8 xec)
+{
+	if (BUS_ERROR(ec)) {
+		pr_cont("during system linefill.\n");
+		return true;
+	}
+
+	return f10h_mc0_mce(ec, xec);
+}
+
+static bool cat_mc0_mce(u16 ec, u8 xec)
+{
+	u8 r4	 = R4(ec);
+	bool ret = true;
+
+	if (MEM_ERROR(ec)) {
+
+		if (TT(ec) != TT_DATA || LL(ec) != LL_L1)
+			return false;
+
+		switch (r4) {
+		case R4_DRD:
+		case R4_DWR:
+			pr_cont("Data/Tag parity error due to %s.\n",
+				(r4 == R4_DRD ? "load/hw prf" : "store"));
+			break;
+		case R4_EVICT:
+			pr_cont("Copyback parity error on a tag miss.\n");
+			break;
+		case R4_SNOOP:
+			pr_cont("Tag parity error during snoop.\n");
+			break;
+		default:
+			ret = false;
+		}
+	} else if (BUS_ERROR(ec)) {
+
+		if ((II(ec) != II_MEM && II(ec) != II_IO) || LL(ec) != LL_LG)
+			return false;
+
+		pr_cont("System read data error on a ");
+
+		switch (r4) {
+		case R4_RD:
+			pr_cont("TLB reload.\n");
+			break;
+		case R4_DWR:
+			pr_cont("store.\n");
+			break;
+		case R4_DRD:
+			pr_cont("load.\n");
+			break;
+		default:
+			ret = false;
+		}
+	} else {
+		ret = false;
+	}
+
+	return ret;
+}
+
+static bool f15h_mc0_mce(u16 ec, u8 xec)
+{
+	bool ret = true;
+
+	if (MEM_ERROR(ec)) {
+
+		switch (xec) {
+		case 0x0:
+			pr_cont("Data Array access error.\n");
+			break;
+
+		case 0x1:
+			pr_cont("UC error during a linefill from L2/NB.\n");
+			break;
+
+		case 0x2:
+		case 0x11:
+			pr_cont("STQ access error.\n");
+			break;
+
+		case 0x3:
+			pr_cont("SCB access error.\n");
+			break;
+
+		case 0x10:
+			pr_cont("Tag error.\n");
+			break;
+
+		case 0x12:
+			pr_cont("LDQ access error.\n");
+			break;
+
+		default:
+			ret = false;
+		}
+	} else if (BUS_ERROR(ec)) {
+
+		if (!xec)
+			pr_cont("System Read Data Error.\n");
+		else
+			pr_cont(" Internal error condition type %d.\n", xec);
+	} else if (INT_ERROR(ec)) {
+		if (xec <= 0x1f)
+			pr_cont("Hardware Assert.\n");
+		else
+			ret = false;
+
+	} else
+		ret = false;
+
+	return ret;
+}
+
+static void decode_mc0_mce(struct mce *m)
+{
+	u16 ec = EC(m->status);
+	u8 xec = XEC(m->status, xec_mask);
+
+	pr_emerg(HW_ERR "MC0 Error: ");
+
+	/* TLB error signatures are the same across families */
+	if (TLB_ERROR(ec)) {
+		if (TT(ec) == TT_DATA) {
+			pr_cont("%s TLB %s.\n", LL_MSG(ec),
+				((xec == 2) ? "locked miss"
+					    : (xec ? "multimatch" : "parity")));
+			return;
+		}
+	} else if (fam_ops.mc0_mce(ec, xec))
+		;
+	else
+		pr_emerg(HW_ERR "Corrupted MC0 MCE info?\n");
+}
+
+static bool k8_mc1_mce(u16 ec, u8 xec)
+{
+	u8 ll	 = LL(ec);
+	bool ret = true;
+
+	if (!MEM_ERROR(ec))
+		return false;
+
+	if (ll == 0x2)
+		pr_cont("during a linefill from L2.\n");
+	else if (ll == 0x1) {
+		switch (R4(ec)) {
+		case R4_IRD:
+			pr_cont("Parity error during data load.\n");
+			break;
+
