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2017-05-02xen,kdump: handle pv domain in paddr_vmcoreinfo_note()Juergen Gross1-0/+13
For kdump to work correctly it needs the physical address of vmcoreinfo_note. When running as dom0 this means the virtual address has to be translated to the related machine address. paddr_vmcoreinfo_note() is meant to do the translation via __pa_symbol() only, but being attributed "weak" it can be replaced easily in Xen case. Signed-off-by: Juergen Gross <jgross@suse.com> Tested-by: Petr Tesarik <ptesarik@suse.com> Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com> Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com> Signed-off-by: Juergen Gross <jgross@suse.com>
2017-05-02x86/xen: remove unused static function from smp_pv.cJuergen Gross1-10/+0
xen_call_function_interrupt() isn't used in smp_pv.c. Remove it. Signed-off-by: Juergen Gross <jgross@suse.com>
2017-05-02x86/xen: rename some PV-only functions in smp_pv.cVitaly Kuznetsov1-14/+14
After code split between PV and HVM some functions in xen_smp_ops have xen_pv_ prefix and some only xen_ which makes them look like they're common for both PV and HVM while they're not. Rename all the rest to have xen_pv_ prefix. Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Reviewed-by: Juergen Gross <jgross@suse.com> Signed-off-by: Juergen Gross <jgross@suse.com>
2017-05-02x86/xen: enable PVHVM-only buildsVitaly Kuznetsov2-4/+9
Now everything is in place and we can move PV-only code under CONFIG_XEN_PV. CONFIG_XEN_PV_SMP is created to support the change. Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Reviewed-by: Juergen Gross <jgross@suse.com> Signed-off-by: Juergen Gross <jgross@suse.com>
2017-05-02x86/xen: create stubs for HVM-only builds in page.hVitaly Kuznetsov1-0/+25
__pfn_to_mfn() is only used from PV code (mmu_pv.c, p2m.c) and from page.h where all functions calling it check for xen_feature(XENFEAT_auto_translated_physmap) first so we can replace it with any stub to make build happy. set_foreign_p2m_mapping()/clear_foreign_p2m_mapping() are used from grant-table.c but only if !xen_feature(XENFEAT_auto_translated_physmap). Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Reviewed-by: Juergen Gross <jgross@suse.com> Signed-off-by: Juergen Gross <jgross@suse.com>
2017-05-02x86/xen: define startup_xen for XEN PV onlyVitaly Kuznetsov1-0/+4
startup_xen references PV-only code, decorate it with #ifdef CONFIG_XEN_PV to make PV-free builds possible. Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Reviewed-by: Juergen Gross <jgross@suse.com> Signed-off-by: Juergen Gross <jgross@suse.com>
2017-05-02x86/xen: put setup.c, pmu.c and apic.c under CONFIG_XEN_PVVitaly Kuznetsov3-4/+9
xen_pmu_init/finish() functions are used in suspend.c and enlighten.c, add stubs for now. Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Reviewed-by: Juergen Gross <jgross@suse.com> Signed-off-by: Juergen Gross <jgross@suse.com>
2017-05-02x86/xen: split suspend.c for PV and PVHVM guestsVitaly Kuznetsov5-55/+83
Slit the code in suspend.c into suspend_pv.c and suspend_hvm.c. Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Reviewed-by: Juergen Gross <jgross@suse.com> Signed-off-by: Juergen Gross <jgross@suse.com>
2017-05-02x86/xen: split off mmu_pv.cVitaly Kuznetsov3-2714/+2721
Basically, mmu.c is renamed to mmu_pv.c and some code moved out to common mmu.c. Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Reviewed-by: Juergen Gross <jgross@suse.com> Signed-off-by: Juergen Gross <jgross@suse.com>
2017-05-02x86/xen: split off mmu_hvm.cVitaly Kuznetsov3-75/+80
Move PVHVM related code to mmu_hvm.c. Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Reviewed-by: Juergen Gross <jgross@suse.com> Signed-off-by: Juergen Gross <jgross@suse.com>
2017-05-02x86/xen: split off smp_pv.cVitaly Kuznetsov4-486/+509
Basically, smp.c is renamed to smp_pv.c and some code moved out to common smp.c. struct xen_common_irq delcaration ended up in smp.h. Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Reviewed-by: Juergen Gross <jgross@suse.com> Signed-off-by: Juergen Gross <jgross@suse.com>
2017-05-02x86/xen: split off smp_hvm.cVitaly Kuznetsov5-54/+69
Move PVHVM related code to smp_hvm.c. Drop 'static' qualifier from xen_smp_send_reschedule(), xen_smp_send_call_function_ipi(), xen_smp_send_call_function_single_ipi(), these functions will be moved to common smp code when smp_pv.c is split. Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Reviewed-by: Juergen Gross <jgross@suse.com> Signed-off-by: Juergen Gross <jgross@suse.com>
2017-05-02x86/xen: split xen_cpu_die()Vitaly Kuznetsov1-6/+20
Split xen_cpu_die() into xen_pv_cpu_die() and xen_hvm_cpu_die() to support further splitting of smp.c. Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Reviewed-by: Juergen Gross <jgross@suse.com> Signed-off-by: Juergen Gross <jgross@suse.com>
2017-05-02x86/xen: split xen_smp_prepare_boot_cpu()Vitaly Kuznetsov1-19/+30
Split xen_smp_prepare_boot_cpu() into xen_pv_smp_prepare_boot_cpu() and xen_hvm_smp_prepare_boot_cpu() to support further splitting of smp.c. Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Reviewed-by: Juergen Gross <jgross@suse.com> Signed-off-by: Juergen Gross <jgross@suse.com>
2017-05-02x86/xen: split xen_smp_intr_init()/xen_smp_intr_free()Vitaly Kuznetsov3-11/+35
xen_smp_intr_init() and xen_smp_intr_free() have PV-specific code and as a praparatory change to splitting smp.c we need to split these fucntions. Create xen_smp_intr_init_pv()/xen_smp_intr_free_pv(). Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Reviewed-by: Juergen Gross <jgross@suse.com> Signed-off-by: Juergen Gross <jgross@suse.com>
2017-05-02x86/xen: split off enlighten_pv.cVitaly Kuznetsov3-1528/+1538
Basically, enlighten.c is renamed to enlighten_pv.c and some code moved out to common enlighten.c. Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Reviewed-by: Juergen Gross <jgross@suse.com> Signed-off-by: Juergen Gross <jgross@suse.com>
2017-05-02x86/xen: split off enlighten_hvm.cVitaly Kuznetsov4-207/+227
Move PVHVM related code to enlighten_hvm.c. Three functions: xen_cpuhp_setup(), xen_reboot(), xen_emergency_restart() are shared, drop static qualifier from them. These functions will go to common code once it is split from enlighten.c. Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Reviewed-by: Juergen Gross <jgross@suse.com> Signed-off-by: Juergen Gross <jgross@suse.com>
2017-05-02x86/xen: split off enlighten_pvh.cVitaly Kuznetsov3-108/+116
Create enlighten_pvh.c by splitting off PVH related code from enlighten.c, put it under CONFIG_XEN_PVH. Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Reviewed-by: Juergen Gross <jgross@suse.com> Signed-off-by: Juergen Gross <jgross@suse.com>
2017-05-02x86/xen: add CONFIG_XEN_PV to KconfigVitaly Kuznetsov3-7/+22
All code to support Xen PV will get under this new option. For the beginning, check for it in the common code. Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Reviewed-by: Juergen Gross <jgross@suse.com> Signed-off-by: Juergen Gross <jgross@suse.com>
2017-05-02x86/xen: globalize have_vcpu_info_placementVitaly Kuznetsov2-6/+8
have_vcpu_info_placement applies to both PV and HVM and as we're going to split the code we need to make it global. Rename to xen_have_vcpu_info_placement. Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Reviewed-by: Juergen Gross <jgross@suse.com> Signed-off-by: Juergen Gross <jgross@suse.com>
2017-05-02x86/xen: separate PV and HVM hypervisorsVitaly Kuznetsov3-41/+79
As a preparation to splitting the code we need to untangle it: x86_hyper_xen -> x86_hyper_xen_hvm and x86_hyper_xen_pv xen_platform() -> xen_platform_hvm() and xen_platform_pv() xen_cpu_up_prepare() -> xen_cpu_up_prepare_pv() and xen_cpu_up_prepare_hvm() xen_cpu_dead() -> xen_cpu_dead_pv() and xen_cpu_dead_pv_hvm() Add two parameters to xen_cpuhp_setup() to pass proper cpu_up_prepare and cpu_dead hooks. xen_set_cpu_features() is now PV-only so the redundant xen_pv_domain() check can be dropped. Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Reviewed-by: Juergen Gross <jgross@suse.com> Signed-off-by: Juergen Gross <jgross@suse.com>
2017-05-01Merge branch 'x86-mm-for-linus' of ↵Linus Torvalds77-628/+1544
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 mm updates from Ingo Molnar: "The main x86 MM changes in this cycle were: - continued native kernel PCID support preparation patches to the TLB flushing code (Andy Lutomirski) - various fixes related to 32-bit compat syscall returning address over 4Gb in applications, launched from 64-bit binaries - motivated by C/R frameworks such as Virtuozzo. (Dmitry Safonov) - continued Intel 5-level paging enablement: in particular the conversion of x86 GUP to the generic GUP code. (Kirill A. Shutemov) - x86/mpx ABI corner case fixes/enhancements (Joerg Roedel) - ... plus misc updates, fixes and cleanups" * 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (62 commits) mm, zone_device: Replace {get, put}_zone_device_page() with a single reference to fix pmem crash x86/mm: Fix flush_tlb_page() on Xen x86/mm: Make flush_tlb_mm_range() more predictable x86/mm: Remove flush_tlb() and flush_tlb_current_task() x86/vm86/32: Switch to flush_tlb_mm_range() in mark_screen_rdonly() x86/mm/64: Fix crash in remove_pagetable() Revert "x86/mm/gup: Switch GUP to the generic get_user_page_fast() implementation" x86/boot/e820: Remove a redundant self assignment x86/mm: Fix dump pagetables for 4 levels of page tables x86/mpx, selftests: Only check bounds-vs-shadow when we keep shadow x86/mpx: Correctly report do_mpx_bt_fault() failures to user-space Revert "x86/mm/numa: Remove numa_nodemask_from_meminfo()" x86/espfix: Add support for 5-level paging x86/kasan: Extend KASAN to support 5-level paging x86/mm: Add basic defines/helpers for CONFIG_X86_5LEVEL=y x86/paravirt: Add 5-level support to the paravirt code x86/mm: Define virtual memory map for 5-level paging x86/asm: Remove __VIRTUAL_MASK_SHIFT==47 assert x86/boot: Detect 5-level paging support x86/mm/numa: Remove numa_nodemask_from_meminfo() ...
2017-05-01Merge branch 'x86-vdso-for-linus' of ↵Linus Torvalds8-36/+107
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 vdso updates from Ingo Molnar: "Add support for vDSO acceleration of the "Hyper-V TSC page", to speed up clock reading on Hyper-V guests" * 'x86-vdso-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/vdso: Add VCLOCK_HVCLOCK vDSO clock read method x86/hyperv: Move TSC reading method to asm/mshyperv.h x86/hyperv: Implement hv_get_tsc_page()
2017-05-01Merge branch 'x86-platform-for-linus' of ↵Linus Torvalds4-89/+299
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 platform updates from Ingo Molnar: "Most of the commits are continued SGI UV4 hardware-enablement changes, plus there's also new Bluetooth support for the Intel Edison platform" * 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/platform/intel-mid: Enable Bluetooth support on Intel Edison x86/platform/uv/BAU: Implement uv4_wait_completion with read_status x86/platform/uv/BAU: Add wait_completion to bau_operations x86/platform/uv/BAU: Add status mmr location fields to bau_control x86/platform/uv/BAU: Cleanup bau_operations declaration and instances x86/platform/uv/BAU: Add payload descriptor qualifier x86/platform/uv/BAU: Add uv_bau_version enumerated constants
2017-05-01Merge branch 'x86-irq-for-linus' of ↵Linus Torvalds1-2/+7
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 irq update from Ingo Molnar: "A single commit that micro-optimizes an IRQ vectors code path in the CPU offlining code" * 'x86-irq-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/irq: Optimize free vector check in the CPU offline path
2017-05-01Merge branch 'x86-debug-for-linus' of ↵Linus Torvalds3-2/+56
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 debug updates from Ingo Molnar: "The biggest update is the addition of USB3 debug port based early-console. Greg was fine with the USB changes and with the routing of these patches: https://www.spinics.net/lists/linux-usb/msg155093.html" * 'x86-debug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: usb/doc: Add document for USB3 debug port usage usb/serial: Add DBC debug device support to usb_debug x86/earlyprintk: Add support for earlyprintk via USB3 debug port usb/early: Add driver for xhci debug capability x86/timers: Add simple udelay calibration
2017-05-01Merge branch 'x86-cleanups-for-linus' of ↵Linus Torvalds3-26/+16
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 cleanups from Ingo Molnar: "A handful of small cleanups" * 'x86-cleanups-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/irq: Remove a redundant #ifdef directive x86/smp: Remove the redundant #ifdef CONFIG_SMP directive x86/smp: Reduce code duplication x86/pci-calgary: Use setup_timer() instead of open coding it.
2017-05-01Merge branch 'x86-build-for-linus' of ↵Linus Torvalds1-2/+2
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 build update from Ingo Molnar: "A single CLang support related fix" * 'x86-build-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/kbuild: Use cc-option to enable -falign-{jumps/loops}
2017-05-01Merge branch 'x86-asm-for-linus' of ↵Linus Torvalds34-387/+550
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 asm updates from Ingo Molnar: "The main changes in this cycle were: - unwinder fixes and enhancements - improve ftrace interaction with the unwinder - optimize the code footprint of WARN() and related debugging constructs - ... plus misc updates, cleanups and fixes" * 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (24 commits) x86/unwind: Dump all stacks in unwind_dump() x86/unwind: Silence more entry-code related warnings x86/ftrace: Fix ebp in ftrace_regs_caller that screws up unwinder x86/unwind: Remove unused 'sp' parameter in unwind_dump() x86/unwind: Prepend hex mask value with '0x' in unwind_dump() x86/unwind: Properly zero-pad 32-bit values in unwind_dump() x86/unwind: Ensure stack pointer is aligned debug: Avoid setting BUGFLAG_WARNING twice x86/unwind: Silence entry-related warnings x86/unwind: Read stack return address in update_stack_state() x86/unwind: Move common code into update_stack_state() debug: Fix __bug_table[] in arch linker scripts debug: Add _ONCE() logic to report_bug() x86/debug: Define BUG() again for !CONFIG_BUG x86/debug: Implement __WARN() using UD0 x86/ftrace: Use Makefile logic instead of #ifdef for compiling ftrace_*.o x86/ftrace: Add -mfentry support to x86_32 with DYNAMIC_FTRACE set x86/ftrace: Clean up ftrace_regs_caller x86/ftrace: Add stack frame pointer to ftrace_caller x86/ftrace: Move the ftrace specific code out of entry_32.S ...
2017-05-01Merge branch 'x86-apic-for-linus' of ↵Linus Torvalds2-9/+4
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 apic updates from Ingo Molnar: "Two small cleanups" * 'x86-apic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/apic: Fix a comment in init_apic_mappings() x86/apic: Remove the SET_APIC_ID(x) macro
2017-05-01Merge branch 'x86-cpu-for-linus' of ↵Linus Torvalds12-256/+603
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 cpu updates from Ingo Molnar: "The biggest changes are an extension of the Intel RDT code to extend it with Intel Memory Bandwidth Allocation CPU support: MBA allows bandwidth allocation between cores, while CBM (already upstream) allows CPU cache partitioning. There's also misc smaller fixes and updates" * 'x86-cpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (23 commits) x86/intel_rdt: Return error for incorrect resource names in schemata x86/intel_rdt: Trim whitespace while parsing schemata input x86/intel_rdt: Fix padding when resource is enabled via mount x86/intel_rdt: Get rid of anon union x86/cpu: Keep model defines sorted by model number x86/intel_rdt/mba: Add schemata file support for MBA x86/intel_rdt: Make schemata file parsers resource specific x86/intel_rdt/mba: Add info directory files for Memory Bandwidth Allocation x86/intel_rdt: Make information files resource specific x86/intel_rdt/mba: Add primary support for Memory Bandwidth Allocation (MBA) x86/intel_rdt/mba: Memory bandwith allocation feature detect x86/intel_rdt: Add resource specific msr update function x86/intel_rdt: Move CBM specific data into a struct x86/intel_rdt: Cleanup namespace to support multiple resource types Documentation, x86: Intel Memory bandwidth allocation x86/intel_rdt: Organize code properly x86/intel_rdt: Init padding only if a device exists x86/intel_rdt: Add cpus_list rdtgroup file x86/intel_rdt: Cleanup kernel-doc x86/intel_rdt: Update schemata read to show data in tabular format ...
2017-05-01Merge branch 'x86-boot-for-linus' of ↵Linus Torvalds67-885/+1062
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 boot updates from Ingo Molnar: "The biggest changes in this cycle were: - reworking of the e820 code: separate in-kernel and boot-ABI data structures and apply a whole range of cleanups to the kernel side. No change in functionality. - enable KASLR by default: it's used by all major distros and it's out of the experimental stage as well. - ... misc fixes and cleanups" * 'x86-boot-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (63 commits) x86/KASLR: Fix kexec kernel boot crash when KASLR randomization fails x86/reboot: Turn off KVM when halting a CPU x86/boot: Fix BSS corruption/overwrite bug in early x86 kernel startup x86: Enable KASLR by default boot/param: Move next_arg() function to lib/cmdline.c for later reuse x86/boot: Fix Sparse warning by including required header file x86/boot/64: Rename start_cpu() x86/xen: Update e820 table handling to the new core x86 E820 code x86/boot: Fix pr_debug() API braindamage xen, x86/headers: Add <linux/device.h> dependency to <asm/xen/page.h> x86/boot/e820: Simplify e820__update_table() x86/boot/e820: Separate the E820 ABI structures from the in-kernel structures x86/boot/e820: Fix and clean up e820_type switch() statements x86/boot/e820: Rename the remaining E820 APIs to the e820__*() prefix x86/boot/e820: Remove unnecessary #include's x86/boot/e820: Rename e820_mark_nosave_regions() to e820__register_nosave_regions() x86/boot/e820: Rename e820_reserve_resources*() to e820__reserve_resources*() x86/boot/e820: Use bool in query APIs x86/boot/e820: Document e820__reserve_setup_data() x86/boot/e820: Clean up __e820__update_table() et al ...
2017-05-01Merge branch 'ras-core-for-linus' of ↵Linus Torvalds10-433/+580
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull RAS updates from Ingo Molnar: "The main changes in this cycle were: - add the 'Corrected Errors Collector' kernel feature which collect and monitor correctable errors statistics and will preemptively (soft-)offline physical pages that have a suspiciously high error count. - handle MCE errors during kexec() more gracefully - factor out and deprecate the /dev/mcelog driver - ... plus misc fixes and cleanpus" * 'ras-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/mce: Check MCi_STATUS[MISCV] for usable addr on Intel only ACPI/APEI: Use setup_deferrable_timer() x86/mce: Update notifier priority check x86/mce: Enable PPIN for Knights Landing/Mill x86/mce: Do not register notifiers with invalid prio x86/mce: Factor out and deprecate the /dev/mcelog driver RAS: Add a Corrected Errors Collector x86/mce: Rename mce_log to mce_log_buffer x86/mce: Rename mce_log()'s argument x86/mce: Init some CPU features early x86/mce: Handle broadcasted MCE gracefully with kexec
2017-05-01Merge branch 'perf-core-for-linus' of ↵Linus Torvalds14-346/+423
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull perf updates from Ingo Molnar: "The main changes in this cycle were: Kernel side changes: - Kprobes and uprobes changes: - Make their trampolines read-only while they are used - Make UPROBES_EVENTS default-y which is the distro practice - Apply misc fixes and robustization to probe point insertion. - add support for AMD IOMMU events - extend hw events on Intel Goldmont CPUs - ... plus misc fixes and updates. Tooling side changes: - support s390 jump instructions in perf annotate (Christian Borntraeger) - vendor hardware events updates (Andi Kleen) - add argument support for SDT events in powerpc (Ravi Bangoria) - beautify the statx syscall arguments in 'perf trace' (Arnaldo Carvalho de Melo) - handle inline functions in callchains (Jin Yao) - enable sorting by srcline as key (Milian Wolff) - add 'brstackinsn' field in 'perf script' to reuse the x86 instruction decoder used in the Intel PT code to study hot paths to samples (Andi Kleen) - add PERF_RECORD_NAMESPACES so that the kernel can record information required to associate samples to namespaces, helping in container problem characterization. (Hari Bathini) - allow sorting by symbol_size in 'perf report' and 'perf top' (Charles Baylis) - in perf stat, make system wide (-a) the default option if no target was specified and one of following conditions is met: - no workload specified (current behaviour) - a workload is specified but all requested events are system wide ones, like uncore ones. (Jiri Olsa) - ... plus lots of other updates, enhancements, cleanups and fixes" * 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (235 commits) perf tools: Fix the code to strip command name tools arch x86: Sync cpufeatures.h tools arch: Sync arch/x86/lib/memcpy_64.S with the kernel tools: Update asm-generic/mman-common.h copy from the kernel perf tools: Use just forward declarations for struct thread where possible perf tools: Add the right header to obtain PERF_ALIGN() perf tools: Remove poll.h and wait.h from util.h perf tools: Remove string.h, unistd.h and sys/stat.h from util.h perf tools: Remove stale prototypes from builtin.h perf tools: Remove string.h from util.h perf tools: Remove sys/ioctl.h from util.h perf tools: Remove a few more needless includes from util.h perf tools: Include sys/param.h where needed perf callchain: Move callchain specific routines from util.[ch] perf tools: Add compress.h for the *_decompress_to_file() headers perf mem: Fix display of data source snoop indication perf debug: Move dump_stack() and sighandler_dump_stack() to debug.h perf kvm: Make function only used by 'perf kvm' static perf tools: Move timestamp routines from util.h to time-utils.h perf tools: Move units conversion/formatting routines to separate object ...
2017-05-01Merge branch 'x86-process-for-linus' of ↵Linus Torvalds19-88/+251
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pul x86/process updates from Ingo Molnar: "The main change in this cycle was to add the ARCH_[GET|SET]_CPUID prctl() ABI extension to control the availability of the CPUID instruction, analogously to the existing PR_GET|SET_TSC ABI that controls RDTSC. Motivation: the 'rr' user-space record-and-replay execution debugger would like to trap and emulate the CPUID instruction - which instruction is normally unprivileged. Trapping CPUID is possible on IvyBridge and later Intel CPUs - expose this hardware capability" * 'x86-process-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/syscalls/32: Ignore arch_prctl for other architectures um/arch_prctl: Fix fallout from x86 arch_prctl() rework x86/arch_prctl: Add ARCH_[GET|SET]_CPUID x86/cpufeature: Detect CPUID faulting support x86/syscalls/32: Wire up arch_prctl on x86-32 x86/arch_prctl: Add do_arch_prctl_common() x86/arch_prctl/64: Rename do_arch_prctl() to do_arch_prctl_64() x86/arch_prctl/64: Use SYSCALL_DEFINE2 to define sys_arch_prctl() x86/arch_prctl: Rename 'code' argument to 'option' x86/msr: Rename MISC_FEATURE_ENABLES to MISC_FEATURES_ENABLES x86/process: Optimize TIF_NOTSC switch x86/process: Correct and optimize TIF_BLOCKSTEP switch x86/process: Optimize TIF checks in __switch_to_xtra()
2017-05-01Merge branch 'locking-core-for-linus' of ↵Linus Torvalds3-45/+104
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull locking updates from Ingo Molnar: "The main changes in this cycle were: - a big round of FUTEX_UNLOCK_PI improvements, fixes, cleanups and general restructuring - lockdep updates such as new checks for lock_downgrade() - introduce the new atomic_try_cmpxchg() locking API and use it to optimize refcount code generation - ... plus misc fixes, updates and cleanups" * 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (38 commits) MAINTAINERS: Add FUTEX SUBSYSTEM futex: Clarify mark_wake_futex memory barrier usage futex: Fix small (and harmless looking) inconsistencies futex: Avoid freeing an active timer rtmutex: Plug preempt count leak in rt_mutex_futex_unlock() rtmutex: Fix more prio comparisons rtmutex: Fix PI chain order integrity sched,tracing: Update trace_sched_pi_setprio() sched/rtmutex: Refactor rt_mutex_setprio() rtmutex: Clean up sched/deadline/rtmutex: Dont miss the dl_runtime/dl_period update sched/rtmutex/deadline: Fix a PI crash for deadline tasks rtmutex: Deboost before waking up the top waiter locking/ww-mutex: Limit stress test to 2 seconds locking/atomic: Fix atomic_try_cmpxchg() semantics lockdep: Fix per-cpu static objects futex: Drop hb->lock before enqueueing on the rtmutex futex: Futex_unlock_pi() determinism futex: Rework futex_lock_pi() to use rt_mutex_*_proxy_lock() futex,rt_mutex: Restructure rt_mutex_finish_proxy_lock() ...
2017-05-01Merge branch 'sched-core-for-linus' of ↵Linus Torvalds6-77/+44
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull scheduler updates from Ingo Molnar: "The main changes in this cycle were: - another round of rq-clock handling debugging, robustization and fixes - PELT accounting improvements - CPU hotplug related ->cpus_allowed affinity handling fixes all around the tree - ... plus misc fixes, cleanups and updates" * 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (35 commits) sched/x86: Update reschedule warning text crypto: N2 - Replace racy task affinity logic cpufreq/sparc-us2e: Replace racy task affinity logic cpufreq/sparc-us3: Replace racy task affinity logic cpufreq/sh: Replace racy task affinity logic cpufreq/ia64: Replace racy task affinity logic ACPI/processor: Replace racy task affinity logic ACPI/processor: Fix error handling in __acpi_processor_start() sparc/sysfs: Replace racy task affinity logic powerpc/smp: Replace open coded task affinity logic ia64/sn/hwperf: Replace racy task affinity logic ia64/salinfo: Replace racy task affinity logic workqueue: Provide work_on_cpu_safe() ia64/topology: Remove cpus_allowed manipulation sched/fair: Move the PELT constants into a generated header sched/fair: Increase PELT accuracy for small tasks sched/fair: Fix comments sched/Documentation: Add 'sched-pelt' tool sched/fair: Fix corner case in __accumulate_sum() sched/core: Remove 'task' parameter and rename tsk_restore_flags() to current_restore_flags() ...
2017-05-01Merge branch 'efi-core-for-linus' of ↵Linus Torvalds7-94/+40
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull EFI updates from Ingo Molnar: "The main changes in this cycle were: - move BGRT handling to drivers/acpi so it can be shared between x86 and ARM - bring the EFI stub's initrd and FDT allocation logic in line with the latest changes to the arm64 boot protocol - improvements and fixes to the EFI stub's command line parsing routines - randomize the virtual mapping of the UEFI runtime services on ARM/arm64 - ... and other misc enhancements, cleanups and fixes" * 'efi-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: efi/libstub/arm: Don't use TASK_SIZE when randomizing the RT space ef/libstub/arm/arm64: Randomize the base of the UEFI rt services region efi/libstub/arm/arm64: Disable debug prints on 'quiet' cmdline arg efi/libstub: Unify command line param parsing efi/libstub: Fix harmless command line parsing bug efi/arm32-stub: Allow boot-time allocations in the vmlinux region x86/efi: Clean up a minor mistake in comment efi/pstore: Return error code (if any) from efi_pstore_write() efi/bgrt: Enable ACPI BGRT handling on arm64 x86/efi/bgrt: Move efi-bgrt handling out of arch/x86 efi/arm-stub: Round up FDT allocation to mapping size efi/arm-stub: Correct FDT and initrd allocation rules for arm64
2017-05-01Merge branch 'timers-core-for-linus' of ↵Linus Torvalds41-19/+196
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull timer updates from Thomas Gleixner: "The timer departement delivers: - more year 2038 rework - a massive rework of the arm achitected timer - preparatory patches to allow NTP correction of clock event devices to avoid early expiry - the usual pile of fixes and enhancements all over the place" * 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (91 commits) timer/sysclt: Restrict timer migration sysctl values to 0 and 1 arm64/arch_timer: Mark errata handlers as __maybe_unused Clocksource/mips-gic: Remove redundant non devicetree init MIPS/Malta: Probe gic-timer via devicetree clocksource: Use GENMASK_ULL in definition of CLOCKSOURCE_MASK acpi/arm64: Add SBSA Generic Watchdog support in GTDT driver clocksource: arm_arch_timer: add GTDT support for memory-mapped timer acpi/arm64: Add memory-mapped timer support in GTDT driver clocksource: arm_arch_timer: simplify ACPI support code. acpi/arm64: Add GTDT table parse driver clocksource: arm_arch_timer: split MMIO timer probing. clocksource: arm_arch_timer: add structs to describe MMIO timer clocksource: arm_arch_timer: move arch_timer_needs_of_probing into DT init call clocksource: arm_arch_timer: refactor arch_timer_needs_probing clocksource: arm_arch_timer: split dt-only rate handling x86/uv/time: Set ->min_delta_ticks and ->max_delta_ticks unicore32/time: Set ->min_delta_ticks and ->max_delta_ticks um/time: Set ->min_delta_ticks and ->max_delta_ticks tile/time: Set ->min_delta_ticks and ->max_delta_ticks score/time: Set ->min_delta_ticks and ->max_delta_ticks ...
