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KVM: PPC: Book3S HV: Use the new IRQ chip to detect passthrough interrupts

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Passthrough PCI MSI interrupts are detected in KVM with a check on a
specific EOI handler (P8) or on XIVE (P9). We can now check the
PCI-MSI IRQ chip which is cleaner.

Signed-off-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20210701132750.1475580-14-clg@kaod.org
This commit is contained in:
Cédric Le Goater 2021-07-01 15:27:31 +02:00 committed by Michael Ellerman
parent 0fcfe2247e
commit ba418a0278
2 changed files with 4 additions and 2 deletions
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2
arch/powerpc/kvm/book3s_hv.c
View file

@ -5355,7 +5355,7 @@ static int kvmppc_set_passthru_irq(struct kvm *kvm, int host_irq, int guest_gsi)
* what our real-mode EOI code does, or a XIVE interrupt
*/
chip = irq_data_get_irq_chip(&desc->irq_data);
if (!chip || !(is_pnv_opal_msi(chip) || is_xive_irq(chip))) {
if (!chip || !is_pnv_opal_msi(chip)) {
pr_warn("kvmppc_set_passthru_irq_hv: Could not assign IRQ map for (%d,%d)\n",
host_irq, guest_gsi);
mutex_unlock(&kvm->lock);

4
arch/powerpc/platforms/powernv/pci-ioda.c
View file

@ -2007,13 +2007,15 @@ void pnv_set_msi_irq_chip(struct pnv_phb *phb, unsigned int virq)
irq_set_chip(virq, &phb->ioda.irq_chip);
}
static struct irq_chip pnv_pci_msi_irq_chip;
/*
* Returns true iff chip is something that we could call
* pnv_opal_pci_msi_eoi for.
*/
bool is_pnv_opal_msi(struct irq_chip *chip)
{
return chip->irq_eoi == pnv_ioda2_msi_eoi;
return chip->irq_eoi == pnv_ioda2_msi_eoi || chip == &pnv_pci_msi_irq_chip;
}
EXPORT_SYMBOL_GPL(is_pnv_opal_msi);