From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-vk1-f169.google.com (mail-vk1-f169.google.com [209.85.221.169]) (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 EF1133DE427 for ; Tue, 28 Apr 2026 13:33:27 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.221.169 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777383209; cv=none; b=XBlEOVXR3fwGav5vez5nauIN+8G7qjX06zaO9Wy4Hb926bRb+ZCK6jL8J+7GEIJCeV1lTlukrkaQvgEAmEZA8UetmqfxXybh1mPq22RwNcQV4RM0yQynGccHBpmblfyKzwNceISettKuQu8RAGKXd/euEejtAv/DxHwnUL69EtQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777383209; c=relaxed/simple; bh=1IqsjiAX0vwjSWriiKDOdVjW11E6rCLofzR5yUGyvCg=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=MdETRXCGHt5D8fmRZ89ppntozY3YraI32BKQ7f0G7aIQsVMVDij+vnRXqUVCwjjuXX9Lrvd9UnFKFqA84J0dGPZx1vHABwtm+ekW11Y2SGEeQR6S/fxK8WqoPzvwzjhFGGnyQ94wWLxL2g73+FYKZPIxAtyCe1OIxLHxbGRevRU= 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=Nxkxp094; arc=none smtp.client-ip=209.85.221.169 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="Nxkxp094" Received: by mail-vk1-f169.google.com with SMTP id 71dfb90a1353d-56d89f35940so3724254e0c.2 for ; Tue, 28 Apr 2026 06:33:27 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ziepe.ca; s=google; t=1777383207; x=1777988007; darn=vger.kernel.org; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:from:to:cc:subject:date:message-id:reply-to; bh=OngaHwDgRXU8aplL5gx6iXCqNmM7ax8JTAiWS4ELs6M=; b=Nxkxp094YJGDwd1xJ4nWVewihgoog7LNbia1N51A3GzMSp39hjqWf8b5BoAfgaIO3Y 85bGhN5TWXCQD58+yXVhVorrc4UsreRPqOljBRx3dLxwzeLVpW++lTGHFvDVQCdleOgt M7ECTTCPXb0V8GqYguAHK31EkegTixul5T2o0YVi9ICCVs5GcQbBrOaEBYvAhq7BIbEU ZYJL+zP/dr9jBvb8+pOI89fH476qMLJRaUSHhhYZBwCpDS8j0T1XxkMfBw4QR1BPpUQ7 pD0nWwBsiZMLwiWPi2TjQEnioa8w6BMoyOBun2/9dTOyF7t5tDWYFWtUNL2C9iMjNepT 18nA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1777383207; x=1777988007; h=in-reply-to:content-disposition: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; bh=OngaHwDgRXU8aplL5gx6iXCqNmM7ax8JTAiWS4ELs6M=; b=oAO8lMzs2uhxEW9gmZVoN0HTh6ROOhfM/oFohiBdLMdBu3cc8OkGE7QlhbWOsv1CiA k6lDpjuQ8VTP1yf0AZuK94Tl7qOHcNjIOy2u8OfdPjw+eEuOAbV1ToQJCDGR5nn5dcxR m2lyMEk4RPzS8B5jh5hDCqjiUlTO4PcgzCDvKLqfb6SQLxv9xSZSNTDj6R3JQdPk7jBq ofMkBjY+4ViMjnAhUKvz6UY/1bU782r7MfXunerYSB/6am2tiN9RfFdCahxK0WICK6NA Xzx4rGnEwketEETZfl/ZV8YnasO24mGhWJFKkKq1F8b9rZzsnvE39VKv0zfKSk0ioPBB 7ZMg== X-Forwarded-Encrypted: i=1; AFNElJ+mz8AAAtak4myaRbCMpbjvNB+VBOMxPNK0KM/tfJl9RvFOBf5yVFT6LJRBS8pUQ3MkWfJGloS8P+Zje2I=@vger.kernel.org