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2019-08-10Merge tag 'powerpc-5.3-4' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linuxLinus Torvalds1-4/+4
Pull powerpc fix from Michael Ellerman: "Just one fix, a revert of a commit that was meant to be a minor improvement to some inline asm, but ended up having no real benefit with GCC and broke booting 32-bit machines when using Clang. Thanks to: Arnd Bergmann, Christophe Leroy, Nathan Chancellor, Nick Desaulniers, Segher Boessenkool" * tag 'powerpc-5.3-4' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: Revert "powerpc: slightly improve cache helpers"
2019-08-09Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds1-10/+5
Pull kvm fixes from Paolo Bonzini: "Bugfixes (arm and x86) and cleanups" * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: selftests: kvm: Adding config fragments KVM: selftests: Update gitignore file for latest changes kvm: remove unnecessary PageReserved check KVM: arm/arm64: vgic: Reevaluate level sensitive interrupts on enable KVM: arm: Don't write junk to CP15 registers on reset KVM: arm64: Don't write junk to sysregs on reset KVM: arm/arm64: Sync ICH_VMCR_EL2 back when about to block x86: kvm: remove useless calls to kvm_para_available KVM: no need to check return value of debugfs_create functions KVM: remove kvm_arch_has_vcpu_debugfs() KVM: Fix leak vCPU's VMCS value into other pCPU KVM: Check preempted_in_kernel for involuntary preemption KVM: LAPIC: Don't need to wakeup vCPU twice afer timer fire arm64: KVM: hyp: debug-sr: Mark expected switch fall-through KVM: arm64: Update kvm_arm_exception_class and esr_class_str for new EC KVM: arm: vgic-v3: Mark expected switch fall-through arm64: KVM: regmap: Fix unexpected switch fall-through KVM: arm/arm64: Introduce kvm_pmu_vcpu_init() to setup PMU counter index
2019-08-09Merge tag 'kvmarm-fixes-for-5.3' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEADPaolo Bonzini215-3626/+3402
KVM/arm fixes for 5.3 - A bunch of switch/case fall-through annotation, fixing one actual bug - Fix PMU reset bug - Add missing exception class debug strings
2019-08-05KVM: remove kvm_arch_has_vcpu_debugfs()Paolo Bonzini1-10/+0
There is no need for this function as all arches have to implement kvm_arch_create_vcpu_debugfs() no matter what. A #define symbol let us actually simplify the code. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2019-08-05KVM: Fix leak vCPU's VMCS value into other pCPUWanpeng Li1-0/+5
After commit d73eb57b80b (KVM: Boost vCPUs that are delivering interrupts), a five years old bug is exposed. Running ebizzy benchmark in three 80 vCPUs VMs on one 80 pCPUs Skylake server, a lot of rcu_sched stall warning splatting in the VMs after stress testing: INFO: rcu_sched detected stalls on CPUs/tasks: { 4 41 57 62 77} (detected by 15, t=60004 jiffies, g=899, c=898, q=15073) Call Trace: flush_tlb_mm_range+0x68/0x140 tlb_flush_mmu.part.75+0x37/0xe0 tlb_finish_mmu+0x55/0x60 zap_page_range+0x142/0x190 SyS_madvise+0x3cd/0x9c0 system_call_fastpath+0x1c/0x21 swait_active() sustains to be true before finish_swait() is called in kvm_vcpu_block(), voluntarily preempted vCPUs are taken into account by kvm_vcpu_on_spin() loop greatly increases the probability condition kvm_arch_vcpu_runnable(vcpu) is checked and can be true, when APICv is enabled the yield-candidate vCPU's VMCS RVI field leaks(by vmx_sync_pir_to_irr()) into spinning-on-a-taken-lock vCPU's current VMCS. This patch fixes it by checking conservatively a subset of events. Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Radim Krčmář <rkrcmar@redhat.com> Cc: Christian Borntraeger <borntraeger@de.ibm.com> Cc: Marc Zyngier <Marc.Zyngier@arm.com> Cc: stable@vger.kernel.org Fixes: 98f4a1467 (KVM: add kvm_arch_vcpu_runnable() test to kvm_vcpu_on_spin() loop) Signed-off-by: Wanpeng Li <wanpengli@tencent.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2019-07-31Revert "powerpc: slightly improve cache helpers"Michael Ellerman1-4/+4
This reverts commit 6c5875843b87c3adea2beade9d1b8b3d4523900a. It triggers a probable compiler bug on clang which leads to crashes. With GCC it allows the compiler to use a more efficient register allocation but current GCC versions never do that at any of the current call sites, so there's no benefit. Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2019-07-31powerpc/kasan: fix early boot failure on PPC32Christophe Leroy1-2/+5
Due to commit 4a6d8cf90017 ("powerpc/mm: don't use pte_alloc_kernel() until slab is available on PPC32"), pte_alloc_kernel() cannot be used during early KASAN init. Fix it by using memblock_alloc() instead. Fixes: 2edb16efc899 ("powerpc/32: Add KASAN support") Cc: stable@vger.kernel.org # v5.2+ Reported-by: Erhard F. <erhard_f@mailbox.org> Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/da89670093651437f27d2975224712e0a130b055.1564552796.git.christophe.leroy@c-s.fr
2019-07-31powerpc/spe: Mark expected switch fall-throughsMichael Ellerman1-0/+4
Mark switch cases where we are expecting to fall through. Fixes errors such as below, seen with mpc85xx_defconfig: arch/powerpc/kernel/align.c: In function 'emulate_spe': arch/powerpc/kernel/align.c:178:8: error: this statement may fall through ret |= __get_user_inatomic(temp.v[3], p++); ^~ Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20190730141917.21817-1-mpe@ellerman.id.au
2019-07-30powerpc/nvdimm: Pick nearby online node if the device node is not onlineAneesh Kumar K.V1-2/+27
Currently, nvdimm subsystem expects the device numa node for SCM device to be an online node. It also doesn't try to bring the device numa node online. Hence if we use a non-online numa node as device node we hit crashes like below. This is because we try to access uninitialized NODE_DATA in different code paths. cpu 0x0: Vector: 300 (Data Access) at [c0000000fac53170] pc: c0000000004bbc50: ___slab_alloc+0x120/0xca0 lr: c0000000004bc834: __slab_alloc+0x64/0xc0 sp: c0000000fac53400 msr: 8000000002009033 dar: 73e8 dsisr: 80000 current = 0xc0000000fabb6d80 paca = 0xc000000003870000 irqmask: 0x03 irq_happened: 0x01 pid = 7, comm = kworker/u16:0 Linux version 5.2.0-06234-g76bd729b2644 (kvaneesh@ltc-boston123) (gcc version 7.4.0 (Ubuntu 7.4.0-1ubuntu1~18.04.1)) #135 SMP Thu Jul 11 05:36:30 CDT 2019 enter ? for help [link register ] c0000000004bc834 __slab_alloc+0x64/0xc0 [c0000000fac53400] c0000000fac53480 (unreliable) [c0000000fac53500] c0000000004bc818 __slab_alloc+0x48/0xc0 [c0000000fac53560] c0000000004c30a0 __kmalloc_node_track_caller+0x3c0/0x6b0 [c0000000fac535d0] c000000000cfafe4 devm_kmalloc+0x74/0xc0 [c0000000fac53600] c000000000d69434 nd_region_activate+0x144/0x560 [c0000000fac536d0] c000000000d6b19c nd_region_probe+0x17c/0x370 [c0000000fac537b0] c000000000d6349c nvdimm_bus_probe+0x10c/0x230 [c0000000fac53840] c000000000cf3cc4 really_probe+0x254/0x4e0 [c0000000fac538d0] c000000000cf429c driver_probe_device+0x16c/0x1e0 [c0000000fac53950] c000000000cf0b44 bus_for_each_drv+0x94/0x130 [c0000000fac539b0] c000000000cf392c __device_attach+0xdc/0x200 [c0000000fac53a50] c000000000cf231c bus_probe_device+0x4c/0xf0 [c0000000fac53a90] c000000000ced268 device_add+0x528/0x810 [c0000000fac53b60] c000000000d62a58 nd_async_device_register+0x28/0xa0 [c0000000fac53bd0] c0000000001ccb8c async_run_entry_fn+0xcc/0x1f0 [c0000000fac53c50] c0000000001bcd9c process_one_work+0x46c/0x860 [c0000000fac53d20] c0000000001bd4f4 worker_thread+0x364/0x5f0 [c0000000fac53db0] c0000000001c7260 kthread+0x1b0/0x1c0 [c0000000fac53e20] c00000000000b954 ret_from_kernel_thread+0x5c/0x68 The patch tries to fix this by picking the nearest online node as the SCM node. This does have a problem of us losing the information that SCM node is equidistant from two other online nodes. If applications need to understand these fine-grained details we should express then like x86 does via /sys/devices/system/node/nodeX/accessY/initiators/ With the patch we get # numactl -H available: 2 nodes (0-1) node 0 cpus: node 0 size: 0 MB node 0 free: 0 MB node 1 cpus: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 node 1 size: 130865 MB node 1 free: 129130 MB node distances: node 0 1 0: 10 20 1: 20 10 # cat /sys/bus/nd/devices/region0/numa_node 0 # dmesg | grep papr_scm [ 91.332305] papr_scm ibm,persistent-memory:ibm,pmemory@44104001: Region registered with target node 2 and online node 0 Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20190729095128.23707-1-aneesh.kumar@linux.ibm.com
2019-07-29powerpc/kvm: Fall through switch case explicitlySantosh Sivaraj1-0/+1
Implicit fallthrough warning was enabled globally which broke the build. Make it explicit with a `fall through` comment. Signed-off-by: Santosh Sivaraj <santosh@fossix.org> Reviewed-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20190729055536.25591-1-santosh@fossix.org
2019-07-29powerpc: Wire up clone3 syscallMichael Ellerman4-1/+15
Wire up the new clone3 syscall added in commit 7f192e3cd316 ("fork: add clone3"). This requires a ppc_clone3 wrapper, in order to save the non-volatile GPRs before calling into the generic syscall code. Otherwise we hit the BUG_ON in CHECK_FULL_REGS in copy_thread(). Lightly tested using Christian's test code on a Power8 LE VM. Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Acked-by: Christian Brauner <christian@brauner.io> Link: https://lore.kernel.org/r/20190724140259.23554-1-mpe@ellerman.id.au
2019-07-28Merge tag 'spdx-5.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/spdxLinus Torvalds1-1/+1
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
2019-07-26Merge tag 'docs-5.3-1' of git://git.lwn.net/linuxLinus Torvalds1-1/+1
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 ...
