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[47.54.130.67]) by smtp.gmail.com with ESMTPSA id af79cd13be357-8ddb5f89d88sm426412085a.4.2026.04.11.05.47.18 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 11 Apr 2026 05:47:18 -0700 (PDT) Received: from jgg by wakko with local (Exim 4.97) (envelope-from ) id 1wBXk5-00000002Xff-27WZ; Sat, 11 Apr 2026 09:47:17 -0300 Date: Sat, 11 Apr 2026 09:47:17 -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, guoren@kernel.org, iommu@lists.linux.dev, kvm-riscv@lists.infradead.org, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 1/2] iommu/riscv: Advertise Svpbmt support to generic page table Message-ID: <20260411124717.GE3694781@ziepe.ca> References: <20260411022223.91029-1-fangyu.yu@linux.alibaba.com> <20260411022223.91029-2-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: <20260411022223.91029-2-fangyu.yu@linux.alibaba.com> On Sat, Apr 11, 2026 at 10:22:22AM +0800, fangyu.yu@linux.alibaba.com wrote: > From: Fangyu Yu > > The RISC-V IOMMU can optionally support Svpbmt page-based memory types > in its page table format. When present,the generic page table code can > use this capability to encode memory attributes (e.g. MMIO vs normal > memory) in PTEs. > > Signed-off-by: Fangyu Yu > --- > drivers/iommu/riscv/iommu.c | 2 ++ > include/linux/generic_pt/common.h | 1 + > 2 files changed, 3 insertions(+) Reviewed-by: Jason Gunthorpe Jason