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2017-08-22IB/hfi1: Load fallback platform configuration per HFI deviceJakub Byczkowski
Currently fallback configuration is loaded once per driver instance. With multiple HFI devices in the same system the current code may not load the platform config data for the device. Change fallback platform config data loading to be per device. Reviewed-by: Easwar Hariharan <easwar.hariharan@intel.com> Reviewed-by: Ira Weiny <ira.weiny@intel.com> Signed-off-by: Jakub Byczkowski <jakub.byczkowski@intel.com> Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-08-22IB/hfi1: Add flag for platform config scratch register readJakub Byczkowski
Add flag in pport data structure to determine when platform config was read from scratch registers. Change conditions in parse_platform_config and get_platform_config_field to use the new flag. Reviewed-by: Easwar Hariharan <easwar.hariharan@intel.com> Reviewed-by: Ira Weiny <ira.weiny@intel.com> Signed-off-by: Jakub Byczkowski <jakub.byczkowski@intel.com> Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-08-22IB/hfi1: Document phys port state bits not used in IBDennis Dalessandro
A couple bits are used by OPA for link physical state that are not present as part of InfiniBand. Add a short blurb what those states mean and removed an unused state. Cc: Leon Romanovsky <leon@kernel.org> Reviewed-by: Todd Rimmer <todd.rimmer@intel.com> Reviewed-by: Brent Rothermel <brent.r.rothermel@intel.com> Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com> Reviewed-by: Leon Romanovsky <leonro@mellanox.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-08-22IB/hfi1: Check xchg returned value for queuing link down entrySebastian Sanchez
Check xchg returned value for queuing link down entry to guarantee proper atomic value reads. Fixes: 626c077c025f ("IB/hfi1: Prevent link down request double queuing") Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com> Signed-off-by: Sebastian Sanchez <sebastian.sanchez@intel.com> Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-08-22IB/hfi1: fix spelling mistake: "Maximim" -> "Maximum"Colin Ian King
Trivial fix to spelling mistake in pr_warn_ratelimited warning message Signed-off-by: Colin Ian King <colin.king@canonical.com> Acked-by: Dennis Dalessandro <dennis.dalessandro@intel.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-08-22IB/hfi1: Enable RDMA_CAP_OPA_AH in hfi driver to support extended LIDsDasaratharaman Chandramouli
Enabling this bit helps core components query for extended address support using the rdma_cap_opa_ah interface. Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com> Signed-off-by: Dasaratharaman Chandramouli <dasaratharaman.chandramouli@intel.com> Signed-off-by: Don Hiatt <don.hiatt@intel.com> Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-08-22IB/hfi1: Enhance PIO/SDMA send for 16BDon Hiatt
PIO/SDMA send logic now uses the hdr_type field to determine the type of packet that has been constructed. Based on the hdr_type, certain things such as PBC flags, padding count and the LT extra trailing bytes are determined. Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com> Signed-off-by: Dasaratharaman Chandramouli <dasaratharaman.chandramouli@intel.com> Signed-off-by: Don Hiatt <don.hiatt@intel.com> Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-08-22IB/hfi1: Add 16B RC/UC supportDon Hiatt
Add 16B bypass packet support for RC/UC traffic types. Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com> Signed-off-by: Don Hiatt <don.hiatt@intel.com> Signed-off-by: Dasaratharaman Chandramouli <dasaratharaman.chandramouli@intel.com> Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-08-22IB/rdmavt, hfi1, qib: Enhance rdmavt and hfi1 to use 32 bit lidsDasaratharaman Chandramouli
Increase lid used in hfi1 driver to 32 bits. qib continues to use 16 bit lids. Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com> Signed-off-by: Dasaratharaman Chandramouli <dasaratharaman.chandramouli@intel.com> Signed-off-by: Don Hiatt <don.hiatt@intel.com> Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-08-22IB/hfi1: Add 16B trace supportDon Hiatt