2019-07-25treewide: add "WITH Linux-syscall-note" to SPDX tag of uapi headersMasahiro Yamada1-1/+1
UAPI headers licensed under GPL are supposed to have exception "WITH Linux-syscall-note" so that they can be included into non-GPL user space application code. The exception note is missing in some UAPI headers. Some of them slipped in by the treewide conversion commit b24413180f56 ("License cleanup: add SPDX GPL-2.0 license identifier to files with no license"). Just run: $ git show --oneline b24413180f56 -- arch/x86/include/uapi/asm/ I believe they are not intentional, and should be fixed too. This patch was generated by the following script: git grep -l --not -e Linux-syscall-note --and -e SPDX-License-Identifier \ -- :arch/*/include/uapi/asm/*.h :include/uapi/ :^*/Kbuild | while read file do sed -i -e '/[[:space:]]OR[[:space:]]/s/\(GPL-[^[:space:]]*\)/(\1 WITH Linux-syscall-note)/g' \ -e '/[[:space:]]or[[:space:]]/s/\(GPL-[^[:space:]]*\)/(\1 WITH Linux-syscall-note)/g' \ -e '/[[:space:]]OR[[:space:]]/!{/[[:space:]]or[[:space:]]/!s/\(GPL-[^[:space:]]*\)/\1 WITH Linux-syscall-note/g}' $file done After this patch is applied, there are 5 UAPI headers that do not contain "WITH Linux-syscall-note". They are kept untouched since this exception applies only to GPL variants. $ git grep --not -e Linux-syscall-note --and -e SPDX-License-Identifier \ -- :arch/*/include/uapi/asm/*.h :include/uapi/ :^*/Kbuild include/uapi/drm/panfrost_drm.h:/* SPDX-License-Identifier: MIT */ include/uapi/linux/batman_adv.h:/* SPDX-License-Identifier: MIT */ include/uapi/linux/qemu_fw_cfg.h:/* SPDX-License-Identifier: BSD-3-Clause */ include/uapi/linux/vbox_err.h:/* SPDX-License-Identifier: MIT */ include/uapi/linux/virtio_iommu.h:/* SPDX-License-Identifier: BSD-3-Clause */ Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-07-24Merge tag 'powerpc-5.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linuxLinus Torvalds14-25/+103
Pull powerpc fixes from Michael Ellerman: "An assortment of non-regression fixes that have accumulated since the start of the merge window. - A fix for a user triggerable oops on machines where transactional memory is disabled, eg. Power9 bare metal, Power8 with TM disabled on the command line, or all Power7 or earlier machines. - Three fixes for handling of PMU and power saving registers when running nested KVM on Power9. - Two fixes for bugs found while stress testing the XIVE interrupt controller code, also on Power9. - A fix to allow guests to boot under Qemu/KVM on Power9 using the the Hash MMU with >= 1TB of memory. - Two fixes for bugs in the recent DMA cleanup, one of which could lead to checkstops. - And finally three fixes for the PAPR SCM nvdimm driver. Thanks to: Alexey Kardashevskiy, Andrea Arcangeli, Cédric Le Goater, Christoph Hellwig, David Gibson, Gautham R. Shenoy, Michael Neuling, Oliver O'Halloran, Satheesh Rajendran, Shawn Anastasio, Suraj Jitindar Singh, Vaibhav Jain" * tag 'powerpc-5.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: powerpc/papr_scm: Force a scm-unbind if initial scm-bind fails powerpc/papr_scm: Update drc_pmem_unbind() to use H_SCM_UNBIND_ALL powerpc/pseries: Update SCM hcall op-codes in hvcall.h powerpc/tm: Fix oops on sigreturn on systems without TM powerpc/dma: Fix invalid DMA mmap behavior KVM: PPC: Book3S HV: XIVE: fix rollback when kvmppc_xive_create fails powerpc/xive: Fix loop exit-condition in xive_find_target_in_mask() powerpc: fix off by one in max_zone_pfn initialization for ZONE_DMA KVM: PPC: Book3S HV: Save and restore guest visible PSSCR bits on pseries powerpc/pmu: Set pmcregs_in_use in paca when running as LPAR KVM: PPC: Book3S HV: Always save guest pmu for guest capable of nesting powerpc/mm: Limit rma_size to 1TB when running without HV mode
2019-07-24Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds1-1/+1
Pull KVM fixes from Paolo Bonzini: "Bugfixes, a pvspinlock optimization, and documentation moving" * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: KVM: X86: Boost queue head vCPU to mitigate lock waiter preemption Documentation: move Documentation/virtual to Documentation/virt KVM: nVMX: Set cached_vmcs12 and cached_shadow_vmcs12 NULL after free KVM: X86: Dynamically allocate user_fpu KVM: X86: Fix fpu state crash in kvm guest Revert "kvm: x86: Use task structs fpu field for user" KVM: nVMX: Clear pending KVM_REQ_GET_VMCS12_PAGES when leaving nested
2019-07-24Documentation: move Documentation/virtual to Documentation/virtChristoph Hellwig1-1/+1
Renaming docs seems to be en vogue at the moment, so fix on of the grossly misnamed directories. We usually never use "virtual" as a shortcut for virtualization in the kernel, but always virt, as seen in the virt/ top-level directory. Fix up the documentation to match that. Fixes: ed16648eb5b8 ("Move kvm, uml, and lguest subdirectories under a common "virtual" directory, I.E:") Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2019-07-22Merge branch 'pdf_fixes_v1' of https://git.linuxtv.org/mchehab/experimental into mauroJonathan Corbet1-1/+1
Bring in a set of post-thrashup fixes from Mauro.
2019-07-22powerpc/papr_scm: Force a scm-unbind if initial scm-bind failsVaibhav Jain1-1/+14
In some cases initial bind of scm memory for an lpar can fail if previously it wasn't released using a scm-unbind hcall. This situation can arise due to panic of the previous kernel or forced lpar fadump. In such cases the H_SCM_BIND_MEM return a H_OVERLAP error. To mitigate such cases the patch updates papr_scm_probe() to force a call to drc_pmem_unbind() in case the initial bind of scm memory fails with EBUSY error. In case scm-bind operation again fails after the forced scm-unbind then we follow the existing error path. We also update drc_pmem_bind() to handle the H_OVERLAP error returned by phyp and indicate it as a EBUSY error back to the caller. Suggested-by: "Oliver O'Halloran" <oohall@gmail.com> Signed-off-by: Vaibhav Jain <vaibhav@linux.ibm.com> Reviewed-by: Oliver O'Halloran <oohall@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20190629160610.23402-4-vaibhav@linux.ibm.com
2019-07-22powerpc/papr_scm: Update drc_pmem_unbind() to use H_SCM_UNBIND_ALLVaibhav Jain1-7/+22
The new hcall named H_SCM_UNBIND_ALL has been introduce that can unbind all or specific scm memory assigned to an lpar. This is more efficient than using H_SCM_UNBIND_MEM as currently we don't support partial unbind of scm memory. Hence this patch proposes following changes to drc_pmem_unbind(): * Update drc_pmem_unbind() to replace hcall H_SCM_UNBIND_MEM to H_SCM_UNBIND_ALL. * Update drc_pmem_unbind() to handles cases when PHYP asks the guest kernel to wait for specific amount of time before retrying the hcall via the 'LONG_BUSY' return value. * Ensure appropriate error code is returned back from the function in case of an error. Reviewed-by: Oliver O'Halloran <oohall@gmail.com> Signed-off-by: Vaibhav Jain <vaibhav@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20190629160610.23402-3-vaibhav@linux.ibm.com
2019-07-22powerpc/pseries: Update SCM hcall op-codes in hvcall.hVaibhav Jain1-3/+8
Update the hvcalls.h to include op-codes for new hcalls introduce to manage SCM memory. Also update existing hcall definitions to reflect current papr specification for SCM. The removed hcall op-codes H_SCM_MEM_QUERY, H_SCM_BLOCK_CLEAR were transient proposals and there support was never implemented by Power-VM nor they were used anywhere in Linux kernel. Hence we don't expect anyone to be impacted by this change. Signed-off-by: Vaibhav Jain <vaibhav@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20190629160610.23402-2-vaibhav@linux.ibm.com
2019-07-22powerpc/tm: Fix oops on sigreturn on systems without TMMichael Neuling2-0/+8
