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Fri, 20 Jan 2023 12:19:15 -0500 (EST) X-Mailer: MessagingEngine.com Webmail Interface User-Agent: Cyrus-JMAP/3.9.0-alpha0-85-gd6d859e0cf-fm-20230116.001-gd6d859e0 Mime-Version: 1.0 Message-Id: <67c572e1-20ca-4ed2-9e15-047341bb338b@app.fastmail.com> In-Reply-To: <20230120133455.3962413-11-alexander.stein@ew.tq-group.com> References: <20230120133455.3962413-1-alexander.stein@ew.tq-group.com> <20230120133455.3962413-11-alexander.stein@ew.tq-group.com> Date: Fri, 20 Jan 2023 18:18:54 +0100 From: "Arnd Bergmann" To: "Alexander Stein" , "Rob Herring" , "Krzysztof Kozlowski" , "Olof Johansson" , "Shawn Guo" , "Li Yang" , "Russell King" , "Marek Vasut" , "Marcel Ziswiler" , "Michael Ellerman" , "Nicholas Piggin" , "Christophe Leroy" , "Masahiro Yamada" , "Nathan Chancellor" , "Nick Desaulniers" , "Nicolas Schier" Cc: "Nicolas Saenz Julienne" , soc@kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, linux-kbuild@vger.kernel.org Subject: Re: [PATCH v2 10/10] ARM: add multi_v7_lpae_defconfig X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230120_091919_938651_EBECA63D X-CRM114-Status: GOOD ( 16.01 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Fri, Jan 20, 2023, at 14:34, Alexander Stein wrote: > From: Nicolas Saenz Julienne > > The only missing configuration option preventing us from using > multi_v7_defconfig with the Raspberry Pi 4 is ARM_LPAE. It's needed as > the PCIe controller found on the SoC depends on 64bit addressing, yet > can't be included as not all v7 boards support LPAE. > > Introduce multi_v7_lpae_defconfig, built off multi_v7_defconfig, which will > avoid us having to duplicate and maintain multiple similar configurations. > > Needless to say the Raspberry Pi 4 is not the only platform that can > benefit from this new configuration. > > Signed-off-by: Nicolas Saenz Julienne > Signed-off-by: Alexander Stein This is ok in principle, two minor points though: > +include $(srctree)/scripts/Makefile.defconf > +PHONY += multi_v7_lpae_defconfig > +multi_v7_lpae_defconfig: > + $(call merge_into_defconfig,multi_v7_defconfig,lpae) > > define archhelp > echo '* zImage - Compressed kernel image (arch/$(ARCH)/boot/zImage)' The new target does not get listed in 'make help' as far as I can tell, can you add it there in the process? > diff --git a/arch/arm/configs/lpae.config b/arch/arm/configs/lpae.config > new file mode 100644 > index 0000000000000..19bab134e014b > --- /dev/null > +++ b/arch/arm/configs/lpae.config > @@ -0,0 +1 @@ > +CONFIG_ARM_LPAE=y My feeling is that we probably want CONFIG_VMSPLIT_2G=y here as well, given that a lot of the systems that want LPAE will have a lot of memory, and are limited by the amount of lowmem even when CONFIG_HIGHMEM is enabled. Can you make sure that this works on your machine, and include this option? Arnd _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel