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d3695aa4f4
This adds real and virtual mode handlers for the H_PUT_TCE_INDIRECT and H_STUFF_TCE hypercalls for user space emulated devices such as IBMVIO devices or emulated PCI. These calls allow adding multiple entries (up to 512) into the TCE table in one call which saves time on transition between kernel and user space. The current implementation of kvmppc_h_stuff_tce() allows it to be executed in both real and virtual modes so there is one helper. The kvmppc_rm_h_put_tce_indirect() needs to translate the guest address to the host address and since the translation is different, there are 2 helpers - one for each mode. This implements the KVM_CAP_PPC_MULTITCE capability. When present, the kernel will try handling H_PUT_TCE_INDIRECT and H_STUFF_TCE if these are enabled by the userspace via KVM_CAP_PPC_ENABLE_HCALL. If they can not be handled by the kernel, they are passed on to the user space. The user space still has to have an implementation for these. Both HV and PR-syle KVM are supported. Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Reviewed-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org> |
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