On systems like P9 powernv where we have no TM (or P8 booted with ppc_tm=off), userspace can construct a signal context which still has the MSR TS bits set. The kernel tries to restore this context which results in the following crash: Unexpected TM Bad Thing exception at c0000000000022fc (msr 0x8000000102a03031) tm_scratch=800000020280f033 Oops: Unrecoverable exception, sig: 6 [#1] LE PAGE_SIZE=64K MMU=Hash SMP NR_CPUS=2048 NUMA pSeries Modules linked in: CPU: 0 PID: 1636 Comm: sigfuz Not tainted 5.2.0-11043-g0a8ad0ffa4 #69 NIP: c0000000000022fc LR: 00007fffb2d67e48 CTR: 0000000000000000 REGS: c00000003fffbd70 TRAP: 0700 Not tainted (5.2.0-11045-g7142b497d8) MSR: 8000000102a03031 <SF,VEC,VSX,FP,ME,IR,DR,LE,TM[E]> CR: 42004242 XER: 00000000 CFAR: c0000000000022e0 IRQMASK: 0 GPR00: 0000000000000072 00007fffb2b6e560 00007fffb2d87f00 0000000000000669 GPR04: 00007fffb2b6e728 0000000000000000 0000000000000000 00007fffb2b6f2a8 GPR08: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 GPR12: 0000000000000000 00007fffb2b76900 0000000000000000 0000000000000000 GPR16: 00007fffb2370000 00007fffb2d84390 00007fffea3a15ac 000001000a250420 GPR20: 00007fffb2b6f260 0000000010001770 0000000000000000 0000000000000000 GPR24: 00007fffb2d843a0 00007fffea3a14a0 0000000000010000 0000000000800000 GPR28: 00007fffea3a14d8 00000000003d0f00 0000000000000000 00007fffb2b6e728 NIP [c0000000000022fc] rfi_flush_fallback+0x7c/0x80 LR [00007fffb2d67e48] 0x7fffb2d67e48 Call Trace: Instruction dump: e96a0220 e96a02a8 e96a0330 e96a03b8 394a0400 4200ffdc 7d2903a6 e92d0c00 e94d0c08 e96d0c10 e82d0c18 7db242a6 <4c000024> 7db243a6 7db142a6 f82d0c18 The problem is the signal code assumes TM is enabled when CONFIG_PPC_TRANSACTIONAL_MEM is enabled. This may not be the case as with P9 powernv or if `ppc_tm=off` is used on P8. This means any local user can crash the system. Fix the problem by returning a bad stack frame to the user if they try to set the MSR TS bits with sigreturn() on systems where TM is not supported. Found with sigfuz kernel selftest on P9. This fixes CVE-2019-13648. Fixes: 2b0a576d15e0 ("powerpc: Add new transactional memory state to the signal context") Cc: stable@vger.kernel.org # v3.9 Reported-by: Praveen Pandey <Praveen.Pandey@in.ibm.com> Signed-off-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20190719050502.405-1-mikey@neuling.org
2019-07-19powerpc/dma: Fix invalid DMA mmap behaviorShawn Anastasio3-1/+20
The refactor of powerpc DMA functions in commit 6666cc17d780 ("powerpc/dma: remove dma_nommu_mmap_coherent") incorrectly changes the way DMA mappings are handled on powerpc. Since this change, all mapped pages are marked as cache-inhibited through the default implementation of arch_dma_mmap_pgprot. This differs from the previous behavior of only marking pages in noncoherent mappings as cache-inhibited and has resulted in sporadic system crashes in certain hardware configurations and workloads (see Bugzilla). This commit restores the previous correct behavior by providing an implementation of arch_dma_mmap_pgprot that only marks pages in noncoherent mappings as cache-inhibited. As this behavior should be universal for all powerpc platforms a new file, dma-generic.c, was created to store it. Fixes: 6666cc17d780 ("powerpc/dma: remove dma_nommu_mmap_coherent") # NOTE: fixes commit 6666cc17d780 released in v5.1. # Consider a stable tag: # Cc: stable@vger.kernel.org # v5.1+ # NOTE: fixes commit 6666cc17d780 released in v5.1. # Consider a stable tag: # Cc: stable@vger.kernel.org # v5.1+ Cc: stable@vger.kernel.org # v5.1+ Signed-off-by: Shawn Anastasio <shawn@anastas.io> Reviewed-by: Alexey Kardashevskiy <aik@ozlabs.ru> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20190717235437.12908-1-shawn@anastas.io
2019-07-19KVM: PPC: Book3S HV: XIVE: fix rollback when kvmppc_xive_create failsCédric Le Goater2-5/+3
The XIVE device structure is now allocated in kvmppc_xive_get_device() and kfree'd in kvmppc_core_destroy_vm(). In case of an OPAL error when allocating the XIVE VPs, the kfree() call in kvmppc_xive_*create() will result in a double free and corrupt the host memory. Fixes: 5422e95103cf ("KVM: PPC: Book3S HV: XIVE: Replace the 'destroy' method by a 'release' method") Cc: stable@vger.kernel.org # v5.2+ Signed-off-by: Cédric Le Goater <clg@kaod.org> Tested-by: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/6ea6998b-a890-2511-01d1-747d7621eb19@kaod.org
2019-07-18mm/memory_hotplug: rename walk_memory_range() and pass start+size instead of pfnsDavid Hildenbrand1-12/+11
walk_memory_range() was once used to iterate over sections. Now, it iterates over memory blocks. Rename the function, fixup the documentation. Also, pass start+size instead of PFNs, which is what most callers already have at hand. (we'll rework link_mem_sections() most probably soon) Follow-up patches will rework, simplify, and move walk_memory_blocks() to drivers/base/memory.c. Note: walk_memory_blocks() only works correctly right now if the start_pfn is aligned to a section start. This is the case right now, but we'll generalize the function in a follow up patch so the semantics match the documentation. [akpm@linux-foundation.org: remove unused variable] Link: http://lkml.kernel.org/r/20190614100114.311-5-david@redhat.com Signed-off-by: David Hildenbrand <david@redhat.com> Reviewed-by: Andrew Morton <akpm@linux-foundation.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net> Cc: Len Brown <lenb@kernel.org> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: David Hildenbrand <david@redhat.com> Cc: Rashmica Gupta <rashmica.g@gmail.com> Cc: Pavel Tatashin <pasha.tatashin@soleen.com> Cc: Anshuman Khandual <anshuman.khandual@arm.com> Cc: Michael Neuling <mikey@neuling.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Oscar Salvador <osalvador@suse.de> Cc: Michal Hocko <mhocko@suse.com> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Juergen Gross <jgross@suse.com> Cc: Qian Cai <cai@lca.pw> Cc: Arun KS <arunks@codeaurora.org> Cc: Nick Desaulniers <ndesaulniers@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-07-18mm/memory_hotplug: allow arch_remove_memory() without CONFIG_MEMORY_HOTREMOVEDavid Hildenbrand1-2/+0
We want to improve error handling while adding memory by allowing to use arch_remove_memory() and __remove_pages() even if CONFIG_MEMORY_HOTREMOVE is not set to e.g., implement something like: arch_add_memory() rc = do_something(); if (rc) { arch_remove_memory(); } We won't get rid of CONFIG_MEMORY_HOTREMOVE for now, as it will require quite some dependencies for memory offlining. Link: http://lkml.kernel.org/r/20190527111152.16324-7-david@redhat.com Signed-off-by: David Hildenbrand <david@redhat.com> Reviewed-by: Pavel Tatashin <pasha.tatashin@soleen.com> Cc: Tony Luck <tony.luck@intel.com> Cc: Fenghua Yu <fenghua.yu@intel.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Cc: Rich Felker <dalias@libc.org> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Borislav Petkov <bp@alien8.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: "Rafael J. Wysocki" <rafael@kernel.org> Cc: Michal Hocko <mhocko@suse.com> Cc: David Hildenbrand <david@redhat.com> Cc: Oscar Salvador <osalvador@suse.com> Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> Cc: Alex Deucher <alexander.deucher@amd.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Mark Brown <broonie@kernel.org> Cc: Chris Wilson <chris@chris-wilson.co.uk> Cc: Christophe Leroy <christophe.leroy@c-s.fr> Cc: Nicholas Piggin <npiggin@gmail.com> Cc: Vasily Gorbik <gor@linux.ibm.com> Cc: Rob Herring <robh@kernel.org> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: "mike.travis@hpe.com" <mike.travis@hpe.com> Cc: Andrew Banman <andrew.banman@hpe.com> Cc: Arun KS <arunks@codeaurora.org> Cc: Qian Cai <cai@lca.pw> Cc: Mathieu Malaterre <malat@debian.org> Cc: Baoquan He <bhe@redhat.com> Cc: Logan Gunthorpe <logang@deltatee.com> Cc: Anshuman Khandual <anshuman.khandual@arm.com> Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Chintan Pandya <cpandya@codeaurora.org> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jonathan Cameron <Jonathan.Cameron@huawei.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Jun Yao <yaojun8558363@gmail.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Mike Rapoport <rppt@linux.vnet.ibm.com> Cc: Oscar Salvador <osalvador@suse.de> Cc: Robin Murphy <robin.murphy@arm.com> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Will Deacon <will.deacon@arm.com> Cc: Yu Zhao <yuzhao@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-07-18powerpc/xive: Fix loop exit-condition in xive_find_target_in_mask()Gautham R. Shenoy1-4/+3
xive_find_target_in_mask() has the following for(;;) loop which has a bug when @first == cpumask_first(@mask) and condition 1 fails to hold for every CPU in @mask. In this case we loop forever in the for-loop. first = cpu; for (;;) { if (cpu_online(cpu) && xive_try_pick_target(cpu)) // condition 1 return cpu; cpu = cpumask_next(cpu, mask); if (cpu == first) // condition 2 break; if (cpu >= nr_cpu_ids) // condition 3 cpu = cpumask_first(mask); } This is because, when @first == cpumask_first(@mask), we never hit the condition 2 (cpu == first) since prior to this check, we would have executed "cpu = cpumask_next(cpu, mask)" which will set the value of @cpu to a value greater than @first or to nr_cpus_ids. When this is coupled with the fact that condition 1 is not met, we will never exit this loop. This was discovered by the hard-lockup detector while running LTP test concurrently with SMT switch tests. watchdog: CPU 12 detected hard LOCKUP on other CPUs 68 watchdog: CPU 12 TB:85587019220796, last SMP heartbeat TB:85578827223399 (15999ms ago) watchdog: CPU 68 Hard LOCKUP watchdog: CPU 68 TB:85587019361273, last heartbeat TB:85576815065016 (19930ms ago) CPU: 68 PID: 45050 Comm: hxediag Kdump: loaded Not tainted 4.18.0-100.el8.ppc64le #1 NIP: c0000000006f5578 LR: c000000000cba9ec CTR: 0000000000000000 REGS: c000201fff3c7d80 TRAP: 0100 Not tainted (4.18.0-100.el8.ppc64le) MSR: 9000000002883033 <SF,HV,VEC,VSX,FP,ME,IR,DR,RI,LE> CR: 24028424 XER: 00000000 CFAR: c0000000006f558c IRQMASK: 1 GPR00: c0000000000afc58 c000201c01c43400 c0000000015ce500 c000201cae26ec18 GPR04: 0000000000000800 0000000000000540 0000000000000800 00000000000000f8 GPR08: 0000000000000020 00000000000000a8 0000000080000000 c00800001a1beed8 GPR12: c0000000000b1410 c000201fff7f4c00 0000000000000000 0000000000000000 GPR16: 0000000000000000 0000000000000000 0000000000000540 0000000000000001 GPR20: 0000000000000048 0000000010110000 c00800001a1e3780 c000201cae26ed18 GPR24: 0000000000000000 c000201cae26ed8c 0000000000000001 c000000001116bc0 GPR28: c000000001601ee8 c000000001602494 c000201cae26ec18 000000000000001f NIP [c0000000006f5578] find_next_bit+0x38/0x90 LR [c000000000cba9ec] cpumask_next+0x2c/0x50 Call Trace: [c000201c01c43400] [c000201cae26ec18] 0xc000201cae26ec18 (unreliable) [c000201c01c43420] [c0000000000afc58] xive_find_target_in_mask+0x1b8/0x240 [c000201c01c43470] [c0000000000b0228] xive_pick_irq_target.isra.3+0x168/0x1f0 [c000201c01c435c0] [c0000000000b1470] xive_irq_startup+0x60/0x260 [c000201c01c43640] [c0000000001d8328] __irq_startup+0x58/0xf0 [c000201c01c43670] [c0000000001d844c] irq_startup+0x8c/0x1a0 [c000201c01c436b0] [c0000000001d57b0] __setup_irq+0x9f0/0xa90 [c000201c01c43760] [c0000000001d5aa0] request_threaded_irq+0x140/0x220 [c000201c01c437d0] [c00800001a17b3d4] bnx2x_nic_load+0x188c/0x3040 [bnx2x] [c000201c01c43950] [c00800001a187c44] bnx2x_self_test+0x1fc/0x1f70 [bnx2x] [c000201c01c43a90] [c000000000adc748] dev_ethtool+0x11d8/0x2cb0 [c000201c01c43b60] [c000000000b0b61c] dev_ioctl+0x5ac/0xa50 [c000201c01c43bf0] [c000000000a8d4ec] sock_do_ioctl+0xbc/0x1b0 [c000201c01c43c60] [c000000000a8dfb8] sock_ioctl+0x258/0x4f0 [c000201c01c43d20] [c0000000004c9704] do_vfs_ioctl+0xd4/0xa70 [c000201c01c43de0] [c0000000004ca274] sys_ioctl+0xc4/0x160 [c000201c01c43e30] [c00000000000b388] system_call+0x5c/0x70 Instruction dump: 78aad182 54a806be 3920ffff 78a50664 794a1f24 7d294036 7d43502a 7d295039 4182001c 48000034 78a9d182 79291f24 <7d23482a> 2fa90000 409e0020 38a50040 To fix this, move the check for condition 2 after the check for condition 3, so that we are able to break out of the loop soon after iterating through all the CPUs in the @mask in the problem case. Use do..while() to achieve this. Fixes: 243e25112d06 ("powerpc/xive: Native exploitation of the XIVE interrupt controller") Cc: stable@vger.kernel.org # v4.12+ Reported-by: Indira P. Joga <indira.priya@in.ibm.com> Signed-off-by: Gautham R. Shenoy <ego@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/1563359724-13931-1-git-send-email-ego@linux.vnet.ibm.com
2019-07-17Merge branch 'akpm' (patches from Andrew)Linus Torvalds8-105/+27
Merge more updates from Andrew Morton: "VM: - z3fold fixes and enhancements by Henry Burns and Vitaly Wool - more accurate reclaimed slab caches calculations by Yafang Shao - fix MAP_UNINITIALIZED UAPI symbol to not depend on config, by Christoph Hellwig - !CONFIG_MMU fixes by Christoph Hellwig - new novmcoredd parameter to omit device dumps from vmcore, by Kairui Song - new test_meminit module for testing heap and pagealloc initialization, by Alexander Potapenko - ioremap improvements for huge mappings, by Anshuman Khandual - generalize kprobe page fault handling, by Anshuman Khandual - device-dax hotplug fixes and improvements, by Pavel Tatashin - enable synchronous DAX fault on powerpc, by Aneesh Kumar K.V - add pte_devmap() support for arm64, by Robin Murphy - unify locked_vm accounting with a helper, by Daniel Jordan - several misc fixes core/lib: - new typeof_member() macro including some users, by Alexey Dobriyan - make BIT() and GENMASK() available in asm, by Masahiro Yamada - changed LIST_POISON2 on x86_64 to 0xdead000000000122 for better code generation, by Alexey Dobriyan - rbtree code size optimizations, by Michel Lespinasse - convert struct pid count to refcount_t, by Joel Fernandes get_maintainer.pl: - add --no-moderated switch to skip moderated ML's, by Joe Perches misc: - ptrace PTRACE_GET_SYSCALL_INFO interface - coda updates - gdb scripts, various" [ Using merge message suggestion from Vlastimil Babka, with some editing - Linus ] * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (100 commits) fs/select.c: use struct_size() in kmalloc() mm: add account_locked_vm utility function arm64: mm: implement pte_devmap support mm: introduce ARCH_HAS_PTE_DEVMAP mm: clean up is_device_*_page() definitions mm/mmap: move common defines to mman-common.h mm: move MAP_SYNC to asm-generic/mman-common.h device-dax: "Hotremove" persistent memory that is used like normal RAM mm/hotplug: make remove_memory() interface usable device-dax: fix memory and resource leak if hotplug fails include/linux/lz4.h: fix spelling and copy-paste errors in documentation ipc/mqueue.c: only perform resource calculation if user valid include/asm-generic/bug.h: fix "cut here" for WARN_ON for __WARN_TAINT architectures scripts/gdb: add helpers to find and list devices scripts/gdb: add lx-genpd-summary command drivers/pps/pps.c: clear offset flags in PPS_SETPARAMS ioctl kernel/pid.c: convert struct pid count to refcount_t drivers/rapidio/devices/rio_mport_cdev.c: NUL terminate some strings select: shift restore_saved_sigmask_unless() into poll_select_copy_remaining() select: change do_poll() to return -ERESTARTNOHAND rather than -EINTR ...
