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Diffstat (limited to 'arch/x86/pci/xen.c')
-rw-r--r--arch/x86/pci/xen.c129
1 files changed, 28 insertions, 101 deletions
diff --git a/arch/x86/pci/xen.c b/arch/x86/pci/xen.c
index 3d41a09c2c14..b94f727251b6 100644
--- a/arch/x86/pci/xen.c
+++ b/arch/x86/pci/xen.c
@@ -23,6 +23,7 @@
#include <xen/features.h>
#include <xen/events.h>
+#include <xen/pci.h>
#include <asm/xen/pci.h>
#include <asm/xen/cpuid.h>
#include <asm/apic.h>
@@ -113,7 +114,7 @@ static int acpi_register_gsi_xen_hvm(struct device *dev, u32 gsi,
false /* no mapping of GSI to PIRQ */);
}
-#ifdef CONFIG_XEN_DOM0
+#ifdef CONFIG_XEN_PV_DOM0
static int xen_register_gsi(u32 gsi, int triggering, int polarity)
{
int rc, irq;
@@ -183,7 +184,7 @@ static int xen_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
if (ret)
goto error;
i = 0;
- for_each_pci_msi_entry(msidesc, dev) {
+ msi_for_each_desc(msidesc, &dev->dev, MSI_DESC_NOTASSOCIATED) {
irq = xen_bind_pirq_msi_to_irq(dev, msidesc, v[i],
(type == PCI_CAP_ID_MSI) ? nvec : 1,
(type == PCI_CAP_ID_MSIX) ?
@@ -234,7 +235,7 @@ static int xen_hvm_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
if (type == PCI_CAP_ID_MSI && nvec > 1)
return 1;
- for_each_pci_msi_entry(msidesc, dev) {
+ msi_for_each_desc(msidesc, &dev->dev, MSI_DESC_NOTASSOCIATED) {
pirq = xen_allocate_pirq_msi(dev, msidesc);
if (pirq < 0) {
irq = -ENODEV;
@@ -261,7 +262,7 @@ error:
return irq;
}
-#ifdef CONFIG_XEN_DOM0
+#ifdef CONFIG_XEN_PV_DOM0
static bool __read_mostly pci_seg_supported = true;
static int xen_initdom_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
@@ -269,7 +270,7 @@ static int xen_initdom_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
int ret = 0;
struct msi_desc *msidesc;
- for_each_pci_msi_entry(msidesc, dev) {
+ msi_for_each_desc(msidesc, &dev->dev, MSI_DESC_NOTASSOCIATED) {
struct physdev_map_pirq map_irq;
domid_t domid;
@@ -305,7 +306,7 @@ static int xen_initdom_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
return -EINVAL;
map_irq.table_base = pci_resource_start(dev, bir);
- map_irq.entry_nr = msidesc->msi_attrib.entry_nr;
+ map_irq.entry_nr = msidesc->msi_index;
}
ret = -EINVAL;
@@ -350,10 +351,13 @@ out:
return ret;
}
-static void xen_initdom_restore_msi_irqs(struct pci_dev *dev)
+bool xen_initdom_restore_msi(struct pci_dev *dev)
{
int ret = 0;
+ if (!xen_initial_domain())
+ return true;
+
if (pci_seg_supported) {
struct physdev_pci_device restore_ext;
@@ -374,30 +378,26 @@ static void xen_initdom_restore_msi_irqs(struct pci_dev *dev)
ret = HYPERVISOR_physdev_op(PHYSDEVOP_restore_msi, &restore);
WARN(ret && ret != -ENOSYS, "restore_msi -> %d\n", ret);
}
+ return false;
}
-#else /* CONFIG_XEN_DOM0 */
+#else /* CONFIG_XEN_PV_DOM0 */
#define xen_initdom_setup_msi_irqs NULL
-#define xen_initdom_restore_msi_irqs NULL
-#endif /* !CONFIG_XEN_DOM0 */
+#endif /* !CONFIG_XEN_PV_DOM0 */
static void xen_teardown_msi_irqs(struct pci_dev *dev)
{
struct msi_desc *msidesc;
int i;
- for_each_pci_msi_entry(msidesc, dev) {
- if (msidesc->irq) {
- for (i = 0; i < msidesc->nvec_used; i++)
- xen_destroy_irq(msidesc->irq + i);
- }
+ msi_for_each_desc(msidesc, &dev->dev, MSI_DESC_ASSOCIATED) {
+ for (i = 0; i < msidesc->nvec_used; i++)
+ xen_destroy_irq(msidesc->irq + i);
}
}
static void xen_pv_teardown_msi_irqs(struct pci_dev *dev)
{
- struct msi_desc *msidesc = first_pci_msi_entry(dev);
-
- if (msidesc->msi_attrib.is_msix)
+ if (dev->msix_enabled)
xen_pci_frontend_disable_msix(dev);
else
