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2015-09-26Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller264-1009/+955
Conflicts: net/ipv4/arp.c The net/ipv4/arp.c conflict was one commit adding a new local variable while another commit was deleting one. Signed-off-by: David S. Miller <davem@davemloft.net>
2015-09-25Merge tag 'pci-v4.3-fixes-1' of ↵Linus Torvalds9-5/+38
git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci Pull PCI fixes from Bjorn Helgaas: "These are fixes for things we merged for v4.3 (VPD, MSI, and bridge window management), and a new Renesas R8A7794 SoC device ID. Details: Resource management: - Revert pci_read_bridge_bases() unification (Bjorn Helgaas) - Clear IORESOURCE_UNSET when clipping a bridge window (Bjorn Helgaas) MSI: - Fix MSI IRQ domains for VFs on virtual buses (Alex Williamson) Renesas R-Car host bridge driver: - Add R8A7794 support (Sergei Shtylyov) Miscellaneous: - Fix devfn for VPD access through function 0 (Alex Williamson) - Use function 0 VPD only for identical functions (Alex Williamson)" * tag 'pci-v4.3-fixes-1' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: PCI: rcar: Add R8A7794 support PCI: Use function 0 VPD for identical functions, regular VPD for others PCI: Fix devfn for VPD access through function 0 PCI/MSI: Fix MSI IRQ domains for VFs on virtual buses PCI: Clear IORESOURCE_UNSET when clipping a bridge window PCI: Revert "PCI: Call pci_read_bridge_bases() from core instead of arch code"
2015-09-25Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds13-9/+42
Pull KVM fixes from Paolo Bonzini: "AMD fixes for bugs introduced in the 4.2 merge window, and a few PPC bug fixes too" * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: KVM: disable halt_poll_ns as default for s390x KVM: x86: fix off-by-one in reserved bits check KVM: x86: use correct page table format to check nested page table reserved bits KVM: svm: do not call kvm_set_cr0 from init_vmcb KVM: x86: trap AMD MSRs for the TSeg base and mask KVM: PPC: Book3S: Take the kvm->srcu lock in kvmppc_h_logical_ci_load/store() KVM: PPC: Book3S HV: Pass the correct trap argument to kvmhv_commence_exit KVM: PPC: Book3S HV: Fix handling of interrupted VCPUs kvm: svm: reset mmu on VCPU reset
2015-09-25Merge tag 'powerpc-4.3-3' of ↵Linus Torvalds3-1/+3
git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux Pull powerpc fixes from Michael Ellerman: - Wire up sys_membarrier() - cxl: Fix lockdep warning while creating afu_err_buff from Vaibhav * tag 'powerpc-4.3-3' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: cxl: Fix lockdep warning while creating afu_err_buff attribute powerpc: Wire up sys_membarrier()
2015-09-25KVM: disable halt_poll_ns as default for s390xDavid Hildenbrand6-0/+6
We observed some performance degradation on s390x with dynamic halt polling. Until we can provide a proper fix, let's enable halt_poll_ns as default only for supported architectures. Architectures are now free to set their own halt_poll_ns default value. Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-09-25KVM: x86: fix off-by-one in reserved bits checkPaolo Bonzini1-1/+1
29ecd6601904 ("KVM: x86: avoid uninitialized variable warning", 2015-09-06) introduced a not-so-subtle problem, which probably escaped review because it was not part of the patch context. Before the patch, leaf was always equal to iterator.level. After, it is equal to iterator.level - 1 in the call to is_shadow_zero_bits_set, and when is_shadow_zero_bits_set does another "-1" the check on reserved bits becomes incorrect. Using "iterator.level" in the call fixes this call trace: WARNING: CPU: 2 PID: 17000 at arch/x86/kvm/mmu.c:3385 handle_mmio_page_fault.part.93+0x1a/0x20 [kvm]() Modules linked in: tun sha256_ssse3 sha256_generic drbg binfmt_misc ipv6 vfat fat fuse dm_crypt dm_mod kvm_amd kvm crc32_pclmul aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd fam15h_power amd64_edac_mod k10temp edac_core amdkfd amd_iommu_v2 radeon acpi_cpufreq [...] Call Trace: dump_stack+0x4e/0x84 warn_slowpath_common+0x95/0xe0 warn_slowpath_null+0x1a/0x20 handle_mmio_page_fault.part.93+0x1a/0x20 [kvm] tdp_page_fault+0x231/0x290 [kvm] ? emulator_pio_in_out+0x6e/0xf0 [kvm] kvm_mmu_page_fault+0x36/0x240 [kvm] ? svm_set_cr0+0x95/0xc0 [kvm_amd] pf_interception+0xde/0x1d0 [kvm_amd] handle_exit+0x181/0xa70 [kvm_amd] ? kvm_arch_vcpu_ioctl_run+0x68b/0x1730 [kvm] kvm_arch_vcpu_ioctl_run+0x6f6/0x1730 [kvm] ? kvm_arch_vcpu_ioctl_run+0x68b/0x1730 [kvm] ? preempt_count_sub+0x9b/0xf0 ? mutex_lock_killable_nested+0x26f/0x490 ? preempt_count_sub+0x9b/0xf0 kvm_vcpu_ioctl+0x358/0x710 [kvm] ? __fget+0x5/0x210 ? __fget+0x101/0x210 do_vfs_ioctl+0x2f4/0x560 ? __fget_light+0x29/0x90 SyS_ioctl+0x4c/0x90 entry_SYSCALL_64_fastpath+0x16/0x73 ---[ end trace 37901c8686d84de6 ]--- Reported-by: Borislav Petkov <bp@alien8.de> Tested-by: Borislav Petkov <bp@alien8.de> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-09-25KVM: x86: use correct page table format to check nested page table reserved bitsPaolo Bonzini1-6/+17
Intel CPUID on AMD host or vice versa is a weird case, but it can happen. Handle it by checking the host CPU vendor instead of the guest's in reset_tdp_shadow_zero_bits_mask. For speed, the check uses the fact that Intel EPT has an X (executable) bit while AMD NPT has NX. Reported-by: Borislav Petkov <bp@alien8.de> Tested-by: Borislav Petkov <bp@alien8.de> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-09-25KVM: svm: do not call kvm_set_cr0 from init_vmcbPaolo Bonzini1-1/+2
kvm_set_cr0 may want to call kvm_zap_gfn_range and thus access the memslots array (SRCU protected). Using a mini SRCU critical section is ugly, and adding it to kvm_arch_vcpu_create doesn't work because the VMX vcpu_create callback calls synchronize_srcu. Fixes this lockdep splat: =============================== [ INFO: suspicious RCU usage. ] 4.3.0-rc1+ #1 Not tainted ------------------------------- include/linux/kvm_host.h:488 suspicious rcu_dereference_check() usage! other info that might help us debug this: rcu_scheduler_active = 1, debug_locks = 0 1 lock held by qemu-system-i38/17000: #0: (&(&kvm->mmu_lock)->rlock){+.+...}, at: kvm_zap_gfn_range+0x24/0x1a0 [kvm] [...] Call Trace: dump_stack+0x4e/0x84 lockdep_rcu_suspicious+0xfd/0x130 kvm_zap_gfn_range+0x188/0x1a0 [kvm] kvm_set_cr0+0xde/0x1e0 [kvm] init_vmcb+0x760/0xad0 [kvm_amd] svm_create_vcpu+0x197/0x250 [kvm_amd] kvm_arch_vcpu_create+0x47/0x70 [kvm] kvm_vm_ioctl+0x302/0x7e0 [kvm] ? __lock_is_held+0x51/0x70 ? __fget+0x101/0x210 do_vfs_ioctl+0x2f4/0x560 ? __fget_light+0x29/0x90 SyS_ioctl+0x4c/0x90 entry_SYSCALL_64_fastpath+0x16/0x73 Reported-by: Borislav Petkov <bp@alien8.de> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-09-24Merge tag 'devicetree-fixes-for-4.3' of ↵Linus Torvalds2-2/+2
git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux Pull DeviceTree fixes from Rob Herring: - Silence bogus warning for of_irq_parse_pci - Fix typo in ARM idle-states binding doc and dts files - Various minor binding documentation updates * tag 'devicetree-fixes-for-4.3' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux: Documentation: arm: Fix typo in the idle-states bindings examples gpio: mention in DT binding doc that <name>-gpio is deprecated of_pci_irq: Silence bogus "of_irq_parse_pci() failed ..." messages. devicetree: bindings: Extend the bma180 bindings with bma250 info of: thermal: Mark cooling-*-level properties optional of: thermal: Fix inconsitency between cooling-*-state and cooling-*-level Docs: dt: add #msi-cells to GICv3 ITS binding of: add vendor prefix for Socionext Inc.
2015-09-24Documentation: arm: Fix typo in the idle-states bindings examplesLorenzo Pieralisi2-2/+2
The idle-states bindings mandate that the entry-method string in the idle-states node must be "psci" for ARM v8 64-bit systems, but the examples in the bindings report a wrong entry-method string. Owing to this typo, some dts in the kernel wrongly defined the entry-method property, since they likely cut and pasted the example definition without paying attention to the bindings definitions. This patch fixes the typo in the DT idle states bindings examples and respective dts in the kernel so that the bindings and related dts files are made compliant. Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Cc: Howard Chen <howard.chen@linaro.org> Cc: Rob Herring <robh+dt@kernel.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Heiko Stuebner <heiko@sntech.de> Signed-off-by: Rob Herring <robh@kernel.org>
2015-09-22x86, efi, kasan: #undef memset/memcpy/memmove per archAndrey Ryabinin1-0/+10
In not-instrumented code KASAN replaces instrumented memset/memcpy/memmove with not-instrumented analogues __memset/__memcpy/__memove. However, on x86 the EFI stub is not linked with the kernel. It uses not-instrumented mem*() functions from arch/x86/boot/compressed/string.c So we don't replace them with __mem*() variants in EFI stub. On ARM64 the EFI stub is linked with the kernel, so we should replace mem*() functions with __mem*(), because the EFI stub runs before KASAN sets up early shadow. So let's move these #undef mem* into arch's asm/efi.h which is also included by the EFI stub. Also, this will fix the warning in 32-bit build reported by kbuild test robot: efi-stub-helper.c:599:2: warning: implicit declaration of function 'memcpy' [akpm@linux-foundation.org: use 80 cols in comment] Signed-off-by: Andrey Ryabinin <ryabinin.a.a@gmail.com> Reported-by: Fengguang Wu <fengguang.wu@gmail.com> Cc: Will Deacon <will.deacon@arm.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Matt Fleming <matt.fleming@intel.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-09-22Merge branch 'kvm-ppc-fixes' of ↵Paolo Bonzini3-1/+12
git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc into kvm-master
2015-09-21arm: dts: am4372: add syscon phandle to cpsw nodeMugunthan V N1-0/+1
There are 2 MACIDs stored in the control module of the am4372. These are read by the cpsw driver if no valid MACID was found in the devicetree. Signed-off-by: Mugunthan V N <mugunthanvnm@ti.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-09-21arm: dts: dra7: add syscon phandle to cpsw nodeMugunthan V N1-0/+1
There are 2 MACIDs stored in the control module of the dra7. These are read by the cpsw driver if no valid MACID was found in the devicetree. Signed-off-by: Mugunthan V N <mugunthanvnm@ti.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-09-21Merge branch 'for-linus' of ↵Linus Torvalds10-181/+147
