| From: |
| Konstantin Khlebnikov <koct9i@gmail.com> |
| To: |
| linux-mm@kvack.org, Andrew Morton <akpm@linux-foundation.org>, Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> |
| Subject: |
| [PATCHSET v3 0/4] pagemap: make useable for non-privilege users |
| Date: |
| Tue, 09 Jun 2015 23:00:13 +0300 |
| Message-ID: |
| <20150609195333.21971.58194.stgit@zurg> |
| Cc: |
| linux-api@vger.kernel.org, Mark Williamson <mwilliamson@undo-software.com>, linux-kernel@vger.kernel.org, "Kirill A. Shutemov" <kirill@shutemov.name> |
| Archive‑link: | |
Article |
This patchset makes pagemap useable again in the safe way. It adds bit
'map-exlusive' which is set if page is mapped only here and restores
access for non-privileged users but hides pfn from them.
Last patch removes page-shift bits and completes migration to the new
pagemap format: flags soft-dirty and mmap-exlusive are available only
in the new format.
v3: check permissions in ->open
---
Konstantin Khlebnikov (4):
pagemap: check permissions and capabilities at open time
pagemap: add mmap-exclusive bit for marking pages mapped only here
pagemap: hide physical addresses from non-privileged users
pagemap: switch to the new format and do some cleanup
Documentation/vm/pagemap.txt | 3 -
fs/proc/task_mmu.c | 219 +++++++++++++++++++-----------------------
tools/vm/page-types.c | 35 +++----
3 files changed, 118 insertions(+), 139 deletions(-)
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