From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 782FE3346BF; Fri, 27 Feb 2026 20:13:32 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772223212; cv=none; b=XSfpR8w6iljlMWjs/4jVfOL6T70JqxNl2bWIEyj+eM9WRVgH45jTLOanBy9mh7WZ7nGP1KoMH5j2KosdRKQ6SSCb7ZxhAi9o0jbZsIp8tDmLWijo/9erHOgNhLCM2mtlGf3pSOTtuHEcwVQ4ZtjDy1jj+Ps0TDa5Jzhu9zWObko= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772223212; c=relaxed/simple; bh=8DjODQ9JTo8rNPBCTFGX0cqEx7ur/z2XYX0+HQB8juc=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=io7prNS5LG0/MeavSg9xCiOYpZ4eKw/B43ZJENnijM/gf5fumu5pDX6zPrqgJc9mxdjSXjXy2Aweb/7Gh2FhxPPJ364cm4rIRULU/f6WJJdyAx2BFPok5//hf4AXHx3THpR8SSpsxt1RAnXMiqDOpBOHOFb+GQjKmdTgCfecWCY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=BsV4ULrX; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="BsV4ULrX" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2C5BFC116C6; Fri, 27 Feb 2026 20:13:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1772223212; bh=8DjODQ9JTo8rNPBCTFGX0cqEx7ur/z2XYX0+HQB8juc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=BsV4ULrXcf69csyHSuGqVHkErg/TmBz0CXhzBZuPFMOJEd58YYsV9GY3LYfW2rxUB B/Bd+jNerrYiWu/dHQ4j9aEcpp/k/BLY3TOUIcBEDZazpW4Qb1rlsg807wAQftoetu oKHzBMSDxjv/CxuvG+QWIc4cPfrDOfwX0D5SZxDFnYn2LED/gYiKa1XwK/OgvUaDiQ wgo5tEx/CUq90wHpk0NTCoqjaz2e0NS8iGFwY2Tc6jUxOCGeEWKQQpTGNJBMzS+gGd d3N1RDyJOeuPtak0u7xYeGcKnNxHOOxKOC4LpkDRwUfoXIisyM7oV5jLZ/g+BGM9tD tmtukJMtnncfA== From: "David Hildenbrand (Arm)" To: linux-kernel@vger.kernel.org Cc: "linux-mm @ kvack . org" , "David Hildenbrand (Arm)" , Andrew Morton , Lorenzo Stoakes , "Liam R. Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Jann Horn , Pedro Falcato , David Rientjes , Shakeel Butt , "Matthew Wilcox (Oracle)" , Alice Ryhl , Madhavan Srinivasan , Michael Ellerman , Christian Borntraeger , Janosch Frank , Claudio Imbrenda , Alexander Gordeev , Gerald Schaefer , Heiko Carstens , Vasily Gorbik , Jarkko Sakkinen , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Greg Kroah-Hartman , =?UTF-8?q?Arve=20Hj=C3=B8nnev=C3=A5g?= , Todd Kjos , Christian Brauner , Carlos Llamas , Ian Abbott , H Hartley Sweeten , Jani Nikula , Joonas Lahtinen , Rodrigo Vivi , Tvrtko Ursulin , David Airlie , Simona Vetter , Jason Gunthorpe , Leon Romanovsky , Dimitri Sivanich , Arnd Bergmann , Alexei Starovoitov , Daniel Borkmann , Andrii Nakryiko , Peter Zijlstra , Arnaldo Carvalho de Melo , Namhyung Kim , Andy Lutomirski , Vincenzo Frascino , Eric Dumazet , Neal Cardwell , "David S. Miller" , David Ahern , Jakub Kicinski , Paolo Abeni , Miguel Ojeda , linuxppc-dev@lists.ozlabs.org, kvm@vger.kernel.org, linux-s390@vger.kernel.org, linux-sgx@vger.kernel.org, intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, linux-rdma@vger.kernel.org, bpf@vger.kernel.org, linux-perf-users@vger.kernel.org, linux-fsdevel@vger.kernel.org, netdev@vger.kernel.org, rust-for-linux@vger.kernel.org, x86@kernel.org Subject: [PATCH v1 16/16] mm/memory: support VM_MIXEDMAP in zap_special_vma_range() Date: Fri, 27 Feb 2026 21:08:47 +0100 Message-ID: <20260227200848.114019-17-david@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260227200848.114019-1-david@kernel.org> References: <20260227200848.114019-1-david@kernel.org> Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit There is demand for also zapping page table entries by drivers in VM_MIXEDMAP VMAs[1]. Nothing really speaks against supporting VM_MIXEDMAP for driver use. We just don't want arbitrary drivers to zap in ordinary (non-special) VMAs. [1] https://lore.kernel.org/r/aYSKyr7StGpGKNqW@google.com Signed-off-by: David Hildenbrand (Arm) --- mm/memory.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/mm/memory.c b/mm/memory.c index f3b7b7e16138..3fe30dc2f179 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -2239,13 +2239,13 @@ void zap_vma_range(struct vm_area_struct *vma, unsigned long address, * @size: number of bytes to zap * * This function does nothing when the provided address range is not fully - * contained in @vma, or when the @vma is not VM_PFNMAP. + * contained in @vma, or when the @vma is not VM_PFNMAP or VM_MIXEDMAP. */ void zap_special_vma_range(struct vm_area_struct *vma, unsigned long address, unsigned long size) { if (!range_in_vma(vma, address, address + size) || - !(vma->vm_flags & VM_PFNMAP)) + !(vma->vm_flags & (VM_PFNMAP | VM_MIXEDMAP))) return; zap_vma_range(vma, address, size); -- 2.43.0