- 'apei_estatus_for_each_section'
- 'ata_for_each_dev'
- 'ata_for_each_link'
+ - '__ata_qc_for_each'
+ - 'ata_qc_for_each'
+ - 'ata_qc_for_each_raw'
+ - 'ata_qc_for_each_with_internal'
- 'ax25_for_each'
- 'ax25_uid_for_each'
- 'bio_for_each_integrity_vec'
- 'blk_queue_for_each_rl'
- 'bond_for_each_slave'
- 'bond_for_each_slave_rcu'
+ - 'bpf_for_each_spilled_reg'
- 'btree_for_each_safe128'
- 'btree_for_each_safe32'
- 'btree_for_each_safe64'
- 'drm_atomic_crtc_for_each_plane'
- 'drm_atomic_crtc_state_for_each_plane'
- 'drm_atomic_crtc_state_for_each_plane_state'
+ - 'drm_atomic_for_each_plane_damage'
+ - 'drm_connector_for_each_possible_encoder'
- 'drm_for_each_connector_iter'
- 'drm_for_each_crtc'
- 'drm_for_each_encoder'
- 'for_each_bio'
- 'for_each_board_func_rsrc'
- 'for_each_bvec'
+ - 'for_each_card_components'
+ - 'for_each_card_links'
+ - 'for_each_card_links_safe'
+ - 'for_each_card_prelinks'
+ - 'for_each_card_rtds'
+ - 'for_each_card_rtds_safe'
+ - 'for_each_cgroup_storage_type'
- 'for_each_child_of_node'
- 'for_each_clear_bit'
- 'for_each_clear_bit_from'
- 'for_each_cmsghdr'
- 'for_each_compatible_node'
+ - 'for_each_component_dais'
+ - 'for_each_component_dais_safe'
+ - 'for_each_comp_order'
- 'for_each_console'
- 'for_each_cpu'
- 'for_each_cpu_and'
- 'for_each_cpu_wrap'
- 'for_each_dev_addr'
- 'for_each_dma_cap_mask'
+ - 'for_each_dpcm_be'
+ - 'for_each_dpcm_be_rollback'
+ - 'for_each_dpcm_be_safe'
+ - 'for_each_dpcm_fe'
- 'for_each_drhd_unit'
- 'for_each_dss_dev'
- 'for_each_efi_memory_desc'
- 'for_each_iommu'
- 'for_each_ip_tunnel_rcu'
- 'for_each_irq_nr'
+ - 'for_each_link_codecs'
- 'for_each_lru'
- 'for_each_matching_node'
- 'for_each_matching_node_and_match'
- 'for_each_mem_range_rev'
- 'for_each_migratetype_order'
- 'for_each_msi_entry'
+ - 'for_each_msi_entry_safe'
- 'for_each_net'
- 'for_each_netdev'
- 'for_each_netdev_continue'
- 'for_each_node_with_property'
- 'for_each_of_allnodes'
- 'for_each_of_allnodes_from'
+ - 'for_each_of_cpu_node'
- 'for_each_of_pci_range'
- 'for_each_old_connector_in_state'
- 'for_each_old_crtc_in_state'
- 'for_each_oldnew_connector_in_state'
- 'for_each_oldnew_crtc_in_state'
- 'for_each_oldnew_plane_in_state'
+ - 'for_each_oldnew_plane_in_state_reverse'
- 'for_each_oldnew_private_obj_in_state'
- 'for_each_old_plane_in_state'
- 'for_each_old_private_obj_in_state'
- 'for_each_process'
- 'for_each_process_thread'
- 'for_each_property_of_node'
+ - 'for_each_registered_fb'
- 'for_each_reserved_mem_region'
- - 'for_each_resv_unavail_range'
+ - 'for_each_rtd_codec_dai'
+ - 'for_each_rtd_codec_dai_rollback'
- 'for_each_rtdcom'
- 'for_each_rtdcom_safe'
- 'for_each_set_bit'
- 'for_each_set_bit_from'
- 'for_each_sg'
- 'for_each_sg_page'
+ - 'for_each_sibling_event'
- '__for_each_thread'
- 'for_each_thread'
- 'for_each_zone'
- 'hlist_nulls_for_each_entry_from'
- 'hlist_nulls_for_each_entry_rcu'
- 'hlist_nulls_for_each_entry_safe'
+ - 'i3c_bus_for_each_i2cdev'
+ - 'i3c_bus_for_each_i3cdev'
- 'ide_host_for_each_port'
- 'ide_port_for_each_dev'
- 'ide_port_for_each_present_dev'
- 'kvm_for_each_memslot'
- 'kvm_for_each_vcpu'
- 'list_for_each'
+ - 'list_for_each_codec'
+ - 'list_for_each_codec_safe'
- 'list_for_each_entry'
- 'list_for_each_entry_continue'
- 'list_for_each_entry_continue_rcu'
- 'list_for_each_entry_continue_reverse'
- 'list_for_each_entry_from'
+ - 'list_for_each_entry_from_rcu'
- 'list_for_each_entry_from_reverse'
- 'list_for_each_entry_lockless'
- 'list_for_each_entry_rcu'
- 'media_device_for_each_intf'
- 'media_device_for_each_link'
- 'media_device_for_each_pad'
+ - 'nanddev_io_for_each_page'
- 'netdev_for_each_lower_dev'
- 'netdev_for_each_lower_private'
- 'netdev_for_each_lower_private_rcu'
- 'sk_nulls_for_each'
- 'sk_nulls_for_each_from'
- 'sk_nulls_for_each_rcu'
+ - 'snd_array_for_each'
- 'snd_pcm_group_for_each_entry'
- 'snd_soc_dapm_widget_for_each_path'
- 'snd_soc_dapm_widget_for_each_path_safe'
- 'snd_soc_dapm_widget_for_each_sink_path'
- 'snd_soc_dapm_widget_for_each_source_path'
- 'tb_property_for_each'
+ - 'tcf_exts_for_each_action'
- 'udp_portaddr_for_each_entry'
- 'udp_portaddr_for_each_entry_rcu'
- 'usb_hub_for_each_child'
- 'v4l2_m2m_for_each_dst_buf_safe'
- 'v4l2_m2m_for_each_src_buf'
- 'v4l2_m2m_for_each_src_buf_safe'
+ - 'virtio_device_for_each_vq'
+ - 'xa_for_each'
+ - 'xas_for_each'
+ - 'xas_for_each_conflict'
+ - 'xas_for_each_marked'
- 'zorro_for_each_dev'
#IncludeBlocks: Preserve # Unknown to clang-format-5.0
cpld3_version
Date: November 2018
-KernelVersion: 4.21
+KernelVersion: 5.0
Contact: Vadim Pasternak <vadimpmellanox.com>
Description: These files show with which CPLD versions have been burned
on LED board.
jtag_enable
Date: November 2018
-KernelVersion: 4.21
+KernelVersion: 5.0
Contact: Vadim Pasternak <vadimpmellanox.com>
Description: These files enable and disable the access to the JTAG domain.
By default access to the JTAG domain is disabled.
reset_voltmon_upgrade_fail
Date: November 2018
-KernelVersion: 4.21
+KernelVersion: 5.0
Contact: Vadim Pasternak <vadimpmellanox.com>
Description: These files show the system reset cause, as following: ComEx
power fail, reset from ComEx, system platform reset, reset
------------------------------
A: YES. BPF instructions, arguments to BPF programs, set of helper
functions and their arguments, recognized return codes are all part
-of ABI. However when tracing programs are using bpf_probe_read() helper
-to walk kernel internal datastructures and compile with kernel
-internal headers these accesses can and will break with newer
-kernels. The union bpf_attr -> kern_version is checked at load time
-to prevent accidentally loading kprobe-based bpf programs written
-for a different kernel. Networking programs don't do kern_version check.