X-Gm-Message-State: AOJu0Yz+t2VhQw2UmQhiSZi5tj9sp+a/PbiEi8cUYnqxRaIelk7E86Nj WcrJh/2568Zpx4ZISuL1kCVIhFZcx7uKH2c7Y4eGPN9/p+s/aQQczj5TqNIim1IGHuQ= X-Gm-Gg: AeBDieu2g9R5Uc53BM0ucZcBypHS3RGV8a6wLdcmbimz3V1Lv4ijxnMjmIPulSiv1nD /Dfm8SlzFgqO/H0Qm2zHrvYrPXp9RN60i1pobzZ+hZYY++nciTynZ4YCv/jmCsJ04S+LzgRxp7C lO4GdnXL8RBQQyy4EqOuNevbzUn/MWNCdZzm9ZcyyY3hIa2t7MCz8ACbTtgtSsQhjeTAKkFfF32 pwQP/a5CFi8JBN3pv3/7o8RL5/T+u9TnlisvUw6UH1hUgqt2qRmcWixwFpKJBbPt0IOgaBc0w9n lnkWAJXinA0oQF0dLR42lXy+/DhQIzgxaiteIiJGENgEzYQVnxV5TVkaBZiHFYtr3rC408hRE4U 642PHII1F3rk6ppaDJkGhf2C3ia5Fd/PLvX3wM1xKFf3rFFuGv8Tb80Xn8JeONTTI0VmMuo7zr6 6++SfZNqaJy63WXoZoWFaAK9RI1Uc2YLa0x9Eo2EvouHyU2uvqRlPKVwu58PfCFw70T5rVZyY0p Fc3Zi9TqCUl6VF7 X-Received: by 2002:a05:6102:f09:b0:607:4fe2:a647 with SMTP id ada2fe7eead31-6280afc7cc0mr1065240137.21.1777383206848; Tue, 28 Apr 2026 06:33:26 -0700 (PDT) Received: from ziepe.ca (crbknf0213w-47-54-130-67.pppoe-dynamic.high-speed.nl.bellaliant.net. [47.54.130.67]) by smtp.gmail.com with ESMTPSA id 6a1803df08f44-8b3e2842bbbsm19645216d6.11.2026.04.28.06.33.25 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 28 Apr 2026 06:33:25 -0700 (PDT) Received: from jgg by wakko with local (Exim 4.97) (envelope-from ) id 1wHiZ2-0000000AhmN-3Msg; Tue, 28 Apr 2026 10:33:24 -0300 Date: Tue, 28 Apr 2026 10:33:24 -0300 From: Jason Gunthorpe To: fangyu.yu@linux.alibaba.com Cc: joro@8bytes.org, will@kernel.org, robin.murphy@arm.com, pjw@kernel.org, palmer@dabbelt.com, aou@eecs.berkeley.edu, alex@ghiti.fr, tjeznach@rivosinc.com, kevin.tian@intel.com, baolu.lu@linux.intel.com, vasant.hegde@amd.com, anup@brainfault.org, atish.patra@linux.dev, skhawaja@google.com, guoren@kernel.org, kvm@vger.kernel.org, iommu@lists.linux.dev, kvm-riscv@lists.infradead.org, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org Subject: Re: [RFC PATCH 02/11] iommu/riscv: report iommu capabilities Message-ID: <20260428133324.GD849557@ziepe.ca> References: <20260428131359.34872-1-fangyu.yu@linux.alibaba.com> <20260428131359.34872-3-fangyu.yu@linux.alibaba.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260428131359.34872-3-fangyu.yu@linux.alibaba.com> On Tue, Apr 28, 2026 at 09:13:50PM +0800, fangyu.yu@linux.alibaba.com wrote: > +static bool riscv_iommu_capable(struct device *dev, enum iommu_cap cap) > +{ > + switch (cap) { > + case IOMMU_CAP_CACHE_COHERENCY: > + case IOMMU_CAP_DEFERRED_FLUSH: IOMMU_CAP_DEFERRED_FLUSH is not needed in v7.1 Jason