Add trace support to 16B bypass packets during send and receive. Sample input header trace: <idle>-0 [000] d.h. 271742.509477: input_ibhdr: [0000:05:00.0] (16B) len:24 sc:0 dlid:0xf0000b slid:0x10002 age:0 becn:0 fecn:0 l4:10 rc:0 sc:0 pkey:0x8001 entropy:0x0000 op:0x65,UD_SEND_ONLY_WITH_IMMEDIATE se:0 m:1 pad:3 tver:0 qpn:0xffffff a:0 psn:0x00000001 hlen:248 deth qkey 0x01234567 sqpn 0x000004 Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com> Signed-off-by: Don Hiatt <don.hiatt@intel.com> Signed-off-by: Dasaratharaman Chandramouli <dasaratharaman.chandramouli@intel.com> Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-08-22IB/hfi1: Add 16B UD supportDon Hiatt
Add 16B bypass packet support for UD traffic types. Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com> Signed-off-by: Dasaratharaman Chandramouli <dasaratharaman.chandramouli@intel.com> Signed-off-by: Don Hiatt <don.hiatt@intel.com> Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-08-22IB/hfi1: Determine 9B/16B L2 header type based on Address handleDon Hiatt
When address handle attributes are initialized, the LIDs are transformed to be in the 32 bit LID space. When constructing the header, hfi1 driver will look at the LID to determine the packet header to be created. Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com> Signed-off-by: Dasaratharaman Chandramouli <dasaratharaman.chandramouli@intel.com> Signed-off-by: Don Hiatt <don.hiatt@intel.com> Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-08-22IB/hfi1: Add support to process 16B header errorsDon Hiatt
Enhance hdr_rcverr() to also handle errors during 16B bypass packet receive. Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com> Signed-off-by: Don Hiatt <don.hiatt@intel.com> Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-08-22IB/hfi1: Add support to send 16B bypass packetsDon Hiatt
We introduce struct hfi1_opa_header as a union of ib (9B) and 16B headers. Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com> Signed-off-by: Dasaratharaman Chandramouli <dasaratharaman.chandramouli@intel.com> Signed-off-by: Don Hiatt <don.hiatt@intel.com> Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-08-22IB/hfi1: Add support to receive 16B bypass packetsDon Hiatt
We introduce a struct hfi1_16b_header to support 16B headers. 16B bypass packets are received by the driver and processed similar to 9B packets. Add basic support to handle 16B packets. Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com> Signed-off-by: Don Hiatt <don.hiatt@intel.com> Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-08-22IB/rdmavt, hfi1, qib: Modify check_ah() to account for extended LIDsDon Hiatt
rvt_check_ah() delegates lid verification to underlying driver. Underlying driver uses different conditions to check for dlid depending on whether the device supports extended LIDs Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com> Signed-off-by: Dasaratharaman Chandramouli <dasaratharaman.chandramouli@intel.com> Signed-off-by: Don Hiatt <don.hiatt@intel.com> Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-08-22IB/hf1: User context locking is inconsistentMichael J. Ruhl
There is a mixture of mutex and spinlocks to protect receive context (rcd/uctxt) information. This is not used consistently. Use the mutex to protect device receive context information only. Use the spinlock to protect sub context information only. Protect access to items in the rcd array with a spinlock and reference count. Remove spinlock around dd->rcd array cleanup. Since interrupts are disabled and cleaned up before this point, this lock is not useful. Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com> Reviewed-by: Sebastian Sanchez <sebastian.sanchez@intel.com> Signed-off-by: Michael J. Ruhl <michael.j.ruhl@intel.com> Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-08-22IB/hfi1: Protect context array set/clear with spinlockMichael J. Ruhl
The rcd array can be accessed from user context or during interrupts. Protecting this with a mutex isn't a good idea because the mutex should not be used from an IRQ. Protect the allocation and freeing of rcd array elements with a spinlock. Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com> Reviewed-by: Sebastian Sanchez <sebastian.sanchez@intel.com> Signed-off-by: Michael J. Ruhl <michael.j.ruhl@intel.com> Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-08-22IB/hfi1: Use host_link_state to read state when DC is shut downBartlomiej Dudek
