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KVM: PPC: Book3S: Facilities to save/restore XICS presentation ctrler state

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This adds the ability for userspace to save and restore the state
of the XICS interrupt presentation controllers (ICPs) via the
KVM_GET/SET_ONE_REG interface.  Since there is one ICP per vcpu, we
simply define a new 64-bit register in the ONE_REG space for the ICP
state.  The state includes the CPU priority setting, the pending IPI
priority, and the priority and source number of any pending external
interrupt.

Signed-off-by: Paul Mackerras <[email protected]>
Signed-off-by: Alexander Graf <[email protected]>
This commit is contained in:
Paul Mackerras 2013-04-17 20:32:26 +00:00 • committed by Alexander Graf
commit 8b78645c93
5 changed files with 124 additions and 0 deletions
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1
Documentation/virtual/kvm/api.txt
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@ -1808,6 +1808,7 @@ registers, find a list below:
PPC | KVM_REG_PPC_TLB2PS | 32
PPC | KVM_REG_PPC_TLB3PS | 32
PPC | KVM_REG_PPC_EPTCFG | 32
PPC | KVM_REG_PPC_ICP_STATE | 64
ARM registers are mapped using the lower 32 bits. The upper 16 of that
is the register group type, or coprocessor number: