PCI MSIs now live in an MSI domain but the underlying calls, which
will EOI the interrupt in real mode, need an HW IRQ number mapped in
the XICS IRQ domain. Grab it there.
Cc: Paul Mackerras <pau...@ozlabs.org>
Cc: Alexey Kardashevskiy <a...@ozlabs.ru>
Signed-off-by: Cédric Le Goater <c...@kaod.org>
---
arch/powerpc/kvm/book3s_hv.c | 12 ++++++++++--
1 file changed, 10 insertions(+), 2 deletions(-)
diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c
index 9f4eb74a11cc..6058bcc5b61e 100644
--- a/arch/powerpc/kvm/book3s_hv.c
+++ b/arch/powerpc/kvm/book3s_hv.c
@@ -5126,6 +5126,7 @@ static int kvmppc_set_passthru_irq(struct kvm *kvm, int
host_irq, int guest_gsi)
struct kvmppc_passthru_irqmap *pimap;
struct irq_chip *chip;
int i, rc = 0;
+ struct irq_data *host_data;
if (!kvm_irq_bypass)
return 1;
@@ -5190,7 +5191,14 @@ static int kvmppc_set_passthru_irq(struct kvm *kvm, int
host_irq, int guest_gsi)
* the KVM real mode handler.
*/
smp_wmb();
- irq_map->r_hwirq = desc->irq_data.hwirq;
+
+ /*
+ * The 'host_irq' number is mapped in the PCI-MSI domain but
+ * the underlying calls, which will EOI the interrupt in real
+ * mode, need an HW IRQ number mapped in the XICS IRQ domain.
+ */
+ host_data = irq_domain_get_irq_data(irq_get_default_host(), host_irq);
+ irq_map->r_hwirq = (unsigned int)irqd_to_hwirq(host_data);
if (i == pimap->n_mapped)
pimap->n_mapped++;
@@ -5198,7 +5206,7 @@ static int kvmppc_set_passthru_irq(struct kvm *kvm, int
host_irq, int guest_gsi)
if (xics_on_xive())
rc = kvmppc_xive_set_mapped(kvm, guest_gsi, host_irq);
else
- kvmppc_xics_set_mapped(kvm, guest_gsi, desc->irq_data.hwirq);
+ kvmppc_xics_set_mapped(kvm, guest_gsi, irq_map->r_hwirq);
if (rc)
irq_map->r_hwirq = 0;
--
2.26.3
