Messages in this thread | | | Subject | [PATCH 00/19] x86, mpx updates for 4.2 (take 6) | From | Dave Hansen <> | Date | Fri, 08 May 2015 11:59:48 -0700 |
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Changes from take 5 / v20:
* Fix get_xsave_addr() to consult xstate_bv in anticipation of fixes to xsave code. * Bug fix for when an VMA being unmapped has neighbors which are bounds tables. * Rewrite unmapping code. I didn't do this lightly. It was not originally my own code, and I resisted changing it because it worked. But, I started bug chasing and decided it was unmaintainable. The rewrite ended up removing about 20% of the unmapping code and made it much simpler.
Changes from take 4 / v19:
* Do not pass a task_struct around when we are really just going to operate on current
Changes from take 3 / v18 (all minor):
* use DECLARE_EVENT_CLASS()/DEFINE_EVENT() for the ranged tracepoints to save 10 lines of code.
Changes from take 2 / v17 (all minor):
* fix a couple of whitespace borkages caught by checkpatch, and a spelling error or two. * replace printk with pr_info() for boot disable * change trace print format for address intervals * fix up variable name in tsk_get_xsave_addr() comment * remove tsk_get_xsave_field() GPL export * fix up Qiaowei's From:
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Hi x86 maintainers,
There are a few basic things going on here: 1. Make FPU/xsave code preempt safe and work properly 2. Add trace points to make kernel and app debugging easier 3. Add a boot-time disable for mpx 4. Rewrite the unmapping code. 5. Support 32-bit binaries to run on 64-bit kernels
This sees breakage unless either booted with 'noxsaves' or if it has Fenghua's set from here applied:
http://lkml.kernel.org/r/1429678319-61356-1-git-send-email-fenghua.yu@intel.com
This set is also available against 4.1-rc2 in git:
git://git.kernel.org/pub/scm/linux/kernel/git/daveh/x86-mpx.git mpx-v21
Documentation/kernel-parameters.txt | 4 arch/x86/include/asm/mmu_context.h | 13 arch/x86/include/asm/mpx.h | 76 ++-- arch/x86/include/asm/processor.h | 12 arch/x86/include/asm/xsave.h | 1 arch/x86/kernel/cpu/common.c | 16 arch/x86/kernel/traps.c | 18 - arch/x86/kernel/uprobes.c | 10 arch/x86/kernel/xsave.c | 73 +++- arch/x86/mm/mpx.c | 634 +++++++++++++++++++++--------------- kernel/sys.c | 8 11 files changed, 543 insertions(+), 322 deletions(-)
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