2019-07-17docs: powerpc: convert docs to ReST and rename to *.rstMauro Carvalho Chehab1-1/+1
Convert docs to ReST and add them to the arch-specific book. The conversion here was trivial, as almost every file there was already using an elegant format close to ReST standard. The changes were mostly to mark literal blocks and add a few missing section title identifiers. One note with regards to "--": on Sphinx, this can't be used to identify a list, as it will format it badly. This can be used, however, to identify a long hyphen - and "---" is an even longer one. At its new index.rst, let's add a :orphan: while this is not linked to the main index.rst file, in order to avoid build warnings. Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org> Acked-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com> # cxl
2019-07-16mm: add account_locked_vm utility functionDaniel Jordan2-77/+8
locked_vm accounting is done roughly the same way in five places, so unify them in a helper. Include the helper's caller in the debug print to distinguish between callsites. Error codes stay the same, so user-visible behavior does too. The one exception is that the -EPERM case in tce_account_locked_vm is removed because Alexey has never seen it triggered. [daniel.m.jordan@oracle.com: v3] Link: http://lkml.kernel.org/r/20190529205019.20927-1-daniel.m.jordan@oracle.com [sfr@canb.auug.org.au: fix mm/util.c] Link: http://lkml.kernel.org/r/20190524175045.26897-1-daniel.m.jordan@oracle.com Signed-off-by: Daniel Jordan <daniel.m.jordan@oracle.com> Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Tested-by: Alexey Kardashevskiy <aik@ozlabs.ru> Acked-by: Alex Williamson <alex.williamson@redhat.com> Cc: Alan Tull <atull@kernel.org> Cc: Alex Williamson <alex.williamson@redhat.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Christoph Lameter <cl@linux.com> Cc: Christophe Leroy <christophe.leroy@c-s.fr> Cc: Davidlohr Bueso <dave@stgolabs.net> Cc: Jason Gunthorpe <jgg@mellanox.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Moritz Fischer <mdf@kernel.org> Cc: Paul Mackerras <paulus@ozlabs.org> Cc: Steve Sistare <steven.sistare@oracle.com> Cc: Wu Hao <hao.wu@intel.com> Cc: Ira Weiny <ira.weiny@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-07-16mm: introduce ARCH_HAS_PTE_DEVMAPRobin Murphy2-2/+1
ARCH_HAS_ZONE_DEVICE is somewhat meaningless in itself, and combined with the long-out-of-date comment can lead to the impression than an architecture may just enable it (since __add_pages() now "comprehends device memory" for itself) and expect things to work. In practice, however, ZONE_DEVICE users have little chance of functioning correctly without __HAVE_ARCH_PTE_DEVMAP, so let's clean that up the same way as ARCH_HAS_PTE_SPECIAL and make it the proper dependency so the real situation is clearer. Link: http://lkml.kernel.org/r/87554aa78478a02a63f2c4cf60a847279ae3eb3b.1558547956.git.robin.murphy@arm.com Signed-off-by: Robin Murphy <robin.murphy@arm.com> Acked-by: Dan Williams <dan.j.williams@intel.com> Reviewed-by: Ira Weiny <ira.weiny@intel.com> Acked-by: Oliver O'Halloran <oohall@gmail.com> Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: David Hildenbrand <david@redhat.com> Cc: Jerome Glisse <jglisse@redhat.com> Cc: Michal Hocko <mhocko@suse.com> Cc: Will Deacon <will.deacon@arm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-07-16mm/mmap: move common defines to mman-common.hAneesh Kumar K.V1-5/+1
Two architecture that use arch specific MMAP flags are powerpc and sparc. We still have few flag values common across them and other architectures. Consolidate this in mman-common.h. Also update the comment to indicate where to find HugeTLB specific reserved values Link: http://lkml.kernel.org/r/20190604090950.31417-1-aneesh.kumar@linux.ibm.com Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> Reviewed-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-07-16powerpc: define syscall_get_error()Dmitry V. Levin1-0/+10
syscall_get_error() is required to be implemented on this architecture in addition to already implemented syscall_get_nr(), syscall_get_arguments(), syscall_get_return_value(), and syscall_get_arch() functions in order to extend the generic ptrace API with PTRACE_GET_SYSCALL_INFO request. Link: http://lkml.kernel.org/r/20190510152824.GE28558@altlinux.org Signed-off-by: Dmitry V. Levin <ldv@altlinux.org> Acked-by: Michael Ellerman <mpe@ellerman.id.au> Cc: Elvira Khabirova <lineprinter@altlinux.org> Cc: Eugene Syromyatnikov <esyr@redhat.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Greentime Hu <greentime@andestech.com> Cc: Helge Deller <deller@gmx.de> [parisc] Cc: James E.J. Bottomley <jejb@parisc-linux.org> Cc: James Hogan <jhogan@kernel.org> Cc: kbuild test robot <lkp@intel.com> Cc: Kees Cook <keescook@chromium.org> Cc: Paul Burton <paul.burton@mips.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Richard Kuo <rkuo@codeaurora.org> Cc: Shuah Khan <shuah@kernel.org> Cc: Vincent Chen <deanbo422@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-07-16mm, kprobes: generalize and rename notify_page_fault() as kprobe_page_fault()Anshuman Khandual1-21/+2
Architectures which support kprobes have very similar boilerplate around calling kprobe_fault_handler(). Use a helper function in kprobes.h to unify them, based on the x86 code. This changes the behaviour for other architectures when preemption is enabled. Previously, they would have disabled preemption while calling the kprobe handler. However, preemption would be disabled if this fault was due to a kprobe, so we know the fault was not due to a kprobe handler and can simply return failure. This behaviour was introduced in commit a980c0ef9f6d ("x86/kprobes: Refactor kprobes_fault() like kprobe_exceptions_notify()") [anshuman.khandual@arm.com: export kprobe_fault_handler()] Link: http://lkml.kernel.org/r/1561133358-8876-1-git-send-email-anshuman.khandual@arm.com Link: http://lkml.kernel.org/r/1560420444-25737-1-git-send-email-anshuman.khandual@arm.com Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com> Reviewed-by: Dave Hansen <dave.hansen@linux.intel.com> Cc: Michal Hocko <mhocko@suse.com> Cc: Matthew Wilcox <willy@infradead.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Christophe Leroy <christophe.leroy@c-s.fr> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Cc: Andrey Konovalov <andreyknvl@google.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Paul Mackerras <paulus@samba.org> Cc: Russell King <linux@armlinux.org.uk> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Will Deacon <will.deacon@arm.com> Cc: Tony Luck <tony.luck@intel.com> Cc: Fenghua Yu <fenghua.yu@intel.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Cc: "David S. Miller" <davem@davemloft.net> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Vineet Gupta <vgupta@synopsys.com> Cc: James Hogan <jhogan@kernel.org> Cc: Paul Burton <paul.burton@mips.com> Cc: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-07-16mm/ioremap: probe platform for p4d huge map supportAnshuman Khandual1-0/+5
Finish up what commit c2febafc6773 ("mm: convert generic code to 5-level paging") started while levelling up P4D huge mapping support at par with PUD and PMD. A new arch call back arch_ioremap_p4d_supported() is added which just maintains status quo (P4D huge map not supported) on x86, arm64 and powerpc. When HAVE_ARCH_HUGE_VMAP is enabled its just a simple check from the arch about the support, hence runtime effects are minimal. Link: http://lkml.kernel.org/r/1561699231-20991-1-git-send-email-anshuman.khandual@arm.com Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com> Acked-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc) Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Will Deacon <will.deacon@arm.com> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Michal Hocko <mhocko@kernel.org> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-07-16Merge tag 'for-linus-20190715' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linuxLinus Torvalds1-0/+1
Pull pidfd and clone3 fixes from Christian Brauner: "This contains a bugfix for CLONE_PIDFD when used with the legacy clone syscall, two fixes to ensure that syscall numbering and clone3 entrypoint implementations will stay consistent, and an update for the maintainers file: - The addition of clone3 broke CLONE_PIDFD for legacy clone on all architectures that use do_fork() directly instead of calling the clone syscall itself. (Fwiw, cleaning do_fork() up is on my todo.) The reason this happened was that during conversion of _do_fork() to use struct kernel_clone_args we missed that do_fork() is called directly by various architectures. This is fixed by making sure that the pidfd argument in struct kernel_clone_args is correctly initialized with the parent_tidptr argument passed down from do_fork(). Additionally, do_fork() missed a check to make CLONE_PIDFD and CLONE_PARENT_SETTID mutually exclusive just a clone() does. This is now fixed too. - When clone3() was introduced we skipped architectures that require special handling for fork-like syscalls. Their syscall tables did not contain any mention of clone3(). To make sure that Arnd's work to make syscall numbers on all architectures identical (minus alpha) was not for naught we are placing a comment in all syscall tables that do not yet implement clone3(). The comment makes it clear that 435 is reserved for clone3 and should not be used. - Also, this contains a patch to make the clone3() syscall definition in asm-generic/unist.h conditional on __ARCH_WANT_SYS_CLONE3. This lets us catch new architectures that implicitly make use of clone3 without setting __ARCH_WANT_SYS_CLONE3 which is a good indicator that they did not check whether it needs special treatment or not. - Finally, this contains a patch to add me as maintainer for pidfd stuff so people can start blaming me (more)" * tag 'for-linus-20190715' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux: MAINTAINERS: add new entry for pidfd api unistd: protect clone3 via __ARCH_WANT_SYS_CLONE3 arch: mark syscall number 435 reserved for clone3 clone: fix CLONE_PIDFD support
2019-07-15powerpc: fix off by one in max_zone_pfn initialization for ZONE_DMAAndrea Arcangeli1-1/+1
25078dc1f74be16b858e914f52cc8f4d03c2271a first introduced an off by one error in the ZONE_DMA initialization of PPC_BOOK3E_64=y and since 9739ab7eda459f0669ec9807e0d9be5020bab88c the off by one applies to PPC32=y too. This simply corrects the off by one and should resolve crashes like below: [ 65.179101] page 0x7fff outside node 0 zone DMA [ 0x0 - 0x7fff ] Unfortunately in various MM places "max" means a non inclusive end of range. free_area_init_nodes max_zone_pfn parameter is one case and MAX_ORDER is another one (unrelated) that comes by memory. Reported-by: Zorro Lang <zlang@redhat.com> Fixes: 25078dc1f74b ("powerpc: use mm zones more sensibly") Fixes: 9739ab7eda45 ("powerpc: enable a 30-bit ZONE_DMA for 32-bit pmac") Signed-off-by: Andrea Arcangeli <aarcange@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20190625141727.2883-1-aarcange@redhat.com
2019-07-15KVM: PPC: Book3S HV: Save and restore guest visible PSSCR bits on pseriesSuraj Jitindar Singh1-0/+11
The Performance Stop Status and Control Register (PSSCR) is used to control the power saving facilities of the processor. This register has various fields, some of which can be modified only in hypervisor state, and others which can be modified in both hypervisor and privileged non-hypervisor state. The bits which can be modified in privileged non-hypervisor state are referred to as guest visible. Currently the L0 hypervisor saves and restores both it's own host value as well as the guest value of the PSSCR when context switching between the hypervisor and guest. However a nested hypervisor running it's own nested guests (as indicated by kvmhv_on_pseries()) doesn't context switch the PSSCR register. That means if a nested (L2) guest modifies the PSSCR then the L1 guest hypervisor will run with that modified value, and if the L1 guest hypervisor modifies the PSSCR and then goes to run the nested (L2) guest again then the L2 PSSCR value will be lost. Fix this by having the (L1) nested hypervisor save and restore both its host and the guest PSSCR value when entering and exiting a nested (L2) guest. Note that only the guest visible parts of the PSSCR are context switched since this is all the L1 nested hypervisor can access, this is fine however as these are the only fields the L0 hypervisor provides guest control of anyway and so all other fields are ignored. This could also have been implemented by adding the PSSCR register to the hv_regs passed to the L0 hypervisor as input to the H_ENTER_NESTED hcall, however this would have meant updating the structure layout and thus required modifications to both the L0 and L1 kernels. Whereas the approach used doesn't require L0 kernel modifications while achieving the same result. Fixes: 95a6432ce903 ("KVM: PPC: Book3S HV: Streamlined guest entry/exit path on P9 for radix guests") Cc: stable@vger.kernel.org # v4.20+ Signed-off-by: Suraj Jitindar Singh <sjitindarsingh@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20190703012022.15644-3-sjitindarsingh@gmail.com
2019-07-14Merge tag 'for-linus-hmm' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdmaLinus Torvalds1-9/+1
Pull HMM updates from Jason Gunthorpe: "Improvements and bug fixes for the hmm interface in the kernel: - Improve clarity, locking and APIs related to the 'hmm mirror' feature merged last cycle. In linux-next we now see AMDGPU and nouveau to be using this API. - Remove old or transitional hmm APIs. These are hold overs from the past with no users, or APIs that existed only to manage cross tree conflicts. There are still a few more of these cleanups that didn't make the merge window cut off. - Improve some core mm APIs: - export alloc_pages_vma() for driver use - refactor into devm_request_free_mem_region() to manage DEVICE_PRIVATE resource reservations - refactor duplicative driver code into the core dev_pagemap struct - Remove hmm wrappers of improved core mm APIs, instead have drivers use the simplified API directly - Remove DEVICE_PUBLIC - Simplify the kconfig flow for the hmm users and core code" * tag 'for-linus-hmm' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma: (42 commits) mm: don't select MIGRATE_VMA_HELPER from HMM_MIRROR mm: remove the HMM config option mm: sort out the DEVICE_PRIVATE Kconfig mess mm: simplify ZONE_DEVICE page private data mm: remove hmm_devmem_add mm: remove hmm_vma_alloc_locked_page nouveau: use devm_memremap_pages directly nouveau: use alloc_page_vma directly PCI/P2PDMA: use the dev_pagemap internal refcount device-dax: use the dev_pagemap internal refcount memremap: provide an optional internal refcount in struct dev_pagemap memremap: replace the altmap_valid field with a PGMAP_ALTMAP_VALID flag memremap: remove the data field in struct dev_pagemap memremap: add a migrate_to_ram method to struct dev_pagemap_ops memremap: lift the devmap_enable manipulation into devm_memremap_pages memremap: pass a struct dev_pagemap to ->kill and ->cleanup memremap: move dev_pagemap callbacks into a separate structure memremap: validate the pagemap type passed to devm_memremap_pages mm: factor out a devm_request_free_mem_region helper mm: export alloc_pages_vma ...