When DC is shut down (by e.g. disconnecting the cable), the driver should use host_link_state to get port's current physical state. This is due to the fact that physical state is read from DC's CSRs and when DC is shut down and state is changed, its registers are not impacted. Reviewed-by: Jakub Byczkowski <jakub.byczkowski@intel.com> Signed-off-by: Bartlomiej Dudek <bartlomiej.dudek@intel.com> Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-08-22IB/hfi1: Remove lstate from hfi1_pportdataByczkowski, Jakub
Do not track logical state separately from host_link_state. Deduce logical state from host_link_state when required. Transitions in set_link_state and goto_offline already make sure host_link_state reflects hardware's logical state properly. Reviewed-by: Ira Weiny <ira.weiny@intel.com> Signed-off-by: Jakub Byczkowski <jakub.byczkowski@intel.com> Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-08-22IB/hfi1: Remove pmtu from the QP structureSebastian Sanchez
The pmtu field doens't have be stored in the QP structure as it can easily be calculated when needed. Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com> Signed-off-by: Sebastian Sanchez <sebastian.sanchez@intel.com> Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-08-22IB/hfi1: Revert egress pkey check enforcementAlex Estrin
Current code has some serious flaws. Disarm the flag pending an appropriate patch. Fixes: 53526500f301 ("IB/hfi1: Permanently enable P_Key checking in HFI") Cc: stable@vger.kernel.org Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com> Signed-off-by: Alex Estrin <alex.estrin@intel.com> Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-08-22ipv6: add rcu grace period before freeing fib6_nodeWei Wang
We currently keep rt->rt6i_node pointing to the fib6_node for the route. And some functions make use of this pointer to dereference the fib6_node from rt structure, e.g. rt6_check(). However, as there is neither refcount nor rcu taken when dereferencing rt->rt6i_node, it could potentially cause crashes as rt->rt6i_node could be set to NULL by other CPUs when doing a route deletion. This patch introduces an rcu grace period before freeing fib6_node and makes sure the functions that dereference it takes rcu_read_lock(). Note: there is no "Fixes" tag because this bug was there in a very early stage. Signed-off-by: Wei Wang <weiwan@google.com> Acked-by: Eric Dumazet <edumazet@google.com> Acked-by: Martin KaFai Lau <kafai@fb.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-22IB/core: Fix input len in multiple user verbsAmrani, Ram
Most user verbs pass user data to the kernel with the inclusion of the ib_uverbs_cmd_hdr structure. This is problematic because the vendor has no ideas if the verb was called by a legacy verb or an extended verb. Also, the incosistency between the verbs is confusing. Fixes: 565197dd8fb1 ("IB/core: Extend ib_uverbs_create_cq") Signed-off-by: Ram Amrani <Ram.Amrani@cavium.com> Signed-off-by: Ariel Elior <Ariel.Elior@cavium.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-08-22mlx5: Replace PCI pool old APIRomain Perier
The PCI pool API is deprecated. This commit replaces the PCI pool old API by the appropriate function with the DMA pool API. Signed-off-by: Romain Perier <romain.perier@collabora.com> Reviewed-by: Peter Senna Tschudin <peter.senna@collabora.com> Acked-by: Doug Ledford <dledford@redhat.com> Tested-by: Doug Ledford <dledford@redhat.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-08-22mlx4: Replace PCI pool old APIRomain Perier
The PCI pool API is deprecated. This commit replaces the PCI pool old API by the appropriate function with the DMA pool API. Signed-off-by: Romain Perier <romain.perier@collabora.com> Acked-by: Peter Senna Tschudin <peter.senna@collabora.com> Tested-by: Peter Senna Tschudin <peter.senna@collabora.com> Reviewed-by: Leon Romanovsky <leonro@mellanox.com> Acked-by: Doug Ledford <dledford@redhat.com> Tested-by: Doug Ledford <dledford@redhat.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-08-22IB/mthca: Replace PCI pool old APIRomain Perier
