kernel/git/stable/linux.git/virt/kvm/eventfd.c, branch linux-4.7.y

kvm: Conditionally register IRQ bypass consumer

2016-05-11T20:37:55+00:00

If we don't support a mechanism for bypassing IRQs, don't register as a consumer. This eliminates meaningless dev_info()s when the connect fails between producer and consumer, such as on AMD systems where kvm_x86_ops->update_pi_irte is not implemented Signed-off-by: Alex Williamson Signed-off-by: Paolo Bonzini

KVM: x86: merge kvm_arch_set_irq with kvm_set_msi_inatomic

2015-11-04T15:24:35+00:00

We do not want to do too much work in atomic context, in particular not walking all the VCPUs of the virtual machine. So we want to distinguish the architecture-specific injection function for irqfd from kvm_set_msi. Since it's still empty, reuse the newly added kvm_arch_set_irq and rename it to kvm_arch_set_irq_inatomic. Reviewed-by: Radim Krčmář Signed-off-by: Paolo Bonzini

kvm/eventfd: add arch-specific set_irq

2015-10-16T08:34:29+00:00

Allow for arch-specific interrupt types to be set. For that, add kvm_arch_set_irq() which takes interrupt type-specific action if it recognizes the interrupt type given, and -EWOULDBLOCK otherwise. The default implementation always returns -EWOULDBLOCK. Signed-off-by: Andrey Smetanin Reviewed-by: Roman Kagan Signed-off-by: Denis V. Lunev CC: Vitaly Kuznetsov CC: "K. Y. Srinivasan" CC: Gleb Natapov CC: Paolo Bonzini Signed-off-by: Paolo Bonzini

kvm/eventfd: factor out kvm_notify_acked_gsi()

2015-10-16T08:34:29+00:00

Factor out kvm_notify_acked_gsi() helper to iterate over EOI listeners and notify those matching the given gsi. It will be reused in the upcoming Hyper-V SynIC implementation. Signed-off-by: Andrey Smetanin Reviewed-by: Roman Kagan Signed-off-by: Denis V. Lunev CC: Vitaly Kuznetsov CC: "K. Y. Srinivasan" CC: Gleb Natapov CC: Paolo Bonzini Signed-off-by: Paolo Bonzini

kvm/eventfd: avoid loop inside irqfd_update()

2015-10-16T08:34:28+00:00

The loop(for) inside irqfd_update() is unnecessary because any other value for irq_entry.type will just trigger schedule_work(&irqfd->inject) in irqfd_wakeup. Signed-off-by: Andrey Smetanin Reviewed-by: Roman Kagan Signed-off-by: Denis V. Lunev CC: Vitaly Kuznetsov CC: "K. Y. Srinivasan" CC: Gleb Natapov CC: Paolo Bonzini Signed-off-by: Paolo Bonzini

KVM: Add an arch specific hooks in 'struct kvm_kernel_irqfd'

2015-10-01T13:06:47+00:00

This patch adds an arch specific hooks 'arch_update' in 'struct kvm_kernel_irqfd'. On Intel side, it is used to update the IRTE when VT-d posted-interrupts is used. Signed-off-by: Feng Wu Reviewed-by: Alex Williamson Signed-off-by: Paolo Bonzini

KVM: eventfd: add irq bypass consumer management

2015-10-01T13:06:46+00:00

This patch adds the registration/unregistration of an irq_bypass_consumer on irqfd assignment/deassignment. Signed-off-by: Eric Auger Signed-off-by: Feng Wu Reviewed-by: Alex Williamson Signed-off-by: Paolo Bonzini

KVM: introduce kvm_arch functions for IRQ bypass

2015-10-01T13:06:45+00:00

This patch introduces - kvm_arch_irq_bypass_add_producer - kvm_arch_irq_bypass_del_producer - kvm_arch_irq_bypass_stop - kvm_arch_irq_bypass_start They make possible to specialize the KVM IRQ bypass consumer in case CONFIG_KVM_HAVE_IRQ_BYPASS is set. Signed-off-by: Eric Auger [Add weak implementations of the callbacks. - Feng] Signed-off-by: Feng Wu Reviewed-by: Alex Williamson Signed-off-by: Paolo Bonzini

KVM: create kvm_irqfd.h

2015-10-01T13:06:44+00:00

Move _irqfd_resampler and _irqfd struct declarations in a new public header: kvm_irqfd.h. They are respectively renamed into kvm_kernel_irqfd_resampler and kvm_kernel_irqfd. Those datatypes will be used by architecture specific code, in the context of IRQ bypass manager integration. Signed-off-by: Eric Auger Signed-off-by: Feng Wu Reviewed-by: Alex Williamson Signed-off-by: Paolo Bonzini

kvm: add capability for any-length ioeventfds

2015-10-01T13:06:31+00:00

Cc: Gleb Natapov Cc: Paolo Bonzini Signed-off-by: Jason Wang Signed-off-by: Paolo Bonzini