From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-wm1-f72.google.com (mail-wm1-f72.google.com [209.85.128.72]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 63F481CAA6C for ; Fri, 18 Sep 2026 13:19:02 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.72 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789737544; cv=none; b=TykXqWYswgdvyQhJ6+HeeREPlGZUNAJAw5FVufCbYF4NOA9SwrProTbRxg8yTQ9IgnviksZ1Yrv02852UwkmjzLVIzKiGFedJGSZPCc5q8tjc5C+Waxwfq6VGK0/AuKP/lhFgz7nxz4NsrPtGxfK7070/No1zsT6yUGvw7ODHVY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789737544; c=relaxed/simple; bh=rz+u7nKKPKCkeRipCcTkGP8jjZ5LSw18vUegoNJmQYY=; h=Date:Mime-Version:Message-ID:Subject:From:To:Cc:Content-Type; b=H05+5uJI6QuAxxv5qfNXUxVTWd3voTo2NKfixzXHbhO/nXlM+kBsKtt0qdw0PQjniibLXPtQwKs8Esiy1vunKjSNgpebeNZjmcyrawtjOcrpw+17WLInwECB73PaGB+KMFryEH46xZIeAutBw0sIEr4eLH6XCTb4VsY2aOIabK8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--vdonnefort.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=l3DfI1zm; arc=none smtp.client-ip=209.85.128.72 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--vdonnefort.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="l3DfI1zm" Received: by mail-wm1-f72.google.com with SMTP id 5b1f17b1804b1-4957287363bso7023525e9.0 for ; Fri, 18 Sep 2026 06:19:02 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1789737540; x=1790342340; darn=vger.kernel.org; h=content-type:cc:to:from:subject:message-id:mime-version:date:from :to:cc:subject:date:message-id:reply-to:content-type; bh=k3SNv/hlO2h0xkklONRKfGgBfOPQjFyFw6MzNkTps1c=; b=l3DfI1zmBQITvwk2y1uZjuastry2Vsl6i8GCMuVWq37Eumzbq9OZny7HJ5pSAgwZNb Jexu/vTuVvx4jBJteC3n6+GrkUxhUkbCqcNG/4uU/rh8tuuyh74osur/LPb03c0QP9da XE00WfQhdQkgSRidQFIjt68GNW9vcb6PpoTo/6x0YTwt5mVukuis3rXHWClrx/Vul+xP uI+iuGxsNYS3Wbn7wKtiqRJT/t8XMJIdnf219kDpB4wGcnHMelL4g2Pf5/m2Ts0IgJEg xsMaq6pydpwHV/Ru7xe11NWM/FEk9pU11nZhkbHEfF9SEx4pI1wfjowAKXdEjuLdjjMM vdHQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20260707; t=1789737540; x=1790342340; h=content-type:cc:to:from:subject:message-id:mime-version:date :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to :content-type; bh=k3SNv/hlO2h0xkklONRKfGgBfOPQjFyFw6MzNkTps1c=; b=lqCrwtbe+j86dvgv5n5n0h8SCMNfmaRA17+TMm+9KOwh0ctgisNHl7XhbmdbuOm1ef wL+ywCtkCqT8f2LMGYReA+IlfTJIM5V1qICH5QFg+1nkPcr1moSGJ78ePt58nff9Fd6L wW6jB0+KNO6zeDwyh+XvrHYmTQyX+bwJ/Gp6n0GEGxFzXxhzxcDPnR/sqkVwYEvrttpz q+5AQCLqsFREiqz8RnfnuSnassFAbjBB+ty7pQXxZjbCrQrp5H6AoZwbw18SwgBPyZM7 cVzgAY6AAEtnwoXLALN1IUlzIrKc2geXVXHqCedG2GTxnpR7aXlVryY3GoElP/EmDynw 3t1w== X-Forwarded-Encrypted: i=1; AKwUvByp/kb/yLUKdZX61ohyUAcTX3TdgYY0vci4RuUxth7Fo1FcsQXQtxNiqV2LLYX6FzPzw8BQAeGuIhqMyoE=@vger.kernel.org X-Gm-Message-State: AFuF++kCCexZv5RtqszUwwNpVr4P994RPBcXFWsLQnEaMcRNC7ca0hLR UFLZvTTHiI6JDbLip8RLmLCL+cu98W85wRqvINkbKiL4V9oqDGQ7J5qbpnvARsaIgjyMK9EASM3 JxzvzrWqlCY52o5s3QHdghQ== X-Received: from wmrk15.prod.google.com ([2002:a05:600c:b4f:b0:49c:e349:ff6f]) (user=vdonnefort job=prod-delivery.src-stubby-dispatcher) by 2002:a05:600c:4f09:b0:493:aa0a:45ad with SMTP id 5b1f17b1804b1-49fc56692c6mr32982165e9.2.1789737540280; Fri, 18 Sep 2026 06:19:00 -0700 (PDT) Date: Fri, 18 Sep 2026 14:16:52 +0100 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 X-Mailer: git-send-email 2.55.0.1082.g2b9226bbc0-goog Message-ID: <20260918131656.3710047-1-vdonnefort@google.com> Subject: [PATCH v1 0/4] arm64: mm: Allow set_direct_map functions on BBML3 systems From: Vincent Donnefort To: catalin.marinas@arm.com, will@kernel.org, rafael@kernel.org Cc: mark.rutland@arm.com, lenb@kernel.org, pavel@kernel.org, linux-arm-kernel@lists.infradead.org, linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, thierry.reding@kernel.org, rppt@kernel.org, Vincent Donnefort Content-Type: text/plain; charset="UTF-8" This series is a fork of [1] which creates a new CMA pool for FF-A lent memory which unmaps that memory from the linear map as a mitigation of CPU speculative access to Secure memory. [1] creates a PTE-level region to enable setting the direct map, but BBML3 systems shouldn't need it. Currently, can_set_direct_map() only returns true if a feature forces the linear map to be mapped at PTE granularity. This prevents systems supporting BBML3 from enabling set_direct_map*() functions yet safe. To enable them, this series: 1. Use the fixmap for hibernation. This removes the need for handling atomic context in split_kernel_leaf_mapping(). 2. Breaks the dependency between linear_map_requires_bbml3 and can_set_direct_map() 3. Allow split_kernel_leaf_mapping() even when no feature requires to set the direct map. [1] https://lore.kernel.org/all/20260902104712.2399797-1-vdonnefort@google.com/ Vincent Donnefort (4): PM: hibernate: Add arch specific hooks for hibernate_map/unmap_page arm64: hibernate: Use fixmap for hibernate_map/unmap_page arm64: mm: Introduce linear_map_needs_set() helper arm64: mm: Allow can_set_direct_map() on BBML3 systems arch/arm64/include/asm/fixmap.h | 3 +++ arch/arm64/include/asm/mmu.h | 1 + arch/arm64/kernel/hibernate.c | 12 +++++++++ arch/arm64/mm/mmu.c | 46 +++++++++++++++++++++++++-------- arch/arm64/mm/pageattr.c | 12 +-------- include/linux/suspend.h | 2 ++ kernel/power/snapshot.c | 10 ++++--- 7 files changed, 60 insertions(+), 26 deletions(-) base-commit: fd73f4a6659897191fa0d40695fe370925dd3780 -- 2.55.0.1082.g2b9226bbc0-goog