2017-05-01Merge branch 'irq-core-for-linus' of ↵Linus Torvalds1-1/+1
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull irq updates from Thomas Gleixner: "Nothing exciting from the irq side for this merge window: - a new driver for a Mediatek SoC - ACPI support for ARM GICV3 - support for shared nested interrupts - the usual pile of fixes and updates all over te place" * 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (28 commits) irqchip/mbigen: Fix return value check in mbigen_device_probe() irqchip/mips-gic: Replace static map with dynamic irqchip/mips-gic: Remove device IRQ domain irqchip/mips-gic: Separate IPI reservation & usage tracking genirq: Use irqd_get_trigger_type to compare the trigger type for shared IRQs genirq: Use cpumask_available() for check of cpumask variable cpumask: Add helper cpumask_available() irqchip/irq-imx-gpcv2: Clear OF_POPULATED flag irqchip/atmel-aic5: Handle suspend to RAM irqchip: Add Mediatek mtk-cirq driver dt-bindings: mtk-cirq: Add binding document irqchip/gic-v3-its: Add IORT hook for platform MSI support irqchip/mbigen: Add ACPI support irqchip/mbigen: Introduce mbigen_of_create_domain() irqchip/mbigen: Drop module owner platform-msi: Make platform_msi_create_device_domain() ACPI aware irqchip/gicv3-its: platform-msi: Scan MADT to create platform msi domain irqchip/gicv3-its: platform-msi: Refactor its_pmsi_init() to prepare for ACPI irqchip/gicv3-its: platform-msi: Refactor its_pmsi_prepare() irqchip/gic-v3-its: Keep the include header files in alphabetic order ...
2017-05-01Merge branch 'for-linus' of ↵Linus Torvalds223-26988/+0
git://git.kernel.org/pub/scm/linux/kernel/git/egtvedt/linux-avr32 Pull AVR32 removal from Hans-Christian Noren Egtvedt: "This will remove support for AVR32 architecture from the kernel and clean away the most obvious architecture related parts. Removing dead code in drivers is the next step" Notes from previous discussion about this: "The AVR32 architecture is not keeping up with the development of the kernel, and since it shares so much of the drivers with Atmel ARM SoC, it is starting to hinder these drivers to develop swiftly. Also, all AVR32 AP7 SoC processors are end of lifed from Atmel (now Microchip). Finally, the GCC toolchain is stuck at version 4.2.x, and has not received any patches since the last release from Atmel; 4.2.4-atmel.1.1.3.avr32linux.1. When building kernel v4.10, this toolchain is no longer able to properly link the network stack. Haavard and I have came to the conclusion that we feel keeping AVR32 on life support offers more obstacles for Atmel ARMs, than it gives joy to AVR32 users. I also suspect there are very few AVR32 users left today, if anybody at all" That discussion was acked by Andy Shevchenko, Boris Brezillon, Nicolas Ferre, and Haavard Skinnemoen. * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/egtvedt/linux-avr32: mm: remove AVR32 arch special handling in mm/Kconfig lib: remove check for AVR32 arch in test_user_copy lib: remove AVR32 entry in Kconfig.debug compile with frame pointers scripts: remove AVR32 support from checkstack.pl docs: remove all references to AVR32 architecture avr32: remove support for AVR32 architecture
2017-05-01ia64: fix module loading for gcc-5.4Sergei Trofimovich1-2/+2
Starting from gcc-5.4+ gcc generates MLX instructions in more cases to refer local symbols: https://gcc.gnu.org/PR60465 That caused ia64 module loader to choke on such instructions: fuse: invalid slot number 1 for IMM64 The Linux kernel used to handle only case where relocation pointed to slot=2 instruction in the bundle. That limitation was fixed in linux by commit 9c184a073bfd ("[IA64] Fix 2.6 kernel for the new ia64 assembler") See http://sources.redhat.com/bugzilla/show_bug.cgi?id=1433 This change lifts the slot=2 restriction from the kernel module loader. Tested on 'fuse' and 'btrfs' kernel modules. Cc: Markus Elfring <elfring@users.sourceforge.net> Cc: H J Lu <hjl.tools@gmail.com> Cc: Fenghua Yu <fenghua.yu@intel.com> Cc: Andrew Morton <akpm@linux-foundation.org> Bug: https://bugs.gentoo.org/601014 Tested-by: Émeric MASCHINO <emeric.maschino@gmail.com> Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org> Signed-off-by: Tony Luck <tony.luck@intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-05-01Merge branch 'work.uaccess' of ↵Linus Torvalds159-4129/+1188
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs Pull uaccess unification updates from Al Viro: "This is the uaccess unification pile. It's _not_ the end of uaccess work, but the next batch of that will go into the next cycle. This one mostly takes copy_from_user() and friends out of arch/* and gets the zero-padding behaviour in sync for all architectures. Dealing with the nocache/writethrough mess is for the next cycle; fortunately, that's x86-only. Same for cleanups in iov_iter.c (I am sold on access_ok() in there, BTW; just not in this pile), same for reducing __copy_... callsites, strn*... stuff, etc. - there will be a pile about as large as this one in the next merge window. This one sat in -next for weeks. -3KLoC" * 'work.uaccess' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (96 commits) HAVE_ARCH_HARDENED_USERCOPY is unconditional now CONFIG_ARCH_HAS_RAW_COPY_USER is unconditional now m32r: switch to RAW_COPY_USER hexagon: switch to RAW_COPY_USER microblaze: switch to RAW_COPY_USER get rid of padding, switch to RAW_COPY_USER ia64: get rid of copy_in_user() ia64: sanitize __access_ok() ia64: get rid of 'segment' argument of __do_{get,put}_user() ia64: get rid of 'segment' argument of __{get,put}_user_check() ia64: add extable.h powerpc: get rid of zeroing, switch to RAW_COPY_USER esas2r: don't open-code memdup_user() alpha: fix stack smashing in old_adjtimex(2) don't open-code kernel_setsockopt() mips: switch to RAW_COPY_USER mips: get rid of tail-zeroing in primitives mips: make copy_from_user() zero tail explicitly mips: clean and reorder the forest of macros... mips: consolidate __invoke_... wrappers ...
2017-05-01Merge tag 'pm-4.12-rc1' of ↵Linus Torvalds1-5/+0
git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm Pull power management updates from Rafael Wysocki: "This time the majority of changes go to the cpufreq subsystem (and to the intel_pstate driver in particular) and there are some updates in the generic power domains framework, cpuidle, tools and a couple of other places. One thing worth mentioning is that the intel_pstate's sysfs interface has been reworked to be more consistent with the general expectations of the cpufreq core and less confusing, hopefully for the better. Also, we have a new cpufreq driver for Tegra186 and new hardware support in intel_pstata and the Mediatek cpufreq driver. Apart from that, the AnalyzeSuspend utility for system suspend profiling gets a companion called AnalyzeBoot for the analogous profiling of system boot and they both go into one place under tools/power/pm-graph/. The rest is mostly fixes, cleanups and code reorganization. Specifics: - Rework the intel_pstate driver's sysfs interface to make it more straightforward and more intuitive (Rafael Wysocki). - Make intel_pstate support all processors which advertise HWP (hardware-managed P-states) to the kernel in all operation modes and make it use the load-based P-state selection algorithm on a wider range of systems in the active mode (Rafael Wysocki). - Add cpufreq driver for Tegra186 (Mikko Perttunen). - Add support for Gemini Lake SoCs to intel_pstate (David Box). - Add support for MT8176 and MT817x to the Mediatek cpufreq driver and clean up that driver a bit (Daniel Kurtz). - Clean up intel_pstate and optimize it slightly (Rafael Wysocki). - Update the schedutil cpufreq governor, mostly to fix a couple of issues with it related to specific workloads, and rework its sysfs tunable and initialization a bit (Rafael Wysocki, Viresh Kumar). - Fix minor issues in the imx6q, dbx500 and qoriq cpufreq drivers (Christophe Jaillet, Irina Tirdea, Leonard Crestez, Viresh Kumar, YuanTian Tang). - Add file patterns for cpufreq DT bindings to MAINTAINERS (Geert Uytterhoeven). - Add support for "always on" power domains to the genpd (generic power domains) framework and clean up that code somewhat (Ulf Hansson, Lina Iyer, Viresh Kumar). - Fix minor issues in the powernv cpuidle driver and clean it up (Anton Blanchard, Gautham Shenoy). - Move the AnalyzeSuspend utility under tools/power/pm-graph/ and add an analogous boot-profiling utility called AnalyzeBoot to it (Todd Brandt). - Add rk3328 support to the rockchip-io AVS (Adaptive Voltage Scaling) driver (David Wu). - Fix minor issues in the cpuidle core, the intel_pstate_tracer utility, the devfreq framework and the PM core documentation (Chanwoo Choi, Doug Smythies, Johan Hovold, Marcin Nowakowski)" * tag 'pm-4.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (56 commits) PM / runtime: Document autosuspend-helper side effects PM / runtime: Fix autosuspend documentation tools: power: pm-graph: Package makefile and man pages tools: power: pm-graph: AnalyzeBoot v2.0 tools: power: pm-graph: AnalyzeSuspend v4.6 cpufreq: Add Tegra186 cpufreq driver cpufreq: imx6q: Fix error handling code cpufreq: imx6q: Set max suspend_freq to avoid changes during suspend cpufreq: imx6q: Fix handling EPROBE_DEFER from regulator cpuidle: powernv: Avoid a branch in the core snooze_loop() loop cpuidle: powernv: Don't continually set thread priority in snooze_loop() cpuidle: powernv: Don't bounce between low and very low thread priority cpuidle: cpuidle-cps: remove unused variable tools/power/x86/intel_pstate_tracer: Adjust directory ownership cpufreq: schedutil: Use policy-dependent transition delays cpufreq: schedutil: Reduce frequencies slower PM / devfreq: Move struct devfreq_governor to devfreq directory PM / Domains: Ignore domain-idle-states that are not compatible cpufreq: intel_pstate: Add support for Gemini Lake powernv-cpuidle: Validate DT property array size ...
