From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id E3ED143802E; Mon, 13 Jul 2026 13:59:37 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.140.110.172 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783951179; cv=none; b=JsBE6v4iJKd+PAjF4EghSXWKIXyIYkTuVuob3WxOCQBFqckNCaXPmYz5AbwBJvsWNQNcWte4Auj3aot+ABMGp3Z7qnkyjRBa7H/76653H03OLIfK+VIOqinG4RLyy5DKz6jOzaWg1y02r0kAgXTG/fyH9oa/p70c6gOqQtlg3PI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783951179; c=relaxed/simple; bh=gV2pTsCUztgOvGxrgAt605ARjz7dmzmHzQM9Otey+5U=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=iH9HteEZJEZKSCxe8cfmMFdxxpUGIkCEQk3GPDmgM4w+3+WyP3x2Htr7qWadmfMVMrUc2lNheQ7fmb92Xu7APqOVdbych+4aFCN0XtyayWHK8RYclX1rnO+UUzLmm0mg3A51CzcitPJ+6JYREMr5xl6lwKSlA5nMntXhJGDLEJk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com; spf=pass smtp.mailfrom=arm.com; dkim=pass (1024-bit key) header.d=arm.com header.i=@arm.com header.b=hFiwKMoL; arc=none smtp.client-ip=217.140.110.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=arm.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=arm.com header.i=@arm.com header.b="hFiwKMoL" Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 1F7D41DB5; Mon, 13 Jul 2026 06:59:33 -0700 (PDT) Received: from e129823.cambridge.arm.com (e129823.arm.com [10.2.213.3]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 2DF8B3F7B4; Mon, 13 Jul 2026 06:59:25 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=arm.com; s=foss; t=1783951177; bh=gV2pTsCUztgOvGxrgAt605ARjz7dmzmHzQM9Otey+5U=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=hFiwKMoLlCD3BN8OR1BVTk7TGKyMljN5sZjMGiN8FhmafTvDOgG4tq4iifBz0LBGe TEPym80+aPKYKhJUwzOJNb9VKhhRTPH621Ljc/q0DnJmnSnhinhKUbtdb6iKpO4mVN n11BCRxPznqUlnDr4I57hyRYBDnCMWFwyszMYrfQ= From: Yeoreum Yun To: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, loongarch@lists.linux.dev, linux-mips@vger.kernel.org, linux-arch@vger.kernel.org, kvm-riscv@lists.infradead.org, linux-riscv@lists.infradead.org, x86@kernel.org, linux-mm@kvack.org, kasan-dev@googlegroups.com, linux-csky@vger.kernel.org, linux-m68k@lists.linux-m68k.org, linux-openrisc@vger.kernel.org Cc: david@kernel.org, linux@armlinux.org.uk, akpm@linux-foundation.org, ankur.a.arora@oracle.com, rppt@kernel.org, linmag7@gmail.com, chleroy@kernel.org, klarasmodin@gmail.com, chenhuacai@kernel.org, kernel@xen0n.name, kas@kernel.org, zhangtianyang@loongson.cn, wangyuli@aosc.io, tsbogend@alpha.franken.de, ljs@kernel.org, jgg@ziepe.ca, catalin.marinas@arm.com, will@kernel.org, arnd@arndb.de, ryan.roberts@arm.com, pasha.tatashin@soleen.com, rmclure@linux.ibm.com, baolin.wang@linux.alibaba.com, tj@kernel.org, kevin.brodsky@arm.com, anup@brainfault.org, atish.patra@linux.dev, pjw@kernel.org, palmer@dabbelt.com, aou@eecs.berkeley.edu, alex@ghiti.fr, dave.hansen@linux.intel.com, luto@kernel.org, peterz@infradead.org, tglx@kernel.org, mingo@redhat.com, bp@alien8.de, hpa@zytor.com, hannes@cmpxchg.org, mhocko@kernel.org, qi.zheng@linux.dev, shakeel.butt@linux.dev, kasong@tencent.com, baohua@kernel.org, axelrasmussen@google.com