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Mon, 17 Feb 2020 04:53:03 -0800 (PST) Date: Mon, 17 Feb 2020 13:53:01 +0100 From: LABBE Corentin To: Matthias Brugger Subject: Re: RPI4: fail too boot with an initrd Message-ID: <20200217125301.GA31847@Red> References: <20200214132748.GA23276@Red> <20200217103733.GA11379@Red> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.10.1 (2018-07-13) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200217_045306_090310_7C3E6B9B X-CRM114-Status: GOOD ( 28.53 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, u-boot@lists.denx.de, James Morse , linux-rpi-kernel@lists.infradead.org, bcm-kernel-feedback-list@broadcom.com, nsaenzjulienne@suse.de Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Mon, Feb 17, 2020 at 11:50:04AM +0100, Matthias Brugger wrote: > > > On 17/02/2020 11:37, LABBE Corentin wrote: > > On Fri, Feb 14, 2020 at 06:15:27PM +0000, James Morse wrote: > >> Hi Corentin, > >> > >> On 14/02/2020 13:27, LABBE Corentin wrote: > >>> Since the inclusion of the "enable network support in RPi4 config" serie on uboot, I > >>> have started to work on adding the rpi4 in kernelCI. > >>> But I fail to succeed in using a kernel/dtb/ramdisk downloaded via tftp. > >>> > >>> Using booti I hit: > >>> [ 0.000000] Linux version 5.6.0-rc1-next-20200212 (clabbe@build2-bionic-1804) (gcc version 7.4.1 20181213 [linaro-7.4-2019.02 revision 56ec6f6b99cc167ff0c2f8e1a2eed33b1edc85d4] (Linaro GCC 7.4-2019.02)) #66 SMP PREEMPT Wed Feb 12 10:14:20 UTC 2020 > >>> [ 0.000000] Machine model: Raspberry Pi 4 Model B > >>> [ 0.000000] earlycon: uart0 at MMIO32 0x00000000fe215040 (options '') > >>> [ 0.000000] printk: bootconsole [uart0] enabled > >>> [ 0.000000] efi: Getting EFI parameters from FDT: > >>> [ 0.000000] efi: UEFI not found. > >> > >> So no EFI, > >> > >>> [ 0.000000] OF: reserved mem: failed to allocate memory for node 'linux,cma' > >> > >> Out of memory. > >> > >>> [ 0.000000] cma: Failed to reserve 32 MiB > >>> [ 0.000000] Kernel panic - not syncing: Failed to allocate page table page > >> > >> Out of memory... > >> > >>> [ 0.000000] CPU: 0 PID: 0 Comm: swapper Not tainted 5.6.0-rc1-next-20200212 #66 > >>> [ 0.000000] Hardware name: Raspberry Pi 4 Model B (DT) > >>> [ 0.000000] Call trace: > >>> [ 0.000000] dump_backtrace+0x0/0x1a0 > >>> [ 0.000000] show_stack+0x14/0x20 > >>> [ 0.000000] dump_stack+0xbc/0x104 > >>> [ 0.000000] panic+0x16c/0x37c > >>> [ 0.000000] early_pgtable_alloc+0x30/0xa0 > >> > >> ... really early! > >> > >>> [ 0.000000] __create_pgd_mapping+0x36c/0x588 > >>> [ 0.000000] map_kernel_segment+0x70/0xa4 > >>> [ 0.000000] paging_init+0xf4/0x528 > >>> [ 0.000000] setup_arch+0x250/0x5d8 > >>> [ 0.000000] start_kernel+0x90/0x6d8 > >>> > >>> > >>> Since the same kernel boot with bootefi and that bootefi lack ramdisk address, > >> > >> Booting with EFI will cause linux to use the EFI memory map. > >> > >> Does your DT have a memory node? (or does it expect EFI to provide the information) > >> > >> > >>> I tried to add the address in the dtb via: > >>> fdt addr 0x02400000; fdt resize; fdt set /chosen linux,initrd-start 0x02700000; fdt set /chosen linux,initrd-end 0x10000000; bootefi 0x00080000 0x02400000 > >>> But with that, I get: > >>> initrd not fully accessible via the linear mapping -- please check your bootloader ... > >> > >> So this one is an EFI boot, but you can't find where to put the initramfs such that the > >> kernel agrees its in memory. > >> > >> If you boot with 'efi=debug', linux will print the EFI memory map. Could you compare that > >> to where U-Boot thinks memory is? > >> > >> (it sounds like your DT memory node is missing, and your EFI memory map is surprisingly small) > > > > Hello > > > > Thanks for your advices. > > > > In the dtb of mainline linux: > > /* Will be filled by the bootloader */ > > memory@0 { > > device_type = "memory"; > > reg = <0 0 0>; > > }; > > > > In uboot I have: > > static struct mm_region bcm2711_mem_map[] = { > > { > > .virt = 0x00000000UL, > > .phys = 0x00000000UL, > > .size = 0xfe000000UL, > > .attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) | > > PTE_BLOCK_INNER_SHARE > > }, { > > .virt = 0xfc000000UL, > > .phys = 0xfc000000UL, > > .size = 0x03800000UL, > > .attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) | > > PTE_BLOCK_NON_SHARE | > > PTE_BLOCK_PXN | PTE_BLOCK_UXN > > }, { > > /* List terminator */ > > 0, > > } > > }; > > But I dont know if uboot use that for filling the memory node. > > No it doesn't. U-Boot uses the DT from the firmware and passes this to the > kernel. But it seems you pass instead your own device-tree to the kernel, so you > will need to update the memory node to show the available memory on you board. > I dont understand, in the Linux commit "ARM: dts: Add minimal Raspberry Pi 4 support" I read: The RPi 4 is available in 3 different variants (1, 2 and 4 GB RAM), so leave the memory size to zero and let the bootloader take care of it. But if uboot dont fill that... So the DTB in mainline is wrong, right ? Regards _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel