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author | Avi Kivity <avi@redhat.com> | 2008-11-19 13:58:46 +0200 |
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committer | Avi Kivity <avi@redhat.com> | 2009-03-24 11:03:06 +0200 |
commit | 399ec807ddc38ecccf8c06dbde04531cbdc63e11 (patch) | |
tree | 75a4e3ee9cfffb4ecf7b4608bb592c89f2b62219 /arch/x86 | |
parent | 193554750441d91e127dd5066b8aebe0f769101c (diff) | |
download | linux-stable-399ec807ddc38ecccf8c06dbde04531cbdc63e11.tar.gz linux-stable-399ec807ddc38ecccf8c06dbde04531cbdc63e11.tar.bz2 linux-stable-399ec807ddc38ecccf8c06dbde04531cbdc63e11.zip |
KVM: Userspace controlled irq routing
Currently KVM has a static routing from GSI numbers to interrupts (namely,
0-15 are mapped 1:1 to both PIC and IOAPIC, and 16:23 are mapped 1:1 to
the IOAPIC). This is insufficient for several reasons:
- HPET requires non 1:1 mapping for the timer interrupt
- MSIs need a new method to assign interrupt numbers and dispatch them
- ACPI APIC mode needs to be able to reassign the PCI LINK interrupts to the
ioapics
This patch implements an interrupt routing table (as a linked list, but this
can be easily changed) and a userspace interface to replace the table. The
routing table is initialized according to the current hardwired mapping.
Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'arch/x86')
-rw-r--r-- | arch/x86/kvm/x86.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 141a0166e51c..32e3a7ec6ad2 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -1835,6 +1835,12 @@ long kvm_arch_vm_ioctl(struct file *filp, } } else goto out; + r = kvm_setup_default_irq_routing(kvm); + if (r) { + kfree(kvm->arch.vpic); + kfree(kvm->arch.vioapic); + goto out; + } break; case KVM_CREATE_PIT: mutex_lock(&kvm->lock); |