summaryrefslogtreecommitdiff
path: root/meta/classes/kernel-yocto.bbclass
blob: 650ae5a4736b3255f07aee73f0d4c84cd329bd0b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
# remove tasks that modify the source tree in case externalsrc is inherited
SRCTREECOVEREDTASKS += "do_kernel_link_vmlinux do_kernel_configme do_validate_branches do_kernel_configcheck do_kernel_checkout do_shared_workdir do_fetch do_unpack do_patch"

# returns local (absolute) path names for all valid patches in the
# src_uri
def find_patches(d):
    patches = src_patches(d)
    patch_list=[]
    for p in patches:
        _, _, local, _, _, _ = bb.fetch.decodeurl(p)
        patch_list.append(local)

    return patch_list

# returns all the elements from the src uri that are .scc files
def find_sccs(d):
    sources=src_patches(d, True)
    sources_list=[]
    for s in sources:
        base, ext = os.path.splitext(os.path.basename(s))
        if ext and ext in [".scc", ".cfg"]:
            sources_list.append(s)
        elif base and base in 'defconfig':
            sources_list.append(s)

    return sources_list

# check the SRC_URI for "kmeta" type'd git repositories. Return the name of
# the repository as it will be found in WORKDIR
def find_kernel_feature_dirs(d):
    feature_dirs=[]
    fetch = bb.fetch2.Fetch([], d)
    for url in fetch.urls:
        urldata = fetch.ud[url]
        parm = urldata.parm
        if "type" in parm:
            type = parm["type"]
        if "destsuffix" in parm:
            destdir = parm["destsuffix"]
            if type == "kmeta":
                feature_dirs.append(destdir)
	    
    return feature_dirs

# find the master/machine source branch. In the same way that the fetcher proceses
# git repositories in the SRC_URI we take the first repo found, first branch.
def get_machine_branch(d, default):
    fetch = bb.fetch2.Fetch([], d)
    for url in fetch.urls:
        urldata = fetch.ud[url]
        parm = urldata.parm
        if "branch" in parm:
            branches = urldata.parm.get("branch").split(',')
            return branches[0]
	    
    return default

do_kernel_metadata() {
	set +e
	cd ${S}
	export KMETA=${KMETA}

	# if kernel tools are available in-tree, they are preferred
	# and are placed on the path before any external tools. Unless
	# the external tools flag is set, in that case we do nothing.
	if [ -f "${S}/scripts/util/configme" ]; then
		if [ -z "${EXTERNAL_KERNEL_TOOLS}" ]; then
			PATH=${S}/scripts/util:${PATH}
		fi
	fi

	machine_branch="${@ get_machine_branch(d, "${KBRANCH}" )}"
	machine_srcrev="${SRCREV_machine}"
	if [ -z "${machine_srcrev}" ]; then
		# fallback to SRCREV if a non machine_meta tree is being built
		machine_srcrev="${SRCREV}"
	fi

	# In a similar manner to the kernel itself:
	#
	#   defconfig: $(obj)/conf
	#   ifeq ($(KBUILD_DEFCONFIG),)
	#	$< --defconfig $(Kconfig)
	#   else
	#	@echo "*** Default configuration is based on '$(KBUILD_DEFCONFIG)'"
	#	$(Q)$< --defconfig=arch/$(SRCARCH)/configs/$(KBUILD_DEFCONFIG) $(Kconfig)
	#   endif
	#
	# If a defconfig is specified via the KBUILD_DEFCONFIG variable, we copy it
	# from the source tree, into a common location and normalized "defconfig" name,
	# where the rest of the process will include and incoroporate it into the build
	#
	# If the fetcher has already placed a defconfig in WORKDIR (from the SRC_URI),
	# we don't overwrite it, but instead warn the user that SRC_URI defconfigs take
	# precendence.
	#
	if [ -n "${KBUILD_DEFCONFIG}" ]; then
		if [ -f "${S}/arch/${ARCH}/configs/${KBUILD_DEFCONFIG}" ]; then
			if [ -f "${WORKDIR}/defconfig" ]; then
				# If the two defconfigs are the same, leave the existing one in place
				cmp "${WORKDIR}/defconfig" "${S}/arch/${ARCH}/configs/${KBUILD_DEFCONFIG}"
				if [ $? -ne 0 ]; then
					bbnote "defconfig detected in WORKDIR. ${KBUILD_DEFCONFIG} skipped"
				else
					cp -f ${S}/arch/${ARCH}/configs/${KBUILD_DEFCONFIG} ${WORKDIR}/defconfig
					sccs="${WORKDIR}/defconfig"
				fi
			fi
		else
			bbfatal "A KBUILD_DECONFIG '${KBUILD_DEFCONFIG}' was specified, but not present in the source tree"
		fi
	fi