+of ABI. However there is one specific exception to tracing programs
+which are using helpers like bpf_probe_read() to walk kernel internal
+data structures and compile with kernel internal headers. Both of these
+kernel internals are subject to change and can break with newer kernels
+such that the program needs to be adapted accordingly.
Q: How much stack space a BPF program uses?
-------------------------------------------
Sometimes you need to ensure that a subsequent call to :c:func:`xa_store`
will not need to allocate memory. The :c:func:`xa_reserve` function
-will store a reserved entry at the indicated index. Users of the normal
-API will see this entry as containing ``NULL``. If you do not need to
-use the reserved entry, you can call :c:func:`xa_release` to remove the
-unused entry. If another user has stored to the entry in the meantime,
-:c:func:`xa_release` will do nothing; if instead you want the entry to
-become ``NULL``, you should use :c:func:`xa_erase`.
+will store a reserved entry at the indicated index. Users of the
+normal API will see this entry as containing ``NULL``. If you do
+not need to use the reserved entry, you can call :c:func:`xa_release`
+to remove the unused entry. If another user has stored to the entry
+in the meantime, :c:func:`xa_release` will do nothing; if instead you
+want the entry to become ``NULL``, you should use :c:func:`xa_erase`.
+Using :c:func:`xa_insert` on a reserved entry will fail.
If all entries in the array are ``NULL``, the :c:func:`xa_empty` function
will return ``true``.
* :c:func:`xa_store_bh`
* :c:func:`xa_store_irq`
* :c:func:`xa_insert`
+ * :c:func:`xa_insert_bh`
+ * :c:func:`xa_insert_irq`
* :c:func:`xa_erase`
* :c:func:`xa_erase_bh`
* :c:func:`xa_erase_irq`
quiet_cmd_mk_schema = SCHEMA $@
cmd_mk_schema = $(DT_MK_SCHEMA) $(DT_MK_SCHEMA_FLAGS) -o $@ $(filter-out FORCE, $^)
-DT_DOCS = $(shell cd $(srctree)/$(src) && find * -name '*.yaml')
+DT_DOCS = $(shell \
+ cd $(srctree)/$(src) && \
+ find * \( -name '*.yaml' ! -name $(DT_TMP_SCHEMA) \) \
+ )
+
DT_SCHEMA_FILES ?= $(addprefix $(src)/,$(DT_DOCS))
extra-y += $(patsubst $(src)/%.yaml,%.example.dts, $(DT_SCHEMA_FILES))
===========================================
[1] ARM Linux Kernel documentation - CPUs bindings
- Documentation/devicetree/bindings/arm/cpus.txt
+ Documentation/devicetree/bindings/arm/cpus.yaml
===========================================
[1] ARM Linux Kernel documentation - CPUs bindings
- Documentation/devicetree/bindings/arm/cpus.txt
+ Documentation/devicetree/bindings/arm/cpus.yaml
[2] ARM Linux Kernel documentation - PSCI bindings
Documentation/devicetree/bindings/arm/psci.txt
Required properties:
- compatible: standard compatible string for a Primecell peripheral,
- see Documentation/devicetree/bindings/arm/primecell.txt
+ see Documentation/devicetree/bindings/arm/primecell.yaml
for more details
should be: "arm,sp810", "arm,primecell"
===============================================================================
[1] ARM Linux kernel documentation
- Documentation/devicetree/bindings/arm/cpus.txt
+ Documentation/devicetree/bindings/arm/cpus.yaml
Each clock is assigned an identifier and client nodes use this identifier
to specify the clock which they consume.
-All these identifier could be found in <dt-bindings/clock/marvell-mmp2.h>.
+All these identifiers could be found in <dt-bindings/clock/marvell,mmp2.h>.
* ARM PrimeCell Color LCD Controller PL110/PL111
-See also Documentation/devicetree/bindings/arm/primecell.txt
+See also Documentation/devicetree/bindings/arm/primecell.yaml
Required properties:
reg = <0x04300000 0x20000>;
reg-names = "kgsl_3d0_reg_memory";
interrupts = <GIC_SPI 80 0>;
- interrupt-names = "kgsl_3d0_irq";
clock-names =
"core",
"iface",
"marvell,armada-8k-gpio" should be used for the Armada 7K and 8K
SoCs (either from AP or CP), see
- Documentation/devicetree/bindings/arm/marvell/cp110-system-controller0.txt
- and
Documentation/devicetree/bindings/arm/marvell/ap806-system-controller.txt
for specific details about the offset property.
PPI affinity can be expressed as a single "ppi-partitions" node,
containing a set of sub-nodes, each with the following property:
- affinity: Should be a list of phandles to CPU nodes (as described in
-Documentation/devicetree/bindings/arm/cpus.txt).
+ Documentation/devicetree/bindings/arm/cpus.yaml).
GICv3 has one or more Interrupt Translation Services (ITS) that are
used to route Message Signalled Interrupts (MSI) to the CPUs.
- compatible : "olpc,ap-sp"
- reg : base address and length of SoC's WTM registers
- interrupts : SP-AP interrupt
-- clocks : phandle + clock-specifier for the clock that drives the WTM
-- clock-names: should be "sp"
Example:
ap-sp@d4290000 {
compatible = "olpc,ap-sp";
reg = <0xd4290000 0x1000>;
interrupts = <40>;
- clocks = <&soc_clocks MMP2_CLK_SP>;
- clock-names = "sp";
}
= EXAMPLE
The following example represents the GLINK RPM node on a MSM8996 device, with
the function for the "rpm_request" channel defined, which is used for
-regualtors and root clocks.
+regulators and root clocks.
apcs_glb: mailbox@9820000 {
compatible = "qcom,msm8996-apcs-hmss-global";
- qcom,local-pid:
Usage: required
Value type: <u32>
- Definition: specifies the identfier of the local endpoint of this edge
+ Definition: specifies the identifier of the local endpoint of this edge
- qcom,remote-pid:
Usage: required
Value type: <u32>
- Definition: specifies the identfier of the remote endpoint of this edge
+ Definition: specifies the identifier of the remote endpoint of this edge
= SUBNODES
Each SMP2P pair contain a set of inbound and outbound entries, these are
be preserved until there actually is some text is output to the console.
This option causes fbcon to bind immediately to the fbdev device.
+7. fbcon=logo-pos:<location>
+
+ The only possible 'location' is 'center' (without quotes), and when
+ given, the bootup logo is moved from the default top-left corner
+ location to the center of the framebuffer. If more than one logo is
+ displayed due to multiple CPUs, the collected line of logos is moved
+ as a whole.
+
C. Attaching, Detaching and Unloading
Before going on to how to attach, detach and unload the framebuffer console, an
batman-adv
can
can_ucan_protocol
- dpaa2/index
- e100
- e1000
- e1000e
- fm10k
- igb
- igbvf
- ixgb
- ixgbe
- ixgbevf
- i40e
- iavf
- ice
+ device_drivers/freescale/dpaa2/index
+ device_drivers/intel/e100
+ device_drivers/intel/e1000
+ device_drivers/intel/e1000e
+ device_drivers/intel/fm10k
+ device_drivers/intel/igb
+ device_drivers/intel/igbvf
+ device_drivers/intel/ixgb
+ device_drivers/intel/ixgbe
+ device_drivers/intel/ixgbevf
+ device_drivers/intel/i40e
+ device_drivers/intel/iavf
+ device_drivers/intel/ice
kapi
z8530book
msg_zerocopy
size should be set when the call is begun. tx_total_len may not be less
than zero.