+		case R4_EVICT:
+			pr_cont("Copyback Parity/Victim error.\n");
+			break;
+
+		case R4_SNOOP:
+			pr_cont("Tag Snoop error.\n");
+			break;
+
+		default:
+			ret = false;
+			break;
+		}
+	} else
+		ret = false;
+
+	return ret;
+}
+
+static bool cat_mc1_mce(u16 ec, u8 xec)
+{
+	u8 r4    = R4(ec);
+	bool ret = true;
+
+	if (!MEM_ERROR(ec))
+		return false;
+
+	if (TT(ec) != TT_INSTR)
+		return false;
+
+	if (r4 == R4_IRD)
+		pr_cont("Data/tag array parity error for a tag hit.\n");
+	else if (r4 == R4_SNOOP)
+		pr_cont("Tag error during snoop/victimization.\n");
+	else if (xec == 0x0)
+		pr_cont("Tag parity error from victim castout.\n");
+	else if (xec == 0x2)
+		pr_cont("Microcode patch RAM parity error.\n");
+	else
+		ret = false;
+
+	return ret;
+}
+
+static bool f15h_mc1_mce(u16 ec, u8 xec)
+{
+	bool ret = true;
+
+	if (!MEM_ERROR(ec))
+		return false;
+
+	switch (xec) {
+	case 0x0 ... 0xa:
+		pr_cont("%s.\n", f15h_mc1_mce_desc[xec]);
+		break;
+
+	case 0xd:
+		pr_cont("%s.\n", f15h_mc1_mce_desc[xec-2]);
+		break;
+
+	case 0x10:
+		pr_cont("%s.\n", f15h_mc1_mce_desc[xec-4]);
+		break;
+
+	case 0x11 ... 0x15:
+		pr_cont("Decoder %s parity error.\n", f15h_mc1_mce_desc[xec-4]);
+		break;
+
+	default:
+		ret = false;
+	}
+	return ret;
+}
+
+static void decode_mc1_mce(struct mce *m)
+{
+	u16 ec = EC(m->status);
+	u8 xec = XEC(m->status, xec_mask);
+
+	pr_emerg(HW_ERR "MC1 Error: ");
+
+	if (TLB_ERROR(ec))
+		pr_cont("%s TLB %s.\n", LL_MSG(ec),
+			(xec ? "multimatch" : "parity error"));
+	else if (BUS_ERROR(ec)) {
+		bool k8 = (boot_cpu_data.x86 == 0xf && (m->status & BIT_64(58)));
+
+		pr_cont("during %s.\n", (k8 ? "system linefill" : "NB data read"));
+	} else if (INT_ERROR(ec)) {
+		if (xec <= 0x3f)
+			pr_cont("Hardware Assert.\n");
+		else
+			goto wrong_mc1_mce;
+	} else if (fam_ops.mc1_mce(ec, xec))
+		;
+	else
+		goto wrong_mc1_mce;
+
+	return;
+
+wrong_mc1_mce:
+	pr_emerg(HW_ERR "Corrupted MC1 MCE info?\n");
+}
+
+static bool k8_mc2_mce(u16 ec, u8 xec)
+{
+	bool ret = true;
+
+	if (xec == 0x1)
+		pr_cont(" in the write data buffers.\n");
+	else if (xec == 0x3)
+		pr_cont(" in the victim data buffers.\n");
+	else if (xec == 0x2 && MEM_ERROR(ec))
+		pr_cont(": %s error in the L2 cache tags.\n", R4_MSG(ec));
+	else if (xec == 0x0) {
+		if (TLB_ERROR(ec))
+			pr_cont("%s error in a Page Descriptor Cache or Guest TLB.\n",
+				TT_MSG(ec));
+		else if (BUS_ERROR(ec))
+			pr_cont(": %s/ECC error in data read from NB: %s.\n",
+				R4_MSG(ec), PP_MSG(ec));
+		else if (MEM_ERROR(ec)) {
+			u8 r4 = R4(ec);
+
+			if (r4 >= 0x7)
+				pr_cont(": %s error during data copyback.\n",
+					R4_MSG(ec));
+			else if (r4 <= 0x1)
+				pr_cont(": %s parity/ECC error during data "
+					"access from L2.\n", R4_MSG(ec));
+			else
