[PATCH 5/7] xen: add xen hvm acpi_register_gsi variant

[stefano.stabellini@eu.citrix.com]

From: Jeremy Fitzhardinge <jeremy@goop.org>

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
---
 arch/x86/include/asm/acpi.h |    3 +++
 arch/x86/kernel/acpi/boot.c |    3 ++-
 arch/x86/pci/xen.c          |    7 +++++++
 3 files changed, 12 insertions(+), 1 deletions(-)

diff --git a/arch/x86/include/asm/acpi.h b/arch/x86/include/asm/acpi.h
index 92091de..55d106b 100644
--- a/arch/x86/include/asm/acpi.h
+++ b/arch/x86/include/asm/acpi.h
@@ -93,6 +93,9 @@ extern u8 acpi_sci_flags;
 extern int acpi_sci_override_gsi;
 void acpi_pic_sci_set_trigger(unsigned int, u16);
 
+extern int (*__acpi_register_gsi)(struct device *dev, u32 gsi,
+				  int trigger, int polarity);
+
 static inline void disable_acpi(void)
 {
 	acpi_disabled = 1;
diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c
index 031f0c2..71232b9 100644
--- a/arch/x86/kernel/acpi/boot.c
+++ b/arch/x86/kernel/acpi/boot.c
@@ -537,7 +537,8 @@ static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi,
 	return gsi;
 }
 
-static int (*__acpi_register_gsi)(struct device *dev, u32 gsi, int trigger, int polarity) = acpi_register_gsi_pic;
+int (*__acpi_register_gsi)(struct device *dev, u32 gsi,
+			   int trigger, int polarity) = acpi_register_gsi_pic;
 
 /*
  * success: return IRQ number (>=0)
diff --git a/arch/x86/pci/xen.c b/arch/x86/pci/xen.c
index d6fd58f..0ed1cae 100644
--- a/arch/x86/pci/xen.c
+++ b/arch/x86/pci/xen.c
@@ -152,6 +152,13 @@ static int xen_pcifront_enable_irq(struct pci_dev *dev)
 	return 0;
 }
 
+static int acpi_register_gsi_xen_hvm(struct device *dev, u32 gsi,
+				 int trigger, int polarity)
+{
+	return xen_hvm_register_pirq(gsi, trigger);
+}
+
+
 int __init pci_xen_init(void)
 {
 	if (!xen_pv_domain() || xen_initial_domain())
-- 
1.5.6.5