The PCI pool API is deprecated. This commit replaces the PCI pool old API by the appropriate function with the DMA pool API. Signed-off-by: Romain Perier <romain.perier@collabora.com> Acked-by: Peter Senna Tschudin <peter.senna@collabora.com> Tested-by: Peter Senna Tschudin <peter.senna@collabora.com> Acked-by: Doug Ledford <dledford@redhat.com> Tested-by: Doug Ledford <dledford@redhat.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-08-22RDMA/uverbs: Initialize cq_context appropriatelyBharat Potnuri
Initializing cq_context with ev_queue in create_cq(), leads to NULL pointer dereference in ib_uverbs_comp_handler(), if application doesnot use completion channel. This patch fixes the cq_context initialization. Fixes: 1e7710f3f65 ("IB/core: Change completion channel to use the reworked") Cc: stable@vger.kernel.org # 4.12 Signed-off-by: Potnuri Bharat Teja <bharat@chelsio.com> Reviewed-by: Matan Barak <matanb@mellanox.com> Signed-off-by: Doug Ledford <dledford@redhat.com> (cherry picked from commit 699a2d5b1b880b4e4e1c7d55fa25659322cf5b51)
2017-08-22Merge branch 'master' of ↵David S. Miller
git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec Steffen Klassert says: ==================== pull request (net): ipsec 2017-08-21 1) Fix memleaks when ESP takes an error path. 2) Fix null pointer dereference when creating a sub policy that matches the same outer flow as main policy does. From Koichiro Den. 3) Fix possible out-of-bound access in xfrm_migrate. This patch should go to the stable trees too. From Vladis Dronov. 4) ESP can return positive and negative error values, so treat both cases as an error. Please pull or let me know if there are problems. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-22ipv6: accept 64k - 1 packet length in ip6_find_1stfragopt()Stefano Brivio
A packet length of exactly IPV6_MAXPLEN is allowed, we should refuse parsing options only if the size is 64KiB or more. While at it, remove one extra variable and one assignment which were also introduced by the commit that introduced the size check. Checking the sum 'offset + len' and only later adding 'len' to 'offset' doesn't provide any advantage over directly summing to 'offset' and checking it. Fixes: 6399f1fae4ec ("ipv6: avoid overflow of offset in ip6_find_1stfragopt") Signed-off-by: Stefano Brivio <sbrivio@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-22Merge tag 'mfd-fixes-4.13' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd Pull MFD fix from Lee Jones: "Revert duplicate commit in da9062-core" * tag 'mfd-fixes-4.13' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd: Revert "mfd: da9061: Fix to remove BBAT_CONT register from chip model"
2017-08-22drm/msm/mdp5: mark runtime_pm functions as __maybe_unusedArnd Bergmann
When CONFIG_PM is disabled, we get harmless warnings about unused functions: drivers/gpu/drm/msm/mdp/mdp5/mdp5_kms.c:1025:12: error: 'mdp5_runtime_resume' defined but not used [-Werror=unused-function] static int mdp5_runtime_resume(struct device *dev) ^~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/msm/mdp/mdp5/mdp5_kms.c:1015:12: error: 'mdp5_runtime_suspend' defined but not used [-Werror=unused-function] static int mdp5_runtime_suspend(struct device *dev) ^~~~~~~~~~~~~~~~~~~~ This marks both functions as __maybe_unused so the compiler can drop them silently. Fixes: d68fe15b1878 ("drm/msm/mdp5: Use runtime PM get/put API instead of toggling clocks") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Rob Clark <robdclark@gmail.com>
2017-08-22drm/msm: remove unused variableArnd Bergmann
A cleanup left behind an unused variable that we have to remove in order to avoid this harmless warning: drivers/gpu/drm/msm/adreno/a5xx_gpu.c: In function 'a5xx_zap_shader_init': drivers/gpu/drm/msm/adreno/a5xx_gpu.c:493:19: error: unused variable 'a5xx_gpu' [-Werror=unused-variable] Fixes: 8d6f08272b6f ("drm/msm: Remove uneeded platform dev members") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Rob Clark <robdclark@gmail.com>
