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xics/kvm: Add proper rollback to xics_kvm_init()

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Make xics_kvm_disconnect() able to undo the changes of a partial execution
of xics_kvm_connect() and use it to perform rollback.

Note that kvmppc_define_rtas_kernel_token(0) never fails, no matter the
RTAS call has been defined or not.

Signed-off-by: Greg Kurz <groug@kaod.org>
Message-Id: <156077922319.433243.609897156640506891.stgit@bahia.lan>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Greg Kurz 2019-06-17 15:47:03 +02:00 committed by David Gibson
parent 330a21e3c4
commit 4812f26152
1 changed files with 5 additions and 6 deletions
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11
hw/intc/xics_kvm.c
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@ -421,10 +421,7 @@ int xics_kvm_connect(SpaprMachineState *spapr, Error **errp)
fail:
error_propagate(errp, local_err);
kvmppc_define_rtas_kernel_token(0, "ibm,set-xive");
kvmppc_define_rtas_kernel_token(0, "ibm,get-xive");
kvmppc_define_rtas_kernel_token(0, "ibm,int-on");
kvmppc_define_rtas_kernel_token(0, "ibm,int-off");
xics_kvm_disconnect(spapr, NULL);
return -1;
}
@ -448,8 +445,10 @@ void xics_kvm_disconnect(SpaprMachineState *spapr, Error **errp)
* removed from the list of devices of the VM. The VCPU presenters
* are also detached from the device.
*/
close(kernel_xics_fd);
kernel_xics_fd = -1;
if (kernel_xics_fd != -1) {
close(kernel_xics_fd);
kernel_xics_fd = -1;
}
kvmppc_define_rtas_kernel_token(0, "ibm,set-xive");
kvmppc_define_rtas_kernel_token(0, "ibm,get-xive");