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 5C623C982E1 for ; Mon, 21 Sep 2026 10:58:12 +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:Cc:To:In-Reply-To:References:Message-Id :MIME-Version:Subject:Date:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=VONyg5zWXh++Y6enbH7dcXvBfG+2u//XU9eSRyLhQss=; b=4G+3biQ7Nx4l3a ckPMOxINiZyid8UVa8GVVyZ3lgKyM56YQbj+UMFKdbxDr8DxWJyzGZYWjivwasUf0mI810HfmviaG bEiOZr/rNM8yAff9ZevFpyPEIlmFEDglIWcBQKArzBwPUBN7oKVHlKPiCMTEEzM9701Xc3paocpYq F59eTA5nFC5U+5PCzUsLOcNi6dhUEUNiEiLYAusfCsN28N2TopYYUemcrKvQ7vSe4cAZsYGs5CZvd BgBOzgUg6lziX7xKZACQdh3w/nGpSP4e+T+BXfUy+t6HG7TowkdSRz49PQ/+YqyAvTMaBRNblPVSl 0VG3pm/6JxREptUm5a1g==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1x8bii-00000001mb0-2Csv; Mon, 21 Sep 2026 10:58:00 +0000 Received: from desiato.infradead.org ([2001:8b0:10b:1:d65d:64ff:fe57:4e05]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1x8bib-00000001mWI-3eqs; Mon, 21 Sep 2026 10:57:54 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=Cc:To:In-Reply-To:References: Message-Id:Content-Transfer-Encoding:Content-Type:MIME-Version:Subject:Date: From:Sender:Reply-To:Content-ID:Content-Description; bh=Kqu7jR4LZ6KFKtyM96Yqa71AZjrybXBKCvKDll9J4VY=; b=UdnSltXsCWVp4EQ84el0S1d1v7 rcv1QHBmesncmFWj9he23AJh2J/tLYsgVpt011sBjf3rVxjjotun1VtNNxIVFV2uXiTzpQPEFjQ82 KRiaykUluqKUtuTDXhT7Jvg30uuMIUKNAQ8Y+rTJO1GU7N7sUoQnBag+G+stViyNsIizTFNyYiM1D AL1jfcsB2szHNzIv6Xjv8AgCT6n/TDMUJqXOSHCGtA9ja0Hy+eX8xHPgg/1JmQi86k2ncJssI3zJ/ wlw12mntUFw5/+D6JW3KlXyaCcsGS7UODvB5GhUpC31Ui9PG8g9MdSBFz40034NSEMQYEAfIVjAqg jxH3qNew==; Received: from foss.arm.com ([217.140.110.172]) by desiato.infradead.org with esmtp (Exim 4.99.2 #2 (Red Hat Linux)) id 1x8biM-0000000C9M9-2ueE; Mon, 21 Sep 2026 10:57:52 +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 293551570; Mon, 21 Sep 2026 03:57:33 -0700 (PDT) Received: from e129823.arm.com (e129823.arm.com [10.2.213.3]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 6DC153F86C; Mon, 21 Sep 2026 03:57:29 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=arm.com; s=foss; t=1789988256; bh=tenWdx/UAPDDmgqvhn1jTW0rtV2ElcnA6e+1jtwaJs8=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=r3qQ0wEnceoNCSAemMvOXk/eg6xJzFlkI2IyMBaatbiz4/x7s7q8hXTaO0Vl8MDQ4 rS0/4H24aYxcUvmqdedXNG5j5+laQn70ovdDLv2Urbd3WHUzthrh0Kec8w0w+ul6hy 3zGTSf1mygcnWXtKW69QPNHlW0tU/7g+HwsoV8R8= From: Yeoreum Yun Date: Mon, 21 Sep 2026 11:55:31 +0100 Subject: [PATCH 09/21] loongarch: kvm: remove stack copy address of pXd in pXd_offset() MIME-Version: 1.0 Message-Id: <20260921-dummy_ptxp3-v1-9-cd40cf68242e@arm.com> References: <20260921-dummy_ptxp3-v1-0-cd40cf68242e@arm.com> In-Reply-To: <20260921-dummy_ptxp3-v1-0-cd40cf68242e@arm.com> To: Russell King , Huacai Chen , WANG Xuerui , Thomas Bogendoerfer , Catalin Marinas , Will Deacon , Arnd Bergmann , Andrew Morton , Kairui Song , Qi Zheng , Shakeel Butt , Barry Song , Axel Rasmussen , Yuanchu Xie , Wei Xu , Johannes Weiner , David Hildenbrand , Michal Hocko , Lorenzo Stoakes , Tianrui Zhao , Bibo Mao , Anup Patel , Atish Patra , Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti , Dave Hansen , Andy Lutomirski , Peter Zijlstra , Thomas Gleixner , Ingo Molnar , Borislav Petkov , x86@kernel.org, "H. Peter Anvin" , "Liam R. Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Jonas Bonn , Stefan Kristiansson , Stafford Horne Cc: 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, linux-mm@kvack.org, kvm@vger.kernel.org, kvm-riscv@lists.infradead.org, linux-riscv@lists.infradead.org, linux-openrisc@vger.kernel.org, Yeoreum Yun X-Mailer: b4 0.13.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=2052; i=yeoreum.yun@arm.com; h=from:subject:message-id; bh=tenWdx/UAPDDmgqvhn1jTW0rtV2ElcnA6e+1jtwaJs8=; b=owEB7QES/pANAwAKAW3Vw9FaxTEzAcsmYgBqsQ1PJaEMk0o9SRiHZSjHIfm+GrA188fN+4hRU 6wJUgjEtAaJAbMEAAEKAB0WIQQtg+CS3QUzuFh1pJ1t1cPRWsUxMwUCarENTwAKCRBt1cPRWsUx M8LxC/9j9lKenvxhbWb1SDdCXY3s7kZnCDH1casxpL2CIqsMn1jRkSXlvvWc0FK7/ooO4WCtNPY isddhbQdba3tQ14ARwFYleVeWNNmiT05JGvjASoPg50ySoGJaDe19OE4hZWOghnmxjkdc86g7jL gcCOPOwe9mQY4LNYG8oZF9///bcv3szPoREYgWxSzP1vxiY0prT9Dyfrv3zTgfStuBUY4ntnptW G6zFnDbNPzkifb/jVOuDI1ksUJyOcnJzCCWQh8wAul/S21IO6AC6udNQZCpR4UHngkTh0e7kUgq arNAcFyIjLTCw2utF3PQlxLJylHPboWGN6Qby0dJF/WPvfwiMZ5ZqM7rzEP8W0iKnUglDk7bkpP V87UdgAwIoTi1oSvrjliTDJV5yEBgdqYWHvSXN54WMH8yzs8AO3xWzAryfmg1jwsGVfcCNvBtRA 5hUpniFYmqdNtZll1Rh6ljx/ikMnaZyFYSHYscH16HGIFR1qU5Wck0IPfXF0jYchNE1jQ= X-Developer-Key: i=yeoreum.yun@arm.com; a=openpgp; fpr=2D83E092DD0533B85875A49D6DD5C3D15AC53133 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260921_115750_539508_621436A4 X-CRM114-Status: GOOD ( 11.23 ) X-BeenThere: linux-riscv@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-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org The behaviour of pXdp_get() will change with generic compile-time folded page tables. To prepare for that, rework host_pfn_mapping_level() to avoid use of a stack copy of a pXd and pass it as argument to pXd_offset() so that the folded entries value is ignored. Replace direct uses of stack-based pXd values with pXd_offset_lockless(). And there should be no functional change. Reviewed-by: David Hildenbrand (Arm) Signed-off-by: Yeoreum Yun --- arch/loongarch/kvm/mmu.c | 20 ++++++++++++-------- 1 file changed, 12 insertions(+), 8 deletions(-) diff --git a/arch/loongarch/kvm/mmu.c b/arch/loongarch/kvm/mmu.c index e104897aa5328..837b40bb694f4 100644 --- a/arch/loongarch/kvm/mmu.c +++ b/arch/loongarch/kvm/mmu.c @@ -669,10 +669,10 @@ static int host_pfn_mapping_level(struct kvm *kvm, gfn_t gfn, int level = 0; unsigned long hva; unsigned long flags; - pgd_t pgd; - p4d_t p4d; - pud_t pud; - pmd_t pmd; + pgd_t *pgdp, pgd; + p4d_t *p4dp, p4d; + pud_t *pudp, pud; + pmd_t *pmdp, pmd; /* * Note, using the already-retrieved memslot and __gfn_to_hva_memslot() @@ -698,19 +698,23 @@ static int host_pfn_mapping_level(struct kvm *kvm, gfn_t gfn, * value) and then p*d_offset() walks into the target huge page instead * of the old page table (sees the new value). */ - pgd = pgdp_get(pgd_offset(kvm->mm, hva)); + pgdp = pgd_offset(kvm->mm, hva); + pgd = pgdp_get(pgdp); if (pgd_none(pgd)) goto out; - p4d = p4dp_get(p4d_offset(&pgd, hva)); + p4dp = p4d_offset_lockless(pgdp, pgd, hva); + p4d = p4dp_get(p4dp); if (p4d_none(p4d) || !p4d_present(p4d)) goto out; - pud = pudp_get(pud_offset(&p4d, hva)); + pudp = pud_offset_lockless(p4dp, p4d, hva); + pud = pudp_get(pudp); if (pud_none(pud) || !pud_present(pud)) goto out; - pmd = pmdp_get(pmd_offset(&pud, hva)); + pmdp = pmd_offset_lockless(pudp, pud, hva); + pmd = pmdp_get(pmdp); if (pmd_none(pmd) || !pmd_present(pmd)) goto out; -- 2.43.0 _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv