This is the last implementation of iommu_table_ops::exchange() which
we are about to remove.
This implements xchg_no_kill() for pseries. Since it is paravirtual
platform, the hypervisor does TCE invalidations and we do not have
to deal with it here, hence no tce_kill() hook.
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20190829085252.72370-5-aik@ozlabs.ru
Invalidating a TCE cache entry for each updated TCE is quite expensive.
This makes use of the new iommu_table_ops::xchg_no_kill()/tce_kill()
callbacks to bring down the time spent in mapping a huge guest DMA window.
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20190829085252.72370-4-aik@ozlabs.ru
Invalidating a TCE cache entry for each updated TCE is quite expensive.
This makes use of the new iommu_table_ops::xchg_no_kill()/tce_kill()
callbacks to bring down the time spent in mapping a huge guest DMA window;
roughly 20s to 10s for each guest's 100GB of DMA space.
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Acked-by: Paul Mackerras <paulus@ozlabs.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20190829085252.72370-3-aik@ozlabs.ru
At the moment updates in a TCE table are made by iommu_table_ops::exchange
which update one TCE and invalidates an entry in the PHB/NPU TCE cache
via set of registers called "TCE Kill" (hence the naming).
Writing a TCE is a simple xchg() but invalidating the TCE cache is
a relatively expensive OPAL call. Mapping a 100GB guest with PCI+NPU
passed through devices takes about 20s.
Thankfully we can do better. Since such big mappings happen at the boot
time and when memory is plugged/onlined (i.e. not often), these requests
come in 512 pages so we call call OPAL 512 times less which brings 20s
from the above to less than 10s. Also, since TCE caches can be flushed
entirely, calling OPAL for 512 TCEs helps skiboot [1] to decide whether
to flush the entire cache or not.
This implements 2 new iommu_table_ops callbacks:
- xchg_no_kill() to update a single TCE with no TCE invalidation;
- tce_kill() to invalidate multiple TCEs.
This uses the same xchg_no_kill() callback for IODA1/2.
This implements 2 new wrappers on top of the new callbacks similar to
the existing iommu_tce_xchg().
This does not use the new callbacks yet, the next patches will;
so this should not cause any behavioral change.
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20190829085252.72370-2-aik@ozlabs.ru
H_PUT_TCE_INDIRECT handlers receive a page with up to 512 TCEs from
a guest. Although we verify correctness of TCEs before we do anything
with the existing tables, there is a small window when a check in
kvmppc_tce_validate might pass and right after that the guest alters
the page with TCEs which can cause early exit from the handler and
leave srcu_read_lock(&vcpu->kvm->srcu) (virtual mode) or lock_rmap(rmap)
(real mode) locked.
This fixes the bug by jumping to the common exit code with an appropriate
unlock.
Fixes: 121f80ba68 ("KVM: PPC: VFIO: Add in-kernel acceleration for VFIO")
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20190826045520.92153-1-aik@ozlabs.ru
Testing has revealed the existence of a race condition where a XIVE
interrupt being shut down can be in one of the XIVE interrupt queues
(of which there are up to 8 per CPU, one for each priority) at the
point where free_irq() is called. If this happens, can return an
interrupt number which has been shut down. This can lead to various
symptoms:
- irq_to_desc(irq) can be NULL. In this case, no end-of-interrupt
function gets called, resulting in the CPU's elevated interrupt
priority (numerically lowered CPPR) never gets reset. That then
means that the CPU stops processing interrupts, causing device
timeouts and other errors in various device drivers.
- The irq descriptor or related data structures can be in the process
of being freed as the interrupt code is using them. This typically
leads to crashes due to bad pointer dereferences.
This race is basically what commit 62e0468650 ("genirq: Add optional
hardware synchronization for shutdown", 2019-06-28) is intended to
fix, given a get_irqchip_state() method for the interrupt controller
being used. It works by polling the interrupt controller when an
interrupt is being freed until the controller says it is not pending.
With XIVE, the PQ bits of the interrupt source indicate the state of
the interrupt source, and in particular the P bit goes from 0 to 1 at
the point where the hardware writes an entry into the interrupt queue
that this interrupt is directed towards. Normally, the code will then
process the interrupt and do an end-of-interrupt (EOI) operation which
will reset PQ to 00 (assuming another interrupt hasn't been generated
in the meantime). However, there are situations where the code resets
P even though a queue entry exists (for example, by setting PQ to 01,
which disables the interrupt source), and also situations where the
code leaves P at 1 after removing the queue entry (for example, this
is done for escalation interrupts so they cannot fire again until
they are explicitly re-enabled).
The code already has a 'saved_p' flag for the interrupt source which
indicates that a queue entry exists, although it isn't maintained
consistently. This patch adds a 'stale_p' flag to indicate that
P has been left at 1 after processing a queue entry, and adds code
to set and clear saved_p and stale_p as necessary to maintain a
consistent indication of whether a queue entry may or may not exist.
