[PATCH v2 15/32] KVM: PPC: Book3S HV: XIVE: Fix mapping of passthrough interrupts

[Cédric Le Goater]

PCI MSI interrupt numbers are now mapped in a PCI-MSI domain but the
underlying calls handling the passthrough of the interrupt in the
guest need a number in the XIVE IRQ domain.

Use the IRQ data mapped in the XIVE IRQ domain and not the one in the
PCI-MSI domain.

Cc: Thomas Gleixner <t...@linutronix.de>
Signed-off-by: Cédric Le Goater <c...@kaod.org>
---
 arch/powerpc/kvm/book3s_xive.c | 3 ++-
 kernel/irq/irqdomain.c         | 1 +
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/arch/powerpc/kvm/book3s_xive.c b/arch/powerpc/kvm/book3s_xive.c
index 434da541a20b..d30eb35cc7f0 100644
--- a/arch/powerpc/kvm/book3s_xive.c
+++ b/arch/powerpc/kvm/book3s_xive.c
@@ -926,7 +926,8 @@ int kvmppc_xive_set_mapped(struct kvm *kvm, unsigned long 
guest_irq,
        struct kvmppc_xive *xive = kvm->arch.xive;
        struct kvmppc_xive_src_block *sb;
        struct kvmppc_xive_irq_state *state;
-       struct irq_data *host_data = irq_get_irq_data(host_irq);
+       struct irq_data *host_data =
+               irq_domain_get_irq_data(irq_get_default_host(), host_irq);
        unsigned int hw_irq = (unsigned int)irqd_to_hwirq(host_data);
        u16 idx;
        u8 prio;
diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c
index 6284443b87ec..c8c06318dcbf 100644
--- a/kernel/irq/irqdomain.c
+++ b/kernel/irq/irqdomain.c
@@ -481,6 +481,7 @@ struct irq_domain *irq_get_default_host(void)
 {
        return irq_default_domain;
 }
+EXPORT_SYMBOL_GPL(irq_get_default_host);
 
 static void irq_domain_clear_mapping(struct irq_domain *domain,
                                     irq_hw_number_t hwirq)
-- 
2.31.1