, yuanchu@google.com, weixugc@google.com, ryabinin.a.a@gmail.com, glider@google.com, andreyknvl@gmail.com, dvyukov@google.com, vincenzo.frascino@arm.com, anshuman.khandual@arm.com, yang@os.amperecomputing.com, chaitanyas.prakash@arm.com, ardb@kernel.org, guoren@kernel.org, yang.li85200@gmail.com, viro@zeniv.linux.org.uk, dinguyen@kernel.org, schuster.simon@siemens-energy.com, wangruikang@iscas.ac.cn, junhui.liu@pigmoral.tech, muchun.song@linux.dev, vishal.moola@gmail.com, namcao@linutronix.de, pavel@kernel.org, djbw@kernel.org, yu-cheng.yu@intel.com, baolu.lu@linux.intel.com, Jonathan.Cameron@huawei.com, coxu@redhat.com, andreas@gaisler.com, liam@infradead.org, vbabka@kernel.org, surenb@google.com, mhocko@suse.com, geert@linux-m68k.org, shorne@gmail.com, jonas@southpole.se, stefan.kristiansson@saunalahti.fi, Yeoreum Yun Subject: [RFC PATCH 15/34] mips: mm: use proper set_pXd() for generic compile-time folded patable in vmalloc_fault path Date: Mon, 13 Jul 2026 14:55:54 +0100 Message-ID: <20260713135614.1618183-16-yeoreum.yun@arm.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260713135614.1618183-1-yeoreum.yun@arm.com> References: <20260713135614.1618183-1-yeoreum.yun@arm.com> Precedence: bulk X-Mailing-List: linux-arch@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit We want to rework how set_pXd() behaves for generic comiple-time folded page tables by disallowing its use and triggering a compile-time error when it is used improperly, ensuring that the actual first-level set_pXd() function is used instead. Therefore, call the proper set_pXd() in case of generic compile-time folded pgtable to handle vmalloc_fault case with pXd_present() and drop pgd_present() and set_pgd() usage since mips doesn't support 5 page-table levels. There should be no functional change. Signed-off-by: Yeoreum Yun --- arch/mips/mm/fault.c | 13 ++++++++----- 1 file changed, 8 insertions(+), 5 deletions(-) diff --git a/arch/mips/mm/fault.c b/arch/mips/mm/fault.c index 37fedeaca2e9a..4ad281a3bf97a 100644 --- a/arch/mips/mm/fault.c +++ b/arch/mips/mm/fault.c @@ -289,28 +289,31 @@ static void __do_page_fault(struct pt_regs *regs, unsigned long write, pmd_t *pmd, *pmd_k; pte_t *pte_k; + BUILD_BUG_ON(CONFIG_PGTABLE_LEVELS > 4); + pgd = (pgd_t *) pgd_current[raw_smp_processor_id()] + offset; pgd_k = init_mm.pgd + offset; - if (!pgd_present(*pgd_k)) - goto no_context; - set_pgd(pgd, *pgd_k); - p4d = p4d_offset(pgd, address); p4d_k = p4d_offset(pgd_k, address); if (!p4d_present(*p4d_k)) goto no_context; + if (CONFIG_PGTABLE_LEVELS == 4) + set_p4d(p4d, *p4d_k); pud = pud_offset(p4d, address); pud_k = pud_offset(p4d_k, address); if (!pud_present(*pud_k)) goto no_context; + if (CONFIG_PGTABLE_LEVELS == 3) + set_pud(pud, *pud_k); pmd = pmd_offset(pud, address); pmd_k = pmd_offset(pud_k, address); if (!pmd_present(*pmd_k)) goto no_context; - set_pmd(pmd, *pmd_k); + if (CONFIG_PGTABLE_LEVELS == 2) + set_pmd(pmd, *pmd_k); pte_k = pte_offset_kernel(pmd_k, address); if (!pte_present(*pte_k)) -- LEVI:{C3F47F37-75D8-414A-A8BA-3980EC8A46D7}