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([2001:b07:2ec:601d:4b26:1672:75c7:805a]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-47aa0f21328sm35142014f8f.32.2026.07.07.08.04.47 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 07 Jul 2026 08:04:48 -0700 (PDT) Message-ID: <6acf86dc-0df0-492a-b3dc-224a666214b9@gmail.com> Date: Tue, 7 Jul 2026 17:04:46 +0200 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH RFC 01/13] iommu: arm-smmu-qcom: Configure lpac device with split address space To: Dmitry Baryshkov Cc: Rob Clark , Will Deacon , Robin Murphy , Joerg Roedel , Sean Paul , Konrad Dybcio , Akhil P Oommen , Dmitry Baryshkov , Abhinav Kumar , Jessica Zhang , Marijn Suijten , David Airlie , Simona Vetter , Bjorn Andersson , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , iommu@lists.linux.dev, linux-arm-msm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, freedreno@lists.freedesktop.org, devicetree@vger.kernel.org References: <20260705-descriptive-name-lpac-upstream-v1-0-01d50c3e0c99@gmail.com> <20260705-descriptive-name-lpac-upstream-v1-1-01d50c3e0c99@gmail.com> <5vfdbrk4bu77e7wgutp4h3ilbpjhcxxnwemqiufmtiwoffp4sl@oaonwwouw4qm> Content-Language: en-US From: Anna Maniscalco In-Reply-To: <5vfdbrk4bu77e7wgutp4h3ilbpjhcxxnwemqiufmtiwoffp4sl@oaonwwouw4qm> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 7/6/26 5:00 PM, Dmitry Baryshkov wrote: > On Sun, Jul 05, 2026 at 09:13:35PM +0200, Anna Maniscalco wrote: >> We want the context bank used by LPAC to use split address space just >> like GFX. > Why? I'll update the commit message in the next revision. The reason is the same as GFX, we want split kernel and user address spaces so we can use per context page tables for userspace submissions. > >> Signed-off-by: Anna Maniscalco >> --- >> drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c | 11 ++++++++--- >> 1 file changed, 8 insertions(+), 3 deletions(-) >> Best regards, -- Anna Maniscalco