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This patch introduces support for a new architectured reply
code 0x8B indicating that a hypervisor layer (if any) has
rejected an ap message.
Linux may run as a guest on top of a hypervisor like zVM
or KVM. So the crypto hardware seen by the ap bus may be
restricted by the hypervisor for example only a subset like
only clear key crypto requests may be supported. Other
requests will be filtered out - rejected by the hypervisor.
The new reply code 0x8B will appear in such cases and needs
to get recognized by the ap bus and zcrypt device driver zoo.
Signed-off-by: Harald Freudenberger <freude@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
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Pull s390 updates from Vasily Gorbik:
- Adjust PMU device drivers registration to avoid WARN_ON and few other
perf improvements.
- Enhance tracing in vfio-ccw.
- Few stack unwinder fixes and improvements, convert get_wchan custom
stack unwinding to generic api usage.
- Fixes for mm helpers issues uncovered with tests validating
architecture page table helpers.
- Fix noexec bit handling when hardware doesn't support it.
- Fix memleak and unsigned value compared with zero bugs in crypto
code. Minor code simplification.
- Fix crash during kdump with kasan enabled kernel.
- Switch bug and alternatives from asm to asm_inline to improve
inlining decisions.
- Use 'depends on cc-option' for MARCH and TUNE options in Kconfig, add
z13s and z14 ZR1 to TUNE descriptions.
- Minor head64.S simplification.
- Fix physical to logical CPU map for SMT.
- Several cleanups in qdio code.
- Other minor cleanups and fixes all over the code.
* tag 's390-5.5-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (41 commits)
s390/cpumf: Adjust registration of s390 PMU device drivers
s390/smp: fix physical to logical CPU map for SMT
s390/early: move access registers setup in C code
s390/head64: remove unnecessary vdso_per_cpu_data setup
s390/early: move control registers setup in C code
s390/kasan: support memcpy_real with TRACE_IRQFLAGS
s390/crypto: Fix unsigned variable compared with zero
s390/pkey: use memdup_user() to simplify code
s390/pkey: fix memory leak within _copy_apqns_from_user()
s390/disassembler: don't hide instruction addresses
s390/cpum_sf: Assign error value to err variable
s390/cpum_sf: Replace function name in debug statements
s390/cpum_sf: Use consistant debug print format for sampling
s390/unwind: drop unnecessary code around calling ftrace_graph_ret_addr()
s390: add error handling to perf_callchain_kernel
s390: always inline current_stack_pointer()
s390/mm: add mm_pxd_folded() checks to pxd_free()
s390/mm: properly clear _PAGE_NOEXEC bit when it is not supported
s390/mm: simplify page table helpers for large entries
s390/mm: make pmd/pud_bad() report large entries as bad
...
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Generated by: scripts/coccinelle/api/memdup_user.cocci
Link: http://lkml.kernel.org/r/aca044e8-e4b2-eda8-d724-b08772a44ed9@web.de
[borntraeger@de.ibm.com: use ==0 instead of <=0 for a size_t variable]
[heiko.carstens@de.ibm.com: split bugfix into separate patch; shorten changelog]
Signed-off-by: Markus Elfring <Markus.Elfring@web.de>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
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Fixes: f2bbc96e7cfad ("s390/pkey: add CCA AES cipher key support")
Reported-by: Markus Elfring <Markus.Elfring@web.de>
Reported-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
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If a process is interrupted while accessing the crypto device and the
global ap_perms_mutex is contented, release() could return early and
fail to free related resources.
Fixes: 00fab2350e6b ("s390/zcrypt: multiple zcrypt device nodes support")
Cc: <stable@vger.kernel.org> # 4.19
Cc: Harald Freudenberger <freude@linux.ibm.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
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Pull more s390 updates from Vasily Gorbik:
- Fix three kasan findings
- Add PERF_EVENT_IOC_PERIOD ioctl support
- Add Crypto Express7S support and extend sysfs attributes for pkey
- Minor common I/O layer documentation corrections
* tag 's390-5.4-2' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
s390/cio: exclude subchannels with no parent from pseudo check
s390/cio: avoid calling strlen on null pointer
s390/topology: avoid firing events before kobjs are created
s390/cpumf: Remove mixed white space
s390/cpum_sf: Support ioctl PERF_EVENT_IOC_PERIOD
s390/zcrypt: CEX7S exploitation support
s390/cio: fix intparm documentation
s390/pkey: Add sysfs attributes to emit AES CIPHER key blobs
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This patch adds CEX7 exploitation support for the AP bus code,
the zcrypt device driver zoo and the vfio device driver.
Signed-off-by: Harald Freudenberger <freude@linux.ibm.com>
Reviewed-by: Ingo Franzki <ifranzki@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
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Now that the pkey kernel module also supports CCA AES CIPHER keys:
Add binary read-only sysfs attributes for the pkey module
that can be used to read random CCA AES CIPHER secure keys from,
similar to the already existing sysfs attributes for AES DATA and
random protected keys. Keys are read from these attributes using
a cat-like interface.
A typical use case for those keys is to encrypt a swap device
using the paes cipher. During processing of /etc/crypttab, the
CCA random AES CIPHER secure key to encrypt the swap device is
read from one of the attributes.
The following attributes are added:
ccacipher/ccacipher_aes_128
ccacipher/ccacipher_aes_192
ccacipher/ccacipher_aes_256
ccacipher/ccacipher_aes_128_xts
ccacipher/ccacipher_aes_256_xts
Each attribute emits a secure key blob for the corresponding
key size and cipher mode.
Signed-off-by: Ingo Franzki <ifranzki@linux.ibm.com>
Reviewed-by: Harald Freudenberger <freude@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
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Pull LED updates from Jacek Anaszewski:
"In this cycle we've finally managed to contribute the patch set
sorting out LED naming issues. Besides that there are many changes
scattered among various LED class drivers and triggers.
LED naming related improvements:
- add new 'function' and 'color' fwnode properties and deprecate
'label' property which has been frequently abused for conveying
vendor specific names that have been available in sysfs anyway
- introduce a set of standard LED_FUNCTION* definitions
- introduce a set of standard LED_COLOR_ID* definitions
- add a new {devm_}led_classdev_register_ext() API with the
capability of automatic LED name composition basing on the
properties available in the passed fwnode; the function is
backwards compatible in a sense that it uses 'label' data, if
present in the fwnode, for creating LED name
- add tools/leds/get_led_device_info.sh script for retrieving LED
vendor, product and bus names, if applicable; it also performs
basic validation of an LED name
- update following drivers and their DT bindings to use the new LED
registration API:
- leds-an30259a, leds-gpio, leds-as3645a, leds-aat1290, leds-cr0014114,
leds-lm3601x, leds-lm3692x, leds-lp8860, leds-lt3593, leds-sc27xx-blt
Other LED class improvements:
- replace {devm_}led_classdev_register() macros with inlines
- allow to call led_classdev_unregister() unconditionally
- switch to use fwnode instead of be stuck with OF one
LED triggers improvements:
- led-triggers:
- fix dereferencing of null pointer
- fix a memory leak bug
- ledtrig-gpio:
- GPIO 0 is valid
Drop superseeded apu2/3 support from leds-apu since for apu2+ a newer,
more complete driver exists, based on a generic driver for the AMD
SOCs gpio-controller, supporting LEDs as well other devices:
- drop profile field from priv data
- drop iosize field from priv data
- drop enum_apu_led_platform_types
- drop superseeded apu2/3 led support
- add pr_fmt prefix for better log output
- fix error message on probing failure
Other misc fixes and improvements to existing LED class drivers:
- leds-ns2, leds-max77650:
- add of_node_put() before return
- leds-pwm, leds-is31fl32xx:
- use struct_size() helper
- leds-lm3697, leds-lm36274, leds-lm3532:
- switch to use fwnode_property_count_uXX()
- leds-lm3532:
- fix brightness control for i2c mode
- change the define for the fs current register
- fixes for the driver for stability
- add full scale current configuration
- dt: Add property for full scale current.
- avoid potentially unpaired regulator calls
- move static keyword to the front of declarations
- fix optional led-max-microamp prop error handling
- leds-max77650:
- add of_node_put() before return
- add MODULE_ALIAS()
- Switch to fwnode property API
- leds-as3645a:
- fix misuse of strlcpy
- leds-netxbig:
- add of_node_put() in netxbig_leds_get_of_pdata()
- remove legacy board-file support
- leds-is31fl319x:
- simplify getting the adapter of a client
- leds-ti-lmu-common:
- fix coccinelle issue
- move static keyword to the front of declaration
- leds-syscon:
- use resource managed variant of device register
- leds-ktd2692:
- fix a typo in the name of a constant
- leds-lp5562:
- allow firmware files up to the maximum length
- leds-an30259a:
- fix typo
- leds-pca953x:
- include the right header"
* tag 'leds-for-5.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/j.anaszewski/linux-leds: (72 commits)
leds: lm3532: Fix optional led-max-microamp prop error handling
led: triggers: Fix dereferencing of null pointer
leds: ti-lmu-common: Move static keyword to the front of declaration
leds: lm3532: Move static keyword to the front of declarations
leds: trigger: gpio: GPIO 0 is valid
leds: pwm: Use struct_size() helper
leds: is31fl32xx: Use struct_size() helper
leds: ti-lmu-common: Fix coccinelle issue in TI LMU
leds: lm3532: Avoid potentially unpaired regulator calls
leds: syscon: Use resource managed variant of device register
leds: Replace {devm_}led_classdev_register() macros with inlines
leds: Allow to call led_classdev_unregister() unconditionally
leds: lm3532: Add full scale current configuration
dt: lm3532: Add property for full scale current.
leds: lm3532: Fixes for the driver for stability
leds: lm3532: Change the define for the fs current register
leds: lm3532: Fix brightness control for i2c mode
leds: Switch to use fwnode instead of be stuck with OF one
leds: max77650: Switch to fwnode property API
led: triggers: Fix a memory leak bug
...
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Pull s390 updates from Vasily Gorbik:
- Add support for IBM z15 machines.
- Add SHA3 and CCA AES cipher key support in zcrypt and pkey
refactoring.
- Move to arch_stack_walk infrastructure for the stack unwinder.
- Various kasan fixes and improvements.
- Various command line parsing fixes.
- Improve decompressor phase debuggability.
- Lift no bss usage restriction for the early code.
- Use refcount_t for reference counters for couple of places in mm
code.
- Logging improvements and return code fix in vfio-ccw code.
- Couple of zpci fixes and minor refactoring.
- Remove some outdated documentation.
- Fix secure boot detection.
- Other various minor code clean ups.
* tag 's390-5.4-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (48 commits)
s390: remove pointless drivers-y in drivers/s390/Makefile
s390/cpum_sf: Fix line length and format string
s390/pci: fix MSI message data
s390: add support for IBM z15 machines
s390/crypto: Support for SHA3 via CPACF (MSA6)
s390/startup: add pgm check info printing
s390/crypto: xts-aes-s390 fix extra run-time crypto self tests finding
vfio-ccw: fix error return code in vfio_ccw_sch_init()
s390: vfio-ap: fix warning reset not completed
s390/base: remove unused s390_base_mcck_handler
s390/sclp: Fix bit checked for has_sipl
s390/zcrypt: fix wrong handling of cca cipher keygenflags
s390/kasan: add kdump support
s390/setup: avoid using strncmp with hardcoded length
s390/sclp: avoid using strncmp with hardcoded length
s390/module: avoid using strncmp with hardcoded length
s390/pci: avoid using strncmp with hardcoded length
s390/kaslr: reserve memory for kasan usage
s390/mem_detect: provide single get_mem_detect_end
s390/cmma: reuse kstrtobool for option value parsing
...
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The intention seems to be to warn once when we don't wait enough for the
reset to complete. Let's use the right retry counter to accomplish that
semantic.
Signed-off-by: Halil Pasic <pasic@linux.ibm.com>
Link: https://lore.kernel.org/r/20190903133618.9122-1-pasic@linux.ibm.com
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
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Tests showed that the keygenflags parameter is not handled
correctly within the zcrypt ccamisc generate cca cipher key
code. A similar code is used with cca cipher key value import
and there the flags are handled correctly. For unknown reason
these lines have not been updated for the generate function
and so this patch now introduces these two lines of code.
This affects only pkey with the use of CCA cipher keys and
the use of additional key generate flags.
Fixes: 4bc123b18ce6 ("s390/zcrypt: Add low level functions for CCA AES cipher keys")
Signed-off-by: Harald Freudenberger <freude@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
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Introduce new ioctls and structs to be used with these new ioctls
which are able to handle CCA AES secure keys and CCA AES cipher keys:
PKEY_GENSECK2: Generate secure key, version 2.
Generate either a CCA AES secure key or a CCA AES cipher key.
PKEY_CLR2SECK2: Generate secure key from clear key value, version 2.
Construct a CCA AES secure key or CCA AES cipher key from a given
clear key value.
PKEY_VERIFYKEY2: Verify the given secure key, version 2.
Check for correct key type. If cardnr and domain are given, also
check if this apqn is able to handle this type of key. If cardnr and
domain are 0xFFFF, on return these values are filled with an apqn
able to handle this key. The function also checks for the master key
verification patterns of the key matching to the current or
alternate mkvp of the apqn. CCA AES cipher keys are also checked
for CPACF export allowed (CPRTCPAC flag). Currently CCA AES secure
keys and CCA AES cipher keys are supported (may get extended in the
future).
PKEY_KBLOB2PROTK2: Transform a key blob (of any type) into
a protected key, version 2. Difference to version 1 is only that
this new ioctl has additional parameters to provide a list of
apqns to be used for the transformation.
PKEY_APQNS4K: Generate a list of APQNs based on the key blob given.
Is able to find out which type of secure key is given (CCA AES
secure key or CCA AES cipher key) and tries to find all matching
crypto cards based on the MKVP and maybe other criterias (like CCA
AES cipher keys need a CEX6C or higher). The list of APQNs is
further filtered by the key's mkvp which needs to match to either
the current mkvp or the alternate mkvp (which is the old mkvp on CCA
adapters) of the apqns. The flags argument may be used to limit the
matching apqns. If the PKEY_FLAGS_MATCH_CUR_MKVP is given, only the
current mkvp of each apqn is compared. Likewise with the
PKEY_FLAGS_MATCH_ALT_MKVP. If both are given it is assumed to return
apqns where either the current or the alternate mkvp matches. If no
matching APQN is found, the ioctl returns with 0 but the
apqn_entries value is 0.
PKEY_APQNS4KT: Generate a list of APQNs based on the key type given.
Build a list of APQNs based on the given key type and maybe further
restrict the list by given master key verification patterns.
For different key types there may be different ways to match the
master key verification patterns. For CCA keys (CCA data key and CCA
cipher key) the first 8 bytes of cur_mkvp refer to the current mkvp
value of the apqn and the first 8 bytes of the alt_mkvp refer to the
old mkvp. The flags argument controls if the apqns current and/or
alternate mkvp should match. If the PKEY_FLAGS_MATCH_CUR_MKVP is
given, only the current mkvp of each apqn is compared. Likewise with
the PKEY_FLAGS_MATCH_ALT_MKVP. If both are given, it is assumed to
return apqns where either the current or the alternate mkvp
matches. If no matching APQN is found, the ioctl returns with 0 but
the apqn_entries value is 0.
These new ioctls are now prepared for another new type of secure key
blob which may come in the future. They all use a pointer to the key
blob and a key blob length information instead of some hardcoded byte
array. They all use the new enums pkey_key_type, pkey_key_size and
pkey_key_info for getting/setting key type, key size and additional
info about the key. All but the PKEY_VERIFY2 ioctl now work based on a
list of apqns. This list is walked through trying to perform the
operation on exactly this apqn without any further checking (like card
type or online state). If the apqn fails, simple the next one in the
list is tried until success (return 0) or the end of the list is
reached (return -1 with errno ENODEV). All apqns in the list need to
be exact apqns (0xFFFF as any card or domain is not allowed). There
are two new ioctls which can be used to build a list of apqns based on
a key or key type and maybe restricted by match to a current or
alternate master key verifcation pattern.
Signed-off-by: Harald Freudenberger <freude@linux.ibm.com>
Reviewed-by: Ingo Franzki <ifranzki@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
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This patch adds low level functions, structs and defines to support
CCA AES cipher keys:
- struct cipherkeytoken can be used for an inside view of the CCA AES
cipher key token blob.
- function cca_cipher2protkey() derives an CPACF protected key from an
CCA AES cipher key.
- function cca_gencipherkey() generates an CCA AES cipher key with
random value.
- function cca_findcard2() constructs a list of apqns based on input
constrains like min hardware type, mkvp values.
- cca_check_secaescipherkey() does a check on the given CCA AES cipher
key blob.
- cca_clr2cipherkey() generates an CCA AES cipher key from a given
clear key value.
Signed-off-by: Harald Freudenberger <freude@linux.ibm.com>
Reviewed-by: Ingo Franzki <ifranzki@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
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Rework and extension of the cca_findcard function to be prepared for
other types of secure key blobs. Split the function and extract an
internal function which has no awareness of key blobs any
more. Improve this function and the helper code around to be able to
check for a minimal crypto card hardware level (Background: the newer
AES cipher keys need to match to the master key verification pattern
and need to have a crypto card CEX6 or higher).