git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux Pull s390 fixes from Martin Schwidefsky: "A couple of system call updates. The two new system calls userfaultfd and membarrier have been added, as well as the 17 direct calls for the multiplexed socket system calls. In addition the system call compat wrappers have been flagged as notrace functions and a few wrappers could be removed. And bug fixes for the vector register handling, cpu_mf, suspend/resume, compat signals, SMT cputime accounting and the zfcp dumper" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: s390: wire up separate socketcalls system calls s390/compat: remove superfluous compat wrappers s390/compat: do not trace compat wrapper functions s390/s390x: allocate sys_membarrier system call number s390/configs//zfcpdump_defconfig: Remove CONFIG_MEMSTICK s390: wire up userfaultfd system call s390/vtime: correct scaled cputime for SMT s390/cpum_cf: Corrected return code for unauthorized counter sets s390/compat: correct uc_sigmask of the compat signal frame s390: fix floating point register corruption s390/hibernate: fix save and restore of vector registers
2015-09-21powerpc: Wire up sys_membarrier()Michael Ellerman3-1/+3
The selftest passes on 64-bit LE & BE, and 32-bit. Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2015-09-21KVM: x86: trap AMD MSRs for the TSeg base and maskPaolo Bonzini2-0/+3
These have roughly the same purpose as the SMRR, which we do not need to implement in KVM. However, Linux accesses MSR_K8_TSEG_ADDR at boot, which causes problems when running a Xen dom0 under KVM. Just return 0, meaning that processor protection of SMRAM is not in effect. Reported-by: M A Young <m.a.young@durham.ac.uk> Cc: stable@vger.kernel.org Acked-by: Borislav Petkov <bp@suse.de> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-09-20net: add Hisilicon Network Subsystem support (config and documents)huangdaode1-0/+193
The Hisilicon Network Subsystem is a long term evolution IP which is supposed to be used in Hisilicon ICT SoC. The IP, which is called hns for short, is a TCP/IP acceleration engine, which can directly decode TCP/IP stream and distribute them to different ring buffers. HNS can be configured to work on different mode for different scenario. This patch make use only some of the mode to make it as standard ethernet NIC. The other mode will be added soon. The whole function has 4 kernel sub-modules: hnae: the HNS acceleration engine framework. It provides a abstract interface between the engine and the upper layers which make use of the engine by ring buffer. hns_enet_drv: a standard ethernet driver that base on the ring buffer. hns_dsaf: one of the implementation of HNS acceleration engine, which is applied on Hililicon hip05, Hi1610 and other later-on SoCs hns_mdio: the mdio control to the PHY, used by acceleration engine This submit add basic config and documents Signed-off-by: huangdaode <huangdaode@hisilicon.com> Signed-off-by: Kenneth Lee <liguozhu@huawei.com> Signed-off-by: Yisen Zhuang <Yisen.Zhuang@huawei.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-09-21KVM: PPC: Book3S: Take the kvm->srcu lock in kvmppc_h_logical_ci_load/store()Thomas Huth1-0/+6
Access to the kvm->buses (like with the kvm_io_bus_read() and -write() functions) has to be protected via the kvm->srcu lock. The kvmppc_h_logical_ci_load() and -store() functions are missing this lock so far, so let's add it there, too. This fixes the problem that the kernel reports "suspicious RCU usage" when lock debugging is enabled. Cc: stable@vger.kernel.org # v4.1+ Fixes: 99342cf8044420eebdf9297ca03a14cb6a7085a1 Signed-off-by: Thomas Huth <thuth@redhat.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2015-09-21KVM: PPC: Book3S HV: Pass the correct trap argument to kvmhv_commence_exitGautham R. Shenoy1-0/+1
In guest_exit_cont we call kvmhv_commence_exit which expects the trap number as the argument. However r3 doesn't contain the trap number at this point and as a result we would be calling the function with a spurious trap number. Fix this by copying r12 into r3 before calling kvmhv_commence_exit as r12 contains the trap number. Cc: stable@vger.kernel.org # v4.1+ Fixes: eddb60fb1443 Signed-off-by: Gautham R. Shenoy <ego@linux.vnet.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2015-09-21KVM: PPC: Book3S HV: Fix handling of interrupted VCPUsPaul Mackerras1-1/+5