2017-05-01Merge tag 'edac_for_4.12' of git://git.kernel.org/pub/scm/linux/kernel/git/bp/bpLinus Torvalds13-26/+3
Pull EDAC updates from Borislav Petkov: - an EDAC driver for Cavium ThunderX RAS IP (Sergey Temerkhanov) - removal of DRAM error reporting through PCI SERR NMI (Borislav Petkov) - misc small fixes (Jan Glauber, Thor Thayer) * tag 'edac_for_4.12' of git://git.kernel.org/pub/scm/linux/kernel/git/bp/bp: EDAC, ghes: Do not enable it by default EDAC: Rename report status accessors EDAC: Delete edac_stub.c EDAC: Update Kconfig help text EDAC: Remove EDAC_MM_EDAC EDAC: Issue tracepoint only when it is defined ACPI/extlog: Add EDAC dependency EDAC: Move edac_op_state to edac_mc.c EDAC: Remove edac_err_assert EDAC: Get rid of edac_handlers x86/nmi, EDAC: Get rid of DRAM error reporting thru PCI SERR NMI EDAC, highbank: Align Makefile directives EDAC, thunderx: Remove unused code EDAC, thunderx: Change LMC index calculation EDAC, altera: Fix peripheral warnings for Cyclone5 EDAC, thunderx: Fix L2C MCI interrupt disable EDAC, thunderx: Add Cavium ThunderX EDAC driver
2017-05-01avr32: remove support for AVR32 architectureHans-Christian Noren Egtvedt223-27029/+0
This patch drops support for AVR32 architecture from the Linux kernel. The AVR32 architecture is not keeping up with the development of the kernel, and since it shares so much of the drivers with Atmel ARM SoC, it is starting to hinder these drivers to develop swiftly. Also, all AVR32 AP7 SoC processors are end of lifed from Atmel (now Microchip). Finally, the GCC toolchain is stuck at version 4.2.x, and has not received any patches since the last release from Atmel; 4.2.4-atmel.1.1.3.avr32linux.1. When building kernel v4.10, this toolchain is no longer able to properly link the network stack. Haavard and I have came to the conclusion that we feel keeping AVR32 on life support offers more obstacles for Atmel ARMs, than it gives joy to AVR32 users. I also suspect there are very few AVR32 users left today, if anybody at all. Signed-off-by: Hans-Christian Noren Egtvedt <egtvedt@samfundet.no> Signed-off-by: Håvard Skinnemoen <hskinnemoen@gmail.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com> Acked-by: Andy Shevchenko <andy.shevchenko@gmail.com> Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2017-04-30Merge branch 'x86-urgent-for-linus' of ↵Linus Torvalds3-6/+27
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 fixes from Thomas Gleixner: "The final fixes for 4.11: - prevent a triple fault with function graph tracing triggered via suspend to ram - prevent optimizing for size when function graph tracing is enabled and the compiler does not support -mfentry - prevent mwaitx() being called with a zero timeout as mwaitx() might never return. Observed on the new Ryzen CPUs" * 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: Prevent timer value 0 for MWAITX x86/build: convert function graph '-Os' error to warning ftrace/x86: Fix triple fault with graph tracing and suspend-to-ram
2017-04-30Prevent timer value 0 for MWAITXJanakarajan Natarajan1-0/+7
Newer hardware has uncovered a bug in the software implementation of using MWAITX for the delay function. A value of 0 for the timer is meant to indicate that a timeout will not be used to exit MWAITX. On newer hardware this can result in MWAITX never returning, resulting in NMI soft lockup messages being printed. On older hardware, some of the other conditions under which MWAITX can exit masked this issue. The AMD APM does not currently document this and will be updated. Please refer to http://marc.info/?l=kvm&m=148950623231140 for information regarding NMI soft lockup messages on an AMD Ryzen 1800X. This has been root-caused as a 0 passed to MWAITX causing it to wait indefinitely. This change has the added benefit of avoiding the unnecessary setup of MONITORX/MWAITX when the delay value is zero. Signed-off-by: Janakarajan Natarajan <Janakarajan.Natarajan@amd.com> Link: http://lkml.kernel.org/r/1493156643-29366-1-git-send-email-Janakarajan.Natarajan@amd.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2017-04-28Merge branch 'pm-cpufreq'Rafael J. Wysocki1-5/+0
* pm-cpufreq: (37 commits) cpufreq: Add Tegra186 cpufreq driver cpufreq: imx6q: Fix error handling code cpufreq: imx6q: Set max suspend_freq to avoid changes during suspend cpufreq: imx6q: Fix handling EPROBE_DEFER from regulator cpufreq: schedutil: Use policy-dependent transition delays cpufreq: schedutil: Reduce frequencies slower cpufreq: intel_pstate: Add support for Gemini Lake cpufreq: intel_pstate: Eliminate intel_pstate_get_min_max() cpufreq: intel_pstate: Do not walk policy->cpus cpufreq: intel_pstate: Introduce pid_in_use() cpufreq: intel_pstate: Drop struct cpu_defaults cpufreq: intel_pstate: Move cpu_defaults definitions cpufreq: intel_pstate: Add update_util callback to pstate_funcs cpufreq: intel_pstate: Use different utilization update callbacks cpufreq: intel_pstate: Modify check in intel_pstate_update_status() cpufreq: intel_pstate: Drop driver_registered variable cpufreq: intel_pstate: Skip unnecessary PID resets on init cpufreq: intel_pstate: Set HWP sampling interval once cpufreq: intel_pstate: Clean up intel_pstate_busy_pid_reset() cpufreq: intel_pstate: Fold intel_pstate_reset_all_pid() into the caller ...
2017-04-28x86/KASLR: Fix kexec kernel boot crash when KASLR randomization failsBaoquan He1-2/+9
Dave found that a kdump kernel with KASLR enabled will reset to the BIOS immediately if physical randomization failed to find a new position for the kernel. A kernel with the 'nokaslr' option works in this case. The reason is that KASLR will install a new page table for the identity mapping, while it missed building it for the original kernel location if KASLR physical randomization fails. This only happens in the kexec/kdump kernel, because the identity mapping has been built for kexec/kdump in the 1st kernel for the whole memory by calling init_pgtable(). Here if physical randomizaiton fails, it won't build the identity mapping for the original area of the kernel but change to a new page table '_pgtable'. Then the kernel will triple fault immediately caused by no identity mappings. The normal kernel won't see this bug, because it comes here via startup_32() and CR3 will be set to _pgtable already. In startup_32() the identity mapping is built for the 0~4G area. In KASLR we just append to the existing area instead of entirely overwriting it for on-demand identity mapping building. So the identity mapping for the original area of kernel is still there. To fix it we just switch to the new identity mapping page table when physical KASLR succeeds. Otherwise we keep the old page table unchanged just like "nokaslr" does. Signed-off-by: Baoquan He <bhe@redhat.com> Signed-off-by: Dave Young <dyoung@redhat.com> Acked-by: Kees Cook <keescook@chromium.org> Cc: Borislav Petkov <bp@suse.de> Cc: Dave Jiang <dave.jiang@intel.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Garnier <thgarnie@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Yinghai Lu <yinghai@kernel.org> Link: http://lkml.kernel.org/r/1493278940-5885-1-git-send-email-bhe@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org>