- (*) Check to see the completion state of a call so that the caller can assess
- whether it needs to be retried.
-
- enum rxrpc_call_completion {
- RXRPC_CALL_SUCCEEDED,
- RXRPC_CALL_REMOTELY_ABORTED,
- RXRPC_CALL_LOCALLY_ABORTED,
- RXRPC_CALL_LOCAL_ERROR,
- RXRPC_CALL_NETWORK_ERROR,
- };
-
- int rxrpc_kernel_check_call(struct socket *sock, struct rxrpc_call *call,
- enum rxrpc_call_completion *_compl,
- u32 *_abort_code);
-
- On return, -EINPROGRESS will be returned if the call is still ongoing; if
- it is finished, *_compl will be set to indicate the manner of completion,
- *_abort_code will be set to any abort code that occurred. 0 will be
- returned on a successful completion, -ECONNABORTED will be returned if the
- client failed due to a remote abort and anything else will return an
- appropriate error code.
-
- The caller should look at this information to decide if it's worth
- retrying the call.
-
- (*) Retry a client call.
-
- int rxrpc_kernel_retry_call(struct socket *sock,
- struct rxrpc_call *call,
- struct sockaddr_rxrpc *srx,
- struct key *key);
-
- This attempts to partially reinitialise a call and submit it again while
- reusing the original call's Tx queue to avoid the need to repackage and
- re-encrypt the data to be sent. call indicates the call to retry, srx the
- new address to send it to and key the encryption key to use for signing or
- encrypting the packets.
-
- For this to work, the first Tx data packet must still be in the transmit
- queue, and currently this is only permitted for local and network errors
- and the call must not have been aborted. Any partially constructed Tx
- packet is left as is and can continue being filled afterwards.
-
- It returns 0 if the call was requeued and an error otherwise.
-
(*) Get call RTT.
u64 rxrpc_kernel_get_rtt(struct socket *sock, struct rxrpc_call *call);
to the accept queue.
-TCP Fast Open
+* TcpEstabResets
+Defined in `RFC1213 tcpEstabResets`_.
+
+.. _RFC1213 tcpEstabResets: https://tools.ietf.org/html/rfc1213#page-48
+
+* TcpAttemptFails
+Defined in `RFC1213 tcpAttemptFails`_.
+
+.. _RFC1213 tcpAttemptFails: https://tools.ietf.org/html/rfc1213#page-48
+
+* TcpOutRsts
+Defined in `RFC1213 tcpOutRsts`_. The RFC says this counter indicates
+the 'segments sent containing the RST flag', but in linux kernel, this
+couner indicates the segments kerenl tried to send. The sending
+process might be failed due to some errors (e.g. memory alloc failed).
+
+.. _RFC1213 tcpOutRsts: https://tools.ietf.org/html/rfc1213#page-52
+
+
+TCP Fast Path
============
When kernel receives a TCP packet, it has two paths to handler the
packet, one is fast path, another is slow path. The comment in kernel
TCP abort
========
-
-
* TcpExtTCPAbortOnData
It means TCP layer has data in flight, but need to close the
connection. So TCP layer sends a RST to the other side, indicate the
stack of kernel will increase TcpExtTCPSACKReorder for both of the
above scenarios.
-
DSACK
=====
The DSACK is defined in `RFC2883`_. The receiver uses DSACK to report
DSACK to the sender.
* TcpExtTCPDSACKRecv
-The TCP stack receives a DSACK, which indicate an acknowledged
+The TCP stack receives a DSACK, which indicates an acknowledged
duplicate packet is received.
* TcpExtTCPDSACKOfoRecv
The TCP stack receives a DSACK, which indicate an out of order
duplicate packet is received.
+invalid SACK and DSACK
+====================
+When a SACK (or DSACK) block is invalid, a corresponding counter would
+be updated. The validation method is base on the start/end sequence
+number of the SACK block. For more details, please refer the comment
+of the function tcp_is_sackblock_valid in the kernel source code. A
+SACK option could have up to 4 blocks, they are checked
+individually. E.g., if 3 blocks of a SACk is invalid, the
+corresponding counter would be updated 3 times. The comment of the
+`Add counters for discarded SACK blocks`_ patch has additional
+explaination:
+
+.. _Add counters for discarded SACK blocks: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=18f02545a9a16c9a89778b91a162ad16d510bb32
+
+* TcpExtTCPSACKDiscard
+This counter indicates how many SACK blocks are invalid. If the invalid
+SACK block is caused by ACK recording, the TCP stack will only ignore
+it and won't update this counter.
+
+* TcpExtTCPDSACKIgnoredOld and TcpExtTCPDSACKIgnoredNoUndo
+When a DSACK block is invalid, one of these two counters would be
+updated. Which counter will be updated depends on the undo_marker flag
+of the TCP socket. If the undo_marker is not set, the TCP stack isn't
+likely to re-transmit any packets, and we still receive an invalid
+DSACK block, the reason might be that the packet is duplicated in the
+middle of the network. In such scenario, TcpExtTCPDSACKIgnoredNoUndo
+will be updated. If the undo_marker is set, TcpExtTCPDSACKIgnoredOld
+will be updated. As implied in its name, it might be an old packet.
+
+SACK shift
+=========
+The linux networking stack stores data in sk_buff struct (skb for
+short). If a SACK block acrosses multiple skb, the TCP stack will try
+to re-arrange data in these skb. E.g. if a SACK block acknowledges seq
+10 to 15, skb1 has seq 10 to 13, skb2 has seq 14 to 20. The seq 14 and
+15 in skb2 would be moved to skb1. This operation is 'shift'. If a
+SACK block acknowledges seq 10 to 20, skb1 has seq 10 to 13, skb2 has
+seq 14 to 20. All data in skb2 will be moved to skb1, and skb2 will be
+discard, this operation is 'merge'.
+
+* TcpExtTCPSackShifted
+A skb is shifted
+
+* TcpExtTCPSackMerged
+A skb is merged
+
+* TcpExtTCPSackShiftFallback
+A skb should be shifted or merged, but the TCP stack doesn't do it for
+some reasons.
+
TCP out of order
===============
* TcpExtTCPOFOQueue
.. _RFC 5961 section 4.2: https://tools.ietf.org/html/rfc5961#page-9
.. _RFC 5961 section 5.2: https://tools.ietf.org/html/rfc5961#page-11
+TCP receive window
+=================
+* TcpExtTCPWantZeroWindowAdv
+Depending on current memory usage, the TCP stack tries to set receive
+window to zero. But the receive window might still be a no-zero
+value. For example, if the previous window size is 10, and the TCP
+stack receives 3 bytes, the current window size would be 7 even if the
+window size calculated by the memory usage is zero.
+
+* TcpExtTCPToZeroWindowAdv
+The TCP receive window is set to zero from a no-zero value.
+
+* TcpExtTCPFromZeroWindowAdv
+The TCP receive window is set to no-zero value from zero.
+
+
+Delayed ACK
+==========
+The TCP Delayed ACK is a technique which is used for reducing the
+packet count in the network. For more details, please refer the
+`Delayed ACK wiki`_
+
+.. _Delayed ACK wiki: https://en.wikipedia.org/wiki/TCP_delayed_acknowledgment
+
+* TcpExtDelayedACKs
+A delayed ACK timer expires. The TCP stack will send a pure ACK packet
+and exit the delayed ACK mode.
+
+* TcpExtDelayedACKLocked
+A delayed ACK timer expires, but the TCP stack can't send an ACK
+immediately due to the socket is locked by a userspace program. The
+TCP stack will send a pure ACK later (after the userspace program
+unlock the socket). When the TCP stack sends the pure ACK later, the
+TCP stack will also update TcpExtDelayedACKs and exit the delayed ACK
+mode.
+
+* TcpExtDelayedACKLost
+It will be updated when the TCP stack receives a packet which has been
+ACKed. A Delayed ACK loss might cause this issue, but it would also be
+triggered by other reasons, such as a packet is duplicated in the
+network.
+
+Tail Loss Probe (TLP)
+===================
+TLP is an algorithm which is used to detect TCP packet loss. For more
+details, please refer the `TLP paper`_.
+
+.. _TLP paper: https://tools.ietf.org/html/draft-dukkipati-tcpm-tcp-loss-probe-01
+
+* TcpExtTCPLossProbes
+A TLP probe packet is sent.
+
+* TcpExtTCPLossProbeRecovery
+A packet loss is detected and recovered by TLP.
examples
=======
Hardware time stamping must also be initialized for each device driver
that is expected to do hardware time stamping. The parameter is defined in
-/include/linux/net_tstamp.h as:
+include/uapi/linux/net_tstamp.h as:
struct hwtstamp_config {
int flags; /* no flags defined right now, must be zero */
HWTSTAMP_FILTER_PTP_V1_L4_EVENT,
/* for the complete list of values, please check
- * the include file /include/linux/net_tstamp.h
+ * the include file include/uapi/linux/net_tstamp.h
*/
};
dentry-state:
-From linux/fs/dentry.c:
+From linux/include/linux/dcache.h:
--------------------------------------------------------------
-struct {
+struct dentry_stat_t dentry_stat {
int nr_dentry;
int nr_unused;
int age_limit; /* age in seconds */
int want_pages; /* pages requested by system */
- int dummy[2];
-} dentry_stat = {0, 0, 45, 0,};
---------------------------------------------------------------
-
-Dentries are dynamically allocated and deallocated, and
-nr_dentry seems to be 0 all the time. Hence it's safe to
-assume that only nr_unused, age_limit and want_pages are
-used. Nr_unused seems to be exactly what its name says.
+ int nr_negative; /* # of unused negative dentries */
+ int dummy; /* Reserved for future use */
+};
+--------------------------------------------------------------
+
+Dentries are dynamically allocated and deallocated.
+
+nr_dentry shows the total number of dentries allocated (active
++ unused). nr_unused shows the number of dentries that are not
+actively used, but are saved in the LRU list for future reuse.
+
Age_limit is the age in seconds after which dcache entries
can be reclaimed when memory is short and want_pages is
nonzero when shrink_dcache_pages() has been called and the
dcache isn't pruned yet.
+nr_negative shows the number of unused dentries that are also
+negative dentries which do not mapped to actual files.
+
==============================================================
dquot-max & dquot-nr:
Tony Luck <tony.luck@intel.com>
Vikas Shivappa <vikas.shivappa@intel.com>
-This feature is enabled by the CONFIG_X86_RESCTRL and the x86 /proc/cpuinfo
+This feature is enabled by the CONFIG_X86_CPU_RESCTRL and the x86 /proc/cpuinfo
flag bits:
RDT (Resource Director Technology) Allocation - "rdt_a"
CAT (Cache Allocation Technology) - "cat_l3", "cat_l2"
F: include/linux/bcm963xx_tag.h
BROADCOM BNX2 GIGABIT ETHERNET DRIVER
-M: Rasesh Mody <rasesh.mody@cavium.com>
-M: Dept-GELinuxNICDev@cavium.com
+M: Rasesh Mody <rmody@marvell.com>
+M: GR-Linux-NIC-Dev@marvell.com
L: netdev@vger.kernel.org
S: Supported
F: drivers/net/ethernet/broadcom/bnx2.*
F: drivers/scsi/bnx2i/
BROADCOM BNX2X 10 GIGABIT ETHERNET DRIVER
-M: Ariel Elior <ariel.elior@cavium.com>
-M: Sudarsana Kalluru <sudarsana.kalluru@cavium.com>
-M: everest-linux-l2@cavium.com
+M: Ariel Elior <aelior@marvell.com>
+M: Sudarsana Kalluru <skalluru@marvell.com>
+M: GR-everest-linux-l2@marvell.com
L: netdev@vger.kernel.org
S: Supported
F: drivers/net/ethernet/broadcom/bnx2x/
F: drivers/scsi/bfa/
BROCADE BNA 10 GIGABIT ETHERNET DRIVER
-M: Rasesh Mody <rasesh.mody@cavium.com>
-M: Sudarsana Kalluru <sudarsana.kalluru@cavium.com>
-M: Dept-GELinuxNICDev@cavium.com
+M: Rasesh Mody <rmody@marvell.com>
+M: Sudarsana Kalluru <skalluru@marvell.com>
+M: GR-Linux-NIC-Dev@marvell.com
L: netdev@vger.kernel.org
S: Supported
F: drivers/net/ethernet/brocade/bna/
F: drivers/i2c/busses/i2c-thunderx*
CAVIUM LIQUIDIO NETWORK DRIVER
-M: Derek Chickles <derek.chickles@caviumnetworks.com>
-M: Satanand Burla <satananda.burla@caviumnetworks.com>
-M: Felix Manlunas <felix.manlunas@caviumnetworks.com>
-M: Raghu Vatsavayi <raghu.vatsavayi@caviumnetworks.com>
+M: Derek Chickles <dchickles@marvell.com>
+M: Satanand Burla <sburla@marvell.com>
+M: Felix Manlunas <fmanlunas@marvell.com>
L: netdev@vger.kernel.org
W: http://www.cavium.com
S: Supported
CPU POWER MONITORING SUBSYSTEM
M: Thomas Renninger <trenn@suse.com>
M: Shuah Khan <shuah@kernel.org>
+M: Shuah Khan <skhan@linuxfoundation.org>
L: linux-pm@vger.kernel.org
S: Maintained
F: tools/power/cpupower/
KERNEL SELFTEST FRAMEWORK
M: Shuah Khan <shuah@kernel.org>
+M: Shuah Khan <skhan@linuxfoundation.org>
L: linux-kselftest@vger.kernel.org
T: git git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git
Q: https://patchwork.kernel.org/project/linux-kselftest/list/
F: drivers/net/netdevsim/*
NETXEN (1/10) GbE SUPPORT
-M: Manish Chopra <manish.chopra@cavium.com>
-M: Rahul Verma <rahul.verma@cavium.com>
-M: Dept-GELinuxNICDev@cavium.com
+M: Manish Chopra <manishc@marvell.com>
+M: Rahul Verma <rahulv@marvell.com>
+M: GR-Linux-NIC-Dev@marvell.com
L: netdev@vger.kernel.org
S: Supported
F: drivers/net/ethernet/qlogic/netxen/
F: drivers/scsi/qedi/
QLOGIC QL4xxx ETHERNET DRIVER
-M: Ariel Elior <Ariel.Elior@cavium.com>
-M: everest-linux-l2@cavium.com
+M: Ariel Elior <aelior@marvell.com>
+M: GR-everest-linux-l2@marvell.com
L: netdev@vger.kernel.org
S: Supported
F: drivers/net/ethernet/qlogic/qed/
F: drivers/net/ethernet/qlogic/qede/
QLOGIC QL4xxx RDMA DRIVER
-M: Michal Kalderon <Michal.Kalderon@cavium.com>
-M: Ariel Elior <Ariel.Elior@cavium.com>
+M: Michal Kalderon <mkalderon@marvell.com>
