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 lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id DEDB1C4829E for ; Thu, 15 Feb 2024 11:25:18 +0000 (UTC) Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4TbCR14VChz3vd6 for ; Thu, 15 Feb 2024 22:25:17 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=arm.com (client-ip=217.140.110.172; helo=foss.arm.com; envelope-from=mark.rutland@arm.com; receiver=lists.ozlabs.org) Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by lists.ozlabs.org (Postfix) with ESMTP id 4TbCQZ1yH2z2yNf for ; Thu, 15 Feb 2024 22:24:53 +1100 (AEDT) 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 6E6AEDA7; Thu, 15 Feb 2024 03:25:03 -0800 (PST) Received: from FVFF77S0Q05N (unknown [10.57.68.11]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id E7DF33F7B4; Thu, 15 Feb 2024 03:24:18 -0800 (PST) Date: Thu, 15 Feb 2024 11:24:16 +0000 From: Mark Rutland To: Ryan Roberts Subject: Re: [PATCH v6 11/18] arm64/mm: Split __flush_tlb_range() to elide trailing DSB Message-ID: References: <20240215103205.2607016-1-ryan.roberts@arm.com> <20240215103205.2607016-12-ryan.roberts@arm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20240215103205.2607016-12-ryan.roberts@arm.com> X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Kefeng Wang , x86@kernel.org, David Hildenbrand , Catalin Marinas , Yang Shi , Dave Hansen , linux-mm@kvack.org, Andrey Ryabinin , "H. Peter Anvin" , Will Deacon , Ard Biesheuvel , Marc Zyngier , Alistair Popple , Barry Song <21cnbao@gmail.com>, Matthew Wilcox , Ingo Molnar , Zi Yan , John Hubbard , Borislav Petkov , Thomas Gleixner , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, James Morse , Andrew Morton , linuxppc-dev@lists.ozlabs.org Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" On Thu, Feb 15, 2024 at 10:31:58AM +0000, Ryan Roberts wrote: > Split __flush_tlb_range() into __flush_tlb_range_nosync() + > __flush_tlb_range(), in the same way as the existing flush_tlb_page() > arrangement. This allows calling __flush_tlb_range_nosync() to elide the > trailing DSB. Forthcoming "contpte" code will take advantage of this > when clearing the young bit from a contiguous range of ptes. > > Ordering between dsb and mmu_notifier_arch_invalidate_secondary_tlbs() > has changed, but now aligns with the ordering of __flush_tlb_page(). It > has been discussed that __flush_tlb_page() may be wrong though. > Regardless, both will be resolved separately if needed. > > Reviewed-by: David Hildenbrand > Tested-by: John Hubbard > Signed-off-by: Ryan Roberts Acked-by: Mark Rutland Mark. > --- > arch/arm64/include/asm/tlbflush.h | 13 +++++++++++-- > 1 file changed, 11 insertions(+), 2 deletions(-) > > diff --git a/arch/arm64/include/asm/tlbflush.h b/arch/arm64/include/asm/tlbflush.h > index 1deb5d789c2e..3b0e8248e1a4 100644 > --- a/arch/arm64/include/asm/tlbflush.h > +++ b/arch/arm64/include/asm/tlbflush.h > @@ -422,7 +422,7 @@ do { \ > #define __flush_s2_tlb_range_op(op, start, pages, stride, tlb_level) \ > __flush_tlb_range_op(op, start, pages, stride, 0, tlb_level, false, kvm_lpa2_is_enabled()); > > -static inline void __flush_tlb_range(struct vm_area_struct *vma, > +static inline void __flush_tlb_range_nosync(struct vm_area_struct *vma, > unsigned long start, unsigned long end, > unsigned long stride, bool last_level, > int tlb_level) > @@ -456,10 +456,19 @@ static inline void __flush_tlb_range(struct vm_area_struct *vma, > __flush_tlb_range_op(vae1is, start, pages, stride, asid, > tlb_level, true, lpa2_is_enabled()); > > - dsb(ish); > mmu_notifier_arch_invalidate_secondary_tlbs(vma->vm_mm, start, end); > } > > +static inline void __flush_tlb_range(struct vm_area_struct *vma, > + unsigned long start, unsigned long end, > + unsigned long stride, bool last_level, > + int tlb_level) > +{ > + __flush_tlb_range_nosync(vma, start, end, stride, > + last_level, tlb_level); > + dsb(ish); > +} > + > static inline void flush_tlb_range(struct vm_area_struct *vma, > unsigned