From nobody Wed Dec 17 17:44:30 2025 Received: from invmail4.hynix.com (exvmail4.skhynix.com [166.125.252.92]) by smtp.subspace.kernel.org (Postfix) with ESMTP id DB8482EAB89; Thu, 2 Oct 2025 08:13:25 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=166.125.252.92 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1759392810; cv=none; b=mpWvZ0fEUN5KsWf8Fw56iEDHhLmzuUxjzOjJWeXqYJm5GyzemtJu69JOvUh5DUYlJZORyg8FiOlXPdnsLSqsBS8HkmLmtZYBtg8jDGynm+6tEkj4X54ZcF3epaycLQ9JEXkFPZl/lS1njeZAKeT0NdAqKhtU4k1yEFG/qICvoFA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1759392810; c=relaxed/simple; bh=h//iPHlnVuvuWZaoIOCavmQljq7ds4KVfkx9Jf/hjms=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References; b=SH/3Fo/sxpiB2bUc/l6F6l9PV6lEG/VuB7YBIKxnu/V6foiu6HVrJfDbMkJkMkr8n6l2nPecwQpaDQypmbMZpX+HxEPOn2kpqjTeMUfa4zCPPGSkYUOS//+zuD2Ut6pflo922lyrxjN5HaVW52CRjY060ZdcrbKMneYjpGWY/qw= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=sk.com; spf=pass smtp.mailfrom=sk.com; arc=none smtp.client-ip=166.125.252.92 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=sk.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=sk.com X-AuditID: a67dfc5b-c2dff70000001609-34-68de340dfdf5 From: Byungchul Park To: linux-kernel@vger.kernel.org Cc: kernel_team@skhynix.com, torvalds@linux-foundation.org, damien.lemoal@opensource.wdc.com, linux-ide@vger.kernel.org, adilger.kernel@dilger.ca, linux-ext4@vger.kernel.org, mingo@redhat.com, peterz@infradead.org, will@kernel.org, tglx@linutronix.de, rostedt@goodmis.org, joel@joelfernandes.org, sashal@kernel.org, daniel.vetter@ffwll.ch, duyuyang@gmail.com, johannes.berg@intel.com, tj@kernel.org, tytso@mit.edu, willy@infradead.org, david@fromorbit.com, amir73il@gmail.com, gregkh@linuxfoundation.org, kernel-team@lge.com, linux-mm@kvack.org, akpm@linux-foundation.org, mhocko@kernel.org, minchan@kernel.org, hannes@cmpxchg.org, vdavydov.dev@gmail.com, sj@kernel.org, jglisse@redhat.com, dennis@kernel.org, cl@linux.com, penberg@kernel.org, rientjes@google.com, vbabka@suse.cz, ngupta@vflare.org, linux-block@vger.kernel.org, josef@toxicpanda.com, linux-fsdevel@vger.kernel.org, jack@suse.cz, jlayton@kernel.org, dan.j.williams@intel.com, hch@infradead.org, djwong@kernel.org, dri-devel@lists.freedesktop.org, rodrigosiqueiramelo@gmail.com, melissa.srw@gmail.com, hamohammed.sa@gmail.com, harry.yoo@oracle.com, chris.p.wilson@intel.com, gwan-gyeong.mun@intel.com, max.byungchul.park@gmail.com, boqun.feng@gmail.com, longman@redhat.com, yunseong.kim@ericsson.com, ysk@kzalloc.com, yeoreum.yun@arm.com, netdev@vger.kernel.org, matthew.brost@intel.com, her0gyugyu@gmail.com, corbet@lwn.net, catalin.marinas@arm.