From mboxrd@z Thu Jan 1 00:00:00 1970 From: Laszlo Ersek Subject: Re: [edk2] QueuePFN peculiarity in virtio-mmio Date: Tue, 22 Oct 2013 20:05:43 +0200 Message-ID: <5266BE77.40007@redhat.com> References: <5266BAA1.5080303@redhat.com> <5266BC08.6070008@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <5266BC08.6070008@redhat.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: virtualization-bounces@lists.linux-foundation.org Errors-To: virtualization-bounces@lists.linux-foundation.org To: edk2-devel@lists.sourceforge.net Cc: Jon Masters , "qemu-devel@nongnu.org" , Anthony Liguori , Linux Virtualization List-Id: virtualization@lists.linuxfoundation.org On 10/22/13 19:55, Laszlo Ersek wrote: >> The question arises because Olivier has posted a series to edk2-devel >> that adds virtio-mmio support to TianoCore, and Mark tested it (using >> OVMF) with a Linux guest and found problems. Namely, OVMF itself can >> drive the virtio devices via virtio-mmio, but the Linux kernel booted >> from OVMF can not. The reason is the missing zeroing of QueuePFN when >> OVMF is exiting. (I'm just paraphrasing the analysis.) s/OVMF/AArch64 foundation model/g http://thread.gmane.org/gmane.comp.bios.tianocore.devel/4373/focus=4411 I should have followed my own advice, not to post when sick. I'll go now and hide in a cave. Laszlo /facepalm