No API change, neither for the in-kernel API nor the ioctl interface.
Signed-off-by: Harald Freudenberger <freude@linux.ibm.com>
Reviewed-by: Ingo Franzki <ifranzki@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
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There are a lot of pkey functions exported as in-kernel callable
API functions but not used at all. This patch narrows down the
pkey in-kernel API to what is currently only used and exploited.
Within the kernel just use u32 without any leading __u32. Also
functions declared in a header file in arch/s390/include/asm
don't need a comment 'In-kernel API', this is by definition,
otherwise the header file would be in arch/s390/include/uapi/asm.
Signed-off-by: Harald Freudenberger <freude@linux.ibm.com>
Reviewed-by: Ingo Franzki <ifranzki@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
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Silence the following warnings when built with -Wimplicit-fallthrough=3
enabled by default since 5.3-rc2:
In file included from ./include/linux/preempt.h:11,
from ./include/linux/spinlock.h:51,
from ./include/linux/mmzone.h:8,
from ./include/linux/gfp.h:6,
from ./include/linux/slab.h:15,
from drivers/s390/crypto/ap_queue.c:13:
drivers/s390/crypto/ap_queue.c: In function 'ap_sm_recv':
./include/linux/list.h:577:2: warning: this statement may fall through [-Wimplicit-fallthrough=]
577 | for (pos = list_first_entry(head, typeof(*pos), member); \
| ^~~
drivers/s390/crypto/ap_queue.c:147:3: note: in expansion of macro 'list_for_each_entry'
147 | list_for_each_entry(ap_msg, &aq->pendingq, list) {
| ^~~~~~~~~~~~~~~~~~~
drivers/s390/crypto/ap_queue.c:155:2: note: here
155 | case AP_RESPONSE_NO_PENDING_REPLY:
| ^~~~
drivers/s390/crypto/zcrypt_msgtype6.c: In function 'convert_response_ep11_xcrb':
drivers/s390/crypto/zcrypt_msgtype6.c:871:6: warning: this statement may fall through [-Wimplicit-fallthrough=]
871 | if (msg->cprbx.cprb_ver_id == 0x04)
| ^
drivers/s390/crypto/zcrypt_msgtype6.c:874:2: note: here
874 | default: /* Unknown response type, this should NEVER EVER happen */
| ^~~~~~~
drivers/s390/crypto/zcrypt_msgtype6.c: In function 'convert_response_rng':
drivers/s390/crypto/zcrypt_msgtype6.c:901:6: warning: this statement may fall through [-Wimplicit-fallthrough=]
901 | if (msg->cprbx.cprb_ver_id == 0x02)
| ^
drivers/s390/crypto/zcrypt_msgtype6.c:907:2: note: here
907 | default: /* Unknown response type, this should NEVER EVER happen */
| ^~~~~~~
drivers/s390/crypto/zcrypt_msgtype6.c: In function 'convert_response_xcrb':
drivers/s390/crypto/zcrypt_msgtype6.c:838:6: warning: this statement may fall through [-Wimplicit-fallthrough=]
838 | if (msg->cprbx.cprb_ver_id == 0x02)
| ^
drivers/s390/crypto/zcrypt_msgtype6.c:844:2: note: here
844 | default: /* Unknown response type, this should NEVER EVER happen */
| ^~~~~~~
drivers/s390/crypto/zcrypt_msgtype6.c: In function 'convert_response_ica':
drivers/s390/crypto/zcrypt_msgtype6.c:801:6: warning: this statement may fall through [-Wimplicit-fallthrough=]
801 | if (msg->cprbx.cprb_ver_id == 0x02)
| ^
drivers/s390/crypto/zcrypt_msgtype6.c:808:2: note: here
808 | default: /* Unknown response type, this should NEVER EVER happen */
| ^~~~~~~
Acked-by: Patrick Steuer <patrick.steuer@de.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
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Add a helper to match a device by its type and provide wrappers
for {bus/class/driver}_find_device() APIs.
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Harald Freudenberger <freude@linux.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: linux-usb@vger.kernel.org
Cc: Oliver Neukum <oneukum@suse.com>
Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Tomas Winkler <tomas.winkler@intel.com>
Cc: "Rafael J. Wysocki" <rafael@kernel.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Ulf Hansson <ulf.hansson@linaro.org>
Cc: Joe Perches <joe@perches.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/20190723221838.12024-5-suzuki.poulose@arm.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Add a helper to match the device name for device lookup. Also
reuse this generic exported helper for the existing bus_find_device_by_name().
and add similar variants for driver/class.
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: Alexander Aring <alex.aring@gmail.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Dan Murphy <dmurphy@ti.com>
Cc: Harald Freudenberger <freude@linux.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Jacek Anaszewski <jacek.anaszewski@gmail.com>
Cc: Lee Jones <lee.jones@linaro.org>
Cc: linux-leds@vger.kernel.org
Cc: linux-rtc@vger.kernel.org
Cc: linux-usb@vger.kernel.org
Cc: linux-wpan@vger.kernel.org
Cc: Maxime Coquelin <mcoquelin.stm32@gmail.com>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: Peter Oberparleiter <oberpar@linux.ibm.com>
Cc: "Rafael J. Wysocki" <rafael@kernel.org>
Cc: Stefan Schmidt <stefan@datenfreihafen.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Acked-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20190723221838.12024-2-suzuki.poulose@arm.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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This patch extends the sysfs interface with two new attributes for the
CEX4, CEX5 and CEX6 crypto cards/queues in coprocessor ('CCA') mode:
/sys/devices/ap/cardxx/serialnr
/sys/devices/ap/cardxx/xx.yyyy/mkvps
The serialnr attribute is card based and shows the 8 character ASCII
serial number string which should unique identify the card.
The mkvps is queue based and displays 3 lines of information about the
new, current and old master key register:
AES NEW: <new_aes_mk_state> <new_aes_mk_mkvp>
AES CUR: <cur_aes_mk_state> <cur_aes_mk_mkvp>
AES OLD: <old_aes_mk_state> <old_aes_mk_mkvp>
with
<new_aes_mk_state>: 'empty' or 'partial' or 'full'
<cur_aes_mk_state>: 'valid' or 'invalid'
<old_aes_mk_state>: 'valid' or 'invalid'
<new_aes_mk_mkvp>, <cur_aes_mk_mkvp>, <old_aes_mk_mkvp>
8 byte hex string with leading 0x
MKVP means Master Key Verification Pattern and is a folded hash over
the key value. Only the states 'full' and 'valid' result in displaying
a useful mkvp, otherwise a mkvp of all bytes zero is shown. If for any
reason the FQ fails and the (cached) information is not available, the
state '-' will be shown with the mkvp value also '-'. The values shown
here are the very same as the cca panel tools displays. As of now only
the AES master keys states and verification patterns are shown. A CCA
APQN also has similar master key registers for DES, RSA and ECC. So
the content of this attribute may get extended.
Reading the sysfs attribute automatically triggers an FQ CPRB to be
sent to the queue as long as the queue is (soft-) online. For the
serialnr attribute the queue with the default domain id is addressed
(if available and valid). This is reasonable as it is assumed that
this sysfs interface is not performance critical and on the other side
a master key change should be visiable as soon as possible. When a
queue is (soft-) offline however, the cached values are displayed. If
no cached values are available, the serial number string will be empty
and the mkvp lines will show state '-' and mkvp value '-'.
Signed-off-by: Harald Freudenberger <freude@linux.ibm.com>
Reviewed-by: Ingo Franzki <ifranzki@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
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This patch widens the information held for cca crypto apqns.
Currently the current and old master key verification pattern
is used by the existing code. Now the new master key registers
mkvp, the 8 byte serial number and state info about each master
key register is part of the cca info cache.
In a next step this information will be used to provide some
additional attributes in sysfs for each CCA crypto adapter.
Signed-off-by: Harald Freudenberger <freude@linux.ibm.com>
Reviewed-by: Ingo Franzki <ifranzki@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
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Rework of the pkey code. Moved all the cca generic code
away from pkey_api.c into a new file zcrypt_ccamisc.c.
This new file is now part of the zcrypt device driver
and exports a bunch of cca functions to pkey and may
be called from other kernel modules as well.
The pkey ioctl API is unchanged.
Signed-off-by: Harald Freudenberger <freude@linux.ibm.com>
Reviewed-by: Ingo Franzki <ifranzki@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
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Pull more s390 updates from Vasily Gorbik:
- Fix integer overflow during stack frame unwind with invalid
backchain.
