1. 21 Oct, 2015 5 commits
  2. 12 Oct, 2015 1 commit
    • Andrey Ryabinin's avatar
      arm64: add KASAN support · 39d114dd
      Andrey Ryabinin authored
      This patch adds arch specific code for kernel address sanitizer
      (see Documentation/kasan.txt).
      1/8 of kernel addresses reserved for shadow memory. There was no
      big enough hole for this, so virtual addresses for shadow were
      stolen from vmalloc area.
      At early boot stage the whole shadow region populated with just
      one physical page (kasan_zero_page). Later, this page reused
      as readonly zero shadow for some memory that KASan currently
      don't track (vmalloc).
      After mapping the physical memory, pages for shadow memory are
      allocated and mapped.
      Functions like memset/memmove/memcpy do a lot of memory accesses.
      If bad pointer passed to one of these function it is important
      to catch this. Compiler's instrumentation cannot do this since
      these functions are written in assembly.
      KASan replaces memory functions with manually instrumented variants.
      Original functions declared as weak symbols so strong definitions
      in mm/kasan/kasan.c could replace them. Original functions have aliases
      with '__' prefix in name, so we could call non-instrumented variant
      if needed.
      Some files built without kasan instrumentation (e.g. mm/slub.c).
      Original mem* function replaced (via #define) with prefixed variants
      to disable memory access checks for such files.
      Signed-off-by: default avatarAndrey Ryabinin <ryabinin.a.a@gmail.com>
      Tested-by: default avatarLinus Walleij <linus.walleij@linaro.org>
      Reviewed-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
      Signed-off-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
  3. 08 Sep, 2015 1 commit
  4. 03 Aug, 2015 1 commit
  5. 29 Jul, 2015 1 commit
  6. 27 Jul, 2015 8 commits
  7. 20 Jul, 2015 1 commit
  8. 02 Jun, 2015 1 commit
  9. 28 May, 2015 1 commit
  10. 19 May, 2015 1 commit
  11. 26 Mar, 2015 2 commits
  12. 25 Mar, 2015 4 commits
  13. 19 Mar, 2015 3 commits
  14. 17 Mar, 2015 2 commits
  15. 23 Jan, 2015 1 commit
  16. 22 Jan, 2015 1 commit
  17. 16 Jan, 2015 1 commit
    • Mark Rutland's avatar
      arm64: respect mem= for EFI · 6083fe74
      Mark Rutland authored
      When booting with EFI, we acquire the EFI memory map after parsing the
      early params. This unfortuantely renders the option useless as we call
      memblock_enforce_memory_limit (which uses memblock_remove_range behind
      the scenes) before we've added any memblocks. We end up removing
      nothing, then adding all of memory later when efi_init calls
      Instead, we can log the limit and apply this later when we do the rest
      of the memblock work in memblock_init, which should work regardless of
      the presence of EFI. At the same time we may as well move the early
      parameter into arm64's mm/init.c, close to arm64_memblock_init.
      Any memory which must be mapped (e.g. for use by EFI runtime services)
      must be mapped explicitly reather than relying on the linear mapping,
      which may be truncated as a result of a mem= option passed on the kernel
      command line.
      Signed-off-by: default avatarMark Rutland <mark.rutland@arm.com>
      Acked-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
      Acked-by: default avatarArd Biesheuvel <ard.biesheuvel@linaro.org>
      Tested-by: default avatarArd Biesheuvel <ard.biesheuvel@linaro.org>
      Cc: Leif Lindholm <leif.lindholm@linaro.org>
      Cc: Will Deacon <will.deacon@arm.com>
      Signed-off-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
  18. 12 Jan, 2015 2 commits
  19. 08 Jan, 2015 1 commit
    • Ard Biesheuvel's avatar
      arm64/efi: add missing call to early_ioremap_reset() · 0e63ea48
      Ard Biesheuvel authored
      The early ioremap support introduced by patch bf4b558e
      ("arm64: add early_ioremap support") failed to add a call to
      early_ioremap_reset() at an appropriate time. Without this call,
      invocations of early_ioremap etc. that are done too late will go
      unnoticed and may cause corruption.
      This is exactly what happened when the first user of this feature
      was added in patch f84d0275 ("arm64: add EFI runtime services").
      The early mapping of the EFI memory map is unmapped during an early
      initcall, at which time the early ioremap support is long gone.
      Fix by adding the missing call to early_ioremap_reset() to
      setup_arch(), and move the offending early_memunmap() to right after
      the point where the early mapping of the EFI memory map is last used.
      Fixes: f84d0275
       ("arm64: add EFI runtime services")
      Cc: <stable@vger.kernel.org>
      Signed-off-by: default avatarLeif Lindholm <leif.lindholm@linaro.org>
      Signed-off-by: default avatarArd Biesheuvel <ard.biesheuvel@linaro.org>
      Signed-off-by: default avatarWill Deacon <will.deacon@arm.com>
  20. 04 Dec, 2014 1 commit
    • Fabio Estevam's avatar
      arm64: Provide a namespace to NCAPS · 06f9eb88
      Fabio Estevam authored
      Building arm64.allmodconfig leads to the following warning:
      usb/gadget/function/f_ncm.c:203:0: warning: "NCAPS" redefined
      In file included from /home/build/work/batch/arch/arm64/include/asm/io.h:32:0,
                       from /home/build/work/batch/include/linux/clocksource.h:19,
                       from /home/build/work/batch/include/clocksource/arm_arch_timer.h:19,
                       from /home/build/work/batch/arch/arm64/include/asm/arch_timer.h:27,
                       from /home/build/work/batch/arch/arm64/include/asm/timex.h:19,
                       from /home/build/work/batch/include/linux/timex.h:65,
                       from /home/build/work/batch/include/linux/sched.h:19,
                       from /home/build/work/batch/arch/arm64/include/asm/compat.h:25,
                       from /home/build/work/batch/arch/arm64/include/asm/stat.h:23,
                       from /home/build/work/batch/include/linux/stat.h:5,
                       from /home/build/work/batch/include/linux/module.h:10,
                       from /home/build/work/batch/drivers/usb/gadget/function/f_ncm.c:19:
      arch/arm64/include/asm/cpufeature.h:27:0: note: this is the location of the previous definition
       #define NCAPS     2
      So add a ARM64 prefix to avoid such problem.
      Reported-by: default avatarOlof's autobuilder <build@lixom.net>
      Signed-off-by: default avatarFabio Estevam <fabio.estevam@freescale.com>
      Signed-off-by: default avatarWill Deacon <will.deacon@arm.com>
  21. 25 Nov, 2014 1 commit