	# if we have a defined/set meta branch we should not be generating
	# any meta data. The passed branch has what we need.
	if [ -n "${KMETA}" ]; then
		createme_flags="--disable-meta-gen --meta ${KMETA}"
	fi

	createme -v -v ${createme_flags} ${ARCH} ${machine_branch}
	if [ $? -ne 0 ]; then
		bbfatal "Could not create ${machine_branch}"
	fi

	sccs="$sccs ${@" ".join(find_sccs(d))}"
	patches="${@" ".join(find_patches(d))}"
	feat_dirs="${@" ".join(find_kernel_feature_dirs(d))}"

	# add any explicitly referenced features onto the end of the feature
	# list that is passed to the kernel build scripts.
	if [ -n "${KERNEL_FEATURES}" ]; then
		for feat in ${KERNEL_FEATURES}; do
			addon_features="$addon_features --feature $feat"
		done
	fi

	# check for feature directories/repos/branches that were part of the
	# SRC_URI. If they were supplied, we convert them into include directives
	# for the update part of the process
	if [ -n "${feat_dirs}" ]; then
	    for f in ${feat_dirs}; do
		if [ -d "${WORKDIR}/$f/meta" ]; then
		    includes="$includes -I${WORKDIR}/$f/meta"
		elif [ -d "${WORKDIR}/$f" ]; then
		    includes="$includes -I${WORKDIR}/$f"
		fi
	    done
	fi

	# updates or generates the target description
	updateme ${updateme_flags} -DKDESC=${KMACHINE}:${LINUX_KERNEL_TYPE} \
                         ${includes} ${addon_features} ${ARCH} ${KMACHINE} ${sccs} ${patches}
	if [ $? -ne 0 ]; then
		bbfatal "Could not update ${machine_branch}"
	fi
}

do_patch() {
	cd ${S}

	# executes and modifies the source tree as required
	patchme ${KMACHINE}
	if [ $? -ne 0 ]; then
		bberror "Could not apply patches for ${KMACHINE}."
		bbfatal "Patch failures can be resolved in the devshell (bitbake -c devshell ${PN})"
	fi

	# check to see if the specified SRCREV is reachable from the final branch.
	# if it wasn't something wrong has happened, and we should error.
	if [ "${machine_srcrev}" != "AUTOINC" ]; then
		if ! [ "$(git rev-parse --verify ${machine_srcrev}~0)" = "$(git merge-base ${machine_srcrev} HEAD)" ]; then
			bberror "SRCREV ${machine_srcrev} was specified, but is not reachable"
			bbfatal "Check the BSP description for incorrect branch selection, or other errors."
		fi
	fi
}

do_kernel_checkout() {
	set +e

	# A linux yocto SRC_URI should use the bareclone option. That
	# ensures that all the branches are available in the WORKDIR version
	# of the repository.
	source_dir=`echo ${S} | sed 's%/$%%'`
	source_workdir="${WORKDIR}/git"
	if [ -d "${WORKDIR}/git/" ] && [ -d "${WORKDIR}/git/.git" ]; then
		# case2: the repository is a non-bare clone

		# if S is WORKDIR/git, then we shouldn't be moving or deleting the tree.
		if [ "${source_dir}" != "${source_workdir}" ]; then
			rm -rf ${S}
			mv ${WORKDIR}/git ${S}
		fi
		cd ${S}
	elif [ -d "${WORKDIR}/git/" ] && [ ! -d "${WORKDIR}/git/.git" ]; then
		# case2: the repository is a bare clone

		# if S is WORKDIR/git, then we shouldn't be moving or deleting the tree.
		if [ "${source_dir}" != "${source_workdir}" ]; then
			rm -rf ${S}
			mkdir -p ${S}/.git
			mv ${WORKDIR}/git/* ${S}/.git
			rm -rf ${WORKDIR}/git/
		fi
		cd ${S}	
		git config core.bare false
	else
		# case 3: we have no git repository at all. 
		# To support low bandwidth options for building the kernel, we'll just 
		# convert the tree to a git repo and let the rest of the process work unchanged
		
