Commit Graph

107 Commits

Author SHA1 Message Date
Stijn Tintel
4448b27930 kernel: set default for KERNEL_BPF_KPROBE_OVERRIDE
Without the default value this still causes a missing symbol. Disable by
default as it depends on FUNCTION_ERROR_INJECTION, which is disabled in
the generic config and we don't have a build symbol to enable that.

Fixes: 500c37c56f ("kernel: add missing symbol")
Signed-off-by: Stijn Tintel <stijn@linux-ipv6.be>
2023-03-05 18:36:01 +02:00
Robert Marko
721206a1b1 kernel: set default values for ARM low level debugging symbols
Set default values for KERNEL_DEBUG_LL and KERNEL_DEBUG_LL_UART_NONE again
as both of these symbols are non visible if KERNEL_EARLY_PRINTK is not
selected and KConfig wont write their value to .config.

This usually is the intended behaviour, but in OpenWrt we are relying on
the KConfig to set these and disable the debug console settings that
multiple targets like mvebu have set in their kernel config.
This was the behaviour before removing all of the "default n" settings
as KConfig by default considers symbols disabled but they are not visible
anymore and thus their value is not set in .config and build system then
later does not override the values from target kernel config.

So, to restore the behaviour to the previous one lets a default value for
KERNEL_DEBUG_LL and KERNEL_DEBUG_LL_UART_NONE.

Fixes: 8bc72ea7be ("treewide: strip useless default n Kconfig lines")
Tested-by: Georgi Valkov <gvalkov@gmail.com>
Signed-off-by: Robert Marko <robimarko@gmail.com>
2023-02-08 16:21:05 +01:00
Tony Butler
8bc72ea7be treewide: strip useless default n Kconfig lines
Kconfig docs say:
> The default value deliberately defaults to 'n' in order to avoid
> bloating the build.

Apply this rule everywhere, to avoid more cloning of bad examples

Signed-off-by: Tony Butler <spudz76@gmail.com>
2023-02-03 12:50:15 +01:00
Felix Fietkau
d02d455678 kernel: make it possible for packages to select page pool support
Will be used by the next mt76 update

Signed-off-by: Felix Fietkau <nbd@nbd.name>
2023-01-29 10:08:21 +01:00
Tony Butler
7e83cdf3f7 build: config: cleanup impossible dependency logic
some config `depends on` lines contained outdated kernel version checks
that can no longer happen and had become non-operational; clean them up

cosmetic change with no functional effect

Signed-off-by: Tony Butler <spudz76@gmail.com>
2022-12-03 20:45:55 +01:00
Felix Fietkau
6eeb5d4564 kernel: disable wireless extensions only when needed
They are only needed by a few very old drivers

Signed-off-by: Felix Fietkau <nbd@nbd.name>
2022-09-22 15:26:58 +02:00
Florian Fainelli
e7ec2d7399 kernel: add KERNEL_DEBUG_VIRTUAL
This option allows turning on CONFIG_DEBUG_VIRTUAL which is useful to
debug incorrect uses of the virtual to physical and physical to virtual
translations functions.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
2022-07-07 15:07:16 -07:00
Stijn Tintel
8f5c9a7d94 kernel: add KERNEL_BPF_EVENTS config option
This is required to use BPF maps of type BPF_MAP_TYPE_PERF_EVENT_ARRAY
for sending data from BPF programs to user-space for post-processing
or logging.

Signed-off-by: Stijn Tintel <stijn@linux-ipv6.be>
2022-05-18 13:32:06 +03:00
Tony Ambardar
531e0399cd build: add option KERNEL_DEBUG_INFO_BTF
Generate BTF (BPF Type Format) information from DWARF debug info. This is
embedded in the kernel and exported via sysfs as /sys/kernel/btf/vmlinux.
BTF data enhances kernel portability and introspection for BPF programs.

Selecting this also enables the dwarves host package which provides the
pahole tool used for BTF encoding.

Test using: "bpftool btf dump file /sys/kernel/btf/vmlinux format c"

This needs to depend on KERNEL_DEBUG_INFO_REDUCED not being set,
otherwise we can enable both KERNEL_DEBUG_INFO_BTF and
KERNEL_DEBUG_INFO_REDUCED, which will result in undefined behaviour.

