IF YOU WOULD LIKE TO GET AN ACCOUNT, please write an
email to Administrator. User accounts are meant only to access repo
and report issues and/or generate pull requests.
This is a purpose-specific Git hosting for
BaseALT
projects. Thank you for your understanding!
Только зарегистрированные пользователи имеют доступ к сервису!
Для получения аккаунта, обратитесь к администратору.
In commit 70e806e4e645 ("mm: Do early cow for pinned pages during fork()
for ptes") we write-protected the PTE before doing the page pinning
check, in order to avoid a race with concurrent fast-GUP pinning (which
doesn't take the mm semaphore or the page table lock).
That trick doesn't actually work - it doesn't handle memory ordering
properly, and doing so would be prohibitively expensive.
It also isn't really needed. While we're moving in the direction of
allowing and supporting page pinning without marking the pinned area
with MADV_DONTFORK, the fact is that we've never really supported this
kind of odd "concurrent fork() and page pinning", and doing the
serialization on a pte level is just wrong.
We can add serialization with a per-mm sequence counter, so we know how
to solve that race properly, but we'll do that at a more appropriate
time. Right now this just removes the write protect games.
It also turns out that the write protect games actually break on Power,
as reported by Aneesh Kumar:
"Architecture like ppc64 expects set_pte_at to be not used for updating
a valid pte. This is further explained in commit 56eecdb912b5 ("mm:
Use ptep/pmdp_set_numa() for updating _PAGE_NUMA bit")"
and the code triggered a warning there:
WARNING: CPU: 0 PID: 30613 at arch/powerpc/mm/pgtable.c:185 set_pte_at+0x2a8/0x3a0 arch/powerpc/mm/pgtable.c:185
Call Trace:
copy_present_page mm/memory.c:857 [inline]
copy_present_pte mm/memory.c:899 [inline]
copy_pte_range mm/memory.c:1014 [inline]
copy_pmd_range mm/memory.c:1092 [inline]
copy_pud_range mm/memory.c:1127 [inline]
copy_p4d_range mm/memory.c:1150 [inline]
copy_page_range+0x1f6c/0x2cc0 mm/memory.c:1212
dup_mmap kernel/fork.c:592 [inline]
dup_mm+0x77c/0xab0 kernel/fork.c:1355
copy_mm kernel/fork.c:1411 [inline]
copy_process+0x1f00/0x2740 kernel/fork.c:2070
_do_fork+0xc4/0x10b0 kernel/fork.c:2429
Link: https://lore.kernel.org/lkml/CAHk-=wiWr+gO0Ro4LvnJBMs90OiePNyrE3E+pJvc9PzdBShdmw@mail.gmail.com/
Link: https://lore.kernel.org/linuxppc-dev/20201008092541.398079-1-aneesh.kumar@linux.ibm.com/
Reported-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Tested-by: Leon Romanovsky <leonro@nvidia.com>
Cc: Peter Xu <peterx@redhat.com>
Cc: Jason Gunthorpe <jgg@ziepe.ca>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Jan Kara <jack@suse.cz>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Kirill Shutemov <kirill@shutemov.name>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
ADD_STA_CMD_API_S ver 12 was added in order to properly support
auxiliary activities in CDB NICs. In the new version we don't need
to allocate an aux station at initialization, instead we add an
aux station only when an auxiliary activity that requires a dedicated Tx
queue is needed. For now the only case we need this kind of activity is
when using hot spot 2.0
Signed-off-by: Nathan Errera <nathan.errera@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/iwlwifi.20201008180656.700e6e2e3077.Icdd807b6a3ad3fed806449ea0a13f856aa20e632@changeid
As part of changes made to properly support auxiliary activities in CDB
NICs, an aux sta will be added when using hot spot 2.0 and will need
to be removed when roc flow is done.
In order to do so, prepare the roc_done_wk to work synchronously as the
rm_aux_sta is a SYNC command.
Since now all of th iwl_mvm_flush_sta function are using it sync,
removed the flag argument from the function.
Signed-off-by: Nathan Errera <nathan.errera@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/iwlwifi.20201008180656.71b441c8b682.Ia1d216cb680308b91d6da9f73e23ae9f4baac79f@changeid
The FW relies on the re-enablement of the TX in order to know
it can exit quiet mode. Currently in case of CSA with quiet mode,
the quiet mode is never cancelled, resulting in a complete traffic
hang.
Signed-off-by: Sara Sharon <sara.sharon@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/iwlwifi.20201008180656.fee389c83ded.I09550fdadb61f899242d7e7b7578672372e2b7fe@changeid
If we have only a single RX queue, such as when MSI-X is not
available, we should not send the RFH_QUEUEU_CONFIG_CMD, because our
only queue is the same as the command queue and will be configured as
part of the context info. Our code was actually trying to send the
command with 0 queues, which caused UMAC assert 0x1D04.
Fix that by not sending the command when we have a single queue.
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/iwlwifi.20201008180656.c35eeb3299f8.I08f79a6ebe150a7d180b7005b24504bfdba6d8b5@changeid
The legacy_httxpowerdiff in rtl8192se is pretty much the same as
the legacy_ht_txpowerdiff for other chips. Use the same name to
keep the consistency.
Signed-off-by: Chris Chiu <chiu@endlessos.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20201006035928.5566-1-chiu@endlessm.com
clang static analysis reports this problem:
sdio.c:2403:3: warning: Attempt to free released memory
kfree(card->mpa_rx.buf);
^~~~~~~~~~~~~~~~~~~~~~~
When mwifiex_init_sdio() fails in its first call to
mwifiex_alloc_sdio_mpa_buffer, it falls back to calling it
again. If the second alloc of mpa_tx.buf fails, the error
handler will try to free the old, previously freed mpa_rx.buf.
Reviewing the code, it looks like a second double free would
happen with mwifiex_cleanup_sdio().
So set both pointers to NULL when they are freed.
Fixes: 5e6e3a92b9a4 ("wireless: mwifiex: initial commit for Marvell mwifiex driver")
Signed-off-by: Tom Rix <trix@redhat.com>
Reviewed-by: Brian Norris <briannorris@chromium.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20201004131931.29782-1-trix@redhat.com
In ath11k_mac_setup_iface_combinations(), if memory cannot be assigned
for the variable limits, then the memory assigned to combinations will
be leaked. Fix this.
