BMC/Intel-BMC/linux.git/virt/kvm/eventfd.c, branch dev

KVM: move iodev.h from virt/kvm/ to include/kvm

2015-03-26T21:43:12+00:00

iodev.h contains definitions for the kvm_io_bus framework. This is needed both by the generic KVM code in virt/kvm as well as by architecture specific code under arch/. Putting the header file in virt/kvm and using local includes in the architecture part seems at least dodgy to me, so let's move the file into include/kvm, so that a more natural "#include " can be used by all of the code. This also solves a problem later when using struct kvm_io_device in arm_vgic.h. Fixing up the FSF address in the GPL header and a wrong include path on the way. Signed-off-by: Andre Przywara Acked-by: Christoffer Dall Reviewed-by: Marc Zyngier Reviewed-by: Marcelo Tosatti Signed-off-by: Marc Zyngier

KVM: Redesign kvm_io_bus_ API to pass VCPU structure to the callbacks.

2015-03-26T21:43:11+00:00

This is needed in e.g. ARM vGIC emulation, where the MMIO handling depends on the VCPU that does the access. Signed-off-by: Nikolay Nikolaev Signed-off-by: Andre Przywara Acked-by: Paolo Bonzini Acked-by: Christoffer Dall Reviewed-by: Marc Zyngier Signed-off-by: Marc Zyngier

KVM: introduce kvm_arch_intc_initialized and use it in irqfd

2015-03-12T14:15:32+00:00

Introduce __KVM_HAVE_ARCH_INTC_INITIALIZED define and associated kvm_arch_intc_initialized function. This latter allows to test whether the virtual interrupt controller is initialized and ready to accept virtual IRQ injection. On some architectures, the virtual interrupt controller is dynamically instantiated, justifying that kind of check. The new function can now be used by irqfd to check whether the virtual interrupt controller is ready on KVM_IRQFD request. If not, KVM_IRQFD returns -EAGAIN. Signed-off-by: Eric Auger Acked-by: Christoffer Dall Reviewed-by: Andre Przywara Acked-by: Marc Zyngier Signed-off-by: Christoffer Dall

kvm: x86: move ioapic.c and irq_comm.c back to arch/x86/

2014-11-21T17:02:37+00:00

ia64 does not need them anymore. Ack notifiers become x86-specific too. Suggested-by: Gleb Natapov Reviewed-by: Radim Krcmar Signed-off-by: Paolo Bonzini

KVM: EVENTFD: Remove inclusion of irq.h

2014-09-24T10:06:25+00:00

Commit c77dcac (KVM: Move more code under CONFIG_HAVE_KVM_IRQFD) added functionality that depends on definitions in ioapic.h when __KVM_HAVE_IOAPIC is defined. At the same time, kvm-arm commit 0ba0951 (KVM: EVENTFD: remove inclusion of irq.h) removed the inclusion of irq.h, an architecture-specific header that is not present on ARM but which happened to include ioapic.h on x86. Include ioapic.h directly in eventfd.c if __KVM_HAVE_IOAPIC is defined. This fixes x86 and lets ARM use eventfd.c. Signed-off-by: Christoffer Dall Signed-off-by: Paolo Bonzini

KVM: Move more code under CONFIG_HAVE_KVM_IRQFD

2014-08-06T12:24:47+00:00

Commits e4d57e1ee1ab (KVM: Move irq notifier implementation into eventfd.c, 2014-06-30) included the irq notifier code unconditionally in eventfd.c, while it was under CONFIG_HAVE_KVM_IRQCHIP before. Similarly, commit 297e21053a52 (KVM: Give IRQFD its own separate enabling Kconfig option, 2014-06-30) moved code from CONFIG_HAVE_IRQ_ROUTING to CONFIG_HAVE_KVM_IRQFD but forgot to move the pieces that used to be under CONFIG_HAVE_KVM_IRQCHIP. Together, this broke compilation without CONFIG_KVM_XICS. Fix by adding or changing the #ifdefs so that they point at CONFIG_HAVE_KVM_IRQFD. Signed-off-by: Paolo Bonzini

KVM: Give IRQFD its own separate enabling Kconfig option

2014-08-05T12:26:28+00:00

Currently, the IRQFD code is conditional on CONFIG_HAVE_KVM_IRQ_ROUTING. So that we can have the IRQFD code compiled in without having the IRQ routing code, this creates a new CONFIG_HAVE_KVM_IRQFD, makes the IRQFD code conditional on it instead of CONFIG_HAVE_KVM_IRQ_ROUTING, and makes all the platforms that currently select HAVE_KVM_IRQ_ROUTING also select HAVE_KVM_IRQFD. Signed-off-by: Paul Mackerras Tested-by: Eric Auger Tested-by: Cornelia Huck Signed-off-by: Paolo Bonzini

KVM: Move irq notifier implementation into eventfd.c

2014-08-05T12:26:24+00:00

This moves the functions kvm_irq_has_notifier(), kvm_notify_acked_irq(), kvm_register_irq_ack_notifier() and kvm_unregister_irq_ack_notifier() from irqchip.c to eventfd.c. The reason for doing this is that those functions are used in connection with IRQFDs, which are implemented in eventfd.c. In future we will want to use IRQFDs on platforms that don't implement the GSI routing implemented in irqchip.c, so we won't be compiling in irqchip.c, but we still need the irq notifiers. The implementation is unchanged. Signed-off-by: Paul Mackerras Tested-by: Eric Auger Tested-by: Cornelia Huck Signed-off-by: Paolo Bonzini

KVM: Move all accesses to kvm::irq_routing into irqchip.c

2014-08-05T12:26:20+00:00

Now that struct _irqfd does not keep a reference to storage pointed to by the irq_routing field of struct kvm, we can move the statement that updates it out from under the irqfds.lock and put it in kvm_set_irq_routing() instead. That means we then have to take a srcu_read_lock on kvm->irq_srcu around the irqfd_update call in kvm_irqfd_assign(), since holding the kvm->irqfds.lock no longer ensures that that the routing can't change. Combined with changing kvm_irq_map_gsi() and kvm_irq_map_chip_pin() to take a struct kvm * argument instead of the pointer to the routing table, this allows us to to move all references to kvm->irq_routing into irqchip.c. That in turn allows us to move the definition of the kvm_irq_routing_table struct into irqchip.c as well. Signed-off-by: Paul Mackerras Tested-by: Eric Auger Tested-by: Cornelia Huck Signed-off-by: Paolo Bonzini

KVM: irqchip: Provide and use accessors for irq routing table

2014-08-05T12:26:16+00:00

This provides accessor functions for the KVM interrupt mappings, in order to reduce the amount of code that accesses the fields of the kvm_irq_routing_table struct, and restrict that code to one file, virt/kvm/irqchip.c. The new functions are kvm_irq_map_gsi(), which maps from a global interrupt number to a set of IRQ routing entries, and kvm_irq_map_chip_pin, which maps from IRQ chip and pin numbers to a global interrupt number. This also moves the update of kvm_irq_routing_table::chip[][] into irqchip.c, out of the various kvm_set_routing_entry implementations. That means that none of the kvm_set_routing_entry implementations need the kvm_irq_routing_table argument anymore, so this removes it. This does not change any locking or data lifetime rules. Signed-off-by: Paul Mackerras Tested-by: Eric Auger Tested-by: Cornelia Huck Signed-off-by: Paolo Bonzini