CONFIG_ARCH_U8500 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm
ST-Ericsson U8500 Series
configname: CONFIG_ARCH_U8500
ARM system type
└─>ST-Ericsson U8500 Series
In linux kernel since version 2.6.33 (release Date: 2010-02-24)
Support for ST-Ericsson's Ux500 architecture
selects
CONFIG_CPU_V7CONFIG_ARM_AMBA
CONFIG_GENERIC_CLOCKEVENTS
CONFIG_CLKDEV_LOOKUP
CONFIG_ARCH_REQUIRE_GPIOLIB
CONFIG_ARCH_HAS_CPUFREQ
CONFIG_AB8500_CORE
CONFIG_ABX500_CORE
CONFIG_ARM_ERRATA_754322
CONFIG_ARM_ERRATA_764369
CONFIG_ARM_GIC
CONFIG_CACHE_L2X0
CONFIG_CLKSRC_NOMADIK_MTU
CONFIG_GPIOLIB
CONFIG_HAVE_ARM_SCU
CONFIG_HAVE_ARM_TWD
CONFIG_PINCTRL
CONFIG_PINCTRL_ABX500
CONFIG_PINCTRL_NOMADIK
CONFIG_PL310_ERRATA_753970
CONFIG_CLKSRC_DBX500_PRCMU
CONFIG_I2C
CONFIG_I2C_NOMADIK
CONFIG_MFD_DB8500_PRCMU
CONFIG_PINCTRL_AB8500
CONFIG_PINCTRL_AB8505
CONFIG_PINCTRL_DB8500
CONFIG_PM_GENERIC_DOMAINS
CONFIG_REGULATOR
CONFIG_REGULATOR_DB8500_PRCMU
CONFIG_REGULATOR_FIXED_VOLTAGE
CONFIG_SOC_BUS