Addresses-Coverity-ID: 1497534 ("Resource leaks")
Fixes: 2626c269702e ("ath11k: add interface_modes to hw_params")
Signed-off-by: Alex Dewar <alex.dewar90@gmail.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20201004100218.311653-2-alex.dewar90@gmail.com
Also demote a non-conforming kernel-doc function header.
Fixes the following W=1 kernel build warning(s):
drivers/net/wireless/intel/iwlwifi/iwl-drv.c:124: warning: Function parameter or member 'dbgfs_drv' not described in 'iwl_drv'
drivers/net/wireless/intel/iwlwifi/iwl-drv.c:124: warning: Function parameter or member 'dbgfs_trans' not described in 'iwl_drv'
drivers/net/wireless/intel/iwlwifi/iwl-drv.c:124: warning: Function parameter or member 'dbgfs_op_mode' not described in 'iwl_drv'
drivers/net/wireless/intel/iwlwifi/iwl-drv.c:1329: warning: Function parameter or member 'ucode_raw' not described in 'iwl_req_fw_callback'
drivers/net/wireless/intel/iwlwifi/iwl-drv.c:1329: warning: Function parameter or member 'context' not described in 'iwl_req_fw_callback'
Cc: Johannes Berg <johannes.berg@intel.com>
Cc: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Cc: Luca Coelho <luciano.coelho@intel.com>
Cc: Intel Linux Wireless <linuxwifi@intel.com>
Cc: Kalle Valo <kvalo@codeaurora.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: linux-wireless@vger.kernel.org
Cc: netdev@vger.kernel.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20200910065431.657636-16-lee.jones@linaro.org
Kerneldoc expects attributes/parameters to be in '@*.: ' format and
gets confused if the variable does not follow the type/attribute
definitions.
Fixes the following W=1 kernel build warning(s):
drivers/net/wireless/intel/iwlwifi/dvm/devices.c:66: warning: Function parameter or member 'priv' not described in 'iwl_beacon_time_mask_low'
drivers/net/wireless/intel/iwlwifi/dvm/devices.c:66: warning: Function parameter or member 'tsf_bits' not described in 'iwl_beacon_time_mask_low'
drivers/net/wireless/intel/iwlwifi/dvm/devices.c:77: warning: Function parameter or member 'priv' not described in 'iwl_beacon_time_mask_high'
drivers/net/wireless/intel/iwlwifi/dvm/devices.c:77: warning: Function parameter or member 'tsf_bits' not described in 'iwl_beacon_time_mask_high'
Cc: Johannes Berg <johannes.berg@intel.com>
Cc: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Cc: Luca Coelho <luciano.coelho@intel.com>
Cc: Intel Linux Wireless <linuxwifi@intel.com>
Cc: Kalle Valo <kvalo@codeaurora.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: linux-wireless@vger.kernel.org
Cc: netdev@vger.kernel.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20200910065431.657636-15-lee.jones@linaro.org
Fixes the following W=1 kernel build warning(s):
drivers/net/wireless/intel/iwlwifi/mvm/tx.c:1379: warning: Function parameter or member 'rate_n_flags' not described in 'iwl_mvm_hwrate_to_tx_status'
drivers/net/wireless/intel/iwlwifi/mvm/tx.c:1379: warning: Function parameter or member 'info' not described in 'iwl_mvm_hwrate_to_tx_status'
drivers/net/wireless/intel/iwlwifi/mvm/tx.c:1431: warning: Function parameter or member 'mvm' not described in 'iwl_mvm_get_scd_ssn'
Cc: Johannes Berg <johannes.berg@intel.com>
Cc: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Cc: Luca Coelho <luciano.coelho@intel.com>
Cc: Intel Linux Wireless <linuxwifi@intel.com>
Cc: Kalle Valo <kvalo@codeaurora.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: linux-wireless@vger.kernel.org
Cc: netdev@vger.kernel.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20200910065431.657636-14-lee.jones@linaro.org
Fixes the following W=1 kernel build warning(s):
drivers/net/wireless/intel/iwlwifi/dvm/rxon.c:695: warning: bad line:
drivers/net/wireless/intel/iwlwifi/dvm/rxon.c:701: warning: Function parameter or member 'priv' not described in 'iwl_set_rxon_channel'
drivers/net/wireless/intel/iwlwifi/dvm/rxon.c:701: warning: Function parameter or member 'ctx' not described in 'iwl_set_rxon_channel'
drivers/net/wireless/intel/iwlwifi/dvm/rxon.c:839: warning: Function parameter or member 'ctx' not described in 'iwl_full_rxon_required'
drivers/net/wireless/intel/iwlwifi/dvm/rxon.c:1029: warning: Function parameter or member 'priv' not described in 'iwlagn_commit_rxon'
drivers/net/wireless/intel/iwlwifi/dvm/rxon.c:1029: warning: Function parameter or member 'ctx' not described in 'iwlagn_commit_rxon'
Cc: Johannes Berg <johannes.berg@intel.com>
Cc: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Cc: Luca Coelho <luciano.coelho@intel.com>
Cc: Intel Linux Wireless <linuxwifi@intel.com>
Cc: Kalle Valo <kvalo@codeaurora.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: linux-wireless@vger.kernel.org
Cc: netdev@vger.kernel.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20200910065431.657636-13-lee.jones@linaro.org
2 of which do not attempt to document their parameters, 1 does a poor job.
