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[Qemu-devel] [Bug 1824768] Re: Qemu ARMv7 TCG MultiThreading for i386 gu
From: |
TimeMaster |
Subject: |
[Qemu-devel] [Bug 1824768] Re: Qemu ARMv7 TCG MultiThreading for i386 guest doesn't work |
Date: |
Mon, 22 Apr 2019 15:18:27 -0000 |
>> ./qemu-system-i386 -cdrom alpine.iso --accel tcg,thread=multi
I tried both, with -smp 4 and without..
In stable Qemu release, there is just a guest kernel panic, in
v4.0.0-rc3-dirty, there is also Illegal instruction error reported
> on an x-gene system, compiled for aarch32.
Yes, this should be Raspberry Pi 3, but I am not sure. Anyway, I can test this
in one week when I receive one of those boards.
>Just so we're clear, which raspberry pi revision are you using?
>Based on comments I'm assuming pi 2, with the 4 core cortex-a7.
I am using Raspberry Pi 2, 4 cores, not sure where is the difference
between cortex-a7 and ARMv7, in my case it is just ARMv7.
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https://bugs.launchpad.net/bugs/1824768
Title:
Qemu ARMv7 TCG MultiThreading for i386 guest doesn't work
Status in QEMU:
Incomplete
Bug description:
Using any Linux image (in this case Alpine Linux iso) I want to
utilise all cores of my Raspberry with --accel,thread=multi. I know
there is a probably still problem with memory ordering of the host,
but I have also seen some very old commits which could potentially
help with it.
But anyway, with version qemu-i386 version 3.1.0 (Debian 1:3.1+dfsg-7)
I can see OpenRC starting up services and then the kernel crash.
With version QEMU emulator version 3.1.93 (v4.0.0-rc3-dirty)
The whole machine crash with this error:
Illegal instruction
Using command:
./qemu-system-i386 -cdrom alpine.iso --accel tcg,thread=multi
Full Console Output:
qemu-system-i386: warning: Guest expects a stronger memory ordering than the
host provides
This may cause strange/hard to debug errors
Illegal instruction
Kernel:
Linux raspberrypi 4.14.98-v7+ #1200 SMP Tue Feb 12 20:27:48 GMT 2019 armv7l
GNU/Linux
CPU:
ARMv7 Processor rev 5 (v7l)
Features: half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt
vfpd32 lpae evtstrm
4 cores
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- [Qemu-devel] [Bug 1824768] [NEW] Qemu ARMv7 TCG MultiThreading for i386 guest doesn't work, TimeMaster, 2019/04/15
- [Qemu-devel] [Bug 1824768] Re: Qemu ARMv7 TCG MultiThreading for i386 guest doesn't work, Peter Maydell, 2019/04/16
- [Qemu-devel] [Bug 1824768] Re: Qemu ARMv7 TCG MultiThreading for i386 guest doesn't work, TimeMaster, 2019/04/16
- [Qemu-devel] [Bug 1824768] Re: Qemu ARMv7 TCG MultiThreading for i386 guest doesn't work, Peter Maydell, 2019/04/16
- [Qemu-devel] [Bug 1824768] Re: Qemu ARMv7 TCG MultiThreading for i386 guest doesn't work, TimeMaster, 2019/04/16
- [Qemu-devel] [Bug 1824768] Re: Qemu ARMv7 TCG MultiThreading for i386 guest doesn't work, Peter Maydell, 2019/04/16
- [Qemu-devel] [Bug 1824768] Re: Qemu ARMv7 TCG MultiThreading for i386 guest doesn't work, TimeMaster, 2019/04/16
- [Qemu-devel] [Bug 1824768] Re: Qemu ARMv7 TCG MultiThreading for i386 guest doesn't work, Richard Henderson, 2019/04/21
- [Qemu-devel] [Bug 1824768] Re: Qemu ARMv7 TCG MultiThreading for i386 guest doesn't work, Richard Henderson, 2019/04/21
- [Qemu-devel] [Bug 1824768] Re: Qemu ARMv7 TCG MultiThreading for i386 guest doesn't work,
TimeMaster <=