From: Linus Torvalds Date: Mon, 8 Jul 2019 16:54:55 +0000 (-0700) Subject: Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64... X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=dfd437a257924484b144ee750e60affc95562c6d;p=openwrt%2Fstaging%2Fblogic.git Merge tag 'arm64-upstream' of git://git./linux/kernel/git/arm64/linux Pull arm64 updates from Catalin Marinas: - arm64 support for syscall emulation via PTRACE_SYSEMU{,_SINGLESTEP} - Wire up VM_FLUSH_RESET_PERMS for arm64, allowing the core code to manage the permissions of executable vmalloc regions more strictly - Slight performance improvement by keeping softirqs enabled while touching the FPSIMD/SVE state (kernel_neon_begin/end) - Expose a couple of ARMv8.5 features to user (HWCAP): CondM (new XAFLAG and AXFLAG instructions for floating point comparison flags manipulation) and FRINT (rounding floating point numbers to integers) - Re-instate ARM64_PSEUDO_NMI support which was previously marked as BROKEN due to some bugs (now fixed) - Improve parking of stopped CPUs and implement an arm64-specific panic_smp_self_stop() to avoid warning on not being able to stop secondary CPUs during panic - perf: enable the ARM Statistical Profiling Extensions (SPE) on ACPI platforms - perf: DDR performance monitor support for iMX8QXP - cache_line_size() can now be set from DT or ACPI/PPTT if provided to cope with a system cache info not exposed via the CPUID registers - Avoid warning on hardware cache line size greater than ARCH_DMA_MINALIGN if the system is fully coherent - arm64 do_page_fault() and hugetlb cleanups - Refactor set_pte_at() to avoid redundant READ_ONCE(*ptep) - Ignore ACPI 5.1 FADTs reported as 5.0 (infer from the 'arm_boot_flags' introduced in 5.1) - CONFIG_RANDOMIZE_BASE now enabled in defconfig - Allow the selection of ARM64_MODULE_PLTS, currently only done via RANDOMIZE_BASE (and an erratum workaround), allowing modules to spill over into the vmalloc area - Make ZONE_DMA32 configurable * tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (54 commits) perf: arm_spe: Enable ACPI/Platform automatic module loading arm_pmu: acpi: spe: Add initial MADT/SPE probing ACPI/PPTT: Add function to return ACPI 6.3 Identical tokens ACPI/PPTT: Modify node flag detection to find last IDENTICAL x86/entry: Simplify _TIF_SYSCALL_EMU handling arm64: rename dump_instr as dump_kernel_instr arm64/mm: Drop [PTE|PMD]_TYPE_FAULT arm64: Implement panic_smp_self_stop() arm64: Improve parking of stopped CPUs arm64: Expose FRINT capabilities to userspace arm64: Expose ARMv8.5 CondM capability to userspace arm64: defconfig: enable CONFIG_RANDOMIZE_BASE arm64: ARM64_MODULES_PLTS must depend on MODULES arm64: bpf: do not allocate executable memory arm64/kprobes: set VM_FLUSH_RESET_PERMS on kprobe instruction pages arm64/mm: wire up CONFIG_ARCH_HAS_SET_DIRECT_MAP arm64: module: create module allocations without exec permissions arm64: Allow user selection of ARM64_MODULE_PLTS acpi/arm64: ignore 5.1 FADTs that are reported as 5.0 arm64: Allow selecting Pseudo-NMI again ... --- dfd437a257924484b144ee750e60affc95562c6d diff --cc arch/arm64/include/asm/thread_info.h index 2372e97db29c,c285d1ce7186..180b34ec5965 --- a/arch/arm64/include/asm/thread_info.h +++ b/arch/arm64/include/asm/thread_info.h @@@ -64,7 -75,8 +64,8 @@@ void arch_release_task_struct(struct ta * TIF_SYSCALL_TRACE - syscall trace active * TIF_SYSCALL_TRACEPOINT - syscall tracepoint for ftrace * TIF_SYSCALL_AUDIT - syscall auditing + * TIF_SECCOMP - syscall secure computing + * TIF_SYSCALL_EMU - syscall emulation active - * TIF_SECOMP - syscall secure computing * TIF_SIGPENDING - signal pending * TIF_NEED_RESCHED - rescheduling necessary * TIF_NOTIFY_RESUME - callback before returning to user diff --cc arch/arm64/kernel/module.c index 71530e080ecc,5b5936b7868c..46e643e30708 --- a/arch/arm64/kernel/module.c +++ b/arch/arm64/kernel/module.c @@@ -29,12 -39,9 +29,12 @@@ void *module_alloc(unsigned long size if (IS_ENABLED(CONFIG_ARM64_MODULE_PLTS)) gfp_mask |= __GFP_NOWARN; + if (IS_ENABLED(CONFIG_KASAN)) + /* don't exceed the static module region - see below */ + module_alloc_end = MODULES_END; + p = __vmalloc_node_range(size, MODULE_ALIGN, module_alloc_base, - module_alloc_end, gfp_mask, PAGE_KERNEL_EXEC, 0, - module_alloc_base + MODULES_VSIZE, - gfp_mask, PAGE_KERNEL, 0, ++ module_alloc_end, gfp_mask, PAGE_KERNEL, 0, NUMA_NO_NODE, __builtin_return_address(0)); if (!p && IS_ENABLED(CONFIG_ARM64_MODULE_PLTS) && diff --cc mm/vmalloc.c index 0f76cca32a1c,6bd7b515995c..030a544e6602 --- a/mm/vmalloc.c +++ b/mm/vmalloc.c @@@ -2123,22 -2123,11 +2123,11 @@@ static inline void set_area_direct_map( /* Handle removing and resetting vm mappings related to the vm_struct. */ static void vm_remove_mappings(struct vm_struct *area, int deallocate_pages) { - unsigned long addr = (unsigned long)area->addr; unsigned long start = ULONG_MAX, end = 0; int flush_reset = area->flags & VM_FLUSH_RESET_PERMS; + int flush_dmap = 0; int i; - /* - * The below block can be removed when all architectures that have - * direct map permissions also have set_direct_map_() implementations. - * This is concerned with resetting the direct map any an vm alias with - * execute permissions, without leaving a RW+X window. - */ - if (flush_reset && !IS_ENABLED(CONFIG_ARCH_HAS_SET_DIRECT_MAP)) { - set_memory_nx((unsigned long)area->addr, area->nr_pages); - set_memory_rw((unsigned long)area->addr, area->nr_pages); - } - remove_vm_area(area->addr); /* If this is not VM_FLUSH_RESET_PERMS memory, no need for the below. */