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Tue, 20 Jun 2023 10:51:23 -0400 X-MC-Unique: x-AozXEzMu217ZwsSukKWg-1 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.rdu2.redhat.com [10.11.54.5]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 71CC488D51C; Tue, 20 Jun 2023 14:46:42 +0000 (UTC) Received: from ypodemsk.tlv.csb (unknown [10.39.195.147]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 905379E9C; Tue, 20 Jun 2023 14:46:34 +0000 (UTC) From: Yair Podemsky To: mtosatti@redhat.com, ppandit@redhat.com, david@redhat.com, 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, hpa@zytor.com, keescook@chromium.org, paulmck@kernel.org, frederic@kernel.org, will@kernel.org, peterz@infradead.org, ardb@kernel.org, samitolvanen@google.com, juerg.haefliger@canonical.com, arnd@arndb.de, rmk+kernel@armlinux.org.uk, geert+renesas@glider.be, linus.walleij@linaro.org, akpm@linux-foundation.org, sebastian.reichel@collabora.com, rppt@kernel.org, aneesh.kumar@linux.ibm.com, x86@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, linux-kernel@vger.kernel.org Cc: ypodemsk@redhat.com Subject: [PATCH v2 1/2] arch: Introduce ARCH_HAS_CPUMASK_BITS Date: Tue, 20 Jun 2023 17:46:17 +0300 Message-Id: <20230620144618.125703-2-ypodemsk@redhat.com> In-Reply-To: <20230620144618.125703-1-ypodemsk@redhat.com> References: <20230620144618.125703-1-ypodemsk@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 3.1 on 10.11.54.5 X-Rspamd-Server: rspam08 X-Rspamd-Queue-Id: 690BCA0008 X-Stat-Signature: tqj86hnbzyy7c7yowqfk7tyn194b6wjr X-Rspam-User: X-HE-Tag: 1687272690-39894 X-HE-Meta: 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 ro0BW4L1 KuniGRyOE2fqVoV+77T9Yfde9upMgAhoIcBa7rgFutW1nymBKpx36VV6bIcxd4HvyaFYhiYsskGieM11mTIX+bcENBPEHeN6A78yXfVuTV/lA7iTEmNTiYNZivI2OBxZl74hVooemO8ZjBI5ogai85ocrhOGVL9VNQfPkskWpoLudtkX86Ao9f2sB1RXqY09w2nAtEedbvS9qRT9eDN7swqmFgwZR9IEQeOTt5YqB0CwuohNi5kJYEiOUhJxQAKBZYE3NIHBauTk0e2n3EHTX8VcItnB6xzkrS+6an9rbx9gHRb04ukJu66n96Rod5gdVeVIF3euyOicYig7NmQ+3heip6A== 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 205fd23e0cad..953fbfa5a2ad 100644 --- a/arch/Kconfig +++ b/arch/Kconfig @@ -1466,6 +1466,14 @@ 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 0fb4b218f665..cd20e96bc1dc 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -70,6 +70,7 @@ config ARM select GENERIC_SMP_IDLE_THREAD select HARDIRQS_SW_RESEND select HAS_IOPORT + 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 bff5820b7cda..c9218722aa2f 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig @@ -156,6 +156,7 @@ 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 6dab9c1be508..60bf29bc3f87 100644 --- a/arch/s390/Kconfig +++ b/arch/s390/Kconfig @@ -84,6 +84,7 @@ 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 8535e19062f6..e8bf4d769306 100644 --- a/arch/sparc/Kconfig +++ b/arch/sparc/Kconfig @@ -99,6 +99,7 @@ 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 53bab123a8ee..b351421695f3 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -185,6 +185,7 @@ 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 -- 2.39.3