- Cleanup unused symbol export in zcrypt code.
- Fix MIO addressing control activation in PCI code and expose its
usage via sysfs.
- Fix kernel image signature verification report presence detection.
- Fix irq registration in vfio-ap code.
- Add CPU measurement counters for newer machines.
- Add base DASD thin provisioning support and code cleanups.
* tag 's390-5.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (21 commits)
s390/unwind: avoid int overflow in outside_of_stack
s390/zcrypt: remove the exporting of ap_query_configuration
s390/pci: add mio_enabled attribute
s390: fix setting of mio addressing control
s390/ipl: Fix detection of has_secure attribute
s390: vfio-ap: fix irq registration
s390/cpumf: Add extended counter set definitions for model 8561 and 8562
s390/dasd: Handle out-of-space constraint
s390/dasd: Add discard support for ESE volumes
s390/dasd: Use ALIGN_DOWN macro
s390/dasd: Make dasd_setup_queue() a discipline function
s390/dasd: Add new ioctl to release space
s390/dasd: Add dasd_sleep_on_queue_interruptible()
s390/dasd: Add missing intensity definition
s390/dasd: Fix whitespace
s390/dasd: Add dynamic formatting support for ESE volumes
s390/dasd: Recognise data for ESE volumes
s390/dasd: Put sub-order definitions in a separate section
s390/dasd: Make layout analysis ESE compatible
s390/dasd: Remove old defines and function
...
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Pull driver core and debugfs updates from Greg KH:
"Here is the "big" driver core and debugfs changes for 5.3-rc1
It's a lot of different patches, all across the tree due to some api
changes and lots of debugfs cleanups.
Other than the debugfs cleanups, in this set of changes we have:
- bus iteration function cleanups
- scripts/get_abi.pl tool to display and parse Documentation/ABI
entries in a simple way
- cleanups to Documenatation/ABI/ entries to make them parse easier
due to typos and other minor things
- default_attrs use for some ktype users
- driver model documentation file conversions to .rst
- compressed firmware file loading
- deferred probe fixes
All of these have been in linux-next for a while, with a bunch of
merge issues that Stephen has been patient with me for"
* tag 'driver-core-5.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (102 commits)
debugfs: make error message a bit more verbose
orangefs: fix build warning from debugfs cleanup patch
ubifs: fix build warning after debugfs cleanup patch
driver: core: Allow subsystems to continue deferring probe
drivers: base: cacheinfo: Ensure cpu hotplug work is done before Intel RDT
arch_topology: Remove error messages on out-of-memory conditions
lib: notifier-error-inject: no need to check return value of debugfs_create functions
swiotlb: no need to check return value of debugfs_create functions
ceph: no need to check return value of debugfs_create functions
sunrpc: no need to check return value of debugfs_create functions
ubifs: no need to check return value of debugfs_create functions
orangefs: no need to check return value of debugfs_create functions
nfsd: no need to check return value of debugfs_create functions
lib: 842: no need to check return value of debugfs_create functions
debugfs: provide pr_fmt() macro
debugfs: log errors when something goes wrong
drivers: s390/cio: Fix compilation warning about const qualifiers
drivers: Add generic helper to match by of_node
driver_find_device: Unify the match function with class_find_device()
bus_find_device: Unify the match callback with class_find_device
...
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The function ap_query_configuration is declared static and marked
EXPORT_SYMBOL, which is at best an odd combination. Because the
function is not used outside of the drivers/s390/crypto/ap_bus.c
file it is defined in, this commit removes the EXPORT_SYMBOL() marking.
Link: http://lkml.kernel.org/r/20190709122507.11158-1-efremov@linux.com
Fixes: f1b0a4343c41 ("s390/zcrypt: Integrate ap_asm.h into include/asm/ap.h.")
Fixes: 050349b5b71d ("s390/zcrypt: externalize AP config info query")
Signed-off-by: Denis Efremov <efremov@linux.com>
Reviewed-by: Harald Freudenberger <freude@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
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vfio_ap_free_aqic_resources is called in two places:
- during registration to have a "known state"
- during interrupt disable
We must not clear q->matrix_mdev in the registration phase as this will
mess up the reference counting and can lead to some warning and other
bugs.
Fixes: ec89b55e3bce ("s390: ap: implement PAPQ AQIC interception in kernel")
Reviewed-by: Halil Pasic <pasic@linux.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
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We register a AP PQAP instruction hook during the open
of the mediated device. And unregister it on release.
During the probe of the AP device, we allocate a vfio_ap_queue
structure to keep track of the information we need for the
PQAP/AQIC instruction interception.
In the AP PQAP instruction hook, if we receive a demand to
enable IRQs,
- we retrieve the vfio_ap_queue based on the APQN we receive
in REG1,
- we retrieve the page of the guest address, (NIB), from
register REG2
- we retrieve the mediated device to use the VFIO pinning
infrastructure to pin the page of the guest address,
- we retrieve the pointer to KVM to register the guest ISC
and retrieve the host ISC
- finaly we activate GISA
If we receive a demand to disable IRQs,
- we deactivate GISA
- unregister from the GIB
- unpin the NIB
When removing the AP device from the driver the device is
reseted and this process unregisters the GISA from the GIB,
and unpins the NIB address then we free the vfio_ap_queue
structure.
Signed-off-by: Pierre Morel <pmorel@linux.ibm.com>
Acked-by: Tony Krowiak <akrowiak@linux.ibm.com>
Acked-by: Harald Freudenberger <freude@linux.ibm.com>
Signed-off-by: Halil Pasic <pasic@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
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To be able to use the VFIO interface to facilitate the
mediated device memory pinning/unpinning we need to register
a notifier for IOMMU.
While we will start to pin one guest page for the interrupt indicator
byte, this is still ok with ballooning as this page will never be
used by the guest virtio-balloon driver.
So the pinned page will never be freed. And even a broken guest does
so, that would not impact the host as the original page is still
in control by vfio.
Signed-off-by: Pierre Morel <pmorel@linux.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Tony Krowiak <akrowiak@linux.ibm.com>
Acked-by: Harald Freudenberger <freude@linux.ibm.com>
Signed-off-by: Halil Pasic <pasic@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
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We prepare the interception of the PQAP/AQIC instruction for
the case the AQIC facility is enabled in the guest.
First of all we do not want to change existing behavior when
intercepting AP instructions without the SIE allowing the guest
to use AP instructions.
In this patch we only handle the AQIC interception allowed by
facility 65 which will be enabled when the complete interception
infrastructure will be present.
We add a callback inside the KVM arch structure for s390 for
a VFIO driver to handle a specific response to the PQAP
instruction with the AQIC command and only this command.
But we want to be able to return a correct answer to the guest
even there is no VFIO AP driver in the kernel.
Therefor, we inject the correct exceptions from inside KVM for the
case the callback is not initialized, which happens when the vfio_ap
driver is not loaded.
We do consider the responsibility of the driver to always initialize
the PQAP callback if it defines queues by initializing the CRYCB for
a guest.
If the callback has been setup we call it.
If not we setup an answer considering that no queue is available
for the guest when no callback has been setup.
Signed-off-by: Pierre Morel <pmorel@linux.ibm.com>
Reviewed-by: Tony Krowiak <akrowiak@linux.ibm.com>
Acked-by: Harald Freudenberger <freude@linux.ibm.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Halil Pasic <pasic@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
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There is an arbitrary difference between the prototypes of
bus_find_device() and class_find_device() preventing their callers
from passing the same pair of data and match() arguments to both of
them, which is the const qualifier used in the prototype of
class_find_device(). If that qualifier is also used in the
bus_find_device() prototype, it will be possible to pass the same
match() callback function to both bus_find_device() and
class_find_device(), which will allow some optimizations to be made in
order to avoid code duplication going forward. Also with that, constify
the "data" parameter as it is passed as a const to the match function.
For this reason, change the prototype of bus_find_device() to match
the prototype of class_find_device() and adjust its callers to use the
const qualifier in accordance with the new prototype of it.