+M: Ariel Elior <aelior@marvell.com>
L: linux-rdma@vger.kernel.org
S: Supported
F: drivers/infiniband/hw/qedr/
F: drivers/scsi/qla2xxx/
QLOGIC QLA3XXX NETWORK DRIVER
-M: Dept-GELinuxNICDev@cavium.com
+M: GR-Linux-NIC-Dev@marvell.com
L: netdev@vger.kernel.org
S: Supported
F: Documentation/networking/device_drivers/qlogic/LICENSE.qla3xxx
F: drivers/scsi/qla4xxx/
QLOGIC QLCNIC (1/10)Gb ETHERNET DRIVER
-M: Shahed Shaikh <Shahed.Shaikh@cavium.com>
-M: Manish Chopra <manish.chopra@cavium.com>
-M: Dept-GELinuxNICDev@cavium.com
+M: Shahed Shaikh <shshaikh@marvell.com>
+M: Manish Chopra <manishc@marvell.com>
+M: GR-Linux-NIC-Dev@marvell.com
L: netdev@vger.kernel.org
S: Supported
F: drivers/net/ethernet/qlogic/qlcnic/
QLOGIC QLGE 10Gb ETHERNET DRIVER
-M: Manish Chopra <manish.chopra@cavium.com>
-M: Dept-GELinuxNICDev@cavium.com
+M: Manish Chopra <manishc@marvell.com>
+M: GR-Linux-NIC-Dev@marvell.com
L: netdev@vger.kernel.org
S: Supported
F: drivers/net/ethernet/qlogic/qlge/
USB OVER IP DRIVER
M: Valentina Manea <valentina.manea.m@gmail.com>
M: Shuah Khan <shuah@kernel.org>
+M: Shuah Khan <skhan@linuxfoundation.org>
L: linux-usb@vger.kernel.org
S: Maintained
F: Documentation/usb/usbip_protocol.txt
F: drivers/platform/x86/
F: drivers/platform/olpc/
+X86 PLATFORM DRIVERS - ARCH
+R: Darren Hart <dvhart@infradead.org>
+R: Andy Shevchenko <andy@infradead.org>
+L: platform-driver-x86@vger.kernel.org
+L: x86@kernel.org
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git x86/core
+S: Maintained
+F: arch/x86/platform
+
X86 VDSO
M: Andy Lutomirski <luto@kernel.org>
L: linux-kernel@vger.kernel.org
S: Maintained
F: drivers/media/tuners/tuner-xc2028.*
+XDP (eXpress Data Path)
+M: Alexei Starovoitov <ast@kernel.org>
+M: Daniel Borkmann <daniel@iogearbox.net>
+M: David S. Miller <davem@davemloft.net>
+M: Jakub Kicinski <jakub.kicinski@netronome.com>
+M: Jesper Dangaard Brouer <hawk@kernel.org>
+M: John Fastabend <john.fastabend@gmail.com>
+L: netdev@vger.kernel.org
+L: xdp-newbies@vger.kernel.org
+S: Supported
+F: net/core/xdp.c
+F: include/net/xdp.h
+F: kernel/bpf/devmap.c
+F: kernel/bpf/cpumap.c
+F: include/trace/events/xdp.h
+K: xdp
+N: xdp
+
XDP SOCKETS (AF_XDP)
M: Björn Töpel <bjorn.topel@intel.com>
M: Magnus Karlsson <magnus.karlsson@intel.com>
VERSION = 5
PATCHLEVEL = 0
SUBLEVEL = 0
-EXTRAVERSION = -rc2
+EXTRAVERSION = -rc5
NAME = Shy Crocodile
# *DOCUMENTATION*
endif
endif
+PHONY += prepare0
ifeq ($(KBUILD_EXTMOD),)
core-y += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/
# archprepare is used in arch Makefiles and when processed asm symlink,
# version.h and scripts_basic is processed / created.
-# Listed in dependency order
-PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
+PHONY += prepare archprepare prepare1 prepare2 prepare3
# prepare3 is used to check if we are building in a separate output directory,
# and if so do:
mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
mrproper-dirs := $(addprefix _mrproper_,scripts)
-PHONY += $(mrproper-dirs) mrproper archmrproper
+PHONY += $(mrproper-dirs) mrproper
$(mrproper-dirs):
$(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
-mrproper: clean archmrproper $(mrproper-dirs)
+mrproper: clean $(mrproper-dirs)
$(call cmd,rmdirs)
$(call cmd,rmfiles)
generic-y += compat.h
generic-y += device.h
generic-y += div64.h
-generic-y += dma-mapping.h
generic-y += emergency-restart.h
generic-y += extable.h
-generic-y += fb.h
generic-y += ftrace.h
generic-y += hardirq.h
generic-y += hw_irq.h
generic-y += irq_regs.h
generic-y += irq_work.h
-generic-y += kmap_types.h
generic-y += local.h
generic-y += local64.h
generic-y += mcs_spinlock.h
generic-y += mm-arch-hooks.h
generic-y += msi.h
generic-y += parport.h
-generic-y += pci.h
generic-y += percpu.h
generic-y += preempt.h
generic-y += topology.h
#endif
};
+struct bcr_actionpoint {
+#ifdef CONFIG_CPU_BIG_ENDIAN
+ unsigned int pad:21, min:1, num:2, ver:8;
+#else
+ unsigned int ver:8, num:2, min:1, pad:21;
+#endif
+};
+
#include <soc/arc/timers.h>
struct bcr_bpu_arcompact {
};
struct cpuinfo_arc_bpu {
- unsigned int ver, full, num_cache, num_pred;
+ unsigned int ver, full, num_cache, num_pred, ret_stk;
};
struct cpuinfo_arc_ccm {
struct {
unsigned int swap:1, norm:1, minmax:1, barrel:1, crc:1, swape:1, pad1:2,
fpu_sp:1, fpu_dp:1, dual:1, dual_enb:1, pad2:4,
- debug:1, ap:1, smart:1, rtt:1, pad3:4,
+ ap_num:4, ap_full:1, smart:1, rtt:1, pad3:1,
timer0:1, timer1:1, rtc:1, gfrc:1, pad4:4;
} extn;
struct bcr_mpy extn_mpy;
/*
* __ffs: Similar to ffs, but zero based (0-31)
*/
-static inline __attribute__ ((const)) int __ffs(unsigned long word)
+static inline __attribute__ ((const)) unsigned long __ffs(unsigned long word)
{
if (!word)
return word;
/*
* __ffs: Similar to ffs, but zero based (0-31)
*/
-static inline __attribute__ ((const)) int __ffs(unsigned long x)
+static inline __attribute__ ((const)) unsigned long __ffs(unsigned long x)
{
- int n;
+ unsigned long n;
asm volatile(
" ffs.f %0, %1 \n" /* 0:31; 31(Z) if src 0 */
/* counts condition */
[PERF_COUNT_HW_INSTRUCTIONS] = "iall",
- [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = "ijmp", /* Excludes ZOL jumps */
+ /* All jump instructions that are taken */
+ [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = "ijmptak",
[PERF_COUNT_ARC_BPOK] = "bpok", /* NP-NT, PT-T, PNT-NT */
#ifdef CONFIG_ISA_ARCV2
[PERF_COUNT_HW_BRANCH_MISSES] = "bpmp",
-/*
- * Linux performance counter support for ARC700 series
- *
- * Copyright (C) 2013-2015 Synopsys, Inc. (www.synopsys.com)
- *
- * This code is inspired by the perf support of various other architectures.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- */
+// SPDX-License-Identifier: GPL-2.0+
+//
+// Linux performance counter support for ARC CPUs.
+// This code is inspired by the perf support of various other architectures.