With this, we can implement xive_get_irqchip_state() by looking at
stale_p, saved_p and the ESB PQ bits for the interrupt.
There is some additional code to handle escalation interrupts
properly; because they are enabled and disabled in KVM assembly code,
which does not have access to the xive_irq_data struct for the
escalation interrupt. Hence, stale_p may be incorrect when the
escalation interrupt is freed in kvmppc_xive_{,native_}cleanup_vcpu().
Fortunately, we can fix it up by looking at vcpu->arch.xive_esc_on,
with some careful attention to barriers in order to ensure the correct
result if xive_esc_irq() races with kvmppc_xive_cleanup_vcpu().
Finally, this adds code to make noise on the console (pr_crit and
WARN_ON(1)) if we find an interrupt queue entry for an interrupt
which does not have a descriptor. While this won't catch the race
reliably, if it does get triggered it will be an indication that
the race is occurring and needs to be debugged.
Fixes: 243e25112d ("powerpc/xive: Native exploitation of the XIVE interrupt controller")
Cc: stable@vger.kernel.org # v4.12+
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20190813100648.GE9567@blackberry
At present, when running a guest on POWER9 using HV KVM but not using
an in-kernel interrupt controller (XICS or XIVE), for example if QEMU
is run with the kernel_irqchip=off option, the guest entry code goes
ahead and tries to load the guest context into the XIVE hardware, even
though no context has been set up.
To fix this, we check that the "CAM word" is non-zero before pushing
it to the hardware. The CAM word is initialized to a non-zero value
in kvmppc_xive_connect_vcpu() and kvmppc_xive_native_connect_vcpu(),
and is now cleared in kvmppc_xive_{,native_}cleanup_vcpu.
Fixes: 5af5099385 ("KVM: PPC: Book3S HV: Native usage of the XIVE interrupt controller")
Cc: stable@vger.kernel.org # v4.12+
Reported-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20190813100100.GC9567@blackberry
Escalation interrupts are interrupts sent to the host by the XIVE
hardware when it has an interrupt to deliver to a guest VCPU but that
VCPU is not running anywhere in the system. Hence we disable the
escalation interrupt for the VCPU being run when we enter the guest
and re-enable it when the guest does an H_CEDE hypercall indicating
it is idle.
It is possible that an escalation interrupt gets generated just as we
are entering the guest. In that case the escalation interrupt may be
using a queue entry in one of the interrupt queues, and that queue
entry may not have been processed when the guest exits with an H_CEDE.
The existing entry code detects this situation and does not clear the
vcpu->arch.xive_esc_on flag as an indication that there is a pending
queue entry (if the queue entry gets processed, xive_esc_irq() will
clear the flag). There is a comment in the code saying that if the
flag is still set on H_CEDE, we have to abort the cede rather than
re-enabling the escalation interrupt, lest we end up with two
occurrences of the escalation interrupt in the interrupt queue.
However, the exit code doesn't do that; it aborts the cede in the sense
that vcpu->arch.ceded gets cleared, but it still enables the escalation
interrupt by setting the source's PQ bits to 00. Instead we need to
set the PQ bits to 10, indicating that an interrupt has been triggered.
We also need to avoid setting vcpu->arch.xive_esc_on in this case
(i.e. vcpu->arch.xive_esc_on seen to be set on H_CEDE) because
xive_esc_irq() will run at some point and clear it, and if we race with
that we may end up with an incorrect result (i.e. xive_esc_on set when
the escalation interrupt has just been handled).
It is extremely unlikely that having two queue entries would cause
observable problems; theoretically it could cause queue overflow, but
the CPU would have to have thousands of interrupts targetted to it for
that to be possible. However, this fix will also make it possible to
determine accurately whether there is an unhandled escalation
interrupt in the queue, which will be needed by the following patch.
Fixes: 9b9b13a6d1 ("KVM: PPC: Book3S HV: Keep XIVE escalation interrupt masked unless ceded")
Cc: stable@vger.kernel.org # v4.16+
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20190813100349.GD9567@blackberry
When a vCPU is brought done, the XIVE VP (Virtual Processor) is first
disabled and then the event notification queues are freed. When freeing
the queues, we check for possible escalation interrupts and free them
also.
But when a XIVE VP is disabled, the underlying XIVE ENDs also are
disabled in OPAL. When an END (Event Notification Descriptor) is
disabled, its ESB pages (ESn and ESe) are disabled and loads return all
1s. Which means that any access on the ESB page of the escalation
interrupt will return invalid values.
When an interrupt is freed, the shutdown handler computes a 'saved_p'
field from the value returned by a load in xive_do_source_set_mask().
This value is incorrect for escalation interrupts for the reason
described above.
This has no impact on Linux/KVM today because we don't make use of it
but we will introduce in future changes a xive_get_irqchip_state()
handler. This handler will use the 'saved_p' field to return the state
of an interrupt and 'saved_p' being incorrect, softlockup will occur.
