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Richard Weinberger 63b3c44d27 Add support for erofs filesystems 
Since Linux 5.4 a new read-only filesystem is available, erofs.
Compared to squashfs it offers much better read performance with and
without compression enabled.
It suppports two optional compressors, lz4 and lz4hc.

>From the mkfs.erofs man page:
EROFS is a new enhanced lightweight linux read-only filesystem with
modern designs (eg. no buffer head, reduced metadata, inline
xattrs/data, etc.) for scenarios which need high-performance read-only
requirements, e.g. Android OS for smartphones and LIVECDs.
It also provides fixed-sized output compression support, which improves
storage density, keeps relatively higher compression ratios, which is
more useful to achieve high performance for embedded devices with
limited  memory since it has unnoticable memory overhead and page cache
thrashing.

This commit adds support for three new filesystem targets:
erofs: erofs without compression
erofs-lz4: erofs with lz4 compresssion enabled
erofs-lz4hc: erofs with lz4hc compression enabled

(From OE-Core rev: 41dead1ff8ccc49e6cd6e6f5d41a59d164693e0d)

Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
2021-05-31 14:31:01 +01:00
bitbake bitbake: server/process: Handle error in heartbeat funciton in OOM case 2021-05-18 23:53:15 +01:00
contrib contrib/git-hooks: add a sendemail-validate example hook that adds FROM: lines to outgoing patch emails 2020-12-30 14:01:07 +00:00
documentation releases: update to include 3.3.1 2021-05-25 22:26:34 +01:00
meta Add support for erofs filesystems 2021-05-31 14:31:01 +01:00
meta-poky local.conf: Drop support for mklibs 2021-05-18 23:53:47 +01:00
meta-selftest layer.conf: Update to add post 3.3 release honister series 2021-04-18 11:37:24 +01:00
meta-skeleton baremetal-helloworld: Enable RISC-V 64 port 2021-05-12 23:06:04 +01:00
meta-yocto-bsp meta-yocto-bsp: beaglebone: Set a fixed size for boot partition in WIC image 2021-03-23 22:52:09 +00:00
scripts Add support for erofs filesystems 2021-05-31 14:31:01 +01:00
.gitignore bitbake: gitignore: ignore runqueue-tests/bitbake-cookerdaemon.log 2021-03-12 16:47:12 +00:00
.templateconf meta-yocto: Rename to meta-poky to better match its purpose 2016-02-28 11:31:17 +00:00
LICENSE meta/lib+scripts: Convert to SPDX license headers 2019-05-09 16:31:55 +01:00
LICENSE.GPL-2.0-only meta/lib+scripts: Convert to SPDX license headers 2019-05-09 16:31:55 +01:00
LICENSE.MIT meta/lib+scripts: Convert to SPDX license headers 2019-05-09 16:31:55 +01:00
Makefile bitbake: sphinx: rename Makefile.sphinx 2020-10-06 13:54:27 +01:00
MEMORIAM MEMORIAM: Add recognition for contributors no longer with us 2020-01-30 15:22:35 +00:00
oe-init-build-env meta/lib+scripts: Convert to SPDX license headers 2019-05-09 16:31:55 +01:00
README.hardware meta-yocto: Restructure and tidy up READMEs 2017-09-14 13:36:22 +01:00
README.OE-Core README: Rename to README.OE-Core so its clear where its from/belongs/is about 2019-03-06 23:09:10 +00:00
README.poky meta-yocto: Restructure and tidy up READMEs 2017-09-14 13:36:22 +01:00
README.qemu README.qemu: qemuppc64 is not supported 2017-10-16 23:54:31 +01:00

README.qemu 

QEMU Emulation Targets
======================

To simplify development, the build system supports building images to
work with the QEMU emulator in system emulation mode. Several architectures
are currently supported in 32 and 64 bit variants:

  * ARM (qemuarm + qemuarm64)
  * x86 (qemux86 + qemux86-64)
  * PowerPC (qemuppc only)
  * MIPS (qemumips + qemumips64)

Use of the QEMU images is covered in the Yocto Project Reference Manual.
The appropriate MACHINE variable value corresponding to the target is given
in brackets.