From: Peter Zijlstra <peterz@infradead.org>
To: Rick Edgecombe <rick.p.edgecombe@intel.com>
Cc: x86@kernel.org, "H . Peter Anvin" <hpa@zytor.com>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>,
linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org,
linux-mm@kvack.org, linux-arch@vger.kernel.org,
linux-api@vger.kernel.org, Arnd Bergmann <arnd@arndb.de>,
Andy Lutomirski <luto@kernel.org>,
Balbir Singh <bsingharora@gmail.com>,
Borislav Petkov <bp@alien8.de>,
Cyrill Gorcunov <gorcunov@gmail.com>,
Dave Hansen <dave.hansen@linux.intel.com>,
Eugene Syromiatnikov <esyr@redhat.com>,
Florian Weimer <fweimer@redhat.com>,
"H . J . Lu" <hjl.tools@gmail.com>, Jann Horn <jannh@google.com>,
Jonathan Corbet <corbet@lwn.net>,
Kees Cook <keescook@chromium.org>,
Mike Kravetz <mike.kravetz@oracle.com>,
Nadav Amit <nadav.amit@gmail.com>,
Oleg Nesterov <oleg@redhat.com>, Pavel Machek <pavel@ucw.cz>,
Randy Dunlap <rdunlap@infradead.org>,
"Ravi V . Shankar" <ravi.v.shankar@intel.com>,
Weijiang Yang <weijiang.yang@intel.com>,
"Kirill A . Shutemov" <kirill.shutemov@linux.intel.com>,
John Allen <john.allen@amd.com>,
kcc@google.com, eranian@google.com, rppt@kernel.org,
jamorris@linux.microsoft.com, dethoma@microsoft.com,
akpm@linux-foundation.org, Yu-cheng Yu <yu-cheng.yu@intel.com>,
Peter Xu <peterx@redhat.com>
Subject: Re: [PATCH v3 13/37] mm: Move VM_UFFD_MINOR_BIT from 37 to 38
Date: Tue, 15 Nov 2022 12:20:02 +0100 [thread overview]
Message-ID: <Y3N14v0ddj/vVV+H@hirez.programming.kicks-ass.net> (raw)
In-Reply-To: <20221104223604.29615-14-rick.p.edgecombe@intel.com>
On Fri, Nov 04, 2022 at 03:35:40PM -0700, Rick Edgecombe wrote:
> From: Yu-cheng Yu <yu-cheng.yu@intel.com>
>
> To introduce VM_SHADOW_STACK as VM_HIGH_ARCH_BIT (37), and make all
> VM_HIGH_ARCH_BITs stay together, move VM_UFFD_MINOR_BIT from 37 to 38.
Why thought ?!? Changelog utterly fails to provide rationale.
next prev parent reply other threads:[~2022-11-15 11:20 UTC|newest]
Thread overview: 104+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-11-04 22:35 [PATCH v3 00/37] Shadow stacks for userspace Rick Edgecombe
2022-11-04 22:35 ` [PATCH v3 01/37] Documentation/x86: Add CET description Rick Edgecombe
2022-11-04 22:35 ` [PATCH v3 02/37] x86/cet/shstk: Add Kconfig option for Shadow Stack Rick Edgecombe
2022-11-04 22:35 ` [PATCH v3 03/37] x86/cpufeatures: Add CPU feature flags for shadow stacks Rick Edgecombe
2022-11-07 17:41 ` Borislav Petkov
2022-11-04 22:35 ` [PATCH v3 04/37] x86/cpufeatures: Enable CET CR4 bit for shadow stack Rick Edgecombe
2022-11-07 18:00 ` Borislav Petkov
2022-11-07 18:19 ` Edgecombe, Rick P
2022-11-07 18:37 ` Borislav Petkov
2022-11-07 19:19 ` Edgecombe, Rick P
