Am 23.03.2018 um 11:03 schrieb qemu-discuss-requ...@nongnu.org:
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Today's Topics:
1. qemu-kvm and qemu-system-x86_64 (Deneau, Tom)
2. Re: qemu-kvm and qemu-system-x86_64 (Jakob Bohm)
3. Re: How do -icount flags work in QEMU TCG (Arnabjyoti Kalita)
4. Antw: qemu-kvm and qemu-system-x86_64 (Steffen Wei?gerber)
5. Re: How do -icount flags work in QEMU TCG (Peter Maydell)
----------------------------------------------------------------------
Message: 1
Date: Thu, 22 Mar 2018 17:29:15 +0000
From: "Deneau, Tom" <tom.den...@amd.com>
To: "qemu-discuss@nongnu.org" <qemu-discuss@nongnu.org>
Subject: [Qemu-discuss] qemu-kvm and qemu-system-x86_64
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<sn1pr12mb2414fb09c79921ec716689c59b...@sn1pr12mb2414.namprd12.prod.outlook.com>
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My situation: I want to run a KVM-accelerated qemu but I want to build
everything involved from the latest sources and use those instead of any
downloadable distro packages. (This is on SLES12-SP3 although I don't think
the distro matters).
I am able to build and install from
* http://github.com/qemu/qemu using ../configure
--target-list=x86_64-softmmu --enable-kvm --prefix=/usr --sysconfdir=/etc
* http://github.com/libvirt/libvirt using ./configure --prefix=/usr
--sysconfdir=/etc --localstatedir=/var
Before running make install, I also removed the existing distro packages like
libvirt, libvirt-client, qemu-kvm, etc.
My question: In the installed distro packages there was an executable,
/usr/libexec/qemu-kvm
But after building and installing qemu from sources as above, I did not see any
new qemu-kvm.
Is there some other repository I need to build from to get qemu-kvm?
I ask because I am starting vms using virsh define xyz.xml; virsh start xyz.
And in the original .xml files I had the following under devices:
<emulator>/usr/libexec/qemu-kvm</emulator>
Can I replace that with
<emulator>/usr/local/bin/qemu-system-x86_64</emulator>
Yes, you can do it.
And given that I am already using
<os>
<type>hvm</type>
<boot dev="hd"></boot>
</os>
Will I get the same KVM acceleration as I was previously getting by using
qemu-kvm?
qemu-kvm is hashed (/usr/bin/qemu-kvm)
more /usr/bin/qemu-kvm
#!/bin/sh
exec /usr/bin/qemu-system-x86_64 -machine accel=kvm "$@"
-- Tom Deneau
------------------------------
Message: 2
Date: Thu, 22 Mar 2018 21:39:02 +0100
From: Jakob Bohm <jb-gnumli...@wisemo.com>
To: qemu-discuss@nongnu.org
Subject: Re: [Qemu-discuss] qemu-kvm and qemu-system-x86_64
Message-ID: <5b8c94c2-06a9-3d49-b913-75fe7b46c...@wisemo.com>
Content-Type: text/plain; charset=utf-8; format=flowed
On 22/03/2018 18:29, Deneau, Tom wrote:
My situation: I want to run a KVM-accelerated qemu but I want to build
everything involved from the latest sources and use those instead of any
downloadable distro packages. (This is on SLES12-SP3 although I don't think
the distro matters).
I am able to build and install from
* http://github.com/qemu/qemu using ../configure
--target-list=x86_64-softmmu --enable-kvm --prefix=/usr --sysconfdir=/etc
* http://github.com/libvirt/libvirt using ./configure --prefix=/usr
--sysconfdir=/etc --localstatedir=/var
Before running make install, I also removed the existing distro packages like
libvirt, libvirt-client, qemu-kvm, etc.
My question: In the installed distro packages there was an executable,
/usr/libexec/qemu-kvm
But after building and installing qemu from sources as above, I did not see any
new qemu-kvm.
Is there some other repository I need to build from to get qemu-kvm?
I ask because I am starting vms using virsh define xyz.xml; virsh start xyz.
And in the original .xml files I had the following under devices:
<emulator>/usr/libexec/qemu-kvm</emulator>
Can I replace that with
<emulator>/usr/local/bin/qemu-system-x86_64</emulator>
And given that I am already using
<os>
<type>hvm</type>
<boot dev="hd"></boot>
</os>
Will I get the same KVM acceleration as I was previously getting by using
qemu-kvm?
-- Tom Deneau
For many years now, qemu-kvm has been a small shell script that prefixes
"--enable-kvm" to the other arguments.
Something like (guessing since its no longer on my system):
#!/bin/sh
exec qemu-system-x86_64 --enable-kvm "$@"
It was only a real program before kvm support was merged into standard
qemu.
Enjoy
Jakob
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