This fixes a bug which results in stale vcore pointers being left in the per-cpu preempted vcore lists when a VM is destroyed. The result of the stale vcore pointers is usually either a crash or a lockup inside collect_piggybacks() when another VM is run. A typical lockup message looks like: [ 472.161074] NMI watchdog: BUG: soft lockup - CPU#24 stuck for 22s! [qemu-system-ppc:7039] [ 472.161204] Modules linked in: kvm_hv kvm_pr kvm xt_CHECKSUM ipt_MASQUERADE nf_nat_masquerade_ipv4 tun ip6t_rpfilter ip6t_REJECT nf_reject_ipv6 xt_conntrack ebtable_nat ebtable_broute bridge stp llc ebtable_filter ebtables ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6 ip6table_mangle ip6table_security ip6table_raw ip6table_filter ip6_tables iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack iptable_mangle iptable_security iptable_raw ses enclosure shpchp rtc_opal i2c_opal powernv_rng binfmt_misc dm_service_time scsi_dh_alua radeon i2c_algo_bit drm_kms_helper ttm drm tg3 ptp pps_core cxgb3 ipr i2c_core mdio dm_multipath [last unloaded: kvm_hv] [ 472.162111] CPU: 24 PID: 7039 Comm: qemu-system-ppc Not tainted 4.2.0-kvm+ #49 [ 472.162187] task: c000001e38512750 ti: c000001e41bfc000 task.ti: c000001e41bfc000 [ 472.162262] NIP: c00000000096b094 LR: c00000000096b08c CTR: c000000000111130 [ 472.162337] REGS: c000001e41bff520 TRAP: 0901 Not tainted (4.2.0-kvm+) [ 472.162399] MSR: 9000000100009033 <SF,HV,EE,ME,IR,DR,RI,LE> CR: 24848844 XER: 00000000 [ 472.162588] CFAR: c00000000096b0ac SOFTE: 1 GPR00: c000000000111170 c000001e41bff7a0 c00000000127df00 0000000000000001 GPR04: 0000000000000003 0000000000000001 0000000000000000 0000000000874821 GPR08: c000001e41bff8e0 0000000000000001 0000000000000000 d00000000efde740 GPR12: c000000000111130 c00000000fdae400 [ 472.163053] NIP [c00000000096b094] _raw_spin_lock_irqsave+0xa4/0x130 [ 472.163117] LR [c00000000096b08c] _raw_spin_lock_irqsave+0x9c/0x130 [ 472.163179] Call Trace: [ 472.163206] [c000001e41bff7a0] [c000001e41bff7f0] 0xc000001e41bff7f0 (unreliable) [ 472.163295] [c000001e41bff7e0] [c000000000111170] __wake_up+0x40/0x90 [ 472.163375] [c000001e41bff830] [d00000000efd6fc0] kvmppc_run_core+0x1240/0x1950 [kvm_hv] [ 472.163465] [c000001e41bffa30] [d00000000efd8510] kvmppc_vcpu_run_hv+0x5a0/0xd90 [kvm_hv] [ 472.163559] [c000001e41bffb70] [d00000000e9318a4] kvmppc_vcpu_run+0x44/0x60 [kvm] [ 472.163653] [c000001e41bffba0] [d00000000e92e674] kvm_arch_vcpu_ioctl_run+0x64/0x170 [kvm] [ 472.163745] [c000001e41bffbe0] [d00000000e9263a8] kvm_vcpu_ioctl+0x538/0x7b0 [kvm] [ 472.163834] [c000001e41bffd40] [c0000000002d0f50] do_vfs_ioctl+0x480/0x7c0 [ 472.163910] [c000001e41bffde0] [c0000000002d1364] SyS_ioctl+0xd4/0xf0 [ 472.163986] [c000001e41bffe30] [c000000000009260] system_call+0x38/0xd0 [ 472.164060] Instruction dump: [ 472.164098] ebc1fff0 ebe1fff8 7c0803a6 4e800020 60000000 60000000 60420000 8bad02e2 [ 472.164224] 7fc3f378 4b6a57c1 60000000 7c210b78 <e92d0000> 89290009 792affe3 40820070 The bug is that kvmppc_run_vcpu does not correctly handle the case where a vcpu task receives a signal while its guest vcpu is executing in the guest as a result of being piggy-backed onto the execution of another vcore. In that case we need to wait for the vcpu to finish executing inside the guest, and then remove this vcore from the preempted vcores list. That way, we avoid leaving this vcpu's vcore on the preempted vcores list when the vcpu gets interrupted. Fixes: ec2571650826 Reported-by: Thomas Huth <thuth@redhat.com> Tested-by: Thomas Huth <thuth@redhat.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2015-09-19Merge branch 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-armLinus Torvalds3-10/+17
Pull ARM fixes from Russell King: "Three fixes and a resulting cleanup for -rc2: - Andre Przywara reported that he was seeing a warning with the new cast inside DMA_ERROR_CODE's definition, and fixed the incorrect use. - Doug Anderson noticed that kgdb causes a "scheduling while atomic" bug. - OMAP5 folk noticed that their Thumb-2 compiled X servers crashed when enabling support to cover ARMv6 CPUs due to a kernel bug leaking some conditional context into the signal handler" * 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm: ARM: 8425/1: kgdb: Don't try to stop the machine when setting breakpoints ARM: 8437/1: dma-mapping: fix build warning with new DMA_ERROR_CODE definition ARM: get rid of needless #if in signal handling code ARM: fix Thumb2 signal handling when ARMv6 is enabled
2015-09-18Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds22-83/+57
Pull KVM fixes from Paolo Bonzini: "Mostly stable material, a lot of ARM fixes" * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (22 commits) sched: access local runqueue directly in single_task_running arm/arm64: KVM: Remove 'config KVM_ARM_MAX_VCPUS' arm64: KVM: Remove all traces of the ThumbEE registers arm: KVM: Disable virtual timer even if the guest is not using it arm64: KVM: Disable virtual timer even if the guest is not using it arm/arm64: KVM: vgic: Check for !irqchip_in_kernel() when mapping resources KVM: s390: Replace incorrect atomic_or with atomic_andnot arm: KVM: Fix incorrect device to IPA mapping arm64: KVM: Fix user access for debug registers KVM: vmx: fix VPID is 0000H in non-root operation KVM: add halt_attempted_poll to VCPU stats kvm: fix zero length mmio searching kvm: fix double free for fast mmio eventfd kvm: factor out core eventfd assign/deassign logic kvm: don't try to register to KVM_FAST_MMIO_BUS for non mmio eventfd KVM: make the declaration of functions within 80 characters KVM: arm64: add workaround for Cortex-A57 erratum #852523 KVM: fix polling for guest halt continued even if disable it arm/arm64: KVM: Fix PSCI affinity info return value for non valid cores arm64: KVM: set {v,}TCR_EL2 RES1 bits ...
