On 03/16/16 14:47, Ni, Ruiyu wrote: > Laszlo, > Which kernel version are you using? Yes I indeed used 4.4.1 from ppa wily. > I would more likely to assume 4.4.1 has a regression. Will try 4.4 tomorrow.
I am using a RHEL-7 kernel that is not publicly released yet. While I was working on SMM for OVMF, I built upstream kernels manually. It is not justified to suspect a 4.4.1 regression until you test a hand-built upstream 4.4.1 kernel (or, even better, the latest in the 4.4.y stable series, 4.4.5 at this moment). What a PPA offers has zero relevance. Please build your kernel manually from the upstream sources, or use an official (and fully updated) distribution release that is built on the 4.4 kernel. (The difference between my using an unreleased, development RHEL-7 kernel and your using some random Ubuntu PPA is that my RHEL-7 kernel was built by the upstream KVM maintainer: Paolo, as part of his work at Red Hat. He knows what he's doing. The official distro releases also tend to. I wouldn't be so sure about a random *personal* packaging archive (PPA) though. It is *possible* that upstream 4.4.1 indeed contains a regression, but when using a PPA, your first suspect should be the PPA.) Thanks Laszlo > Thanks a lot for your long mail. > > Thanks, > Ray > >> 在 2016年3月16日，下午8:38，Laszlo Ersek <ler...@redhat.com> 写道： >> >>> On 03/16/16 01:55, Ni, Ruiyu wrote: >>> >>> >>> Regards, >>> Ray >>> >>> >>>> -----Original Message----- >>>> From: Paolo Bonzini [mailto:pbonz...@redhat.com] >>>> Sent: Wednesday, March 16, 2016 12:06 AM >>>> To: Ni, Ruiyu <ruiyu...@intel.com> >>>> Cc: Laszlo Ersek <ler...@redhat.com>; Justen, Jordan L >>>> <jordan.l.jus...@intel.com>; edk2-devel@lists.01.org >>>> <edk2-de...@ml01.01.org> >>>> Subject: Re: [edk2] Software SMI STS bit is not set when writing port B2 >>>> in QEMU Q35 >>>> >>>> >>>> >>>>> On 15/03/2016 16:48, Ni, Ruiyu wrote: >>>>> I don't think CSM matters and the bin I am using cannot be >>>>> distributed. Does the qemu build steps matters? I ran configure >>>>> --target-list=x86_64-softmmu. I traced the code and found the code >>>>> hung when SMM is relocating. The code was waiting for mRebased flag >>>>> be set. >>>> >>>> First of all, can you reproduce the problem without CSM? >>> >>> Yes. I also attached the OVMF_CODE.fd and OVMF_VARS.fd >>> (in OVMF.zip). >>> Can you help to try whether it can boot to shell in your qemu? >>> I can confirm when accel=tcg the OVMF can boot well. >>> But when accel=kvm it cannot. >>> SMM emulation over KVM has certain requirements for >>> HOST PC which I am not aware of? >> >> Your binary works for me (it boots to the UEFI shell) on KVM. >> >> As far as I understand, for the host kernel (= KVM), the requirement is >> Linux 4.4 or later. >> >> I'm not using an upstream host kernel; at the moment I'm using one of >> Paolo's RHEL-7 backport kernels. So, my testing didn't repeat that part >> of your setup. >> >> I can see from your earlier email that you upgraded your host kernel to >> 4.4.1 and you rebooted your PC with it. Is this an upstream kernel that >> you built, or is it packaged by Ubuntu? >> >> As far as I can see, the latest release for Ubuntu 14.04 is 14.04.4. By >> default it comes with a 4.2 based kernel: >> >> https://wiki.ubuntu.com/TrustyTahr/ReleaseNotes#Updated_Packages >> >> I think something is wrong with your host kernel. Based on the >> information available, I cannot decide if it is actually a Ubuntu kernel >> that is simply too old, or an upstream 4.4.1 stable kernel release that >> you built yourself, and maybe 4.4.1 regressed relative to 4.4.0. >> >> If you built the host kernel manually, why did you pick 4.4.1 exactly? >> As far as I can see, 4.4.5 is also available from stable git: >> >> http://git.kernel.org/cgit/linux/kernel/git/stable/linux-stable.git/commit/?h=linux-4.4.y&id=62e21959dc6f25c5fce0c1a0934e4a9d982bf99b >> >> Hmm, I googled "Ubuntu" and "4.4.1" together, and the only relevant hits >> I seem to be getting are from: >> >> http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.4.1-wily/ >> >> I wouldn't recommend using those -- PPA means "Personal Package >> Archives", plus the "wily" suffix implies the 15.10 release of Ubuntu, >> not 14.04. >> >> If you insist on using Ubuntu, please at least try 16.04 LTS ("Xenial >> Xerus"), which is apparently based on 4.4 *officially*. >> >> Thanks >> Laszlo _______________________________________________ edk2-devel mailing list edk2-devel@lists.01.org https://lists.01.org/mailman/listinfo/edk2-devel