xen_pci_frontend_disable_msi(dev);
@@ -413,10 +413,7 @@ static int xen_msi_domain_alloc_irqs(struct irq_domain *domain,
if (WARN_ON_ONCE(!dev_is_pci(dev)))
return -EINVAL;
- if (first_msi_entry(dev)->msi_attrib.is_msix)
- type = PCI_CAP_ID_MSIX;
- else
- type = PCI_CAP_ID_MSI;
+ type = to_pci_dev(dev)->msix_enabled ? PCI_CAP_ID_MSIX : PCI_CAP_ID_MSI;
return xen_msi_ops.setup_msi_irqs(to_pci_dev(dev), nvec, type);
}
@@ -465,14 +462,11 @@ static __init struct irq_domain *xen_create_pci_msi_domain(void)
static __init void xen_setup_pci_msi(void)
{
if (xen_pv_domain()) {
- if (xen_initial_domain()) {
+ if (xen_initial_domain())
xen_msi_ops.setup_msi_irqs = xen_initdom_setup_msi_irqs;
- x86_msi.restore_msi_irqs = xen_initdom_restore_msi_irqs;
- } else {
+ else
xen_msi_ops.setup_msi_irqs = xen_setup_msi_irqs;
- }
xen_msi_ops.teardown_msi_irqs = xen_pv_teardown_msi_irqs;
- pci_msi_ignore_mask = 1;
} else if (xen_hvm_domain()) {
xen_msi_ops.setup_msi_irqs = xen_hvm_setup_msi_irqs;
xen_msi_ops.teardown_msi_irqs = xen_teardown_msi_irqs;
@@ -486,6 +480,11 @@ static __init void xen_setup_pci_msi(void)
* in allocating the native domain and never use it.
*/
x86_init.irqs.create_pci_msi_domain = xen_create_pci_msi_domain;
+ /*
+ * With XEN PIRQ/Eventchannels in use PCI/MSI[-X] masking is solely
+ * controlled by the hypervisor.
+ */
+ pci_msi_ignore_mask = 1;
}
#else /* CONFIG_PCI_MSI */
@@ -555,7 +554,7 @@ int __init pci_xen_hvm_init(void)
return 0;
}
-#ifdef CONFIG_XEN_DOM0
+#ifdef CONFIG_XEN_PV_DOM0
int __init pci_xen_initial_domain(void)
{
int irq;
@@ -583,77 +582,5 @@ int __init pci_xen_initial_domain(void)
}
return 0;
}
-
-struct xen_device_domain_owner {
- domid_t domain;
- struct pci_dev *dev;
- struct list_head list;
-};
-
-static DEFINE_SPINLOCK(dev_domain_list_spinlock);
-static struct list_head dev_domain_list = LIST_HEAD_INIT(dev_domain_list);
-
-static struct xen_device_domain_owner *find_device(struct pci_dev *dev)
-{
- struct xen_device_domain_owner *owner;
-
- list_for_each_entry(owner, &dev_domain_list, list) {
- if (owner->dev == dev)
- return owner;
- }
- return NULL;
-}
-
-int xen_find_device_domain_owner(struct pci_dev *dev)
-{
- struct xen_device_domain_owner *owner;
- int domain = -ENODEV;
-
- spin_lock(&dev_domain_list_spinlock);
- owner = find_device(dev);
- if (owner)
- domain = owner->domain;
- spin_unlock(&dev_domain_list_spinlock);
- return domain;
-}
-EXPORT_SYMBOL_GPL(xen_find_device_domain_owner);
-
-int xen_register_device_domain_owner(struct pci_dev *dev, uint16_t domain)
-{
- struct xen_device_domain_owner *owner;
-
- owner = kzalloc(sizeof(struct xen_device_domain_owner), GFP_KERNEL);
- if (!owner)
- return -ENODEV;
-
- spin_lock(&dev_domain_list_spinlock);
- if (find_device(dev)) {
- spin_unlock(&dev_domain_list_spinlock);
- kfree(owner);
- return -EEXIST;
- }
- owner->domain = domain;
- owner->dev = dev;
- list_add_tail(&owner->list, &dev_domain_list);
- spin_unlock(&dev_domain_list_spinlock);
- return 0;
-}
-EXPORT_SYMBOL_GPL(xen_register_device_domain_owner);
-
-int xen_unregister_device_domain_owner(struct pci_dev *dev)
-{
- struct xen_device_domain_owner *owner;
-
- spin_lock(&dev_domain_list_spinlock);
- owner = find_device(dev);
- if (!owner) {
- spin_unlock(&dev_domain_list_spinlock);
- return -ENODEV;
- }
- list_del(&owner->list);
- spin_unlock(&dev_domain_list_spinlock);
- kfree(owner);
- return 0;
-}
-EXPORT_SYMBOL_GPL(xen_unregister_device_domain_owner);
#endif
+
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-19 14:42:39 +0000