Fixes the following W=1 kernel build warning(s):
drivers/net/wireless/intel/iwlwifi/dvm/scan.c:193: warning: Function parameter or member 'priv' not described in 'iwl_scan_cancel'
drivers/net/wireless/intel/iwlwifi/dvm/scan.c:205: warning: Function parameter or member 'priv' not described in 'iwl_scan_cancel_timeout'
drivers/net/wireless/intel/iwlwifi/dvm/scan.c:570: warning: Function parameter or member 'frame' not described in 'iwl_fill_probe_req'
drivers/net/wireless/intel/iwlwifi/dvm/scan.c:570: warning: Function parameter or member 'ta' not described in 'iwl_fill_probe_req'
drivers/net/wireless/intel/iwlwifi/dvm/scan.c:570: warning: Function parameter or member 'ies' not described in 'iwl_fill_probe_req'
drivers/net/wireless/intel/iwlwifi/dvm/scan.c:570: warning: Function parameter or member 'ie_len' not described in 'iwl_fill_probe_req'
drivers/net/wireless/intel/iwlwifi/dvm/scan.c:570: warning: Function parameter or member 'ssid' not described in 'iwl_fill_probe_req'
drivers/net/wireless/intel/iwlwifi/dvm/scan.c:570: warning: Function parameter or member 'ssid_len' not described in 'iwl_fill_probe_req'
drivers/net/wireless/intel/iwlwifi/dvm/scan.c:570: warning: Function parameter or member 'left' not described in 'iwl_fill_probe_req'
Cc: Johannes Berg <johannes.berg@intel.com>
Cc: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Cc: Luca Coelho <luciano.coelho@intel.com>
Cc: Intel Linux Wireless <linuxwifi@intel.com>
Cc: Kalle Valo <kvalo@codeaurora.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: linux-wireless@vger.kernel.org
Cc: netdev@vger.kernel.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20200910065431.657636-12-lee.jones@linaro.org
Fix misnamed, and missing descriptions likely due to doc-rot.
Fixes the following W=1 kernel build warning(s):
drivers/net/wireless/intel/iwlwifi/mvm/utils.c:669: warning: Function parameter or member 'mvm' not described in 'iwl_mvm_send_lq_cmd'
drivers/net/wireless/intel/iwlwifi/mvm/utils.c:669: warning: Function parameter or member 'lq' not described in 'iwl_mvm_send_lq_cmd'
drivers/net/wireless/intel/iwlwifi/mvm/utils.c:669: warning: Excess function parameter 'sync' description in 'iwl_mvm_send_lq_cmd'
drivers/net/wireless/intel/iwlwifi/mvm/utils.c:695: warning: Function parameter or member 'mvm' not described in 'iwl_mvm_update_smps'
drivers/net/wireless/intel/iwlwifi/mvm/utils.c:695: warning: Function parameter or member 'vif' not described in 'iwl_mvm_update_smps'
drivers/net/wireless/intel/iwlwifi/mvm/utils.c:695: warning: Function parameter or member 'smps_request' not described in 'iwl_mvm_update_smps'
drivers/net/wireless/intel/iwlwifi/mvm/utils.c:695: warning: Excess function parameter 'smps_requests' description in 'iwl_mvm_update_smps'
Cc: Johannes Berg <johannes.berg@intel.com>
Cc: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Cc: Luca Coelho <luciano.coelho@intel.com>
Cc: Intel Linux Wireless <linuxwifi@intel.com>
Cc: Kalle Valo <kvalo@codeaurora.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: linux-wireless@vger.kernel.org
Cc: netdev@vger.kernel.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20200910065431.657636-11-lee.jones@linaro.org
Fixes the following W=1 kernel build warning(s):
drivers/net/wireless/intel/iwlwifi/dvm/rx.c:145: warning: Function parameter or member 'priv' not described in 'iwlagn_good_plcp_health'
drivers/net/wireless/intel/iwlwifi/dvm/rx.c:145: warning: Function parameter or member 'cur_ofdm' not described in 'iwlagn_good_plcp_health'
drivers/net/wireless/intel/iwlwifi/dvm/rx.c:145: warning: Function parameter or member 'cur_ofdm_ht' not described in 'iwlagn_good_plcp_health'
drivers/net/wireless/intel/iwlwifi/dvm/rx.c:145: warning: Function parameter or member 'msecs' not described in 'iwlagn_good_plcp_health'
drivers/net/wireless/intel/iwlwifi/dvm/rx.c:939: warning: Function parameter or member 'priv' not described in 'iwl_setup_rx_handlers'
Cc: Johannes Berg <johannes.berg@intel.com>
Cc: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Cc: Luca Coelho <luciano.coelho@intel.com>
Cc: Intel Linux Wireless <linuxwifi@intel.com>
Cc: Kalle Valo <kvalo@codeaurora.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: linux-wireless@vger.kernel.org
Cc: netdev@vger.kernel.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20200910065431.657636-10-lee.jones@linaro.org
Looks as if it's never been used.
Fixes the following W=1 kernel build warning(s):
drivers/net/wireless/intel/iwlwifi/mvm/ops.c:466:36: warning: ‘iwl_mvm_debug_names’ defined but not used [-Wunused-const-variable=]
Cc: Johannes Berg <johannes.berg@intel.com>
Cc: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Cc: Luca Coelho <luciano.coelho@intel.com>
Cc: Intel Linux Wireless <linuxwifi@intel.com>
Cc: Kalle Valo <kvalo@codeaurora.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: linux-wireless@vger.kernel.org
Cc: netdev@vger.kernel.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20200910065431.657636-9-lee.jones@linaro.org
Fixes the following W=1 kernel build warning(s):
drivers/net/wireless/intel/iwlwifi/dvm/sta.c:244: warning: Function parameter or member 'priv' not described in 'iwl_prep_station'
drivers/net/wireless/intel/iwlwifi/dvm/sta.c:244: warning: Function parameter or member 'ctx' not described in 'iwl_prep_station'
drivers/net/wireless/intel/iwlwifi/dvm/sta.c:244: warning: Function parameter or member 'addr' not described in 'iwl_prep_station'
drivers/net/wireless/intel/iwlwifi/dvm/sta.c:244: warning: Function parameter or member 'is_ap' not described in 'iwl_prep_station'
drivers/net/wireless/intel/iwlwifi/dvm/sta.c:244: warning: Function parameter or member 'sta' not described in 'iwl_prep_station'
drivers/net/wireless/intel/iwlwifi/dvm/sta.c:332: warning: Function parameter or member 'priv' not described in 'iwl_add_station_common'
drivers/net/wireless/intel/iwlwifi/dvm/sta.c:332: warning: Function parameter or member 'ctx' not described in 'iwl_add_station_common'
drivers/net/wireless/intel/iwlwifi/dvm/sta.c:332: warning: Function parameter or member 'addr' not described in 'iwl_add_station_common'
