"Session ID: BUD17-221 Session Name: What's new in QEMU - BUD17-221 Speaker: Alex Bennée Track: Virtualization ★ Session Summary ★ This session will cover new features and additions to QEMU that happened over the last year, ranging from new features for KVM support to Multi-Threaded TCG (MTTCG) and QEMU linux-user improvements. We will also discuss upcoming work to support LITE and IoT development and hope for a healthy discussion on requirements for members interested in these areas. --------------------------------------------------- ★ Resources ★ Event Page: http://connect.linaro.org/resource/bud17/bud17-221/ Presentation: https://www.slideshare.net/linaroorg/bud17221-whats-new-in-qemu Video: https://youtu.be/4MKXWM0koGw --------------------------------------------------- ★ Event Details ★ Linaro Connect Budapest 2017 (BUD17) 6-10 March 2017 Corinthia Hotel, Budapest, Erzsébet krt. 43-49, 1073 Hungary --------------------------------------------------- Keyword: QEMU, virtualization http://www.linaro.org http://connect.linaro.org --------------------------------------------------- Follow us on Social Media https://www.facebook.com/LinaroOrg https://twitter.com/linaroorg https://www.youtube.com/user/linaroorg?sub_confirmation=1 https://www.linkedin.com/company/1026961"

1. What'snewinQEMU
AlexBennée
LinaroConnectBUD17-221
1

2. Budapest 2017
Agenda
QEMU releases & new features
IoT/uController discussion
2. 1

3. Budapest 2017
SinceLastConnect
QEMU 2.8.0 (Dec 20th, 2016)
QEMU 2.9.0 (April 4th, 2017)*
Releases at 3-4 month cadence
Next release in August?
3 . 1

4. Budapest 2017
QEMU2.8
See for full noteschangelog
4. 1

5. Budapest 2017
ITS(InterruptTranslationService)
MSI controller
Virtual MSIs with VMs with GICv3
Required on GICv3 guests for
VHOST
Device pass-through (SR-IOV)
4. 2

6. Budapest 2017
TCGUpdates
New TCGOps for:
Atomic operations
Barriers/fences
4. 3

7. Budapest 2017
Newexclusivemechanism
Support oversized atomics
Thread safe tb- ush ( nally!)
4. 4

8. Budapest 2017
What'snewinQEMU2.9
See for full noteschangelog
5 . 1

9. Budapest 2017
TCGEL2Support
AArch64 only
Requires GICv3
qemu-system-aarch64 ${QEMU_OPTS}
-machine gic-version=3
-machine virtualization=true
5 . 2

10. Budapest 2017
MTTCG
Finally thread-per-vCPU for system emulation!
Long term project involving many groups
Linaro has been leading the work for a year
5 . 3

11. Budapest 2017
MTTCGSupportedCombinations
Default for ARMv7/AArch64 on x86_64
Known to work for
x86-on-x86
x86-on-AArch64 (slowly)
${QEMU} ${QEMU_OPTS} -accel tcg,thread=multi
5 . 4

12. Budapest 2017
CortexM xes
5 . 5

13. Budapest 2017
QEMUandIoT
6 . 1

14. Budapest 2017
M-pro lecoresaredi erent
M-pro le means micro-controllers
Di erent memory model (MPU)
Di erent memory model (MPU)
Di erent exception model (NVIC)
Often running an RTOS
7 . 1

15. Budapest 2017
CurrentM-pro lemodels
TI Stellaris (Cortex M3)
LM3S6965EVB
LM3S811EVB
Netduino 2 (Cortex M3)
8. 1

16. Budapest 2017
CurrentIssues
Very little attention
Linaro has been very focused on A-pro le
No community maintenance and little bug xing
Long standing un- xed bugs
Missing important features
No support for newer CPUs (FPU, v6M)
9 . 1

17. Budapest 2017
ModellingHardware
Boring hardware
mostly just CPU, ash and GPIOs
some models may have a screen
Unconnected GPIO/PWM/ADC/DACs
10 . 1

18. Budapest 2017
Ongoingwork
NVIC/Exception handling ( xed in 2.9)
Bare metal
MPU (add missing emulation)
FPU (enable existing instructions, new exception
model)
v6m (Cortex M0, M0+1, M1) and v8m
m-series tests
11 . 1

19. Budapest 2017
WhatdomemberswantfromQEMUIoTsupport
Priorities
Use cases?
Hardware?
Other requirements?
12. 1

20. Budapest 2017
SomeoptionsfornewM-pro leboard?
Cortex-M0
number of built-in peripherals
widespread real hardware
Cortex-M4
built in Bluetooth
supports Zephyr
BBC microBit
96boards Carbon
13 . 1

21. ThankYou
#BUD17
For further information: www.linaro.org
BUD17 keynotes and videos on: connect.linaro.org
14. 1