From patchwork Tue May 15 22:51:23 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bart Van Assche X-Patchwork-Id: 10402243 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 1483E601E9 for ; Tue, 15 May 2018 22:52:23 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 06B5128622 for ; Tue, 15 May 2018 22:52:23 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id EF9C928687; Tue, 15 May 2018 22:52:22 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.8 required=2.0 tests=BAYES_00,DKIM_SIGNED, MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI, T_DKIM_INVALID autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 2EEF528685 for ; Tue, 15 May 2018 22:52:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752272AbeEOWvi (ORCPT ); Tue, 15 May 2018 18:51:38 -0400 Received: from esa5.hgst.iphmx.com ([216.71.153.144]:32504 "EHLO esa5.hgst.iphmx.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752257AbeEOWvd (ORCPT ); Tue, 15 May 2018 18:51:33 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=wdc.com; i=@wdc.com; q=dns/txt; s=dkim.wdc.com; t=1526424694; x=1557960694; h=from:to:cc:subject:date:message-id:in-reply-to: references; bh=YidHuBakiwIKluC/ohoBBG0tv2/z8Jl27zXyrtJ0wzI=; b=WDngwYH4MIzyyfaJRUl8mCIsjvsV75GdW8Cvza7bSDDilJPZLSJJ61S3 eeohGQezyv6wH5imnleqAvcY6bFWz53yg8B2ruRcwvQPJKoaigYOZL7Nx G4cDlKN7IZnyQFQA0/Zz91IrkZ+k7H/8P3DwIAb6YYBF2wYkTW2DwreJg NeavwQgSc8dBU6iyYFUfvV5PGwzMqNnnAh7DcTm6jbvLYlpPKC5oXZ8h7 aqpS2YeSV6gz7ynJcE42aeF2wepx0NtbDRQn+KMykGEbJ1woTMciph63x BHST7AkjY/qlu0weBZYGtpQ6FTR6snSPeHTYUaX9MgDM0l/W5F/s13ZXW g==; X-IronPort-AV: E=Sophos;i="5.49,404,1520870400"; d="scan'208";a="78257000" Received: from uls-op-cesaip01.wdc.com (HELO uls-op-cesaep01.wdc.com) ([199.255.45.14]) by ob1.hgst.iphmx.com with ESMTP; 16 May 2018 06:51:33 +0800 Received: from uls-op-cesaip01.wdc.com ([10.248.3.36]) by uls-op-cesaep01.wdc.com with ESMTP; 15 May 2018 15:42:39 -0700 Received: from thinkpad-bart.sdcorp.global.sandisk.com ([10.111.70.1]) by uls-op-cesaip01.wdc.com with ESMTP; 15 May 2018 15:51:32 -0700 From: Bart Van Assche To: Jens Axboe Cc: linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, Christoph Hellwig , Bart Van Assche , Catalin Marinas , Will Deacon , Tony Luck , Fenghua Yu , Geert Uytterhoeven , "James E.J. Bottomley" , Helge Deller , Benjamin Herrenschmidt , Paul Mackerras , Michael Ellerman , Martin Schwidefsky , Heiko Carstens , "David S . Miller" , Thomas Gleixner , Ingo Molnar , "H . Peter Anvin" , Chris Zankel , Max Filippov , Arnd Bergmann Subject: [PATCH v9 1/2] arch/*: Add CONFIG_ARCH_HAVE_CMPXCHG64 Date: Tue, 15 May 2018 15:51:23 -0700 Message-Id: <20180515225124.20428-5-bart.vanassche@wdc.com> X-Mailer: git-send-email 2.16.3 In-Reply-To: <20180515225124.20428-1-bart.vanassche@wdc.com> References: <20180515225124.20428-1-bart.vanassche@wdc.com> Sender: linux-block-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The next patch in this series introduces a call to cmpxchg64() in the block layer core for those architectures on which this functionality is available. Make it possible to test whether cmpxchg64() is available by introducing CONFIG_ARCH_HAVE_CMPXCHG64. Signed-off-by: Bart Van Assche Cc: Catalin Marinas Cc: Will Deacon Cc: Tony Luck Cc: Fenghua Yu Cc: Geert Uytterhoeven Cc: "James E.J. Bottomley" Cc: Helge Deller Cc: Benjamin Herrenschmidt Cc: Paul Mackerras Cc: Michael Ellerman Cc: Martin Schwidefsky Cc: Heiko Carstens Cc: David S. Miller Cc: Thomas Gleixner Cc: Ingo Molnar Cc: H. Peter Anvin Cc: Chris Zankel Cc: Max Filippov Cc: Arnd Bergmann f --- .../features/locking/cmpxchg64/arch-support.txt | 31 ++++++++++++++++++++++ arch/Kconfig | 3 +++ arch/alpha/Kconfig | 1 + arch/arm/Kconfig | 1 + arch/arm64/Kconfig | 1 + arch/ia64/Kconfig | 1 + arch/m68k/Kconfig | 1 + arch/mips/Kconfig | 1 + arch/parisc/Kconfig | 1 + arch/powerpc/Kconfig | 1 + arch/s390/Kconfig | 1 + arch/sparc/Kconfig | 1 + arch/x86/Kconfig | 1 + arch/xtensa/Kconfig | 1 + 14 files changed, 46 insertions(+) create mode 100644 Documentation/features/locking/cmpxchg64/arch-support.txt diff --git a/Documentation/features/locking/cmpxchg64/arch-support.txt b/Documentation/features/locking/cmpxchg64/arch-support.txt new file mode 100644 index 000000000000..65b3290ce5d5 --- /dev/null +++ b/Documentation/features/locking/cmpxchg64/arch-support.txt @@ -0,0 +1,31 @@ +# +# Feature name: cmpxchg64 +# Kconfig: ARCH_HAVE_CMPXCHG64 +# description: arch supports the cmpxchg64() API +# + ----------------------- + | arch |status| + ----------------------- + | alpha: | ok | + | arc: | TODO | + | arm: |!thumb| + | arm64: | ok | + | c6x: | TODO | + | h8300: | TODO | + | hexagon: | TODO | + | ia64: | ok | + | m68k: | ok | + | microblaze: | TODO | + | mips: |64-bit| + | nios2: | TODO | + | openrisc: | TODO | + | parisc: | ok | + | powerpc: |64-bit| + | s390: | ok | + | sh: | TODO | + | sparc: | ok | + | um: | TODO | + | unicore32: | TODO | + | x86: | ok | + | xtensa: | ok | + ----------------------- diff --git a/arch/Kconfig b/arch/Kconfig index 8e0d665c8d53..bd54eb125b15 100644 --- a/arch/Kconfig +++ b/arch/Kconfig @@ -358,6 +358,9 @@ config HAVE_ALIGNED_STRUCT_PAGE on a struct page for better performance. However selecting this might increase the size of a struct page by a word. +config ARCH_HAVE_CMPXCHG64 + bool + config HAVE_CMPXCHG_LOCAL bool diff --git a/arch/alpha/Kconfig b/arch/alpha/Kconfig index b2022885ced8..94fc28e30ed2 100644 --- a/arch/alpha/Kconfig +++ b/arch/alpha/Kconfig @@ -16,6 +16,7 @@ config ALPHA select GENERIC_IRQ_SHOW select ARCH_WANT_IPC_PARSE_VERSION select ARCH_HAVE_NMI_SAFE_CMPXCHG + select ARCH_HAVE_CMPXCHG64 select AUDIT_ARCH select GENERIC_CLOCKEVENTS select GENERIC_CPU_VULNERABILITIES diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index a7f8e7f4b88f..7be06e46d329 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -21,6 +21,7 @@ config ARM select ARCH_SUPPORTS_ATOMIC_RMW select ARCH_USE_BUILTIN_BSWAP select ARCH_USE_CMPXCHG_LOCKREF + select ARCH_HAVE_CMPXCHG64 if !THUMB2_KERNEL select ARCH_WANT_IPC_PARSE_VERSION select BUILDTIME_EXTABLE_SORT if MMU select CLONE_BACKWARDS diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index eb2cf4938f6d..998e454a51b5 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -23,6 +23,7 @@ config ARM64 select ARCH_HAS_STRICT_MODULE_RWX select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST select ARCH_HAVE_NMI_SAFE_CMPXCHG + select ARCH_HAVE_CMPXCHG64 select ARCH_INLINE_READ_LOCK if !PREEMPT select ARCH_INLINE_READ_LOCK_BH if !PREEMPT select ARCH_INLINE_READ_LOCK_IRQ if !PREEMPT diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig index bbe12a038d21..b99a7fd9efec 100644 --- a/arch/ia64/Kconfig +++ b/arch/ia64/Kconfig @@ -42,6 +42,7 @@ config IA64 