2017-08-22drm/msm/mdp5: make helper function staticRob Clark
Not needed outside of mdp5_crtc.c. Signed-off-by: Rob Clark <robdclark@gmail.com>
2017-08-22drm/msm: make msm_framebuffer_init() staticRob Clark
Only needed in msm_fb.c so don't export it. Signed-off-by: Rob Clark <robdclark@gmail.com>
2017-08-22drm/msm: add helper to allocate stolen fbRob Clark
We'll later want to re-use this for state-readback when bootloader enables display, so that we can create an fb for the initial plane->state->fb. Signed-off-by: Rob Clark <robdclark@gmail.com>
2017-08-22drm/msm: don't track fbdev's gem object separatelyRob Clark
The drm_framebuffer is refcnt'd these days and will unref the underlying bo as needed. So we can simplify a little. Signed-off-by: Rob Clark <robdclark@gmail.com>
2017-08-22drm/msm: add modeset module paramRob Clark
At least for debugging it is nice to have an easy way to force the driver not to load. Signed-off-by: Rob Clark <robdclark@gmail.com>
2017-08-22drm/msm/mdp5: add tracking for clk enable-countRob Clark
Accessing registers for an unclocked block is an insta-reboot on snapdragon devices. So add a bit of logic to track the enable_count so we can WARN_ON() unclocked register writes. This makes it much easier to track down mistakes. Signed-off-by: Rob Clark <robdclark@gmail.com>
2017-08-22drm/msm: remove unused defineRob Clark
Signed-off-by: Rob Clark <robdclark@gmail.com>
2017-08-22drm/msm: Add a helper function for in-kernel buffer allocationsJordan Crouse
Nearly all of the buffer allocations for kernel allocate an buffer object, virtual address and GPU iova at the same time. Make a helper function to handle the details. Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org> [dropped msm_fbdev conversion to new helper, since it interferes with display-handover work, where we want to separate allocation and mapping] Signed-off-by: Rob Clark <robdclark@gmail.com>
2017-08-22drm/msm: Attach the GPU MMU when it is createdJordan Crouse
Currently the GPU MMU is attached in the adreno_gpu code but as more and more of the GPU initialization moves to the generic GPU path we have a need to map and use GPU memory earlier and earlier. There isn't any reason to defer attaching the MMU until later so attach it right after the address space is created so it can be used immediately. Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org> Signed-off-by: Rob Clark <robdclark@gmail.com>
2017-08-22arm64: kaslr: Adjust the offset to avoid Image across alignment boundaryCatalin Marinas
With 16KB pages and a kernel Image larger than 16MB, the current kaslr_early_init() logic for avoiding mappings across swapper table boundaries fails since increasing the offset by kimg_sz just moves the problem to the next boundary. This patch rounds the offset down to (1 << SWAPPER_TABLE_SHIFT) if the Image crosses a PMD_SIZE boundary. Fixes: afd0e5a87670 ("arm64: kaslr: Fix up the kernel image alignment") Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Will Deacon <will.deacon@arm.com> Cc: Neeraj Upadhyay <neeraju@codeaurora.org> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
2017-08-22arm64: kaslr: ignore modulo offset when validating virtual displacementArd Biesheuvel
In the KASLR setup routine, we ensure that the early virtual mapping of the kernel image does not cover more than a single table entry at the level above the swapper block level, so that the assembler routines involved in setting up this mapping can remain simple. In this calculation we add the proposed KASLR offset to the values of the _text and _end markers, and reject it if they would end up falling in different swapper table sized windows. However, when taking the addresses of _text and _end, the modulo offset (the physical displacement modulo 2 MB) is already accounted for, and so adding it again results in incorrect results. So disregard the modulo offset from the calculation. Fixes: 08cdac619c81 ("arm64: relocatable: deal with physically misaligned ...") Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Tested-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Will Deacon <will.deacon@arm.com>
2017-08-22arm64: mm: abort uaccess retries upon fatal signalMark Rutland