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andrew Lunn <andrew@lunn.ch>
Cc: Andreas Noever <andreas.noever@gmail.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Corey Minyard <minyard@acm.org>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: David Kershner <david.kershner@unisys.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: David Airlie <airlied@linux.ie>
Cc: Felipe Balbi <balbi@kernel.org>
Cc: Frank Rowand <frowand.list@gmail.com>
Cc: Grygorii Strashko <grygorii.strashko@ti.com>
Cc: Harald Freudenberger <freude@linux.ibm.com>
Cc: Hartmut Knaack <knaack.h@gmx.de>
Cc: Heiko Stuebner <heiko@sntech.de>
Cc: Jason Gunthorpe <jgg@ziepe.ca>
Cc: Jonathan Cameron <jic23@kernel.org>
Cc: "James E.J. Bottomley" <jejb@linux.ibm.com>
Cc: Len Brown <lenb@kernel.org>
Cc: Mark Brown <broonie@kernel.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Michael Jamet <michael.jamet@intel.com>
Cc: "Martin K. Petersen" <martin.petersen@oracle.com>
Cc: Peter Oberparleiter <oberpar@linux.ibm.com>
Cc: Sebastian Ott <sebott@linux.ibm.com>
Cc: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Cc: Yehezkel Bernat <YehezkelShB@gmail.com>
Cc: rafael@kernel.org
Acked-by: Corey Minyard <minyard@acm.org>
Acked-by: David Kershner <david.kershner@unisys.com>
Acked-by: Mark Brown <broonie@kernel.org>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Acked-by: Wolfram Sang <wsa@the-dreams.de> # for the I2C parts
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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systemd-modules-load.service automatically tries to load the pkey module
on systems that have MSA.
Pkey also requires the MSA3 facility and a bunch of subfunctions.
Failing with -EOPNOTSUPP makes "systemd-modules-load.service" fail on
any system that does not have all needed subfunctions. For example,
when running under QEMU TCG (but also on systems where protected keys
are disabled via the HMC).
Let's use -ENODEV, so systemd-modules-load.service properly ignores
failing to load the pkey module because of missing HW functionality.
While at it, also convert the -EOPNOTSUPP in pkey_clr2protkey() to -ENODEV.
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Harald Freudenberger <freude@linux.ibm.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
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Within an EP11 cprb there exists a byte field flags. Bit 0x20
of this field indicates a special cprb. A special cprb triggers
special handling in the firmware below the OS layer.
However, a special cprb also needs to have the S bit in GPR0
set when NQAP is called. This was not the case for EP11 cprbs
and this patch now introduces the code to support this.
Signed-off-by: Harald Freudenberger <freude@linux.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
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The zcrypt device driver does not handle CPRBs which address
a control domain correctly. This fix introduces a workaround:
The domain field of the request CPRB is checked if there is
a valid domain value in there. If this is true and the value
is a control only domain (a domain which is enabled in the
crypto config ADM mask but disabled in the AQM mask) the
CPRB is forwarded to the default usage domain. If there is
no default domain, the request is rejected with an ENODEV.
This fix is important for maintaining crypto adapters. For
example one LPAR can use a crypto adapter domain ('Control
and Usage') but another LPAR needs to be able to maintain
this adapter domain ('Control'). Scenarios like this did
not work properly and the patch enables this.
Signed-off-by: Harald Freudenberger <freude@linux.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
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Pull stream_open conversion from Kirill Smelkov:
- remove unnecessary double nonseekable_open from drivers/char/dtlk.c
as noticed by Pavel Machek while reviewing nonseekable_open ->
stream_open mass conversion.
- the mass conversion patch promised in commit 10dce8af3422 ("fs:
stream_open - opener for stream-like files so that read and write can
run simultaneously without deadlock") and is automatically generated
by running
$ make coccicheck MODE=patch COCCI=scripts/coccinelle/api/stream_open.cocci
I've verified each generated change manually - that it is correct to
convert - and each other nonseekable_open instance left - that it is
either not correct to convert there, or that it is not converted due
to current stream_open.cocci limitations. More details on this in the
patch.
- finally, change VFS to pass ppos=NULL into .read/.write for files
that declare themselves streams. It was suggested by Rasmus Villemoes
and makes sure that if ppos starts to be erroneously used in a stream
file, such bug won't go unnoticed and will produce an oops instead of
creating illusion of position change being taken into account.
Note: this patch does not conflict with "fuse: Add FOPEN_STREAM to
use stream_open()" that will be hopefully coming via FUSE tree,
because fs/fuse/ uses new-style .read_iter/.write_iter, and for these
accessors position is still passed as non-pointer kiocb.ki_pos .
* tag 'stream_open-5.2' of https://lab.nexedi.com/kirr/linux:
vfs: pass ppos=NULL to .read()/.write() of FMODE_STREAM files
*: convert stream-like files from nonseekable_open -> stream_open
dtlk: remove double call to nonseekable_open
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Pull s390 updates from Martin Schwidefsky:
- Support for kernel address space layout randomization
- Add support for kernel image signature verification
- Convert s390 to the generic get_user_pages_fast code
- Convert s390 to the stack unwind API analog to x86
- Add support for CPU directed interrupts for PCI devices
- Provide support for MIO instructions to the PCI base layer, this will
allow the use of direct PCI mappings in user space code
- Add the basic KVM guest ultravisor interface for protected VMs
- Add AT_HWCAP bits for several new hardware capabilities
- Update the CPU measurement facility counter definitions to SVN 6
- Arnds cleanup patches for his quest to get LLVM compiles working
- A vfio-ccw update with bug fixes and support for halt and clear
- Improvements for the hardware TRNG code
- Another round of cleanup for the QDIO layer
- Numerous cleanups and bug fixes
* tag 's390-5.2-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (98 commits)
s390/vdso: drop unnecessary cc-ldoption
s390: fix clang -Wpointer-sign warnigns in boot code
s390: drop CONFIG_VIRT_TO_BUS
s390: boot, purgatory: pass $(CLANG_FLAGS) where needed
s390: only build for new CPUs with clang
s390: simplify disabled_wait
s390/ftrace: use HAVE_FUNCTION_GRAPH_RET_ADDR_PTR
s390/unwind: introduce stack unwind API
s390/opcodes: add missing instructions to the disassembler
s390/bug: add entry size to the __bug_table section
s390: use proper expoline sections for .dma code
s390/nospec: rename assembler generated expoline thunks
s390: add missing ENDPROC statements to assembler functions
locking/lockdep: check for freed initmem in static_obj()
s390/kernel: add support for kernel address space layout randomization (KASLR)
s390/kernel: introduce .dma sections
s390/sclp: do not use static sccbs
s390/kprobes: use static buffer for insn_page
s390/kernel: convert SYSCALL and PGM_CHECK handlers to .quad
s390/kernel: build a relocatable kernel
...
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Using scripts/coccinelle/api/stream_open.cocci added in 10dce8af3422
("fs: stream_open - opener for stream-like files so that read and write
can run simultaneously without deadlock"), search and convert to
stream_open all in-kernel nonseekable_open users for which read and
write actually do not depend on ppos and where there is no other methods
in file_operations which assume @offset access.
I've verified each generated change manually - that it is correct to convert -
and each other nonseekable_open instance left - that it is either not correct
to convert there, or that it is not converted due to current stream_open.cocci
limitations. The script also does not convert files that should be valid to
convert, but that currently have .llseek = noop_llseek or generic_file_llseek
for unknown reason despite file being opened with nonseekable_open (e.g.
drivers/input/mousedev.c)
Among cases converted 14 were potentially vulnerable to read vs write deadlock
(see details in 10dce8af3422):
drivers/char/pcmcia/cm4000_cs.c:1685:7-23: ERROR: cm4000_fops: .read() can deadlock .write(); change nonseekable_open -> stream_open to fix.
drivers/gnss/core.c:45:1-17: ERROR: gnss_fops: .read() can deadlock .write(); change nonseekable_open -> stream_open to fix.
drivers/hid/uhid.c:635:1-17: ERROR: uhid_fops: .read() can deadlock .write(); change nonseekable_open -> stream_open to fix.
drivers/infiniband/core/user_mad.c:988:1-17: ERROR: umad_fops: .read() can deadlock .write(); change nonseekable_open -> stream_open to fix.
drivers/input/evdev.c:527:1-17: ERROR: evdev_fops: .read() can deadlock .write(); change nonseekable_open -> stream_open to fix.
drivers/input/misc/uinput.c:401:1-17: ERROR: uinput_fops: .read() can deadlock .write(); change nonseekable_open -> stream_open to fix.
drivers/isdn/capi/capi.c:963:8-24: ERROR: capi_fops: .read() can deadlock .write(); change nonseekable_open -> stream_open to fix.
drivers/leds/uleds.c:77:1-17: ERROR: uleds_fops: .read() can deadlock .write(); change nonseekable_open -> stream_open to fix.
drivers/media/rc/lirc_dev.c:198:1-17: ERROR: lirc_fops: .read() can deadlock .write(); change nonseekable_open -> stream_open to fix.
drivers/s390/char/fs3270.c:488:1-17: ERROR: fs3270_fops: .read() can deadlock .write(); change nonseekable_open -> stream_open to fix.
drivers/usb/misc/ldusb.c:310:1-17: ERROR: ld_usb_fops: .read() can deadlock .write(); change nonseekable_open -> stream_open to fix.
drivers/xen/evtchn.c:667:8-24: ERROR: evtchn_fops: .read() can deadlock .write(); change nonseekable_open -> stream_open to fix.
net/batman-adv/icmp_socket.c:80:1-17: ERROR: batadv_fops: .read() can deadlock .write(); change nonseekable_open -> stream_open to fix.
net/rfkill/core.c:1146:8-24: ERROR: rfkill_fops: .read() can deadlock .write(); change nonseekable_open -> stream_open to fix.
and the rest were just safe to convert to stream_open because their read and
write do not use ppos at all and corresponding file_operations do not
have methods that assume @offset file access(*):
arch/powerpc/platforms/52xx/mpc52xx_gpt.c:631:8-24: WARNING: mpc52xx_wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
arch/powerpc/platforms/cell/spufs/file.c:591:8-24: WARNING: spufs_ibox_fops: .read() has stream semantic; safe to change nonseekable_open -> stream_open.
arch/powerpc/platforms/cell/spufs/file.c:591:8-24: WARNING: spufs_ibox_stat_fops: .read() has stream semantic; safe to change nonseekable_open -> stream_open.
arch/powerpc/platforms/cell/spufs/file.c:591:8-24: WARNING: spufs_mbox_fops: .read() has stream semantic; safe to change nonseekable_open -> stream_open.
arch/powerpc/platforms/cell/spufs/file.c:591:8-24: WARNING: spufs_mbox_stat_fops: .read() has stream semantic; safe to change nonseekable_open -> stream_open.
arch/powerpc/platforms/cell/spufs/file.c:591:8-24: WARNING: spufs_wbox_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
arch/powerpc/platforms/cell/spufs/file.c:591:8-24: WARNING: spufs_wbox_stat_fops: .read() has stream semantic; safe to change nonseekable_open -> stream_open.
arch/um/drivers/harddog_kern.c:88:8-24: WARNING: harddog_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
arch/x86/kernel/cpu/microcode/core.c:430:33-49: WARNING: microcode_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/char/ds1620.c:215:8-24: WARNING: ds1620_fops: .read() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/char/dtlk.c:301:1-17: WARNING: dtlk_fops: .read() and .write() have stream semantic; safe to change nonseekable_open -> stream_open.
drivers/char/ipmi/ipmi_watchdog.c:840:9-25: WARNING: ipmi_wdog_fops: .read() and .write() have stream semantic; safe to change nonseekable_open -> stream_open.
drivers/char/pcmcia/scr24x_cs.c:95:8-24: WARNING: scr24x_fops: .read() and .write() have stream semantic; safe to change nonseekable_open -> stream_open.
drivers/char/tb0219.c:246:9-25: WARNING: tb0219_fops: .read() and .write() have stream semantic; safe to change nonseekable_open -> stream_open.
drivers/firewire/nosy.c:306:8-24: WARNING: nosy_ops: .read() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/hwmon/fschmd.c:840:8-24: WARNING: watchdog_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/hwmon/w83793.c:1344:8-24: WARNING: watchdog_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/infiniband/core/ucma.c:1747:8-24: WARNING: ucma_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/infiniband/core/ucm.c:1178:8-24: WARNING: ucm_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/infiniband/core/uverbs_main.c:1086:8-24: WARNING: uverbs_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/input/joydev.c:282:1-17: WARNING: joydev_fops: .read() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/pci/switch/switchtec.c:393:1-17: WARNING: switchtec_fops: .read() and .write() have stream semantic; safe to change nonseekable_open -> stream_open.
drivers/platform/chrome/cros_ec_debugfs.c:135:8-24: WARNING: cros_ec_console_log_fops: .read() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/rtc/rtc-ds1374.c:470:9-25: WARNING: ds1374_wdt_fops: .read() and .write() have stream semantic; safe to change nonseekable_open -> stream_open.
drivers/rtc/rtc-m41t80.c:805:9-25: WARNING: wdt_fops: .read() and .write() have stream semantic; safe to change nonseekable_open -> stream_open.
drivers/s390/char/tape_char.c:293:2-18: WARNING: tape_fops: .read() and .write() have stream semantic; safe to change nonseekable_open -> stream_open.
drivers/s390/char/zcore.c:194:8-24: WARNING: zcore_reipl_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/s390/crypto/zcrypt_api.c:528:8-24: WARNING: zcrypt_fops: .read() and .write() have stream semantic; safe to change nonseekable_open -> stream_open.
drivers/spi/spidev.c:594:1-17: WARNING: spidev_fops: .read() and .write() have stream semantic; safe to change nonseekable_open -> stream_open.
drivers/staging/pi433/pi433_if.c:974:1-17: WARNING: pi433_fops: .read() and .write() have stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/acquirewdt.c:203:8-24: WARNING: acq_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/advantechwdt.c:202:8-24: WARNING: advwdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/alim1535_wdt.c:252:8-24: WARNING: ali_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/alim7101_wdt.c:217:8-24: WARNING: wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/ar7_wdt.c:166:8-24: WARNING: ar7_wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/at91rm9200_wdt.c:113:8-24: WARNING: at91wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/ath79_wdt.c:135:8-24: WARNING: ath79_wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/bcm63xx_wdt.c:119:8-24: WARNING: bcm63xx_wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/cpu5wdt.c:143:8-24: WARNING: cpu5wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/cpwd.c:397:8-24: WARNING: cpwd_fops: .read() and .write() have stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/eurotechwdt.c:319:8-24: WARNING: eurwdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/f71808e_wdt.c:528:8-24: WARNING: watchdog_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/gef_wdt.c:232:8-24: WARNING: gef_wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/geodewdt.c:95:8-24: WARNING: geodewdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/ib700wdt.c:241:8-24: WARNING: ibwdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/ibmasr.c:326:8-24: WARNING: asr_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/indydog.c:80:8-24: WARNING: indydog_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/intel_scu_watchdog.c:307:8-24: WARNING: intel_scu_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/iop_wdt.c:104:8-24: WARNING: iop_wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/it8712f_wdt.c:330:8-24: WARNING: it8712f_wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/ixp4xx_wdt.c:68:8-24: WARNING: ixp4xx_wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/ks8695_wdt.c:145:8-24: WARNING: ks8695wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/m54xx_wdt.c:88:8-24: WARNING: m54xx_wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/machzwd.c:336:8-24: WARNING: zf_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/mixcomwd.c:153:8-24: WARNING: mixcomwd_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/mtx-1_wdt.c:121:8-24: WARNING: mtx1_wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/mv64x60_wdt.c:136:8-24: WARNING: mv64x60_wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/nuc900_wdt.c:134:8-24: WARNING: nuc900wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/nv_tco.c:164:8-24: WARNING: nv_tco_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/pc87413_wdt.c:289:8-24: WARNING: pc87413_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/pcwd.c:698:8-24: WARNING: pcwd_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/pcwd.c:737:8-24: WARNING: pcwd_temp_fops: .read() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/pcwd_pci.c:581:8-24: WARNING: pcipcwd_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/pcwd_pci.c:623:8-24: WARNING: pcipcwd_temp_fops: .read() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/pcwd_usb.c:488:8-24: WARNING: usb_pcwd_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/pcwd_usb.c:527:8-24: WARNING: usb_pcwd_temperature_fops: .read() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/pika_wdt.c:121:8-24: WARNING: pikawdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/pnx833x_wdt.c:119:8-24: WARNING: pnx833x_wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/rc32434_wdt.c:153:8-24: WARNING: rc32434_wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/rdc321x_wdt.c:145:8-24: WARNING: rdc321x_wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/riowd.c:79:1-17: WARNING: riowd_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/sa1100_wdt.c:62:8-24: WARNING: sa1100dog_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/sbc60xxwdt.c:211:8-24: WARNING: wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/sbc7240_wdt.c:139:8-24: WARNING: wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/sbc8360.c:274:8-24: WARNING: sbc8360_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/sbc_epx_c3.c:81:8-24: WARNING: epx_c3_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/sbc_fitpc2_wdt.c:78:8-24: WARNING: fitpc2_wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/sb_wdog.c:108:1-17: WARNING: sbwdog_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/sc1200wdt.c:181:8-24: WARNING: sc1200wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/sc520_wdt.c:261:8-24: WARNING: wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/sch311x_wdt.c:319:8-24: WARNING: sch311x_wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/scx200_wdt.c:105:8-24: WARNING: scx200_wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/smsc37b787_wdt.c:369:8-24: WARNING: wb_smsc_wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/w83877f_wdt.c:227:8-24: WARNING: wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/w83977f_wdt.c:301:8-24: WARNING: wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/wafer5823wdt.c:200:8-24: WARNING: wafwdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/watchdog_dev.c:828:8-24: WARNING: watchdog_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/wdrtas.c:379:8-24: WARNING: wdrtas_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/wdrtas.c:445:8-24: WARNING: wdrtas_temp_fops: .read() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/wdt285.c:104:1-17: WARNING: watchdog_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/wdt977.c:276:8-24: WARNING: wdt977_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/wdt.c:424:8-24: WARNING: wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/wdt.c:484:8-24: WARNING: wdt_temp_fops: .read() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/wdt_pci.c:464:8-24: WARNING: wdtpci_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/wdt_pci.c:527:8-24: WARNING: wdtpci_temp_fops: .read() has stream semantic; safe to change nonseekable_open -> stream_open.
