From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from invmail4.hynix.com (exvmail4.skhynix.com [166.125.252.92]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 90E2F2E9721; Thu, 2 Oct 2025 08:13:24 +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=1759392808; cv=none; b=G68/PWyo8buSGyE9ihSZyJpX5l8bBUXdy7wxH7PnyUuZfULd1FPe6f3IKisvABtp1oXo/Q8GEwJBdotPl12AzfXj36RdKi1HPubGoWhRVA7dUk5oGEU0KMynamN9dNG401V1OfceJtJYRcZ6hlpHXcUQh9h0uP6S79RfPt+/oNI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1759392808; c=relaxed/simple; bh=qC+IR5GZA2zhKidsaNPgh+s2SNwZBlAHaPQiuaDTpZM=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References; b=jI1p/81X6xXIbu6ZiTr9MO1I33beN7FmstrSdP7hHLYe1E0KdXyOIid+esGFrhmlgLPYMM9gfymXiA5tLHHdoY2uLoL6wWB4H/L//K/IpKGU2pWBt1vzgD0Qvp3hp52v0x9KzBBzjeb3G7Si7Bn5XNIJGcYLGSPavyEy4PzRBtc= 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-c2dff70000001609-16-68de340c3f0a 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 08/47] x86_64, dept: add support CONFIG_ARCH_HAS_DEPT_SUPPORT to x86_64 Date: Thu, 2 Oct 2025 17:12:08 +0900 Message-Id: <20251002081247.51255-9-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: H4sIAAAAAAAAAzWSWUwTaxTH/Wa+mSkN1bGiDO5pJMZ9CZgTc2OuvjiaGDU+uCZaZbRVKFoW QUNShHqJCGIVjYBSVBBsldKqYatW1CpWpAVEUAsWFaLCJUEoikgtGN9+J//l5CRHREpbqaki pSpWUKvkkTJajMU9gQWLJGFtiqV3hqZAc7INw0B/Goa8UiMNaeZLFDhvGxBoK3wYfunsDPT/ eMuAz2pHcMGlI8F4J5mAb6YRGr4+6kPw+cla6GmvosDn7iLgtbcbQdHHEQI+2v5DkH/VQkOB x02CtfgEDZ+y7pLQNNBLQ212Og09rjwC/jfRoD9hpeByrg5ByrVSGi5cNmOoeF/JgOvrMAEG 8wZoL+rEcPGzXysLhuxbVQQUaUIht67Rv1cfDXZDFwPuM9kYbvfUU1Db1kxB+9OTFJhbnyDo b/IQkFY5gMH6ZgEUnLyOodpai8Fe3kFAm9FHgSZ30H+2zUFBg8GJobSrhQCH/RmG+spbFBS+ dhFgqXtBgjdzGjjPZlD/RvCD2kzM37TcI3htwy+aN14xIv7nkA7x/YUpJK/N8o+PuntJPtVy lC90dNP80MArmrd69Zg/W7eIr8hxM3zq/TcMrzfHbVq+Q/xPhBCpjBfUS1btESuumm8whx8H JXyxlzMa1MGeQgEijg3jLl0Zwn85fVhDjzLNzuVaWn6QoxzEzuYsGZ3UKJOsYzrX7Fo4ypPY ndy36pdjWcyGchWVDWMsYcO57w+c1J/OWZzBZBvrCWBXcI0ex5hH6vdoe1OJU0js9+QHcLVN FuZPIIR7WNyCs5BEj8bdRFKlKj5KrowMW6xIVCkTFu+LjjIj/8MVJQ3vLEd9zi01iBUhWaDE GepWSCl5fExiVA3iRKQsSLKn+J1CKomQJx4T1NG71XGRQkwNmibCsmDJcu/RCCl7QB4rHBKE w4L6r0qIAqZq0Lyc5Mwz+47vKjzi1Xt+zjlHJOWUbCp78XJy9YjPun6C60Ps+5KZx7aXNKTY sjsaraKwcPpL/baQZ6Hh+v3uI891e7eXnV6Dq1qfBxMe07ym9Rnc+PS+pM2ob2L3upCDtvyN mZCgOZ+WsULVNjj58dbrxwM7V5viZpxfycGN6cqLE2Q4RiFfNp9Ux8h/A7lLWjJsAwAA X-Brightmail-Tracker: H4sIAAAAAAAAAzWSa0hTYRjHe895zznbaHFYVocMipEE3S9WD93wm6eiCPoQFKQrD214ZauV SeVtJV1ttVmui2kuc2a2WbnSMs1FmeZarSinKba0tFE6zabZZvTl4ffw//Hn+fCISNk9arpI lbRXUCcpEuS0BEs2r85aMDGyTbm4YWgeuDNqMfgHcjBcul1GQ471IgUt5RYE7f4cBEMBEwk6 +xiGUb2DgYHhjwyM1TgQGJ16EsoqMwjor/hDw7f6nwgMHV005PVkYPCZTyLI95oY6GmIhr72 hxSMeb4Q8G6wF4G56w8BXbXHEIwa4+FqoY2GQNMrEvIMLQiudXhI6K4IhpWONgQ1JZk0fM69 S4KraxK88ftoeG44QUOf8xIB3ytoKMisoeCySY8gq+g2DcbLVgz2Tw8YcH4bIaDVqCfAYt0E 7WYvhsbcQiJ4X9C6Mw1MeVlEcHQTYLj1kIBhcykDL4taMZjTI8DU5KKgsySfgZGOJTBWkAwO