When there's a fatal signal pending, arm64's do_page_fault() implementation returns 0. The intent is that we'll return to the faulting userspace instruction, delivering the signal on the way. However, if we take a fatal signal during fixing up a uaccess, this results in a return to the faulting kernel instruction, which will be instantly retried, resulting in the same fault being taken forever. As the task never reaches userspace, the signal is not delivered, and the task is left unkillable. While the task is stuck in this state, it can inhibit the forward progress of the system. To avoid this, we must ensure that when a fatal signal is pending, we apply any necessary fixup for a faulting kernel instruction. Thus we will return to an error path, and it is up to that code to make forward progress towards delivering the fatal signal. Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Laura Abbott <labbott@redhat.com> Cc: stable@vger.kernel.org Reviewed-by: Steve Capper <steve.capper@arm.com> Tested-by: Steve Capper <steve.capper@arm.com> Reviewed-by: James Morse <james.morse@arm.com> Tested-by: James Morse <james.morse@arm.com> Signed-off-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
2017-08-22arm64: fpsimd: Prevent registers leaking across execDave Martin
There are some tricky dependencies between the different stages of flushing the FPSIMD register state during exec, and these can race with context switch in ways that can cause the old task's regs to leak across. In particular, a context switch during the memset() can cause some of the task's old FPSIMD registers to reappear. Disabling preemption for this small window would be no big deal for performance: preemption is already disabled for similar scenarios like updating the FPSIMD registers in sigreturn. So, instead of rearranging things in ways that might swap existing subtle bugs for new ones, this patch just disables preemption around the FPSIMD state flushing so that races of this type can't occur here. This brings fpsimd_flush_thread() into line with other code paths. Cc: stable@vger.kernel.org Fixes: 674c242c9323 ("arm64: flush FP/SIMD state correctly after execve()") Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Dave Martin <Dave.Martin@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
2017-08-22perf tools: Fix static linking with libunwindKonstantin Khlebnikov
* libunwind-x86_64 must be linked before libunwind * libunwind requires liblzma * static libunwind conflicts with static libgcc_eh Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/150322917247.129799.14247751517961953155.stgit@buzz Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-08-22perf tools: Fix static linking with libdw from elfutilsKonstantin Khlebnikov
Fix feature test for static libdw: link required dependencies. Backends of libebl are not statically linked thus libdl is required. In Debian/Ubuntu libdw-dev includes libebl.a starting from 0.166-1. Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/150322916720.129772.7959925864494283854.stgit@buzz Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-08-22perf: Fix documentation for sysctls perf_event_paranoid and perf_event_mlock_kbKonstantin Khlebnikov
Fix misprint CAP_IOC_LOCK -> CAP_IPC_LOCK. This capability have nothing to do with raw tracepoints. This part is about bypassing mlock limits. Sysctl kernel.perf_event_paranoid = -1 allows raw and ftrace function tracepoints without CAP_SYS_ADMIN. Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/150322916080.129746.11285255474738558340.stgit@buzz Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-08-22perf tools: Really install manpages via 'make install-man'Konstantin Khlebnikov
Target install-man builds them but forget to install. Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Borislav Petkov <borislav.petkov@amd.com> Cc: Peter Zijlstra <peterz@infradead.org> Fixes: af3df2cf17f5 ("perf tools: Try to build Documentation when installing") Link: http://lkml.kernel.org/r/150322915300.129715.13645857235229756834.stgit@buzz Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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