2015-09-18Merge branch 'irq-urgent-for-linus' of ↵Linus Torvalds108-217/+154
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull irq updates from Thomas Gleixner: "This is a rather large update post rc1 due to the final steps of cleanups and API changes which had to wait for the preparatory patches to hit your tree. - Regression fixes for ARM GIC irqchips - Regression fixes and lockdep anotations for renesas irq chips - The leftovers of the cleanup and preparatory patches which have been ignored by maintainers - Final conversions of the newly merged users of obsolete APIs - Final removal of obsolete APIs - Final removal of ARM artifacts which had been introduced during the conversion of ARM to the generic interrupt code. - Final split of the irq_data into chip specific and common data to reflect the needs of hierarchical irq domains. - Treewide removal of the first argument of interrupt flow handlers, i.e. the irq number, which is not used by the majority of handlers and simple to retrieve from the other argument the irq descriptor. - A few comment updates and build warning fixes" * 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (40 commits) arm64: Remove ununsed set_irq_flags ARM: Remove ununsed set_irq_flags sh: Kill off set_irq_flags usage irqchip: Kill off set_irq_flags usage gpu/drm: Kill off set_irq_flags usage genirq: Remove irq argument from irq flow handlers genirq: Move field 'msi_desc' from irq_data into irq_common_data genirq: Move field 'affinity' from irq_data into irq_common_data genirq: Move field 'handler_data' from irq_data into irq_common_data genirq: Move field 'node' from irq_data into irq_common_data irqchip/gic-v3: Use IRQD_FORWARDED_TO_VCPU flag irqchip/gic: Use IRQD_FORWARDED_TO_VCPU flag genirq: Provide IRQD_FORWARDED_TO_VCPU status flag genirq: Simplify irq_data_to_desc() genirq: Remove __irq_set_handler_locked() pinctrl/pistachio: Use irq_set_handler_locked gpio: vf610: Use irq_set_handler_locked powerpc/mpc8xx: Use irq_set_handler_locked() powerpc/ipic: Use irq_set_handler_locked() powerpc/cpm2: Use irq_set_handler_locked() ...
2015-09-18Merge branch 'x86-urgent-for-linus' of ↵Linus Torvalds1-1/+1
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 fix from Thomas Gleixner: "A single regression fix for the x86 dma allocator which got wreckaged in the merge window" * 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/pci/dma: Fix gfp flags for coherent DMA memory allocation
2015-09-18Merge tag 'powerpc-4.3-2' of ↵Linus Torvalds14-14/+58
git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux Pull powerpc fixes from Michael Ellerman: - Fix 32-bit TCE table init in kdump kernel from Nish - Fix kdump with non-power-of-2 crashkernel= from Nish - Abort cxl_pci_enable_device_hook() if PCI channel is offline from Andrew - Fix to release DRC when configure_connector() fails from Bharata - Wire up sys_userfaultfd() - Fix race condition in tearing down MSI interrupts from Paul - Fix unbalanced pci_dev_get() in cxl_probe() from Daniel - Fix cxl build failure due to -Wunused-variable gcc behaviour change from Ian - Tell the toolchain to use ABI v2 when building an LE boot wrapper from Benh - Fix THP to recompute hash value after a failed update from Aneesh - 32-bit memcpy/memset: only use dcbz once cache is enabled from Christophe * tag 'powerpc-4.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: powerpc32: memset: only use dcbz once cache is enabled powerpc32: memcpy: only use dcbz once cache is enabled powerpc/mm: Recompute hash value after a failed update powerpc/boot: Specify ABI v2 when building an LE boot wrapper cxl: Fix build failure due to -Wunused-variable behaviour change cxl: Fix unbalanced pci_dev_get in cxl_probe powerpc/MSI: Fix race condition in tearing down MSI interrupts powerpc: Wire up sys_userfaultfd() powerpc/pseries: Release DRC when configure_connector fails cxl: abort cxl_pci_enable_device_hook() if PCI channel is offline powerpc/powernv/pci-ioda: fix kdump with non-power-of-2 crashkernel= powerpc/powernv/pci-ioda: fix 32-bit TCE table init in kdump kernel
2015-09-18kvm: svm: reset mmu on VCPU resetIgor Mammedov1-0/+1
When INIT/SIPI sequence is sent to VCPU which before that was in use by OS, VMRUN might fail with: KVM: entry failed, hardware error 0xffffffff EAX=00000000 EBX=00000000 ECX=00000000 EDX=000006d3 ESI=00000000 EDI=00000000 EBP=00000000 ESP=00000000 EIP=00000000 EFL=00000002 [-------] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 00000000 0000ffff 00009300 CS =9a00 0009a000 0000ffff 00009a00 [...] CR0=60000010 CR2=b6f3e000 CR3=01942000 CR4=000007e0 [...] EFER=0000000000000000 with corresponding SVM error: KVM: FAILED VMRUN WITH VMCB: [...] cpl: 0 efer: 0000000000001000 cr0: 0000000080010010 cr2: 00007fd7fe85bf90 cr3: 0000000187d0c000 cr4: 0000000000000020 [...] What happens is that VCPU state right after offlinig: CR0: 0x80050033 EFER: 0xd01 CR4: 0x7e0 -> long mode with CR3 pointing to longmode page tables and when VCPU gets INIT/SIPI following transition happens CR0: 0 -> 0x60000010 EFER: 0x0 CR4: 0x7e0 -> paging disabled with stale CR3 However SVM under the hood puts VCPU in Paged Real Mode* which