select GENERIC_IRQ_SHOW select GENERIC_IRQ_LEGACY select ARCH_HAVE_NMI_SAFE_CMPXCHG + select ARCH_HAVE_CMPXCHG64 select GENERIC_IOMAP select GENERIC_SMP_IDLE_THREAD select ARCH_TASK_STRUCT_ON_STACK diff --git a/arch/m68k/Kconfig b/arch/m68k/Kconfig index 785612b576f7..9249de31414b 100644 --- a/arch/m68k/Kconfig +++ b/arch/m68k/Kconfig @@ -12,6 +12,7 @@ config M68K select HAVE_UID16 select VIRT_TO_BUS select ARCH_HAVE_NMI_SAFE_CMPXCHG if RMW_INSNS + select ARCH_HAVE_CMPXCHG64 select GENERIC_CPU_DEVICES select GENERIC_IOMAP select GENERIC_STRNCPY_FROM_USER if MMU diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index 225c95da23ce..7f453e7cb9e4 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -10,6 +10,7 @@ config MIPS select ARCH_SUPPORTS_UPROBES select ARCH_USE_BUILTIN_BSWAP select ARCH_USE_CMPXCHG_LOCKREF if 64BIT + select ARCH_HAVE_CMPXCHG64 if 64BIT select ARCH_USE_QUEUED_RWLOCKS select ARCH_USE_QUEUED_SPINLOCKS select ARCH_WANT_IPC_PARSE_VERSION diff --git a/arch/parisc/Kconfig b/arch/parisc/Kconfig index fc5a574c3482..deae8720861e 100644 --- a/arch/parisc/Kconfig +++ b/arch/parisc/Kconfig @@ -31,6 +31,7 @@ config PARISC select GENERIC_IRQ_PROBE select GENERIC_PCI_IOMAP select ARCH_HAVE_NMI_SAFE_CMPXCHG + select ARCH_HAVE_CMPXCHG64 select GENERIC_SMP_IDLE_THREAD select GENERIC_CPU_DEVICES select GENERIC_STRNCPY_FROM_USER diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index c32a181a7cbb..315fc1e46baa 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig @@ -150,6 +150,7 @@ config PPC select ARCH_HAS_UBSAN_SANITIZE_ALL select ARCH_HAS_ZONE_DEVICE if PPC_BOOK3S_64 select ARCH_HAVE_NMI_SAFE_CMPXCHG + select ARCH_HAVE_CMPXCHG64 select ARCH_MIGHT_HAVE_PC_PARPORT select ARCH_MIGHT_HAVE_PC_SERIO select ARCH_OPTIONAL_KERNEL_RWX if ARCH_HAS_STRICT_KERNEL_RWX diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig index 199ac3e4da1d..b06b34ae8b3d 100644 --- a/arch/s390/Kconfig +++ b/arch/s390/Kconfig @@ -74,6 +74,7 @@ config S390 select ARCH_HAS_STRICT_MODULE_RWX select ARCH_HAS_UBSAN_SANITIZE_ALL select ARCH_HAVE_NMI_SAFE_CMPXCHG + select ARCH_HAVE_CMPXCHG64 select ARCH_INLINE_READ_LOCK select ARCH_INLINE_READ_LOCK_BH select ARCH_INLINE_READ_LOCK_IRQ diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig index 8767e45f1b2b..cd41bf0d5afd 100644 --- a/arch/sparc/Kconfig +++ b/arch/sparc/Kconfig @@ -76,6 +76,7 @@ config SPARC64 select PERF_USE_VMALLOC select IRQ_PREFLOW_FASTEOI select ARCH_HAVE_NMI_SAFE_CMPXCHG + select ARCH_HAVE_CMPXCHG64 select HAVE_C_RECORDMCOUNT select NO_BOOTMEM select HAVE_ARCH_AUDITSYSCALL diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index c07f492b871a..a5bcbb179ff2 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -68,6 +68,7 @@ config X86 select ARCH_HAS_UBSAN_SANITIZE_ALL select ARCH_HAS_ZONE_DEVICE if X86_64 select ARCH_HAVE_NMI_SAFE_CMPXCHG + select ARCH_HAVE_CMPXCHG64 select ARCH_MIGHT_HAVE_ACPI_PDC if ACPI select ARCH_MIGHT_HAVE_PC_PARPORT select ARCH_MIGHT_HAVE_PC_SERIO diff --git a/arch/xtensa/Kconfig b/arch/xtensa/Kconfig index c921e8bccdc8..8234278a821d 100644 --- a/arch/xtensa/Kconfig +++ b/arch/xtensa/Kconfig @@ -23,6 +23,7 @@ config XTENSA select HAVE_DMA_CONTIGUOUS select HAVE_EXIT_THREAD select HAVE_FUNCTION_TRACER + select ARCH_HAVE_CMPXCHG64 select HAVE_FUTEX_CMPXCHG if !MMU select HAVE_HW_BREAKPOINT if PERF_EVENTS select HAVE_IRQ_TIME_ACCOUNTING