+//
+// Copyright (C) 2013-2018 Synopsys, Inc. (www.synopsys.com)
+
#include <linux/errno.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <asm/arcregs.h>
#include <asm/stacktrace.h>
+/* HW holds 8 symbols + one for null terminator */
+#define ARCPMU_EVENT_NAME_LEN 9
+
+enum arc_pmu_attr_groups {
+ ARCPMU_ATTR_GR_EVENTS,
+ ARCPMU_ATTR_GR_FORMATS,
+ ARCPMU_NR_ATTR_GR
+};
+
+struct arc_pmu_raw_event_entry {
+ char name[ARCPMU_EVENT_NAME_LEN];
+};
+
struct arc_pmu {
struct pmu pmu;
unsigned int irq;
int n_counters;
+ int n_events;
u64 max_period;
int ev_hw_idx[PERF_COUNT_ARC_HW_MAX];
+
+ struct arc_pmu_raw_event_entry *raw_entry;
+ struct attribute **attrs;
+ struct perf_pmu_events_attr *attr;
+ const struct attribute_group *attr_groups[ARCPMU_NR_ATTR_GR + 1];
};
struct arc_pmu_cpu {
{
struct arc_callchain_trace *ctrl = data;
struct perf_callchain_entry_ctx *entry = ctrl->perf_stuff;
+
perf_callchain_store(entry, addr);
if (ctrl->depth++ < 3)
return -1;
}
-void
-perf_callchain_kernel(struct perf_callchain_entry_ctx *entry, struct pt_regs *regs)
+void perf_callchain_kernel(struct perf_callchain_entry_ctx *entry,
+ struct pt_regs *regs)
{
struct arc_callchain_trace ctrl = {
.depth = 0,
arc_unwind_core(NULL, regs, callchain_trace, &ctrl);
}
-void
-perf_callchain_user(struct perf_callchain_entry_ctx *entry, struct pt_regs *regs)
+void perf_callchain_user(struct perf_callchain_entry_ctx *entry,
+ struct pt_regs *regs)
{
/*
* User stack can't be unwound trivially with kernel dwarf unwinder
static DEFINE_PER_CPU(struct arc_pmu_cpu, arc_pmu_cpu);
/* read counter #idx; note that counter# != event# on ARC! */
-static uint64_t arc_pmu_read_counter(int idx)
+static u64 arc_pmu_read_counter(int idx)
{
- uint32_t tmp;
- uint64_t result;
+ u32 tmp;
+ u64 result;
/*
* ARC supports making 'snapshots' of the counters, so we don't
write_aux_reg(ARC_REG_PCT_INDEX, idx);
tmp = read_aux_reg(ARC_REG_PCT_CONTROL);
write_aux_reg(ARC_REG_PCT_CONTROL, tmp | ARC_REG_PCT_CONTROL_SN);
- result = (uint64_t) (read_aux_reg(ARC_REG_PCT_SNAPH)) << 32;
+ result = (u64) (read_aux_reg(ARC_REG_PCT_SNAPH)) << 32;
result |= read_aux_reg(ARC_REG_PCT_SNAPL);
return result;
static void arc_perf_event_update(struct perf_event *event,
struct hw_perf_event *hwc, int idx)
{
- uint64_t prev_raw_count = local64_read(&hwc->prev_count);
- uint64_t new_raw_count = arc_pmu_read_counter(idx);
- int64_t delta = new_raw_count - prev_raw_count;
+ u64 prev_raw_count = local64_read(&hwc->prev_count);
+ u64 new_raw_count = arc_pmu_read_counter(idx);
+ s64 delta = new_raw_count - prev_raw_count;
/*
* We aren't afraid of hwc->prev_count changing beneath our feet
int ret;
if (!is_sampling_event(event)) {
- hwc->sample_period = arc_pmu->max_period;
+ hwc->sample_period = arc_pmu->max_period;
hwc->last_period = hwc->sample_period;
local64_set(&hwc->period_left, hwc->sample_period);
}
pr_debug("init cache event with h/w %08x \'%s\'\n",
(int)hwc->config, arc_pmu_ev_hw_map[ret]);
return 0;
+
+ case PERF_TYPE_RAW:
+ if (event->attr.config >= arc_pmu->n_events)
+ return -ENOENT;
+
+ hwc->config |= event->attr.config;
+ pr_debug("init raw event with idx %lld \'%s\'\n",
+ event->attr.config,
+ arc_pmu->raw_entry[event->attr.config].name);
+
+ return 0;
+
default:
return -ENOENT;
}
/* starts all counters */
static void arc_pmu_enable(struct pmu *pmu)
{
- uint32_t tmp;
+ u32 tmp;
tmp = read_aux_reg(ARC_REG_PCT_CONTROL);
write_aux_reg(ARC_REG_PCT_CONTROL, (tmp & 0xffff0000) | 0x1);
}
/* stops all counters */
static void arc_pmu_disable(struct pmu *pmu)
{
- uint32_t tmp;
+ u32 tmp;
tmp = read_aux_reg(ARC_REG_PCT_CONTROL);
write_aux_reg(ARC_REG_PCT_CONTROL, (tmp & 0xffff0000) | 0x0);
}
local64_set(&hwc->period_left, left);
hwc->last_period = period;
overflow = 1;
- } else if (unlikely(left <= 0)) {
+ } else if (unlikely(left <= 0)) {
/* left underflowed by less than period. */
left += period;
local64_set(&hwc->period_left, left);
write_aux_reg(ARC_REG_PCT_INDEX, idx);
/* Write value */
- write_aux_reg(ARC_REG_PCT_COUNTL, (u32)value);
- write_aux_reg(ARC_REG_PCT_COUNTH, (value >> 32));
+ write_aux_reg(ARC_REG_PCT_COUNTL, lower_32_bits(value));
+ write_aux_reg(ARC_REG_PCT_COUNTH, upper_32_bits(value));
perf_event_update_userpage(event);
/* Enable interrupt for this counter */
if (is_sampling_event(event))
write_aux_reg(ARC_REG_PCT_INT_CTRL,
- read_aux_reg(ARC_REG_PCT_INT_CTRL) | (1 << idx));
+ read_aux_reg(ARC_REG_PCT_INT_CTRL) | BIT(idx));
/* enable ARC pmu here */
write_aux_reg(ARC_REG_PCT_INDEX, idx); /* counter # */
* Reset interrupt flag by writing of 1. This is required
* to make sure pending interrupt was not left.
*/
- write_aux_reg(ARC_REG_PCT_INT_ACT, 1 << idx);
+ write_aux_reg(ARC_REG_PCT_INT_ACT, BIT(idx));
write_aux_reg(ARC_REG_PCT_INT_CTRL,
- read_aux_reg(ARC_REG_PCT_INT_CTRL) & ~(1 << idx));
+ read_aux_reg(ARC_REG_PCT_INT_CTRL) & ~BIT(idx));
}
if (!(event->hw.state & PERF_HES_STOPPED)) {
if (is_sampling_event(event)) {
/* Mimic full counter overflow as other arches do */
- write_aux_reg(ARC_REG_PCT_INT_CNTL, (u32)arc_pmu->max_period);
+ write_aux_reg(ARC_REG_PCT_INT_CNTL,
+ lower_32_bits(arc_pmu->max_period));
write_aux_reg(ARC_REG_PCT_INT_CNTH,
- (arc_pmu->max_period >> 32));
+ upper_32_bits(arc_pmu->max_period));
}
write_aux_reg(ARC_REG_PCT_CONFIG, 0);
idx = __ffs(active_ints);
/* Reset interrupt flag by writing of 1 */
- write_aux_reg(ARC_REG_PCT_INT_ACT, 1 << idx);
+ write_aux_reg(ARC_REG_PCT_INT_ACT, BIT(idx));
/*
* On reset of "interrupt active" bit corresponding
* Now we need to re-enable interrupt for the counter.
*/
write_aux_reg(ARC_REG_PCT_INT_CTRL,
- read_aux_reg(ARC_REG_PCT_INT_CTRL) | (1 << idx));
+ read_aux_reg(ARC_REG_PCT_INT_CTRL) | BIT(idx));
event = pmu_cpu->act_counter[idx];
hwc = &event->hw;
arc_pmu_stop(event, 0);
}
- active_ints &= ~(1U << idx);
+ active_ints &= ~BIT(idx);
} while (active_ints);
done:
write_aux_reg(ARC_REG_PCT_INT_ACT, 0xffffffff);
}
+/* Event field occupies the bottom 15 bits of our config field */
+PMU_FORMAT_ATTR(event, "config:0-14");
+static struct attribute *arc_pmu_format_attrs[] = {
+ &format_attr_event.attr,
+ NULL,
+};
+
+static struct attribute_group arc_pmu_format_attr_gr = {
+ .name = "format",
+ .attrs = arc_pmu_format_attrs,
+};
+
+static ssize_t arc_pmu_events_sysfs_show(struct device *dev,
+ struct device_attribute *attr,
+ char *page)
+{
+ struct perf_pmu_events_attr *pmu_attr;
+
+ pmu_attr = container_of(attr, struct perf_pmu_events_attr, attr);
+ return sprintf(page, "event=0x%04llx\n", pmu_attr->id);
+}
+
+/*
+ * We don't add attrs here as we don't have pre-defined list of perf events.
+ * We will generate and add attrs dynamically in probe() after we read HW
+ * configuration.
+ */
+static struct attribute_group arc_pmu_events_attr_gr = {
+ .name = "events",
+};
+
+static void arc_pmu_add_raw_event_attr(int j, char *str)
+{
+ memmove(arc_pmu->raw_entry[j].name, str, ARCPMU_EVENT_NAME_LEN - 1);
+ arc_pmu->attr[j].attr.attr.name = arc_pmu->raw_entry[j].name;
+ arc_pmu->attr[j].attr.attr.mode = VERIFY_OCTAL_PERMISSIONS(0444);
+ arc_pmu->attr[j].attr.show = arc_pmu_events_sysfs_show;
+ arc_pmu->attr[j].id = j;
+ arc_pmu->attrs[j] = &(arc_pmu->attr[j].attr.attr);
+}
+
+static int arc_pmu_raw_alloc(struct device *dev)
+{
+ arc_pmu->attr = devm_kmalloc_array(dev, arc_pmu->n_events + 1,
+ sizeof(*arc_pmu->attr), GFP_KERNEL | __GFP_ZERO);
+ if (!arc_pmu->attr)
+ return -ENOMEM;
+
+ arc_pmu->attrs = devm_kmalloc_array(dev, arc_pmu->n_events + 1,
+ sizeof(*arc_pmu->attrs), GFP_KERNEL | __GFP_ZERO);
+ if (!arc_pmu->attrs)
+ return -ENOMEM;
+
+ arc_pmu->raw_entry = devm_kmalloc_array(dev, arc_pmu->n_events,
+ sizeof(*arc_pmu->raw_entry), GFP_KERNEL | __GFP_ZERO);
+ if (!arc_pmu->raw_entry)
+ return -ENOMEM;
+
+ return 0;
+}
+
+static inline bool event_in_hw_event_map(int i, char *name)
+{
+ if (!arc_pmu_ev_hw_map[i])
+ return false;
+
+ if (!strlen(arc_pmu_ev_hw_map[i]))
+ return false;
+
+ if (strcmp(arc_pmu_ev_hw_map[i], name))
+ return false;
+
+ return true;
+}
+
+static void arc_pmu_map_hw_event(int j, char *str)
+{
+ int i;
+
+ /* See if HW condition has been mapped to a perf event_id */
+ for (i = 0; i < ARRAY_SIZE(arc_pmu_ev_hw_map); i++) {
+ if (event_in_hw_event_map(i, str)) {
+ pr_debug("mapping perf event %2d to h/w event \'%8s\' (idx %d)\n",
+ i, str, j);
+ arc_pmu->ev_hw_idx[i] = j;
+ }
+ }
+}
+
static int arc_pmu_device_probe(struct platform_device *pdev)
{
struct arc_reg_pct_build pct_bcr;
struct arc_reg_cc_build cc_bcr;
- int i, j, has_interrupts;
+ int i, has_interrupts;
int counter_size; /* in bits */
union cc_name {
struct {
- uint32_t word0, word1;
+ u32 word0, word1;
char sentinel;
} indiv;
- char str[9];
+ char str[ARCPMU_EVENT_NAME_LEN];
} cc_name;
return -ENODEV;
}
BUILD_BUG_ON(ARC_PERF_MAX_COUNTERS > 32);
- BUG_ON(pct_bcr.c > ARC_PERF_MAX_COUNTERS);
+ if (WARN_ON(pct_bcr.c > ARC_PERF_MAX_COUNTERS))
+ return -EINVAL;
READ_BCR(ARC_REG_CC_BUILD, cc_bcr);
- BUG_ON(!cc_bcr.v); /* Counters exist but No countable conditions ? */
+ if (WARN(!cc_bcr.v, "Counters exist but No countable conditions?"))
+ return -EINVAL;
arc_pmu = devm_kzalloc(&pdev->dev, sizeof(struct arc_pmu), GFP_KERNEL);
if (!arc_pmu)
return -ENOMEM;
+ arc_pmu->n_events = cc_bcr.c;
+
+ if (arc_pmu_raw_alloc(&pdev->dev))
+ return -ENOMEM;
+
has_interrupts = is_isa_arcv2() ? pct_bcr.i : 0;
arc_pmu->n_counters = pct_bcr.c;
pr_info("ARC perf\t: %d counters (%d bits), %d conditions%s\n",
arc_pmu->n_counters, counter_size, cc_bcr.c,
- has_interrupts ? ", [overflow IRQ support]":"");
+ has_interrupts ? ", [overflow IRQ support]" : "");
- cc_name.str[8] = 0;
+ cc_name.str[ARCPMU_EVENT_NAME_LEN - 1] = 0;
for (i = 0; i < PERF_COUNT_ARC_HW_MAX; i++)
arc_pmu->ev_hw_idx[i] = -1;
/* loop thru all available h/w condition indexes */
- for (j = 0; j < cc_bcr.c; j++) {
- write_aux_reg(ARC_REG_CC_INDEX, j);
+ for (i = 0; i < cc_bcr.c; i++) {
+ write_aux_reg(ARC_REG_CC_INDEX, i);
cc_name.indiv.word0 = read_aux_reg(ARC_REG_CC_NAME0);
cc_name.indiv.word1 = read_aux_reg(ARC_REG_CC_NAME1);
- /* See if it has been mapped to a perf event_id */
- for (i = 0; i < ARRAY_SIZE(arc_pmu_ev_hw_map); i++) {
- if (arc_pmu_ev_hw_map[i] &&
- !strcmp(arc_pmu_ev_hw_map[i], cc_name.str) &&
- strlen(arc_pmu_ev_hw_map[i])) {
- pr_debug("mapping perf event %2d to h/w event \'%8s\' (idx %d)\n",
- i, cc_name.str, j);
- arc_pmu->ev_hw_idx[i] = j;
- }
- }
+ arc_pmu_map_hw_event(i, cc_name.str);
+ arc_pmu_add_raw_event_attr(i, cc_name.str);
}
+ arc_pmu_events_attr_gr.attrs = arc_pmu->attrs;
+ arc_pmu->attr_groups[ARCPMU_ATTR_GR_EVENTS] = &arc_pmu_events_attr_gr;
+ arc_pmu->attr_groups[ARCPMU_ATTR_GR_FORMATS] = &arc_pmu_format_attr_gr;
+
arc_pmu->pmu = (struct pmu) {
.pmu_enable = arc_pmu_enable,
.pmu_disable = arc_pmu_disable,
.start = arc_pmu_start,
.stop = arc_pmu_stop,
.read = arc_pmu_read,
+ .attr_groups = arc_pmu->attr_groups,
};
if (has_interrupts) {
} else
arc_pmu->pmu.capabilities |= PERF_PMU_CAP_NO_INTERRUPT;
- return perf_pmu_register(&arc_pmu->pmu, pdev->name, PERF_TYPE_RAW);
+ /*
+ * perf parser doesn't really like '-' symbol in events name, so let's
+ * use '_' in arc pct name as it goes to kernel PMU event prefix.
