diff options
| author | Eric Auger <eric.auger@linaro.org> | 2014-10-31 13:38:18 +0000 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2014-12-15 12:21:01 +0100 |
| commit | f41389ae3c54bd5e2040e3f95a2872981c3ed965 (patch) | |
| tree | 212d9e2c0a1d7e130a526b66ad10b6edc585284a /include/sysemu/kvm.h | |
| parent | 9551ea6991cfb7c777f7943ad69b30d0a4fadac3 (diff) | |
KVM_CAP_IRQFD and KVM_CAP_IRQFD_RESAMPLE checks
Compute kvm_irqfds_allowed by checking the KVM_CAP_IRQFD extension.
Remove direct settings in architecture specific files.
Add a new kvm_resamplefds_allowed variable, initialized by
checking the KVM_CAP_IRQFD_RESAMPLE extension. Add a corresponding
kvm_resamplefds_enabled() function.
A special notice for s390 where KVM_CAP_IRQFD was not immediatly
advirtised when irqfd capability was introduced in the kernel.
KVM_CAP_IRQ_ROUTING was advertised instead.
This was fixed in "KVM: s390: announce irqfd capability",
ebc3226202d5956a5963185222982d435378b899 whereas irqfd support
was brought in 84223598778ba08041f4297fda485df83414d57e,
"KVM: s390: irq routing for adapter interrupts". Both commits
first appear in 3.15 so there should not be any kernel
version impacted by this QEMU modification.
Signed-off-by: Eric Auger <eric.auger@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'include/sysemu/kvm.h')
| -rw-r--r-- | include/sysemu/kvm.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/include/sysemu/kvm.h b/include/sysemu/kvm.h index 22e42ef236..104cf3535e 100644 --- a/include/sysemu/kvm.h +++ b/include/sysemu/kvm.h @@ -45,6 +45,7 @@ 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_resamplefds_allowed; extern bool kvm_msi_via_irqfd_allowed; extern bool kvm_gsi_routing_allowed; extern bool kvm_gsi_direct_mapping; @@ -102,6 +103,15 @@ extern bool kvm_readonly_mem_allowed; #define kvm_irqfds_enabled() (kvm_irqfds_allowed) /** + * kvm_resamplefds_enabled: + * + * Returns: true if we can use resamplefds to inject interrupts into + * a KVM CPU (ie the kernel supports resamplefds and we are running + * with a configuration where it is meaningful to use them). + */ +#define kvm_resamplefds_enabled() (kvm_resamplefds_allowed) + +/** * kvm_msi_via_irqfd_enabled: * * Returns: true if we can route a PCI MSI (Message Signaled Interrupt) |