net/batman-adv/log.c:105:1-17: WARNING: batadv_log_fops: .read() has stream semantic; safe to change nonseekable_open -> stream_open.
sound/core/control.c:57:7-23: WARNING: snd_ctl_f_ops: .read() has stream semantic; safe to change nonseekable_open -> stream_open.
sound/core/rawmidi.c:385:7-23: WARNING: snd_rawmidi_f_ops: .read() and .write() have stream semantic; safe to change nonseekable_open -> stream_open.
sound/core/seq/seq_clientmgr.c:310:7-23: WARNING: snd_seq_f_ops: .read() and .write() have stream semantic; safe to change nonseekable_open -> stream_open.
sound/core/timer.c:1428:7-23: WARNING: snd_timer_f_ops: .read() has stream semantic; safe to change nonseekable_open -> stream_open.
One can also recheck/review the patch via generating it with explanation comments included via
$ make coccicheck MODE=patch COCCI=scripts/coccinelle/api/stream_open.cocci SPFLAGS="-D explain"
(*) This second group also contains cases with read/write deadlocks that
stream_open.cocci don't yet detect, but which are still valid to convert to
stream_open since ppos is not used. For example drivers/pci/switch/switchtec.c
calls wait_for_completion_interruptible() in its .read, but stream_open.cocci
currently detects only "wait_event*" as blocking.
Cc: Michael Kerrisk <mtk.manpages@gmail.com>
Cc: Yongzhi Pan <panyongzhi@gmail.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: David Vrabel <david.vrabel@citrix.com>
Cc: Juergen Gross <jgross@suse.com>
Cc: Miklos Szeredi <miklos@szeredi.hu>
Cc: Tejun Heo <tj@kernel.org>
Cc: Kirill Tkhai <ktkhai@virtuozzo.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Julia Lawall <Julia.Lawall@lip6.fr>
Cc: Nikolaus Rath <Nikolaus@rath.org>
Cc: Han-Wen Nienhuys <hanwen@google.com>
Cc: Anatolij Gustschin <agust@denx.de>
Cc: Jeff Dike <jdike@addtoit.com>
Cc: Richard Weinberger <richard@nod.at>
Cc: Anton Ivanov <anton.ivanov@cambridgegreys.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "James R. Van Zandt" <jrv@vanzandt.mv.com>
Cc: Corey Minyard <minyard@acm.org>
Cc: Harald Welte <laforge@gnumonks.org>
Acked-by: Lubomir Rintel <lkundrak@v3.sk> [scr24x_cs]
Cc: Stefan Richter <stefanr@s5r6.in-berlin.de>
Cc: Johan Hovold <johan@kernel.org>
Cc: David Herrmann <dh.herrmann@googlemail.com>
Cc: Jiri Kosina <jikos@kernel.org>
Cc: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Cc: Jean Delvare <jdelvare@suse.com>
Acked-by: Guenter Roeck <linux@roeck-us.net> [watchdog/* hwmon/*]
Cc: Rudolf Marek <r.marek@assembler.cz>
Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc: Karsten Keil <isdn@linux-pingi.de>
Cc: Jacek Anaszewski <jacek.anaszewski@gmail.com>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
Cc: Kurt Schwemmer <kurt.schwemmer@microsemi.com>
Acked-by: Logan Gunthorpe <logang@deltatee.com> [drivers/pci/switch/switchtec]
Acked-by: Bjorn Helgaas <bhelgaas@google.com> [drivers/pci/switch/switchtec]
Cc: Benson Leung <bleung@chromium.org>
Acked-by: Enric Balletbo i Serra <enric.balletbo@collabora.com> [platform/chrome]
Cc: Alessandro Zummo <a.zummo@towertech.it>
Acked-by: Alexandre Belloni <alexandre.belloni@bootlin.com> [rtc/*]
Cc: Mark Brown <broonie@kernel.org>
Cc: Wim Van Sebroeck <wim@linux-watchdog.org>
Cc: Florian Fainelli <f.fainelli@gmail.com>
Cc: bcm-kernel-feedback-list@broadcom.com
Cc: Wan ZongShun <mcuos.com@gmail.com>
Cc: Zwane Mwaikambo <zwanem@gmail.com>
Cc: Marek Lindner <mareklindner@neomailbox.ch>
Cc: Simon Wunderlich <sw@simonwunderlich.de>
Cc: Antonio Quartulli <a@unstable.cc>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Johannes Berg <johannes@sipsolutions.net>
Cc: Jaroslav Kysela <perex@perex.cz>
Cc: Takashi Iwai <tiwai@suse.com>
Signed-off-by: Kirill Smelkov <kirr@nexedi.com>
|
|
Add an extra parameter for airq handlers to recognize
floating vs. directed interrupts.
Signed-off-by: Sebastian Ott <sebott@linux.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
|
|
The debug feature entries have been used with up to 5 arguents
(including the pointer to the format string) but there was only
space reserved for 4 arguemnts. So now the registration does
reserve space for 5 times a long value.
This fixes a sometime appearing weired value as the last
value of an debug feature entry like this:
... pkey_sec2protkey zcrypt_send_cprb (cardnr=10 domain=12)
failed with errno -2143346254
Signed-off-by: Harald Freudenberger <freude@linux.ibm.com>
Reported-by: Christian Rund <Christian.Rund@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
|
|
The 'func_code' variable gets printed in debug statements without
a prior initialization in multiple functions, as reported when building
with clang:
drivers/s390/crypto/zcrypt_api.c:659:6: warning: variable 'func_code' is used uninitialized whenever 'if' condition is true
[-Wsometimes-uninitialized]
if (mex->outputdatalength < mex->inputdatalength) {
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/s390/crypto/zcrypt_api.c:725:29: note: uninitialized use occurs here
trace_s390_zcrypt_rep(mex, func_code, rc,
^~~~~~~~~
drivers/s390/crypto/zcrypt_api.c:659:2: note: remove the 'if' if its condition is always false
if (mex->outputdatalength < mex->inputdatalength) {
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/s390/crypto/zcrypt_api.c:654:24: note: initialize the variable 'func_code' to silence this warning
unsigned int func_code;
^
Add initializations to all affected code paths to shut up the warning
and make the warning output consistent.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
|
|
With commit 01396a374c3d ("s390/zcrypt: revisit ap device remove
procedure") the ap queue remove is now a two stage process. However,
a del_timer_sync() call may trigger the timer function which may
try to lock the very same spinlock as is held by the function
just initiating the del_timer_sync() call. This could end up in
a deadlock situation. Very unlikely but possible as you need to
remove an ap queue at the exact sime time when a timeout of a
request occurs.
Signed-off-by: Harald Freudenberger <freude@linux.ibm.com>
Reported-by: Pierre Morel <pmorel@linux.ibm.com>
Fixes: commit 01396a374c3d ("s390/zcrypt: revisit ap device remove procedure")
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
|
|
The current AP bus implementation periodically polls the AP configuration
to detect changes. When the AP configuration is dynamically changed via the
SE or an SCLP instruction, the changes will not be reflected to sysfs until
the next time the AP configuration is polled. The CHSC architecture
provides a Store Event Information (SEI) command to make notification of an
AP configuration change. This patch introduces a handler to process
notification from the CHSC SEI command by immediately kicking off an AP bus
scan-after-event.
Signed-off-by: Tony Krowiak <akrowiak@linux.ibm.com>
Reviewed-by: Halil Pasic <pasic@linux.ibm.com>
Reviewed-by: Sebastian Ott <sebott@linux.ibm.com>
Reviewed-by: Harald Freudenberger <FREUDE@de.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Sebastian Ott <sebott@linux.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
|
|
Working with the vfio-ap driver let to some revisit of the way
how an ap (queue) device is removed from the driver.
With the current implementation all the cleanup was done before
the driver even got notified about the removal. Now the ap
queue removal is done in 3 steps:
1) A preparation step, all ap messages within the queue
are flushed and so the driver does 'receive' them.
