From: Andy Lutomirski <luto@kernel.org>
To: x86@kernel.org
Cc: LKML <linux-kernel@vger.kernel.org>,
Dave Hansen <dave.hansen@linux.intel.com>,
Alexei Starovoitov <ast@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
Yonghong Song <yhs@fb.com>,
Masami Hiramatsu <mhiramat@kernel.org>,
Andy Lutomirski <luto@kernel.org>
Subject: [PATCH v2 00/14] x86/fault: #PF improvements, mostly related to USER bit
Date: Tue, 9 Feb 2021 18:33:32 -0800 [thread overview]
Message-ID: <cover.1612924255.git.luto@kernel.org> (raw)
This series is a whole bunch of page fault cleanups, plus a couple
of OOPS diagnostic improvements. The overall goals are to clean up
handling of the faulting CPL, the USER bit in the error_code, and
the log messages generated by #PF OOPSes.
This series can also be seen as CET preparation. CET introduces the
WRUSS instruction, which is the very first way for CPL 0 code to
cause a #PF fault with the USER bit set. Let's get the page fault
code into shape before we start using WRUSS :)
Changes from v1:
- Various changelog improvements.
- Reorder patches (SMAP moved after SMEP)
- Add the efi_recover_from_page_fault() patch
- Tidy up and improve the AMD erratum detection code
Andy Lutomirski (14):
x86/fault: Fix AMD erratum #91 errata fixup for user code
x86/fault: Skip the AMD erratum #91 workaround on unaffected CPUs
x86/fault: Fold mm_fault_error() into do_user_addr_fault()
x86/fault/32: Move is_f00f_bug() to do_kern_addr_fault()
x86/fault: Document the locking in the fault_signal_pending() path
x86/fault: Correct a few user vs kernel checks wrt WRUSS
x86/fault: Improve kernel-executing-user-memory handling
x86/fault: Skip erratum #93 workaround on new CPUs
x86/fault: Split the OOPS code out from no_context()
x86/fault: Bypass no_context() for implicit kernel faults from
usermode
x86/fault: Rename no_context() to kernelmode_fixup_or_oops()
x86/fault: Don't look for extable entries for SMEP violations
x86/fault: Don't run fixups for SMAP violations
x86/fault, x86/efi: Fix and rename efi_recover_from_page_fault()
arch/x86/include/asm/efi.h | 2 +-
arch/x86/mm/fault.c | 380 +++++++++++++++++++--------------
arch/x86/platform/efi/quirks.c | 16 +-
3 files changed, 227 insertions(+), 171 deletions(-)
--
2.29.2
next reply other threads:[~2021-02-10 2:37 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-10 2:33 Andy Lutomirski [this message]
2021-02-10 2:33 ` [PATCH v2 01/14] x86/fault: Fix AMD erratum #91 errata fixup for user code Andy Lutomirski
2021-02-10 7:34 ` Christoph Hellwig
2021-02-10 17:45 ` [tip: x86/mm] " tip-bot2 for Andy Lutomirski
2021-02-10 2:33 ` [PATCH v2 02/14] x86/fault: Skip the AMD erratum #91 workaround on unaffected CPUs Andy Lutomirski
2021-02-10 17:45 ` [tip: x86/mm] " tip-bot2 for Andy Lutomirski
2021-02-10 2:33 ` [PATCH v2 03/14] x86/fault: Fold mm_fault_error() into do_user_addr_fault() Andy Lutomirski
2021-02-10 17:45 ` [tip: x86/mm] " tip-bot2 for Andy Lutomirski
2021-02-10 2:33 ` [PATCH v2 04/14] x86/fault/32: Move is_f00f_bug() to do_kern_addr_fault() Andy Lutomirski
2021-02-10 17:45 ` [tip: x86/mm] " tip-bot2 for Andy Lutomirski
2021-02-10 2:33 ` [PATCH v2 05/14] x86/fault: Document the locking in the fault_signal_pending() path Andy Lutomirski
2021-02-10 17:45 ` [tip: x86/mm] " tip-bot2 for Andy Lutomirski
2021-02-10 2:33 ` [PATCH v2 06/14] x86/fault: Correct a few user vs kernel checks wrt WRUSS Andy Lutomirski
2021-02-10 17:45 ` [tip: x86/mm] " tip-bot2 for Andy Lutomirski
2021-02-10 2:33 ` [PATCH v2 07/14] x86/fault: Improve kernel-executing-user-memory handling Andy Lutomirski
2021-02-10 17:45 ` [tip: x86/mm] " tip-bot2 for Andy Lutomirski
2021-02-10 2:33 ` [PATCH v2 08/14] x86/fault: Skip erratum #93 workaround on new CPUs Andy Lutomirski
2021-02-10 6:06 ` Andy Lutomirski
2021-02-10 13:29 ` Borislav Petkov
2021-02-10 16:09 ` Andy Lutomirski
2021-02-10 2:33 ` [PATCH v2 09/14] x86/fault: Split the OOPS code out from no_context() Andy Lutomirski
2021-02-10 17:45 ` [tip: x86/mm] " tip-bot2 for Andy Lutomirski
2021-02-10 2:33 ` [PATCH v2 10/14] x86/fault: Bypass no_context() for implicit kernel faults from usermode Andy Lutomirski
2021-02-10 17:45 ` [tip: x86/mm] " tip-bot2 for Andy Lutomirski
2021-02-10 2:33 ` [PATCH v2 11/14] x86/fault: Rename no_context() to kernelmode_fixup_or_oops() Andy Lutomirski
2021-02-10 17:45 ` [tip: x86/mm] " tip-bot2 for Andy Lutomirski
2021-02-10 2:33 ` [PATCH v2 12/14] x86/fault: Don't look for extable entries for SMEP violations Andy Lutomirski
2021-02-10 17:45 ` [tip: x86/mm] " tip-bot2 for Andy Lutomirski
2021-02-10 2:33 ` [PATCH v2 13/14] x86/fault: Don't run fixups for SMAP violations Andy Lutomirski
2021-02-10 17:45 ` [tip: x86/mm] " tip-bot2 for Andy Lutomirski
2021-02-10 2:33 ` [PATCH v2 14/14] x86/fault, x86/efi: Fix and rename efi_recover_from_page_fault() Andy Lutomirski
2021-02-10 17:45 ` [tip: x86/mm] x86/{fault,efi}: " tip-bot2 for Andy Lutomirski
2021-02-11 8:38 ` [PATCH v2 14/14] x86/fault, x86/efi: " Ard Biesheuvel
2021-02-10 13:57 ` [RFC][PATCH] kprobes: Remove kprobe::fault_handler Peter Zijlstra
2021-02-10 19:09 ` Christoph Hellwig
2021-02-10 19:47 ` Alexei Starovoitov
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