+				ret = false;
+		} else
+			ret = false;
+	} else
+		ret = false;
+
+	return ret;
+}
+
+static bool f15h_mc2_mce(u16 ec, u8 xec)
+{
+	bool ret = true;
+
+	if (TLB_ERROR(ec)) {
+		if (xec == 0x0)
+			pr_cont("Data parity TLB read error.\n");
+		else if (xec == 0x1)
+			pr_cont("Poison data provided for TLB fill.\n");
+		else
+			ret = false;
+	} else if (BUS_ERROR(ec)) {
+		if (xec > 2)
+			ret = false;
+
+		pr_cont("Error during attempted NB data read.\n");
+	} else if (MEM_ERROR(ec)) {
+		switch (xec) {
+		case 0x4 ... 0xc:
+			pr_cont("%s.\n", f15h_mc2_mce_desc[xec - 0x4]);
+			break;
+
+		case 0x10 ... 0x14:
+			pr_cont("%s.\n", f15h_mc2_mce_desc[xec - 0x7]);
+			break;
+
+		default:
+			ret = false;
+		}
+	} else if (INT_ERROR(ec)) {
+		if (xec <= 0x3f)
+			pr_cont("Hardware Assert.\n");
+		else
+			ret = false;
+	}
+
+	return ret;
+}
+
+static bool f16h_mc2_mce(u16 ec, u8 xec)
+{
+	u8 r4 = R4(ec);
+
+	if (!MEM_ERROR(ec))
+		return false;
+
+	switch (xec) {
+	case 0x04 ... 0x05:
+		pr_cont("%cBUFF parity error.\n", (r4 == R4_RD) ? 'I' : 'O');
+		break;
+
+	case 0x09 ... 0x0b:
+	case 0x0d ... 0x0f:
+		pr_cont("ECC error in L2 tag (%s).\n",
+			((r4 == R4_GEN)   ? "BankReq" :
+			((r4 == R4_SNOOP) ? "Prb"     : "Fill")));
+		break;
+
+	case 0x10 ... 0x19:
+	case 0x1b:
+		pr_cont("ECC error in L2 data array (%s).\n",
+			(((r4 == R4_RD) && !(xec & 0x3)) ? "Hit"  :
+			((r4 == R4_GEN)   ? "Attr" :
+			((r4 == R4_EVICT) ? "Vict" : "Fill"))));
+		break;
+
+	case 0x1c ... 0x1d:
+	case 0x1f:
+		pr_cont("Parity error in L2 attribute bits (%s).\n",
+			((r4 == R4_RD)  ? "Hit"  :
+			((r4 == R4_GEN) ? "Attr" : "Fill")));
+		break;
+
+	default:
+		return false;
+	}
+
+	return true;
+}
+
+static void decode_mc2_mce(struct mce *m)
+{
+	u16 ec = EC(m->status);
+	u8 xec = XEC(m->status, xec_mask);
+
+	pr_emerg(HW_ERR "MC2 Error: ");
+
+	if (!fam_ops.mc2_mce(ec, xec))
+		pr_cont(HW_ERR "Corrupted MC2 MCE info?\n");
+}
+
+static void decode_mc3_mce(struct mce *m)
+{
+	u16 ec = EC(m->status);
+	u8 xec = XEC(m->status, xec_mask);
+
+	if (boot_cpu_data.x86 >= 0x14) {
+		pr_emerg("You shouldn't be seeing MC3 MCE on this cpu family,"
+			 " please report on LKML.\n");
+		return;
+	}
+
+	pr_emerg(HW_ERR "MC3 Error");
+
+	if (xec == 0x0) {
+		u8 r4 = R4(ec);
+
+		if (!BUS_ERROR(ec) || (r4 != R4_DRD && r4 != R4_DWR))
+			goto wrong_mc3_mce;
+
+		pr_cont(" during %s.\n", R4_MSG(ec));
+	} else
+		goto wrong_mc3_mce;
+
+	return;
+
+ wrong_mc3_mce:
+	pr_emerg(HW_ERR "Corrupted MC3 MCE info?\n");
+}
+
+static void decode_mc4_mce(struct mce *m)
+{
+	unsigned int fam = x86_family(m->cpuid);
+	int node_id = topology_die_id(m->extcpu);
+	u16 ec = EC(m->status);
+	u8 xec = XEC(m->status, 0x1f);
+	u8 offset = 0;
+
