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2015-09-27MIPS: print MAAR configuration during bootPaul Burton
Verifying that the MAAR configuration is as expected is useful when debugging the performance of a system. Print out the memory regions configured via MAAR along with their attributes. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: linux-mips@linux-mips.org Cc: Steven J. Hill <Steven.Hill@imgtec.com> Cc: David Hildenbrand <dahi@linux.vnet.ibm.com> Cc: linux-kernel@vger.kernel.org Cc: Peter Zijlstra (Intel) <peterz@infradead.org> Patchwork: https://patchwork.linux-mips.org/patch/11238/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2015-09-27MIPS: mm: compile maar_init unconditionallyPaul Burton
maar_init was previously only compiled when CONFIG_NEED_MULTIPLE_NODES was not set, which has been fine since it is only called from the standard implementation of mem_init which has the same condition. In preparation for calling it from the SMP startup code on secondary CPUs, move maar_init outside of the #ifndef such that it is always compiled. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: Markos Chandras <markos.chandras@imgtec.com> Cc: linux-mips@linux-mips.org Cc: Steven J. Hill <Steven.Hill@imgtec.com> Cc: David Hildenbrand <dahi@linux.vnet.ibm.com> Cc: linux-kernel@vger.kernel.org Cc: Ingo Molnar <mingo@kernel.org> Patchwork: https://patchwork.linux-mips.org/patch/11237/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2015-09-27MIPS: CM: Provide a function to map from CPU to VP ID.Paul Burton
The VP ID of a given CPU may not match up with the CPU number used by Linux. For example, if the width of the VP part of the VP ID is wider than log2(number of VPs per core) and the system has multiple cores then this will be the case. Alternatively, if a pre-r6 system implements the MT ASE with multiple VPEs per core and Linux is built without support for the MT ASE then the numbers won't match up either. Provide a function to convert from CPU number to VP ID. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Acked-by: Thomas Gleixner <tglx@linutronix.de> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Cc: James Hogan <james.hogan@imgtec.com> Cc: Markos Chandras <markos.chandras@imgtec.com> Patchwork: https://patchwork.linux-mips.org/patch/11211/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2015-09-27Merge branch 'x86-urgent-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 fixes from Thomas Gleixner: "Two bugfixes from Andy addressing at least some of the subtle NMI related wreckage which has been reported by Sasha Levin" * 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/nmi/64: Fix a paravirt stack-clobbering bug in the NMI code x86/paravirt: Replace the paravirt nop with a bona fide empty function
2015-09-27Merge branch 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-armLinus Torvalds
Pull ARM fixes from Russell King: "Just two fixes: wire up the new system calls added during the last merge window, and fix another user access site" * 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm: ARM: alignment: fix alignment handling for uaccess changes ARM: wire up new syscalls
2015-09-27Merge tag 'armsoc-fixes' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc Pull ARM SoC fixes from Olof Johansson: "Our first real batch of fixes this release cycle. Nothing really concerning, and diffstat is a bit inflated due to some DT contents moving around on STi platforms. There's a collection of them here: - A fixup for a build breakage that hits on arm64 allmodconfig in QCOM SCM firmware drivers - MMC fixes for OMAP that had quite a bit of breakage this merge window. - Misc build/warning fixes on PXA and OMAP - A couple of minor fixes for Beagleboard X15 which is now starting to see a few more users in the wild" * tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (31 commits) ARM: sti: dt: adapt DT to fix probe/bind issues in DRM driver ARM: dts: fix omap2+ address translation for pbias firmware: qcom: scm: Add function stubs for ARM64 ARM: dts: am57xx-beagle-x15: use palmas-usb for USB2 ARM: omap2plus_defconfig: enable GPIO_PCA953X ARM: dts: omap5-uevm.dts: fix i2c5 pinctrl offsets ARM: OMAP2+: AM43XX: Enable autoidle for clks in am43xx_init_late ARM: dts: am57xx-beagle-x15: Update Phy supplies ARM: pxa: balloon3: Fix build error ARM: dts: Fixup model name for HP t410 dts ARM: dts: DRA7: fix a typo in ethernet ARM: omap2plus_defconfig: make PCF857x built-in ARM: dts: Use ti,pbias compatible string for pbias ARM: OMAP5: Cleanup options for SoC only build ARM: DRA7: Select missing options for SoC only build ARM: OMAP2+: board-generic: Remove stale of_irq macros ARM: OMAP4+: PM: erratum is used by OMAP5 and DRA7 as well ARM: dts: omap3-igep: Move eth IRQ pinmux to IGEPv2 common dtsi ARM: dts: am57xx-beagle-x15: Add wakeup irq for mcp79410 ARM: dts: am335x-phycore-som: Fix mpu voltage ...
2015-09-26Merge tag 'pxa-fixes-v4.3' of https://github.com/rjarzmik/linux into fixesOlof Johansson
ARM: pxa: fixes for v4.3 These fixes are mainly regression fixes triggered by irq changes, common clock framework introduction and sound side-effect of other platforms. * tag 'pxa-fixes-v4.3' of https://github.com/rjarzmik/linux: ARM: pxa: balloon3: Fix build error ARM: pxa: ssp: Fix build error by removing originally incorrect DT binding ARM: pxa: fix DFI bus lockups on startup Signed-off-by: Olof Johansson <olof@lixom.net>
2015-09-26Merge tag 'omap-for-v4.3/fixes-rc2' of ↵Olof Johansson
git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap into fixes Fixes for omaps for v4.3-rc cycle: - Two more patches to fix most of the MMC regressions with the PBIAS regulator changes. At least two MMC driver related issues still seems to remain for omap3 legacy booting and omap4 duovero. Note that the dts changes depend on a recent regulator fix, and are based on the regulator commit now in mainline kernel - Enable autoidle for am43xx clocks to prevent clocks from staying always on - Fix i2c5 pinctrl offsets for omap5-uevm - Enable PCA953X as that's needed for HDMI to work on omap5 - Update phy supplies for beagle x15 beta board - Use palmas-usb for on beagle x15 to start using the related driver that recently got merged * tag 'omap-for-v4.3/fixes-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap: ARM: dts: fix omap2+ address translation for pbias ARM: dts: am57xx-beagle-x15: use palmas-usb for USB2 ARM: omap2plus_defconfig: enable GPIO_PCA953X ARM: dts: omap5-uevm.dts: fix i2c5 pinctrl offsets ARM: OMAP2+: AM43XX: Enable autoidle for clks in am43xx_init_late ARM: dts: am57xx-beagle-x15: Update Phy supplies regulator: pbias: program pbias register offset in pbias driver ARM: omap2plus_defconfig: Enable MUSB DMA support ARM: DRA752: Add ID detect for ES2.0 ARM: OMAP3: vc: fix 'or' always true warning ARM: OMAP2+: Fix booting if no timer parent clock is available ARM: OMAP2+: omap-device: fix race deferred probe of omap_hsmmc vs omap_device_late_init Signed-off-by: Olof Johansson <olof@lixom.net>
2015-09-25Merge tag 'pci-v4.3-fixes-1' of ↵Linus Torvalds
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 Torvalds
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 Torvalds
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 Hildenbrand
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 Bonzini
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 Bonzini
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 Bonzini
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>
2015-09-25perf/x86: Change test_aperfmperf() and test_intel() to staticGeliang Tang
Fixes the following sparse warnings: arch/x86/kernel/cpu/perf_event_msr.c:13:6: warning: symbol 'test_aperfmperf' was not declared. Should it be static? arch/x86/kernel/cpu/perf_event_msr.c:18:6: warning: symbol 'test_intel' was not declared. Should it be static? Signed-off-by: Geliang Tang <geliangtang@163.com> Cc: Arnaldo Carvalho de Melo <acme@kernel.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/4588e8ab09638458f2451af572827108be3b4a36.1443123796.git.geliangtang@163.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-09-24Merge tag 'devicetree-fixes-for-4.3' of ↵Linus Torvalds
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.
2015-09-24Merge tag 'v4.3-rockchip32-dtsfixes1' of ↵Olof Johansson
git://git.kernel.org/pub/scm/linux/kernel/git/mmind/linux-rockchip into fixes Add the ddc-i2c-bus reference to the veyron hdmi nodes, so that they can read the edid of connected displays. * tag 'v4.3-rockchip32-dtsfixes1' of git://git.kernel.org/pub/scm/linux/kernel/git/mmind/linux-rockchip: ARM: dts: Add ddc i2c reference to veyron Signed-off-by: Olof Johansson <olof@lixom.net>
2015-09-24ARM: sti: dt: adapt DT to fix probe/bind issues in DRM driverBenjamin Gaignard
STI drm drivers probe and bind using component framework was incorrect. In addition to drivers fix DT update is needed to make all sub-components become childs of sti-display-subsystem. Signed-off-by: Benjamin Gaignard <benjamin.gaignard@linaro.org> Signed-off-by: Maxime Coquelin <maxime.coquelin@st.com> Signed-off-by: Olof Johansson <olof@lixom.net>
2015-09-24ARM: dts: fix omap2+ address translation for pbiasKishon Vijay Abraham I
"ARM: dts: <omap2/omap4/omap5/dra7>: add minimal l4 bus layout with control module support" moved pbias_regulator dt node from being a child node of ocp to be the child node of 'syscon'. Since 'syscon' doesn't have the 'ranges' property, address translation fails while trying to convert the address to resource. Fix it here by populating 'ranges' property in syscon dt node. Fixes: 72b10ac00eb1 ("ARM: dts: omap24xx: add minimal l4 bus layout with control module support") Fixes: 7415b0b4c645 ("ARM: dts: omap4: add minimal l4 bus layout with control module support") Fixes: ed8509edddeb ("ARM: dts: omap5: add minimal l4 bus layout with control module support") Fixes: d919501feffa ("ARM: dts: dra7: add minimal l4 bus layout with control module support") Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com> [tony@atomide.com: fixed omap3 pbias to work] Signed-off-by: Tony Lindgren <tony@atomide.com>
2015-09-24Documentation: arm: Fix typo in the idle-states bindings examplesLorenzo Pieralisi
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>
2015-09-24ARM: alignment: fix alignment handling for uaccess changesRussell King
Jonathan Liu reports that the recent addition of CPU_SW_DOMAIN_PAN causes wpa_supplicant to die due to the following kernel oops: Unhandled fault: page domain fault (0x81b) at 0x001017a2 pgd = ee1b8000 [001017a2] *pgd=6ebee831, *pte=6c35475f, *ppte=6c354c7f Internal error: : 81b [#1] SMP ARM Modules linked in: rt2800usb rt2x00usb rt2800librt2x00lib crc_ccitt mac80211 CPU: 1 PID: 202 Comm: wpa_supplicant Not tainted 4.3.0-rc2 #1 Hardware name: Allwinner sun7i (A20) Family task: ec872f80 ti: ee364000 task.ti: ee364000 PC is at do_alignment_ldmstm+0x1d4/0x238 LR is at 0x0 pc : [<c001d1d8>] lr : [<00000000>] psr: 600c0113 sp : ee365e18 ip : 00000000 fp : 00000002 r10: 001017a2 r9 : 00000002 r8 : 001017aa r7 : ee365fb0 r6 : e8820018 r5 : 001017a2 r4 : 00000003 r3 : d49e30e0 r2 : 00000000 r1 : ee365fbc r0 : 00000000 Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment none[ 34.393106] Control: 10c5387d Table: 6e1b806a DAC: 00000051 Process wpa_supplicant (pid: 202, stack limit = 0xee364210) Stack: (0xee365e18 to 0xee366000) ... [<c001d1d8>] (do_alignment_ldmstm) from [<c001d510>] (do_alignment+0x1f0/0x904) [<c001d510>] (do_alignment) from [<c00092a0>] (do_DataAbort+0x38/0xb4) [<c00092a0>] (do_DataAbort) from [<c0013d7c>] (__dabt_usr+0x3c/0x40) Exception stack(0xee365fb0 to 0xee365ff8) 5fa0: 00000000 56c728c0 001017a2 d49e30e0 5fc0: 775448d2 597d4e74 00200800 7a9e1625 00802001 00000021 b6deec84 00000100 5fe0: 08020200 be9f4f20 0c0b0d0a b6d9b3e0 600c0010 ffffffff Code: e1a0a005 e1a0000c 1affffe8 e5913000 (e4ea3001) ---[ end trace 0acd3882fcfdf9dd ]--- This is caused by the alignment handler not being fixed up for the uaccess changes, and userspace issuing an unaligned LDM instruction. So, fix the problem by adding the necessary fixups. Reported-by: Jonathan Liu <net147@gmail.com> Tested-by: Jonathan Liu <net147@gmail.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2015-09-23x86/cpufeatures: Correct spelling of the HWP_NOTIFY flagKristen Carlson Accardi
