From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 67BB8D5B17C for ; Mon, 15 Dec 2025 15:04:37 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id CDFC66B002B; Mon, 15 Dec 2025 10:04:36 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id C8F796B002D; Mon, 15 Dec 2025 10:04:36 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id B7EC16B002E; Mon, 15 Dec 2025 10:04:36 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0017.hostedemail.com [216.40.44.17]) by kanga.kvack.org (Postfix) with ESMTP id A10776B002B for ; Mon, 15 Dec 2025 10:04:36 -0500 (EST) Received: from smtpin28.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay01.hostedemail.com (Postfix) with ESMTP id 7332A12F92 for ; Mon, 15 Dec 2025 15:04:36 +0000 (UTC) X-FDA: 84222026952.28.F35A555 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by imf21.hostedemail.com (Postfix) with ESMTP id AE3591C000E for ; Mon, 15 Dec 2025 15:04:34 +0000 (UTC) Authentication-Results: imf21.hostedemail.com; dkim=none; spf=pass (imf21.hostedemail.com: domain of kevin.brodsky@arm.com designates 217.140.110.172 as permitted sender) smtp.mailfrom=kevin.brodsky@arm.com; dmarc=pass (policy=none) header.from=arm.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1765811075; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=DVndtn13GZjkQXq4nJ2Yz56uyt5Z2O0y34NnRlu1iqc=; b=Ucd21mWKOWWEL/vs+ygnW6iCEohrqURKRiEfh1gIr9dm6oZ6TMFrmg8+xI1KufhQR/uGyY Dtfpll86dSkWsaJYVP1CjPgka4KIbsX67ih5UvmWveCg+RpZxnSIYBX+VMQhbUunHteMPr SKyAqBNrc9OhQHThLP3KzauZf68ZINU= ARC-Authentication-Results: i=1; imf21.hostedemail.com; dkim=none; spf=pass (imf21.hostedemail.com: domain of kevin.brodsky@arm.com designates 217.140.110.172 as permitted sender) smtp.mailfrom=kevin.brodsky@arm.com; dmarc=pass (policy=none) header.from=arm.com ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1765811075; a=rsa-sha256; cv=none; b=cNfMM+Dw18H13R/jWb6Ol96/Eio+PMawCwzdE/zocJCoZonjSJrp9jHcNjxLa6l1sdtQzH DTlGk6Wkm9KYgRg2h/PF1H3E6tRSG15fPHiUng4GP8fXByPa56sDMKFbpbvSsTSCQ+FT3a WwY4ccQYdGnSwEhsnfHuwmltKvJ5h3k= 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 BB8BF169E; Mon, 15 Dec 2025 07:04:26 -0800 (PST) Received: from e123572-lin.arm.com (e123572-lin.cambridge.arm.com [10.1.194.54]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 7E8EC3F73B; Mon, 15 Dec 2025 07:04:28 -0800 (PST) From: Kevin Brodsky To: linux-mm@kvack.org Cc: linux-kernel@vger.kernel.org, Kevin Brodsky , Alexander Gordeev , Andreas Larsson , Andrew Morton , Anshuman Khandual , Boris Ostrovsky , Borislav Petkov , Catalin Marinas , Christophe Leroy , Dave Hansen , David Hildenbrand , "David S. Miller" , David Woodhouse , "H. Peter Anvin" , Ingo Molnar , Jann Horn , Juergen Gross , "Liam R. Howlett" , Lorenzo Stoakes , Madhavan Srinivasan , Michael Ellerman , Michal Hocko , Mike Rapoport , Nicholas Piggin , Peter Zijlstra , "Ritesh Harjani (IBM)" , Ryan Roberts , Suren Baghdasaryan , Thomas Gleixner , Venkat Rao Bagalkote , Vlastimil Babka , Will Deacon , Yeoreum Yun , linux-arm-kernel@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, sparclinux@vger.kernel.org, xen-devel@lists.xenproject.org, x86@kernel.org, "David Hildenbrand (Red Hat)" Subject: [PATCH v6 10/14] arm64: mm: replace TIF_LAZY_MMU with is_lazy_mmu_mode_active() Date: Mon, 15 Dec 2025 15:03:19 +0000 Message-ID: <20251215150323.2218608-11-kevin.brodsky@arm.com> X-Mailer: git-send-email 2.51.2 In-Reply-To: <20251215150323.2218608-1-kevin.brodsky@arm.com> References: <20251215150323.2218608-1-kevin.brodsky@arm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Stat-Signature: inwfcxfs7hwqad4wu1wacg6b9fbchh9b X-Rspam-User: X-Rspamd-Server: rspam07 X-Rspamd-Queue-Id: AE3591C000E X-HE-Tag: 1765811074-451594 X-HE-Meta: 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 XI4M308P w1niSj4mx5lX2ko4zI9eGyA78Ds03wrbrphwB4D1XyGVnYwd+2v4LFO17xudm9k5YjqVQTg9gxQG7J0Z38RFP9SM6HGSdX+6J7O09Rx7xgX60XCHN7kjyElzcDguDogQnY66YA2yhXNKHA1IYSfKJSVGK7c/iOzG1p3UQfCIw9GMJy5ZzdOW1Mm3qs27d4MxwfuQoLo9+8WP124B5vAZGs9K/YfG6yez2UXVFGnqqeJguJQV1ABIj1bq7H1JgoISuVZke+PfxgpygUPeXFR51O2NdG+PLPF1wd5Mxuz+8+f4lO6Jn4f1UNcR6u1Wf1RuVgORSb+8Ou7WHJtg= 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: List-Subscribe: List-Unsubscribe: The generic lazy_mmu layer now tracks whether a task is in lazy MMU mode. As a result we no longer need a TIF flag for that purpose - let's use the new is_lazy_mmu_mode_active() helper instead. The explicit check for in_interrupt() is no longer necessary either as is_lazy_mmu_mode_active() always returns false in interrupt context. Acked-by: David Hildenbrand (Red Hat) Reviewed-by: Anshuman Khandual Signed-off-by: Kevin Brodsky --- arch/arm64/include/asm/pgtable.h | 19 +++---------------- arch/arm64/include/asm/thread_info.h | 3 +-- 2 files changed, 4 insertions(+), 18 deletions(-) diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h index 7f528c36d53c..445e18e92221 100644 --- a/arch/arm64/include/asm/pgtable.h +++ b/arch/arm64/include/asm/pgtable.h @@ -62,28 +62,16 @@ static inline void emit_pte_barriers(void) static inline void queue_pte_barriers(void) { - unsigned long flags; - - if (in_interrupt()) { - emit_pte_barriers(); - return; - } - - flags = read_thread_flags(); - - if (flags & BIT(TIF_LAZY_MMU)) { + if (is_lazy_mmu_mode_active()) { /* Avoid the atomic op if already set. */ - if (!(flags & BIT(TIF_LAZY_MMU_PENDING))) + if (!test_thread_flag(TIF_LAZY_MMU_PENDING)) set_thread_flag(TIF_LAZY_MMU_PENDING); } else { emit_pte_barriers(); } } -static inline void arch_enter_lazy_mmu_mode(void) -{ - set_thread_flag(TIF_LAZY_MMU); -} +static inline void arch_enter_lazy_mmu_mode(void) {} static inline void arch_flush_lazy_mmu_mode(void) { @@ -94,7 +82,6 @@ static inline void arch_flush_lazy_mmu_mode(void) static inline void arch_leave_lazy_mmu_mode(void) { arch_flush_lazy_mmu_mode(); - clear_thread_flag(TIF_LAZY_MMU); } #ifdef CONFIG_TRANSPARENT_HUGEPAGE diff --git a/arch/arm64/include/asm/thread_info.h b/arch/arm64/include/asm/thread_info.h index a803b887b0b4..e7cd017b07c8 100644 --- a/arch/arm64/include/asm/thread_info.h +++ b/arch/arm64/include/asm/thread_info.h @@ -84,8 +84,7 @@ void arch_setup_new_exec(void); #define TIF_SME_VL_INHERIT 28 /* Inherit SME vl_onexec across exec */ #define TIF_KERNEL_FPSTATE 29 /* Task is in a kernel mode FPSIMD section */ #define TIF_TSC_SIGSEGV 30 /* SIGSEGV on counter-timer access */ -#define TIF_LAZY_MMU 31 /* Task in lazy mmu mode */ -#define TIF_LAZY_MMU_PENDING 32 /* Ops pending for lazy mmu mode exit */ +#define TIF_LAZY_MMU_PENDING 31 /* Ops pending for lazy mmu mode exit */ #define _TIF_SIGPENDING (1 << TIF_SIGPENDING) #define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED) -- 2.51.2