On 11/26/13 09:46, Laszlo Ersek wrote: > On 11/26/13 07:44, Gary Ching-Pang Lin wrote: >> On Tue, Nov 26, 2013 at 06:21:21AM +0100, Laszlo Ersek wrote: >>> Hi, >>> >>> as soon as Timer.efi is installed and the first timer interrupt is >>> delivered, OVMF hangs with the VCPU spinning at 100%. >>> >>> I can see that SVN r14887 is the commit that directly switches the >>> libraries that OvmfPkg uses. >>> >>> However, at that point "MdeModulePkg/Library/CpuExceptionHandlerLibNull" >>> (or other OvmfPkg dependencies) are already broken. Because if I revert >>> just r14887, then the busy loop related to the timer interrupt is >>> replaced by a reboot, at the same spot -- after Timer.efi is loaded and >>> the first interrupt is delivered. Different symptom (infinite reboot >>> loop), unusable just the same. >>> >>> I have to revert r14885 too, to get it working again. >>> >> I am using r14890 and no system hang happened. >> My system: openSUSE 12.3 + kernel 3.12.0, qemu 1.6.0 >> CPU: Intel Core2 Duo P8600 > > Can you please try a few different guest RAM sizes? > > For me it works with 2056 MB, but if I go just 1 MB higher (to 2057 MB), > then I witness the hang after Timer.efi is loaded.
I traced into the hang (under KVM) with trace-cmd, and I'm seeing a long series of qemu-system-x86-20449 [002] 73561.567277: kvm_entry: vcpu 0 qemu-system-x86-20449 [002] 73561.568271: kvm_exit: reason EXTERNAL_INTERRUPT rip 0x8001e17f info 0 800000ef qemu-system-x86-20449 [002] 73561.568277: kvm_entry: vcpu 0 qemu-system-x86-20449 [002] 73561.569271: kvm_exit: reason EXTERNAL_INTERRUPT rip 0x8001e178 info 0 800000ef The rip alternates between 0x8001e17f and 0x8001e178. Laszlo ------------------------------------------------------------------------------ Shape the Mobile Experience: Free Subscription Software experts and developers: Be at the forefront of tech innovation. Intel(R) Software Adrenaline delivers strategic insight and game-changing conversations that shape the rapidly evolving mobile landscape. Sign up now. http://pubads.g.doubleclick.net/gampad/clk?id=63431311&iu=/4140/ostg.clktrk _______________________________________________ edk2-devel mailing list edk2-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/edk2-devel