drivers/net/wireless/intel/iwlwifi/dvm/sta.c:332: warning: Function parameter or member 'is_ap' not described in 'iwl_add_station_common'
drivers/net/wireless/intel/iwlwifi/dvm/sta.c:332: warning: Function parameter or member 'sta' not described in 'iwl_add_station_common'
drivers/net/wireless/intel/iwlwifi/dvm/sta.c:332: warning: Function parameter or member 'sta_id_r' not described in 'iwl_add_station_common'
drivers/net/wireless/intel/iwlwifi/dvm/sta.c:390: warning: Function parameter or member 'priv' not described in 'iwl_sta_ucode_deactivate'
drivers/net/wireless/intel/iwlwifi/dvm/sta.c:390: warning: Function parameter or member 'sta_id' not described in 'iwl_sta_ucode_deactivate'
drivers/net/wireless/intel/iwlwifi/dvm/sta.c:459: warning: Function parameter or member 'priv' not described in 'iwl_remove_station'
drivers/net/wireless/intel/iwlwifi/dvm/sta.c:459: warning: Function parameter or member 'sta_id' not described in 'iwl_remove_station'
drivers/net/wireless/intel/iwlwifi/dvm/sta.c:459: warning: Function parameter or member 'addr' not described in 'iwl_remove_station'
drivers/net/wireless/intel/iwlwifi/dvm/sta.c:614: warning: Function parameter or member 'priv' not described in 'iwl_clear_ucode_stations'
drivers/net/wireless/intel/iwlwifi/dvm/sta.c:614: warning: Function parameter or member 'ctx' not described in 'iwl_clear_ucode_stations'
drivers/net/wireless/intel/iwlwifi/dvm/sta.c:648: warning: Function parameter or member 'priv' not described in 'iwl_restore_stations'
drivers/net/wireless/intel/iwlwifi/dvm/sta.c:648: warning: Function parameter or member 'ctx' not described in 'iwl_restore_stations'
drivers/net/wireless/intel/iwlwifi/dvm/sta.c:790: warning: Function parameter or member 'priv' not described in 'is_lq_table_valid'
drivers/net/wireless/intel/iwlwifi/dvm/sta.c:790: warning: Function parameter or member 'ctx' not described in 'is_lq_table_valid'
drivers/net/wireless/intel/iwlwifi/dvm/sta.c:790: warning: Function parameter or member 'lq' not described in 'is_lq_table_valid'
drivers/net/wireless/intel/iwlwifi/dvm/sta.c:822: warning: Function parameter or member 'priv' not described in 'iwl_send_lq_cmd'
drivers/net/wireless/intel/iwlwifi/dvm/sta.c:822: warning: Function parameter or member 'ctx' not described in 'iwl_send_lq_cmd'
drivers/net/wireless/intel/iwlwifi/dvm/sta.c:822: warning: Function parameter or member 'lq' not described in 'iwl_send_lq_cmd'
drivers/net/wireless/intel/iwlwifi/dvm/sta.c:822: warning: Function parameter or member 'flags' not described in 'iwl_send_lq_cmd'
drivers/net/wireless/intel/iwlwifi/dvm/sta.c:1270: warning: Function parameter or member 'priv' not described in 'iwlagn_alloc_bcast_station'
drivers/net/wireless/intel/iwlwifi/dvm/sta.c:1270: warning: Function parameter or member 'ctx' not described in 'iwlagn_alloc_bcast_station'
drivers/net/wireless/intel/iwlwifi/dvm/sta.c:1309: warning: Function parameter or member 'priv' not described in 'iwl_update_bcast_station'
drivers/net/wireless/intel/iwlwifi/dvm/sta.c:1309: warning: Function parameter or member 'ctx' not described in 'iwl_update_bcast_station'
drivers/net/wireless/intel/iwlwifi/dvm/sta.c:1348: warning: Function parameter or member 'priv' not described in 'iwl_sta_tx_modify_enable_tid'
drivers/net/wireless/intel/iwlwifi/dvm/sta.c:1348: warning: Function parameter or member 'sta_id' not described in 'iwl_sta_tx_modify_enable_tid'
drivers/net/wireless/intel/iwlwifi/dvm/sta.c:1348: warning: Function parameter or member 'tid' not described in 'iwl_sta_tx_modify_enable_tid'
Cc: Johannes Berg <johannes.berg@intel.com>
Cc: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Cc: Luca Coelho <luciano.coelho@intel.com>
Cc: Intel Linux Wireless <linuxwifi@intel.com>
Cc: Kalle Valo <kvalo@codeaurora.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: linux-wireless@vger.kernel.org
Cc: netdev@vger.kernel.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20200910065431.657636-8-lee.jones@linaro.org
This is the only use of kerneldoc in the sourcefile and no
descriptions are provided.
Fixes the following W=1 kernel build warning(s):
drivers/net/wireless/intel/iwlwifi/dvm/calib.c:770: warning: Function parameter or member 'priv' not described in 'iwl_find_disconn_antenna'
drivers/net/wireless/intel/iwlwifi/dvm/calib.c:770: warning: Function parameter or member 'average_sig' not described in 'iwl_find_disconn_antenna'
drivers/net/wireless/intel/iwlwifi/dvm/calib.c:770: warning: Function parameter or member 'data' not described in 'iwl_find_disconn_antenna'
Cc: Johannes Berg <johannes.berg@intel.com>
Cc: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Cc: Luca Coelho <luciano.coelho@intel.com>
Cc: Intel Linux Wireless <linuxwifi@intel.com>
Cc: Kalle Valo <kvalo@codeaurora.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: linux-wireless@vger.kernel.org
Cc: netdev@vger.kernel.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20200910065431.657636-6-lee.jones@linaro.org
Neither of these headers attempt to document any function parameters.
Fixes the following W=1 kernel build warning(s):
drivers/net/wireless/intel/iwlwifi/dvm/lib.c:121: warning: Function parameter or member 'priv' not described in 'iwlagn_txfifo_flush'
drivers/net/wireless/intel/iwlwifi/dvm/lib.c:121: warning: Function parameter or member 'scd_q_msk' not described in 'iwlagn_txfifo_flush'
drivers/net/wireless/intel/iwlwifi/dvm/lib.c:779: warning: Function parameter or member 'priv' not described in 'iwlagn_set_rxon_chain'
drivers/net/wireless/intel/iwlwifi/dvm/lib.c:779: warning: Function parameter or member 'ctx' not described in 'iwlagn_set_rxon_chain'
Cc: Johannes Berg <johannes.berg@intel.com>
Cc: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Cc: Luca Coelho <luciano.coelho@intel.com>
Cc: Intel Linux Wireless <linuxwifi@intel.com>
Cc: Kalle Valo <kvalo@codeaurora.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: linux-wireless@vger.kernel.org
Cc: netdev@vger.kernel.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20200910065431.657636-5-lee.jones@linaro.org
None of these headers attempt to document any function parameters.
