BMC/Intel-BMC/linux.git/arch/x86/kernel/setup.c, branch dev-4.10

mm: remove x86-only restriction of movable_node

2016-12-13T02:55:07+00:00

In commit c5320926e370 ("mem-hotplug: introduce movable_node boot option"), the memblock allocation direction is changed to bottom-up and then back to top-down like this: 1. memblock_set_bottom_up(true), called by cmdline_parse_movable_node(). 2. memblock_set_bottom_up(false), called by x86's numa_init(). Even though (1) occurs in generic mm code, it is wrapped by #ifdef CONFIG_MOVABLE_NODE, which depends on X86_64. This means that when we extend CONFIG_MOVABLE_NODE to non-x86 arches, things will be unbalanced. (1) will happen for them, but (2) will not. This toggle was added in the first place because x86 has a delay between adding memblocks and marking them as hotpluggable. Since other arches do this marking either immediately or not at all, they do not require the bottom-up toggle. So, resolve things by moving (1) from cmdline_parse_movable_node() to x86's setup_arch(), immediately after the movable_node parameter has been parsed. Link: http://lkml.kernel.org/r/1479160961-25840-3-git-send-email-arbab@linux.vnet.ibm.com Signed-off-by: Reza Arbab Acked-by: Balbir Singh Cc: "Aneesh Kumar K.V" Cc: "H. Peter Anvin" Cc: Alistair Popple Cc: Aneesh Kumar K.V Cc: Benjamin Herrenschmidt Cc: Bharata B Rao Cc: Frank Rowand Cc: Ingo Molnar Cc: Michael Ellerman Cc: Nathan Fontenot Cc: Paul Mackerras Cc: Rob Herring Cc: Stewart Smith Cc: Thomas Gleixner Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

x86/smpboot: Init apic mapping before usage

2016-10-29T12:00:46+00:00

The recent changes, which forced the registration of the boot cpu on UP systems, which do not have ACPI tables, have been fixed for systems w/o local APIC, but left a wreckage for systems which have neither ACPI nor mptables, but the CPU has an APIC, e.g. virtualbox. The boot process crashes in prefill_possible_map() as it wants to register the boot cpu, which needs to access the local apic, but the local APIC is not yet mapped. There is no reason why init_apic_mapping() can't be invoked before prefill_possible_map(). So instead of playing another silly early mapping game, as the ACPI/mptables code does, we just move init_apic_mapping() before the call to prefill_possible_map(). In hindsight, I should have noticed that combination earlier. Sorry for the churn (also in stable)! Fixes: ff8560512b8d ("x86/boot/smp: Don't try to poke disabled/non-existent APIC") Reported-and-debugged-by: Michal Necasek Reported-and-tested-by: Wolfgang Bauer Cc: prarit@redhat.com Cc: ville.syrjala@linux.intel.com Cc: michael.thayer@oracle.com Cc: knut.osmundsen@oracle.com Cc: frank.mehnert@oracle.com Cc: Borislav Petkov Cc: stable@vger.kernel.org Link: http://lkml.kernel.org/r/alpine.DEB.2.20.1610282114380.5053@nanos Signed-off-by: Thomas Gleixner

Merge branch 'x86-boot-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2016-10-03T23:46:53+00:00

Pull x86 boot updates from Ingo Molnar: "The changes in this cycle were: - Save e820 table RAM footprint on larger kernel configurations. (Denys Vlasenko) - pmem related fixes (Dan Williams) - theoretical e820 boundary condition fix (Wei Yang)" * 'x86-boot-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/boot: Fix kdump, cleanup aborted E820_PRAM max_pfn manipulation x86/e820: Use much less memory for e820/e820_saved, save up to 120k x86/e820: Prepare e280 code for switch to dynamic storage x86/e820: Mark some static functions __init x86/e820: Fix very large 'size' handling boundary condition

Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2016-10-03T23:13:28+00:00

Pull low-level x86 updates from Ingo Molnar: "In this cycle this topic tree has become one of those 'super topics' that accumulated a lot of changes: - Add CONFIG_VMAP_STACK=y support to the core kernel and enable it on x86 - preceded by an array of changes. v4.8 saw preparatory changes in this area already - this is the rest of the work. Includes the thread stack caching performance optimization. (Andy Lutomirski) - switch_to() cleanups and all around enhancements. (Brian Gerst) - A large number of dumpstack infrastructure enhancements and an unwinder abstraction. The secret long term plan is safe(r) live patching plus maybe another attempt at debuginfo based unwinding - but all these current bits are standalone enhancements in a frame pointer based debug environment as well. (Josh Poimboeuf) - More __ro_after_init and const annotations. (Kees Cook) - Enable KASLR for the vmemmap memory region. (Thomas Garnier)" [ The virtually mapped stack changes are pretty fundamental, and not x86-specific per se, even if they are only used on x86 right now. ] * 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (70 commits) x86/asm: Get rid of __read_cr4_safe() thread_info: Use unsigned long for flags x86/alternatives: Add stack frame dependency to alternative_call_2() x86/dumpstack: Fix show_stack() task pointer regression x86/dumpstack: Remove dump_trace() and related callbacks x86/dumpstack: Convert show_trace_log_lvl() to use the new unwinder oprofile/x86: Convert x86_backtrace() to use the new unwinder x86/stacktrace: Convert save_stack_trace_*() to use the new unwinder perf/x86: Convert perf_callchain_kernel() to use the new unwinder x86/unwind: Add new unwind interface and implementations x86/dumpstack: Remove NULL task pointer convention fork: Optimize task creation by caching two thread stacks per CPU if CONFIG_VMAP_STACK=y sched/core: Free the stack early if CONFIG_THREAD_INFO_IN_TASK lib/syscall: Pin the task stack in collect_syscall() x86/process: Pin the target stack in get_wchan() x86/dumpstack: Pin the target stack when dumping it kthread: Pin the stack via try_get_task_stack()/put_task_stack() in to_live_kthread() function sched/core: Add try_get_task_stack() and put_task_stack() x86/entry/64: Fix a minor comment rebase error iommu/amd: Don't put completion-wait semaphore on stack ...

Merge branch 'x86-apic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2016-10-03T22:36:06+00:00

Pull x86 apic updates from Ingo Molnar: "The main changes are: - Persistent CPU/node numbering across CPU hotplug/unplug events. This is a pretty involved series of changes that first fetches all the information during bootup and then uses it for the various hotplug/unplug methods. (Gu Zheng, Dou Liyang) - IO-APIC hot-add/remove fixes and enhancements. (Rui Wang) - ... various fixes, cleanups and enhancements" * 'x86-apic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (22 commits) x86/apic: Fix silent & fatal merge conflict in __generic_processor_info() acpi: Fix broken error check in map_processor() acpi: Validate processor id when mapping the processor acpi: Provide mechanism to validate processors in the ACPI tables x86/acpi: Set persistent cpuid <-> nodeid mapping when booting x86/acpi: Enable MADT APIs to return disabled apicids x86/acpi: Introduce persistent storage for cpuid <-> apicid mapping x86/acpi: Enable acpi to register all possible cpus at boot time x86/numa: Online memory-less nodes at boot time x86/apic: Get rid of apic_version[] array x86/apic: Order irq_enter/exit() calls correctly vs. ack_APIC_irq() x86/ioapic: Ignore root bridges without a companion ACPI device x86/apic: Update comment about disabling processor focus x86/smpboot: Check APIC ID before setting up default routing x86/ioapic: Fix IOAPIC failing to request resource x86/ioapic: Fix lost IOAPIC resource after hot-removal and hotadd x86/ioapic: Fix setup_res() failing to get resource x86/ioapic: Support hot-removal of IOAPICs present during boot x86/ioapic: Change prototype of acpi_ioapic_add() x86/apic, ACPI: Fix incorrect assignment when handling apic/x2apic entries ...

