From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793811029; b=N+VrRVMCJAJ+j3UQnScTeqjeKsUbfOMLeG7L3Pzr6INwcuQmpNTfA01FxzFJUHgUlAeQ f/P7giypLY64TBvoqXlgNvHX0Dy+Nx62TXAqMbFSsYyb3h+MUKk2OSlMt/dcgqfxQ7uqE 0T/Iwpsum/DdtjZBaUk+vA5mgbPlvBc4SfaL4LzDxaUsHrE52JkoYnSvIcH22U3eASbdb xzeHTIfOfPFB+h+yNVKVQnDXlRLzkDcviiHOUBgHISOCmgBbanXKUiX5CkKOUv4qWSEbe 5XCDX/xmSGrSY7FO9IJ9v4i1osKqhlIhBxjloQr4iHB8NuRErW5Vq1JKKT2a5Er54vQ== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793811029; h=Received:DKIM-Signature:From:To:Cc:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:MIME-Version:Content-Transfer-Encoding; bh=WRcEmA8t5SF2n7O8yFpnu4RLNkBYJrrcArfzz4S7jNs=; b=bhFPOyUl8hjRgrmuVdYYu1Nppl3xaMsJac4SptD28mIrtHea2qQewfR30/ncpFDrGNVF AtFD8ZiIgQORUAeKTLW0+ND6g9M4vrhI6VHo2pcykNr4tro5zAK+sBtV8hlvbuBJB4iF9 +GwnRV0GwbshdTTO8j8vensjyWkE+6SVLz6n0P2XZlJoel3XBD5i+TTJE6ZpX23uCO7G2 QxocTT7dXp9FUu0xSJrmhQj5BUFsmk8gS7bGIsAJZ3eErQxeVbaK+F7lUTECe0tEGIdO4 41LSQQGrGfZ/HO3kXMD5EHNKCDPerxJAhN9INU+7ok6kqpX280iqkiFScYEYs7zDn7Q== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=PNHISvmm; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 333C5608361B; Wed, 4 Nov 2026 16:50:28 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=PNHISvmm Received: by smtp.kernel.org (Postfix) with ESMTPSA id BBD141F000C1; Wed, 4 Nov 2026 16:50:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1793811028; bh=WRcEmA8t5SF2n7O8yFpnu4RLNkBYJrrcArfzz4S7jNs=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=PNHISvmmuWjnQ+7HEMPvfWz7APstuBwKvr1lPLt9SDxVD52Vkc79+yVtOnwJmbyNC kF3VIBOQN8Tv/NCYUFGkB1Ewlk8dNuqsqTFNCvdi/M8s0mqa4qJbvFMf2QdSogLylC ThlzcIiqi5pt78dU2OO7HwbdrO2irxa0n2otgDaR2QqXqHJrXJxDl9msL9PSIy7Qwa Sf08ADUUdKytxN4QMa4AMfeT3c7TchiL7bLh4pChwjEKQv3xIwVie+GbtUsWpCCdU1 DoA0s2U7su4v/sRB0t2KrIZ4x0ji+QvFqAQqB4xvWBnTdKepiQyTfwIEP0Ghi9AV1G hBXp3vzGdOQIA== From: "Aneesh Kumar K.V (Arm)" To: linux-coco@lists.linux.dev Cc: "Aneesh Kumar K.V (Arm)" , Andrew Morton , Baoquan He , Mike Rapoport , Pasha Tatashin , Pratyush Yadav , Catalin Marinas , =?UTF-8?q?Christian=20K=C3=B6nig?= , Jason Gunthorpe , Joerg Roedel , Marc Zyngier , Marek Szyprowski , Robin Murphy , Steven Price , Sumit Semwal , Suzuki K Poulose , Thomas Gleixner , Will Deacon , Russell King , Benjamin Gaignard , Brian Starkey , John Stultz , Mark Rutland , Radu Rendec , "T.J. Mercier" , Madhavan Srinivasan , Michael Ellerman , Nicholas Piggin , Christophe Leroy , Ritesh Harjani , Shrikanth Hegde , Alexander Gordeev , Gerald Schaefer , Heiko Carstens , Vasily Gorbik , Christian Borntraeger , Sven Schnelle , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, "H . Peter Anvin" , Kiryl Shutsemau , Rick Edgecombe , "K . Y . Srinivasan" , Haiyang Zhang , Wei Liu , Dexuan Cui , Long Li , Paolo Bonzini , Vitaly Kuznetsov , Andy Lutomirski , Peter Zijlstra , dri-devel@lists.freedesktop.org, iommu@lists.linux.dev, linaro-mm-sig@lists.linaro.org, linux-arm-kernel@lists.infradead.org, linux-media@vger.kernel.org, linux-mm@kvack.org, kvmarm@lists.linux.dev, patches@lists.linux.dev Subject: [PATCH v9 13/14] mm: Assert CoCo shared allocations may sleep Date: Wed, 4 Nov 2026 22:15:54 +0530 Message-ID: <20261104164555.3555725-14-aneesh.kumar@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20261104164555.3555725-1-aneesh.kumar@kernel.org> References: <20261104164555.3555725-1-aneesh.kumar@kernel.org> X-Mailing-List: linux-coco@lists.linux.dev List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit On platforms with memory encryption, alloc_cc_shared_pages_node() transitions the allocated memory to the shared state. set_memory_decrypted() may sleep, so the transition must run from a sleepable context. Cc: Andrew Morton Signed-off-by: Aneesh Kumar K.V (Arm) --- mm/cc_shared.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/mm/cc_shared.c b/mm/cc_shared.c index 40c130cce74b..e70c26df2d06 100644 --- a/mm/cc_shared.c +++ b/mm/cc_shared.c @@ -8,6 +8,7 @@ #include #include #include +#include #include #include #include @@ -106,6 +107,8 @@ static int __alloc_cc_shared_pages_node(int nid, gfp_t gfp, unsigned int order; int ret; + might_sleep(); + ret = cc_shared_calc_layout(requested, &layout); if (ret) return ret; -- 2.43.0