| Message ID | 1314621244-4360-1-git-send-email-levinsasha928@gmail.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On 08/29/2011 03:34 PM, Sasha Levin wrote: > Cc: Avi Kivity<avi@redhat.com> > Cc: Marcelo Tosatti<mtosatti@redhat.com> > Signed-off-by: Sasha Levin<levinsasha928@gmail.com> Thanks, applied. > +Returns: 0 on success, !0 on error > + -1 (I fixed this).
On Mon, 2011-08-29 at 15:37 +0300, Avi Kivity wrote: > On 08/29/2011 03:34 PM, Sasha Levin wrote: > > Cc: Avi Kivity<avi@redhat.com> > > Cc: Marcelo Tosatti<mtosatti@redhat.com> > > Signed-off-by: Sasha Levin<levinsasha928@gmail.com> > > Thanks, applied. > > > +Returns: 0 on success, !0 on error > > + > > -1 (I fixed this). > Why -1? It could be anything < 0, no?
On 08/29/2011 03:43 PM, Sasha Levin wrote: > On Mon, 2011-08-29 at 15:37 +0300, Avi Kivity wrote: > > On 08/29/2011 03:34 PM, Sasha Levin wrote: > > > Cc: Avi Kivity<avi@redhat.com> > > > Cc: Marcelo Tosatti<mtosatti@redhat.com> > > > Signed-off-by: Sasha Levin<levinsasha928@gmail.com> > > > > Thanks, applied. > > > > > +Returns: 0 on success, !0 on error > > > + > > > > -1 (I fixed this). > > > > Why -1? It could be anything< 0, no? > No. ioctl()s (and most system calls) return -1 on error and set errno.
On 08/29/2011 07:34 AM, Sasha Levin wrote: > Cc: Avi Kivity <avi@redhat.com> > Cc: Marcelo Tosatti <mtosatti@redhat.com> > Signed-off-by: Sasha Levin <levinsasha928@gmail.com> > --- > Documentation/virtual/kvm/api.txt | 27 +++++++++++++++++++++++++++ > 1 files changed, 27 insertions(+), 0 deletions(-) > > diff --git a/Documentation/virtual/kvm/api.txt b/Documentation/virtual/kvm/api.txt > index 2d510b6..d1150b6 100644 > --- a/Documentation/virtual/kvm/api.txt > +++ b/Documentation/virtual/kvm/api.txt > @@ -1450,6 +1450,33 @@ is supported; 2 if the processor requires all virtual machines to have > an RMA, or 1 if the processor can use an RMA but doesn't require it, > because it supports the Virtual RMA (VRMA) facility. > > +4.64 KVM_IRQFD > + > +Capability: KVM_CAP_IRQFD > +Architectures: all > +Type: vm ioctl > +Parameters: struct kvm_irqfd (in) > +Returns: 0 on success, !0 on error > + > +This ioctl attaches or detaches an eventfd to a GSI within the guest. > +While the eventfd is assigned to the guest, any write to the eventfd > +would trigger the GSI within the guest. > + > +struct kvm_irqfd { > + __u32 fd; > + __u32 gsi; > + __u32 flags; > + __u8 pad[20]; > +}; Should define "gsi" (and how it's used by KVM) somewhere. AFAICT it's an ACPI-ism. -Scott -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/Documentation/virtual/kvm/api.txt b/Documentation/virtual/kvm/api.txt index 2d510b6..d1150b6 100644 --- a/Documentation/virtual/kvm/api.txt +++ b/Documentation/virtual/kvm/api.txt @@ -1450,6 +1450,33 @@ is supported; 2 if the processor requires all virtual machines to have an RMA, or 1 if the processor can use an RMA but doesn't require it, because it supports the Virtual RMA (VRMA) facility. +4.64 KVM_IRQFD + +Capability: KVM_CAP_IRQFD +Architectures: all +Type: vm ioctl +Parameters: struct kvm_irqfd (in) +Returns: 0 on success, !0 on error + +This ioctl attaches or detaches an eventfd to a GSI within the guest. +While the eventfd is assigned to the guest, any write to the eventfd +would trigger the GSI within the guest. + +struct kvm_irqfd { + __u32 fd; + __u32 gsi; + __u32 flags; + __u8 pad[20]; +}; + +The following flags are defined: + +#define KVM_IRQFD_FLAG_DEASSIGN (1 << 0) + +If deassign flag is set, the eventfd will be deassigned from the GSI and +further writes to the eventfd won't trigger the GSI. + + 5. The kvm_run structure Application code obtains a pointer to the kvm_run structure by
Cc: Avi Kivity <avi@redhat.com> Cc: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Sasha Levin <levinsasha928@gmail.com> --- Documentation/virtual/kvm/api.txt | 27 +++++++++++++++++++++++++++ 1 files changed, 27 insertions(+), 0 deletions(-)