Merge branch 'efi-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2016-10-03T18:33:18+00:00

Pull EFI updates from Ingo Molnar: "Main changes in this cycle were: - Refactor the EFI memory map code into architecture neutral files and allow drivers to permanently reserve EFI boot services regions on x86, as well as ARM/arm64. (Matt Fleming) - Add ARM support for the EFI ESRT driver. (Ard Biesheuvel) - Make the EFI runtime services and efivar API interruptible by swapping spinlocks for semaphores. (Sylvain Chouleur) - Provide the EFI identity mapping for kexec which allows kexec to work on SGI/UV platforms with requiring the "noefi" kernel command line parameter. (Alex Thorlton) - Add debugfs node to dump EFI page tables on arm64. (Ard Biesheuvel) - Merge the EFI test driver being carried out of tree until now in the FWTS project. (Ivan Hu) - Expand the list of flags for classifying EFI regions as "RAM" on arm64 so we align with the UEFI spec. (Ard Biesheuvel) - Optimise out the EFI mixed mode if it's unsupported (CONFIG_X86_32) or disabled (CONFIG_EFI_MIXED=n) and switch the early EFI boot services function table for direct calls, alleviating us from having to maintain the custom function table. (Lukas Wunner) - Miscellaneous cleanups and fixes" * 'efi-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (30 commits) x86/efi: Round EFI memmap reservations to EFI_PAGE_SIZE x86/efi: Allow invocation of arbitrary boot services x86/efi: Optimize away setup_gop32/64 if unused x86/efi: Use kmalloc_array() in efi_call_phys_prolog() efi/arm64: Treat regions with WT/WC set but WB cleared as memory efi: Add efi_test driver for exporting UEFI runtime service interfaces x86/efi: Defer efi_esrt_init until after memblock_x86_fill efi/arm64: Add debugfs node to dump UEFI runtime page tables x86/efi: Remove unused find_bits() function fs/efivarfs: Fix double kfree() in error path x86/efi: Map in physical addresses in efi_map_region_fixed lib/ucs2_string: Speed up ucs2_utf8size() firmware-gsmi: Delete an unnecessary check before the function call "dma_pool_destroy" x86/efi: Initialize status to ensure garbage is not returned on small size efi: Replace runtime services spinlock with semaphore efi: Don't use spinlocks for efi vars efi: Use a file local lock for efivars efi/arm*: esrt: Add missing call to efi_esrt_init() efi/esrt: Use memremap not ioremap to access ESRT table in memory x86/efi-bgrt: Use efi_mem_reserve() to avoid copying image data ...

x86/asm: Get rid of __read_cr4_safe()

2016-09-30T10:40:12+00:00

We use __read_cr4() vs __read_cr4_safe() inconsistently. On CR4-less CPUs, all CR4 bits are effectively clear, so we can make the code simpler and more robust by making __read_cr4() always fix up faults on 32-bit kernels. This may fix some bugs on old 486-like CPUs, but I don't have any easy way to test that. Signed-off-by: Andy Lutomirski Cc: Brian Gerst Cc: Borislav Petkov Cc: david@saggiorato.net Link: http://lkml.kernel.org/r/ea647033d357d9ce2ad2bbde5a631045f5052fb6.1475178370.git.luto@kernel.org Signed-off-by: Thomas Gleixner

Merge branch 'x86/urgent' into x86/asm

2016-09-30T10:38:28+00:00

Get the cr4 fixes so we can apply the final cleanup

x86/boot: Fix another __read_cr4() case on 486

2016-09-30T10:37:40+00:00

The condition for reading CR4 was wrong: there are some CPUs with CPUID but not CR4. Rather than trying to make the condition exact, use __read_cr4_safe(). Fixes: 18bc7bd523e0 ("x86/boot: Synchronize trampoline_cr4_features and mmu_cr4_features directly") Reported-by: david@saggiorato.net Signed-off-by: Andy Lutomirski Reviewed-by: Borislav Petkov Cc: Brian Gerst Link: http://lkml.kernel.org/r/8c453a61c4f44ab6ff43c29780ba04835234d2e5.1475178369.git.luto@kernel.org Signed-off-by: Thomas Gleixner

x86/e820: Prepare e280 code for switch to dynamic storage

2016-09-21T13:02:12+00:00

This patch turns e820 and e820_saved into pointers to e820 tables, of the same size as before. Signed-off-by: Denys Vlasenko Acked-by: Thomas Gleixner Cc: Andy Lutomirski Cc: Andy Lutomirski Cc: Borislav Petkov Cc: Brian Gerst Cc: H. Peter Anvin Cc: Josh Poimboeuf Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Yinghai Lu Cc: linux-kernel@vger.kernel.org Link: http://lkml.kernel.org/r/20160917213927.1787-2-dvlasenk@redhat.com Signed-off-by: Ingo Molnar