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[Bug 1872644] Re: MacOS host qemu-system-x86_64 -cpu host not working
From: |
Sitsofe Wheeler |
Subject: |
[Bug 1872644] Re: MacOS host qemu-system-x86_64 -cpu host not working |
Date: |
Wed, 20 Jan 2021 08:39:03 -0000 |
I found that things were unstable unless the following were also added
-cpu Nehalem,-rdtscp
(the CPU can be higher than Nehalem but obviously your host CPU actually has to
be equal or greater too)
-rdtscp is a known issue that has since been workedaround (see bug
#1894836 ).
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https://bugs.launchpad.net/bugs/1872644
Title:
MacOS host qemu-system-x86_64 -cpu host not working
Status in QEMU:
New
Bug description:
MacOS: 10.15.4
uname -a: Linux door 4.15.0-96-generic #97-Ubuntu SMP Wed Apr 1 03:25:46 UTC
2020 x86_64 x86_64 x86_64 GNU/Linux
I am using qemu on mac host, with ubuntu client.
I used to have "-cpu host" in my qemu command as follow:-
qemu-system-x86_64 \
-no-user-config \
-nodefaults \
-name u64d01 \
-show-cursor \
-M q35,accel=hvf,usb=off,vmport=off \
-cpu host \
-m 8192M \
-smp 4 \
-rtc base=utc,clock=host \
-device virtio-blk-pci,drive=ssd1 \
-drive id=ssd1,file=/Users/js/code/vm/qemu/u64d01.qcow2,if=none,format=qcow2 \
-device virtio-net-pci,netdev=nic1,mac=52:54:98:76:54:33 \
-netdev user,id=nic1,ipv4=on,ipv6=on,hostname=u64d01,hostfwd=tcp::2222-:22 \
-device virtio-tablet-pci \
-device virtio-vga \
-device ich9-intel-hda,id=snd,msi=on \
-device hda-output,id=snd-codec0,bus=snd.0,cad=0,audiodev=snd0 \
-audiodev coreaudio,id=snd0
Base on log of one of the vm, it was definitely working on
2020-01-17(base on journal inside vm), with qemu 4.2.0, which I
installed with brew.
The only way to make it work is to remove "-cpu host".
Already tried with 4.1.1, 4.2 and 5.0rc2. Same result.
To reproduce, try above with a Ubuntu 18.04 installation cd. Client
will crash during kernel loading.
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