Signed-off-by: Tony Ambardar <itugrok@yahoo.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
[split DEBUG_INFO_REDUCED into separate commit, add dependency]
Signed-off-by: Stijn Tintel <stijn@linux-ipv6.be>
2022-05-18 13:32:06 +03:00
Stijn Tintel
44bcad24b6 kernel: add DEBUG_INFO_REDUCED config option
Add DEBUG_INFO_REDUCED as a kernel config option and remove it from the
kernel configs. This is in preparation of the upcoming option to enable
BTF typeinfo, which is incompatible with DEBUG_INFO_REDUCED.

Signed-off-by: Stijn Tintel <stijn@linux-ipv6.be>
2022-05-18 13:32:06 +03:00
Stijn Tintel
d5dc6cdc53 kernel: add missing dependency to KERNEL_RPI_AXIPERF
This symbol is added by the bcm27xx target patches so it should depend
on that target.

Fixes: efd9463dcf ("kernel: add missing symbol for bcm27xx")
Signed-off-by: Stijn Tintel <stijn@linux-ipv6.be>
2022-05-18 13:31:05 +03:00
Stijn Tintel
efd9463dcf kernel: add missing symbol for bcm27xx
When KERNEL_PERF_EVENTS is enabled in OpenWrt, the RPI_AXIPERF symbol is
exposed. Add a build option for it to fix build failures with
KERNEL_PERF_EVENTS enabled.

Fixes: 20ea6adbf1 ("bcm27xx: add support for linux v5.15")
Signed-off-by: Stijn Tintel <stijn@linux-ipv6.be>
2022-05-17 20:54:25 +03:00
Stijn Tintel
500c37c56f kernel: add missing symbol
Enabling KERNEL_KPROBES exposes KERNEL_BPF_KPROBE_OVERRIDE. Add a build
option for it to fix build failures with KERNEL_KPROBES enabled.

Signed-off-by: Stijn Tintel <stijn@linux-ipv6.be>
2022-04-02 23:41:27 +03:00
Marek Behún
45d541bb40 kernel: add kmod-vrf
Add option to compile kmod-vrf, support for Virtual Routing and
Forwarding (Lite).

This module depends on NET_L3_MASTER_DEV, which is a boolean kernel
option, so we need to create a configuration option also for this, and
make kmod-vrf depend on it.

Signed-off-by: Marek Behún <kabel@kernel.org>
2022-02-01 22:59:09 +01:00
Matthew Hagan
033b6cef94 kernel: enhance multicast routing support
Certain utilities, such as smcroute [1], require additional multicast
routing options to be enabled, otherwise they will not function
correctly. Enable these relevant dependancies when IPv4 and/or IPv6
multicast routing are enabled.

[1] https://github.com/troglobit/smcroute/blob/master/README.md#linux-requirements

This increases the uncompressed kernel size on MIPS 24kc by 8KBytes
and the compressed kernel size by 1.8KBytes.

Signed-off-by: Matthew Hagan <mnhagan88@gmail.com>
2022-01-08 00:48:39 +01:00
Jianhui Zhao
43b498f669 kernel: remove non-existent config symbols
The crashlog patch as not ported to kernel 5.4.

Fixes: 4e0c54bc5b ("kernel: add support for kernel 5.4")
Signed-off-by: Jianhui Zhao <zhaojh329@gmail.com>
2021-11-20 18:53:14 +01:00
Stijn Tintel
38106a484c kernel: add missing symbol
Enabling KERNEL_FTRACE exposes the HIST_TRIGGERS triggers symbol. Add a
build option for it to fix build failures with KERNEL_FTRACE enabled.

Signed-off-by: Stijn Tintel <stijn@linux-ipv6.be>
2021-11-15 03:13:43 +02:00
Stijn Tintel
786cbf0fa4 kernel: fix KERNEL_KASAN_VMALLOC build option
It should be config, not CONFIG.

Fixes: cbeab2cd99 ("kernel: add another missing KASAN symbol")
Signed-off-by: Stijn Tintel <stijn@linux-ipv6.be>
2021-11-07 18:57:12 +02:00
Stijn Tintel
0ccbcb0223 kernel: add missing keyword to KERNEL_KASAN_VMALLOC
The help keyword is missing, which breaks menuconfig etc.