Fixes the following W=1 kernel build warning(s):
drivers/net/wireless/intel/iwlwifi/dvm/tx.c:811: warning: Function parameter or member 'priv' not described in 'iwlagn_hwrate_to_tx_control'
drivers/net/wireless/intel/iwlwifi/dvm/tx.c:811: warning: Function parameter or member 'rate_n_flags' not described in 'iwlagn_hwrate_to_tx_control'
drivers/net/wireless/intel/iwlwifi/dvm/tx.c:811: warning: Function parameter or member 'info' not described in 'iwlagn_hwrate_to_tx_control'
drivers/net/wireless/intel/iwlwifi/dvm/tx.c:1267: warning: Function parameter or member 'priv' not described in 'iwlagn_rx_reply_compressed_ba'
drivers/net/wireless/intel/iwlwifi/dvm/tx.c:1267: warning: Function parameter or member 'rxb' not described in 'iwlagn_rx_reply_compressed_ba'
Cc: Johannes Berg <johannes.berg@intel.com>
Cc: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Cc: Luca Coelho <luciano.coelho@intel.com>
Cc: Intel Linux Wireless <linuxwifi@intel.com>
Cc: Kalle Valo <kvalo@codeaurora.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: linux-wireless@vger.kernel.org
Cc: netdev@vger.kernel.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20200910065431.657636-4-lee.jones@linaro.org
None of these headers attempt to document any function parameters.
Fixes the following W=1 kernel build warning(s):
drivers/net/wireless/intel/iwlwifi/dvm/rs.c:165: warning: cannot understand function prototype: 'const u16 expected_tpt_legacy[IWL_RATE_COUNT] = '
drivers/net/wireless/intel/iwlwifi/dvm/rs.c:329: warning: Function parameter or member 'priv' not described in 'rs_program_fix_rate'
drivers/net/wireless/intel/iwlwifi/dvm/rs.c:329: warning: Function parameter or member 'lq_sta' not described in 'rs_program_fix_rate'
drivers/net/wireless/intel/iwlwifi/dvm/rs.c:452: warning: Function parameter or member 'tbl' not described in 'rs_collect_tx_data'
drivers/net/wireless/intel/iwlwifi/dvm/rs.c:452: warning: Function parameter or member 'scale_index' not described in 'rs_collect_tx_data'
drivers/net/wireless/intel/iwlwifi/dvm/rs.c:452: warning: Function parameter or member 'attempts' not described in 'rs_collect_tx_data'
drivers/net/wireless/intel/iwlwifi/dvm/rs.c:452: warning: Function parameter or member 'successes' not described in 'rs_collect_tx_data'
drivers/net/wireless/intel/iwlwifi/dvm/rs.c:681: warning: Function parameter or member 'sta' not described in 'rs_use_green'
drivers/net/wireless/intel/iwlwifi/dvm/rs.c:702: warning: Function parameter or member 'lq_sta' not described in 'rs_get_supported_rates'
drivers/net/wireless/intel/iwlwifi/dvm/rs.c:702: warning: Function parameter or member 'hdr' not described in 'rs_get_supported_rates'
drivers/net/wireless/intel/iwlwifi/dvm/rs.c:702: warning: Function parameter or member 'rate_type' not described in 'rs_get_supported_rates'
drivers/net/wireless/intel/iwlwifi/dvm/rs.c:2628: warning: duplicate section name 'NOTE'
drivers/net/wireless/intel/iwlwifi/dvm/rs.c:2632: warning: Function parameter or member 'priv' not described in 'rs_initialize_lq'
drivers/net/wireless/intel/iwlwifi/dvm/rs.c:2632: warning: Function parameter or member 'sta' not described in 'rs_initialize_lq'
drivers/net/wireless/intel/iwlwifi/dvm/rs.c:2632: warning: Function parameter or member 'lq_sta' not described in 'rs_initialize_lq'
Cc: Johannes Berg <johannes.berg@intel.com>
Cc: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Cc: Luca Coelho <luciano.coelho@intel.com>
Cc: Intel Linux Wireless <linuxwifi@intel.com>
Cc: Kalle Valo <kvalo@codeaurora.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: linux-wireless@vger.kernel.org
Cc: netdev@vger.kernel.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20200910065431.657636-3-lee.jones@linaro.org
None of these headers attempt to document any function parameters.