+	pr_emerg(HW_ERR "MC4 Error (node %d): ", node_id);
+
+	switch (xec) {
+	case 0x0 ... 0xe:
+
+		/* special handling for DRAM ECCs */
+		if (xec == 0x0 || xec == 0x8) {
+			/* no ECCs on F11h */
+			if (fam == 0x11)
+				goto wrong_mc4_mce;
+
+			pr_cont("%s.\n", mc4_mce_desc[xec]);
+
+			if (decode_dram_ecc)
+				decode_dram_ecc(node_id, m);
+			return;
+		}
+		break;
+
+	case 0xf:
+		if (TLB_ERROR(ec))
+			pr_cont("GART Table Walk data error.\n");
+		else if (BUS_ERROR(ec))
+			pr_cont("DMA Exclusion Vector Table Walk error.\n");
+		else
+			goto wrong_mc4_mce;
+		return;
+
+	case 0x19:
+		if (fam == 0x15 || fam == 0x16)
+			pr_cont("Compute Unit Data Error.\n");
+		else
+			goto wrong_mc4_mce;
+		return;
+
+	case 0x1c ... 0x1f:
+		offset = 13;
+		break;
+
+	default:
+		goto wrong_mc4_mce;
+	}
+
+	pr_cont("%s.\n", mc4_mce_desc[xec - offset]);
+	return;
+
+ wrong_mc4_mce:
+	pr_emerg(HW_ERR "Corrupted MC4 MCE info?\n");
+}
+
+static void decode_mc5_mce(struct mce *m)
+{
+	unsigned int fam = x86_family(m->cpuid);
+	u16 ec = EC(m->status);
+	u8 xec = XEC(m->status, xec_mask);
+
+	if (fam == 0xf || fam == 0x11)
+		goto wrong_mc5_mce;
+
+	pr_emerg(HW_ERR "MC5 Error: ");
+
+	if (INT_ERROR(ec)) {
+		if (xec <= 0x1f) {
+			pr_cont("Hardware Assert.\n");
+			return;
+		} else
+			goto wrong_mc5_mce;
+	}
+
+	if (xec == 0x0 || xec == 0xc)
+		pr_cont("%s.\n", mc5_mce_desc[xec]);
+	else if (xec <= 0xd)
+		pr_cont("%s parity error.\n", mc5_mce_desc[xec]);
+	else
+		goto wrong_mc5_mce;
+
+	return;
+
+ wrong_mc5_mce:
+	pr_emerg(HW_ERR "Corrupted MC5 MCE info?\n");
+}
+
+static void decode_mc6_mce(struct mce *m)
+{
+	u8 xec = XEC(m->status, xec_mask);
+
+	pr_emerg(HW_ERR "MC6 Error: ");
+
+	if (xec > 0x5)
+		goto wrong_mc6_mce;
+
+	pr_cont("%s parity error.\n", mc6_mce_desc[xec]);
+	return;
+
+ wrong_mc6_mce:
+	pr_emerg(HW_ERR "Corrupted MC6 MCE info?\n");
+}
+
+/* Decode errors according to Scalable MCA specification */
+static void decode_smca_error(struct mce *m)
+{
+	enum smca_bank_types bank_type = smca_get_bank_type(m->extcpu, m->bank);
+	const char *ip_name;
+	u8 xec = XEC(m->status, xec_mask);
+
+	if (bank_type >= N_SMCA_BANK_TYPES)
+		return;
+
+	if (bank_type == SMCA_RESERVED) {
+		pr_emerg(HW_ERR "Bank %d is reserved.\n", m->bank);
+		return;
+	}
+
+	ip_name = smca_get_long_name(bank_type);
+
+	pr_emerg(HW_ERR "%s Ext. Error Code: %d", ip_name, xec);
+
+	/* Only print the decode of valid error codes */
+	if (xec < smca_mce_descs[bank_type].num_descs)
+		pr_cont(", %s.\n", smca_mce_descs[bank_type].descs[xec]);
+
+	if (bank_type == SMCA_UMC && xec == 0 && decode_dram_ecc)
+		decode_dram_ecc(topology_die_id(m->extcpu), m);
+}
+
+static inline void amd_decode_err_code(u16 ec)
+{
+	if (INT_ERROR(ec)) {
+		pr_emerg(HW_ERR "internal: %s\n", UU_MSG(ec));