Also a new state AP_STATE_REMOVE assigned to the queue
makes sure there are no new messages queued in.
2) Now the driver's remove function is invoked and the
driver should do the job of cleaning up it's internal
administration lists or whatever. After 2) is done
it is guaranteed, that the driver is not invoked any
more. On the other hand the driver has to make sure
that the APQN is not accessed any more after step 2
is complete.
3) Now the ap bus code does the job of total cleanup of the
APQN. A reset with zero is triggered and the state of
the queue goes to AP_STATE_UNBOUND.
After step 3) is complete, the ap queue has no pending
messages and the APQN is cleared and so there are no
requests and replies lingering around in the firmware
queue for this APQN. Also the interrupts are disabled.
After these remove steps the ap queue device may be assigned
to another driver.
Stress testing this remove/probe procedure showed a problem with the
correct module reference counting. The actual receive of an reply in
the driver is done asynchronous with completions. So with a driver
change on an ap queue the message flush triggers completions but the
threads waiting for the completions may run at a time where the queue
already has the new driver assigned. So the module_put() at receive
time needs to be done on the driver module which queued the ap
message. This change is also part of this patch.
Signed-off-by: Harald Freudenberger <freude@linux.ibm.com>
Reviewed-by: Ingo Franzki <ifranzki@linux.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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Pull s390 updates from Martin Schwidefsky:
- A copy of Arnds compat wrapper generation series
- Pass information about the KVM guest to the host in form the control
program code and the control program version code
- Map IOV resources to support PCI physical functions on s390
- Add vector load and store alignment hints to improve performance
- Use the "jdd" constraint with gcc 9 to make jump labels working again
- Remove amode workaround for old z/VM releases from the DCSS code
- Add support for in-kernel performance measurements using the CPU
measurement counter facility
- Introduce a new PMU device cpum_cf_diag to capture counters and store
thenn as event raw data.
- Bug fixes and cleanups
* tag 's390-5.1-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (54 commits)
Revert "s390/cpum_cf: Add kernel message exaplanations"
s390/dasd: fix read device characteristic with CONFIG_VMAP_STACK=y
s390/suspend: fix prefix register reset in swsusp_arch_resume
s390: warn about clearing als implied facilities
s390: allow overriding facilities via command line
s390: clean up redundant facilities list setup
s390/als: remove duplicated in-place implementation of stfle
s390/cio: Use cpa range elsewhere within vfio-ccw
s390/cio: Fix vfio-ccw handling of recursive TICs
s390: vfio_ap: link the vfio_ap devices to the vfio_ap bus subsystem
s390/cpum_cf: Handle EBUSY return code from CPU counter facility reservation
s390/cpum_cf: Add kernel message exaplanations
s390/cpum_cf_diag: Add support for s390 counter facility diagnostic trace
s390/cpum_cf: add ctr_stcctm() function
s390/cpum_cf: move common functions into a separate file
s390/cpum_cf: introduce kernel_cpumcf_avail() function
s390/cpu_mf: replace stcctm5() with the stcctm() function
s390/cpu_mf: add store cpu counter multiple instruction support
s390/cpum_cf: Add minimal in-kernel interface for counter measurements
s390/cpum_cf: introduce kernel_cpumcf_alert() to obtain measurement alerts
...
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Libudev relies on having a subsystem link for non-root devices. To
avoid libudev (and potentially other userspace tools) choking on the
matrix device let us introduce a matrix bus and with it the matrix
bus subsytem. Also make the matrix device reside within the matrix
bus.
Doing this we remove the forced link from the matrix device to the
vfio_ap driver and the device_type we do not need anymore.
Since the associated matrix driver is not the vfio_ap driver any more,
we have to change the search for the devices on the vfio_ap driver in
the function vfio_ap_verify_queue_reserved.
Fixes: 1fde573413b5 ("s390: vfio-ap: base implementation of VFIO AP device driver")
Cc: stable@vger.kernel.org
Reported-by: Marc Hartmayer <mhartmay@linux.ibm.com>
Reported-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Pierre Morel <pmorel@linux.ibm.com>
Tested-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Tony Krowiak <akrowiak@linux.ibm.com>
Acked-by: Halil Pasic <pasic@linux.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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When the CCA master key is set twice with the same master key,
then the old and the current master key are the same and thus the
verification patterns are the same, too. The check to report if a
secure key is currently wrapped by the old master key erroneously
reports old mkvp in this case.
Reviewed-by: Harald Freudenberger <freude@linux.ibm.com>
Signed-off-by: Ingo Franzki <ifranzki@linux.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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When an alternate driver (vfio-ap) has bound an ap queue and this
binding is revised the ap queue device is in an intermittent
state not bound to any driver. The internal state variable
covered this with the state AP_STATE_BORKED which is also used to
reflect broken devices. When now an ap bus scan runs such a
device is destroyed and on the next scan reconstructed.
So a stress test with high frequency switching the queue driver
between the default and the vfio-ap driver hit this gap and the
queue was removed until the next ap bus scan. This fix now
introduces another state for the in-between condition for a queue
momentary not bound to a driver and so the ap bus scan function
skips this device instead of removing it.
Also some very slight but maybe helpful debug feature messages
come with this patch - in particular a message showing that a
broken card/queue device will get removed.
Signed-off-by: Harald Freudenberger <freude@linux.ibm.com>
Reviewed-by: Ingo Franzki <ifranzki@linux.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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The older machines don't have the QCI instruction available.
With support for up to 256 crypto cards the probing of each
card has been extended to check card ids from 0 up to 255.
For machines with QCI support there is a filter limiting the
range of probed cards. The older machines (z196 and older)
don't have this filter and so since support for 256 cards is
in the driver all cards are probed. However, these machines
also require to have the card id fit into 6 bits. Exceeding
this limit results in a specification exception which happens
on every kernel startup even when there is no crypto configured
and used at all.
This fix limits the range of probed crypto cards to 64 if
there is no QCI instruction available to obey to the older
ap architecture and so fixes the specification exceptions
on z196 machines.
Cc: stable@vger.kernel.org # v4.17+
Fixes: af4a72276d49 ("s390/zcrypt: Support up to 256 crypto adapters.")
Signed-off-by: Harald Freudenberger <freude@linux.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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Rework of the AP bus scan code. The ap_scan_bus() function
is large, so this patch splits the code by introducing a new
new function _ap_scan_bus_adapter() which deals with just
one adapter and thus reduces the scan function code complexity.
Now the AP bus scan can handle a type change of an crypto
adapter on the fly (e.g. from CEX5 to CEX6). This may be
the case with newer versions of zVM where the card may
be pure virtual and a type change is just one click.
However a type or function change requires to unregister
all queue devices and the card device and re-register them.
Comments around the AP bus scan code have been added and/or
improved to provide some hopefully useful hints about what
the code is actually doing.
Signed-off-by: Harald Freudenberger <freude@linux.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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Until now there is no way to reset a AP queue or card. Driving a card
or queue offline and online again does only toggle the 'software'
online state. The only way to trigger a (hardware) reset is by running
hot-unplug/hot-plug for example on the HMC.
This patch makes the queue reset attribute in sysfs writable.
Writing into this attribute triggers a reset on the AP queue's state
machine. So the AP queue is flushed and state machine runs through the
initial states which cause a reset (PQAP(RAPQ)) and a re-registration
to interrupts (PQAP(AQIC)) if available.
The reset sysfs attribute is writable by root only. So only an
administrator is allowed to initiate a reset of AP queues. Please note
that the queue's counter values are left untouched by the reset.
Signed-off-by: Harald Freudenberger <freude@linux.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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There exist very few ap messages which need to have the 'special' flag
enabled. This flag tells the firmware layer to do some pre- and maybe
postprocessing. However, it may happen that this special flag is
enabled but the firmware is unable to deal with this kind of message
and thus returns with reply code 0x41. For example older firmware may
not know the newest messages triggered by the zcrypt device driver and
thus react with reject and the named reply code. Unfortunately this
reply code is not known to the zcrypt error routines and thus default
behavior is to switch the ap queue offline.
This patch now makes the ap error routine aware of the reply code and
so userspace is informed about the bad processing result but the queue
is not switched to offline state any more.
Signed-off-by: Harald Freudenberger <freude@linux.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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Harald Freudenberger
Linus Torvalds
Markus Elfring
Heiko Carstens
Johan Hovold
Ingo Franzki
Halil Pasic
Vasily Gorbik
Suzuki K Poulose
Denis Efremov
Christian Borntraeger
Pierre Morel
David Hildenbrand
Kirill Smelkov
Sebastian Ott
Arnd Bergmann
Tony Krowiak