Fixes the following W=1 kernel build warning(s):
drivers/net/wireless/intel/iwlwifi/dvm/main.c:388: warning: Function parameter or member 't' not described in 'iwl_bg_statistics_periodic'
drivers/net/wireless/intel/iwlwifi/dvm/main.c:545: warning: Function parameter or member 't' not described in 'iwl_bg_ucode_trace'
drivers/net/wireless/intel/iwlwifi/dvm/main.c:771: warning: Function parameter or member 'priv' not described in 'iwl_alive_start'
drivers/net/wireless/intel/iwlwifi/dvm/main.c:1692: warning: Function parameter or member 'priv' not described in 'iwl_print_event_log'
drivers/net/wireless/intel/iwlwifi/dvm/main.c:1692: warning: Function parameter or member 'start_idx' not described in 'iwl_print_event_log'
drivers/net/wireless/intel/iwlwifi/dvm/main.c:1692: warning: Function parameter or member 'num_events' not described in 'iwl_print_event_log'
drivers/net/wireless/intel/iwlwifi/dvm/main.c:1692: warning: Function parameter or member 'mode' not described in 'iwl_print_event_log'
drivers/net/wireless/intel/iwlwifi/dvm/main.c:1692: warning: Function parameter or member 'pos' not described in 'iwl_print_event_log'
drivers/net/wireless/intel/iwlwifi/dvm/main.c:1692: warning: Function parameter or member 'buf' not described in 'iwl_print_event_log'
drivers/net/wireless/intel/iwlwifi/dvm/main.c:1692: warning: Function parameter or member 'bufsz' not described in 'iwl_print_event_log'
drivers/net/wireless/intel/iwlwifi/dvm/main.c:1772: warning: Function parameter or member 'priv' not described in 'iwl_print_last_event_logs'
drivers/net/wireless/intel/iwlwifi/dvm/main.c:1772: warning: Function parameter or member 'capacity' not described in 'iwl_print_last_event_logs'
drivers/net/wireless/intel/iwlwifi/dvm/main.c:1772: warning: Function parameter or member 'num_wraps' not described in 'iwl_print_last_event_logs'
drivers/net/wireless/intel/iwlwifi/dvm/main.c:1772: warning: Function parameter or member 'next_entry' not described in 'iwl_print_last_event_logs'
drivers/net/wireless/intel/iwlwifi/dvm/main.c:1772: warning: Function parameter or member 'size' not described in 'iwl_print_last_event_logs'
drivers/net/wireless/intel/iwlwifi/dvm/main.c:1772: warning: Function parameter or member 'mode' not described in 'iwl_print_last_event_logs'
drivers/net/wireless/intel/iwlwifi/dvm/main.c:1772: warning: Function parameter or member 'pos' not described in 'iwl_print_last_event_logs'
drivers/net/wireless/intel/iwlwifi/dvm/main.c:1772: warning: Function parameter or member 'buf' not described in 'iwl_print_last_event_logs'
drivers/net/wireless/intel/iwlwifi/dvm/main.c:1772: warning: Function parameter or member 'bufsz' not described in 'iwl_print_last_event_logs'
Cc: Johannes Berg <johannes.berg@intel.com>
Cc: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Cc: Luca Coelho <luciano.coelho@intel.com>
Cc: Intel Linux Wireless <linuxwifi@intel.com>
Cc: Kalle Valo <kvalo@codeaurora.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: linux-wireless@vger.kernel.org
Cc: netdev@vger.kernel.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20200910065431.657636-2-lee.jones@linaro.org
The user is allowed to change beacon tx rate (HT/VHT/HE) from hostapd.
This information needs to be passed to the driver when the rate control
is offloaded to the firmware. The driver capability of allowing beacon
rate is already validated in cfg80211, so simply passing the rate
information to the driver is enough.
Signed-off-by: Rajkumar Manoharan <rmanohar@codeaurora.org>
Link: https://lore.kernel.org/r/1601762658-15627-1-git-send-email-rmanohar@codeaurora.org
[adjust commit message slightly]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Simon reported an issue with the current scalar32_min_max_or() implementation.
That is, compared to the other 32 bit subreg tracking functions, the code in
scalar32_min_max_or() stands out that it's using the 64 bit registers instead
of 32 bit ones. This leads to bounds tracking issues, for example:
[...]
8: R0=map_value(id=0,off=0,ks=4,vs=48,imm=0) R10=fp0 fp-8=mmmmmmmm
8: (79) r1 = *(u64 *)(r0 +0)
R0=map_value(id=0,off=0,ks=4,vs=48,imm=0) R10=fp0 fp-8=mmmmmmmm
9: R0=map_value(id=0,off=0,ks=4,vs=48,imm=0) R1_w=inv(id=0) R10=fp0 fp-8=mmmmmmmm
9: (b7) r0 = 1
10: R0_w=inv1 R1_w=inv(id=0) R10=fp0 fp-8=mmmmmmmm
10: (18) r2 = 0x600000002
12: R0_w=inv1 R1_w=inv(id=0) R2_w=inv25769803778 R10=fp0 fp-8=mmmmmmmm
12: (ad) if r1 < r2 goto pc+1
R0_w=inv1 R1_w=inv(id=0,umin_value=25769803778) R2_w=inv25769803778 R10=fp0 fp-8=mmmmmmmm
13: R0_w=inv1 R1_w=inv(id=0,umin_value=25769803778) R2_w=inv25769803778 R10=fp0 fp-8=mmmmmmmm
13: (95) exit
14: R0_w=inv1 R1_w=inv(id=0,umax_value=25769803777,var_off=(0x0; 0x7ffffffff)) R2_w=inv25769803778 R10=fp0 fp-8=mmmmmmmm
14: (25) if r1 > 0x0 goto pc+1
R0_w=inv1 R1_w=inv(id=0,umax_value=0,var_off=(0x0; 0x7fffffff),u32_max_value=2147483647) R2_w=inv25769803778 R10=fp0 fp-8=mmmmmmmm
15: R0_w=inv1 R1_w=inv(id=0,umax_value=0,var_off=(0x0; 0x7fffffff),u32_max_value=2147483647) R2_w=inv25769803778 R10=fp0 fp-8=mmmmmmmm
15: (95) exit
16: R0_w=inv1 R1_w=inv(id=0,umin_value=1,umax_value=25769803777,var_off=(0x0; 0x77fffffff),u32_max_value=2147483647) R2_w=inv25769803778 R10=fp0 fp-8=mmmmmmmm
16: (47) r1 |= 0
17: R0_w=inv1 R1_w=inv(id=0,umin_value=1,umax_value=32212254719,var_off=(0x1; 0x700000000),s32_max_value=1,u32_max_value=1) R2_w=inv25769803778 R10=fp0 fp-8=mmmmmmmm
[...]
The bound tests on the map value force the upper unsigned bound to be 25769803777
in 64 bit (0b11000000000000000000000000000000001) and then lower one to be 1. By
using OR they are truncated and thus result in the range [1,1] for the 32 bit reg
tracker. This is incorrect given the only thing we know is that the value must be
positive and thus 2147483647 (0b1111111111111111111111111111111) at max for the
subregs. Fix it by using the {u,s}32_{min,max}_value vars instead. This also makes
sense, for example, for the case where we update dst_reg->s32_{min,max}_value in
the else branch we need to use the newly computed dst_reg->u32_{min,max}_value as
we know that these are positive. Previously, in the else branch the 64 bit values
of umin_value=1 and umax_value=32212254719 were used and latter got truncated to
be 1 as upper bound there. After the fix the subreg range is now correct:
[...]
8: R0=map_value(id=0,off=0,ks=4,vs=48,imm=0) R10=fp0 fp-8=mmmmmmmm
8: (79) r1 = *(u64 *)(r0 +0)
R0=map_value(id=0,off=0,ks=4,vs=48,imm=0) R10=fp0 fp-8=mmmmmmmm
9: R0=map_value(id=0,off=0,ks=4,vs=48,imm=0) R1_w=inv(id=0) R10=fp0 fp-8=mmmmmmmm
9: (b7) r0 = 1
10: R0_w=inv1 R1_w=inv(id=0) R10=fp0 fp-8=mmmmmmmm
10: (18) r2 = 0x600000002
12: R0_w=inv1 R1_w=inv(id=0) R2_w=inv25769803778 R10=fp0 fp-8=mmmmmmmm
12: (ad) if r1 < r2 goto pc+1
R0_w=inv1 R1_w=inv(id=0,umin_value=25769803778) R2_w=inv25769803778 R10=fp0 fp-8=mmmmmmmm
13: R0_w=inv1 R1_w=inv(id=0,umin_value=25769803778) R2_w=inv25769803778 R10=fp0 fp-8=mmmmmmmm
13: (95) exit
14: R0_w=inv1 R1_w=inv(id=0,umax_value=25769803777,var_off=(0x0; 0x7ffffffff)) R2_w=inv25769803778 R10=fp0 fp-8=mmmmmmmm
14: (25) if r1 > 0x0 goto pc+1
R0_w=inv1 R1_w=inv(id=0,umax_value=0,var_off=(0x0; 0x7fffffff),u32_max_value=2147483647) R2_w=inv25769803778 R10=fp0 fp-8=mmmmmmmm
15: R0_w=inv1 R1_w=inv(id=0,umax_value=0,var_off=(0x0; 0x7fffffff),u32_max_value=2147483647) R2_w=inv25769803778 R10=fp0 fp-8=mmmmmmmm
15: (95) exit
16: R0_w=inv1 R1_w=inv(id=0,umin_value=1,umax_value=25769803777,var_off=(0x0; 0x77fffffff),u32_max_value=2147483647) R2_w=inv25769803778 R10=fp0 fp-8=mmmmmmmm
16: (47) r1 |= 0
17: R0_w=inv1 R1_w=inv(id=0,umin_value=1,umax_value=32212254719,var_off=(0x0; 0x77fffffff),u32_max_value=2147483647) R2_w=inv25769803778 R10=fp0 fp-8=mmmmmmmm
[...]
Fixes: 3f50f132d840 ("bpf: Verifier, do explicit ALU32 bounds tracking")
Reported-by: Simon Scannell <scannell.smn@gmail.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Reviewed-by: John Fastabend <john.fastabend@gmail.com>
Acked-by: Alexei Starovoitov <ast@kernel.org>
the files under /80211 calls kernel-doc script 207 times, one for each
single function and doc chapter. Due to that, it takes a lot of time
handling it:
$ touch Documentation/driver-api/80211/*rst && time make SPHINXDIRS=driver-api/80211 htmldocs
...
real 0m22,928s
user 0m21,644s
sys 0m1,334s
Reduce the build time by doing only one kernel-doc call
per functions that belong to the same group. With that, there's now
50 calls to kernel-doc, which makes the build time for those docs
62% faster:
$ touch Documentation/driver-api/80211/*rst && time make SPHINXDIRS=driver-api/80211 htmldocs
...
real 0m8,666s
user 0m8,084s
sys 0m0,642s
As a side effect, it should now be easier to add newer
functions, as there's no need to repeat the kernel-doc
pattern.
Measurements made on a NUC8i7HNK machine with lots of ram
and a fast SSD disk with Sphinx 3.2.1.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Link: https://lore.kernel.org/r/f0085721d85ebc3a77164b457ed948eee48b55df.1601890703.git.mchehab+huawei@kernel.org
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
As discovered by syzbot, cfg80211 was accepting S1G
channel widths on non-S1G bands. Add a check for this, and
consolidate the 1MHz frequency check as it ends up being a
subset of the others.
Reported-by: syzbot+92715a0eccd6c881bc32@syzkaller.appspotmail.com
Fixes: 11b34737b18a ("nl80211: support setting S1G channels")
Signed-off-by: Thomas Pedersen <thomas@adapt-ip.com>
Link: https://lore.kernel.org/r/20201005165122.17583-1-thomas@adapt-ip.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
last_rate is initialized to zero by sta_info_alloc(), but
this indicates legacy bitrate for the last TX rate (and
invalid for the last RX rate). To avoid a warning when
decoding the last rate as legacy (before a data frame
has been sent), initialize them as S1G MCS.
Signed-off-by: Thomas Pedersen <thomas@adapt-ip.com>
Link: https://lore.kernel.org/r/20201005164522.18069-2-thomas@adapt-ip.com
[rename to ieee80211_s1g_sta_rate_init(), seems more appropriate]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Even though a driver or mac80211 shouldn't produce a
legacy bitrate if sband->bitrates doesn't exist, don't
crash if that is the case either.
This fixes a kernel panic if station dump is run before
last_rate can be updated with a data frame when
sband->bitrates is missing (eg. in S1G bands).
Signed-off-by: Thomas Pedersen <thomas@adapt-ip.com>
Link: https://lore.kernel.org/r/20201005164522.18069-1-thomas@adapt-ip.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Andrii Nakryiko says:
====================
Patch set implements logic in libbpf to auto-adjust memory size (1-, 2-, 4-,
8-bytes) of load/store (LD/ST/STX) instructions which have BPF CO-RE field
offset relocation associated with it. In practice this means transparent
handling of 32-bit kernels, both pointer and unsigned integers. Signed
integers are not relocatable with zero-extending loads/stores, so libbpf
poisons them and generates a warning. If/when BPF gets support for
sign-extending loads/stores, it would be possible to automatically relocate
them as well.
All the details are contained in patch #2 comments and commit message.
Patch #3 is a simple change in libbpf to make advanced testing with custom BTF
easier. Patch #4 validates correct uses of auto-resizable loads, as well as
check that libbpf fails invalid uses. Patch #1 skips CO-RE relocation for
programs that had bpf_program__set_autoload(prog, false) set on them, reducing
warnings and noise.
v2->v3:
- fix copyright (Alexei);
v1->v2:
- more consistent names for instruction mem size convertion routines (Alexei);
- extended selftests to use relocatable STX instructions (Alexei);
- added a fix for skipping CO-RE relocation for non-loadable programs.
