| Message ID | 1373886679-19581-2-git-send-email-Bharat.Bhushan@freescale.com |
|---|---|
| State | New, archived |
| Headers | show |
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.bhushan@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-ppc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
> -----Original Message----- > From: Alexander Graf [mailto:agraf@suse.de] > Sent: Monday, July 15, 2013 4:51 PM > To: Bhushan Bharat-R65777 > Cc: kvm@vger.kernel.org; kvm-ppc@vger.kernel.org; Wood Scott-B07421; Yoder > Stuart-B08248; Bhushan Bharat-R65777 > Subject: Re: [PATCH 1/5] powerpc: define ePAPR hcall exit interface > > > 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. Ok, will make this "kvm: powerpc: define ePAPR hcall exit interface" > > > > > Signed-off-by: Bharat Bhushan <bharat.bhushan@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. Ok. -Bharat > > > Alex > > > /* KVM_EXIT_S390_TSCH */ > > struct { > > __u16 subchannel_id; > > -- > > 1.7.0.4 > > > > > -- To unsubscribe from this list: send the line "unsubscribe kvm-ppc" 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 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; /* KVM_EXIT_S390_TSCH */ struct { __u16 subchannel_id;
This patch defines the ePAPR hcall exit interface to guest user space. Signed-off-by: Bharat Bhushan <bharat.bhushan@freescale.com> --- Documentation/virtual/kvm/api.txt | 20 ++++++++++++++++++++ include/uapi/linux/kvm.h | 7 +++++++ 2 files changed, 27 insertions(+), 0 deletions(-)