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From: | Beth Kon |
Subject: | Re: [Qemu-devel] [PATCH] Fix non-ACPI Timer Interrupt Routing |
Date: | Mon, 20 Apr 2009 14:06:10 -0400 |
User-agent: | Thunderbird 2.0.0.21 (X11/20090318) |
Sebastian Herbszt wrote:
Do you mean you used a bochs bios that doesn't include #ifdef BX_QEMU portions? Then it wouldn't work because QEMU overrides irq0->inti2 in its ioapic code and without the matching bios that notifies the guest of the override, boots would likely fail. This change was put in because of the needs of the HPET, but now it is standard procedure for QEMU. With or without HPET, QEMU will override irq0->inti2.Beth Kon wrote:This is part of a bigger change for QEMU, incorporating irq0->inti2 override for ACPI, and non-ACPI, driven by addition of the HPET. It required BIOS changes as well as QEMU changes to route irq0 to inti2 of the IOAPIC. This patch alone is not complete. I have tested the complete solution in QEMU, thus the guards.I just tested qemu r7185 with bochs bios (without your patch) and used a Linux
If you mean that you used a QEMU Bochs (with ifdef BX_QEMU included), please let me know what kind of errors you are seeing.
2.6.27.7 guest (openSUSE-11.1-NET-i586.iso). If i don't misunderstand youthis change is only needed with HPET. I have tested the following configurationswhich all fail: hpet enabled, no guest kernel parameters hpet enabled, guest kernel with acpi=off hpet disabled, no guest kernel parameters hpet disabled, guest kernel with acpi=offSince it even fails with HPET disabled, this change can't only be needed for HPET, can it?Ed: Have you tried your Linux guest with HPET enabled or disabled in your original report / patch?- Sebastian
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