Cc: Luka Perkov <luka.perkov@sartura.hr>
Cc: Tony Ambardar <tony.ambardar@gmail.com>
====================
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Add selftests validating libbpf's auto-resizing of load/store instructions
when used with CO-RE relocations. An explicit and manual approach with using
bpf_core_read() is also demonstrated and tested. Separate BPF program is
supposed to fail due to using signed integers of sizes that differ from
kernel's sizes.
To reliably simulate 32-bit BTF (i.e., the one with sizeof(long) ==
sizeof(void *) == 4), selftest generates its own custom BTF and passes it as
a replacement for real kernel BTF. This allows to test 32/64-bitness mix on
all architectures.
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20201008001025.292064-5-andrii@kernel.org
Use generalized BTF parsing logic, making it possible to parse BTF both from
ELF file, as well as a raw BTF dump. This makes it easier to write custom
tests with manually generated BTFs.
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20201008001025.292064-4-andrii@kernel.org
Add support for patching instructions of the following form:
- rX = *(T *)(rY + <off>);
- *(T *)(rX + <off>) = rY;
- *(T *)(rX + <off>) = <imm>, where T is one of {u8, u16, u32, u64}.
For such instructions, if the actual kernel field recorded in CO-RE relocation
has a different size than the one recorded locally (e.g., from vmlinux.h),
then libbpf will adjust T to an appropriate 1-, 2-, 4-, or 8-byte loads.
In general, such transformation is not always correct and could lead to
invalid final value being loaded or stored. But two classes of cases are
always safe:
- if both local and target (kernel) types are unsigned integers, but of
different sizes, then it's OK to adjust load/store instruction according to
the necessary memory size. Zero-extending nature of such instructions and
unsignedness make sure that the final value is always correct;
- pointer size mismatch between BPF target architecture (which is always
64-bit) and 32-bit host kernel architecture can be similarly resolved
automatically, because pointer is essentially an unsigned integer. Loading
32-bit pointer into 64-bit BPF register with zero extension will leave
correct pointer in the register.
Both cases are necessary to support CO-RE on 32-bit kernels, as `unsigned
long` in vmlinux.h generated from 32-bit kernel is 32-bit, but when compiled
with BPF program for BPF target it will be treated by compiler as 64-bit
integer. Similarly, pointers in vmlinux.h are 32-bit for kernel, but treated
as 64-bit values by compiler for BPF target. Both problems are now resolved by
libbpf for direct memory reads.
But similar transformations are useful in general when kernel fields are
"resized" from, e.g., unsigned int to unsigned long (or vice versa).
Now, similar transformations for signed integers are not safe to perform as
they will result in incorrect sign extension of the value. If such situation
is detected, libbpf will emit helpful message and will poison the instruction.
Not failing immediately means that it's possible to guard the instruction
based on kernel version (or other conditions) and make sure it's not
reachable.
If there is a need to read signed integers that change sizes between different
kernels, it's possible to use BPF_CORE_READ_BITFIELD() macro, which works both
with bitfields and non-bitfield integers of any signedness and handles
sign-extension properly. Also, bpf_core_read() with proper size and/or use of
bpf_core_field_size() relocation could allow to deal with such complicated
situations explicitly, if not so conventiently as direct memory reads.
Selftests added in a separate patch in progs/test_core_autosize.c demonstrate
both direct memory and probed use cases.
BPF_CORE_READ() is not changed and it won't deal with such situations as
automatically as direct memory reads due to the signedness integer
limitations, which are much harder to detect and control with compiler macro
magic. So it's encouraged to utilize direct memory reads as much as possible.
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20201008001025.292064-3-andrii@kernel.org
Bypass CO-RE relocations step for BPF programs that are not going to be
loaded. This allows to have BPF programs compiled in and disabled dynamically
if kernel is not supposed to provide enough relocation information. In such
case, there won't be unnecessary warnings about failed relocations.
Fixes: d929758101fc ("libbpf: Support disabling auto-loading BPF programs")
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20201008001025.292064-2-andrii@kernel.org
Some variables with incorrect type were passed to "of_property_read_u32"
API, "of_property_read_u32" API was expecting an "u32 *" but the formal
parameter that was passed was of type "int *". Fixed the issue by
changing the variable types from "int" to "u32" and initialized with a
default value. Fixed sparse warning.
Addresses-Coverity: "incompatible_param"
Addresses-Coverity: "UNINIT(Using uninitialized value)"
Signed-off-by: Srinivas Neeli <srinivas.neeli@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Link: https://lore.kernel.org/r/0651544d22f3c25893ca9d445b14823f0dfddfc8.1600073396.git.michal.simek@xilinx.com
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Since commit:
048e3a34a2e7 can: flexcan: poll MCR_LPM_ACK instead of GPR ACK for stop mode acknowledgment
the driver polls the IP core's internal bit MCR[LPM_ACK] as stop mode
acknowledge and not the acknowledgment on chip level.
This means the 4th and 5th value of the property "fsl,stop-mode" isn't used
anymore. This patch removes the used "ack_gpr" and "ack_bit" from the driver.
Link: http://lore.kernel.org/r/20201006203748.1750156-15-mkl@pengutronix.de
Fixes: 048e3a34a2e7 ("can: flexcan: poll MCR_LPM_ACK instead of GPR ACK for stop mode acknowledgment")
Cc: Joakim Zhang <qiangqing.zhang@nxp.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Since commit:
048e3a34a2e7 can: flexcan: poll MCR_LPM_ACK instead of GPR ACK for stop mode acknowledgment
the driver polls the IP core's internal bit MCR[LPM_ACK] as stop mode
acknowledge and not the acknowledgment on chip level.
This means the 4th and 5th value of the property "fsl,stop-mode" isn't used
anymore. It will be removed from the driver in the next patch, so remove it
from the binding documentation.
Link: http://lore.kernel.org/r/20201006203748.1750156-14-mkl@pengutronix.de
Fixes: 048e3a34a2e7 ("can: flexcan: poll MCR_LPM_ACK instead of GPR ACK for stop mode acknowledgment")
Cc: devicetree <devicetree@vger.kernel.org>
Cc: Joakim Zhang <qiangqing.zhang@nxp.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
The compatible is a pattern match. Explicitly list all possible values.
Also mention that the ls1028ar1 must be followed by lx2160ar1.
Signed-off-by: Michael Walle <michael@walle.cc>
Link: https://lore.kernel.org/r/20201001091131.30514-2-michael@walle.cc
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