yxcGPGcMGMr7XlFRBsQP6U5jvtR2j+B1r0dpvuxKGeIDv/WIHyjOInldbnCt7/WRfLZtP1/c 2Evzv/1vab5msADzLwo5/mzTAt6e72H47EcfmC2rtkvWxAkJKq2gXrQuVqIstN5gUp6GHfjq qGLSUSd7HIlFHBvJnRhJp0NMs3O49++HyRCHsbM42ykvFWKSbZzBuZ3zQzyZ3cH1VzfjEGM2 grM/eD3OUnY59+txC/WvcyZnqagd7xGzKzhXR+O4Iws6Ol82kYskBWhCKQpTJWkTFaqE5Qs1 8crUJNWBhbuTE60o+E3mQyNnq9CAK7oOsSIknyh1RniUMkqh1aQm1iFORMrDpLElrUqZNE6R elBQJ8eo9yUImjoULsLyadIN24RYGbtHsVeIF4QUQf0/JUTi6enI/Wv0CTHXH1OqXfy9s/pp 1K7oVqUnZspSY3hzQCI6tPaILPBj1dBbZ2LxvGWDVc3nPrlmn5dlp7hPp02t9L7sv45jIvPP uW1pV2v7qm/uzFk/Y1nlUUvy9fC19psrceYFMfG1/lnbfX98WoqkYatFWyTuvvJu80Zfb9xh r2aN82iUHGuUiiVzSbVG8Rd7PnfISQMAAA== X-CFilter-Loop: Reflected Precedence: bulk X-Mailing-List: linux-doc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: 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 x86_64 and add support CONFIG_ARCH_HAS_DEPT_SUPPORT to x86_64. Signed-off-by: Byungchul Park --- arch/x86/Kconfig | 1 + arch/x86/entry/syscall_64.c | 7 +++++++ arch/x86/mm/fault.c | 7 +++++++ 3 files changed, 15 insertions(+) diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 05880301212e..46021cf5934b 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -38,6 +38,7 @@ config X86_64 select ZONE_DMA32 select EXECMEM if DYNAMIC_FTRACE select ACPI_MRRM if ACPI + select ARCH_HAS_DEPT_SUPPORT config FORCE_DYNAMIC_FTRACE def_bool y diff --git a/arch/x86/entry/syscall_64.c b/arch/x86/entry/syscall_64.c index b6e68ea98b83..66bd5af5aff1 100644 --- a/arch/x86/entry/syscall_64.c +++ b/arch/x86/entry/syscall_64.c @@ -8,6 +8,7 @@ #include #include #include +#include #define __SYSCALL(nr, sym) extern long __x64_##sym(const struct pt_regs *); #define __SYSCALL_NORETURN(nr, sym) extern long __noreturn __x64_##sym(const struct pt_regs *); @@ -86,6 +87,12 @@ static __always_inline bool do_syscall_x32(struct pt_regs *regs, int nr) /* Returns true to return using SYSRET, or false to use IRET */ __visible noinstr bool do_syscall_64(struct pt_regs *regs, int nr) { + /* + * This is a system call from user mode. Make dept work with a + * new kernel mode context. + */ + dept_update_cxt(); + add_random_kstack_offset(); nr = syscall_enter_from_user_mode(regs, nr); diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c index 998bd807fc7b..017edb75f0a0 100644 --- a/arch/x86/mm/fault.c +++ b/arch/x86/mm/fault.c @@ -19,6 +19,7 @@ #include #include /* find_and_lock_vma() */ #include +#include #include /* boot_cpu_has, ... */ #include /* dotraplinkage, ... */ @@ -1219,6 +1220,12 @@ void do_user_addr_fault(struct pt_regs *regs, tsk = current; mm = tsk->mm; + /* + * This fault comes from user mode. Make dept work with a new + * kernel mode context. + */ + dept_update_cxt(); + if (unlikely((error_code & (X86_PF_USER | X86_PF_INSTR)) == X86_PF_INSTR)) { /* * Whoops, this is kernel mode code trying to execute from -- 2.17.1