effectively translates CR0 0x60000010 -> 80010010 after svm_vcpu_reset() -> init_vmcb() -> kvm_set_cr0() -> svm_set_cr0() but from kvm_set_cr0() perspective CR0: 0 -> 0x60000010 only caching bits are changed and commit d81135a57aa6 ("KVM: x86: do not reset mmu if CR0.CD and CR0.NW are changed")' regressed svm_vcpu_reset() which relied on MMU being reset. As result VMRUN after svm_vcpu_reset() tries to run VCPU in Paged Real Mode with stale MMU context (longmode page tables), which causes some AMD CPUs** to bail out with VMEXIT_INVALID. Fix issue by unconditionally resetting MMU context at init_vmcb() time. * AMD64 Architecture Programmer’s Manual, Volume 2: System Programming, rev: 3.25 15.19 Paged Real Mode ** Opteron 1216 Signed-off-by: Igor Mammedov <imammedo@redhat.com> Fixes: d81135a57aa6 Cc: stable@vger.kernel.org Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-09-18s390: wire up separate socketcalls system callsHeiko Carstens4-21/+42
As discussed on linux-arch all architectures should wire up the separate system calls that are hidden behind the socketcall multiplexer system call. It's just a couple more system calls and gives us a very small performance improvement. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2015-09-18s390/compat: remove superfluous compat wrappersHeiko Carstens2-102/+51
A couple of compat wrapper functions are simply trampolines to the real system call. This happened because the compat wrapper defines will only sign and zero extend system call parameters which are of different size on s390/s390x (longs and pointers). All other parameters will be correctly sign and zero extended by the normal system call wrappers. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2015-09-18s390/compat: do not trace compat wrapper functionsHeiko Carstens1-6/+6
Add notrace to the compat wrapper define to disable tracing of compat wrapper functions. These are supposed to be very small and more or less just a trampoline to the real system call. Also fix indentation. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2015-09-17Merge branch 'akpm' (patches from Andrew)Linus Torvalds2-1/+4
Merge misc fixes from ANdrew Morton: "8 fixes" * emailed patches from Andrew Morton <akpm@linux-foundation.org>: revert "mm: make sure all file VMAs have ->vm_ops set" MAINTAINERS: update LTP mailing list userfaultfd: add missing mmput() in error path lib/string_helpers.c: fix infinite loop in string_get_size() alpha: lib: export __delay alpha: io: define ioremap_uc kasan: fix last shadow judgement in memory_is_poisoned_16() zram: fix possible use after free in zcomp_create()
2015-09-17alpha: lib: export __delaySudip Mukherjee1-0/+1
__delay was not exported as a result while building with allmodconfig we were getting build error of undefined symbol. __delay is being used by: drivers/net/phy/mdio-octeon.c Signed-off-by: Sudip Mukherjee <sudip@vectorindia.org> Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Matt Turner <mattst88@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-09-17alpha: io: define ioremap_ucSudip Mukherjee1-1/+3
ioremap_uc was not defined and as a result while building with allmodconfig were getting build error of: implicit declaration of function 'ioremap_uc'. Signed-off-by: Sudip Mukherjee <sudip@vectorindia.org> Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Matt Turner <mattst88@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-09-17Merge tag 'arm64-fixes' of ↵Linus Torvalds9-22/+71
git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux Pull arm64 fixes from Will Deacon: "This addresses some problems with filesystem writeback due to the recently merged hardware DBM patches, which caused us to treat some read-only pages as dirty. There are also some other, less significant fixes that are described in the summary below: A mixture of fixes for regressions introduced during the merge window, some longer standing problems that we spotted and a couple of hardware errata. The main changes are: - Fix fallout from the h/w DBM patches, causing filesystem writeback issues on both v8 and v8.1 CPUs - Workaround for Cortex-A53 erratum #843419 in the module loader - Fix for long-standing issue with compat big-endian signal handlers using the saved floating point state" * tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: arm64: errata: add module build workaround for erratum #843419 arm64: compat: fix vfp save/restore across signal handlers in big-endian arm64: cpu hotplug: ensure we mask out CPU_TASKS_FROZEN in notifiers arm64: head.S: initialise mdcr_el2 in el2_setup arm64: enable generic idle loop arm64: pgtable: use a single bit for PTE_WRITE regardless of DBM arm64: Fix pte_modify() to preserve the hardware dirty information arm64: Fix the pte_hw_dirty() check when AF/DBM is enabled arm64: dma-mapping: check whether cma area is initialized or not
2015-09-17Merge branch 'x86-urgent-for-linus' of ↵Linus Torvalds11-27/+72