Fixes: cbeab2cd99 ("kernel: add another missing KASAN symbol")

Signed-off-by: Stijn Tintel <stijn@linux-ipv6.be>
2021-11-07 18:55:17 +02:00
Stijn Tintel
cbeab2cd99 kernel: add another missing KASAN symbol
Enabling KERNEL_KASAN exposes yet another missing symbol. This did not
appear on bcm27xx but is appearing now on x86/64. Add a new kernel build
option for KASAN_VMALLOC to fix build on x86/64 with KERNEL_KASAN
enabled.

Signed-off-by: Stijn Tintel <stijn@linux-ipv6.be>
Acked-by: Hauke Mehrtens <hauke@hauke-m.de>
2021-11-07 18:38:16 +02:00
Stijn Tintel
c5fa7ec2a6 kernel: add missing UBSAN config symbols
Enabling KERNEL_UBSAN exposes several missing symbols. Add new kernel
build options for UBSAN_BOUNDS and UBSAN_TRAP, disable CONFIG_TEST_UBSAN
in the generic kernel configs and enable CONFIG_UBSAN_MISC in generic
5.10 config. The latter symbol was removed in later kernels, as it was
causing some issues, so just disable it in 5.10 instead of adding a
build option for it.

Fixes build failures with KERNEL_UBSAN enabled.

Signed-off-by: Stijn Tintel <stijn@linux-ipv6.be>
Acked-by: Hauke Mehrtens <hauke@hauke-m.de>
2021-11-07 17:38:01 +02:00
Stijn Tintel
ec68c75c62 kernel: add missing KASAN config symbols
Enabling KERNEL_KASAN exposes several missing symbols. As KASAN_SW_TAGS
is only implemented for arm64 CPUs and requires clang, it doesn't make
sense to make this a build option so just default to KASAN_GENERIC and
disable KASAN_SW_TAGS.

While at it, disable TEST_KASAN_MODULE in the generic 5.10 config.

Fixes build failures with KERNEL_KASAN enabled.

Signed-off-by: Stijn Tintel <stijn@linux-ipv6.be>
Acked-by: Hauke Mehrtens <hauke@hauke-m.de>
2021-11-07 17:26:47 +02:00
Josh Soref
323bd7b0f5 build: fix various typos
Fix typos in comment and user-facing help text.

Signed-off-by: Josh Soref <jsoref@users.noreply.github.com>
[split out config changes, adjust commit message]
Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
2021-10-31 21:24:47 +01:00
Hauke Mehrtens
d27f6e2c5d build: Replace KERNEL_LOCKUP_DETECTOR with KERNEL_SOFTLOCKUP_DETECTOR
The LOCKUP_DETECTOR configuration option split into the
SOFTLOCKUP_DETECTOR and HARDLOCKUP_DETECTOR configuration option some
time ago. The HARDLOCKUP_DETECTOR option is only working on some
architectures, but SOFTLOCKUP_DETECTOR should work everywhere. Replace
KERNEL_LOCKUP_DETECTOR with KERNEL_SOFTLOCKUP_DETECTOR.

LOCKUP_DETECTOR will be selected by SOFTLOCKUP_DETECTOR automatically.

Fixes: b951f53fba ("build: Add additional kernel debug options")
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
2021-09-13 13:04:21 +02:00
Paul Spooren
a17b8eaa2e build: use SPDX license tags
The license folder is a core part of OpenWrt and all GPL-2.0 licensed.
Use SPDX license tags to allow machines to check licenses.

Signed-off-by: Paul Spooren <mail@aparcar.org>
[rebase, keep some Copyright lines, sharpen commit message]
Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
2021-02-05 14:54:47 +01:00
Daniel Golle
a21be2a703 kernel: add defaults for new SELinux options
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
2021-02-05 13:17:49 +00:00
Tony Ambardar
af20332dec config: drop CONFIG_KPROBE_EVENT unused since kernel 4.9
The config setting was renamed to CONFIG_KPROBE_EVENTS.

Fixes: 97d3f800a8 ("config: kernel: Add KPROBE_EVENTS config option)
Signed-off-by: Tony Ambardar <itugrok@yahoo.com>
2021-01-25 14:37:41 +01:00
Rui Salvaterra
412dc26c99 kernel: make lwtunnel support optional
Not everyone will want to bloat their kernel by 24 kiB for such a niche
feature.