Fix the vCPU cleanup sequence by first freeing the escalation interrupts
if any, then disable the XIVE VP and last free the queues.
Fixes: 90c73795af ("KVM: PPC: Book3S HV: Add a new KVM device for the XIVE native exploitation mode")
Fixes: 5af5099385 ("KVM: PPC: Book3S HV: Native usage of the XIVE interrupt controller")
Cc: stable@vger.kernel.org # v4.12+
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20190806172538.5087-1-clg@kaod.org
Pull structleak fix from Kees Cook:
"Disable gcc-based stack variable auto-init under KASAN (Arnd
Bergmann).
This fixes a bunch of build warnings under KASAN and the
gcc-plugin-based stack auto-initialization features (which are
arguably redundant, so better to let KASAN control this)"
* tag 'meminit-v5.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
structleak: disable STRUCTLEAK_BYREF in combination with KASAN_STACK
Pull char/misc driver fixes from Greg KH:
"Here are some small char and misc driver fixes for 5.3-rc2 to resolve
some reported issues.
Nothing major at all, some binder bugfixes for issues found, some new
mei device ids, firmware building warning fixes, habanalabs fixes, a
few other build fixes, and a MAINTAINERS update.
All of these have been in linux-next with no reported issues"
* tag 'char-misc-5.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
test_firmware: fix a memory leak bug
hpet: Fix division by zero in hpet_time_div()
eeprom: make older eeprom drivers select NVMEM_SYSFS
vmw_balloon: Remove Julien from the maintainers list
fpga-manager: altera-ps-spi: Fix build error
mei: me: add mule creek canyon (EHL) device ids
binder: prevent transactions to context manager from its own process.
binder: Set end of SG buffer area properly.
firmware: Fix missing inline
firmware: fix build errors in paged buffer handling code
habanalabs: don't reset device when getting VRHOT
habanalabs: use %pad for printing a dma_addr_t
Pull tty fixes from Greg KH:
"Here are two tty/vt fixes:
- delete the netx-serial driver as the arch has been removed, no need
to keep the serial driver for it around either.
- vt console_lock fix to resolve a reported noisy warning at runtime
Both of these have been in linux-next with no reported issues"
* tag 'tty-5.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
vt: Grab console_lock around con_is_bound in show_bind
tty: serial: netx: Delete driver
Pull SPDX fixes from Greg KH:
"Here are some small SPDX fixes for 5.3-rc2 for things that came in
during the 5.3-rc1 merge window that we previously missed.
Only three small patches here:
- two uapi patches to resolve some SPDX tags that were not correct
- fix an invalid SPDX tag in the iomap Makefile file
All have been properly reviewed on the public mailing lists"
* tag 'spdx-5.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/spdx:
iomap: fix Invalid License ID
treewide: remove SPDX "WITH Linux-syscall-note" from kernel-space headers again
treewide: add "WITH Linux-syscall-note" to SPDX tag of uapi headers
Pull USB fixes from Greg KH:
"Here are some small fixes for 5.3-rc2. All of these resolve some
reported issues, some more than others :)
Included in here is:
- xhci fix for an annoying issue with odd devices
- reversion of some usb251xb patches that should not have been merged
- usb pci quirk additions and fixups
- usb storage fix
- usb host controller error test fix
All of these have been in linux-next with no reported issues"
* tag 'usb-5.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
xhci: Fix crash if scatter gather is used with Immediate Data Transfer (IDT).
usb: usb251xb: Reallow swap-dx-lanes to apply to the upstream port
Revert "usb: usb251xb: Add US port lanes inversion property"
Revert "usb: usb251xb: Add US lanes inversion dts-bindings"
usb: wusbcore: fix unbalanced get/put cluster_id
usb/hcd: Fix a NULL vs IS_ERR() bug in usb_hcd_setup_local_mem()
usb-storage: Add a limitation for blk_queue_max_hw_sectors()
usb: pci-quirks: Minor cleanup for AMD PLL quirk
usb: pci-quirks: Correct AMD PLL quirk detection
Pull ARM SoC fixes from Olof Johansson:
"Here's the first batch of fixes for this release cycle.
Main diffstat here is the re-deletion of netx. I messed up and most
likely didn't remove the files from the index when I test-merged this
and saw conflicts, and from there on out 'git rerere' remembered the
mistake and I missed checking it. Here it's done again as expected.
Besides that:
- A defconfig refresh + enabling of new drivers for u8500
- i.MX fixlets for i2c/SAI/pinmux
- sleep.S build fix for Davinci
- Broadcom devicetree build/warning fix"
* tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc:
ARM: defconfig: u8500: Add new drivers
ARM: defconfig: u8500: Refresh defconfig
ARM: dts: bcm: bcm47094: add missing #cells for mdio-bus-mux
ARM: davinci: fix sleep.S build error on ARMv4
arm64: dts: imx8mq: fix SAI compatible
arm64: dts: imx8mm: Correct SAI3 RXC/TXFS pin's mux option #1
ARM: dts: imx6ul: fix clock frequency property name of I2C buses
ARM: Delete netx a second time
ARM: dts: imx7ulp: Fix usb-phy unit address format
Pull x86 fixes from Thomas Gleixner:
"A set of x86 fixes and functional updates:
- Prevent stale huge I/O TLB mappings on 32bit. A long standing bug
which got exposed by KPTI support for 32bit
- Prevent bogus access_ok() warnings in arch_stack_walk_user()
- Add display quirks for Lenovo devices which have height and width
swapped
- Add the missing CR2 fixup for 32 bit async pagefaults. Fallout of
the CR2 bug fix series.
- Unbreak handling of force enabled HPET by moving the 'is HPET
counting' check back to the original place.
- A more accurate check for running on a hypervisor platform in the
MDS mitigation code. Not perfect, but more accurate than the
previous one.
- Update a stale and confusing comment vs. IRQ stacks"
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/speculation/mds: Apply more accurate check on hypervisor platform
x86/hpet: Undo the early counter is counting check
x86/entry/32: Pass cr2 to do_async_page_fault()
x86/irq/64: Update stale comment
x86/sysfb_efi: Add quirks for some devices with swapped width and height
x86/stacktrace: Prevent access_ok() warnings in arch_stack_walk_user()
mm/vmalloc: Sync unmappings in __purge_vmap_area_lazy()
x86/mm: Sync also unmappings in vmalloc_sync_all()
x86/mm: Check for pfn instead of page in vmalloc_sync_one()
Pull scheduler fixes from Thomas Gleixner:
"Two fixes for the fair scheduling class:
- Prevent freeing memory which is accessible by concurrent readers
- Make the RCU annotations for numa groups consistent"
* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
sched/fair: Use RCU accessors consistently for ->numa_group
sched/fair: Don't free p->numa_faults with concurrent readers
Pull perf fixes from Thomas Gleixner:
"A pile of perf related fixes:
Kernel:
- Fix SLOTS PEBS event constraints for Icelake CPUs
- Add the missing mask bit to allow counting hardware generated
prefetches on L3 for Icelake CPUs
- Make the test for hypervisor platforms more accurate (as far as
possible)
- Handle PMUs correctly which override event->cpu
- Yet another missing fallthrough annotation
Tools:
perf.data:
- Fix loading of compressed data split across adjacent records
- Fix buffer size setting for processing CPU topology perf.data
header.
perf stat:
- Fix segfault for event group in repeat mode
- Always separate "stalled cycles per insn" line, it was being
appended to the "instructions" line.
perf script:
- Fix --max-blocks man page description.
- Improve man page description of metrics.
- Fix off by one in brstackinsn IPC computation.
perf probe:
- Avoid calling freeing routine multiple times for same pointer.
perf build:
- Do not use -Wshadow on gcc < 4.8, avoiding too strict warnings
treated as errors, breaking the build"
* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
perf/x86/intel: Mark expected switch fall-throughs
perf/core: Fix creating kernel counters for PMUs that override event->cpu
perf/x86: Apply more accurate check on hypervisor platform
perf/x86/intel: Fix invalid Bit 13 for Icelake MSR_OFFCORE_RSP_x register
perf/x86/intel: Fix SLOTS PEBS event constraint
perf build: Do not use -Wshadow on gcc < 4.8
perf probe: Avoid calling freeing routine multiple times for same pointer
perf probe: Set pev->nargs to zero after freeing pev->args entries
perf session: Fix loading of compressed data split across adjacent records
perf stat: Always separate stalled cycles per insn
perf stat: Fix segfault for event group in repeat mode
perf tools: Fix proper buffer size for feature processing
perf script: Fix off by one in brstackinsn IPC computation
perf script: Improve man page description of metrics
perf script: Fix --max-blocks man page description
Pull locking fixes from Thomas Gleixner:
"A set of locking fixes:
- Address the fallout of the rwsem rework. Missing ACQUIREs and a
sanity check to prevent a use-after-free
- Add missing checks for unitialized mutexes when mutex debugging is
enabled.
- Remove the bogus code in the generic SMP variant of
arch_futex_atomic_op_inuser()
- Fixup the #ifdeffery in lockdep to prevent compile warnings"
* 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
locking/mutex: Test for initialized mutex
locking/lockdep: Clean up #ifdef checks
locking/lockdep: Hide unused 'class' variable
locking/rwsem: Add ACQUIRE comments
tty/ldsem, locking/rwsem: Add missing ACQUIRE to read_failed sleep loop
lcoking/rwsem: Add missing ACQUIRE to read_slowpath sleep loop
locking/rwsem: Add missing ACQUIRE to read_slowpath exit when queue is empty
locking/rwsem: Don't call owner_on_cpu() on read-owner
futex: Cleanup generic SMP variant of arch_futex_atomic_op_inuser()
Pull objtool fix from Thomas Gleixner:
"A single robustness fix for objtool to handle unbalanced CLAC
invocations under all circumstances"
* 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
objtool: Improve UACCESS coverage
Pull Wimplicit-fallthrough enablement from Gustavo A. R. Silva:
"This marks switch cases where we are expecting to fall through, and
globally enables the -Wimplicit-fallthrough option in the main
Makefile.
