CONFIG_DEBUG_UART_8250 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm
CONFIG_DEBUG_UART_8250 (not configurable)
configname: CONFIG_DEBUG_UART_8250
Linux Kernel Configuration
└─>Kernel hacking
└─>DEBUG_UART_8250
In linux kernel since version 3.10 (release Date: 2013-06-30)
is depended by
CONFIG_DEBUG_BCM_5301XCONFIG_DEBUG_BCM_KONA_UART
CONFIG_DEBUG_BERLIN_UART
CONFIG_DEBUG_BRCMSTB_UART
CONFIG_DEBUG_CNS3XXX
CONFIG_DEBUG_HIP01_UART
CONFIG_DEBUG_HIP04_UART
CONFIG_DEBUG_KEYSTONE_UART0
CONFIG_DEBUG_KEYSTONE_UART1
CONFIG_DEBUG_MVEBU_UART0
CONFIG_DEBUG_MVEBU_UART0_ALTERNATE
CONFIG_DEBUG_MVEBU_UART1_ALTERNATE
CONFIG_DEBUG_NSPIRE_CLASSIC_UART
CONFIG_DEBUG_OMAP1UART1
CONFIG_DEBUG_OMAP1UART2
CONFIG_DEBUG_OMAP1UART3
CONFIG_DEBUG_OMAP7XXUART1
CONFIG_DEBUG_OMAP7XXUART2
CONFIG_DEBUG_OMAP7XXUART3
CONFIG_DEBUG_PXA_UART1
CONFIG_DEBUG_RK29_UART0
CONFIG_DEBUG_RK29_UART1
CONFIG_DEBUG_RK29_UART2
CONFIG_DEBUG_RK3X_UART0
CONFIG_DEBUG_RK3X_UART1
CONFIG_DEBUG_RK3X_UART2
CONFIG_DEBUG_RK3X_UART3
CONFIG_DEBUG_RK32_UART2
CONFIG_DEBUG_SUN9I_UART0
CONFIG_DEBUG_SUNXI_R_UART
CONFIG_DEBUG_MT6589_UART0
CONFIG_DEBUG_MT8127_UART0
CONFIG_DEBUG_MT8135_UART3