		# if ${S} hasn't been set to the proper subdirectory a default of "linux" is 
		# used, but we can't initialize that empty directory. So check it and throw a
		# clear error

	        cd ${S}
		if [ ! -f "Makefile" ]; then
			bberror "S is not set to the linux source directory. Check "
			bbfatal "the recipe and set S to the proper extracted subdirectory"
		fi
		rm -f .gitignore
		git init
		git add .
		git commit -q -m "baseline commit: creating repo for ${PN}-${PV}"
		git clean -d -f
	fi
	# end debare

	# convert any remote branches to local tracking ones
	for i in `git branch -a --no-color | grep remotes | grep -v HEAD`; do
		b=`echo $i | cut -d' ' -f2 | sed 's%remotes/origin/%%'`;
		git show-ref --quiet --verify -- "refs/heads/$b"
		if [ $? -ne 0 ]; then
			git branch $b $i > /dev/null
		fi
	done

       	# If KMETA is defined, the branch must exist, but a machine branch
	# can be missing since it may be created later by the tools.
	if [ -n "${KMETA}" ]; then
		git show-ref --quiet --verify -- "refs/heads/${KMETA}"
		if [ $? -eq 1 ]; then
			bberror "The branch '${KMETA}' is required and was not found"
			bberror "Ensure that the SRC_URI points to a valid linux-yocto"
			bbfatal "kernel repository"
		fi
	fi
	

	# Create a working tree copy of the kernel by checking out a branch
	machine_branch="${@ get_machine_branch(d, "${KBRANCH}" )}"
	git show-ref --quiet --verify -- "refs/heads/${machine_branch}"
	if [ $? -ne 0 ]; then
		machine_branch="master"
	fi

	# checkout and clobber any unimportant files
	git checkout -f ${machine_branch}
}
do_kernel_checkout[dirs] = "${S}"

addtask kernel_checkout before do_patch after do_unpack
addtask kernel_metadata after do_validate_branches before do_patch
do_kernel_metadata[depends] = "kern-tools-native:do_populate_sysroot"

do_kernel_configme[dirs] += "${S} ${B}"
do_kernel_configme() {
	bbnote "kernel configme"
	export KMETA=${KMETA}

	if [ -n "${KCONFIG_MODE}" ]; then
		configmeflags=${KCONFIG_MODE}
	else
		# If a defconfig was passed, use =n as the baseline, which is achieved
		# via --allnoconfig
		if [ -f ${WORKDIR}/defconfig ]; then
			configmeflags="--allnoconfig"
		fi
	fi

	cd ${S}
	PATH=${PATH}:${S}/scripts/util
	configme ${configmeflags} --reconfig --output ${B} ${LINUX_KERNEL_TYPE} ${KMACHINE}
	if [ $? -ne 0 ]; then
		bbfatal "Could not configure ${KMACHINE}-${LINUX_KERNEL_TYPE}"
	fi
	
	echo "# Global settings from linux recipe" >> ${B}/.config
	echo "CONFIG_LOCALVERSION="\"${LINUX_VERSION_EXTENSION}\" >> ${B}/.config
}

addtask kernel_configme before do_configure after do_patch

python do_kernel_configcheck() {
    import re, string, sys

    # if KMETA isn't set globally by a recipe using this routine, we need to
    # set the default to 'meta'. Otherwise, kconf_check is not passed a valid
    # meta-series for processing
    kmeta = d.getVar( "KMETA", True ) or "meta"
    if not os.path.exists(kmeta):
        kmeta = "." + kmeta

    pathprefix = "export PATH=%s:%s; " % (d.getVar('PATH', True), "${S}/scripts/util/")
    cmd = d.expand("cd ${S}; kconf_check -config- %s/meta-series ${S} ${B}" % kmeta)
    ret, result = oe.utils.getstatusoutput("%s%s" % (pathprefix, cmd))

    config_check_visibility = int(d.getVar( "KCONF_AUDIT_LEVEL", True ) or 0)
    bsp_check_visibility = int(d.getVar( "KCONF_BSP_AUDIT_LEVEL", True ) or 0)

    # if config check visibility is non-zero, report dropped configuration values
    mismatch_file = "${S}/" + kmeta + "/" + "mismatch.cfg"
    if os.path.exists(mismatch_file):
        if config_check_visibility:
            with open (mismatch_file, "r") as myfile:
                results = myfile.read()
                bb.warn( "[kernel config]: specified values did not make it into the kernel's final configuration:\n\n%s" % results)