+		return;
+	}
+
+	pr_emerg(HW_ERR "cache level: %s", LL_MSG(ec));
+
+	if (BUS_ERROR(ec))
+		pr_cont(", mem/io: %s", II_MSG(ec));
+	else
+		pr_cont(", tx: %s", TT_MSG(ec));
+
+	if (MEM_ERROR(ec) || BUS_ERROR(ec)) {
+		pr_cont(", mem-tx: %s", R4_MSG(ec));
+
+		if (BUS_ERROR(ec))
+			pr_cont(", part-proc: %s (%s)", PP_MSG(ec), TO_MSG(ec));
+	}
+
+	pr_cont("\n");
+}
+
+static const char *decode_error_status(struct mce *m)
+{
+	if (m->status & MCI_STATUS_UC) {
+		if (m->status & MCI_STATUS_PCC)
+			return "System Fatal error.";
+		if (m->mcgstatus & MCG_STATUS_RIPV)
+			return "Uncorrected, software restartable error.";
+		return "Uncorrected, software containable error.";
+	}
+
+	if (m->status & MCI_STATUS_DEFERRED)
+		return "Deferred error, no action required.";
+
+	return "Corrected error, no action required.";
+}
+
+static int
+amd_decode_mce(struct notifier_block *nb, unsigned long val, void *data)
+{
+	struct mce *m = (struct mce *)data;
+	unsigned int fam = x86_family(m->cpuid);
+	int ecc;
+
+	if (m->kflags & MCE_HANDLED_CEC)
+		return NOTIFY_DONE;
+
+	pr_emerg(HW_ERR "%s\n", decode_error_status(m));
+
+	pr_emerg(HW_ERR "CPU:%d (%x:%x:%x) MC%d_STATUS[%s|%s|%s|%s|%s",
+		m->extcpu,
+		fam, x86_model(m->cpuid), x86_stepping(m->cpuid),
+		m->bank,
+		((m->status & MCI_STATUS_OVER)	? "Over"  : "-"),
+		((m->status & MCI_STATUS_UC)	? "UE"	  :
+		 (m->status & MCI_STATUS_DEFERRED) ? "-"  : "CE"),
+		((m->status & MCI_STATUS_MISCV)	? "MiscV" : "-"),
+		((m->status & MCI_STATUS_ADDRV)	? "AddrV" : "-"),
+		((m->status & MCI_STATUS_PCC)	? "PCC"	  : "-"));
+
+	if (boot_cpu_has(X86_FEATURE_SMCA)) {
+		u32 low, high;
+		u32 addr = MSR_AMD64_SMCA_MCx_CONFIG(m->bank);
+
+		if (!rdmsr_safe(addr, &low, &high) &&
+		    (low & MCI_CONFIG_MCAX))
+			pr_cont("|%s", ((m->status & MCI_STATUS_TCC) ? "TCC" : "-"));
+
+		pr_cont("|%s", ((m->status & MCI_STATUS_SYNDV) ? "SyndV" : "-"));
+	}
+
+	/* do the two bits[14:13] together */
+	ecc = (m->status >> 45) & 0x3;
+	if (ecc)
+		pr_cont("|%sECC", ((ecc == 2) ? "C" : "U"));
+
+	if (fam >= 0x15) {
+		pr_cont("|%s", (m->status & MCI_STATUS_DEFERRED ? "Deferred" : "-"));
+
+		/* F15h, bank4, bit 43 is part of McaStatSubCache. */
+		if (fam != 0x15 || m->bank != 4)
+			pr_cont("|%s", (m->status & MCI_STATUS_POISON ? "Poison" : "-"));
+	}
+
+	if (fam >= 0x17)
+		pr_cont("|%s", (m->status & MCI_STATUS_SCRUB ? "Scrub" : "-"));
+
+	pr_cont("]: 0x%016llx\n", m->status);
+
+	if (m->status & MCI_STATUS_ADDRV)
+		pr_emerg(HW_ERR "Error Addr: 0x%016llx\n", m->addr);
+
+	if (m->ppin)
+		pr_emerg(HW_ERR "PPIN: 0x%016llx\n", m->ppin);
+
+	if (boot_cpu_has(X86_FEATURE_SMCA)) {
+		pr_emerg(HW_ERR "IPID: 0x%016llx", m->ipid);
+
+		if (m->status & MCI_STATUS_SYNDV)
+			pr_cont(", Syndrome: 0x%016llx", m->synd);
