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 <feng...@intel.com>
---
arch/x86/include/asm/kvm_host.h | 2 ++
arch/x86/kvm/x86.c | 5 +++++
include/linux/kvm_host.h | 11 +++++++++++
include/linux/kvm_irqfd.h | 2 ++
virt/kvm/eventfd.c | 12 +++++++++++-
5 files changed, 31 insertions(+), 1 deletion(-)
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index 3038c1b..22269b4 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -176,6 +176,8 @@ enum {
*/
#define KVM_APIC_PV_EOI_PENDING 1
+#define __KVM_HAVE_ARCH_IRQFD_INIT 1
+
struct kvm_kernel_irq_routing_entry;
/*
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index be4b561..ef93fdc 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -8355,6 +8355,11 @@ void kvm_arch_irq_bypass_del_producer(struct
irq_bypass_consumer *cons,
" fails: %d\n", irqfd->consumer.token, ret);
}
+void kvm_arch_irqfd_init(struct kvm_kernel_irqfd *irqfd)
+{
+ irqfd->arch_update = kvm_arch_update_pi_irte;
+}
+
EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_exit);
EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_inj_virq);
EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_page_fault);
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index 5f183fb..f4005dc 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -34,6 +34,8 @@
#include <asm/kvm_host.h>
+struct kvm_kernel_irqfd;
+
/*
* The bit 16 ~ bit 31 of kvm_memory_region::flags are internally used
* in kvm, other bits are visible for userspace which are defined in
@@ -1145,6 +1147,15 @@ extern struct kvm_device_ops kvm_xics_ops;
extern struct kvm_device_ops kvm_arm_vgic_v2_ops;
extern struct kvm_device_ops kvm_arm_vgic_v3_ops;
+#ifdef __KVM_HAVE_ARCH_IRQFD_INIT
+void kvm_arch_irqfd_init(struct kvm_kernel_irqfd *irqfd);
+#else
+static inline void kvm_arch_irqfd_init(struct kvm_kernel_irqfd *irqfd)
+{
+ irqfd->arch_update = NULL;
+}
+#endif
+
#ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu *vcpu, bool val)
diff --git a/include/linux/kvm_irqfd.h b/include/linux/kvm_irqfd.h
index 0c1de05..b7aab52 100644
--- a/include/linux/kvm_irqfd.h
+++ b/include/linux/kvm_irqfd.h
@@ -66,6 +66,8 @@ struct kvm_kernel_irqfd {
struct work_struct shutdown;
struct irq_bypass_consumer consumer;
struct irq_bypass_producer *producer;
+ int (*arch_update)(struct kvm *kvm, unsigned int host_irq,
+ uint32_t guest_irq, bool set);
};
#endif /* __LINUX_KVM_IRQFD_H */
diff --git a/virt/kvm/eventfd.c b/virt/kvm/eventfd.c
index f3050b9..b2d9066 100644
--- a/virt/kvm/eventfd.c
+++ b/virt/kvm/eventfd.c
@@ -288,6 +288,7 @@ kvm_irqfd_assign(struct kvm *kvm, struct kvm_irqfd *args)
INIT_LIST_HEAD(&irqfd->list);
INIT_WORK(&irqfd->inject, irqfd_inject);
INIT_WORK(&irqfd->shutdown, irqfd_shutdown);
+ kvm_arch_irqfd_init(irqfd);
seqcount_init(&irqfd->irq_entry_sc);
f = fdget(args->fd);
@@ -580,13 +581,22 @@ kvm_irqfd_release(struct kvm *kvm)
*/
void kvm_irq_routing_update(struct kvm *kvm)
{
+ int ret;
struct kvm_kernel_irqfd *irqfd;
spin_lock_irq(&kvm->irqfds.lock);
- list_for_each_entry(irqfd, &kvm->irqfds.items, list)
+ list_for_each_entry(irqfd, &kvm->irqfds.items, list) {
irqfd_update(kvm, irqfd);
+ if (irqfd->arch_update && irqfd->producer) {
+ ret = irqfd->arch_update(
+ irqfd->kvm, irqfd->producer->irq,
+ irqfd->gsi, 1);
+ WARN_ON(ret);
+ }
+ }
+
spin_unlock_irq(&kvm->irqfds.lock);
}
--
2.1.0
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