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, luto@kernel.org, sumit.semwal@linaro.org, gustavo@padovan.org, christian.koenig@amd.com, andi.shyti@kernel.org, arnd@arndb.de, lorenzo.stoakes@oracle.com, Liam.Howlett@oracle.com, rppt@kernel.org, surenb@google.com, mcgrof@kernel.org, petr.pavlu@suse.com, da.gomez@kernel.org, samitolvanen@google.com, paulmck@kernel.org, frederic@kernel.org, neeraj.upadhyay@kernel.org, joelagnelf@nvidia.com, josh@joshtriplett.org, urezki@gmail.com, mathieu.desnoyers@efficios.com, jiangshanlai@gmail.com, qiang.zhang@linux.dev, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, bsegall@google.com, mgorman@suse.de, vschneid@redhat.com, chuck.lever@oracle.com, neil@brown.name, okorniev@redhat.com, Dai.Ngo@oracle.com, tom@talpey.com, trondmy@kernel.org, anna@kernel.org, kees@kernel.org, bigeasy@linutronix.de, clrkwllms@kernel.org, mark.rutland@arm.com, ada.coupriediaz@arm.com, kristina.martsenko@arm.com, wangkefeng.wang@huawei.com, broonie@kernel.org, kevin.brodsky@arm.com, dwmw@amazon.co.uk, shakeel.butt@linux.dev, ast@kernel.org, ziy@nvidia.com, yuzhao@google.com, baolin.wang@linux.alibaba.com, usamaarif642@gmail.com, joel.granados@kernel.org, richard.weiyang@gmail.com, geert+renesas@glider.be, tim.c.chen@linux.intel.com, linux@treblig.org, alexander.shishkin@linux.intel.com, lillian@star-ark.net, chenhuacai@kernel.org, francesco@valla.it, guoweikang.kernel@gmail.com, link@vivo.com, jpoimboe@kernel.org, masahiroy@kernel.org, brauner@kernel.org, thomas.weissschuh@linutronix.de, oleg@redhat.com, mjguzik@gmail.com, andrii@kernel.org, wangfushuai@baidu.com, linux-doc@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-media@vger.kernel.org, linaro-mm-sig@lists.linaro.org, linux-i2c@vger.kernel.org, linux-arch@vger.kernel.org, linux-modules@vger.kernel.org, rcu@vger.kernel.org, linux-nfs@vger.kernel.org, linux-rt-devel@lists.linux.dev Subject: [PATCH v17 09/47] arm64, dept: add support CONFIG_ARCH_HAS_DEPT_SUPPORT to arm64 Date: Thu, 2 Oct 2025 17:12:09 +0900 Message-Id: <20251002081247.51255-10-byungchul@sk.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20251002081247.51255-1-byungchul@sk.com> References: <20251002081247.51255-1-byungchul@sk.com> X-Brightmail-Tracker: H4sIAAAAAAAAAzXSbUxTZxQHcJ/72laqN9W46/tSQ4z4MjGdOSY6F2OyJ4vTReMHZ6I2cLUN ULQowrJlVQEZbpE0KUYq0MJSm1Id3hKVag2ChWGjtKEKgxXsZJ0ESrMGMAjYtRi//fI//3M+ HQmp6KdXSLS6s4Jep85VMjJKFk2zbparBjVbXZ3roFy8TsPQZDmCtzNmEkpbEhTMGTtYmJge YCHh6UBQFTCS4Gy+QMBoexyBKTzMwLWRCxTEbL8gqI6YWRjxfgWJ0L8E9E6NIbANvydguPUy grmqHKirdzEw86ybhGsmPwJrOETCm6bksLljEIHHfpGBnuFFEJyMMdBlusJANHCDgPEmBiwX PTRcavidgaoakYKWV24WAqOzBDSK38CQLUKBr7KeANOtBwRM2xws2AzpYH7WQ8Pf9moWZsOZ ELpqouB2tJuGrsGXNIxGjAwMdZbRcM/wigXxTy+CiWCYgHL3JAXi62TF078RrGW/UfDQ00VB +dwEgh73DQYGnQkaDOa3NPhbffSX2djhuktgZ60T4Zl3RoRLK5NqH4uR2DNlofDTeh63VIdY XPKon8UW8Rx22TNww8MRAlvjkzQWHT8zWIwbWWydeUN+m/GdbGe2kKstFPSffXFCpil7fpM8 7VYUea+M0waUWFSBpBKeU/G+jjr6o/3eF/NmuPV8X980mfJS7lPe9WtkPic53yr+ZWBTyku4 I7ylt5tNmeLS+YmrMSJlObedf94eJD7cXMs3NrXO35Em856wj0pZwX3Ol8ZKkh1ZsmOW8i7D ffbDwnL+sb2PqkRyC1rgQAqtrjBPrc1VbdEU67RFW7Ly80SU/Djbj7NH76O4/1Ab4iRImSb3 p4c0ClpdWFCc14Z4CalcKj9h/0ujkGeri78X9PnH9edyhYI2tFJCKT+Rb5s6n63gTqnPCjmC cFrQf5wSEukKA1p217KjQnIoZ1/+vsTC1dFdG4N75+4Ew48GOjuNUd2GP8YHTgpZGxY7PKea G2uLBw7SGeZ7x97/U6ssxWmXb++MZN766b+KJyU18sNbl1lVbmlDVV7hmu171nyte1rnP0mE dnfdWe60vdvvrVEtYIpKxnqXHPjh6Jm4eSiwPwubbduUVIFGnZlB6gvU/wN4eVhLbQMAAA== X-Brightmail-Tracker: H4sIAAAAAAAAAzWSa0hTcRjG+5/rHK4OS+p0gWIg0U0rKl5MoojwkFT2oSwJ8pCHNryylWUQ aLqU1mUNpuW0puISt8xcVkss0RzUMl2W3ZxzskxRG9SmmZe1FX15+b3P8/LwfHhFuPQRuVyk yDotKLP4DBklJsQHdhRujNw6IN/kdMZDX0EbAQF/CQEV9y0UlDTdIqGnwYzAHShBMDVjwEFt CxIwp7PT4J/+QkOw1Y6g1KnDwfKwAIOfjfMUjHX8QKD3eCkoGy0gwGe6gqB82EDDaGcCTLhb SAi6vmHwYXIcgck7j4G3rRjBXGk63Km2UjDT1Y1Dmb4HQZXHhcNIY8h8aB9A0Fp3kYKv2mYc er0L4V3AR8FLvYaCCWcFBt8bKTBebCWh0qBDUFhzn4LSyiYCbINPaXCOzWLQX6rDwNy0H9ym YQIc2mos1C909WApGMoKsdAYwUB/rwWDaVM9Da9r+gkw5UeDoauXhKG6chpmPZshaMwGu/kb Da7regIaJrrJXXrETamvEVy99RHGqd/OUZzltgVxM791iPPXFuKcWhtaO8Z9OFdkPcvVOsYp 7nfgPcW1ThoJ7lU1y93o2sjZyl00V/TsM50UlyKOTxMyFLmCMnZnqlh+6c1dPOep9Fyn5juZ j4ILL6MIEctsZXs635Nhppg17MeP03iYo5jVrPXq8F8dZxwr2T7nhjAvZo6xxg/ddJgJJpr1 X/dhYZYw29k3He+wf5mrWHNj29+ciJDe63EQYZYy21i1rwjTIrERLahHUYqs3ExekbEtRpUu z8tSnIs5mZ3ZhELfZLowe+MJ8vcmtCNGhGSREme0Sy4l+VxVXmY7YkW4LEqSWtcvl0rS+Lzz gjL7hPJMhqBqRytEhGypZF+ykCplTvGnhXRByBGU/11MFLE8H1XHP/5xaTrtS0rC0bhjY4mj OQNWR17S8b2Et2L9nqOJh7GzaGTDfGX9p1jvQa1Fk/LrfPMi0ZZAM286kmiLrJpNWuUZinuh ObnJ9/xrjX+Snhp6bI6y7WlJXsv33TzkLR7/uWTlbvv2B37NMtu64gsRybGDn3piqlxu42CJ 29swIyNUcn7zOlyp4v8Aa9MXtkkDAAA= X-CFilter-Loop: Reflected Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" dept needs to notice every entrance from user to kernel mode to treat every kernel context independently when tracking wait-event dependencies. Roughly, system call and user oriented fault are the cases. Make dept aware of the entrances of arm64 and add support CONFIG_ARCH_HAS_DEPT_SUPPORT to arm64. Signed-off-by: Byungchul Park --- arch/arm64/Kconfig | 1 + arch/arm64/kernel/syscall.c | 7 +++++++ arch/arm64/mm/fault.c | 7 +++++++ 3 files changed, 15 insertions(+) diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index e9bbfacc35a6..a8fab2c052dc 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -281,6 +281,7 @@ config ARM64 select USER_STACKTRACE_SUPPORT select VDSO_GETRANDOM select VMAP_STACK + select ARCH_HAS_DEPT_SUPPORT help ARM 64-bit (AArch64) Linux support. =20 diff --git a/arch/arm64/kernel/syscall.c b/arch/arm64/kernel/syscall.c index c442fcec6b9e..bbd306335179 100644 --- a/arch/arm64/kernel/syscall.c +++ b/arch/arm64/kernel/syscall.c @@ -7,6 +7,7 @@ #include #include #include +#include =20 #include #include @@ -96,6 +97,12 @@ static void el0_svc_common(struct pt_regs *regs, int scn= o, int sc_nr, * (Similarly for HVC and SMC elsewhere.) */ =20 + /* + * This is a system call from user mode. Make dept work with a + * new kernel mode context. + */ + dept_update_cxt(); + if (flags & _TIF_MTE_ASYNC_FAULT) { /* * Process the asynchronous tag check fault before the actual diff --git a/arch/arm64/mm/fault.c b/arch/arm64/mm/fault.c index d816ff44faff..96827b999d18 100644 --- a/arch/arm64/mm/fault.c +++ b/arch/arm64/mm/fault.c @@ -26,6 +26,7 @@ #include #include #include +#include =20 #include #include @@ -622,6 +623,12 @@ static int __kprobes do_page_fault(unsigned long far, = unsigned long esr, if (!(mm_flags & FAULT_FLAG_USER)) goto lock_mmap; =20 + /* + * This fault comes from user mode. Make dept work with a new + * kernel mode context. + */ + dept_update_cxt(); + vma =3D lock_vma_under_rcu(mm, addr); if (!vma) goto lock_mmap; --=20 2.17.1