KVM: PPC: Book3S HV: Keep XIVE escalation interrupt masked unless ceded

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This works on top of the single escalation support. When in single
escalation, with this change, we will keep the escalation interrupt
disabled unless the VCPU is in H_CEDE (idle). In any other case, we
know the VCPU will be rescheduled and thus there is no need to take
escalation interrupts in the host whenever a guest interrupt fires.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>

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Benjamin Herrenschmidt 2018-01-12 13:37:16 +11:00 • committed by Paul Mackerras

parent 35c2405efc

commit 9b9b13a6d1

4 changed files with 97 additions and 1 deletions

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3

arch/powerpc/include/asm/kvm_host.h

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3

arch/powerpc/kernel/asm-offsets.c

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62

arch/powerpc/kvm/book3s_hv_rmhandlers.S

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30

arch/powerpc/kvm/book3s_xive.c

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