Date: Thu, 7 Sep 2017 11:35:58 -0600 From: Tycho Andersen <tycho@...ker.com> To: linux-kernel@...r.kernel.org Cc: linux-mm@...ck.org, kernel-hardening@...ts.openwall.com, Marco Benatto <marco.antonio.780@...il.com>, Juerg Haefliger <juerg.haefliger@...onical.com>, Tycho Andersen <tycho@...ker.com> Subject: [PATCH v6 00/11] Add support for eXclusive Page Frame Ownership Hi all, Here is v6 of the XPFO set; see v5 discussion here: https://lkml.org/lkml/2017/8/9/803 Changelogs are in the individual patch notes, but the highlights are: * add primitives for ensuring memory areas are mapped (although these are quite ugly, using stack allocation; I'm open to better suggestions) * instead of not flushing caches, re-map pages using the above * TLB flushing is much more correct (i.e. we're always flushing everything everywhere). I suspect we may be able to back this off in some cases, but I'm still trying to collect performance numbers to prove this is worth doing. I have no TODOs left for this set myself, other than fixing whatever review feedback people have. Thoughts and testing welcome! Cheers, Tycho Juerg Haefliger (6): mm, x86: Add support for eXclusive Page Frame Ownership (XPFO) swiotlb: Map the buffer if it was unmapped by XPFO arm64/mm: Add support for XPFO arm64/mm, xpfo: temporarily map dcache regions arm64/mm: Add support for XPFO to swiotlb lkdtm: Add test for XPFO Tycho Andersen (5): mm: add MAP_HUGETLB support to vm_mmap x86: always set IF before oopsing from page fault xpfo: add primitives for mapping underlying memory arm64/mm: disable section/contiguous mappings if XPFO is enabled mm: add a user_virt_to_phys symbol Documentation/admin-guide/kernel-parameters.txt | 2 + arch/arm64/Kconfig | 1 + arch/arm64/include/asm/cacheflush.h | 11 + arch/arm64/mm/Makefile | 2 + arch/arm64/mm/dma-mapping.c | 32 +-- arch/arm64/mm/flush.c | 7 + arch/arm64/mm/mmu.c | 2 +- arch/arm64/mm/xpfo.c | 127 +++++++++++ arch/x86/Kconfig | 1 + arch/x86/include/asm/pgtable.h | 25 +++ arch/x86/mm/Makefile | 1 + arch/x86/mm/fault.c | 6 + arch/x86/mm/pageattr.c | 22 +- arch/x86/mm/xpfo.c | 171 +++++++++++++++ drivers/misc/Makefile | 1 + drivers/misc/lkdtm.h | 5 + drivers/misc/lkdtm_core.c | 3 + drivers/misc/lkdtm_xpfo.c | 194 +++++++++++++++++ include/linux/highmem.h | 15 +- include/linux/mm.h | 2 + include/linux/xpfo.h | 79 +++++++ lib/swiotlb.c | 3 +- mm/Makefile | 1 + mm/mmap.c | 19 +- mm/page_alloc.c | 2 + mm/page_ext.c | 4 + mm/util.c | 32 +++ mm/xpfo.c | 273 ++++++++++++++++++++++++ security/Kconfig | 19 ++ 29 files changed, 1005 insertions(+), 57 deletions(-) create mode 100644 arch/arm64/mm/xpfo.c create mode 100644 arch/x86/mm/xpfo.c create mode 100644 drivers/misc/lkdtm_xpfo.c create mode 100644 include/linux/xpfo.h create mode 100644 mm/xpfo.c -- 2.11.0
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