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 fixes from Ingo Molnar: - misc fixes all around the map - block non-root vm86(old) if mmap_min_addr != 0 - two small debuggability improvements - removal of obsolete paravirt op * 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/platform: Fix Geode LX timekeeping in the generic x86 build x86/apic: Serialize LVTT and TSC_DEADLINE writes x86/ioapic: Force affinity setting in setup_ioapic_dest() x86/paravirt: Remove the unused pv_time_ops::get_tsc_khz method x86/ldt: Fix small LDT allocation for Xen x86/vm86: Fix the misleading CONFIG_VM86 Kconfig help text x86/cpu: Print family/model/stepping in hex x86/vm86: Block non-root vm86(old) if mmap_min_addr != 0 x86/alternatives: Make optimize_nops() interrupt safe and synced x86/mm/srat: Print non-volatile flag in SRAT x86/cpufeatures: Enable cpuid for Intel SHA extensions
2015-09-17Merge branch 'perf-urgent-for-linus' of ↵Linus Torvalds2-1/+5
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull perf fixes from Ingo MOlnar: "Mostly tooling fixes, but also two x86 PMU driver fixes" * 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: perf tests: Fix software clock events test setting maps perf tests: Fix task exit test setting maps perf evlist: Fix create_syswide_maps() not propagating maps perf evlist: Fix add() not propagating maps perf evlist: Factor out a function to propagate maps for a single evsel perf evlist: Make create_maps() use set_maps() perf evlist: Make set_maps() more resilient perf evsel: Add own_cpus member perf evlist: Fix missing thread_map__put in propagate_maps() perf evlist: Fix splice_list_tail() not setting evlist perf evlist: Add has_user_cpus member perf evlist: Remove redundant validation from propagate_maps() perf evlist: Simplify set_maps() logic perf evlist: Simplify propagate_maps() logic perf top: Fix segfault pressing -> with no hist entries perf header: Fixup reading of HEADER_NRCPUS feature perf/x86/intel: Fix constraint access perf/x86/intel/bts: Set event->hw.itrace_started in pmu::start to match the new logic perf tools: Fix use of wrong event when processing exit events perf tools: Fix parse_events_add_pmu caller
2015-09-17Merge branch 'locking-urgent-for-linus' of ↵Linus Torvalds1-5/+14
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull locking fixes from Ingo Molnar: "Spinlock performance regression fix, plus documentation fixes" * 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: locking/static_keys: Fix up the static keys documentation locking/qspinlock/x86: Only emit the test-and-set fallback when building guest support locking/qspinlock/x86: Fix performance regression under unaccelerated VMs locking/static_keys: Fix a silly typo
2015-09-17Merge tag 'kvm-arm-for-4.3-rc2-2' of ↵Paolo Bonzini11-75/+28
git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into kvm-master Second set of KVM/ARM changes for 4.3-rc2 - Workaround for a Cortex-A57 erratum - Bug fix for the debugging infrastructure - Fix for 32bit guests with more than 4GB of address space on a 32bit host - A number of fixes for the (unusual) case when we don't use the in-kernel GIC emulation - Removal of ThumbEE handling on arm64, since these have been dropped from the architecture before anyone actually ever built a CPU - Remove the KVM_ARM_MAX_VCPUS limitation which has become fairly pointless
2015-09-17x86/pci/dma: Fix gfp flags for coherent DMA memory allocationJunichi Nomura1-1/+1
Commit 6894258eda2f reversed the order of gfp_flags adjustment in dma_alloc_attrs() for x86 [arch/x86/kernel/pci-dma.c] As a result, relevant flags set by dma_alloc_coherent_gfp_flags() are just discarded and cause coherent DMA memory allocation failure on some devices. Fixes: 6894258eda2f ("dma-mapping: consolidate dma_{alloc,free}_{attrs,coherent}") Signed-off-by: Jun'ichi Nomura <j-nomura@ce.jp.nec.com> Tested-by: Tony Luck <tony.luck@intel.com> Acked-by: Christoph Hellwig <hch@lst.de> Link: http://lkml.kernel.org/r/20150914073834.GA13077@xzibit.linux.bs1.fc.nec.co.jp Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2015-09-17arm/arm64: KVM: Remove 'config KVM_ARM_MAX_VCPUS'Ming Lei4-34/+4
This patch removes config option of KVM_ARM_MAX_VCPUS, and like other ARCHs, just choose the maximum allowed value from hardware, and follows the reasons: 1) from distribution view, the option has to be defined as the max allowed value because it need to meet all kinds of virtulization applications and need to support most of SoCs; 2) using a bigger value doesn't introduce extra memory consumption, and the help text in Kconfig isn't accurate because kvm_vpu structure isn't allocated until request of creating VCPU is sent from QEMU; 3) the main effect is that the field of vcpus[] in 'struct kvm' becomes a bit bigger(sizeof(void *) per vcpu) and need more cache lines to hold the structure, but 'struct kvm' is one generic struct, and it has worked well on other ARCHs already in this way. Also, the world switch frequecy is often low, for example, it is ~2000 when running kernel building load in VM from APM xgene KVM host, so the effect is very small, and the difference can't be observed in my test at all. Cc: Dann Frazier <dann.frazier@canonical.com> Signed-off-by: Ming Lei <ming.lei@canonical.com> Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2015-09-17arm64: KVM: Remove all traces of the ThumbEE registersWill Deacon4-29/+5
Although the ThumbEE registers and traps were present in earlier versions of the v8 architecture, it was retrospectively removed and so we can do the same. Whilst this breaks migrating a guest started on a previous version of the kernel, it is much better to kill these (non existent) registers as soon as possible. Reviewed-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com> [maz: added commend about migration] Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2015-09-17arm: KVM: Disable virtual timer even if the guest is not using itMarc Zyngier1-2/+4
When running a guest with the architected timer disabled (with QEMU and the kernel_irqchip=off option, for example), it is important to make sure the timer gets turned off. Otherwise, the guest may try to enable it anyway, leading to a screaming HW interrupt. The fix is to unconditionally turn off the virtual timer on guest exit. Cc: stable@vger.kernel.org Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2015-09-17arm64: KVM: Disable virtual timer even if the guest is not using itMarc Zyngier1-2/+3
When running a guest with the architected timer disabled (with QEMU and the kernel_irqchip=off option, for example), it is important to make sure the timer gets turned off. Otherwise, the guest may try to enable it anyway, leading to a screaming HW interrupt. The fix is to unconditionally turn off the virtual timer on guest exit. Cc: stable@vger.kernel.org Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2015-09-17s390/s390x: allocate sys_membarrier system call numberMathieu Desnoyers2-1/+3
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> CC: Andrew Morton <akpm@linux-foundation.org> CC: linux-api@vger.kernel.org CC: Heiko Carstens <heiko.carstens@de.ibm.com> CC: linux-s390@vger.kernel.org Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2015-09-17s390/configs//zfcpdump_defconfig: Remove CONFIG_MEMSTICKMichael Holzheu1-5/+0
This config option is completely irrelevant for zfcpdump and unfortunately causes a kernel panic on recent kernels in "mspro_block_init()/driver_register()". Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2015-09-17s390: wire up userfaultfd system callHeiko Carstens2-1/+3
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2015-09-17s390/vtime: correct scaled cputime for SMTMartin Schwidefsky1-4/+8
The scaled cputime is supposed to be derived from the normal per-thread cputime by dividing it with the average thread density in the last interval. The calculation of the scaling values for the average thread density is incorrect. The current, incorrect calculation: Ci = cycle count with i active threads T = unscaled cputime, sT = scaled cputime sT = T * (C1 + C2 + ... + Cn) / (1*C1 + 2*C2 + ... + n*Cn) The calculation happens to yield the correct numbers for the simple cases with only one Ci value not zero. But for cases with multiple Ci values not zero it fails. E.g. on a SMT-2 system with one thread active half the time and two threads active for the other half of the time it fails, the scaling factor should be 3/4 but the formula gives 2/3. The correct formula is sT = T * (C1/1 + C2/2 + ... + Cn/n) / (C1 + C2 + ... + Cn) Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2015-09-17s390/cpum_cf: Corrected return code for unauthorized counter setsHendrik Brueckner1-4/+8
Previously, the cpum_cf PMU returned -EPERM if a counter is requested and the counter set to which the counter belongs is not authorized. According to the perf_event_open() system call manual, an error code of EPERM indicates an unsupported exclude setting or CAP_SYS_ADMIN is missing. Use ENOENT to indicate that particular counters are not available when the counter set which contains the counter is not authorized. For generic events, this might trigger a fall back, for example, to a software event. Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2015-09-17s390/compat: correct uc_sigmask of the compat signal frameMartin Schwidefsky1-4/+23
The uc_sigmask in the ucontext structure is an array of words to keep the 64 signal bits (or 1024 if you ask glibc but the kernel sigset_t only has 64 bits). For 64 bit the sigset_t contains a single 8 byte word, but for 31 bit there are two 4 byte words. The compat signal handler code uses a simple copy of the 64 bit sigset_t to the 31 bit compat_sigset_t. As s390 is a big-endian architecture this is incorrect, the two words in the 31 bit sigset_t array need to be swapped. Cc: <stable@vger.kernel.org> Reported-by: Stefan Liebler <stli@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2015-09-17s390: fix floating point register corruptionHeiko Carstens1-0/+2
The critical section cleanup code misses to add the offset of the thread_struct to the task address. Therefore, if the critical section code gets executed, it may corrupt the task struct or restore the contents of the floating point registers from the wrong memory location. Fixes d0164ee20d "s390/kernel: remove save_fpu_regs() parameter and use __LC_CURRENT instead". Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Reviewed-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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