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([186.215.60.20]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2365de781dfsm60848405ad.131.2025.06.16.06.20.20 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 16 Jun 2025 06:20:22 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1750080025; x=1750684825; darn=nongnu.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=D8W/yE99oVdomm0D2Fyb+s9ZavOYJt5IOPZHZYUPXcU=; b=xz4bquyEtDX+kNBcYZ7Ud1ventzV5GmYQ1b0ve+NszrGdYCZs9QT+j9jx1KXKP8u+Y 4/0Uq1StNuDpVQGF/N8zSFl+p7X0s4Qh2Nx4C8t/X1MfujFm6nuoKqrIwqQCuNTkXsIw 9syKBohvboFEvmuHCprmz8LN3t6rD4hMBm6h/zNJjoBbwecGBzIksl+6FdI6lQYRnzbA q1Tuh+zLvlS8f7zApcqB2G2FwPfDNyg/RGIFMVYhssMplPHYEeycYNXgBij4z23QlKRJ 8+zB/okCnhTCdAzhLZojSvlNWcMOFZEyFQkx8uFSvZ9SaV4noGx8W0t5Spmnb/5lO7v+ Ny6w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1750080025; x=1750684825; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=D8W/yE99oVdomm0D2Fyb+s9ZavOYJt5IOPZHZYUPXcU=; b=dTdgtrDwHUM9KavN1ylMqfCJityC9GFcQUa7VccDaYQTDtPGW7paG6kQfa8j4U1Fr2 Tt41hrOdrG961yr6LD8TCcSVCo/oApuaoTkg9PaS+hmuOKP6U0aOaLAc9yHszDSspGWw y6UX1mBrp20hXsbTAoDLiY3kLee5ZaTgF9l0tnOOtJR/mndrYidc+aTKFIyWwvV6u6FC iMspzMzHRTPsDXtop7yZ8sW1K4TNofkoTcvvJw6/sKSGQEiXh2HnC5/fc0Bdm5uRQai1 hJTYxUAmH1SLqurxSzXLbe6HmdMosYZ1eD6jfdkLBr3ulL3/fuVdWljj1VI+Cyzd+s2E C8mg== X-Gm-Message-State: AOJu0Yy+2vrljTNmFCc7hvmtkq2cfQ2Xl19S+MG1pyZxhMqgfAc7oZX1 mf2dmfvawuQlRKRAQzTkKQ99vXBU16O/T9oj1wNsqkK2smZqVCyKN27Rhas2KsRn9c1tRB3b7n6 g/wHN X-Gm-Gg: ASbGncvVKPQaZLC/zlQ4LQER+XwCd+qixN8W+J/wdsr1x9nxohSAq3Yb8tYF3FeF3gA u6z6hP9dhGzn4TqyKZ5ac7wqW+orOmPO1wOp1EotENjCdp/Vdjio0M/YDRq3JQRLxZG/iz64m6f L5HJVo+aghsk9Nayug2xVyvEOKBiBOuDNEXTn0MugO9d5G1/HFPNFro3ar0v3vWzbz57yaIiY2B s/vFoDV0T+lthf8bB5eHkaHTRLZFD5m5DSXhZGIqMkYH7x6VArOsADkw922SaiMpsrmnl5qLhG8 PELzx6lmYokPp43Duwk18fTQuzZVIM13UVdKOLhW0LY6HwLq2iqCBCxfmGpEP6qy5PrrsxoaBF8 wQA== X-Google-Smtp-Source: AGHT+IFaHruaonQo5WTISuUKEmzod1ppAIC6mFjlggBADfSPAlO2iVq41L/proSl6+ZD/e9QDYYkgw== X-Received: by 2002:a17:903:1a8d:b0:235:f18f:2911 with SMTP id d9443c01a7336-2366afd3873mr149900765ad.2.1750080023418; Mon, 16 Jun 2025 06:20:23 -0700 (PDT) From: Gustavo Romero To: qemu-devel@nongnu.org, eric.auger@redhat.com, philmd@linaro.org, mst@redhat.com Cc: qemu-arm@nongnu.org, alex.bennee@linaro.org, gustavo.romero@linaro.org, udo@hypervisor.org, ajones@ventanamicro.com, peter.maydell@linaro.org, imammedo@redhat.com, anisinha@redhat.com Subject: [PATCH v4 4/8] hw/arm/virt-acpi-build: Fix comment in build_iort Date: Mon, 16 Jun 2025 13:18:20 +0000 Message-Id: <20250616131824.425315-5-gustavo.romero@linaro.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20250616131824.425315-1-gustavo.romero@linaro.org> References: <20250616131824.425315-1-gustavo.romero@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2607:f8b0:4864:20::52a; envelope-from=gustavo.romero@linaro.org; helo=mail-pg1-x52a.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @linaro.org) X-ZM-MESSAGEID: 1750080081465116600 Content-Type: text/plain; charset="utf-8" The comment about the mapping from SMMU to ITS is incorrect and it reads "RC -> ITS". The code in question actually maps SMMU -> ITS, so the mapping in question is not direct. The direct mapping, i.e., RC -> ITS, is handled a bit further down in the code, in the else block, and we take the opportunity to update that as well, adding "RC -> ITS" to the text so it's easier to see it's the direct map to the ITS Group node. Signed-off-by Gustavo Romero --- hw/arm/virt-acpi-build.c | 14 +++++++++----- 1 file changed, 9 insertions(+), 5 deletions(-) diff --git a/hw/arm/virt-acpi-build.c b/hw/arm/virt-acpi-build.c index 9eee284c80..6990bce3bb 100644 --- a/hw/arm/virt-acpi-build.c +++ b/hw/arm/virt-acpi-build.c @@ -407,23 +407,27 @@ build_iort(GArray *table_data, BIOSLinker *linker, Vi= rtMachineState *vms) if (vms->iommu =3D=3D VIRT_IOMMU_SMMUV3) { AcpiIortIdMapping *range; =20 - /* translated RIDs connect to SMMUv3 node: RC -> SMMUv3 -> ITS */ + /* Map RIDs (input) from RC to SMMUv3 nodes: RC -> SMMUv3. */ for (i =3D 0; i < smmu_idmaps->len; i++) { range =3D &g_array_index(smmu_idmaps, AcpiIortIdMapping, i); - /* output IORT node is the smmuv3 node */ + /* Output IORT node is the SMMUv3 node. */ build_iort_id_mapping(table_data, range->input_base, range->id_count, smmu_offset); } =20 - /* bypassed RIDs connect to ITS group node directly: RC -> ITS */ + /* Map DeviceIDs (input) from SMMUv3 to ITS Group nodes: SMMU -> I= TS. */ for (i =3D 0; i < its_idmaps->len; i++) { range =3D &g_array_index(its_idmaps, AcpiIortIdMapping, i); - /* output IORT node is the ITS group node (the first node) */ + /* Output IORT node is the ITS Group node (the first node). */ build_iort_id_mapping(table_data, range->input_base, range->id_count, IORT_NODE_OFFSET); } } else { - /* output IORT node is the ITS group node (the first node) */ + /* + * Map bypassed RIDs (input) (don't go through the SMMU) to ITS Gr= oup + * nodes: RC -> ITS. + * Output IORT node is the ITS Group node (the first node). + */ build_iort_id_mapping(table_data, 0, 0x10000, IORT_NODE_OFFSET); } =20 --=20 2.34.1