From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 6ADF945A2B4; Thu, 24 Sep 2026 10:09:32 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790244581; cv=none; b=HOMAiEdW/W5o5C0r2eL5hYzaEu0DoQGeaHeELnuUF885aireV0+wa0qe2FH3VeYhMdAFYSvnw5hD0CFRt9/kP1JFimxuFgzcKk2yVW3jHWuMpomYlisTCH243FlPDl8ewEBAdWBLNTi0ECgXTmNjLavGrHlz5awiw9MP9J+4vTI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790244581; c=relaxed/simple; bh=avIOrMrcCb3ADh7Va+Vlx0jLbixEvoTxHwR3rEyIMcs=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=rSVjuoNDvEAk0kg52VcDDUQs77g3mzX2WmG6nxJsLuCGxYJhANlIMEd55as8zQi914Oyx8bdn8Nm1BJ9khEFozyZe5hrA1oK8y78tubbd8mSr7RgOc7J5s0w7Jgfoq5pGKcDGi2Hw7xFIipNFfpfiEmJ6JoLQdwgS4aoToSjP0U= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=dnSLogll; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="dnSLogll" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 507301F000FF; Thu, 24 Sep 2026 10:09:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1790244569; bh=T/L8GH36WphB4FWEap/OQWo2XNq0RD33mRMiQ8zqE3c=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=dnSLogllfOwGPjiiYgYeYNLUbV922KBGPQBr1iWfsc0tB53dUpUKxf7Bdtcpcr3bI N/yMdNt2Ov0UkVr3MhgwO2+hKGw0VJvasN8PtaGsg7DTl5Ql1ufzTr95NdJDCRfBOD wRMGS47TdnCWOSqXI+wAq/TqxOS5zw8/ZLyamBfgIKhWLJU98AI0JXzOWvht07ccMo 2JB/877rqVQmvUlpiMOQYNo009UWntXGbqTXDczrJzMPMIo32vZaRkqz6B5foRNisc tn0L4hnJrri/j4++dOckyGH9o5Ual1j5zyEjqvpx9L8hqj3USKaRp7UJIrXQt3YkOi q/ADwv496KpUg== From: "Aneesh Kumar K.V (Arm)" To: linux-coco@lists.linux.dev, kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, iommu@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, linaro-mm-sig@lists.linaro.org, linux-media@vger.kernel.org, linux-mm@kvack.org Subject: [RFC PATCH v8 13/14] mm: Assert CoCo shared allocations may sleep Date: Thu, 24 Sep 2026 15:35:28 +0530 Message-ID: <20260924100529.1398790-14-aneesh.kumar@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260924100529.1398790-1-aneesh.kumar@kernel.org> References: <20260924100529.1398790-1-aneesh.kumar@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: 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 9eb79832a702..6f68a3f44ef8 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