cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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generic-board-config.sh (2449B)

      1#!/bin/sh
      2# SPDX-License-Identifier: GPL-2.0-or-later
      3#
      4# Copyright (C) 2017 Imagination Technologies
      5# Author: Paul Burton <paul.burton@mips.com>
      6#
      7# This script merges configuration fragments for boards supported by the
      8# generic MIPS kernel. It checks each for requirements specified using
      9# formatted comments, and then calls merge_config.sh to merge those
     10# fragments which have no unmet requirements.
     11#
     12# An example of requirements in your board config fragment might be:
     13#
     14# # require CONFIG_CPU_MIPS32_R2=y
     15# # require CONFIG_CPU_LITTLE_ENDIAN=y
     16#
     17# This would mean that your board is only included in kernels which are
     18# configured for little endian MIPS32r2 CPUs, and not for example in kernels
     19# configured for 64 bit or big endian systems.
     20#
     21
     22srctree="$1"
     23objtree="$2"
     24ref_cfg="$3"
     25cfg="$4"
     26boards_origin="$5"
     27shift 5
     28
     29# Only print Skipping... lines if the user explicitly specified BOARDS=. In the
     30# general case it only serves to obscure the useful output about what actually
     31# was included.
     32case ${boards_origin} in
     33"command line")
     34	print_skipped=1
     35	;;
     36environment*)
     37	print_skipped=1
     38	;;
     39*)
     40	print_skipped=0
     41	;;
     42esac
     43
     44for board in $@; do
     45	board_cfg="${srctree}/arch/mips/configs/generic/board-${board}.config"
     46	if [ ! -f "${board_cfg}" ]; then
     47		echo "WARNING: Board config '${board_cfg}' not found"
     48		continue
     49	fi
     50
     51	# For each line beginning with # require, cut out the field following
     52	# it & search for that in the reference config file. If the requirement
     53	# is not found then the subshell will exit with code 1, and we'll
     54	# continue on to the next board.
     55	grep -E '^# require ' "${board_cfg}" | \
     56	    cut -d' ' -f 3- | \
     57	    while read req; do
     58		case ${req} in
     59		*=y)
     60			# If we require something =y then we check that a line
     61			# containing it is present in the reference config.
     62			grep -Eq "^${req}\$" "${ref_cfg}" && continue
     63			;;
     64		*=n)
     65			# If we require something =n then we just invert that
     66			# check, considering the requirement met if there isn't
     67			# a line containing the value =y in the reference
     68			# config.
     69			grep -Eq "^${req/%=n/=y}\$" "${ref_cfg}" || continue
     70			;;
     71		*)
     72			echo "WARNING: Unhandled requirement '${req}'"
     73			;;
     74		esac
     75
     76		[ ${print_skipped} -eq 1 ] && echo "Skipping ${board_cfg}"
     77		exit 1
     78	done || continue
     79
     80	# Merge this board config fragment into our final config file
     81	${srctree}/scripts/kconfig/merge_config.sh \
     82		-m -O ${objtree} ${cfg} ${board_cfg} \
     83		| grep -Ev '^(#|Using)'
     84done