Re: [win-pv-devel] FW: [PATCH 2/3] Attempt to reset event channel ABI to 2-Layer

[Paul Durrant <Paul.Durrant@xxxxxxxxxx>]

> -----Original Message-----
> From: win-pv-devel-bounces@xxxxxxxxxxxxxxxxxxxx [mailto:win-pv-devel-
> bounces@xxxxxxxxxxxxxxxxxxxx] On Behalf Of Owen Smith
> Sent: 25 February 2015 10:30
> To: win-pv-devel@xxxxxxxxxxxxxxxxxxxx
> Subject: [win-pv-devel] FW: [PATCH 2/3] Attempt to reset event channel ABI
> to 2-Layer
> 
> Sent to wrong address!

I'm afraid this is mangled. Best to send again.

  Paul

> 
> > -----Original Message-----
> > From: Owen Smith [mailto:owen.smith@xxxxxxxxxx]
> > Sent: 24 February 2015 18:05
> > To: win-pv-devel@xxxxxxxxxxxxxxxxxxx
> > Cc: Owen Smith
> > Subject: [PATCH 2/3] Attempt to reset event channel ABI to 2-Layer
> >
> > Signed-off-by: Owen Smith <owen.smith@xxxxxxxxxx>
> > ---
> >  src/xencrsh/evtchn.c | 96
> > ++++++++++++++++++++++++++++++++++++++++++++++++++++
> >  src/xencrsh/evtchn.h | 19 +++++++++++
> >  src/xencrsh/store.c  | 33 +++++++++++++++---
> >  3 files changed, 144 insertions(+), 4 deletions(-)
> >
> > diff --git a/src/xencrsh/evtchn.c b/src/xencrsh/evtchn.c index
> > b0b5b93..ecf100b 100644
> > --- a/src/xencrsh/evtchn.c
> > +++ b/src/xencrsh/evtchn.c
> > @@ -87,6 +87,102 @@ fail1:
> >  }
> >
> >  NTSTATUS
> > +EventChannelReset(
> > +    VOID
> > +    )
> > +{
> > +    struct evtchn_reset op;
> > +    LONG_PTR            rc;
> > +    NTSTATUS            status;
> > +
> > +    op.dom = DOMID_SELF;
> > +
> > +    rc = EventChannelOp(EVTCHNOP_reset, &op);
> > +
> > +    if (rc < 0) {
> > +        ERRNO_TO_STATUS(-rc, status);
> > +        goto fail1;
> > +    }
> > +
> > +    return STATUS_SUCCESS;
> > +
> > +fail1:
> > +    LogError("fail1 (%08x)\n", status);
> > +
> > +    return status;
> > +}
> > +
> > +NTSTATUS
> > +EventChannelBindInterDomain(
> > +    IN  USHORT                      RemoteDomain,
> > +    IN  ULONG                       RemotePort,
> > +    OUT PULONG                      LocalPort
> > +    )
> > +{
> > +    struct evtchn_bind_interdomain  op;
> > +    LONG_PTR                        rc;
> > +    NTSTATUS                        status;
> > +
> > +    op.remote_dom = RemoteDomain,
> > +    op.remote_port = RemotePort;
> > +
> > +    rc = EventChannelOp(EVTCHNOP_bind_interdomain, &op);
> > +
> > +    if (rc < 0) {
> > +        ERRNO_TO_STATUS(-rc, status);
> > +        goto fail1;
> > +    }
> > +
> > +    *LocalPort = op.local_port;
> > +
> > +    return STATUS_SUCCESS;
> > +
> > +fail1:
> > +    LogError("fail1 (%08x)\n", status);
> > +
> > +    return status;
> > +}
> > +
> > +NTSTATUS
> > +EventChannelQueryInterDomain(
> > +    IN  ULONG               LocalPort,
> > +    OUT PUSHORT             RemoteDomain,
> > +    OUT PULONG              RemotePort
> > +    )
> > +{
> > +    struct evtchn_status    op;
> > +    LONG_PTR                rc;
> > +    NTSTATUS                status;
> > +
> > +    op.dom = DOMID_SELF;
> > +    op.port = LocalPort;
> > +
> > +    rc = EventChannelOp(EVTCHNOP_status, &op);
> > +
> > +    if (rc < 0) {
> > +        ERRNO_TO_STATUS(-rc, status);
> > +        goto fail1;
> > +    }
> > +
> > +    status = STATUS_INVALID_PARAMETER;
> > +    if (op.status != EVTCHNSTAT_interdomain)
> > +        goto fail2;
> > +
> > +    *RemoteDomain = op.u.interdomain.dom;
> > +    *RemotePort = op.u.interdomain.port;
> > +
> > +    return STATUS_SUCCESS;
> > +
> > +fail2:
> > +    LogError("fail2\n");
> > +
> > +fail1:
> > +    LogError("fail1 (%08x)\n", status);
> > +
> > +    return status;
> > +}
> > +
> > +NTSTATUS
> >  EventChannelAllocate(
> >      IN  ULONG           Domain,
> >      OUT PULONG          LocalPort
> > diff --git a/src/xencrsh/evtchn.h b/src/xencrsh/evtchn.h index
> > 2fa3812..9540bd8 100644
> > --- a/src/xencrsh/evtchn.h
> > +++ b/src/xencrsh/evtchn.h
> > @@ -42,6 +42,25 @@ EventChannelSend(
> >      );
> >
> >  NTSTATUS
> > +EventChannelReset(
> > +    VOID
> > +    );
> > +
> > +NTSTATUS
> > +EventChannelBindInterDomain(
> > +    IN  USHORT          RemoteDomain,
> > +    IN  ULONG           RemotePort,
> > +    OUT PULONG          LocalPort
> > +    );
> > +
> > +NTSTATUS
> > +EventChannelQueryInterDomain(
> > +    IN  ULONG           LocalPort,
> > +    OUT PUSHORT         RemoteDomain,
> > +    OUT PULONG          RemotePort
> > +    );
> > +
> > +NTSTATUS
> >  EventChannelAllocate(
> >      IN  ULONG           Domain,
> >      OUT PULONG          LocalPort
> > diff --git a/src/xencrsh/store.c b/src/xencrsh/store.c index
> d474d5e..163dcc5
> > 100644
> > --- a/src/xencrsh/store.c
> > +++ b/src/xencrsh/store.c
> > @@ -1063,7 +1063,10 @@ NTSTATUS
> >  StoreInitialize()
> >  {
> >      ULONGLONG                   Mfn;
> > -    ULONGLONG                   Port;
> > +    ULONGLONG                   Value;
> > +    ULONG                       LocalPort;
> > +    ULONG                       RemotePort;
> > +    USHORT                      RemoteDomain;
> >      PHYSICAL_ADDRESS            PhysAddr;
> >      NTSTATUS                    Status;
> >      struct xenstore_domain_interface*  StoreRingPtr; @@ -1071,12
> +1074,34
> > @@ StoreInitialize()
> >      InitializeListHead(&StoreContext.SubmittedList);
> >      InitializeListHead(&StoreContext.PendingList);
> >
> > -    Status = HvmGetParameter(HVM_PARAM_STORE_EVTCHN, &Port);
> > +    Status = HvmGetParameter(HVM_PARAM_STORE_EVTCHN, &Value);
> >      if (!NT_SUCCESS(Status))
> >          goto fail1;
> >
> > -    LogVerbose("HVM_PARAM_STORE_EVTCHN = %08x\n", (ULONG)Port);
> > -    StoreContext.Port = (evtchn_port_t)Port;
> > +    LocalPort = (ULONG)Value;
> > +
> > +    LogVerbose("OLD HVM_PARAM_STORE_EVTCHN = %08x\n",
> LocalPort);
> > +
> > +    Status = EventChannelQueryInterDomain(LocalPort,
> > +                                          &RemoteDomain,
> > +                                          &RemotePort);
> > +    LogTrace("EventChannelQueryInterDomain(&u) (%08x) %u:%u\n",
> > +             LocalPort, Status, RemoteDomain, RemotePort);
> > +
> > +    Status = EventChannelReset();
> > +    LogTrace("EventChannelReset() (%08x)\n", Status);
> > +
> > +    Status = EventChannelBindInterDomain(RemoteDomain,
> > +                                         RemotePort,
> > +                                         &LocalPort);
> > +    LogTrace("EventChannelBindInterDomain(%u:%u) (%08x) %u\n",
> > +             RemoteDomain, RemotePort, Status, LocalPort);
> > +
> > +    Value = LocalPort;
> > +    Status = HvmSetParameter(HVM_PARAM_STORE_EVTCHN, Value);
> > +    LogTrace("HvmSetParameter(STORE_EVTCHN, %u) (%08x)\n", Value,
> > + Status);
> > +
> > +    StoreContext.Port = (evtchn_port_t)LocalPort;
> >
> >      Status = HvmGetParameter(HVM_PARAM_STORE_PFN, &Mfn);
> >      if (!NT_SUCCESS(Status))
> > --
> > 1.9.4.msysgit.1
> 
> 
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