On Fri, Oct 4, 2013 at 3:09 PM, Gleb Natapov <gleb@xxxxxxxxxx> wrote:
> On Fri, Oct 04, 2013 at 03:03:17PM +0530, Kashyap Chamarthy wrote:
>> Discussed with Gleb on IRC: I'll have to try with kvm.git
I just compiled kernel from kvm.git queue on both L0 and L1.
For completeness' sake, this how I did:
$ git describe
for-linus-12017-g8a3c1a33
$ git log | head -1
commit 8a3c1a33476f6bfebd07954e2277dbc88003bd37
$ git branch -d test_ept1 origin/queue
$ make -j6 && make bzImage && make modules
$ sudo make modules_install && make install
(Rebooted both L0 and L1 into the new kernel)
> and a simple
>> qemu-kvm command line.
>>
> And try to disable shadow vmcs on the host just to rule it out.
$ cat /sys/module/kvm_intel/parameters/enable_shadow_vmcs
N
The above didn't have any effect.
No, booting L2 is still stuck.
Not sure what's broken (if at all) here. Gleb, you mentioned you were
able to test the MMU combination 'shadow on EPT' just fine with an F19
liveCD without libvirt in-place. If you have still have that test
environment, can you please post your qemu-kvm command line?
Thanks.
>
>> Thanks, Gleb.
>>
>> On Fri, Oct 4, 2013 at 2:01 PM, Kashyap Chamarthy <kashyap.cv@xxxxxxxxx> wrote:
>> > I have EPT enabled on L0, disabled on L1, and when attempted to boot
>> > an L2 guest, it results in cursor just blinking on the serial console.
>> > (All of them are Fedora 19 minimal guests.)
>> >
>> > To be clear, by "disable" I mean, the below KVM parameter is N
>> >
>> > $ cat /sys/module/kvm_intel/parameters/ept
>> > N
>> >
>> > I don't see any boot messages on serial console either. Running
>> >
>> > $ virsh start nguest-01 --console
>> >
>> > results in cursor just waiting there and hung.
>> >
>> > I thought I'll see what's going on in L2 logs by mounting the disk
>> > image read-only via guestfish
>> >
>> > $ guestfish --ro -d nguest-01 -i
>> >
>> > This is hung too.
>> >
>> > NOTE: If I enable EPT in L1, I'm able to boot L2 guests just fine and
>> > can see all the boot messages.
>> >
>> > Any hints on what might be going on here?
>> >
>> > Details about test environment below.
>> >
>> > Setup info:
>> > ----------------
>> >
>> > L0 (Intel Haswell):
>> > - 4 pCPU 16G pMEM.
>> >
>> > - Version (same for both L0 and L1):
>> > $ uname -r; rpm -q qemu-kvm libvirt-daemon-kvm libguestfs
>> > 3.12.0-0.rc3.git1.2.fc21.x86_64
>> > qemu-kvm-1.4.2-7.fc19.x86_64
>> > libvirt-daemon-kvm-1.0.5.5-1.fc19.x86_64
>> > libguestfs-1.22.5-1.fc19.x86_64
>> >
>> > KVM Parameters in L0:
>> >
>> > $ cat /sys/module/kvm_intel/parameters/nested
>> > Y
>> > $ cat /sys/module/kvm_intel/parameters/enable_shadow_vmcs
>> > Y
>> > $ cat /sys/module/kvm_intel/parameters/ept
>> > Y
>> >
>> >
>> > KVM Parameters in L1 (Note - EPT is disabled below):
>> >
>> > $ cat /sys/module/kvm_intel/parameters/nested
>> > Y
>> > $ cat /sys/module/kvm_intel/parameters/enable_shadow_vmcs
>> > N
>> > $ cat /sys/module/kvm_intel/parameters/ept
>> > N
>> >
>> >
>> > L1 qemu-kvm command line:
>> > ----------------------------------------
>> >
>> > $ ps -ef | grep qemu
>> > qemu 4329 1 30 03:35 ? 00:13:47
>> > /usr/bin/qemu-system-x86_64 -machine accel=kvm -name regular-guest -S
>> > -machine pc-i440fx-1.4,accel=kvm,usb=off -cpu host -m 10240 -smp
>> > 4,sockets=4,cores=1,threads=1 -uuid
>> > 4ed9ac0b-7f72-dfcf-68b3-e6fe2ac588b2 -nographic -no-user-config
>> > -nodefaults -chardev
>> > socket,id=charmonitor,path=/var/lib/libvirt/qemu/regular-guest.monitor,server,nowait
>> > -mon chardev=charmonitor,id=monitor,mode=control -rtc base=utc
>> > -no-shutdown -boot c -usb -drive
>> > file=/home/test/vmimages/regular-guest.qcow2,if=none,id=drive-virtio-disk0,format=qcow2,cache=none
>> > -device virtio-blk-pci,bus=pci.0,addr=0x4,drive=drive-virtio-disk0,id=virtio-disk0
>> > -netdev tap,fd=23,id=hostnet0,vhost=on,vhostfd=24 -device
>> > virtio-net-pci,netdev=hostnet0,id=net0,mac=52:54:00:80:c1:34,bus=pci.0,addr=0x3
>> > -chardev pty,id=charserial0 -device
>> > isa-serial,chardev=charserial0,id=serial0 -device usb-tablet,id=input0
>> > -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x5
>> >
>> >
>> > L2 qemu-kvm command line:
>> > ----------------------------------------
>> > $ ps -ef | grep qemu
>> > qemu 1174 1 99 04:13 ? 00:06:12
>> > /usr/bin/qemu-system-x86_64 -machine accel=kvm -name nguest-01 -S
>> > -machine pc-i440fx-1.4,accel=kvm,usb=off -m 2048 -smp
>> > 2,sockets=2,cores=1,threads=1 -uuid
>> > b47c5cbb-b320-ce9d-c595-4e083b0e465d -nographic -no-user-config
>> > -nodefaults -chardev
>> > socket,id=charmonitor,path=/var/lib/libvirt/qemu/nguest-01.monitor,server,nowait
>> > -mon chardev=charmonitor,id=monitor,mode=control -rtc base=utc
>> > -no-shutdown -device piix3-usb-uhci,id=usb,bus=pci.0,addr=0x1.0x2
>> > -drive file=/home/test/vmimages/nguest-01.qcow2,if=none,id=drive-virtio-disk0,format=qcow2,cache=none
>> > -device virtio-blk-pci,scsi=off,bus=pci.0,addr=0x4,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=1
>> > -netdev tap,fd=23,id=hostnet0,vhost=on,vhostfd=24 -device
>> > virtio-net-pci,netdev=hostnet0,id=net0,mac=52:54:00:be:d5:8e,bus=pci.0,addr=0x3
>> > -chardev pty,id=charserial0 -device
>> > isa-serial,chardev=charserial0,id=serial0 -device usb-tablet,id=input0
>> > -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x5
>> >
>> >
>> > /kashyap
>
> --
> Gleb.
--
To unsubscribe from this list: send the line "unsubscribe kvm" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