2019-07-15powerpc/pmu: Set pmcregs_in_use in paca when running as LPARSuraj Jitindar Singh1-3/+2
The ability to run nested guests under KVM means that a guest can also act as a hypervisor for it's own nested guest. Currently ppc_set_pmu_inuse() assumes that either FW_FEATURE_LPAR is set, indicating a guest environment, and so sets the pmcregs_in_use flag in the lppaca, or that it isn't set, indicating a hypervisor environment, and so sets the pmcregs_in_use flag in the paca. The pmcregs_in_use flag in the lppaca is used to communicate this information to a hypervisor and so must be set in a guest environment. The pmcregs_in_use flag in the paca is used by KVM code to determine whether the host state of the performance monitoring unit (PMU) must be saved and restored when running a guest. Thus when a guest also acts as a hypervisor it must set this bit in both places since it needs to ensure both that the real hypervisor saves it's PMU registers when it runs (requires pmcregs_in_use flag in lppaca), and that it saves it's own PMU registers when running a nested guest (requires pmcregs_in_use flag in paca). Modify ppc_set_pmu_inuse() so that the pmcregs_in_use bit is set in both the lppaca and the paca when a guest (LPAR) is running with the capability of running it's own guests (CONFIG_KVM_BOOK3S_HV_POSSIBLE). Fixes: 95a6432ce903 ("KVM: PPC: Book3S HV: Streamlined guest entry/exit path on P9 for radix guests") Cc: stable@vger.kernel.org # v4.20+ Signed-off-by: Suraj Jitindar Singh <sjitindarsingh@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20190703012022.15644-2-sjitindarsingh@gmail.com
2019-07-15KVM: PPC: Book3S HV: Always save guest pmu for guest capable of nestingSuraj Jitindar Singh1-0/+2
The performance monitoring unit (PMU) registers are saved on guest exit when the guest has set the pmcregs_in_use flag in its lppaca, if it exists, or unconditionally if it doesn't. If a nested guest is being run then the hypervisor doesn't, and in most cases can't, know if the PMU registers are in use since it doesn't know the location of the lppaca for the nested guest, although it may have one for its immediate guest. This results in the values of these registers being lost across nested guest entry and exit in the case where the nested guest was making use of the performance monitoring facility while it's nested guest hypervisor wasn't. Further more the hypervisor could interrupt a guest hypervisor between when it has loaded up the PMU registers and it calling H_ENTER_NESTED or between returning from the nested guest to the guest hypervisor and the guest hypervisor reading the PMU registers, in kvmhv_p9_guest_entry(). This means that it isn't sufficient to just save the PMU registers when entering or exiting a nested guest, but that it is necessary to always save the PMU registers whenever a guest is capable of running nested guests to ensure the register values aren't lost in the context switch. Ensure the PMU register values are preserved by always saving their value into the vcpu struct when a guest is capable of running nested guests. This should have minimal performance impact however any impact can be avoided by booting a guest with "-machine pseries,cap-nested-hv=false" on the qemu commandline. Fixes: 95a6432ce903 ("KVM: PPC: Book3S HV: Streamlined guest entry/exit path on P9 for radix guests") Cc: stable@vger.kernel.org # v4.20+ Signed-off-by: Suraj Jitindar Singh <sjitindarsingh@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20190703012022.15644-1-sjitindarsingh@gmail.com
2019-07-15powerpc/mm: Limit rma_size to 1TB when running without HV modeSuraj Jitindar Singh1-0/+9
The virtual real mode addressing (VRMA) mechanism is used when a partition is using HPT (Hash Page Table) translation and performs real mode accesses (MSR[IR|DR] = 0) in non-hypervisor mode. In this mode effective address bits 0:23 are treated as zero (i.e. the access is aliased to 0) and the access is performed using an implicit 1TB SLB entry. The size of the RMA (Real Memory Area) is communicated to the guest as the size of the first memory region in the device tree. And because of the mechanism described above can be expected to not exceed 1TB. In the event that the host erroneously represents the RMA as being larger than 1TB, guest accesses in real mode to memory addresses above 1TB will be aliased down to below 1TB. This means that a memory access performed in real mode may differ to one performed in virtual mode for the same memory address, which would likely have unintended consequences. To avoid this outcome have the guest explicitly limit the size of the RMA to the current maximum, which is 1TB. This means that even if the first memory block is larger than 1TB, only the first 1TB should be accessed in real mode. Fixes: c610d65c0ad0 ("powerpc/pseries: lift RTAS limit for hash") Cc: stable@vger.kernel.org # v4.16+ Signed-off-by: Suraj Jitindar Singh <sjitindarsingh@gmail.com> Tested-by: Satheesh Rajendran <sathnaga@linux.vnet.ibm.com> Reviewed-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20190710052018.14628-1-sjitindarsingh@gmail.com
2019-07-15arch: mark syscall number 435 reserved for clone3Christian Brauner1-0/+1
A while ago Arnd made it possible to give new system calls the same syscall number on all architectures (except alpha). To not break this nice new feature let's mark 435 for clone3 as reserved on all architectures that do not yet implement it. Even if an architecture does not plan to implement it this ensures that new system calls coming after clone3 will have the same number on all architectures. Signed-off-by: Christian Brauner <christian@brauner.io> Cc: linux-arch@vger.kernel.org Cc: linux-alpha@vger.kernel.org Cc: linux-kernel@vger.kernel.org Cc: linux-ia64@vger.kernel.org Cc: linux-m68k@lists.linux-m68k.org Cc: linux-mips@vger.kernel.org Cc: linux-parisc@vger.kernel.org Cc: linuxppc-dev@lists.ozlabs.org Cc: linux-s390@vger.kernel.org Cc: linux-sh@vger.kernel.org Cc: sparclinux@vger.kernel.org Link: https://lore.kernel.org/r/20190714192205.27190-2-christian@brauner.io Reviewed-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Christian Brauner <christian@brauner.io>
2019-07-13Merge tag 'powerpc-5.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linuxLinus Torvalds208-3498/+3362
Pull powerpc updates from Michael Ellerman: "Notable changes: - Removal of the NPU DMA code, used by the out-of-tree Nvidia driver, as well as some other functions only used by drivers that haven't (yet?) made it upstream. - A fix for a bug in our handling of hardware watchpoints (eg. perf record -e mem: ...) which could lead to register corruption and kernel crashes. - Enable HAVE_ARCH_HUGE_VMAP, which allows us to use large pages for vmalloc when using the Radix MMU. - A large but incremental rewrite of our exception handling code to use gas macros rather than multiple levels of nested CPP macros. And the usual small fixes, cleanups and improvements. Thanks to: Alastair D'Silva, Alexey Kardashevskiy, Andreas Schwab, Aneesh Kumar K.V, Anju T Sudhakar, Anton Blanchard, Arnd Bergmann, Athira Rajeev, Cédric Le Goater, Christian Lamparter, Christophe Leroy, Christophe Lombard, Christoph Hellwig, Daniel Axtens, Denis Efremov, Enrico Weigelt, Frederic Barrat, Gautham R. Shenoy, Geert Uytterhoeven, Geliang Tang, Gen Zhang, Greg Kroah-Hartman, Greg Kurz, Gustavo Romero, Krzysztof Kozlowski, Madhavan Srinivasan, Masahiro Yamada, Mathieu Malaterre, Michael Neuling, Nathan Lynch, Naveen N. Rao, Nicholas Piggin, Nishad Kamdar, Oliver O'Halloran, Qian Cai, Ravi Bangoria, Sachin Sant, Sam Bobroff, Satheesh Rajendran, Segher Boessenkool, Shaokun Zhang, Shawn Anastasio, Stewart Smith, Suraj Jitindar Singh, Thiago Jung Bauermann, YueHaibing" * tag 'powerpc-5.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (163 commits) powerpc/powernv/idle: Fix restore of SPRN_LDBAR for POWER9 stop state. powerpc/eeh: Handle hugepages in ioremap space ocxl: Update for AFU descriptor template version 1.1 powerpc/boot: pass CONFIG options in a simpler and more robust way powerpc/boot: add {get, put}_unaligned_be32 to xz_config.h powerpc/irq: Don't WARN continuously in arch_local_irq_restore() powerpc/module64: Use symbolic instructions names. powerpc/module32: Use symbolic instructions names. powerpc: Move PPC_HA() PPC_HI() and PPC_LO() to ppc-opcode.h powerpc/module64: Fix comment in R_PPC64_ENTRY handling powerpc/boot: Add lzo support for uImage powerpc/boot: Add lzma support for uImage powerpc/boot: don't force gzipped uImage powerpc/8xx: Add microcode patch to move SMC parameter RAM. powerpc/8xx: Use IO accessors in microcode programming. powerpc/8xx: replace #ifdefs by IS_ENABLED() in microcode.c powerpc/8xx: refactor programming of microcode CPM params. powerpc/8xx: refactor printing of microcode patch name. powerpc/8xx: Refactor microcode write powerpc/8xx: refactor writing of CPM microcode arrays ...
