Linux will implement an MSI domain for MSI/MSI-X when running as root on
Microsoft Hypervisor. It will be using this function to reduce code
duplication.
Signed-off-by: Wei Liu <[email protected]>
---
arch/x86/include/asm/msi.h | 3 +++
arch/x86/kernel/apic/msi.c | 3 ++-
2 files changed, 5 insertions(+), 1 deletion(-)
diff --git a/arch/x86/include/asm/msi.h b/arch/x86/include/asm/msi.h
index 25ddd0916bb2..5c0e102c03ec 100644
--- a/arch/x86/include/asm/msi.h
+++ b/arch/x86/include/asm/msi.h
@@ -11,4 +11,7 @@ int pci_msi_prepare(struct irq_domain *domain, struct device *dev, int nvec,
void pci_msi_set_desc(msi_alloc_info_t *arg, struct msi_desc *desc);
+struct msi_domain_info;
+irq_hw_number_t pci_msi_get_hwirq(struct msi_domain_info *info, msi_alloc_info_t *arg);
+
#endif /* _ASM_X86_MSI_H */
diff --git a/arch/x86/kernel/apic/msi.c b/arch/x86/kernel/apic/msi.c
index c2b2911feeef..dc9693a73933 100644
--- a/arch/x86/kernel/apic/msi.c
+++ b/arch/x86/kernel/apic/msi.c
@@ -205,11 +205,12 @@ void native_teardown_msi_irq(unsigned int irq)
irq_domain_free_irqs(irq, 1);
}
-static irq_hw_number_t pci_msi_get_hwirq(struct msi_domain_info *info,
+irq_hw_number_t pci_msi_get_hwirq(struct msi_domain_info *info,
msi_alloc_info_t *arg)
{
return arg->msi_hwirq;
}
+EXPORT_SYMBOL_GPL(pci_msi_get_hwirq);
int pci_msi_prepare(struct irq_domain *domain, struct device *dev, int nvec,
msi_alloc_info_t *arg)
--
2.20.1