Because noitification just isn't right. Signed-off-by: Kristen Carlson Accardi <kristen@linux.intel.com> Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Cc: rjw@rjwysocki.net Link: http://lkml.kernel.org/r/1442944296-11737-1-git-send-email-kristen@linux.intel.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-09-22x86, efi, kasan: #undef memset/memcpy/memmove per archAndrey Ryabinin
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>
2015-09-22x86/nmi/64: Fix a paravirt stack-clobbering bug in the NMI codeAndy Lutomirski
The NMI entry code that switches to the normal kernel stack needs to be very careful not to clobber any extra stack slots on the NMI stack. The code is fine under the assumption that SWAPGS is just a normal instruction, but that assumption isn't really true. Use SWAPGS_UNSAFE_STACK instead. This is part of a fix for some random crashes that Sasha saw. Fixes: 9b6e6a8334d5 ("x86/nmi/64: Switch stacks on userspace NMI entry") Reported-and-tested-by: Sasha Levin <sasha.levin@oracle.com> Signed-off-by: Andy Lutomirski <luto@kernel.org> Cc: stable@vger.kernel.org Link: http://lkml.kernel.org/r/974bc40edffdb5c2950a5c4977f821a446b76178.1442791737.git.luto@kernel.org Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2015-09-22x86/paravirt: Replace the paravirt nop with a bona fide empty functionAndy Lutomirski
PARAVIRT_ADJUST_EXCEPTION_FRAME generates this code (using nmi as an example, trimmed for readability): ff 15 00 00 00 00 callq *0x0(%rip) # 2796 <nmi+0x6> 2792: R_X86_64_PC32 pv_irq_ops+0x2c That's a call through a function pointer to regular C function that does nothing on native boots, but that function isn't protected against kprobes, isn't marked notrace, and is certainly not guaranteed to preserve any registers if the compiler is feeling perverse. This is bad news for a CLBR_NONE operation. Of course, if everything works correctly, once paravirt ops are patched, it gets nopped out, but what if we hit this code before paravirt ops are patched in? This can potentially cause breakage that is very difficult to debug. A more subtle failure is possible here, too: if _paravirt_nop uses the stack at all (even just to push RBP), it will overwrite the "NMI executing" variable if it's called in the NMI prologue. The Xen case, perhaps surprisingly, is fine, because it's already written in asm. Fix all of the cases that default to paravirt_nop (including adjust_exception_frame) with a big hammer: replace paravirt_nop with an asm function that is just a ret instruction. The Xen case may have other problems, so document them. This is part of a fix for some random crashes that Sasha saw. Reported-and-tested-by: Sasha Levin <sasha.levin@oracle.com> Signed-off-by: Andy Lutomirski <luto@kernel.org> Cc: stable@vger.kernel.org Link: http://lkml.kernel.org/r/8f5d2ba295f9d73751c33d97fda03e0495d9ade0.1442791737.git.luto@kernel.org Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2015-09-22Merge branch 'kvm-ppc-fixes' of ↵Paolo Bonzini
git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc into kvm-master
2015-09-22MIPS: Fix FTLB detection for R6James Hogan
R6 removed the Config4.MMUExtDef field, with the low 16 bits only allowed to contain FTLB fields, and commit e87569cd6c57 ("MIPS: cpu-probe: Fix VTLB/FTLB configuration for R6") updated the probing of this field to assume an FTLB is always present for R6. However the FTLB may still be absent. The presence of those fields is actually specified by the MMU type in the Config.MT field, so use that (the new cpu_has_ftlb) to determine whether the FTLB is actually present. Fixes: e87569cd6c57 ("MIPS: cpu-probe: Fix VTLB/FTLB configuration for R6") Signed-off-by: James Hogan <james.hogan@imgtec.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Markos Chandras <markos.chandras@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/11160/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2015-09-22MIPS: cpu-features: Add cpu_has_ftlbJames Hogan
