From: Mark Brown <broonie@kernel.org> To: Catalin Marinas <catalin.marinas@arm.com>, Will Deacon <will@kernel.org>, Nathan Chancellor <nathan@kernel.org>, Nick Desaulniers <ndesaulniers@google.com>, Nicolas Schier <nicolas@fjasle.eu>, soc@kernel.org, Masahiro Yamada <masahiroy@kernel.org> Cc: Mark Rutland <mark.rutland@arm.com>, Peter Zijlstra <peterz@infradead.org>, linux-arm-kernel@lists.infradead.org, linux-kbuild@vger.kernel.org, linux-kernel@vger.kernel.org, Mark Brown <broonie@kernel.org> Subject: [PATCH 0/3] arm64: configs: Provide slimmed down configuration for guests Date: Fri, 10 Feb 2023 19:52:46 +0000 [thread overview] Message-ID: <20230203-arm64-defconfigs-v1-0-cd0694a05f13@kernel.org> (raw) It has been noted that due to the extensive platform support it enables the arm64 defconfig is rather large and takes a while to build in comparison with other architectures which can be a burden when doing cross architecture work, especially when testing is mainly in emulation. We can mitigate this by providing a configuration that only enables the support required to run in mach-virt, this will be much smaller and quicker to build. Having two completely separate configurations would mean that we'd need to make any changes to the architecture wide configuration in both the existing defconfig and the new configuration if we wanted to ensure consistent default behaviour. Instead define a new config fragement which turns off options from defconfig which enable platform support, currently this just covers the ARCH_ options that control SoC specific drivers as validation for this approach - if people are happy with this approach we can build on it to further reduce the size of the new configuration. The resulting configuration builds about 25% faster for me. v2: - Rework to base on turning off options from defconfig rather than splitting out a base configuration and then adding things to it. Signed-off-by: Mark Brown <broonie@kernel.org> --- Mark Brown (3): scripts: merge_config: Add option to suppress warning on overrides kbuild: Provide a version of merge_into_defconfig without override warnings arm64: configs: Add virtconfig arch/arm64/Makefile | 6 ++++++ arch/arm64/configs/virt.config | 39 +++++++++++++++++++++++++++++++++++++++ scripts/Makefile.defconf | 14 ++++++++++++++ scripts/kconfig/merge_config.sh | 25 ++++++++++++++++--------- 4 files changed, 75 insertions(+), 9 deletions(-) --- base-commit: 4fafd96910add124586b549ad005dcd179de8a18 change-id: 20230203-arm64-defconfigs-c04cf5fa6288 Best regards, -- Mark Brown <broonie@kernel.org>
WARNING: multiple messages have this Message-ID (diff)
From: Mark Brown <broonie@kernel.org> To: Catalin Marinas <catalin.marinas@arm.com>, Will Deacon <will@kernel.org>, Nathan Chancellor <nathan@kernel.org>, Nick Desaulniers <ndesaulniers@google.com>, Nicolas Schier <nicolas@fjasle.eu>, soc@kernel.org, Masahiro Yamada <masahiroy@kernel.org> Cc: Mark Rutland <mark.rutland@arm.com>, Peter Zijlstra <peterz@infradead.org>, linux-arm-kernel@lists.infradead.org, linux-kbuild@vger.kernel.org, linux-kernel@vger.kernel.org, Mark Brown <broonie@kernel.org> Subject: [PATCH 0/3] arm64: configs: Provide slimmed down configuration for guests Date: Fri, 10 Feb 2023 19:52:46 +0000 [thread overview] Message-ID: <20230203-arm64-defconfigs-v1-0-cd0694a05f13@kernel.org> (raw) It has been noted that due to the extensive platform support it enables the arm64 defconfig is rather large and takes a while to build in comparison with other architectures which can be a burden when doing cross architecture work, especially when testing is mainly in emulation. We can mitigate this by providing a configuration that only enables the support required to run in mach-virt, this will be much smaller and quicker to build. Having two completely separate configurations would mean that we'd need to make any changes to the architecture wide configuration in both the existing defconfig and the new configuration if we wanted to ensure consistent default behaviour. Instead define a new config fragement which turns off options from defconfig which enable platform support, currently this just covers the ARCH_ options that control SoC specific drivers as validation for this approach - if people are happy with this approach we can build on it to further reduce the size of the new configuration. The resulting configuration builds about 25% faster for me. v2: - Rework to base on turning off options from defconfig rather than splitting out a base configuration and then adding things to it. Signed-off-by: Mark Brown <broonie@kernel.org> --- Mark Brown (3): scripts: merge_config: Add option to suppress warning on overrides kbuild: Provide a version of merge_into_defconfig without override warnings arm64: configs: Add virtconfig arch/arm64/Makefile | 6 ++++++ arch/arm64/configs/virt.config | 39 +++++++++++++++++++++++++++++++++++++++ scripts/Makefile.defconf | 14 ++++++++++++++ scripts/kconfig/merge_config.sh | 25 ++++++++++++++++--------- 4 files changed, 75 insertions(+), 9 deletions(-) --- base-commit: 4fafd96910add124586b549ad005dcd179de8a18 change-id: 20230203-arm64-defconfigs-c04cf5fa6288 Best regards, -- Mark Brown <broonie@kernel.org> _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next reply other threads:[~2023-02-10 19:54 UTC|newest] Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top 2023-02-10 19:52 Mark Brown [this message] 2023-02-10 19:52 ` [PATCH 0/3] arm64: configs: Provide slimmed down configuration for guests Mark Brown 2023-02-10 19:52 ` [PATCH 1/3] scripts: merge_config: Add option to suppress warning on overrides Mark Brown 2023-02-10 19:52 ` Mark Brown 2023-02-10 19:52 ` [PATCH 2/3] kbuild: Provide a version of merge_into_defconfig without override warnings Mark Brown 2023-02-10 19:52 ` Mark Brown 2023-02-10 19:52 ` [PATCH 3/3] arm64: configs: Add virtconfig Mark Brown 2023-02-10 19:52 ` Mark Brown 2023-02-11 7:37 ` Masahiro Yamada 2023-02-11 7:37 ` Masahiro Yamada 2023-02-11 23:10 ` Mark Brown 2023-02-11 23:10 ` Mark Brown 2023-02-13 15:15 ` Arnd Bergmann 2023-02-13 15:15 ` Arnd Bergmann 2023-02-13 15:48 ` Mark Brown 2023-02-13 15:48 ` Mark Brown 2023-02-13 16:18 ` Masahiro Yamada 2023-02-13 16:18 ` Masahiro Yamada 2023-02-10 23:51 ` [PATCH 0/3] arm64: configs: Provide slimmed down configuration for guests Mark Brown 2023-02-10 23:51 ` Mark Brown 2023-02-13 19:30 ` patchwork-bot+linux-soc
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