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Ross Burton f3be15a8a0 gcc: mitigate the Straight-line Speculation attack
Straight-line Speculation is a SPECTRE-like attack on Armv8-A, further
details can be found in the white paper here:

https://developer.arm.com/support/arm-security-updates/speculative-processor-vulnerability/downloads/straight-line-speculation

Backport the GCC patches to mitigate the attack.

CVE: CVE-2020-13844

(From OE-Core rev: 406a1636e1111729e3bb0fe804ef28c8a51c22e3)

Signed-off-by: Ross Burton <ross.burton@arm.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
2020-10-30 17:23:19 +00:00

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.
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