2022-11-07 19:30 ` Borislav Petkov
2022-11-07 19:33 ` Edgecombe, Rick P
2022-11-04 22:35 ` [PATCH v3 05/37] x86/fpu/xstate: Introduce CET MSR and XSAVES supervisor states Rick Edgecombe
2022-11-04 22:35 ` [PATCH v3 06/37] x86/fpu: Add helper for modifying xstate Rick Edgecombe
2022-11-04 22:35 ` [PATCH v3 07/37] x86/cet: Add user control-protection fault handler Rick Edgecombe
2022-11-04 22:35 ` [PATCH v3 08/37] x86/mm: Remove _PAGE_DIRTY from kernel RO pages Rick Edgecombe
2022-11-04 22:35 ` [PATCH v3 09/37] x86/mm: Move pmd_write(), pud_write() up in the file Rick Edgecombe
2022-11-04 22:35 ` [PATCH v3 10/37] x86/mm: Introduce _PAGE_COW Rick Edgecombe
2022-11-04 22:35 ` [PATCH v3 11/37] x86/mm: Update pte_modify for _PAGE_COW Rick Edgecombe
2022-11-04 22:35 ` [PATCH v3 12/37] x86/mm: Update ptep_set_wrprotect() and pmdp_set_wrprotect() for transition from _PAGE_DIRTY to _PAGE_COW Rick Edgecombe
2022-11-04 22:35 ` [PATCH v3 13/37] mm: Move VM_UFFD_MINOR_BIT from 37 to 38 Rick Edgecombe
2022-11-15 11:20 ` Peter Zijlstra [this message]
2022-11-15 17:18 ` Edgecombe, Rick P
2022-11-04 22:35 ` [PATCH v3 14/37] mm: Introduce VM_SHADOW_STACK for shadow stack memory Rick Edgecombe
2022-11-04 22:35 ` [PATCH v3 15/37] x86/mm: Check Shadow Stack page fault errors Rick Edgecombe
2022-11-15 11:47 ` Peter Zijlstra
2022-11-15 20:03 ` Edgecombe, Rick P
2022-11-15 21:07 ` Peter Zijlstra
2022-11-15 23:13 ` Edgecombe, Rick P
2022-11-16 10:09 ` Peter Zijlstra
2022-11-04 22:35 ` [PATCH v3 16/37] x86/mm: Update maybe_mkwrite() for shadow stack Rick Edgecombe
2022-11-04 22:35 ` [PATCH v3 17/37] mm: Fixup places that call pte_mkwrite() directly Rick Edgecombe
2022-11-04 22:35 ` [PATCH v3 18/37] mm: Add guard pages around a shadow stack Rick Edgecombe
2022-11-15 12:04 ` Peter Zijlstra
2022-11-15 20:40 ` Edgecombe, Rick P
2022-11-15 20:56 ` Peter Zijlstra
2022-11-15 21:49 ` Edgecombe, Rick P
2022-11-04 22:35 ` [PATCH v3 19/37] mm/mmap: Add shadow stack pages to memory accounting Rick Edgecombe
2022-11-04 22:35 ` [PATCH v3 20/37] mm/mprotect: Exclude shadow stack from preserve_write Rick Edgecombe
2022-11-15 12:05 ` Peter Zijlstra
2022-11-15 20:41 ` Edgecombe, Rick P
2022-11-04 22:35 ` [PATCH v3 21/37] mm: Re-introduce vm_flags to do_mmap() Rick Edgecombe
2022-11-04 22:35 ` [PATCH v3 22/37] mm: Don't allow write GUPs to shadow stack memory Rick Edgecombe
2022-11-04 22:35 ` [PATCH v3 23/37] mm: Warn on shadow stack memory in wrong vma Rick Edgecombe
2022-11-04 22:35 ` [PATCH v3 24/37] x86: Introduce userspace API for CET enabling Rick Edgecombe
2022-11-15 12:26 ` Peter Zijlstra
2022-11-15 13:03 ` Peter Zijlstra
2022-11-15 20:55 ` Edgecombe, Rick P
2022-11-15 14:25 ` Peter Zijlstra
2022-11-15 20:55 ` Edgecombe, Rick P
2022-11-04 22:35 ` [PATCH v3 25/37] x86/shstk: Add user-mode shadow stack support Rick Edgecombe
2022-11-15 12:32 ` Peter Zijlstra
2022-11-15 21:46 ` Edgecombe, Rick P
2022-11-04 22:35 ` [PATCH v3 26/37] x86/shstk: Handle thread shadow stack Rick Edgecombe
2022-11-04 22:35 ` [PATCH v3 27/37] x86/shstk: Introduce routines modifying shstk Rick Edgecombe
2022-11-15 14:18 ` Peter Zijlstra
2022-11-15 23:42 ` Edgecombe, Rick P
2022-11-16 10:18 ` Peter Zijlstra
2022-11-16 22:38 ` Edgecombe, Rick P
2022-11-17 14:17 ` Peter Zijlstra
2022-11-18 17:05 ` Edgecombe, Rick P
2022-11-15 14:22 ` Peter Zijlstra
2022-11-15 20:56 ` Edgecombe, Rick P
2022-11-04 22:35 ` [PATCH v3 28/37] x86/shstk: Handle signals for shadow stack Rick Edgecombe
2022-11-04 22:35 ` [PATCH v3 29/37] x86/shstk: Introduce map_shadow_stack syscall Rick Edgecombe
2022-11-04 22:35 ` [PATCH v3 30/37] x86/shstk: Support wrss for userspace Rick Edgecombe
2022-11-04 22:35 ` [PATCH v3 31/37] x86: Expose thread features in /proc/$PID/status Rick Edgecombe
2022-11-04 22:35 ` [PATCH v3 32/37] x86/cet/shstk: Wire in CET interface Rick Edgecombe
2022-11-04 22:36 ` [PATCH v3 33/37] selftests/x86: Add shadow stack test Rick Edgecombe
2022-11-04 22:36 ` [PATCH v3 34/37] x86/fpu: Add helper for initing features Rick Edgecombe
2022-11-04 22:36 ` [PATCH v3 35/37] x86/cet: Add PTRACE interface for CET Rick Edgecombe
2022-11-15 14:43 ` Peter Zijlstra
2022-11-15 22:23 ` Edgecombe, Rick P
2022-11-17 12:25 ` Schimpe, Christina
2022-11-17 14:14 ` Peter Zijlstra
2022-11-18 17:20 ` Edgecombe, Rick P
2022-11-18 17:25 ` Schimpe, Christina
2022-11-17 19:57 ` Edgecombe, Rick P
2022-11-18 16:21 ` Schimpe, Christina
2022-11-18 17:18 ` Edgecombe, Rick P
2022-11-21 7:40 ` Mike Rapoport
2022-11-21 15:52 ` Edgecombe, Rick P
2022-11-22 9:36 ` Mike Rapoport
2022-11-04 22:36 ` [PATCH v3 36/37] x86/cet/shstk: Add ARCH_CET_UNLOCK Rick Edgecombe
2022-11-15 14:47 ` Peter Zijlstra
2022-11-15 20:01 ` Edgecombe, Rick P
2022-11-15 20:57 ` Peter Zijlstra
2022-11-15 21:00 ` Dave Hansen
2022-11-15 21:21 ` Peter Zijlstra
2022-11-04 22:36 ` [RFC 37/37] fs/binfmt_elf: Block old shstk elf bit Rick Edgecombe
2022-11-04 22:56 ` H.J. Lu
2022-11-06 9:33 ` Florian Weimer
2022-11-07 16:49 ` Edgecombe, Rick P
2022-11-07 16:55 ` Florian Weimer
2022-11-07 17:37 ` Edgecombe, Rick P
2022-11-07 19:10 ` H.J. Lu
2022-11-07 21:10 ` Edgecombe, Rick P
2022-11-07 21:21 ` H.J. Lu
2022-11-07 21:34 ` Edgecombe, Rick P
2022-11-07 21:47 ` H.J. Lu
2022-11-07 22:46 ` Edgecombe, Rick P
2022-11-07 23:45 ` H.J. Lu
2022-11-08 9:14 ` Florian Weimer
2022-11-07 16:49 ` Edgecombe, Rick P
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