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KVM: PPC: Book3S HV: XIVE: Add a mapping for the source ESB pages

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Each source is associated with an Event State Buffer (ESB) with a
even/odd pair of pages which provides commands to manage the source:
to trigger, to EOI, to turn off the source for instance.

The custom VM fault handler will deduce the guest IRQ number from the
offset of the fault, and the ESB page of the associated XIVE interrupt
will be inserted into the VMA using the internal structure caching
information on the interrupts.

Signed-off-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
This commit is contained in:
Cédric Le Goater
2019-04-18 12:39:38 +02:00
committed by Paul Mackerras
parent 39e9af3de5
commit 6520ca64cd
3 changed files with 65 additions and 0 deletions
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arch/powerpc/include/uapi/asm/kvm.h
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@@ -721,5 +721,6 @@ struct kvm_ppc_xive_eq {
#define KVM_XIVE_EQ_ALWAYS_NOTIFY 0x00000001
#define KVM_XIVE_TIMA_PAGE_OFFSET 0
#define KVM_XIVE_ESB_PAGE_OFFSET 4
#endif /* __LINUX_KVM_POWERPC_H */