Finally, some missing-break fixes that have been tagged for -stable:
- drm/amdkfd: Fix missing break in switch statement
- drm/amdgpu/gfx10: Fix missing break in switch statement
With these changes, we completely get rid of all the fall-through
warnings in the kernel"
* tag 'Wimplicit-fallthrough-5.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gustavoars/linux:
Makefile: Globally enable fall-through warning
drm/i915: Mark expected switch fall-throughs
drm/amd/display: Mark expected switch fall-throughs
drm/amdkfd/kfd_mqd_manager_v10: Avoid fall-through warning
drm/amdgpu/gfx10: Fix missing break in switch statement
drm/amdkfd: Fix missing break in switch statement
perf/x86/intel: Mark expected switch fall-throughs
mtd: onenand_base: Mark expected switch fall-through
afs: fsclient: Mark expected switch fall-throughs
afs: yfsclient: Mark expected switch fall-throughs
can: mark expected switch fall-throughs
firewire: mark expected switch fall-throughs
Pull s390 updates from Heiko Carstens:
- Add ABI to kernel image file which allows e.g. the file utility to
figure out the kernel version.
- Wire up clone3 system call.
- Add support for kasan bitops instrumentation.
- uapi header cleanup: use __u{16,32,64} instead of uint{16,32,64}_t.
- Provide proper ARCH_ZONE_DMA_BITS so the s390 DMA zone is correctly
defined with 2 GB instead of the default value of 1 MB.
- Farhan Ali leaves the group of vfio-ccw maintainers.
- Various small vfio-ccw fixes.
- Add missing locking for airq_areas array in virtio code.
- Minor qdio improvements.
* tag 's390-5.3-3' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
MAINTAINERS: vfio-ccw: Remove myself as the maintainer
s390/mm: use shared variables for sysctl range check
virtio/s390: fix race on airq_areas[]
s390/dma: provide proper ARCH_ZONE_DMA_BITS value
s390/kasan: add bitops instrumentation
s390/bitops: make test functions return bool
s390: wire up clone3 system call
kbuild: enable arch/s390/include/uapi/asm/zcrypt.h for uapi header test
s390: use __u{16,32,64} instead of uint{16,32,64}_t in uapi header
s390/hypfs: fix a typo in the name of a function
s390/qdio: restrict QAOB usage to IQD unicast queues
s390/qdio: add sanity checks to the fast-requeue path
s390: enable detection of kernel version from bzImage
Documentation: fix vfio-ccw doc
vfio-ccw: Update documentation for csch/hsch
vfio-ccw: Don't call cp_free if we are processing a channel program
vfio-ccw: Set pa_nr to 0 if memory allocation fails for pa_iova_pfn
vfio-ccw: Fix memory leak and don't call cp_free in cp_init
vfio-ccw: Fix misleading comment when setting orb.cmd.c64
Pull Devicetree fixes from Rob Herring:
"The nvmem changes would typically go thru Greg's tree, but they were
missed in the merge window. [ Acked by Greg ]
Summary:
- Fix mismatches in $id values and actual filenames. Now checked by
tools.
- Convert nvmem binding to DT schema
- Fix a typo in of_property_read_bool() kerneldoc
- Remove some redundant description in al-fic interrupt-controller"
* tag 'devicetree-fixes-for-5.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux:
dt-bindings: Fix more $id value mismatches filenames
dt-bindings: nvmem: SID: Fix the examples node names
dt-bindings: nvmem: Add YAML schemas for the generic NVMEM bindings
of: Fix typo in kerneldoc
dt-bindings: interrupt-controller: al-fic: remove redundant binding
dt-bindings: clk: allwinner,sun4i-a10-ccu: Correct path in $id
Pull libnvdimm fixes from Dan Williams:
"A collection of locking and async operations fixes for v5.3-rc2. These
had been soaking in a branch targeting the merge window, but missed
due to a regression hunt. This fixed up version has otherwise been in
-next this past week with no reported issues.
In order to gain confidence in the locking changes the pull also
includes a debug / instrumentation patch to enable lockdep coverage
for libnvdimm subsystem operations that depend on the device_lock for
exclusion. As mentioned in the changelog it is a hack, but it works
and documents the locking expectations of the sub-system in a way that
others can use lockdep to verify. The driver core touches got an ack
from Greg.
Summary:
- Fix duplicate device_unregister() calls (multiple threads competing
to do unregister work when scheduling device removal from a sysfs
attribute of the self-same device).
- Fix badblocks registration order bug. Ensure region badblocks are
initialized in advance of namespace registration.
- Fix a deadlock between the bus lock and probe operations.
- Export device-core infrastructure to coordinate async operations
via the device ->dead state.
- Add device-core infrastructure to validate device_lock() usage with
lockdep"
* tag 'libnvdimm-fixes-5.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm:
driver-core, libnvdimm: Let device subsystems add local lockdep coverage
libnvdimm/bus: Fix wait_nvdimm_bus_probe_idle() ABBA deadlock
libnvdimm/bus: Stop holding nvdimm_bus_list_mutex over __nd_ioctl()
libnvdimm/bus: Prepare the nd_ioctl() path to be re-entrant
libnvdimm/region: Register badblocks before namespaces
libnvdimm/bus: Prevent duplicate device_unregister() calls
drivers/base: Introduce kill_device()
This is unused since commit 9f69a496f1 ("kbuild: split out *.mod out
of {single,multi}-used-m rules").
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Running gen_compile_commands.py after building the kernel with
allnoconfig gave this:
$ ./scripts/gen_compile_commands.py
WARNING: Found 449 entries. Have you compiled the kernel?
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
This file is used by clangd to use language server protocol.
It can be generated at each compile using scripts/gen_compile_commands.py.
Therefore it is different depending on the environment and should be
ignored.
Signed-off-by: Toru Komatsu <k0ma@utam0k.jp>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Commit 415008af32 ("docs-rst: convert lsm from DocBook to ReST")
removed the last users of this macro.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Pull block DMA segment fix from Jens Axboe:
"Here's the virtual boundary segment size fix"
* tag 'for-linus-20190726-2' of git://git.kernel.dk/linux-block:
block: fix max segment size handling in blk_queue_virt_boundary
Pull selinux fix from Paul Moore:
"One small SELinux patch to add some proper bounds/overflow checking
when adding a new sid/secid"
* tag 'selinux-pr-20190726' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux:
selinux: check sidtab limit before adding a new entry
Now that the examples are validated, the examples in the SID binding
generates an error since the node names aren't one of the valid ones.
Let's switch for one that is ok.
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
Signed-off-by: Rob Herring <robh@kernel.org>
The nvmem providers and consumers have a bunch of generic properties that
are needed in a device tree. Add a YAML schemas for those.
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
[Srini: Changed licence to (GPL-2.0 OR BSD-2-Clause)]
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Rob Herring <robh@kernel.org>
"Findfrom" is not a word. Replace the function synopsis by something
that makes sense.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Rob Herring <robh@kernel.org>
Pull SCSI fixes from James Bottomley:
"Nine fixes: The most important core one is the dma_max_mapping_size
fix that corrects the boot problem Gunter Roeck was having. A couple
of other driver only fixes are significant, like the cxgbi selector
support addition, the alua 2 second delay and the fdomain build fix"
* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
scsi: scsi_dh_alua: always use a 2 second delay before retrying RTPG
scsi: ibmvfc: fix WARN_ON during event pool release
scsi: fcoe: fix a typo
scsi: megaraid_sas: Make some functions static
scsi: megaraid_sas: fix panic on loading firmware crashdump
scsi: megaraid_sas: fix spelling mistake "megarid_sas" -> "megaraid_sas"
scsi: core: fix the dma_max_mapping_size call
scsi: fdomain: fix building pcmcia front-end
scsi: target: cxgbit: add support for IEEE_8021QAZ_APP_SEL_STREAM selector
Pull drm fixes from Daniel Vetter:
"Dave seems to collect an entire streak of things happening, so again
me typing pull summary.
Nothing nefarious here, most of the fixes are for new stuff or things
users won't see. The amd-display patches are a bit different, and very
much look like they should have at least some cc: stable tags. Might
be amd is a bit too comfortable with their internal tree and not
enough looking at upstream. Dave&me are looking into this, in case
something needs rectified with process here.
Also no intel fixes pull, but intel CI is general become rather good,
still I guess expect a notch more for -rc3.
Summary:
amdgpu:
- fixes for (new in 5.3) hw support (vega20, navi)
- disable RAS
- lots of display fixes all over (audio, DSC, dongle, clock mgr)
ttm:
- fix dma_free_attrs calls to appease dma debugging
msm:
- fixes for dma-api, locking debug and compiler splats
core:
- fix cmdline mode to not apply rotation if not specified (new in 5.3)
- compiler warn fix"
* tag 'drm-fixes-2019-07-26' of git://anongit.freedesktop.org/drm/drm: (46 commits)
drm/amd/display: Set enabled to false at start of audio disable
drm/amdgpu/smu: move fan rpm query into the asic specific code
drm/amd/powerplay: custom peak clock freq for navi10
drm: silence variable 'conn' set but not used
drm/msm: stop abusing dma_map/unmap for cache
drm/msm/dpu: Correct dpu encoder spinlock initialization
drm/msm: correct NULL pointer dereference in context_init
drm/amd/display: handle active dongle port type is DP++ or DP case
drm/amd/display: do not read link setting if edp not connected
drm/amd/display: Increase size of audios array
drm/amd/display: drop ASSERT() if eDP panel is not connected
drm/amd/display: Only enable audio if speaker allocation exists
drm/amd/display: Fix dc_create failure handling and 666 color depths
drm/amd/display: allocate 4 ddc engines for RV2
drm/amd/display: put back front end initialization sequence
drm/amd/display: Wait for flip to complete
drm/amd/display: Change min_h_sync_width from 8 to 4
drm/amd/display: use encoder's engine id to find matched free audio device
drm/amd/display: fix DMCU hang when going into Modern Standby
drm/amd/display: Disable Audio on reinitialize hardware
...
