payloads/external/LinuxBoot: Clean up

There were some issues with the current Linuxboot Makefiles.
- multithreaded compilation didn't work, because some prerequisites
  were missing
- initramfs wasn't added for x86 qemu boot.
- riscv support was incomplete

It began with separate patches, but resulted in a clean up patch, that
is hard to separate. The most important changes are the following:
- Instead of phony targets, actual files are now used as prerequisites
- riscv can now be used as target
- initramfs works now also for x86
- instead of querying the most recent version from the internet, I set a
  known working version (because I tested it) that can be customized
  and/or upgraded in the future. The reasons:
      - querying the version from the internet requires a constant
        connection to the internet even after linux kernel is already
        build (aka subsequent builds).
      - one usually wants to use a known working version, but optionally
        still have the posibillity to choose a custom one. This patch
        introduces this possibility in its most simple form.
- I removed as much ifeq statements as possible and moved that
  responsibility to Kconfig, because they tend to make the
  Makefile less readable.

Signed-off-by: Maximilian Brune <maximilian.brune@9elements.com>
Change-Id: I25e757108e0dd473969fe5a192ad0733f1fe6286
Reviewed-on: https://review.coreboot.org/c/coreboot/+/76150
Reviewed-by: Lean Sheng Tan <sheng.tan@9elements.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