Add cpu_has_ftlb, which specifies that an FTLB is present in addition to the VTLB, probed based on whether Config.MT == 4 (rather than 1 for standard JTLB). This is necessary since MIPS release 6 removes Config4.MMUExtDef, so the presence of the FTLB fields in Config4 must be determined from Config.MT instead. Signed-off-by: James Hogan <james.hogan@imgtec.com> Cc: Markos Chandras <markos.chandras@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/11159/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2015-09-22MIPS: ATH79: Add irq chip ar7240-misc-intcAlexander Couzens
The ar7240 misc irq chip use ack handler instead of ack_mask handler. All new ath79 chips use the ar7240 misc irq chip Signed-off-by: Alexander Couzens <lynxis@fe80.eu> Acked-by: Alban Bedel <albeu@free.fr> Acked-by: Thomas Gleixner <tglx@linutronix.de> Cc: linux-mips@linux-mips.org Cc: Rob Herring <robh+dt@kernel.org> Cc: Pawel Moll <pawel.moll@arm.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Ian Campbell <ijc+devicetree@hellion.org.uk> Cc: Kumar Gala <galak@codeaurora.org> Cc: devicetree@vger.kernel.org Cc: Jason Cooper <jason@lakedaemon.net> Cc: Marc Zyngier <marc.zyngier@arm.com> Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/11164/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2015-09-22MIPS: ATH79: Set missing irq ack handler for ar7100-misc-intc irq chipAlexander Couzens
The irq ack handler was forgotten while introducing OF support. Only ar71xx and ar933x based devices require it. Signed-off-by: Alexander Couzens <lynxis@fe80.eu> Acked-by: Alban Bedel <albeu@free.fr> Acked-by: Thomas Gleixner <tglx@linutronix.de> Cc: linux-mips@linux-mips.org Cc: Rob Herring <robh+dt@kernel.org> Cc: Pawel Moll <pawel.moll@arm.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Ian Campbell <ijc+devicetree@hellion.org.uk> Cc: Kumar Gala <galak@codeaurora.org> Cc: devicetree@vger.kernel.org Cc: Jason Cooper <jason@lakedaemon.net> Cc: Marc Zyngier <marc.zyngier@arm.com> Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/11163/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2015-09-22MIPS: BPF: Fix build on pre-R2 little endian CPUsAurelien Jarno
The rotr, seh and wsbh instructions have been introduced with the R2 ISA. Thus the current BPF code fails to build on pre-R2 little endian CPUs: CC arch/mips/net/bpf_jit.o AS arch/mips/net/bpf_jit_asm.o /home/aurel32/linux-4.2/arch/mips/net/bpf_jit_asm.S: Assembler messages: /home/aurel32/linux-4.2/arch/mips/net/bpf_jit_asm.S:67: Error: opcode not supported on this processor: mips32 (mips32) `wsbh $8,$19' /home/aurel32/linux-4.2/arch/mips/net/bpf_jit_asm.S:68: Error: opcode not supported on this processor: mips32 (mips32) `rotr $19,$8,16' /home/aurel32/linux-4.2/arch/mips/net/bpf_jit_asm.S:83: Error: opcode not supported on this processor: mips32 (mips32) `wsbh $8,$19' /home/aurel32/linux-4.2/arch/mips/net/bpf_jit_asm.S:84: Error: opcode not supported on this processor: mips32 (mips32) `seh $19,$8' /home/aurel32/linux-4.2/arch/mips/net/bpf_jit_asm.S:151: Error: opcode not supported on this processor: mips32 (mips32) `wsbh $8,$12' /home/aurel32/linux-4.2/arch/mips/net/bpf_jit_asm.S:153: Error: opcode not supported on this processor: mips32 (mips32) `rotr $19,$8,16' /home/aurel32/linux-4.2/arch/mips/net/bpf_jit_asm.S:164: Error: opcode not supported on this processor: mips32 (mips32) `wsbh $19,$12' /home/aurel32/linux-4.2/scripts/Makefile.build:294: recipe for target 'arch/mips/net/bpf_jit_asm.o' failed Fix that by providing equivalent code for these CPUs. Signed-off-by: Aurelien Jarno <aurelien@aurel32.net> Reviewed-by: Markos Chandras <markos.chandras@imgtec.com> Cc: stable@vger.kernel.org # v4.2+ Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/11098/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2015-09-22MIPS: BPF: Avoid unreachable code on little endianAurelien Jarno