Fixes: a1a7f3274e "kernel: enable SRv6 support by
enabling lwtunnel"

Signed-off-by: Rui Salvaterra <rsalvaterra@gmail.com>
2021-01-14 22:38:39 -10:00
Andy Walsh
9afbf33b60 kernel: drop unneeded kernel version dependency
The current master only supports kernel 5.4, and there is no reason
to remove KERNEL_IO_URING for future kernels.

Drop the unneeded dependency.

Signed-off-by: Andy Walsh <andy.walsh44+github@gmail.com>
[improve commit title/message]
Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
2021-01-14 01:23:16 +01:00
Nick Hainke
a1a7f3274e kernel: enable SRv6 support by enabling lwtunnel
Enable the ability to use segment routing based on IPv6. It allows the
packet to specify a path that the packet should take through the
network.

Lwtunnel allow an easy encapsulation of a package. You can just install
ip-full package and use it:

  ip -6 route add  2003::/64 dev eth0 encap seg6 mode encap \
    segs 2001::1,2002::2

An IPv6 package looks like this:
  [IPv6 HDR][IPv6 RH][IPv6 HDR][Data...]

Netifd support:
  https://git.openwrt.org/?p=project/netifd.git;
     a=commit;h=458b1a7e9473c150a40cae5d8be174f4bb03bd39

Increases imagesize by 24.125 KiB. Therefore, only enable for devices
with enough flash.

Signed-off-by: Nick Hainke <vincent@systemli.org>
2021-01-11 11:09:05 -10:00
Nick Hainke
4943bc5cff kernel: only strip proc for small flash devices
Currently, you are not able to get statistics about IPv4 and IPv6
usage. This information can be collected via the snmp and snmp6.
However, in the current state this interface is disabled as you can
read in the "902-debloat_proc.patch":
 "Strip non-essential /proc functionality to reduce code size"

Tools like netstat use the snmp/6 interface to collect interface
statistics. Some prometheus exporters also mention this:
- prometheus-collectors/netstat.lua
- prometheus-collectors/snmp6 (still a PR)
- collectd/snmp6 (still a PR)

PRs:
- https://github.com/collectd/collectd/pull/3789
- https://github.com/openwrt/packages/pull/14158

Instead of enabling it as default for all devices we condition it
 default y if SMALL_FLASH

A test shows it needs around 16 kiB.

Signed-off-by: Nick Hainke <vincent@systemli.org>
[fixed whitespace issue]
Signed-off-by: Petr Štetiar <ynezz@true.cz>
2020-12-22 19:11:50 +01:00
Andy Walsh
9361964a3a kernel: add KERNEL_IO_URING option
* add KERNEL_IO_URING option

NOTES:
Adds configurable support for the io_uring interface (CONFIG_IO_URING) via KERNEL_IO_URING option.

The kernel only zImage grows by about 5-9KB ?

I would like to enable this by default for all 5.4 kernels, so i can use the new io_uring samba-4.12.x vfs module by default.

The associated liburing was already submitted and merged.
The kernel + liburing was tested on ARM/mvebu via samba4 vfs_io_uring module and i have no issues so far.

Some extra reads on it and why we should enable it by default, since i expect more packages to use this in the future.
https://wiki.samba.org/index.php/Samba_4.12_Features_added/changed#.27io_uring.27_vfs_module
https://lwn.net/Articles/810414/
https://kernel.dk/io_uring.pdf
https://www.phoronix.com/scan.php?page=news_item&px=Linux-5.6-IO-uring-Tests

Signed-off-by: Andy Walsh <andy.walsh44+github@gmail.com>
2020-12-22 19:11:50 +01:00
Hauke Mehrtens
1926ffb5ab build: Add IRQSOFF and PREEMPT TRACER kernel config option
This adds the CONFIG_IRQSOFF_TRACER and the CONFIG_PREEMPT_TRACER kernel
configuration option to the OpenWrt menu. This can be used to debug
latencies in the system.
The CONFIG_PREEMPT_TRACER option needs the CONFIG_PREEMPT option which is
supposed to be used for Low-Latency Desktop and not used by many targets
in OpenWrt.

The help text is copied from the Linux kernel Kconfig.

Signed-off-by: Hauke Mehrtens <hmehrtens@maxlinear.com>
2020-12-16 22:11:19 +01:00
Daniel Golle
23049f9c31 kernel: enable kernel keyring by default on !SMALL_FLASH
Enable CONFIG_KEYS by default on systems which are not marked as
flash-space constraint by the 'small_flash' feature.
CONFIG_KEYS is required by Docker, enabling it in our kernel allows
users to run Docker on stock OpenWrt.
It is also used of by some network file systems (such as NFSv4) to
store credentials as well as UID/GID mappings.

Adds about 50kB to vmlinux on ath79/generic (~18kB compressed)

Signed-off-by: Daniel Golle <daniel@makrotopia.org>
2020-12-14 17:26:45 +00:00
Daniel Golle
7b85dd3788 kernel: update and clean kernel keyring options
Add KERNEL_KEYS_REQUEST_CACHE option.
'tristate' (ie. module builds) are not valid in Config-kernel.in, hence
remove tristate KERNEL_ENCRYPTED_KEYS. It will be readded as a kernel
module in a follow-up commit.

Fixes: 39d817cf38 ("Add config symbols for kernel keyring support")
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
2020-12-14 17:25:14 +00:00
Hauke Mehrtens
f6d1adbafb kernel: Activate KERNEL_MIPS_FP_SUPPORT for pistachio target
The pistachio target uses a MIPS CPU with FPU and OpenWrt uses a
toolchain with hard FPU support. MIPS FPU support needs the FPU
emulation code in the kernel.

Fixes: ac5671f46c ("kernel: remove obsolete kernel version switches for 4.19")
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
2020-11-01 20:54:37 +01:00
Adrian Schmutzler
ac5671f46c kernel: remove obsolete kernel version switches for 4.19
This removes switches dependent on kernel version 4.19 as well as
several packages/modules selected only for that version.

Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
2020-10-30 19:44:41 +01:00
Daniel Golle
ba9b6702aa config: clean up SELinux options
In order to make it easier for users to build with SELinux, have a
single option in 'Global build settings' to enable all necessary
kernel features, userland packages and build-system hooks.
Also add better descriptions and help messages while at it.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>
2020-10-16 14:29:48 +01:00
Paul Spooren
f922a3e00e config: add KERNEL_LSM symbol
The LSM (Linux security mechanism) list is the successor of the now
legacy *major LSM*. Instead of defining a single security mechanism the
LSM symbol is a comma separated list of mechanisms to load.

Until recently OpenWrt would only support DAC (Unix discretionary access
controls) which don't require an additional entry in the LSM list. With
the newly introduced SELinux support the LSM needs to be extended else
only a manual modified Kernel cmdline (`security=selinux`) would
activate SELinux.

As the default OpenWrt Kernel config sets DAC as default security
mechanism, SELinux is stripped from the LSM list, even if
`KERNEL_DEFAULT_SECURITY_SELINUX` is activated. To allow SELinux without
a modified cmdline this commit sets a specific LSM list if
`KERNEL_SECURITY_SELINUX` is enabled.

The upstream Kconfig adds even more mechanisms
(smack,selinux,tomoyo,apparmor), but until they're ported to OpenWrt,
these can be ignored.

To compile SELinux Kernel support but disable it from loading, the
already present options `KERNEL_SECURITY_SELINUX_DISABLE` or
`KERNEL_SECURITY_SELINUX_BOOTPARAM` (with custom cmdline `selinux=0`)
can be used. Further it's possible to edit `/etc/selinux/config`.

Signed-off-by: Paul Spooren <mail@aparcar.org>
2020-09-03 14:14:33 +01:00
Adrian Schmutzler
6362a04725 kernel: remove obsolete kernel version switches for 4.14
This removes switches dependent on kernel version 4.14 as well as
several packages/modules selected only for that version.

This also removes sched-cake-virtual, which is not required anymore
now that we have only one variant of cake.

Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
2020-09-02 16:29:23 +02:00
Thomas Petazzoni
168faef443 kernel: add options needed for SELinux
This adds a number of options to config/Config-kernel.in so that
packages related to SELinux support can enable the appropriate Linux
kernel support.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
[rebase; add ext4, F2FS, UBIFS, and JFFS2 support; add commit message]
Signed-off-by: W. Michael Petullo <mike@flyn.org>
2020-08-31 01:15:41 +01:00
Yuan Tao
ba2ddba56b config: kernel: fix missed CGROUP_HUGETLB symbol
The symbol KERNEL_CGROUP_HUGETLB is always used whenever KERNEL_CGROUPS is enabled.
The absence of this notation will cause the user to be asked to enter this parameter the first time it is compiled.