    # if config check visibility is level 2 or higher, report non-hardware options
    nonhw_file = "${S}/" + kmeta + "/" + "nonhw_report.cfg"
    if os.path.exists(nonhw_file):
        if config_check_visibility > 1:
            with open (nonhw_file, "r") as myfile:
                results = myfile.read()
                bb.warn( "[kernel config]: BSP specified non-hw configuration:\n\n%s" % results)

    bsp_desc = "${S}/" + kmeta + "/" + "top_tgt"
    if os.path.exists(bsp_desc) and bsp_check_visibility > 1:
        with open (bsp_desc, "r") as myfile:
            bsp_tgt = myfile.read()
            m = re.match("^(.*)scratch.obj(.*)$", bsp_tgt)
            if not m is None:
                bb.warn( "[kernel]: An auto generated BSP description was used, this normally indicates a misconfiguration.\n" +
                         "Check that your machine (%s) has an associated kernel description." % "${MACHINE}" )
}

# Ensure that the branches (BSP and meta) are on the locations specified by
# their SRCREV values. If they are NOT on the right commits, the branches
# are corrected to the proper commit.
do_validate_branches() {
	set +e
	cd ${S}
	export KMETA=${KMETA}

	machine_branch="${@ get_machine_branch(d, "${KBRANCH}" )}"
	machine_srcrev="${SRCREV_machine}"

	# if SRCREV is AUTOREV it shows up as AUTOINC there's nothing to
	# check and we can exit early
	if [ "${machine_srcrev}" = "AUTOINC" ]; then
		bbnote "SRCREV validation is not required for AUTOREV"
	elif [ "${machine_srcrev}" = "" ]; then
		if [ "${SRCREV}" != "AUTOINC" ] && [ "${SRCREV}" != "INVALID" ]; then
		       # SRCREV_machine_<MACHINE> was not set. This means that a custom recipe
		       # that doesn't use the SRCREV_FORMAT "machine_meta" is being built. In
		       # this case, we need to reset to the give SRCREV before heading to patching
		       bbnote "custom recipe is being built, forcing SRCREV to ${SRCREV}"
		       force_srcrev="${SRCREV}"
		fi
	else
		git cat-file -t ${machine_srcrev} > /dev/null
		if [ $? -ne 0 ]; then
			bberror "${machine_srcrev} is not a valid commit ID."
			bbfatal "The kernel source tree may be out of sync"
		fi
		force_srcrev=${machine_srcrev}
	fi

	## KMETA branch validation.
	target_meta_head="${SRCREV_meta}"
	if [ "${target_meta_head}" = "AUTOINC" ] || [ "${target_meta_head}" = "" ]; then
		bbnote "SRCREV validation skipped for AUTOREV or empty meta branch"
	else
	 	meta_head=`git show-ref -s --heads ${KMETA}`

		git cat-file -t ${target_meta_head} > /dev/null
		if [ $? -ne 0 ]; then
			bberror "${target_meta_head} is not a valid commit ID"
			bbfatal "The kernel source tree may be out of sync"
		fi
		if [ "$meta_head" != "$target_meta_head" ]; then
			bbnote "Setting branch ${KMETA} to ${target_meta_head}"
			git branch -m ${KMETA} ${KMETA}-orig
			git checkout -q -b ${KMETA} ${target_meta_head}
			if [ $? -ne 0 ];then
				bbfatal "Could not checkout ${KMETA} branch from known hash ${target_meta_head}"
			fi
		fi
	fi

	git checkout -q -f ${machine_branch}
	if [ -n "${force_srcrev}" ]; then
		# see if the branch we are about to patch has been properly reset to the defined
		# SRCREV .. if not, we reset it.
		branch_head=`git rev-parse HEAD`
		if [ "${force_srcrev}" != "${branch_head}" ]; then
			current_branch=`git rev-parse --abbrev-ref HEAD`
			git branch "$current_branch-orig"
			git reset --hard ${force_srcrev}
		fi
	fi
}

# Many scripts want to look in arch/$arch/boot for the bootable
# image. This poses a problem for vmlinux based booting. This 
# task arranges to have vmlinux appear in the normalized directory
# location.
do_kernel_link_vmlinux() {
	if [ ! -d "${B}/arch/${ARCH}/boot" ]; then
		mkdir ${B}/arch/${ARCH}/boot
	fi
	cd ${B}/arch/${ARCH}/boot
	ln -sf ../../../vmlinux
}

OE_TERMINAL_EXPORTS += "KBUILD_OUTPUT"
KBUILD_OUTPUT = "${B}"

python () {
    # If diffconfig is available, ensure it runs after kernel_configme
    if 'do_diffconfig' in d:
        bb.build.addtask('do_diffconfig', None, 'do_kernel_configme', d)
}