2019-07-12Merge tag 'kbuild-v5.3' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuildLinus Torvalds1-0/+1
Pull Kbuild updates from Masahiro Yamada: - remove headers_{install,check}_all targets - remove unreasonable 'depends on !UML' from CONFIG_SAMPLES - re-implement 'make headers_install' more cleanly - add new header-test-y syntax to compile-test headers - compile-test exported headers to ensure they are compilable in user-space - compile-test headers under include/ to ensure they are self-contained - remove -Waggregate-return, -Wno-uninitialized, -Wno-unused-value flags - add -Werror=unknown-warning-option for Clang - add 128-bit built-in types support to genksyms - fix missed rebuild of modules.builtin - propagate 'No space left on device' error in fixdep to Make - allow Clang to use its integrated assembler - improve some coccinelle scripts - add a new flag KBUILD_ABS_SRCTREE to request Kbuild to use absolute path for $(srctree). - do not ignore errors when compression utility is missing - misc cleanups * tag 'kbuild-v5.3' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (49 commits) kbuild: use -- separater intead of $(filter-out ...) for cc-cross-prefix kbuild: Inform user to pass ARCH= for make mrproper kbuild: fix compression errors getting ignored kbuild: add a flag to force absolute path for srctree kbuild: replace KBUILD_SRCTREE with boolean building_out_of_srctree kbuild: remove src and obj from the top Makefile scripts/tags.sh: remove unused environment variables from comments scripts/tags.sh: drop SUBARCH support for ARM kbuild: compile-test kernel headers to ensure they are self-contained kheaders: include only headers into kheaders_data.tar.xz kheaders: remove meaningless -R option of 'ls' kbuild: support header-test-pattern-y kbuild: do not create wrappers for header-test-y kbuild: compile-test exported headers to ensure they are self-contained init/Kconfig: add CONFIG_CC_CAN_LINK kallsyms: exclude kasan local symbols on s390 kbuild: add more hints about SUBDIRS replacement coccinelle: api/stream_open: treat all wait_.*() calls as blocking coccinelle: put_device: Add a cast to an expression for an assignment coccinelle: put_device: Adjust a message construction ...
2019-07-12Merge tag 'asm-generic-5.3' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-genericLinus Torvalds1-7/+22
Pull asm-generic updates from Arnd Bergmann: "The asm-generic changes for 5.3 consist of a cleanup series to remove ptrace.h from Christoph Hellwig, who explains: 'asm-generic/ptrace.h is a little weird in that it doesn't actually implement any functionality, but it provided multiple layers of macros that just implement trivial inline functions. We implement those directly in the few architectures and be off with a much simpler design.' at https://lore.kernel.org/lkml/20190624054728.30966-1-hch@lst.de/" * tag 'asm-generic-5.3' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic: asm-generic: remove ptrace.h x86: don't use asm-generic/ptrace.h sh: don't use asm-generic/ptrace.h powerpc: don't use asm-generic/ptrace.h arm64: don't use asm-generic/ptrace.h
2019-07-12Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds1-2/+2
Pull KVM updates from Paolo Bonzini: "ARM: - support for chained PMU counters in guests - improved SError handling - handle Neoverse N1 erratum #1349291 - allow side-channel mitigation status to be migrated - standardise most AArch64 system register accesses to msr_s/mrs_s - fix host MPIDR corruption on 32bit - selftests ckleanups x86: - PMU event {white,black}listing - ability for the guest to disable host-side interrupt polling - fixes for enlightened VMCS (Hyper-V pv nested virtualization), - new hypercall to yield to IPI target - support for passing cstate MSRs through to the guest - lots of cleanups and optimizations Generic: - Some txt->rST conversions for the documentation" * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (128 commits) Documentation: virtual: Add toctree hooks Documentation: kvm: Convert cpuid.txt to .rst Documentation: virtual: Convert paravirt_ops.txt to .rst KVM: x86: Unconditionally enable irqs in guest context KVM: x86: PMU Event Filter kvm: x86: Fix -Wmissing-prototypes warnings KVM: Properly check if "page" is valid in kvm_vcpu_unmap KVM: arm/arm64: Initialise host's MPIDRs by reading the actual register KVM: LAPIC: Retry tune per-vCPU timer_advance_ns if adaptive tuning goes insane kvm: LAPIC: write down valid APIC registers KVM: arm64: Migrate _elx sysreg accessors to msr_s/mrs_s KVM: doc: Add API documentation on the KVM_REG_ARM_WORKAROUNDS register KVM: arm/arm64: Add save/restore support for firmware workaround state arm64: KVM: Propagate full Spectre v2 workaround state to KVM guests KVM: arm/arm64: Support chained PMU counters KVM: arm/arm64: Remove pmc->bitmask KVM: arm/arm64: Re-create event when setting counter value KVM: arm/arm64: Extract duplicated code to own function KVM: arm/arm64: Rename kvm_pmu_{enable/disable}_counter functions KVM: LAPIC: ARBPRI is a reserved register for x2APIC ...
2019-07-12Merge tag 'driver-core-5.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-coreLinus Torvalds1-2/+2
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 ...
