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Tue, 04 Apr 2023 09:42:59 -0400 X-MC-Unique: pi0Svwr4ODigORJ7n6yb0Q-1 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.rdu2.redhat.com [10.11.54.6]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 0FC07101A54F; Tue, 4 Apr 2023 13:42:57 +0000 (UTC) Received: from ypodemsk.tlv.csb (unknown [10.39.194.160]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 390002166B26; Tue, 4 Apr 2023 13:42:49 +0000 (UTC) From: Yair Podemsky To: linux@armlinux.org.uk, mpe@ellerman.id.au, npiggin@gmail.com, christophe.leroy@csgroup.eu, hca@linux.ibm.com, gor@linux.ibm.com, agordeev@linux.ibm.com, borntraeger@linux.ibm.com, svens@linux.ibm.com, davem@davemloft.net, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, will@kernel.org, aneesh.kumar@linux.ibm.com, akpm@linux-foundation.org, peterz@infradead.org, arnd@arndb.de, keescook@chromium.org, paulmck@kernel.org, jpoimboe@kernel.org, samitolvanen@google.com, frederic@kernel.org, ardb@kernel.org, juerg.haefliger@canonical.com, rmk+kernel@armlinux.org.uk, geert+renesas@glider.be, tony@atomide.com, linus.walleij@linaro.org, sebastian.reichel@collabora.com, nick.hawkins@hpe.com, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, sparclinux@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, mtosatti@redhat.com, vschneid@redhat.com, dhildenb@redhat.com Cc: ypodemsk@redhat.com, alougovs@redhat.com Subject: [PATCH 1/3] arch: Introduce ARCH_HAS_CPUMASK_BITS Date: Tue, 4 Apr 2023 16:42:22 +0300 Message-Id: <20230404134224.137038-2-ypodemsk@redhat.com> In-Reply-To: <20230404134224.137038-1-ypodemsk@redhat.com> References: <20230404134224.137038-1-ypodemsk@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 3.1 on 10.11.54.6 X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: E92A7180007 X-Stat-Signature: g7yh99dsu5hbfbr85xcto1qucmhhcbxo X-Rspam-User: X-HE-Tag: 1680615786-212569 X-HE-Meta: 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 lflxIfb7 qxyjGvWxkQUIZ2ZLpDNAeVXCPKQ4MUbBx+plxdD1sLl+wFnb3rgqlFTCWpJLS84hS+03VwlkETn4KgH2yJBABqZJ84Mcasil7X3q+7njd5MV/ImrOc3BWcl3TvrBvNh7Md1QOEpx+OA/gyG/E0WPTiZIk6pF3VylMEcVEbN0oDo0zdrlFT9aF+WcmX1YUSE40UvrdLBuOiEofvhC6AWa5wm2tXL5c7marcKmrhd9j6kQs2fsXMU1pbU6dMpL83bVTveB02nV4H5Xvrec+JgO77Cjmyl6ZLbcY6iih0zNTtMRWW+VAO+1pE1pZ0K2uyTxmgkaJQJh8K/IAu6w8PqyFkSwxhfRU4KKoyvFA8zO1iCnaO8A= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Some architectures set and maintain the mm_cpumask bits when loading or removing process from cpu. This Kconfig will mark those to allow different behavior between kernels that maintain the mm_cpumask and those that do not. Signed-off-by: Yair Podemsky --- arch/Kconfig | 8 ++++++++ arch/arm/Kconfig | 1 + arch/powerpc/Kconfig | 1 + arch/s390/Kconfig | 1 + arch/sparc/Kconfig | 1 + arch/x86/Kconfig | 1 + 6 files changed, 13 insertions(+) diff --git a/arch/Kconfig b/arch/Kconfig index e3511afbb7f2..ec5559779e9f 100644 --- a/arch/Kconfig +++ b/arch/Kconfig @@ -1434,6 +1434,14 @@ config ARCH_HAS_NONLEAF_PMD_YOUNG address translations. Page table walkers that clear the accessed bit may use this capability to reduce their search space. +config ARCH_HAS_CPUMASK_BITS + bool + help + Architectures that select this option set bits on the mm_cpumask + to mark which cpus loaded the mm, The mask can then be used to + control mm specific actions such as tlb_flush. + + source "kernel/gcov/Kconfig" source "scripts/gcc-plugins/Kconfig" diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index e24a9820e12f..6111059a68a3 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -70,6 +70,7 @@ config ARM select GENERIC_SCHED_CLOCK select GENERIC_SMP_IDLE_THREAD select HARDIRQS_SW_RESEND + select ARCH_HAS_CPUMASK_BITS select HAVE_ARCH_AUDITSYSCALL if AEABI && !OABI_COMPAT select HAVE_ARCH_BITREVERSE if (CPU_32v7M || CPU_32v7) && !CPU_32v6 select HAVE_ARCH_JUMP_LABEL if !XIP_KERNEL && !CPU_ENDIAN_BE32 && MMU diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index a6c4407d3ec8..2fd0160f4f8e 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig @@ -144,6 +144,7 @@ config PPC select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST select ARCH_HAS_UACCESS_FLUSHCACHE select ARCH_HAS_UBSAN_SANITIZE_ALL + select ARCH_HAS_CPUMASK_BITS select ARCH_HAVE_NMI_SAFE_CMPXCHG select ARCH_KEEP_MEMBLOCK select ARCH_MIGHT_HAVE_PC_PARPORT diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig index 9809c74e1240..b2de5ee07faf 100644 --- a/arch/s390/Kconfig +++ b/arch/s390/Kconfig @@ -86,6 +86,7 @@ config S390 select ARCH_HAS_SYSCALL_WRAPPER select ARCH_HAS_UBSAN_SANITIZE_ALL select ARCH_HAS_VDSO_DATA + select ARCH_HAS_CPUMASK_BITS select ARCH_HAVE_NMI_SAFE_CMPXCHG select ARCH_INLINE_READ_LOCK select ARCH_INLINE_READ_LOCK_BH diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig index 84437a4c6545..f9e0cf26d447 100644 --- a/arch/sparc/Kconfig +++ b/arch/sparc/Kconfig @@ -98,6 +98,7 @@ config SPARC64 select ARCH_HAS_PTE_SPECIAL select PCI_DOMAINS if PCI select ARCH_HAS_GIGANTIC_PAGE + select ARCH_HAS_CPUMASK_BITS select HAVE_SOFTIRQ_ON_OWN_STACK select HAVE_SETUP_PER_CPU_AREA select NEED_PER_CPU_EMBED_FIRST_CHUNK diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index a825bf031f49..d98dfdf9c6b4 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -183,6 +183,7 @@ config X86 select HAVE_ARCH_THREAD_STRUCT_WHITELIST select HAVE_ARCH_STACKLEAK select HAVE_ARCH_TRACEHOOK + select ARCH_HAS_CPUMASK_BITS select HAVE_ARCH_TRANSPARENT_HUGEPAGE select HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD if X86_64 select HAVE_ARCH_USERFAULTFD_WP if X86_64 && USERFAULTFD -- 2.31.1