[PATCH v4 05/11] xen/arm: Mark device as PCI while creating one

[Oleksandr Andrushchenko <andr2000@xxxxxxxxx>]

From: Oleksandr Andrushchenko <oleksandr_andrushchenko@xxxxxxxx>

While adding a PCI device mark it as such, so other frameworks
can distinguish it from DT devices.
For that introduce an architecture defined helper which may perform
additional initialization of the newly created PCI device.

Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
Cc: Paul Durrant <paul@xxxxxxx>
Signed-off-by: Oleksandr Andrushchenko <oleksandr_andrushchenko@xxxxxxxx>
[applicable parts]
Acked-by: Jan Beulich <jbeulich@xxxxxxxx>
---
Since v3:
- fixed Arm build without CONFIG_HAS_PCI
Since v2:
 - !! dropped Stefano's r-b because of the changes
 - introduced arch_pci_init_pdev (Jan)
Since v1:
 - moved the assignment from iommu_add_device to alloc_pdev
---
 xen/arch/arm/pci/pci.c        | 5 +++++
 xen/drivers/passthrough/pci.c | 2 ++
 xen/include/asm-arm/pci.h     | 7 +++++++
 xen/include/asm-x86/pci.h     | 2 ++
 4 files changed, 16 insertions(+)

diff --git a/xen/arch/arm/pci/pci.c b/xen/arch/arm/pci/pci.c
index 138da19284ab..082c14e127a8 100644
--- a/xen/arch/arm/pci/pci.c
+++ b/xen/arch/arm/pci/pci.c
@@ -34,6 +34,11 @@ struct pci_dev *dev_to_pci(struct device *dev)
     return container_of(dev, struct pci_dev, arch.dev);
 }
 
+void arch_pci_init_pdev(struct pci_dev *pdev)
+{
+    pci_to_dev(pdev)->type = DEV_PCI;
+}
+
 static int __init dt_pci_init(void)
 {
     struct dt_device_node *np;
diff --git a/xen/drivers/passthrough/pci.c b/xen/drivers/passthrough/pci.c
index b36d5a481162..9e6246afeef5 100644
--- a/xen/drivers/passthrough/pci.c
+++ b/xen/drivers/passthrough/pci.c
@@ -329,6 +329,8 @@ static struct pci_dev *alloc_pdev(struct pci_seg *pseg, u8 
bus, u8 devfn)
     *((u8*) &pdev->devfn) = devfn;
     pdev->domain = NULL;
 
+    arch_pci_init_pdev(pdev);
+
     rc = pdev_msi_init(pdev);
     if ( rc )
     {
diff --git a/xen/include/asm-arm/pci.h b/xen/include/asm-arm/pci.h
index e6d4000e2ac8..ea87ec6006fc 100644
--- a/xen/include/asm-arm/pci.h
+++ b/xen/include/asm-arm/pci.h
@@ -105,6 +105,9 @@ static always_inline bool is_pci_passthrough_enabled(void)
 {
     return pci_passthrough_enabled;
 }
+
+void arch_pci_init_pdev(struct pci_dev *pdev);
+
 #else   /*!CONFIG_HAS_PCI*/
 
 struct arch_pci_dev { };
@@ -121,5 +124,9 @@ static inline int pci_get_host_bridge_segment(const struct 
dt_device_node *node,
     return -EINVAL;
 }
 
+struct pci_dev;
+
+static inline void arch_pci_init_pdev(struct pci_dev *pdev) {}
+
 #endif  /*!CONFIG_HAS_PCI*/
 #endif /* __ARM_PCI_H__ */
diff --git a/xen/include/asm-x86/pci.h b/xen/include/asm-x86/pci.h
index c4a4fdcbc239..443f25347d08 100644
--- a/xen/include/asm-x86/pci.h
+++ b/xen/include/asm-x86/pci.h
@@ -36,4 +36,6 @@ static always_inline bool is_pci_passthrough_enabled(void)
     return true;
 }
 
+static inline void arch_pci_init_pdev(struct pci_dev *pdev) {}
+
 #endif /* __X86_PCI_H__ */
-- 
2.25.1