2019-07-12Merge branch 'akpm' (patches from Andrew)Linus Torvalds4-74/+17
Merge updates from Andrew Morton: "Am experimenting with splitting MM up into identifiable subsystems perhaps with a view to gitifying it in complex ways. Also with more verbose "incoming" emails. Most of MM is here and a few other trees. Subsystems affected by this patch series: - hotfixes - iommu - scripts - arch/sh - ocfs2 - mm:slab-generic - mm:slub - mm:kmemleak - mm:kasan - mm:cleanups - mm:debug - mm:pagecache - mm:swap - mm:memcg - mm:gup - mm:pagemap - mm:infrastructure - mm:vmalloc - mm:initialization - mm:pagealloc - mm:vmscan - mm:tools - mm:proc - mm:ras - mm:oom-kill hotfixes: mm: vmscan: scan anonymous pages on file refaults mm/nvdimm: add is_ioremap_addr and use that to check ioremap address mm/memcontrol: fix wrong statistics in memory.stat mm/z3fold.c: lock z3fold page before __SetPageMovable() nilfs2: do not use unexported cpu_to_le32()/le32_to_cpu() in uapi header MAINTAINERS: nilfs2: update email address iommu: include/linux/dmar.h: replace single-char identifiers in macros scripts: scripts/decode_stacktrace: match basepath using shell prefix operator, not regex scripts/decode_stacktrace: look for modules with .ko.debug extension scripts/spelling.txt: drop "sepc" from the misspelling list scripts/spelling.txt: add spelling fix for prohibited scripts/decode_stacktrace: Accept dash/underscore in modules scripts/spelling.txt: add more spellings to spelling.txt arch/sh: arch/sh/configs/sdk7786_defconfig: remove CONFIG_LOGFS sh: config: remove left-over BACKLIGHT_LCD_SUPPORT sh: prevent warnings when using iounmap ocfs2: fs: ocfs: fix spelling mistake "hearbeating" -> "heartbeat" ocfs2/dlm: use struct_size() helper ocfs2: add last unlock times in locking_state ocfs2: add locking filter debugfs file ocfs2: add first lock wait time in locking_state ocfs: no need to check return value of debugfs_create functions fs/ocfs2/dlmglue.c: unneeded variable: "status" ocfs2: use kmemdup rather than duplicating its implementation mm:slab-generic: Patch series "mm/slab: Improved sanity checking": mm/slab: validate cache membership under freelist hardening mm/slab: sanity-check page type when looking up cache lkdtm/heap: add tests for freelist hardening mm:slub: mm/slub.c: avoid double string traverse in kmem_cache_flags() slub: don't panic for memcg kmem cache creation failure mm:kmemleak: mm/kmemleak.c: fix check for softirq context mm/kmemleak.c: change error at _write when kmemleak is disabled docs: kmemleak: add more documentation details mm:kasan: mm/kasan: print frame description for stack bugs Patch series "Bitops instrumentation for KASAN", v5: lib/test_kasan: add bitops tests x86: use static_cpu_has in uaccess region to avoid instrumentation asm-generic, x86: add bitops instrumentation for KASAN Patch series "mm/kasan: Add object validation in ksize()", v3: mm/kasan: introduce __kasan_check_{read,write} mm/kasan: change kasan_check_{read,write} to return boolean lib/test_kasan: Add test for double-kzfree detection mm/slab: refactor common ksize KASAN logic into slab_common.c mm/kasan: add object validation in ksize() mm:cleanups: include/linux/pfn_t.h: remove pfn_t_to_virt() Patch series "remove ARCH_SELECT_MEMORY_MODEL where it has no effect": arm: remove ARCH_SELECT_MEMORY_MODEL s390: remove ARCH_SELECT_MEMORY_MODEL sparc: remove ARCH_SELECT_MEMORY_MODEL mm/gup.c: make follow_page_mask() static mm/memory.c: trivial clean up in insert_page() mm: make !CONFIG_HUGE_PAGE wrappers into static inlines include/linux/mm_types.h: ifdef struct vm_area_struct::swap_readahead_info mm: remove the account_page_dirtied export mm/page_isolation.c: change the prototype of undo_isolate_page_range() include/linux/vmpressure.h: use spinlock_t instead of struct spinlock mm: remove the exporting of totalram_pages include/linux/pagemap.h: document trylock_page() return value mm:debug: mm/failslab.c: by default, do not fail allocations with direct reclaim only Patch series "debug_pagealloc improvements": mm, debug_pagelloc: use static keys to enable debugging mm, page_alloc: more extensive free page checking with debug_pagealloc mm, debug_pagealloc: use a page type instead of page_ext flag mm:pagecache: Patch series "fix filler_t callback type mismatches", v2: mm/filemap.c: fix an overly long line in read_cache_page mm/filemap: don't cast ->readpage to filler_t for do_read_cache_page jffs2: pass the correct prototype to read_cache_page 9p: pass the correct prototype to read_cache_page mm/filemap.c: correct the comment about VM_FAULT_RETRY mm:swap: mm, swap: fix race between swapoff and some swap operations mm/swap_state.c: simplify total_swapcache_pages() with get_swap_device() mm, swap: use rbtree for swap_extent mm/mincore.c: fix race between swapoff and mincore mm:memcg: memcg, oom: no oom-kill for __GFP_RETRY_MAYFAIL memcg, fsnotify: no oom-kill for remote memcg charging mm, memcg: introduce memory.events.local mm: memcontrol: dump memory.stat during cgroup OOM Patch series "mm: reparent slab memory on cgroup removal", v7: mm: memcg/slab: postpone kmem_cache memcg pointer initialization to memcg_link_cache() mm: memcg/slab: rename slab delayed deactivation functions and fields mm: memcg/slab: generalize postponed non-root kmem_cache deactivation mm: memcg/slab: introduce __memcg_kmem_uncharge_memcg() mm: memcg/slab: unify SLAB and SLUB page accounting mm: memcg/slab: don't check the dying flag on kmem_cache creation mm: memcg/slab: synchronize access to kmem_cache dying flag using a spinlock mm: memcg/slab: rework non-root kmem_cache lifecycle management mm: memcg/slab: stop setting page->mem_cgroup pointer for slab pages mm: memcg/slab: reparent memcg kmem_caches on cgroup removal mm, memcg: add a memcg_slabinfo debugfs file mm:gup: Patch series "switch the remaining architectures to use generic GUP", v4: mm: use untagged_addr() for get_user_pages_fast addresses mm: simplify gup_fast_permitted mm: lift the x86_32 PAE version of gup_get_pte to common code MIPS: use the generic get_user_pages_fast code sh: add the missing pud_page definition sh: use the generic get_user_pages_fast code sparc64: add the missing pgd_page definition sparc64: define untagged_addr() sparc64: use the generic get_user_pages_fast code mm: rename CONFIG_HAVE_GENERIC_GUP to CONFIG_HAVE_FAST_GUP mm: reorder code blocks in gup.c mm: consolidate the get_user_pages* implementations mm: validate get_user_pages_fast flags mm: move the powerpc hugepd code to mm/gup.c mm: switch gup_hugepte to use try_get_compound_head mm: mark the page referenced in gup_hugepte mm/gup: speed up check_and_migrate_cma_pages() on huge page mm/gup.c: remove some BUG_ONs from get_gate_page() mm/gup.c: mark undo_dev_pagemap as __maybe_unused mm:pagemap: asm-generic, x86: introduce generic pte_{alloc,free}_one[_kernel] alpha: switch to generic version of pte allocation arm: switch to generic version of pte allocation arm64: switch to generic version of pte allocation csky: switch to generic version of pte allocation m68k: sun3: switch to generic version of pte allocation mips: switch to generic version of pte allocation nds32: switch to generic version of pte allocation nios2: switch to generic version of pte allocation parisc: switch to generic version of pte allocation riscv: switch to generic version of pte allocation um: switch to generic version of pte allocation unicore32: switch to generic version of pte allocation mm/pgtable: drop pgtable_t variable from pte_fn_t functions mm/memory.c: fail when offset == num in first check of __vm_map_pages() mm:infrastructure: mm/mmu_notifier: use hlist_add_head_rcu() mm:vmalloc: Patch series "Some cleanups for the KVA/vmalloc", v5: mm/vmalloc.c: remove "node" argument mm/vmalloc.c: preload a CPU with one object for split purpose mm/vmalloc.c: get rid of one single unlink_va() when merge mm/vmalloc.c: switch to WARN_ON() and move it under unlink_va() mm/vmalloc.c: spelling> s/informaion/information/ mm:initialization: mm/large system hash: use vmalloc for size > MAX_ORDER when !hashdist mm/large system hash: clear hashdist when only one node with memory is booted mm:pagealloc: arm64: move jump_label_init() before parse_early_param() Patch series "add init_on_alloc/init_on_free boot options", v10: mm: security: introduce init_on_alloc=1 and init_on_free=1 boot options mm: init: report memory auto-initialization features at boot time mm:vmscan: mm: vmscan: remove double slab pressure by inc'ing sc->nr_scanned mm: vmscan: correct some vmscan counters for THP swapout mm:tools: tools/vm/slabinfo: order command line options tools/vm/slabinfo: add partial slab listing to -X tools/vm/slabinfo: add option to sort by partial slabs tools/vm/slabinfo: add sorting info to help menu mm:proc: proc: use down_read_killable mmap_sem for /proc/pid/maps proc: use down_read_killable mmap_sem for /proc/pid/smaps_rollup proc: use down_read_killable mmap_sem for /proc/pid/pagemap proc: use down_read_killable mmap_sem for /proc/pid/clear_refs proc: use down_read_killable mmap_sem for /proc/pid/map_files mm: use down_read_killable for locking mmap_sem in access_remote_vm mm: smaps: split PSS into components mm: vmalloc: show number of vmalloc pages in /proc/meminfo mm:ras: mm/memory-failure.c: clarify error message mm:oom-kill: mm: memcontrol: use CSS_TASK_ITER_PROCS at mem_cgroup_scan_tasks() mm, oom: refactor dump_tasks for memcg OOMs mm, oom: remove redundant task_in_mem_cgroup() check oom: decouple mems_allowed from oom_unkillable_task mm/oom_kill.c: remove redundant OOM score normalization in select_bad_process()" * akpm: (147 commits) mm/oom_kill.c: remove redundant OOM score normalization in select_bad_process() oom: decouple mems_allowed from oom_unkillable_task mm, oom: remove redundant task_in_mem_cgroup() check mm, oom: refactor dump_tasks for memcg OOMs mm: memcontrol: use CSS_TASK_ITER_PROCS at mem_cgroup_scan_tasks() mm/memory-failure.c: clarify error message mm: vmalloc: show number of vmalloc pages in /proc/meminfo mm: smaps: split PSS into components mm: use down_read_killable for locking mmap_sem in access_remote_vm proc: use down_read_killable mmap_sem for /proc/pid/map_files proc: use down_read_killable mmap_sem for /proc/pid/clear_refs proc: use down_read_killable mmap_sem for /proc/pid/pagemap proc: use down_read_killable mmap_sem for /proc/pid/smaps_rollup proc: use down_read_killable mmap_sem for /proc/pid/maps tools/vm/slabinfo: add sorting info to help menu tools/vm/slabinfo: add option to sort by partial slabs tools/vm/slabinfo: add partial slab listing to -X tools/vm/slabinfo: order command line options mm: vmscan: correct some vmscan counters for THP swapout mm: vmscan: remove double slab pressure by inc'ing sc->nr_scanned ...
2019-07-12mm: move the powerpc hugepd code to mm/gup.cChristoph Hellwig2-72/+1
While only powerpc supports the hugepd case, the code is pretty generic and I'd like to keep all GUP internals in one place. Link: http://lkml.kernel.org/r/20190625143715.1689-15-hch@lst.de Signed-off-by: Christoph Hellwig <hch@lst.de> Cc: Andrey Konovalov <andreyknvl@google.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: David Miller <davem@davemloft.net> Cc: James Hogan <jhogan@kernel.org> Cc: Jason Gunthorpe <jgg@mellanox.com> Cc: Khalid Aziz <khalid.aziz@oracle.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Nicholas Piggin <npiggin@gmail.com> Cc: Paul Burton <paul.burton@mips.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Rich Felker <dalias@libc.org> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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