Am 28.08.2013 13:45, schrieb Laszlo Ersek: > (qemu-devel CC'd) > > On 08/28/13 12:35, Gary Ching-Pang Lin wrote: >> Hi, >> >> I recently updated qemu to 1.6.0 and found OVMF just showed a blank >> screen when kvm was enabled. I tried to dump OVMF log with the >> following commond but nothing was stored in debug.log. >> >> qemu-system-x86_64 -s -enable-kvm -bios OVMF.fd -debugcon file:debug.log >> -global isa-debugcon.iobase=0x402 >> >> The kvm trace was recorded with "trace-cmd record -b 20000 -e kvm" >> and uploaded to the following link: >> https://docs.google.com/file/d/0B9hbtlc_aK_gcGh2TDZLUVlzWWc/edit?usp=sharing >> >> I found a similar case with kernel < 3.9, but I already upgraded linux >> kernel to 3.10.5, so this may be another bug. > > Well, the usual first response in cases like this is... > > Can you bisect qemu? :)
We had a similar report: https://bugzilla.novell.com/show_bug.cgi?id=835895 git-bisect said: 235e8982ad393e5611cb892df54881c872eea9e1 is the first bad commit commit 235e8982ad393e5611cb892df54881c872eea9e1 Author: Jordan Justen <jordan.l.jus...@intel.com> Date: Wed May 29 01:27:26 2013 -0700 kvm: support using KVM_MEM_READONLY flag for regions For readonly memory regions and rom devices in romd_mode, we make use of the KVM_MEM_READONLY. A slot that uses KVM_MEM_READONLY can be read from and code can execute from the region, but writes will exit to qemu. For rom devices with !romd_mode, we force the slot to be removed so reads or writes to the region will exit to qemu. (Note that a memory region in this state is not executable within kvm.) v7: * Update for readable => romd_mode rename (5f9a5ea1) Signed-off-by: Jordan Justen <jordan.l.jus...@intel.com> Reviewed-by: Xiao Guangrong <xiaoguangr...@linux.vnet.ibm.com> (v4) Reviewed-by: Paolo Bonzini <pbonz...@redhat.com> (v5) Message-id: 1369816047-16384-4-git-send-email-jordan.l.jus...@intel.com Signed-off-by: Anthony Liguori <aligu...@us.ibm.com> Any hints or patches welcome. :) Regards, Andreas -- SUSE LINUX Products GmbH, Maxfeldstr. 5, 90409 Nürnberg, Germany GF: Jeff Hawn, Jennifer Guild, Felix Imendörffer; HRB 16746 AG Nürnberg