1 files changed, 147 insertions, 0 deletions

diff --git a/payloads/external/LinuxBoot/i386/defconfig b/payloads/external/LinuxBoot/i386/defconfig
new file mode 100644
index 0000000000..6c20c145cd
--- /dev/null
+++ b/payloads/external/LinuxBoot/i386/defconfig
@@ -0,0 +1,147 @@
+# CONFIG_64BIT is not set
+# CONFIG_LOCALVERSION_AUTO is not set
+CONFIG_KERNEL_XZ=y
+# CONFIG_SWAP is not set
+CONFIG_SYSVIPC=y
+CONFIG_POSIX_MQUEUE=y
+# CONFIG_USELIB is not set
+CONFIG_NO_HZ_IDLE=y
+CONFIG_HIGH_RES_TIMERS=y
+CONFIG_BLK_DEV_INITRD=y
+# CONFIG_RD_GZIP is not set
+# CONFIG_RD_BZIP2 is not set
+# CONFIG_RD_LZMA is not set
+CONFIG_CC_OPTIMIZE_FOR_SIZE=y
+# CONFIG_MULTIUSER is not set
+# CONFIG_SYSFS_SYSCALL is not set
+# CONFIG_BUG is not set
+# CONFIG_PCSPKR_PLATFORM is not set
+# CONFIG_BASE_FULL is not set
+# CONFIG_AIO is not set
+# CONFIG_KALLSYMS is not set
+CONFIG_BPF_SYSCALL=y
+CONFIG_USERFAULTFD=y
+CONFIG_EMBEDDED=y
+# CONFIG_VM_EVENT_COUNTERS is not set
+# CONFIG_COMPAT_BRK is not set
+CONFIG_SLOB=y
+# CONFIG_SLAB_MERGE_DEFAULT is not set
+CONFIG_GCC_PLUGINS=y
+CONFIG_GCC_PLUGIN_LATENT_ENTROPY=y
+CONFIG_GCC_PLUGIN_STRUCTLEAK=y
+CONFIG_GCC_PLUGIN_STRUCTLEAK_BYREF_ALL=y
+CONFIG_GCC_PLUGIN_RANDSTRUCT=y
+CONFIG_CC_STACKPROTECTOR_STRONG=y
+CONFIG_ARCH_MMAP_RND_BITS=16
+CONFIG_REFCOUNT_FULL=y
+CONFIG_PARTITION_ADVANCED=y
+# CONFIG_IOSCHED_DEADLINE is not set
+# CONFIG_IOSCHED_CFQ is not set
+# CONFIG_MQ_IOSCHED_DEADLINE is not set
+# CONFIG_MQ_IOSCHED_KYBER is not set
+# CONFIG_ZONE_DMA is not set
+# CONFIG_X86_FAST_FEATURE_TESTS is not set
+# CONFIG_X86_MPPARSE is not set
+# CONFIG_X86_EXTENDED_PLATFORM is not set
+# CONFIG_SCHED_OMIT_FRAME_POINTER is not set
+# CONFIG_DMI is not set
+CONFIG_PREEMPT=y
+# CONFIG_X86_MCE is not set
+# CONFIG_MICROCODE is not set
+CONFIG_SPARSEMEM_MANUAL=y
+# CONFIG_COMPACTION is not set
+# CONFIG_MTRR is not set
+# CONFIG_X86_INTEL_UMIP is not set
+CONFIG_KEXEC=y
+# CONFIG_RELOCATABLE is not set
+# CONFIG_MODIFY_LDT_SYSCALL is not set
+# CONFIG_SUSPEND is not set
+CONFIG_PM=y
+CONFIG_WQ_POWER_EFFICIENT_DEFAULT=y
+# CONFIG_ACPI_REV_OVERRIDE_POSSIBLE is not set
+# CONFIG_ACPI_AC is not set
+# CONFIG_ACPI_BATTERY is not set
+# CONFIG_ACPI_BUTTON is not set
+# CONFIG_ACPI_FAN is not set
+# CONFIG_ACPI_PROCESSOR is not set
+# CONFIG_ACPI_TABLE_UPGRADE is not set
+CONFIG_CPU_FREQ=y
+CONFIG_CPU_FREQ_DEFAULT_GOV_POWERSAVE=y
+# CONFIG_CPU_IDLE is not set
+CONFIG_PCIEPORTBUS=y
+CONFIG_PCIEASPM_POWER_SUPERSAVE=y
+CONFIG_PCI_MSI=y
+# CONFIG_BINFMT_SCRIPT is not set
+# CONFIG_COREDUMP is not set
+CONFIG_NET=y
+CONFIG_PACKET=y
+CONFIG_UNIX=y
+CONFIG_INET=y
+# CONFIG_INET_XFRM_MODE_TRANSPORT is not set
+# CONFIG_INET_XFRM_MODE_TUNNEL is not set
+# CONFIG_INET_XFRM_MODE_BEET is not set
+# CONFIG_IPV6 is not set
+# CONFIG_WIRELESS is not set
+# CONFIG_UEVENT_HELPER is not set
+CONFIG_DEVTMPFS=y
+CONFIG_DEVTMPFS_MOUNT=y
+# CONFIG_STANDALONE is not set
+# CONFIG_FW_LOADER is not set
+# CONFIG_ALLOW_DEV_COREDUMP is not set
+# CONFIG_PNP_DEBUG_MESSAGES is not set
+CONFIG_BLK_DEV_LOOP=y
+CONFIG_BLK_DEV_SD=y
+# CONFIG_SCSI_LOWLEVEL is not set
+CONFIG_ATA=y
+CONFIG_SATA_AHCI=y
+CONFIG_MD=y
+CONFIG_BLK_DEV_DM=y
+CONFIG_DM_CRYPT=y
+CONFIG_HW_RANDOM_TIMERIOMEM=y
+# CONFIG_HW_RANDOM_AMD is not set
+# CONFIG_HW_RANDOM_VIA is not set
+# CONFIG_DEVPORT is not set
+CONFIG_I2C=y
+CONFIG_POWER_SUPPLY=y
+# CONFIG_HWMON is not set
+CONFIG_THERMAL=y
+# CONFIG_USB_SUPPORT is not set
+# CONFIG_X86_PLATFORM_DEVICES is not set
+# CONFIG_FIRMWARE_MEMMAP is not set
+CONFIG_GOOGLE_FIRMWARE=y
+CONFIG_GOOGLE_COREBOOT_TABLE_ACPI=y
+CONFIG_GOOGLE_MEMCONSOLE_COREBOOT=y
+CONFIG_GOOGLE_VPD=y
+CONFIG_EXT4_FS=y
+# CONFIG_FILE_LOCKING is not set
+# CONFIG_DNOTIFY is not set
+# CONFIG_INOTIFY_USER is not set
+CONFIG_TMPFS=y
+CONFIG_SQUASHFS=y
+# CONFIG_SQUASHFS_ZLIB is not set
+CONFIG_SQUASHFS_XZ=y
+# CONFIG_NETWORK_FILESYSTEMS is not set
+# CONFIG_ENABLE_WARN_DEPRECATED is not set
+# CONFIG_ENABLE_MUST_CHECK is not set
+CONFIG_FRAME_WARN=1024
+# CONFIG_UNUSED_SYMBOLS is not set
+# CONFIG_SECTION_MISMATCH_WARN_ONLY is not set
+# CONFIG_SCHED_DEBUG is not set
+# CONFIG_DEBUG_PREEMPT is not set
+# CONFIG_FTRACE is not set
+CONFIG_STRICT_DEVMEM=y
+CONFIG_IO_STRICT_DEVMEM=y
+# CONFIG_X86_VERBOSE_BOOTUP is not set
+# CONFIG_EARLY_PRINTK is not set
+# CONFIG_DOUBLEFAULT is not set
+CONFIG_OPTIMIZE_INLINING=y
+# CONFIG_X86_DEBUG_FPU is not set
+CONFIG_UNWINDER_GUESS=y
+CONFIG_SECURITY_DMESG_RESTRICT=y
+CONFIG_FORTIFY_SOURCE=y
+# CONFIG_CRYPTO_ECHAINIV is not set
+CONFIG_CRYPTO_SHA256=y
+CONFIG_CRYPTO_ANSI_CPRNG=y
+CONFIG_CRYPTO_JITTERENTROPY=y
+# CONFIG_CRYPTO_HW is not set
+# CONFIG_VIRTUALIZATION is not set