Messages in this thread | | | From | "Bae, Chang Seok" <> | Subject | Re: [PATCH 00/15] x86: Enable FSGSBASE instructions | Date | Wed, 21 Mar 2018 15:15:35 +0000 |
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> Summary please.
These deltas I found as comparing with your old codes [4] * Paranoid entry changes to avoid vulnerability * Ptrace changes to support the legacy behavior (conditionally) * Dropped [1] to be aligned with what is concluded in [3] * Dropped [2] since save_fsgs() doesn’t copy base when index is zero; now open code with FSGSBASE instructions. * Re-wrote assembly macros and dropped (redundant) SWAPGS intrinsic * Revised helper functions -- dropped unused helpers and factor out write_task_fs/gsbase * Introducing all of helper functions at the beginning of patch series * Factor out load_fsgs() * One of the test cases will be included later (as published 15 patches already)
[1] Refresh FS and GS when modify_ldt changes an entry https://git.kernel.org/pub/scm/linux/kernel/git/luto/linux.git/commit/?h=x86/fsgsbase&id=fbe2c2a0ba5b879f8229ca7dfc0d434dbe31a805 [2] When copying a thread, safe FS and GS for real https://git.kernel.org/pub/scm/linux/kernel/git/luto/linux.git/commit/?h=x86/fsgsbase&id=e51eceeefbd587b514ca357b745b46e8e2746d34 [3] FSGSBASE ABI discussion https://marc.info/?l=linux-kernel&m=150212735223392&w=2 [4] https://git.kernel.org/pub/scm/linux/kernel/git/luto/linux.git/log/?h=x86/fsgsbase
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