xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

KVM: irq ack notification

Browse Source 
Based on a patch from: Ben-Ami Yassour <benami@il.ibm.com>
which was based on a patch from: Amit Shah <amit.shah@qumranet.com>

Notify IRQ acking on PIC/APIC emulation. The previous patch missed two things:

- Edge triggered interrupts on IOAPIC
- PIC reset with IRR/ISR set should be equivalent to ack (LAPIC probably
needs something similar).

Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
CC: Amit Shah <amit.shah@qumranet.com>
CC: Ben-Ami Yassour <benami@il.ibm.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
This commit is contained in:
Marcelo Tosatti
2008-07-26 17:01:00 -03:00
committed by Avi Kivity
parent 564f15378f
commit f52447261b
6 changed files with 34 additions and 13 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
arch/x86/kvm/lapic.c
View File

@@ -439,7 +439,7 @@ struct kvm_vcpu *kvm_get_lowest_prio_vcpu(struct kvm *kvm, u8 vector,
static void apic_set_eoi(struct kvm_lapic *apic)
{
int vector = apic_find_highest_isr(apic);
int trigger_mode;
/*
* Not every write EOI will has corresponding ISR,
* one example is when Kernel check timer on setup_IO_APIC
@@ -451,7 +451,10 @@ static void apic_set_eoi(struct kvm_lapic *apic)
apic_update_ppr(apic);
if (apic_test_and_clear_vector(vector, apic->regs + APIC_TMR))
kvm_ioapic_update_eoi(apic->vcpu->kvm, vector);
trigger_mode = IOAPIC_LEVEL_TRIG;
else
trigger_mode = IOAPIC_EDGE_TRIG;
kvm_ioapic_update_eoi(apic->vcpu->kvm, vector, trigger_mode);
}
static void apic_send_ipi(struct kvm_lapic *apic)