diff options
| author | Nikolay Nikolaev <n.nikolaev@virtualopensystems.com> | 2014-05-27 15:03:35 +0300 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2014-06-19 16:41:54 +0300 |
| commit | 69e03ae64ba01c4846425fb13e494bce3eedfa6b (patch) | |
| tree | 46132c9d7295857aee9ca9b49b99ee0d4042599c | |
| parent | f57fcf706342f8545d77a538c4319b752511f672 (diff) | |
Add kvm_eventfds_enabled function
Add a function to check if the eventfd capability is present in KVM in
the host kernel.
Signed-off-by: Antonios Motakis <a.motakis@virtualopensystems.com>
Signed-off-by: Nikolay Nikolaev <n.nikolaev@virtualopensystems.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
| -rw-r--r-- | include/sysemu/kvm.h | 11 | ||||
| -rw-r--r-- | kvm-all.c | 4 | ||||
| -rw-r--r-- | kvm-stub.c | 1 |
3 files changed, 16 insertions, 0 deletions
diff --git a/include/sysemu/kvm.h b/include/sysemu/kvm.h index e79e92c50e..c4556ad59e 100644 --- a/include/sysemu/kvm.h +++ b/include/sysemu/kvm.h @@ -43,6 +43,7 @@ extern bool kvm_allowed; extern bool kvm_kernel_irqchip; extern bool kvm_async_interrupts_allowed; extern bool kvm_halt_in_kernel_allowed; +extern bool kvm_eventfds_allowed; extern bool kvm_irqfds_allowed; extern bool kvm_msi_via_irqfd_allowed; extern bool kvm_gsi_routing_allowed; @@ -83,6 +84,15 @@ extern bool kvm_readonly_mem_allowed; #define kvm_halt_in_kernel() (kvm_halt_in_kernel_allowed) /** + * kvm_eventfds_enabled: + * + * Returns: true if we can use eventfds to receive notifications + * from a KVM CPU (ie the kernel supports eventds and we are running + * with a configuration where it is meaningful to use them). + */ +#define kvm_eventfds_enabled() (kvm_eventfds_allowed) + +/** * kvm_irqfds_enabled: * * Returns: true if we can use irqfds to inject interrupts into @@ -128,6 +138,7 @@ extern bool kvm_readonly_mem_allowed; #define kvm_irqchip_in_kernel() (false) #define kvm_async_interrupts_enabled() (false) #define kvm_halt_in_kernel() (false) +#define kvm_eventfds_enabled() (false) #define kvm_irqfds_enabled() (false) #define kvm_msi_via_irqfd_enabled() (false) #define kvm_gsi_routing_allowed() (false) @@ -113,6 +113,7 @@ KVMState *kvm_state; bool kvm_kernel_irqchip; bool kvm_async_interrupts_allowed; bool kvm_halt_in_kernel_allowed; +bool kvm_eventfds_allowed; bool kvm_irqfds_allowed; bool kvm_msi_via_irqfd_allowed; bool kvm_gsi_routing_allowed; @@ -1541,6 +1542,9 @@ int kvm_init(MachineClass *mc) (kvm_check_extension(s, KVM_CAP_READONLY_MEM) > 0); #endif + kvm_eventfds_allowed = + (kvm_check_extension(s, KVM_CAP_IOEVENTFD) > 0); + ret = kvm_arch_init(s); if (ret < 0) { goto err; diff --git a/kvm-stub.c b/kvm-stub.c index ac33d8666d..8e7737caa9 100644 --- a/kvm-stub.c +++ b/kvm-stub.c @@ -22,6 +22,7 @@ KVMState *kvm_state; bool kvm_kernel_irqchip; bool kvm_async_interrupts_allowed; +bool kvm_eventfds_allowed; bool kvm_irqfds_allowed; bool kvm_msi_via_irqfd_allowed; bool kvm_gsi_routing_allowed; |