Date: Wed, 9 Aug 2017 14:07:45 -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 v5 00/10] Add support for eXclusive Page Frame Ownership Hi all, Here's a v5 of the XPFO set. Changes from v4 are: * huge pages support actually works now on x86 * arm64 support, which boots on several different arm64 boards * tests for hugepages support as well via LKDTM (thanks Kees for suggesting how to make this work) Patch 2 contains some potentially controversial stuff, exposing the cpa_lock and lifting some other static functions out; there is probably a better way to do this, thoughts welcome. Still to do are: * get it to work with non-64k pages on ARM * get rid of the BUG()s, in favor or WARN or similar * other things people come up with in this review Please have a look. Thoughts welcome! Previously: http://www.openwall.com/lists/kernel-hardening/2017/06/07/24 Tycho Juerg Haefliger (8): mm, x86: Add support for eXclusive Page Frame Ownership (XPFO) swiotlb: Map the buffer if it was unmapped by XPFO arm64: Add __flush_tlb_one() arm64/mm: Add support for XPFO arm64/mm: Disable section mappings if XPFO is enabled arm64/mm: Don't flush the data cache if the page is unmapped by XPFO arm64/mm: Add support for XPFO to swiotlb lkdtm: Add test for XPFO Tycho Andersen (2): mm: add MAP_HUGETLB support to vm_mmap 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/include/asm/tlbflush.h | 8 + arch/arm64/mm/Makefile | 2 + arch/arm64/mm/dma-mapping.c | 32 ++-- arch/arm64/mm/flush.c | 5 +- arch/arm64/mm/mmu.c | 14 +- arch/arm64/mm/xpfo.c | 160 +++++++++++++++++ arch/x86/Kconfig | 1 + arch/x86/include/asm/pgtable.h | 23 +++ arch/x86/mm/Makefile | 1 + arch/x86/mm/pageattr.c | 24 +-- arch/x86/mm/xpfo.c | 153 +++++++++++++++++ drivers/misc/Makefile | 1 + drivers/misc/lkdtm.h | 4 + drivers/misc/lkdtm_core.c | 4 + drivers/misc/lkdtm_xpfo.c | 62 +++++++ include/linux/highmem.h | 15 +- include/linux/mm.h | 2 + include/linux/xpfo.h | 47 +++++ 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 | 217 ++++++++++++++++++++++++ security/Kconfig | 19 +++ 29 files changed, 810 insertions(+), 59 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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