We should only set the max segment size to unlimited if we actually
have a virt boundary. Otherwise we accidentally clear that limit
when called from the SCSI midlayer, which always calls
blk_queue_virt_boundary, even if that mask is 0.
Fixes: 7ad388d8e4 ("scsi: core: add a host / host template field for the virt boundary")
Reported-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Pull documentation fixes from Jonathan Corbet:
"This is mostly a set of follow-on fixes from Mauro fixing various
fallout from the massive RST conversion; a few other small fixes as
well"
* tag 'docs-5.3-1' of git://git.lwn.net/linux: (21 commits)
docs: phy: Drop duplicate 'be made'
doc:it_IT: translations in process/
docs/vm: transhuge: fix typo in madvise reference
doc:it_IT: rephrase statement
doc:it_IT: align translation to mainline
docs: load_config.py: ensure subdirs end with "/"
docs: virtual: add it to the documentation body
docs: remove extra conf.py files
docs: load_config.py: avoid needing a conf.py just due to LaTeX docs
scripts/sphinx-pre-install: seek for Noto CJK fonts for pdf output
scripts/sphinx-pre-install: cleanup Gentoo checks
scripts/sphinx-pre-install: fix latexmk dependencies
scripts/sphinx-pre-install: don't use LaTeX with CentOS 7
scripts/sphinx-pre-install: fix script for RHEL/CentOS
docs: conf.py: only use CJK if the font is available
docs: conf.py: add CJK package needed by translations
docs: pdf: add all Documentation/*/index.rst to PDF output
docs: fix broken doc references due to renames
docs: power: add it to to the main documentation index
docs: powerpc: convert docs to ReST and rename to *.rst
...
Pull arm64 fixes from Will Deacon:
"There's more here than we usually have at this stage, but that's
mainly down to the stacktrace changes which came in slightly too late
for the merge window.
Summary:
- Big bad batch of MAINTAINERS updates
- Fix handling of SP alignment fault exceptions
- Fix PSTATE.SSBS handling on heterogeneous systems
- Fix fallout from moving to the generic vDSO implementation
- Fix stack unwinding in the face of frame corruption
- Fix off-by-one in IORT code
- Minor SVE cleanups"
* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
ACPI/IORT: Fix off-by-one check in iort_dev_find_its_id()
arm64: entry: SP Alignment Fault doesn't write to FAR_EL1
arm64: Force SSBS on context switch
MAINTAINERS: Update my email address
MAINTAINERS: Update my email address
MAINTAINERS: Fix spelling mistake in my name
MAINTAINERS: Update my email address to @kernel.org
arm64: mm: Drop pte_huge()
arm64/sve: Fix a couple of magic numbers for the Z-reg count
arm64/sve: Factor out FPSIMD to SVE state conversion
arm64: stacktrace: Better handle corrupted stacks
arm64: stacktrace: Factor out backtrace initialisation
arm64: stacktrace: Constify stacktrace.h functions
arm64: vdso: Cleanup Makefiles
arm64: vdso: fix flip/flop vdso build bug
arm64: vdso: Fix population of AT_SYSINFO_EHDR for compat vdso
Pull btrfs fixes from David Sterba:
"Two regression fixes:
- hangs caused by a missing barrier in the locking code
- memory leaks of extent_state due to bad handling of a cached
pointer"
* tag 'for-5.3-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
btrfs: fix extent_state leak in btrfs_lock_and_flush_ordered_range
btrfs: Fix deadlock caused by missing memory barrier
Pull vfs umount_tree() leak fix from Al Viro:
"Fix braino introduced in 'switch the remnants of releasing the
mountpoint away from fs_pin'.
