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Date: Thu, 10 Dec 2015 14:43:43 +0100 From: Arnd Bergmann <arnd@...db.de> To: linux-arm-kernel@...ts.infradead.org Cc: Detlef Vollmann <dv@...lmann.ch>, Andrew Lunn <andrew@...n.ch>, Russell King <linux@....linux.org.uk>, Jason Cooper <jason@...edaemon.net>, Benjamin Cama <benoar@...ka.fr>, linux-kernel@...r.kernel.org, Gregory CLEMENT <gregory.clement@...e-electrons.com>, "Evgeniy A. Dushistov" <dushistov@...l.ru>, Sebastian Hesselbarth <sebastian.hesselbarth@...il.com> Subject: Re: [PATCH 0/5] ARM: orion5x/dove/mv78xx0 multiplatform On Thursday 10 December 2015 14:18:11 Arnd Bergmann wrote: > On Thursday 10 December 2015 13:56:05 Detlef Vollmann wrote: > > On 11/30/15 14:43, Gregory CLEMENT wrote: > > >> Detlef, Benjamin, > > >> > > >> could you test it on an Orion5x based board? > > Ok, I tested the v2 series on v4.4-rc3 on my > > DNS-323: Identified HW revision B1 > > Orion ID: MV88F5182-A2. TCLK=166666667. > > > > Only basic tests, serial port and network. > > > > The good news: > > orion5x_defconfig works and is even slightly smaller than the > > original v4.4-rc3 kernel image. > > > > The bad news: > > My own config (which is massivly stripped down) produces a kernel > > image that's more than 26K bigger than on v4.4-rc3 without any > > added functionality. > > The DNS-323 is extremly constrained in space (the whole system > > including boot loader, kernel and filesystem has to fit into 8M flash). > > Any ideas how I can get rid of this additional overhead? > > Can you send me your config file? I can have a look. > I've done a quick check with an allnoconfig-like test and it seems that CONFIG_OF is weighing in at around 86K here, with all the other options it pulls in, comparing an allnoconfig kernel for DS-323 with one that has CONFIG_OF enabled as well. The multiplatform kernel also enables CONFIG_OF unconditionally, but is otherwise a little smaller than the mach-orion5x based one: text data bss dec hex filename 942144 64112 17648 1023904 f9fa0 build/tmp/vmlinux-orion-allno 1027516 54052 20824 1102392 10d238 build/tmp/vmlinux-multi-plus-orion 1025320 66020 18744 1110084 10f044 build/tmp/vmlinux-orion-plus-of The diff below shows all the differences between orion-allno and multi-plus-orion. Arnd --- config-orion 2015-12-10 14:25:05.609113585 +0100 +++ .config 2015-12-10 14:24:29.646879038 +0100 @@ -3,6 +3,8 @@ # Linux/arm 4.4.0-rc4 Kernel Configuration # CONFIG_ARM=y +CONFIG_ARM_HAS_SG_CHAIN=y +CONFIG_MIGHT_HAVE_PCI=y CONFIG_SYS_SUPPORTS_APM_EMULATION=y CONFIG_STACKTRACE_SUPPORT=y CONFIG_LOCKDEP_SUPPORT=y @@ -14,8 +16,7 @@ CONFIG_NEED_DMA_MAP_STATE=y CONFIG_ARCH_SUPPORTS_UPROBES=y CONFIG_VECTORS_BASE=0xffff0000 -# CONFIG_ARM_PATCH_PHYS_VIRT is not set -CONFIG_PHYS_OFFSET=0x0 +CONFIG_ARM_PATCH_PHYS_VIRT=y CONFIG_PGTABLE_LEVELS=2 CONFIG_DEFCONFIG_LIST="/lib/modules/$UNAME_RELEASE/.config" CONFIG_BUILDTIME_EXTABLE_SORT=y @@ -56,6 +57,7 @@ CONFIG_IRQ_DOMAIN=y CONFIG_HANDLE_DOMAIN_IRQ=y CONFIG_IRQ_FORCED_THREADING=y +CONFIG_SPARSE_IRQ=y CONFIG_GENERIC_CLOCKEVENTS=y # @@ -186,7 +188,7 @@ # System Type # CONFIG_MMU=y -# CONFIG_ARCH_MULTIPLATFORM is not set +CONFIG_ARCH_MULTIPLATFORM=y # CONFIG_ARCH_VERSATILE is not set # CONFIG_ARCH_CLPS711X is not set # CONFIG_ARCH_GEMINI is not set @@ -198,9 +200,6 @@ # CONFIG_ARCH_IOP32X is not set # CONFIG_ARCH_IOP33X is not set # CONFIG_ARCH_IXP4XX is not set -# CONFIG_ARCH_DOVE is not set -# CONFIG_ARCH_MV78XX0 is not set -CONFIG_ARCH_ORION5X=y # CONFIG_ARCH_KS8695 is not set # CONFIG_ARCH_W90X900 is not set # CONFIG_ARCH_LPC32XX is not set @@ -212,8 +211,29 @@ # CONFIG_ARCH_OMAP1 is not set # -# Orion Implementations +# Multiple platform selection +# + # +# CPU Core family selection +# +# CONFIG_ARCH_MULTI_V4 is not set +# CONFIG_ARCH_MULTI_V4T is not set +CONFIG_ARCH_MULTI_V5=y +CONFIG_ARCH_MULTI_V4_V5=y +# CONFIG_ARCH_MULTI_V6 is not set +# CONFIG_ARCH_MULTI_V7 is not set +CONFIG_ARCH_MULTI_CPU_AUTO=y +# CONFIG_ARCH_MVEBU is not set +# CONFIG_MACH_ASM9260 is not set +# CONFIG_ARCH_AT91 is not set +# CONFIG_ARCH_INTEGRATOR is not set +# CONFIG_ARCH_MV78XX0 is not set +# CONFIG_ARCH_MXC is not set +# CONFIG_ARCH_MXS is not set +# CONFIG_ARCH_NOMADIK is not set +# CONFIG_ARCH_NSPIRE is not set +CONFIG_ARCH_ORION5X=y # CONFIG_ARCH_ORION5X_DT is not set # CONFIG_MACH_DB88F5281 is not set # CONFIG_MACH_RD88F5182 is not set @@ -237,6 +257,11 @@ # CONFIG_MACH_RD88F5181L_GE is not set # CONFIG_MACH_RD88F5181L_FXO is not set # CONFIG_MACH_RD88F6183AP_GE is not set +# CONFIG_ARCH_MMP is not set +# CONFIG_ARCH_REALVIEW is not set +# CONFIG_PLAT_SPEAR is not set +# CONFIG_ARCH_U300 is not set +# CONFIG_ARCH_WM8505 is not set CONFIG_PLAT_ORION=y CONFIG_PLAT_ORION_LEGACY=y @@ -286,6 +311,10 @@ # # PCI host controller drivers # +# CONFIG_PCI_HOST_GENERIC is not set +# CONFIG_PCI_LAYERSCAPE is not set +# CONFIG_PCIE_IPROC is not set +# CONFIG_PCIE_ALTERA is not set # CONFIG_PCIEPORTBUS is not set # CONFIG_PCCARD is not set @@ -346,16 +375,16 @@ # # Boot options # -# CONFIG_USE_OF is not set +CONFIG_USE_OF=y CONFIG_ATAGS=y # CONFIG_DEPRECATED_PARAM_STRUCT is not set CONFIG_ZBOOT_ROM_TEXT=0 CONFIG_ZBOOT_ROM_BSS=0 +# CONFIG_ARM_APPENDED_DTB is not set CONFIG_CMDLINE="" -# CONFIG_XIP_KERNEL is not set # CONFIG_KEXEC is not set # CONFIG_CRASH_DUMP is not set -# CONFIG_AUTO_ZRELADDR is not set +CONFIG_AUTO_ZRELADDR=y # # CPU Power Management @@ -427,8 +456,20 @@ # # CONFIG_BRCMSTB_GISB_ARB is not set CONFIG_MVEBU_MBUS=y +# CONFIG_VEXPRESS_CONFIG is not set # CONFIG_MTD is not set -# CONFIG_OF is not set +CONFIG_DTC=y +CONFIG_OF=y +# CONFIG_OF_UNITTEST is not set +CONFIG_OF_FLATTREE=y +CONFIG_OF_EARLY_FLATTREE=y +CONFIG_OF_ADDRESS=y +CONFIG_OF_ADDRESS_PCI=y +CONFIG_OF_IRQ=y +CONFIG_OF_PCI=y +CONFIG_OF_PCI_IRQ=y +CONFIG_OF_RESERVED_MEM=y +# CONFIG_OF_OVERLAY is not set CONFIG_ARCH_MIGHT_HAVE_PC_PARPORT=y # CONFIG_PARPORT is not set @@ -550,17 +591,26 @@ # Enable PHYLIB and NETWORK_PHY_TIMESTAMPING to see the additional clocks. # CONFIG_ARCH_HAVE_CUSTOM_GPIO_H=y +CONFIG_ARCH_WANT_OPTIONAL_GPIOLIB=y CONFIG_ARCH_REQUIRE_GPIOLIB=y CONFIG_GPIOLIB=y CONFIG_GPIO_DEVRES=y +CONFIG_OF_GPIO=y # CONFIG_DEBUG_GPIO is not set # # Memory mapped GPIO drivers # +# CONFIG_GPIO_74XX_MMIO is not set +# CONFIG_GPIO_ALTERA is not set # CONFIG_GPIO_DWAPB is not set +# CONFIG_GPIO_EM is not set # CONFIG_GPIO_GENERIC_PLATFORM is not set +# CONFIG_GPIO_GRGPIO is not set +CONFIG_GPIO_MVEBU=y # CONFIG_GPIO_VX855 is not set +# CONFIG_GPIO_XILINX is not set +# CONFIG_GPIO_ZEVIO is not set # CONFIG_GPIO_ZX is not set # @@ -597,8 +647,11 @@ # Multifunction device drivers # # CONFIG_MFD_CORE is not set +# CONFIG_MFD_ATMEL_FLEXCOM is not set +# CONFIG_MFD_ATMEL_HLCDC is not set # CONFIG_MFD_CROS_EC is not set # CONFIG_MFD_ASIC3 is not set +# CONFIG_MFD_HI6421_PMIC is not set # CONFIG_HTC_EGPIO is not set # CONFIG_HTC_PASIC3 is not set # CONFIG_LPC_ICH is not set @@ -670,6 +723,7 @@ # # Common Clock Framework # +# CONFIG_CLK_QORIQ is not set # CONFIG_COMMON_CLK_PXA is not set # @@ -679,6 +733,8 @@ # # Clock Source drivers # +CONFIG_CLKSRC_OF=y +CONFIG_CLKSRC_PROBE=y CONFIG_CLKSRC_MMIO=y # CONFIG_ARM_TIMER_SP804 is not set # CONFIG_ATMEL_PIT is not set @@ -711,6 +767,7 @@ # CONFIG_NTB is not set # CONFIG_VME_BUS is not set # CONFIG_PWM is not set +CONFIG_IRQCHIP=y # CONFIG_IPACK_BUS is not set # CONFIG_RESET_CONTROLLER is not set # CONFIG_FMC is not set @@ -907,7 +964,7 @@ CONFIG_DEBUG_UART_8250_SHIFT=2 # CONFIG_DEBUG_UART_8250_WORD is not set # CONFIG_DEBUG_UART_8250_FLOW_CONTROL is not set -CONFIG_UNCOMPRESS_INCLUDE="mach/uncompress.h" +CONFIG_UNCOMPRESS_INCLUDE="debug/uncompress.h" # CONFIG_CORESIGHT is not set # @@ -924,6 +981,8 @@ # # Library routines # +CONFIG_BITREVERSE=y +# CONFIG_HAVE_ARCH_BITREVERSE is not set CONFIG_RATIONAL=y CONFIG_GENERIC_STRNCPY_FROM_USER=y CONFIG_GENERIC_STRNLEN_USER=y @@ -935,7 +994,12 @@ # CONFIG_CRC16 is not set # CONFIG_CRC_T10DIF is not set # CONFIG_CRC_ITU_T is not set -# CONFIG_CRC32 is not set +CONFIG_CRC32=y +# CONFIG_CRC32_SELFTEST is not set +CONFIG_CRC32_SLICEBY8=y +# CONFIG_CRC32_SLICEBY4 is not set +# CONFIG_CRC32_SARWATE is not set +# CONFIG_CRC32_BIT is not set # CONFIG_CRC7 is not set # CONFIG_LIBCRC32C is not set # CONFIG_CRC8 is not set @@ -952,6 +1016,7 @@ CONFIG_ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE=y # CONFIG_CORDIC is not set # CONFIG_DDR is not set +CONFIG_LIBFDT=y # CONFIG_SG_SPLIT is not set -# CONFIG_ARCH_HAS_SG_CHAIN is not set +CONFIG_ARCH_HAS_SG_CHAIN=y # CONFIG_VIRTUALIZATION is not set -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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