Gleb Natapov wrote on 2012-12-03:
> On Mon, Dec 03, 2012 at 03:01:01PM +0800, Yang Zhang wrote:
>> When PIT connects to IOAPIC, it route to pin 2 not pin 0.
>>
> This hack didn't work for a long time and nobody complained. It
> should be safe to get rid of it.
This hack is used to work around an issue about RHEL4. Not sure whether anyone still uses RHEL4.
>> Signed-off-by: Yang Zhang <yang.z.zhang@xxxxxxxxx>
>> ---
>> virt/kvm/ioapic.c | 2 +-
>> 1 files changed, 1 insertions(+), 1 deletions(-)
>> diff --git a/virt/kvm/ioapic.c b/virt/kvm/ioapic.c index
>> cfb7e4d..166c450 100644 --- a/virt/kvm/ioapic.c +++ b/virt/kvm/ioapic.c
>> @@ -181,7 +181,7 @@ static int ioapic_deliver(struct kvm_ioapic
>> *ioapic, int irq)
>>
>> #ifdef CONFIG_X86
>> /* Always delivery PIT interrupt to vcpu 0 */
>> - if (irq == 0) {
>> + if (irq == 2) {
>> irqe.dest_mode = 0; /* Physical mode. */
>> /* need to read apic_id from apic regiest since
>> * it can be rewritten */
>> --
>> 1.7.1
>
> --
> Gleb.
Best regards,
Yang
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