The most visible result is leaking struct mount when mounting btrfs,
making it impossible to shut down"
* 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
fix the struct mount leak in umount_tree()
Pull block fixes from Jens Axboe:
- Several io_uring fixes/improvements:
- Blocking fix for O_DIRECT (me)
- Latter page slowness for registered buffers (me)
- Fix poll hang under certain conditions (me)
- Defer sequence check fix for wrapped rings (Zhengyuan)
- Mismatch in async inc/dec accounting (Zhengyuan)
- Memory ordering issue that could cause stall (Zhengyuan)
- Track sequential defer in bytes, not pages (Zhengyuan)
- NVMe pull request from Christoph
- Set of hang fixes for wbt (Josef)
- Redundant error message kill for libahci (Ding)
- Remove unused blk_mq_sched_started_request() and related ops (Marcos)
- drbd dynamic alloc shash descriptor to reduce stack use (Arnd)
- blkcg ->pd_stat() non-debug print (Tejun)
- bcache memory leak fix (Wei)
- Comment fix (Akinobu)
- BFQ perf regression fix (Paolo)
* tag 'for-linus-20190726' of git://git.kernel.dk/linux-block: (24 commits)
io_uring: ensure ->list is initialized for poll commands
Revert "nvme-pci: don't create a read hctx mapping without read queues"
nvme: fix multipath crash when ANA is deactivated
nvme: fix memory leak caused by incorrect subsystem free
nvme: ignore subnqn for ADATA SX6000LNP
drbd: dynamically allocate shash descriptor
block: blk-mq: Remove blk_mq_sched_started_request and started_request
bcache: fix possible memory leak in bch_cached_dev_run()
io_uring: track io length in async_list based on bytes
io_uring: don't use iov_iter_advance() for fixed buffers
block: properly handle IOCB_NOWAIT for async O_DIRECT IO
blk-mq: allow REQ_NOWAIT to return an error inline
io_uring: add a memory barrier before atomic_read
rq-qos: use a mb for got_token
rq-qos: set ourself TASK_UNINTERRUPTIBLE after we schedule
rq-qos: don't reset has_sleepers on spurious wakeups
rq-qos: fix missed wake-ups in rq_qos_throttle
wait: add wq_has_single_sleeper helper
block, bfq: check also in-flight I/O in dispatch plugging
block: fix sysfs module parameters directory path in comment
...
Pull sound fixes from Takashi Iwai:
"All relatively small changes:
- a regression fix for PCM link code with CONFIG_REFCOUNT_FULL;
stumbled on a slight difference between atomic_t and refcount_t
- a couple of HD-audio stabilization patches addressing the too slow
PM resume seen on some Intel chips
- a series of ALSA compress-offload API fixes, including the
regression by the previous capture stream support
- trivial LINE6 USB-audio driver fixes, a new Conexant HD-audio chip
coverage, and a fix in AC97 bus error path"
* tag 'sound-5.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
ALSA: hda - Add a conexant codec entry to let mute led work
ALSA: hda - Fix intermittent CORB/RIRB stall on Intel chips
ALSA: ac97: Fix double free of ac97_codec_device
ALSA: compress: Be more restrictive about when a drain is allowed
ALSA: compress: Don't allow paritial drain operations on capture streams
ALSA: compress: Prevent bypasses of set_params
ALSA: compress: Fix regression on compressed capture streams
ALSA: line6: Fix a typo
ALSA: pcm: Fix refcount_inc() on zero usage
ALSA: line6: Fix wrong altsetting for LINE6_PODHD500_1
ALSA: hda - Optimize resume for codecs without jack detection
Pull IOMMU fixes from Joerg Roedel:
- revert an Intel VT-d patch that caused boot problems on some machines
- fix AMD IOMMU interrupts with x2apic enabled
- fix a potential crash when Intel VT-d domain allocation fails
- fix crash in Intel VT-d driver when accessing a domain without a
flush queue
- formatting fix for new Intel VT-d debugfs code
- fix for use-after-free bug in IOVA code
- fix for a NULL-pointer dereference in Intel VT-d driver when PCI
hotplug is used
- compilation fix for one of the previous fixes
* tag 'iommu-fixes-v5.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu:
iommu/amd: Add support for X2APIC IOMMU interrupts
iommu/iova: Fix compilation error with !CONFIG_IOMMU_IOVA
iommu/vt-d: Print pasid table entries MSB to LSB in debugfs
iommu/iova: Remove stale cached32_node
iommu/vt-d: Check if domain->pgd was allocated
iommu/vt-d: Don't queue_iova() if there is no flush queue
iommu/vt-d: Avoid duplicated pci dma alias consideration
Revert "iommu/vt-d: Consolidate domain_init() to avoid duplication"
Pull iscsi_ibft fix from Konrad Rzeszutek Wilk:
"One tiny fix to enable iSCSI IBFT to be compiled under ARM"
* 'for-linus-5.3' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/ibft:
iscsi_ibft: make ISCSI_IBFT depend on ACPI instead of ISCSI_IBFT_FIND
Pull hwmon fixes from Guenter Roeck:
"A couple of hwmon bug fixes:
- Update k8temp documentation URL
- Register address fixes in nct6775 driver
- Fix potential division by zero in occ driver"
* tag 'hwmon-for-v5.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging:
hwmon: (k8temp) documentation: update URL of datasheet
hwmon: (nct6775) Fix register address and added missed tolerance for nct6106
hwmon: (occ) Fix division by zero issue
