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Tue, 18 Aug 2026 06:26:59 +0000 Message-ID: <6400d112-4637-4bc2-8948-43c18c90d7ec@siemens.com> Date: Tue, 18 Aug 2026 08:26:58 +0200 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 5/5] kernel: use architecture specific names for kernels To: Felix Moessbauer , isar-users@googlegroups.com References: <20260817113420.750731-1-felix.moessbauer@siemens.com> <20260817113420.750731-6-felix.moessbauer@siemens.com> From: "'Jan Kiszka' via isar-users" Content-Language: en-US Autocrypt: addr=jan.kiszka@siemens.com; keydata= xsFNBGZY+hkBEACkdtFD81AUVtTVX+UEiUFs7ZQPQsdFpzVmr6R3D059f+lzr4Mlg6KKAcNZ uNUqthIkgLGWzKugodvkcCK8Wbyw+1vxcl4Lw56WezLsOTfu7oi7Z0vp1XkrLcM0tofTbClW xMA964mgUlBT2m/J/ybZd945D0wU57k/smGzDAxkpJgHBrYE/iJWcu46jkGZaLjK4xcMoBWB I6hW9Njxx3Ek0fpLO3876bszc8KjcHOulKreK+ezyJ01Hvbx85s68XWN6N2ulLGtk7E/sXlb 79hylHy5QuU9mZdsRjjRGJb0H9Buzfuz0XrcwOTMJq7e7fbN0QakjivAXsmXim+s5dlKlZjr L3ILWte4ah7cGgqc06nFb5jOhnGnZwnKJlpuod3pc/BFaFGtVHvyoRgxJ9tmDZnjzMfu8YrA +MVv6muwbHnEAeh/f8e9O+oeouqTBzgcaWTq81IyS56/UD6U5GHet9Pz1MB15nnzVcyZXIoC roIhgCUkcl+5m2Z9G56bkiUcFq0IcACzjcRPWvwA09ZbRHXAK/ao/+vPAIMnU6OTx3ejsbHn oh6VpHD3tucIt+xA4/l3LlkZMt5FZjFdkZUuAVU6kBAwElNBCYcrrLYZBRkSGPGDGYZmXAW/ VkNUVTJkRg6MGIeqZmpeoaV2xaIGHBSTDX8+b0c0hT/Bgzjv8QARAQABzSNKYW4gS2lzemth IDxqYW4ua2lzemthQHNpZW1lbnMuY29tPsLBlAQTAQoAPhYhBABMZH11cs99cr20+2mdhQqf QXvYBQJmWPvXAhsDBQkFo5qABQsJCAcCBhUKCQgLAgQWAgMBAh4BAheAAAoJEGmdhQqfQXvY zPAP/jGiVJ2VgPcRWt2P8FbByfrJJAPCsos+SZpncRi7tl9yTEpS+t57h7myEKPdB3L+kxzg K3dt1UhYp4FeIHA3jpJYaFvD7kNZJZ1cU55QXrJI3xu/xfB6VhCs+VAUlt7XhOsOmTQqCpH7 pRcZ5juxZCOxXG2fTQTQo0gfF5+PQwQYUp0NdTbVox5PTx5RK3KfPqmAJsBKdwEaIkuY9FbM 9lGg8XBNzD2R/13cCd4hRrZDtyegrtocpBAruVqOZhsMb/h7Wd0TGoJ/zJr3w3WnDM08c+RA 5LHMbiA29MXq1KxlnsYDfWB8ts3HIJ3ROBvagA20mbOm26ddeFjLdGcBTrzbHbzCReEtN++s gZneKsYiueFDTxXjUOJgp8JDdVPM+++axSMo2js8TwVefTfCYt0oWMEqlQqSqgQwIuzpRO6I ik7HAFq8fssy2cY8Imofbj77uKz0BNZC/1nGG1OI9cU2jHrqsn1i95KaS6fPu4EN6XP/Gi/O 0DxND+HEyzVqhUJkvXUhTsOzgzWAvW9BlkKRiVizKM6PLsVm/XmeapGs4ir/U8OzKI+SM3R8 VMW8eovWgXNUQ9F2vS1dHO8eRn2UqDKBZSo+qCRWLRtsqNzmU4N0zuGqZSaDCvkMwF6kIRkD ZkDjjYQtoftPGchLBTUzeUa2gfOr1T4xSQUHhPL8zsFNBGZY+hkBEADb5quW4M0eaWPIjqY6 aC/vHCmpELmS/HMa5zlA0dWlxCPEjkchN8W4PB+NMOXFEJuKLLFs6+s5/KlNok/kGKg4fITf Vcd+BQd/YRks3qFifckU+kxoXpTc2bksTtLuiPkcyFmjBph/BGms35mvOA0OaEO6fQbauiHa QnYrgUQM+YD4uFoQOLnWTPmBjccoPuiJDafzLxwj4r+JH4fA/4zzDa5OFbfVq3ieYGqiBrtj tBFv5epVvGK1zoQ+Rc+h5+dCWPwC2i3cXTUVf0woepF8mUXFcNhY+Eh8vvh1lxfD35z2CJeY txMcA44Lp06kArpWDjGJddd+OTmUkFWeYtAdaCpj/GItuJcQZkaaTeiHqPPrbvXM361rtvaw XFUzUlvoW1Sb7/SeE/BtWoxkeZOgsqouXPTjlFLapvLu5g9MPNimjkYqukASq/+e8MMKP+EE v3BAFVFGvNE3UlNRh+ppBqBUZiqkzg4q2hfeTjnivgChzXlvfTx9M6BJmuDnYAho4BA6vRh4 Dr7LYTLIwGjguIuuQcP2ENN+l32nidy154zCEp5/Rv4K8SYdVegrQ7rWiULgDz9VQWo2zAjo TgFKg3AE3ujDy4V2VndtkMRYpwwuilCDQ+Bpb5ixfbFyZ4oVGs6F3jhtWN5Uu43FhHSCqUv8 FCzl44AyGulVYU7hTQARAQABwsF8BBgBCgAmFiEEAExkfXVyz31yvbT7aZ2FCp9Be9gFAmZY +hkCGwwFCQWjmoAACgkQaZ2FCp9Be9hN3g/8CdNqlOfBZGCFNZ8Kf4tpRpeN3TGmekGRpohU bBMvHYiWW8SvmCgEuBokS+Lx3pyPJQCYZDXLCq47gsLdnhVcQ2ZKNCrr9yhrj6kHxe1Sqv1S MhxD8dBqW6CFe/mbiK9wEMDIqys7L0Xy/lgCFxZswlBW3eU2Zacdo0fDzLiJm9I0C9iPZzkJ gITjoqsiIi/5c3eCY2s2OENL9VPXiH1GPQfHZ23ouiMf+ojVZ7kycLjz+nFr5A14w/B7uHjz uL6tnA+AtGCredDne66LSK3HD0vC7569sZ/j8kGKjlUtC+zm0j03iPI6gi8YeCn9b4F8sLpB lBdlqo9BB+uqoM6F8zMfIfDsqjB0r/q7WeJaI8NKfFwNOGPuo93N+WUyBi2yYCXMOgBUifm0 T6Hbf3SHQpbA56wcKPWJqAC2iFaxNDowcJij9LtEqOlToCMtDBekDwchRvqrWN1mDXLg+av8 qH4kDzsqKX8zzTzfAWFxrkXA/kFpR3JsMzNmvextkN2kOLCCHkym0zz5Y3vxaYtbXG2wTrqJ 8WpkWIE8STUhQa9AkezgucXN7r6uSrzW8IQXxBInZwFIyBgM0f/fzyNqzThFT15QMrYUqhhW ZffO4PeNJOUYfXdH13A6rbU0y6xE7Okuoa01EqNi9yqyLA8gPgg/DhOpGtK8KokCsdYsTbk= In-Reply-To: <20260817113420.750731-6-felix.moessbauer@siemens.com> Content-Type: text/plain; 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dkim=pass header.i=@siemens.com header.s=selector2 header.b=pGfbr6Af; arc=pass (i=1 spf=pass spfdomain=siemens.com dkim=pass dkdomain=siemens.com dmarc=pass fromdomain=siemens.com); spf=pass (google.com: domain of jan.kiszka@siemens.com designates 2a01:111:f403:c20f::7 as permitted sender) smtp.mailfrom=jan.kiszka@siemens.com; dmarc=pass (p=REJECT sp=REJECT dis=NONE) header.from=siemens.com X-Original-From: Jan Kiszka Reply-To: Jan Kiszka Precedence: list Mailing-list: list isar-users@googlegroups.com; contact isar-users+owners@googlegroups.com List-ID: X-Spam-Checked-In-Group: isar-users@googlegroups.com X-Google-Group-Id: 914930254986 List-Post: , List-Help: , List-Archive: , List-Unsubscribe: , X-Spam-Status: No, score=-4.9 required=5.0 tests=DKIMWL_WL_MED,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,MAILING_LIST_MULTI, RCVD_IN_DNSWL_BLOCKED,RCVD_IN_MSPIKE_H2,RCVD_IN_RP_CERTIFIED, RCVD_IN_RP_RNBL,RCVD_IN_RP_SAFE,SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.2 X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on shymkent.ilbers.de X-TUID: cTCQQhaArTz1 On 17.08.26 13:34, Felix Moessbauer wrote: > The kernel source packages are architecture specific. By that, we also > have to encode the architecture in the KERNEL_NAME, if that is not > already implicitly the case (e.g. when building a kernel for a specific > machine). Same feedback as on patch 3. > > For the kernel recipes which are generic (like mainline and cip), we > simply extend the PN with -${DISTRO_ARCH}, so bitbake can find the > dependency and instanciate an architecture specific variant. > > By that, we also need to adapt the default in test_per_kernel, which > explicitly builds the module for the kernel that corresponds to the > multiconfig target. > > Signed-off-by: Felix Moessbauer > --- > RECIPE-API-CHANGELOG.md | 3 +++ > doc/user_manual.md | 13 ++++++++++++- > meta-isar/conf/machine/beagleplay.conf | 2 +- > meta-isar/conf/machine/de0-nano-soc.conf | 2 +- > meta-isar/conf/machine/hikey.conf | 2 +- > meta-isar/conf/machine/qemuamd64-cip.conf | 2 +- > meta-isar/conf/machine/sifive-fu540.conf | 2 +- > meta-isar/conf/machine/stm32mp15x.conf | 2 +- > .../recipes-kernel/linux/linux-cip_4.4.166-cip29.bb | 2 ++ > .../recipes-kernel/linux/linux-mainline_6.12.85.bb | 2 ++ > testsuite/citest.py | 2 +- > 11 files changed, 26 insertions(+), 8 deletions(-) > > diff --git a/RECIPE-API-CHANGELOG.md b/RECIPE-API-CHANGELOG.md > index 2db05169..15b47cce 100644 > --- a/RECIPE-API-CHANGELOG.md > +++ b/RECIPE-API-CHANGELOG.md > @@ -1175,6 +1175,9 @@ DPKG_ARCH ?