Beth Kon wrote:
These patches resolve the irq0->inti2 override issue, and get the hpet working
on kvm.
They are dependent on Jes Sorensen's recent 0006-qemu-kvm-irq-routing.patch.
Override and HPET changes are sent as a series because HPET depends on the
override. Win2k8 expects the HPET interrupt on inti2, regardless of whether
an override exists in the BIOS. And the HPET spec states that in legacy mode,
timer interrupt is on inti2.
The irq0->inti2 override will always be used unless the kernel cannot do irq
routing (i.e., compatibility with old kernels). So if the kernel is capable,
userspace sets up irq0->inti2 via the irq routing interface, and adds the
irq0->inti2 override to the MADT interrupt source override table,
and the mp table (for the no-acpi case).
A couple of months ago, Marcelo was seeing RHEL5 guests complain of invalid
checksum with these patches, but later he couldn't reproduce it, and I'm not
seeing it now. While all guests still need to be fully tested, everything
appears to be in order. I've tested on win2k864, win2k832, RHEL5.3 32 bit,
and ubuntu 8.10 64 bit.
What are the changes relative to v1?
@@ -477,6 +480,7 @@ void wrmsr_smp(uint32_t index, uint64_t val)
#define QEMU_CFG_SIGNATURE 0x00
#define QEMU_CFG_ID 0x01
#define QEMU_CFG_UUID 0x02
+#define QEMU_CFG_IRQ0_OVERRIDE 0x0e
As noted, this should be in the arch local space.
--
error compiling committee.c: too many arguments to function
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