+
+		pr_cont("\n");
+
+		decode_smca_error(m);
+		goto err_code;
+	}
+
+	if (m->tsc)
+		pr_emerg(HW_ERR "TSC: %llu\n", m->tsc);
+
+	/* Doesn't matter which member to test. */
+	if (!fam_ops.mc0_mce)
+		goto err_code;
+
+	switch (m->bank) {
+	case 0:
+		decode_mc0_mce(m);
+		break;
+
+	case 1:
+		decode_mc1_mce(m);
+		break;
+
+	case 2:
+		decode_mc2_mce(m);
+		break;
+
+	case 3:
+		decode_mc3_mce(m);
+		break;
+
+	case 4:
+		decode_mc4_mce(m);
+		break;
+
+	case 5:
+		decode_mc5_mce(m);
+		break;
+
+	case 6:
+		decode_mc6_mce(m);
+		break;
+
+	default:
+		break;
+	}
+
+ err_code:
+	amd_decode_err_code(m->status & 0xffff);
+
+	m->kflags |= MCE_HANDLED_EDAC;
+	return NOTIFY_OK;
+}
+
+static struct notifier_block amd_mce_dec_nb = {
+	.notifier_call	= amd_decode_mce,
+	.priority	= MCE_PRIO_EDAC,
+};
+
+static int __init mce_amd_init(void)
+{
+	struct cpuinfo_x86 *c = &boot_cpu_data;
+
+	if (c->x86_vendor != X86_VENDOR_AMD &&
+	    c->x86_vendor != X86_VENDOR_HYGON)
+		return -ENODEV;
+
+	if (cpu_feature_enabled(X86_FEATURE_HYPERVISOR))
+		return -ENODEV;
+
+	if (boot_cpu_has(X86_FEATURE_SMCA)) {
+		xec_mask = 0x3f;
+		goto out;
+	}
+
+	switch (c->x86) {
+	case 0xf:
+		fam_ops.mc0_mce = k8_mc0_mce;
+		fam_ops.mc1_mce = k8_mc1_mce;
+		fam_ops.mc2_mce = k8_mc2_mce;
+		break;
+
+	case 0x10:
+		fam_ops.mc0_mce = f10h_mc0_mce;
+		fam_ops.mc1_mce = k8_mc1_mce;
+		fam_ops.mc2_mce = k8_mc2_mce;
+		break;
+
+	case 0x11:
+		fam_ops.mc0_mce = k8_mc0_mce;
+		fam_ops.mc1_mce = k8_mc1_mce;
+		fam_ops.mc2_mce = k8_mc2_mce;
+		break;
+
+	case 0x12:
+		fam_ops.mc0_mce = f12h_mc0_mce;
+		fam_ops.mc1_mce = k8_mc1_mce;
+		fam_ops.mc2_mce = k8_mc2_mce;
+		break;
+
+	case 0x14:
+		fam_ops.mc0_mce = cat_mc0_mce;
+		fam_ops.mc1_mce = cat_mc1_mce;
+		fam_ops.mc2_mce = k8_mc2_mce;
+		break;
+
+	case 0x15:
+		xec_mask = c->x86_model == 0x60 ? 0x3f : 0x1f;
+
+		fam_ops.mc0_mce = f15h_mc0_mce;
+		fam_ops.mc1_mce = f15h_mc1_mce;
+		fam_ops.mc2_mce = f15h_mc2_mce;
+		break;
+
+	case 0x16:
+		xec_mask = 0x1f;
+		fam_ops.mc0_mce = cat_mc0_mce;
+		fam_ops.mc1_mce = cat_mc1_mce;
+		fam_ops.mc2_mce = f16h_mc2_mce;
+		break;
+
+	case 0x17:
+	case 0x18:
+		pr_warn_once("Decoding supported only on Scalable MCA processors.\n");
+		return -EINVAL;
+
+	default:
+		printk(KERN_WARNING "Huh? What family is it: 0x%x?!\n", c->x86);
+		return -EINVAL;
+	}
+
+out:
+	pr_info("MCE: In-kernel MCE decoding enabled.\n");
+
+	mce_register_decode_chain(&amd_mce_dec_nb);
+
+	return 0;
+}
+early_initcall(mce_amd_init);
+
+#ifdef MODULE
+static void __exit mce_amd_exit(void)
+{
+	mce_unregister_decode_chain(&amd_mce_dec_nb);
+}
+
+MODULE_DESCRIPTION("AMD MCE decoder");
+MODULE_ALIAS("edac-mce-amd");
+MODULE_LICENSE("GPL");
+module_exit(mce_amd_exit);
+#endif