From patchwork Fri Apr 5 11:58:15 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Paolo Bonzini X-Patchwork-Id: 13618960 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 47862CD11C2 for ; Fri, 5 Apr 2024 11:58:44 +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:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=PY56NxqA/cWYTuop/tw42sp/qi0pu5oyo3sXs8cq9yY=; b=p3yr/+iWwnsUs7 Djys/S4H3/fNyLV4qaD0Jj3MI1n19jvu3EPnOMSa3VN0YykIVaq5I81gZsIEXPw7oEVSxT8S57dLy UYDqeGYL4zTXNLoH73XgtgUImdfZyrmfb3JVe/6p1Td7+tGwpk0RR4xSLsGxpWL0QAjp+UlqmSkUs sPhexc1f2F6UOMTX7uN/9WP3VrHI4C8dDFojeS85tEHYna8Mp303sakWuA4xkxtdl7t1BXuUcCErd RiKeMeHaaVJiQiRql6mNNOdLDLgOXnsS8CC5x1lm2vGKdAjBUGlejoO+0E83rvk7mwMPyLTUgQqio FYZOpVj/xPxUGcAQo08Q==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1rsiDJ-00000006mQj-23Xg; Fri, 05 Apr 2024 11:58:33 +0000 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1rsiDC-00000006mLF-0E66 for linux-arm-kernel@lists.infradead.org; Fri, 05 Apr 2024 11:58:28 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1712318305; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=bNbIAMV3AIIh+finZC0kYCtErDA0HoO+gaZWe4mDURE=; b=JymmR/fNM+75yw2Z/21+89BIdezz+iJiZ3s8WfMnRutBtF48gjo7ZFKmr49GUamTKmJC5G cJBpYtz65kYGDyKSYy2T+VLWNU2Y1ZDKth+pSViTuObFVWiNMD0I+PSzBKC3CI16tJn1G/ ip02XXPHuvOXBChG17XpMsuyVE1W81s= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-216-j7EJIyIYM6OGTJqf_yp9KQ-1; Fri, 05 Apr 2024 07:58:23 -0400 X-MC-Unique: j7EJIyIYM6OGTJqf_yp9KQ-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.rdu2.redhat.com [10.11.54.2]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 584B885CF01; Fri, 5 Apr 2024 11:58:22 +0000 (UTC) Received: from virtlab701.virt.lab.eng.bos.redhat.com (virtlab701.virt.lab.eng.bos.redhat.com [10.19.152.228]) by smtp.corp.redhat.com (Postfix) with ESMTP id D080D40C6CB5; Fri, 5 Apr 2024 11:58:20 +0000 (UTC) From: Paolo Bonzini To: linux-kernel@vger.kernel.org, kvm@vger.kernel.org Cc: Marc Zyngier , Oliver Upton , Tianrui Zhao , Bibo Mao , Thomas Bogendoerfer , Nicholas Piggin , Anup Patel , Atish Patra , Sean Christopherson , Andrew Morton , David Hildenbrand , linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev, loongarch@lists.linux.dev, linux-mips@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, kvm-riscv@lists.infradead.org, linux-mm@kvack.org, linux-trace-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org Subject: [PATCH 4/4] mm: replace set_pte_at_notify() with just set_pte_at() Date: Fri, 5 Apr 2024 07:58:15 -0400 Message-ID: <20240405115815.3226315-5-pbonzini@redhat.com> In-Reply-To: <20240405115815.3226315-1-pbonzini@redhat.com> References: <20240405115815.3226315-1-pbonzini@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.2 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240405_045826_342460_875057C0 X-CRM114-Status: GOOD ( 15.02 ) 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: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org With the demise of the .change_pte() MMU notifier callback, there is no notification happening in set_pte_at_notify(). It is a synonym of set_pte_at() and can be replaced with it. Signed-off-by: Paolo Bonzini Reviewed-by: Philippe Mathieu-Daudé Reviewed-by: David Hildenbrand --- include/linux/mmu_notifier.h | 2 -- kernel/events/uprobes.c | 5 ++--- mm/ksm.c | 4 ++-- mm/memory.c | 7 +------ mm/migrate_device.c | 8 ++------ 5 files changed, 7 insertions(+), 19 deletions(-) diff --git a/include/linux/mmu_notifier.h b/include/linux/mmu_notifier.h index 8c72bf651606..d39ebb10caeb 100644 --- a/include/linux/mmu_notifier.h +++ b/include/linux/mmu_notifier.h @@ -657,6 +657,4 @@ static inline void mmu_notifier_synchronize(void) #endif /* CONFIG_MMU_NOTIFIER */ -#define set_pte_at_notify set_pte_at - #endif /* _LINUX_MMU_NOTIFIER_H */ diff --git a/kernel/events/uprobes.c b/kernel/events/uprobes.c index e4834d23e1d1..f4523b95c945 100644 --- a/kernel/events/uprobes.c +++ b/kernel/events/uprobes.c @@ -18,7 +18,6 @@ #include #include #include /* anon_vma_prepare */ -#include /* set_pte_at_notify */ #include /* folio_free_swap */ #include /* user_enable_single_step */ #include /* notifier mechanism */ @@ -195,8 +194,8 @@ static int __replace_page(struct vm_area_struct *vma, unsigned long addr, flush_cache_page(vma, addr, pte_pfn(ptep_get(pvmw.pte))); ptep_clear_flush(vma, addr, pvmw.pte); if (new_page) - set_pte_at_notify(mm, addr, pvmw.pte, - mk_pte(new_page, vma->vm_page_prot)); + set_pte_at(mm, addr, pvmw.pte, + mk_pte(new_page, vma->vm_page_prot)); folio_remove_rmap_pte(old_folio, old_page, vma); if (!folio_mapped(old_folio)) diff --git a/mm/ksm.c b/mm/ksm.c index 8c001819cf10..108a4d167824 100644 --- a/mm/ksm.c +++ b/mm/ksm.c @@ -1345,7 +1345,7 @@ static int write_protect_page(struct vm_area_struct *vma, struct page *page, if (pte_write(entry)) entry = pte_wrprotect(entry); - set_pte_at_notify(mm, pvmw.address, pvmw.pte, entry); + set_pte_at(mm, pvmw.address, pvmw.pte, entry); } *orig_pte = entry; err = 0; @@ -1447,7 +1447,7 @@ static int replace_page(struct vm_area_struct *vma, struct page *page, * See Documentation/mm/mmu_notifier.rst */ ptep_clear_flush(vma, addr, ptep); - set_pte_at_notify(mm, addr, ptep, newpte); + set_pte_at(mm, addr, ptep, newpte); folio = page_folio(page); folio_remove_rmap_pte(folio, page, vma); diff --git a/mm/memory.c b/mm/memory.c index f2bc6dd15eb8..9a6f4d8aa379 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -3327,13 +3327,8 @@ static vm_fault_t wp_page_copy(struct vm_fault *vmf) ptep_clear_flush(vma, vmf->address, vmf->pte); folio_add_new_anon_rmap(new_folio, vma, vmf->address); folio_add_lru_vma(new_folio, vma); - /* - * We call the notify macro here because, when using secondary - * mmu page tables (such as kvm shadow page tables), we want the - * new page to be mapped directly into the secondary page table. - */ BUG_ON(unshare && pte_write(entry)); - set_pte_at_notify(mm, vmf->address, vmf->pte, entry); + set_pte_at(mm, vmf->address, vmf->pte, entry); update_mmu_cache_range(vmf, vma, vmf->address, vmf->pte, 1); if (old_folio) { /* diff --git a/mm/migrate_device.c b/mm/migrate_device.c index b6c27c76e1a0..66206734b1b9 100644 --- a/mm/migrate_device.c +++ b/mm/migrate_device.c @@ -664,13 +664,9 @@ static void migrate_vma_insert_page(struct migrate_vma *migrate, if (flush) { flush_cache_page(vma, addr, pte_pfn(orig_pte)); ptep_clear_flush(vma, addr, ptep); - set_pte_at_notify(mm, addr, ptep, entry); - update_mmu_cache(vma, addr, ptep); - } else { - /* No need to invalidate - it was non-present before */ - set_pte_at(mm, addr, ptep, entry); - update_mmu_cache(vma, addr, ptep); } + set_pte_at(mm, addr, ptep, entry); + update_mmu_cache(vma, addr, ptep); pte_unmap_unlock(ptep, ptl); *src = MIGRATE_PFN_MIGRATE;