Hi x86 maintainers, It appeared that my attempt to send this earlier this week failed to reach at least some of the intended recipients. I updated a few of the patch descriptions and am resending.
There are 4 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. Support 32-bit binaries to run on 64-bit kernels I've hesitated sending this in the past few weeks as the FPU code had a lot of churn and affected our ability to test on current kernels. It seems to have settled down and appears more stable now. These are available against 4.0-rc4 in git as well: git://git.kernel.org/pub/scm/linux/kernel/git/daveh/x86-mpx.git mpx-v17 Dave Hansen (17): x86, fpu: wrap get_xsave_addr() to make it safer x86, mpx: use new tsk_get_xsave_addr() x86, mpx: trace #BR exceptions x86, mpx: trace entry to bounds exception paths x86, mpx: trace when MPX is zapping pages x86, mpx: trace attempts to find bounds tables x86, mpx: trace allocation of new bounds tables x86, mpx: boot-time disable x86: make is_64bit_mm() widely available x86: make __VIRTUAL_MASK safe to use on 32 bit x86, mpx: we do not allocate the bounds directory x86, mpx: remove redundant MPX_BNDCFG_ADDR_MASK x86, mpx: Add temporary variable to reduce masking x86, mpx: new directory entry to addr helper x86, mpx: do 32-bit-only cmpxchg for 32-bit apps x86, mpx: support 32-bit binaries on 64-bit kernel x86, mpx: allow mixed binaries again Documentation/kernel-parameters.txt | 4 + arch/x86/include/asm/mmu_context.h | 13 ++ arch/x86/include/asm/mpx.h | 74 +++++----- arch/x86/include/asm/page_types.h | 8 ++ arch/x86/include/asm/trace/mpx.h | 133 ++++++++++++++++++ arch/x86/include/asm/xsave.h | 1 + arch/x86/kernel/cpu/common.c | 16 +++ arch/x86/kernel/traps.c | 12 +- arch/x86/kernel/uprobes.c | 10 +- arch/x86/kernel/xsave.c | 32 +++++ arch/x86/mm/mpx.c | 270 +++++++++++++++++++++++++++++------- 11 files changed, 469 insertions(+), 104 deletions(-) create mode 100644 arch/x86/include/asm/trace/mpx.h -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