Signed-off-by: Yuan Tao <ty@wevs.org>
2020-08-24 01:09:30 +01:00
Daniel Golle
42abe56f1b kernel: further clean-up options and defaults
Remove `if !SMALL_FLASH` in places which are anyway already augmented
by `if !SMALL_FLASH`.
Always enable CONFIG_BLK_DEV_THROTTLING on !SMALL_FLASH devices rather
than just enabling it on bcm27xx.
Enabled CPU bandwidth provisioning for FAIR_GROUP_SCHED on !SMALL_FLASH
devices as CONFIG_FAIR_GROUP_SCHED is already enabled and becomes more
useful for cgroups with that option enbled as well.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>
2020-08-10 09:54:14 +01:00
Stijn Tintel
5c3e83fa88 kernel: fix missing TRANSPARENT_HUGEPAGE symbols
Enabling KERNEL_TRANSPARENT_HUGEPAGE exposes 2 missing symbols:
* CONFIG_READ_ONLY_THP_FOR_FS
* TRANSPARENT_HUGEPAGE_ALWAYS
* TRANSPARENT_HUGEPAGE_MADVISE

The first one was added in 5.4, and is marked experimental there so just
disable it in the generic config.

For the latter two, we should not force the user to use either of them,
so add them as build-configurable kernel options.

Fixes: d1a8217d87 ("kernel: clean-up build-configurable kernel config symbols")
Signed-off-by: Stijn Tintel <stijn@linux-ipv6.be>
2020-08-01 14:33:46 +01:00
Daniel Golle
9950bc92e3 kernel: add menuconfig entry for kernel CONFIG_CGROUP_NET_CLASSID
It was removed from target defaults though it didn't exist in the
build-systems kernel configuration options. Add it there.

Fixes: d1a8217d87 ("kernel: clean-up build-configurable kernel config symbols")
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
2020-07-31 22:50:38 +01:00
Daniel Golle
d1a8217d87 kernel: clean-up build-configurable kernel config symbols
Don't explicitely disable options in target/linux/generic/config-* if
they are already controlled in config/Config-kernel.in.
Add a bunch of new symbols  and prepare defaults for using only unified
hierarchy (ie. cgroup2). Update symbol dependencies while at it

Signed-off-by: Daniel Golle <daniel@makrotopia.org>
2020-07-30 16:59:47 +01:00
Javier Marcet
caf09f2b84 kernel: rename CONFIG_NETPRIO_CGROUP to CONFIG_CGROUP_NET_PRIO
This has been changed in kernel 3.14.

Signed-off-by: Javier Marcet <javier@marcet.info>
2020-06-27 00:19:13 +02:00
Chen Minqiang
ec5e8461c1 x86: make crashdump works
1. KERNEL_CRASH_DUMP should depends on KERNEL_PROC_KCORE (kexec use it)
2. select crashkernel mem size by totalmem
   mem <= 256M disable crashkernel by default
   mem >= 4G use 256M for crashkernel
   mem >= 8G use 512M for crashkernel
   default use 128M
3. set BOOT_IMAGE in kdump.init
4. resolve a "Unhandled rela relocation: R_X86_64_PLT32" error

Tested on x86_64

Signed-off-by: Chen Minqiang <ptpt52@gmail.com>
2020-03-20 21:45:06 +00:00
Hauke Mehrtens
69d179ec81 kernel: Use new symbol to deactivate MIPS FPU support
With kernel 5.4 the upstream kernel supports deactivating the FPU
support on MIPS. Use this new upstream feature instead of our older
patch which was removed when porting the kernel patches to kernel 5.4.

This way both options are set which should work for older kernel
versions and also new ones.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
2020-02-28 17:50:46 +01:00
Hauke Mehrtens
b951f53fba build: Add additional kernel debug options
Make it possible to activate some additional kernel debug options.
This can be used to debug some problems in kernel drivers.

Signed-off-by: Hauke Mehrtens <hauke.mehrtens@intel.com>
Reviewed-by: Alexandru Ardelean <ardeleanalex@gmail.com>
2020-02-22 16:34:57 +01:00