= "${DISTRO_ARCH}" > > Firmware packages are an exception because they are built for only one architecture. > > +**Note**: This rule also applies to kernel packages. Set `KERNEL_NAME` to an > +architecture- or machine-specific name, as appropriate. > + Here, you actually exand on the specifics. Maybe add that operation mode (debug vs. production config) as another variation example so that people realize what they are doing when customizing the kernel recipes. Can be more than two sentences if needed. Jan > ### Add Hyper-V machine support > > A new machine `hyper-v` has been introduced for building images > diff --git a/doc/user_manual.md b/doc/user_manual.md > index dcc3f560..cb47c157 100644 > --- a/doc/user_manual.md > +++ b/doc/user_manual.md > @@ -628,11 +628,22 @@ For example, in your machine configuration: > > ```bitbake > KERNEL_NAME = "armmp" > -KERNEL_NAMES = "armmp mainline" > +KERNEL_NAMES = "armmp mainline-arm64" > ``` > > When `KERNEL_NAMES` is set, recipes inheriting the `per-kernel` class will generate variants for each listed kernel. Installation of each must be explicitly handled in the image. > > +Kernel source packages contain architecture-specific content. Therefore, builds > +for multiple architectures must publish source packages with distinct names. > +For a kernel built for only one target, the name may remain unchanged. > + > +Generic kernel recipes can append `${DISTRO_ARCH}` to `PN`, to provide the > +kernel for all architectures. > + > +``` > +PN .= "-${DISTRO_ARCH}" > +``` > + > --- > > ## Add a New Image > diff --git a/meta-isar/conf/machine/beagleplay.conf b/meta-isar/conf/machine/beagleplay.conf > index d030256d..8cefd939 100644 > --- a/meta-isar/conf/machine/beagleplay.conf > +++ b/meta-isar/conf/machine/beagleplay.conf > @@ -5,7 +5,7 @@ > > DISTRO_ARCH ?= "arm64" > > -KERNEL_NAME ?= "mainline" > +KERNEL_NAME ?= "mainline-${DISTRO_ARCH}" > > IMAGE_FSTYPES ?= "wic" > WKS_FILE ?= "beagleplay.wks.in" > diff --git a/meta-isar/conf/machine/de0-nano-soc.conf b/meta-isar/conf/machine/de0-nano-soc.conf > index 78f841df..7059822a 100644 > --- a/meta-isar/conf/machine/de0-nano-soc.conf > +++ b/meta-isar/conf/machine/de0-nano-soc.conf > @@ -5,7 +5,7 @@ > > DISTRO_ARCH ?= "armhf" > > -KERNEL_NAME ?= "mainline" > +KERNEL_NAME ?= "mainline-${DISTRO_ARCH}" > > U_BOOT_CONFIG:de0-nano-soc = "socfpga_de0_nano_soc_defconfig" > U_BOOT_BIN:de0-nano-soc = "u-boot-with-spl.sfp" > diff --git a/meta-isar/conf/machine/hikey.conf b/meta-isar/conf/machine/hikey.conf > index 019e1910..1e696b4d 100644 > --- a/meta-isar/conf/machine/hikey.conf > +++ b/meta-isar/conf/machine/hikey.conf > @@ -5,7 +5,7 @@ > > DISTRO_ARCH = "arm64" > > -KERNEL_NAME ?= "mainline" > +KERNEL_NAME ?= "mainline-${DISTRO_ARCH}" > > IMAGE_FSTYPES = "wic" > WKS_FILE ?= "hikey" > diff --git a/meta-isar/conf/machine/qemuamd64-cip.conf b/meta-isar/conf/machine/qemuamd64-cip.conf > index e7eaa2d6..9d633362 100644 > --- a/meta-isar/conf/machine/qemuamd64-cip.conf > +++ b/meta-isar/conf/machine/qemuamd64-cip.conf > @@ -5,4 +5,4 @@ > > include conf/machine/qemuamd64.conf > > -KERNEL_NAME = "cip" > +KERNEL_NAME = "cip-${DISTRO_ARCH}" > diff --git a/meta-isar/conf/machine/sifive-fu540.conf b/meta-isar/conf/machine/sifive-fu540.conf > index c9bbc57b..07846f99 100644 > --- a/meta-isar/conf/machine/sifive-fu540.conf > +++ b/meta-isar/conf/machine/sifive-fu540.conf > @@ -5,7 +5,7 @@ > > DISTRO_ARCH = "riscv64" > > -KERNEL_NAME ?= "mainline" > +KERNEL_NAME ?= "mainline-${DISTRO_ARCH}" > > IMAGE_FSTYPES ?= "wic" > WKS_FILE ?= "sifive-fu540" > diff --git a/meta-isar/conf/machine/stm32mp15x.conf b/meta-isar/conf/machine/stm32mp15x.conf > index 7aa410a5..aa453d8f 100644 > --- a/meta-isar/conf/machine/stm32mp15x.conf > +++ b/meta-isar/conf/machine/stm32mp15x.conf > @@ -5,7 +5,7 @@ > > DISTRO_ARCH ?= "armhf" > > -KERNEL_NAME ?= "mainline" > +KERNEL_NAME ?= "mainline-${DISTRO_ARCH}" > > U_BOOT_CONFIG:stm32mp15x = "stm32mp15_trusted_defconfig" > U_BOOT_BIN:stm32mp15x = "u-boot.stm32" > diff --git a/meta-isar/recipes-kernel/linux/linux-cip_4.4.166-cip29.bb b/meta-isar/recipes-kernel/linux/linux-cip_4.4.166-cip29.bb > index e2775c8d..bb196b5a 100644 > --- a/meta-isar/recipes-kernel/linux/linux-cip_4.4.166-cip29.bb > +++ b/meta-isar/recipes-kernel/linux/linux-cip_4.4.166-cip29.bb > @@ -5,6 +5,8 @@ > # > # SPDX-License-Identifier: MIT > > +PN .= "-${DISTRO_ARCH}" > + > inherit linux-kernel > > SRC_URI += " \ > diff --git a/meta-isar/recipes-kernel/linux/linux-mainline_6.12.85.bb b/meta-isar/recipes-kernel/linux/linux-mainline_6.12.85.bb > index 11b90127..13c694b0 100644 > --- a/meta-isar/recipes-kernel/linux/linux-mainline_6.12.85.bb > +++ b/meta-isar/recipes-kernel/linux/linux-mainline_6.12.85.bb > @@ -5,4 +5,6 @@ > # > # SPDX-License-Identifier: MIT > > +PN .= "-${DISTRO_ARCH}" > + > require recipes-kernel/linux/linux-mainline.inc > diff --git a/testsuite/citest.py b/testsuite/citest.py > index f5d54904..c2ac144a 100644 > --- a/testsuite/citest.py > +++ b/testsuite/citest.py > @@ -627,7 +627,7 @@ class KernelTests(CIBaseTest): > """Test per-kernel recipe variants for external kernel modules.""" > > targets = ['mc:qemuarm64-bookworm:isar-image-ci'] > - kernel_names = self.params.get('kernel_names', default='mainline') > + kernel_names = self.params.get('kernel_names', default='mainline-arm64') > kernel_names = [k.strip() for k in kernel_names.split(',') if k.strip()] > modules = [f"example-module-{k}" for k in kernel_names] > modules.append('example-module-${KERNEL_NAME}') -- Siemens AG, Foundational Technologies Linux Expert Center -- You received this message because you are subscribed to the Google Groups "isar-users" group. 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