+ */
+ return perf_pmu_register(&arc_pmu->pmu, "arc_pct", PERF_TYPE_RAW);
}
-#ifdef CONFIG_OF
static const struct of_device_id arc_pmu_match[] = {
{ .compatible = "snps,arc700-pct" },
{ .compatible = "snps,archs-pct" },
{},
};
MODULE_DEVICE_TABLE(of, arc_pmu_match);
-#endif
static struct platform_driver arc_pmu_driver = {
.driver = {
struct cpuinfo_arc *cpu = &cpuinfo_arc700[smp_processor_id()];
const struct id_to_str *tbl;
struct bcr_isa_arcv2 isa;
+ struct bcr_actionpoint ap;
FIX_PTR(cpu);
cpu->bpu.full = bpu.ft;
cpu->bpu.num_cache = 256 << bpu.bce;
cpu->bpu.num_pred = 2048 << bpu.pte;
+ cpu->bpu.ret_stk = 4 << bpu.rse;
if (cpu->core.family >= 0x54) {
unsigned int exec_ctrl;
}
}
- READ_BCR(ARC_REG_AP_BCR, bcr);
- cpu->extn.ap = bcr.ver ? 1 : 0;
+ READ_BCR(ARC_REG_AP_BCR, ap);
+ if (ap.ver) {
+ cpu->extn.ap_num = 2 << ap.num;
+ cpu->extn.ap_full = !!ap.min;
+ }
READ_BCR(ARC_REG_SMART_BCR, bcr);
cpu->extn.smart = bcr.ver ? 1 : 0;
READ_BCR(ARC_REG_RTT_BCR, bcr);
cpu->extn.rtt = bcr.ver ? 1 : 0;
- cpu->extn.debug = cpu->extn.ap | cpu->extn.smart | cpu->extn.rtt;
-
READ_BCR(ARC_REG_ISA_CFG_BCR, isa);
/* some hacks for lack of feature BCR info in old ARC700 cores */
if (cpu->bpu.ver)
n += scnprintf(buf + n, len - n,
- "BPU\t\t: %s%s match, cache:%d, Predict Table:%d",
+ "BPU\t\t: %s%s match, cache:%d, Predict Table:%d Return stk: %d",
IS_AVAIL1(cpu->bpu.full, "full"),
IS_AVAIL1(!cpu->bpu.full, "partial"),
- cpu->bpu.num_cache, cpu->bpu.num_pred);
+ cpu->bpu.num_cache, cpu->bpu.num_pred, cpu->bpu.ret_stk);
if (is_isa_arcv2()) {
struct bcr_lpb lpb;
IS_AVAIL1(cpu->extn.fpu_sp, "SP "),
IS_AVAIL1(cpu->extn.fpu_dp, "DP "));
- if (cpu->extn.debug)
- n += scnprintf(buf + n, len - n, "DEBUG\t\t: %s%s%s\n",
- IS_AVAIL1(cpu->extn.ap, "ActionPoint "),
+ if (cpu->extn.ap_num | cpu->extn.smart | cpu->extn.rtt) {
+ n += scnprintf(buf + n, len - n, "DEBUG\t\t: %s%s",
IS_AVAIL1(cpu->extn.smart, "smaRT "),
IS_AVAIL1(cpu->extn.rtt, "RTT "));
+ if (cpu->extn.ap_num) {
+ n += scnprintf(buf + n, len - n, "ActionPoint %d/%s",
+ cpu->extn.ap_num,
+ cpu->extn.ap_full ? "full":"min");
+ }
+ n += scnprintf(buf + n, len - n, "\n");
+ }
if (cpu->dccm.sz || cpu->iccm.sz)
n += scnprintf(buf + n, len - n, "Extn [CCM]\t: DCCM @ %x, %d KB / ICCM: @ %x, %d KB\n",
#include <asm/arcregs.h>
#include <asm/irqflags.h>
+#define ARC_PATH_MAX 256
+
/*
* Common routine to print scratch regs (r0-r12) or callee regs (r13-r25)
* -Prints 3 regs per line and a CR.
print_reg_file(&(cregs->r13), 13);
}
-static void print_task_path_n_nm(struct task_struct *tsk, char *buf)
+static void print_task_path_n_nm(struct task_struct *tsk)
{
char *path_nm = NULL;
struct mm_struct *mm;
struct file *exe_file;
+ char buf[ARC_PATH_MAX];
mm = get_task_mm(tsk);
if (!mm)
mmput(mm);
if (exe_file) {
- path_nm = file_path(exe_file, buf, 255);
+ path_nm = file_path(exe_file, buf, ARC_PATH_MAX-1);
fput(exe_file);
}
pr_info("Path: %s\n", !IS_ERR(path_nm) ? path_nm : "?");
}
-static void show_faulting_vma(unsigned long address, char *buf)
+static void show_faulting_vma(unsigned long address)
{
struct vm_area_struct *vma;
- char *nm = buf;
struct mm_struct *active_mm = current->active_mm;
/* can't use print_vma_addr() yet as it doesn't check for
* if the container VMA is not found
*/
if (vma && (vma->vm_start <= address)) {
+ char buf[ARC_PATH_MAX];
+ char *nm = "?";
+
if (vma->vm_file) {
- nm = file_path(vma->vm_file, buf, PAGE_SIZE - 1);
+ nm = file_path(vma->vm_file, buf, ARC_PATH_MAX-1);
if (IS_ERR(nm))
nm = "?";
}
{
struct task_struct *tsk = current;
struct callee_regs *cregs;
- char *buf;
- buf = (char *)__get_free_page(GFP_KERNEL);
- if (!buf)
- return;
+ /*
+ * generic code calls us with preemption disabled, but some calls
+ * here could sleep, so re-enable to avoid lockdep splat
+ */
+ preempt_enable();
- print_task_path_n_nm(tsk, buf);
+ print_task_path_n_nm(tsk);
show_regs_print_info(KERN_INFO);
show_ecr_verbose(regs);
(void *)regs->blink, (void *)regs->ret);
if (user_mode(regs))
- show_faulting_vma(regs->ret, buf); /* faulting code, not data */
+ show_faulting_vma(regs->ret); /* faulting code, not data */
pr_info("[STAT32]: 0x%08lx", regs->status32);
if (cregs)
show_callee_regs(cregs);
- free_page((unsigned long)buf);
+ preempt_disable();
}
void show_kernel_fault_diag(const char *str, struct pt_regs *regs,
*/
#include <linux/linkage.h>
+#include <asm/cache.h>
-#undef PREALLOC_NOT_AVAIL
+/*
+ * The memset implementation below is optimized to use prefetchw and prealloc
+ * instruction in&nbs
git.samba.org / sfrench / cifs-2.6.git / commitdiff