linux-kernel - [PATCH v3 00/11] Introduce cmpxchg128() -- aka. the demise of cmpxchg

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <20230515075659.118447996@infradead.org>
Date:   Mon, 15 May 2023 09:56:59 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     torvalds@...ux-foundation.org
Cc:     corbet@....net, will@...nel.org, peterz@...radead.org,
        boqun.feng@...il.com, mark.rutland@....com,
        catalin.marinas@....com, dennis@...nel.org, tj@...nel.org,
        cl@...ux.com, hca@...ux.ibm.com, gor@...ux.ibm.com,
        agordeev@...ux.ibm.com, borntraeger@...ux.ibm.com,
        svens@...ux.ibm.com, tglx@...utronix.de, mingo@...hat.com,
        bp@...en8.de, dave.hansen@...ux.intel.com, x86@...nel.org,
        hpa@...or.com, joro@...tes.org, suravee.suthikulpanit@....com,
        robin.murphy@....com, dwmw2@...radead.org,
        baolu.lu@...ux.intel.com, Arnd Bergmann <arnd@...db.de>,
        Herbert Xu <herbert@...dor.apana.org.au>, davem@...emloft.net,
        penberg@...nel.org, rientjes@...gle.com, iamjoonsoo.kim@....com,
        Andrew Morton <akpm@...ux-foundation.org>, vbabka@...e.cz,
        roman.gushchin@...ux.dev, 42.hyeyoo@...il.com,
        linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org, linux-s390@...r.kernel.org,
        iommu@...ts.linux.dev, linux-arch@...r.kernel.org,
        linux-crypto@...r.kernel.org
Subject: [PATCH v3 00/11] Introduce cmpxchg128() -- aka. the demise of cmpxchg_double()

Hi!

I seem to have forgotten to post this series last release; so here goes. I'm
really hoping to merge it and forget about it.


Since Linus hated on cmpxchg_double(), a few patches to get rid of it, as
proposed here:

  https://lkml.kernel.org/r/Y2U3WdU61FvYlpUh@hirez.programming.kicks-ass.net


These patches are based on 6.4.0-rc2.

Available here:

  git://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git core/wip-u128

Since v2:

 - reworked this_cpu_cmpxchg() to not implicity do u128 but provide explicit
   this_cpu_cmpxchg128() (arnd)
 - added try_cmpxchg12_local() (per the addition of the try_cmpxchg*_local()
   family of functions)
 - slight cleanup of the SLUB conversion (due to rebase and having to touch it)
 - added a 'cleanup' patch for SLUB, since I was staring at that anyway

Since v1:

 - rebaed on Eric's ghash cleanups (hence the cryptodev-2.6 dependency)
 - rebased on Heiko's s390/cpum_sf CDSG patch
 - fixed up a bunch of arch code
 - fixed up the inline asm to use 'u128 *' mem argument so the compiler knows
   how wide the modification is.
 - reworked the percpu thing to use union based type-punning instead of
   _Generic() based casts.

---
 Documentation/core-api/this_cpu_ops.rst     |   2 -
 arch/arm64/include/asm/atomic_ll_sc.h       |  56 ++++----
 arch/arm64/include/asm/atomic_lse.h         |  39 +++---
 arch/arm64/include/asm/cmpxchg.h            |  48 ++-----
 arch/arm64/include/asm/percpu.h             |  30 +++--
 arch/s390/include/asm/cmpxchg.h             |  32 +----
 arch/s390/include/asm/cpu_mf.h              |   2 +-
 arch/s390/include/asm/percpu.h              |  34 +++--
 arch/s390/kernel/perf_cpum_sf.c             |  16 +--
 arch/x86/include/asm/cmpxchg.h              |  25 ----
 arch/x86/include/asm/cmpxchg_32.h           |   2 +-
 arch/x86/include/asm/cmpxchg_64.h           |  63 ++++++++-
 arch/x86/include/asm/percpu.h               | 100 +++++++++------
 drivers/iommu/amd/amd_iommu_types.h         |   9 +-
 drivers/iommu/amd/iommu.c                   |  10 +-
 drivers/iommu/intel/irq_remapping.c         |   8 +-
 include/asm-generic/percpu.h                |  66 ++--------
 include/crypto/b128ops.h                    |  14 +-
 include/linux/atomic/atomic-arch-fallback.h |  95 +++++++++++++-
 include/linux/atomic/atomic-instrumented.h  |  93 ++++++++++++--
 include/linux/dmar.h                        | 125 +++++++++---------
 include/linux/percpu-defs.h                 |  38 ------
 include/linux/slub_def.h                    |  12 +-
 include/linux/types.h                       |   5 +
 include/uapi/linux/types.h                  |   4 +
 lib/crypto/curve25519-hacl64.c              |   2 -
 lib/crypto/poly1305-donna64.c               |   2 -
 mm/slab.h                                   |  49 ++++++-
 mm/slub.c                                   | 191 ++++++++++++++--------------
 scripts/atomic/gen-atomic-fallback.sh       |   4 +-
 scripts/atomic/gen-atomic-instrumented.sh   |  19 +--
 31 files changed, 667 insertions(+), 528 deletions(-)