On Wed, Aug 28, 2013 at 02:55:26PM +0200, Andreas Färber wrote: > Am 28.08.2013 14:10, schrieb Laszlo Ersek: > > On 08/28/13 13:49, Andreas Färber wrote: > >> 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 > > > > Well that's sorta the same report, considering you and Gary both work > > for SUSE, and the Novell BZ seems to imply the build in question was Gary's: > > > >> qemu 1.6.0 fails to run the tianocore firmware > >> (home:gary_lin:UEFI/OVMF) properly. This worked with previous qemu > > ^^^^^^^^ > >> versions: > > > > :) > > Different reporters, so who knows if the setups are the same. ;) > > >> 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. :) > > > > Hm. LP 1212402 <https://bugs.launchpad.net/qemu/+bug/1212402> probably > > concerns the "similar case with kernel < 3.9" mentioned by Gary, and is > > likely not revelant here. > > > > > > Gary & Ludwig, can you confirm that your OVMF build includes SVN r14494? > > > > Author: Jordan Justen <jordan.l.jus...@intel.com> > > Date: Thu Jul 18 22:51:27 2013 +0000 > > > > OvmfPkg/Sec: Build identity mapped pages in RAM for X64 > > > > This is based on MdeModulePkg/Core/DxeIplPeim/X64/VirtualMemory.c. > > > > Previously we would run using page tables built into the > > firmware device. > > > > If a flash memory is available, it is unsafe for the page > > tables to be stored in memory since the processor may try > > to write to the page table data structures. > > > > Additionally, when KVM ROM support is enabled for the > > firmware device, then PEI fails to boot when the page > > tables are in the firmware device. > > https://build.opensuse.org/package/show/Virtualization/OVMF > is at r14547 and that one works for me. > > Gary/Ludwig, can you confirm that this is resolved? > I still got the black screen even with OVMF r14547 or r14608. I also tried kernel 3.10.9 and 3.11-rc7, but no luck.
Reverting the KVM_MEM_READONLY patch works for me, but the OVMF patch somehow didn't work. Thanks, Gary Lin
