From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-qv1-f53.google.com (mail-qv1-f53.google.com [209.85.219.53]) (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 ED5EA3546F3 for ; Mon, 13 Jul 2026 19:25:05 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.219.53 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783970707; cv=none; b=FxfIeFenQw4Yv2pONYL8T+mL1+TBVgc5+sGF+Kh9c0oSrly3vQoPa1pIEvMYJ8lxQR7dRHeubujyyMiq3Bdb4nPaaf8tsAk5iVEYSYNv2TyjtFsITKRRp8+DUcc2Enk4Ma0rrlUwMQYNRxt83enj9IpE4e2p8K8HHg9S6C0l7O4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783970707; c=relaxed/simple; bh=kHNC6GKxK3Oa0yY2t9YDWJJoMMfSAWNNMKsiuCwI/8Y=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=mD+uZ9H5UaNjIXlRdpASZA/QK9roERIiTAWpLNk5h8h9Sj+45ulSx5TfOHCAArNe/Or7IkcuvpMFGd0I+BZkpgeIM/ZpjDNevLpKgS5J1OVyAKe4S0/OKUM5iOQ1zfgb9d9wiwP6JlDVL+1i4f+PcEcuzzzrRyKwka9e/6rukvI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=ziepe.ca; spf=pass smtp.mailfrom=ziepe.ca; dkim=pass (2048-bit key) header.d=ziepe.ca header.i=@ziepe.ca header.b=ZiVg53fH; arc=none smtp.client-ip=209.85.219.53 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=ziepe.ca Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=ziepe.ca Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=ziepe.ca header.i=@ziepe.ca header.b="ZiVg53fH" Received: by mail-qv1-f53.google.com with SMTP id 6a1803df08f44-8e5be46f663so1796526d6.0 for ; Mon, 13 Jul 2026 12:25:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ziepe.ca; s=google; t=1783970705; x=1784575505; darn=lists.linux.dev; h=in-reply-to:content-disposition:content-type:mime-version :references:message-id:subject:cc:to:from:date:from:to:cc:subject :date:message-id:reply-to:content-type; bh=2kWy2240zOoLDDzwtKisgk31mZ51kjxw8fZyoUW4j0E=; b=ZiVg53fHXSjavq+okHU+ibOJ2D/hyKV2vcZxw8OguOxLeG5dZdL3RPINoNmahG0WJ9 M2qeDJ479v5mK0pjqLOQtYiXW/5fcQy0SPYE6g15aCicHckSM9230GQ7a3+qIE00jUC8 YYwzWB0PzK9XORoJQy8PwDDNCaOrC5xAwrzRyFu7aXYqJfpLFKBJ+N5pUwA6NsMezvma Ilhi/lBGD2z7hhkgLsQj1b7AET7D7Li4kh72SYv/B3U2sVMsaKiJ6EO6KEPmel2fD3Vg 3pCLy01r8XT4AcEeEhYcZ6rxV0/0gHgGKJWUsQxlnUkM4DW7lv1nQi/kYCjZBVkYR+cD T9hQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1783970705; x=1784575505; h=in-reply-to:content-disposition:content-type:mime-version :references:message-id:subject:cc:to:from:date:x-gm-gg :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to :content-type; bh=2kWy2240zOoLDDzwtKisgk31mZ51kjxw8fZyoUW4j0E=; b=PBaMrByxuh+zdhOwartQUmrR7F8F7d0RPByxx3vCRUQoQP5d4t4lrHUzLUWYLxxXfz x7pfcW3DyZYeMXeL+Uj1nZZbZELzT8l7G0avofk1ELoAhao0kDXRxO3Ghlg324HV0LpR TQzfD1NOvojijdsj8YPFd6yifyXOIDtG1wt+yQwcoCB2b6ewfAZcnozhoSuAe/skh5me 7FwtkGpDdgS+2NCRrJsvyZYnlIsTysQuM7EM/QxBKw+zkjZLBD97bKLOD3yXKtuEzAd2 HtA7wUyDuWrxEcuHBp2aMo/FXdDYGgazowj+RyR1jIS8DeZWuDMS0mDg7pEBqoI+iKPg 3Xmg== X-Forwarded-Encrypted: i=1; AHgh+RoZ811voO3M7xsIrDAZYT0xg9GXPrbQytSB0ofvmjPSpOFARmyE3rXwolcWNSvlG0krKbvg/vajXKss@lists.linux.dev X-Gm-Message-State: AOJu0YxlI0WAmiBVO5uZweEC5MMNk+DoLcj0j2URoV0kbv5d32K9v9Cw p/+9i0dCPGzDUmbdTKfClAxNIFr3XkGbYQ+zH279Z/OICG5py/3/AGozkLCDd7wD8Rw= X-Gm-Gg: AfdE7clWzzkFmapACDM0Jg9qmqIHoCy196jhl4kbqI1zPakGpYMxdvkZmvroRTKANCt fwhtGWz4xh8IUc9MBBTdWp/A55VnItLTjv0DKQAKQlaAwxW3/GlZRnbBPxDKWQ1Sk3DnqORUYmR qxujR7eODstZ0qCHIpS5ErdooyTtIHF4KQIXKnM/EYwW75vIyTiT9h1QNmsrncnfoRnrm5YILBb xmb6EAILm3EmUGuh/pyNWYJQXWZZXGXt40sZlhD7Hmqt3lqbVM/Zk8YfbJ16l7PohlCnw3sSo6j i2qKK4fDHwKzRwMJCXNhJDRNgEyp3RK4LJVwBUxwJNGPkjKWZFsiC8LvaVnNlNvVpsFEGreVXYK TQ7r8SdMCaNRbNT2vXuVyUtBdYmTPi3nLgUKbn78Fr1gxMPH1bE7DhaqIR4By X-Received: by 2002:a05:6214:2f8d:b0:8ef:76c:cb18 with SMTP id 6a1803df08f44-903fe450e81mr122377626d6.11.1783970703547; Mon, 13 Jul 2026 12:25:03 -0700 (PDT) Received: from ziepe.ca ([159.2.72.92]) by smtp.gmail.com with ESMTPSA id 6a1803df08f44-8ffd7c1da1bsm137170026d6.30.2026.07.13.12.25.02 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 13 Jul 2026 12:25:03 -0700 (PDT) Received: from jgg by wakko with local (Exim 4.97) (envelope-from ) id 1wjMH0-0000000E5NW-1O3S; Mon, 13 Jul 2026 16:25:02 -0300 Date: Mon, 13 Jul 2026 16:25:02 -0300 From: Jason Gunthorpe To: "Aneesh Kumar K.V (Arm)" Cc: iommu@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-coco@lists.linux.dev, Robin Murphy , Marek Szyprowski , Will Deacon , Marc Zyngier , Steven Price , Suzuki K Poulose , Catalin Marinas , Jiri Pirko , Mostafa Saleh , Petr Tesarik , Alexey Kardashevskiy , Dan Williams , Xu Yilun , linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, Madhavan Srinivasan , Michael Ellerman , Nicholas Piggin , "Christophe Leroy (CS GROUP)" , Alexander Gordeev , Gerald Schaefer , Heiko Carstens , Vasily Gorbik , Christian Borntraeger , Sven Schnelle , x86@kernel.org, Jiri Pirko , Michael Kelley Subject: Re: [PATCH v7 13/22] dma: swiotlb: track pool encryption state and honor DMA_ATTR_CC_SHARED Message-ID: <20260713192502.GS3133966@ziepe.ca> References: <20260701054926.825925-1-aneesh.kumar@kernel.org> <20260701054926.825925-14-aneesh.kumar@kernel.org> Precedence: bulk X-Mailing-List: linux-coco@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260701054926.825925-14-aneesh.kumar@kernel.org> On Wed, Jul 01, 2026 at 11:19:17AM +0530, Aneesh Kumar K.V (Arm) wrote: > Teach swiotlb to distinguish between encrypted and decrypted bounce > buffer pools, and make allocation and mapping paths select a pool whose > state matches the requested DMA attributes. > > Add a cc_shared flag to io_tlb_mem, initialize it for the default and > restricted pools, and propagate __DMA_ATTR_ALLOC_CC_SHARED into swiotlb > pool allocation. Reject swiotlb alloc/map requests when the selected pool > does not match the required encrypted/decrypted state. > > Also return DMA addresses with the matching phys_to_dma_{encrypted, > unencrypted} helper so the DMA address encoding stays consistent with the > chosen pool. > > Tested-by: Jiri Pirko > Tested-by: Michael Kelley > Tested-by: Mostafa Saleh > Signed-off-by: Aneesh Kumar K.V (Arm) > --- > include/linux/dma-direct.h | 10 +++ > include/linux/swiotlb.h | 10 ++- > kernel/dma/direct.c | 13 ++- > kernel/dma/swiotlb.c | 177 ++++++++++++++++++++++++++++--------- > 4 files changed, 162 insertions(+), 48 deletions(-) Reviewed-by: Jason Gunthorpe Jason