On little endian, avoid generating the big endian version of the code by using #else in addition to #ifdef #endif. Also fix one alignment issue wrt delay slot. Signed-off-by: Aurelien Jarno <aurelien@aurel32.net> Reviewed-by: Markos Chandras <markos.chandras@imgtec.com> Cc: stable@vger.kernel.org # v4.2+ Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/11097/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2015-09-22MIPS: bootmem: Fix mapstart calculation for contiguous mapsAlexander Sverdlin
Commit a6335fa1 fixed the case with gap between initrd and next usable PFN zone, but broken the case when initrd is combined with usable memory into one region (in add_memory_region()). Restore the fixup initially brought in by f9a7febd. ---- error message ---- Unpacking initramfs... Initramfs unpacking failed: junk in compressed archive BUG: Bad page state in process swapper pfn:00261 page:81004c20 count:0 mapcount:-127 mapping: (null) index:0x2 flags: 0x0() page dumped because: nonzero mapcount CPU: 0 PID: 1 Comm: swapper Not tainted 4.2.0+ #1782 ----------------------- Signed-off-by: Alexander Sverdlin <alexander.sverdlin@gmail.com> Reported-by: Tony Wu <tung7970@gmail.com> Tested-by: Tony Wu <tung7970@gmail.com> Cc: David Daney <david.daney@cavium.com> Cc: Zubair Lutfullah Kakakhel <Zubair.Kakakhel@imgtec.com> Cc: Huacai Chen <chenhc@lemote.com> Cc: Joe Perches <joe@perches.com> Cc: Steven J. Hill <Steven.Hill@imgtec.com> Cc: Aaro Koskinen <aaro.koskinen@iki.fi> Cc: stable@vger.kernel.org Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/11086/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2015-09-22MIPS: Fix console output for Fulong2e systemGuenter Roeck
Commit 3adeb2566b9b ("MIPS: Loongson: Improve LEFI firmware interface") made the number of UARTs dynamic if LEFI_FIRMWARE_INTERFACE is configured. Unfortunately, it did not initialize the number of UARTs if LEFI_FIRMWARE_INTERFACE is not configured. As a result, the Fulong2e system has no console. Fixes: 3adeb2566b9b ("MIPS: Loongson: Improve LEFI firmware interface") Acked-by: Huacai Chen <chenhc@lemote.com> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Tested-by: Markos Chandras <markos.chandras@imgtec.com> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/11076/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2015-09-22ARM: wire up new syscallsRussell King
Wire up the new userfaultfd and membarrier syscalls for ARM. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2015-09-21Merge branch 'for-linus' of ↵Linus Torvalds
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 Ellerman
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 Bonzini
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>
2015-09-21KVM: PPC: Book3S: Take the kvm->srcu lock in kvmppc_h_logical_ci_load/store()Thomas Huth
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. Shenoy
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 Mackerras
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 Torvalds
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 Torvalds
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 Torvalds
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 Torvalds
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 Torvalds
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 Mammedov
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 Carstens
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 Carstens
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>