On 2016/6/22 15:43, Andrew Jones wrote: > On Wed, Jun 22, 2016 at 09:42:29AM +0800, Shannon Zhao wrote: >> > >> > >> > On 2016/6/22 3:53, Peter Maydell wrote: >>> > > On 21 June 2016 at 20:45, Laszlo Ersek <ler...@redhat.com> wrote: >>>>> > >> > On 06/21/16 19:21, Peter Maydell wrote: >>>>>>> > >>> >> and add a note I forgot to mention: my primary hypothesis is >>>>>>> > >>> >> that >>>>>>> > >>> >> the problem here is "guest does not write to the GICD_IGROUPR >>>>>>> > >>> >> and >>>>>>> > >>> >> GICR_IGROUPR registers to program the interrupts it's using as >>>>>>> > >>> >> group 1, but still expects to get IRQs rather than FIQs". >>>>> > >> > >>>>> > >> > ... and it (or whatever else is the root cause) seems to manifest >>>>> > >> > in >>>>> > >> > either the Stall() UEFI boot service, or in UEFI timer events. >>>>> > >> > (This >>>>> > >> > seems to follow from the last debug log entry from Shannon: >>>>> > >> > >>>>> > >> > [Bds]BdsWait(3)..Zzzz... >>>>> > >> > ) >>>>> > >> > >>>>> > >> > ... Just to make it clear: does it reproduce with KVM? Or is that >>>>> > >> > untested perhaps (due to lack of GICv3 hardware e.g.)? >>> > > Upthread Shannon said it worked with KVM enabled. Note that >>> > > KVM's GICv3 emulation is incorrect in that it does not support >>> > > interrupt groups, so all interrupt groups are Group 1 and >>> > > generate IRQ even if the guest doesn't do anything to >>> > > configure them. >> > It does work with KVM enabled. It also works with UEFI and the upstream >> > linux kernel while it doesn't work with UEFI and a FreeBSD guest since >> > the FreeBSD doesn't correctly set the IGROUPR, I think. > Doesn't appear to be FreeBSD specific, as I'm using a Linux kernel and > can reproduce. Besides, it doesn't even make it to grub. > >> > >> > I can't find the commit ID of the UEFI I use but I used the upsream >> > codes of June 15. >> > Andrew, I suggest you use the QEMU mainline which includes the GICv3 >> > emulation and the guest kernel with the commit 7c9b973061. > Yeah, I hadn't noticed that gicv3 made it to mainline. I've switched > to that now. My guest kernel does have 7c9b973061 (I backported it to > the RHELSA kernel)
I just used a new UEFI binary which is built on 8f88f02 and the upstream linux kernel. It boots as well. Could you try the upstream linux kernel? Thanks, -- Shannon