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path: root/virt/kvm/irq_comm.c
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2009-03-24KVM: fix sparse warnings: Should it be static?Hannes Eder
Impact: Make symbols static. Fix this sparse warnings: arch/x86/kvm/mmu.c:992:5: warning: symbol 'mmu_pages_add' was not declared. Should it be static? arch/x86/kvm/mmu.c:1124:5: warning: symbol 'mmu_pages_next' was not declared. Should it be static? arch/x86/kvm/mmu.c:1144:6: warning: symbol 'mmu_pages_clear_parents' was not declared. Should it be static? arch/x86/kvm/x86.c:2037:5: warning: symbol 'kvm_read_guest_virt' was not declared. Should it be static? arch/x86/kvm/x86.c:2067:5: warning: symbol 'kvm_write_guest_virt' was not declared. Should it be static? virt/kvm/irq_comm.c:220:5: warning: symbol 'setup_routing_entry' was not declared. Should it be static? Signed-off-by: Hannes Eder <hannes@hanneseder.net> Signed-off-by: Avi Kivity <avi@redhat.com>
2009-03-24KVM: ia64: Fix the build errors due to lack of macros related to MSI.Xiantao Zhang
Include the newly introduced msidef.h to solve the build issues. Signed-off-by: Xiantao Zhang <xiantao.zhang@intel.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2009-03-24KVM: Report IRQ injection status for MSI delivered interruptsGleb Natapov
Return number of CPUs interrupt was successfully injected into or -1 if none. Signed-off-by: Gleb Natapov <gleb@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2009-03-24KVM: Report IRQ injection status to userspace.Gleb Natapov
IRQ injection status is either -1 (if there was no CPU found that should except the interrupt because IRQ was masked or ioapic was misconfigured or ...) or >= 0 in that case the number indicates to how many CPUs interrupt was injected. If the value is 0 it means that the interrupt was coalesced and probably should be reinjected. Signed-off-by: Gleb Natapov <gleb@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2009-03-24KVM: Use irq routing API for MSISheng Yang
Merge MSI userspace interface with IRQ routing table. Notice the API have been changed, and using IRQ routing table would be the only interface kvm-userspace supported. Signed-off-by: Sheng Yang <sheng@linux.intel.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2009-03-24KVM: make irq ack notifications aware of routing tableMarcelo Tosatti
IRQ ack notifications assume an identity mapping between pin->gsi, which might not be the case with, for example, HPET. Translate before acking. Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> Acked-by: Gleb Natapov <gleb@redhat.com>
2009-03-24KVM: Userspace controlled irq routingAvi Kivity
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>
2009-03-24KVM: Interrupt mask notifiers for ioapicAvi Kivity
Allow clients to request notifications when the guest masks or unmasks a particular irq line. This complements irq ack notifications, as the guest will not ack an irq line that is masked. Currently implemented for the ioapic only. Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31KVM: add KVM_USERSPACE_IRQ_SOURCE_ID assertionsMark McLoughlin
Make sure kvm_request_irq_source_id() never returns KVM_USERSPACE_IRQ_SOURCE_ID. Likewise, check that kvm_free_irq_source_id() never accepts KVM_USERSPACE_IRQ_SOURCE_ID. Signed-off-by: Mark McLoughlin <markmc@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31KVM: make kvm_unregister_irq_ack_notifier() safeMark McLoughlin
We never pass a NULL notifier pointer here, but we may well pass a notifier struct which hasn't previously been registered. Guard against this by using hlist_del_init() which will not do anything if the node hasn't been added to the list and, when removing the node, will ensure that a subsequent call to hlist_del_init() will be fine too. Fixes an oops seen when an assigned device is freed before and IRQ is assigned to it. Signed-off-by: Mark McLoughlin <markmc@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31KVM: remove the IRQ ACK notifier assertionsMark McLoughlin
We will obviously never pass a NULL struct kvm_irq_ack_notifier* to this functions. They are always embedded in the assigned device structure, so the assertion add nothing. The irqchip_in_kernel() assertion is very out of place - clearly this little abstraction needs to know nothing about the upper layer details. Signed-off-by: Mark McLoughlin <markmc@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31KVM: IRQ ACK notifier should be used with in-kernel irqchipSheng Yang
Also remove unnecessary parameter of unregister irq ack notifier. Signed-off-by: Sheng Yang <sheng@linux.intel.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2008-10-28KVM: Fix guest shared interrupt with in-kernel irqchipSheng Yang
Every call of kvm_set_irq() should offer an irq_source_id, which is allocated by kvm_request_irq_source_id(). Based on irq_source_id, we identify the irq source and implement logical OR for shared level interrupts. The allocated irq_source_id can be freed by kvm_free_irq_source_id(). Currently, we support at most sizeof(unsigned long) different irq sources. [Amit: - rebase to kvm.git HEAD - move definition of KVM_USERSPACE_IRQ_SOURCE_ID to common file - move kvm_request_irq_source_id to the update_irq ioctl] [Xiantao: - Add kvm/ia64 stuff and make it work for kvm/ia64 guests] Signed-off-by: Sheng Yang <sheng@linux.intel.com> Signed-off-by: Amit Shah <amit.shah@redhat.com> Signed-off-by: Xiantao Zhang <xiantao.zhang@intel.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2008-10-15KVM: Separate irq ack notification out of arch/x86/kvm/irq.cXiantao Zhang
Moving irq ack notification logic as common, and make it shared with ia64 side. Signed-off-by: Xiantao Zhang <xiantao.zhang@intel.com> Signed-off-by: Avi Kivity <avi@qumranet.com>