On 15.07.2013, at 13:11, Bharat Bhushan wrote: > This patch defines the ePAPR hcall exit interface to guest user space.
The subject line is misleading. This is a kvm patch. Same applies for most other patches. > > Signed-off-by: Bharat Bhushan <bharat.bhus...@freescale.com> > --- > Documentation/virtual/kvm/api.txt | 20 ++++++++++++++++++++ > include/uapi/linux/kvm.h | 7 +++++++ > 2 files changed, 27 insertions(+), 0 deletions(-) > > diff --git a/Documentation/virtual/kvm/api.txt > b/Documentation/virtual/kvm/api.txt > index 66dd2aa..054f2f4 100644 > --- a/Documentation/virtual/kvm/api.txt > +++ b/Documentation/virtual/kvm/api.txt > @@ -2597,6 +2597,26 @@ The possible hypercalls are defined in the Power > Architecture Platform > Requirements (PAPR) document available from www.power.org (free > developer registration required to access it). > > + /* KVM_EXIT_EPAPR_HCALL */ > + struct { > + __u64 nr; > + __u64 ret; > + __u64 args[8]; > + } epapr_hcall; > + > +This is used on PowerPC platforms that support ePAPR hcalls. > +It occurs when a guest does a hypercall (as defined > +in the ePAPR 1.1) and the hcall is not handled by the kernel. > + > +The 'nr' field contains the hypercall number (from the guest R11), > +and 'args' contains the arguments (from the guest R3 - R10). > +Userspace should put the return code in 'ret' and any extra returned > +values in args[]. If the VM is not in 64-bit mode KVM zeros > +the upper half of each field in the struct. > + > +As per the ePAPR hcall ABI, the return value is returned to > +the guest in R3 and output return values in R4 - R10. > + > /* KVM_EXIT_S390_TSCH */ > struct { > __u16 subchannel_id; > diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h > index acccd08..01ee50e 100644 > --- a/include/uapi/linux/kvm.h > +++ b/include/uapi/linux/kvm.h > @@ -171,6 +171,7 @@ struct kvm_pit_config { > #define KVM_EXIT_WATCHDOG 21 > #define KVM_EXIT_S390_TSCH 22 > #define KVM_EXIT_EPR 23 > +#define KVM_EXIT_EPAPR_HCALL 24 > > /* For KVM_EXIT_INTERNAL_ERROR */ > /* Emulate instruction failed. */ > @@ -288,6 +289,12 @@ struct kvm_run { > __u64 ret; > __u64 args[9]; > } papr_hcall; > + /* KVM_EXIT_EPAPR_HCALL */ > + struct { > + __u64 nr; > + __u64 ret; > + __u64 args[8]; > + } epapr_hcall; This should be at the end of the union. Alex > /* KVM_EXIT_S390_TSCH */ > struct { > __u16 subchannel_id; > -- > 1.7.0.4 > > -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html