long start, unsigned long end) > { > -- > 2.25.1 > 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id D6A35C48BEB for ; Thu, 15 Feb 2024 11:24:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=bnIrsRWblXxPiTIDWnp4nQW+sAQwXVkAt9mCA5t6Frk=; b=uSC47S0MFLxedN ONqMuKtyKBAt8qvtRmwKXFNi5uKRvvvHrKPSl7S+/AumfQTu0uxubKYmdrEw1tOmx5A98cnduzyXu yLrvJdiRTbUuBs7moNFuqaPYoPFHOeSndyUPQPrbggbi+0Ab5JNy5nJ1gifaldzNEKqjQj4Wbsgxp xqQEVarSDEQ77owffQh0KuR/kKrXSWeEFzT62osH3yQBbV43BAWlX1baUnTpqx6BwBd/IYqZ1/At1 nm4y33BTQHel42F5e9r75qNVoc8k9eLuLUxMbbnKXW9QM+WTP55C7TROS6AMk0QjxqGeJ9rgHg1EZ mYyMs8A/+ubJWnIA62WA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1raZqs-0000000G1IV-2Bh4; Thu, 15 Feb 2024 11:24:26 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1raZqp-0000000G1G0-1NB0 for linux-arm-kernel@lists.infradead.org; Thu, 15 Feb 2024 11:24:24 +0000 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 6E6AEDA7; Thu, 15 Feb 2024 03:25:03 -0800 (PST) Received: from FVFF77S0Q05N (unknown [10.57.68.11]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id E7DF33F7B4; Thu, 15 Feb 2024 03:24:18 -0800 (PST) Date: Thu, 15 Feb 2024 11:24:16 +0000 From: Mark Rutland To: Ryan Roberts Cc: Catalin Marinas , Will Deacon , Ard Biesheuvel , Marc Zyngier , James Morse , Andrey Ryabinin , Andrew Morton , Matthew Wilcox , David Hildenbrand , Kefeng Wang , John Hubbard , Zi Yan , Barry Song <21cnbao@gmail.com>, Alistair Popple , Yang Shi , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , "H. Peter Anvin" , linux-arm-kernel@lists.infradead.org, x86@kernel.org, linuxppc-dev@lists.ozlabs.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v6 11/18] arm64/mm: Split __flush_tlb_range() to elide trailing DSB Message-ID: References: <20240215103205.2607016-1-ryan.roberts@arm.com> <20240215103205.2607016-12-ryan.roberts@arm.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20240215103205.2607016-12-ryan.roberts@arm.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240215_032423_490026_2E6E48CF X-CRM114-Status: GOOD ( 20.82 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Thu, Feb 15, 2024 at 10:31:58AM +0000, Ryan Roberts wrote: > Split __flush_tlb_range() into __flush_tlb_range_nosync() + > __flush_tlb_range(), in the same way as the existing flush_tlb_page() > arrangement. This allows calling __flush_tlb_range_nosync() to elide the > trailing DSB. Forthcoming "contpte" code will take advantage of this > when clearing the young bit from a contiguous range of ptes. > > Ordering between dsb and mmu_notifier_arch_invalidate_secondary_tlbs() > has changed, but now aligns with the ordering of __flush_tlb_page(). It > has been discussed that __flush_tlb_page() may be wrong though. > Regardless, both will be resolved separately if needed. > > Reviewed-by: David Hildenbrand > Tested-by: John Hubbard > Signed-off-by: Ryan Roberts Acked-by: Mark Rutland Mark. > --- > arch/arm64/include/asm/tlbflush.h | 13 +++++++++++-- > 1 file changed, 11 insertions(+), 2 deletions(-) > > diff --git a/arch/arm64/include/asm/tlbflush.h b/arch/arm64/include/asm/tlbflush.h > index 1deb5d789c2e..3b0e8248e1a4 100644 > --- a/arch/arm64/include/asm/tlbflush.h > +++ b/arch/arm64/include/asm/tlbflush.h > @@ -422,7 +422,7 @@ do { \ > #define __flush_s2_tlb_range_op(op, start, pages, stride, tlb_level) \ > __flush_tlb_range_op(op, start, pages, stride, 0, tlb_level, false, kvm_lpa2_is_enabled()); > > -static inline void __flush_tlb_range(struct vm_area_struct *vma, > +static inline void __flush_tlb_range_nosync(struct vm_area_struct *vma, > unsigned long start, unsigned long end, > unsigned long stride, bool last_level, > int tlb_level) > @@ -456,10 +456,19 @@ static inline void __flush_tlb_range(struct vm_area_struct *vma, > __flush_tlb_range_op(vae1is, start, pages, stride, asid, > tlb_level, true, lpa2_is_enabled()); > > - dsb(ish); > mmu_notifier_arch_invalidate_secondary_tlbs(vma->vm_mm, start, end); > } > > +static inline void __flush_tlb_range(struct vm_area_struct *vma, > + unsigned long start, unsigned long end, > + unsigned long stride, bool last_level, > + int tlb_level) > +{ > + __flush_tlb_range_nosync(vma, start, end, stride, > + last_level, tlb_level); > + dsb(ish); > +} > + > static inline void flush_tlb_range(struct vm_area_struct *vma, > unsigned long start, unsigned long end) > { > -- > 2.25.1 > _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel 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]) by smtp.lore.kernel.org (Postfix) with ESMTP id AD9ECC4829E for ; Thu, 15 Feb 2024 11:24:25 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 43ECC8D000E; 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Peter Anvin" , linux-arm-kernel@lists.infradead.org, x86@kernel.org, linuxppc-dev@lists.ozlabs.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v6 11/18] arm64/mm: Split __flush_tlb_range() to elide trailing DSB Message-ID: References: <20240215103205.2607016-1-ryan.roberts@arm.com> <20240215103205.2607016-12-ryan.roberts@arm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20240215103205.2607016-12-ryan.roberts@arm.com> X-Rspamd-Queue-Id: 3CCD8140007 X-Rspam-User: X-Rspamd-Server: rspam04 X-Stat-Signature: 5h48fbixxojjdz8d1qyake391p1z6yew X-HE-Tag: 1707996263-789096 X-HE-Meta: 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 fmUFEvBK E5/3t33nGPjMmrgE+qZgDcvvtsI+a3JtK7PJSLRChfRz0fzUWAKtrAYQz0BjT114n4SrV7VpOwW8GDHFNn5I3df8bT8XTHjbcqXZCCdfxcBxJTUQyLsx/pIMdKjewD0waqgLEIMe1utrJPXeOqXhwIz5slFxu16Wa0gGOjU/RfpniVOlUcRzZ7oO6PTM2Z+XCffESeQtslcNSZpf9Z1p3pqAD+cmlUDjIDFWo6EWw4/1bVc9vaSO0g+t9c6tpZF9tHFNr7KyVYpA18U5pzEILgUgN38DkzVJUxvkwul0e8avZlbGgYbd6PC8ZiHfE7ztkRmzmC0Qd23m+OGM= 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: On Thu, Feb 15, 2024 at 10:31:58AM +0000, Ryan Roberts wrote: > Split __flush_tlb_range() into __flush_tlb_range_nosync() + > __flush_tlb_range(), in the same way as the existing flush_tlb_page() > arrangement. This allows calling __flush_tlb_range_nosync() to elide the > trailing DSB. Forthcoming "contpte" code will take advantage of this > when clearing the young bit from a contiguous range of ptes. > > Ordering between dsb and mmu_notifier_arch_invalidate_secondary_tlbs() > has changed, but now aligns with the ordering of __flush_tlb_page(). It > has been discussed that __flush_tlb_page() may be wrong though. > Regardless, both will be resolved separately if needed. > > Reviewed-by: David Hildenbrand > Tested-by: John Hubbard > Signed-off-by: Ryan Roberts Acked-by: Mark Rutland Mark. > --- > arch/arm64/include/asm/tlbflush.h | 13 +++++++++++-- > 1 file changed, 11 insertions(+), 2 deletions(-) > > diff --git a/arch/arm64/include/asm/tlbflush.h b/arch/arm64/include/asm/tlbflush.h > index 1deb5d789c2e..3b0e8248e1a4 100644 > --- a/arch/arm64/include/asm/tlbflush.h > +++ b/arch/arm64/include/asm/tlbflush.h > @@ -422,7 +422,7 @@ do { \ > #define __flush_s2_tlb_range_op(op, start, pages, stride, tlb_level) \ > __flush_tlb_range_op(op, start, pages, stride, 0, tlb_level, false, kvm_lpa2_is_enabled()); > > -static inline void __flush_tlb_range(struct vm_area_struct *vma, > +static inline void __flush_tlb_range_nosync(struct vm_area_struct *vma, > unsigned long start, unsigned long end, > unsigned long stride, bool last_level, > int tlb_level) > @@ -456,10 +456,19 @@ static inline void __flush_tlb_range(struct vm_area_struct *vma, > __flush_tlb_range_op(vae1is, start, pages, stride, asid, > tlb_level, true, lpa2_is_enabled()); > > - dsb(ish); > mmu_notifier_arch_invalidate_secondary_tlbs(vma->vm_mm, start, end); > } > > +static inline void __flush_tlb_range(struct vm_area_struct *vma, > + unsigned long start, unsigned long end, > + unsigned long stride, bool last_level, > + int tlb_level) > +{ > + __flush_tlb_range_nosync(vma, start, end, stride, > + last_level, tlb_level); > + dsb(ish); > +} > + > static inline void flush_tlb_range(struct vm_area_struct *vma, > unsigned long start, unsigned long end) > { > -- > 2.25.1 >