From: Frank Blaschka <frank.blasc...@de.ibm.com>
Following changes are made because of platform differences:
1) s390 does not support mmap'ing of PCI BARs so we have to go via slow path
2) no intx support
3) no classic MSIX interrupts. The pci hw understands the concept
of requesting MSIX irqs but irqs are delivered as s390 adapter irqs.
Introduce s390 specific functions for msix notification (slow path) and
msi routes (kvm fast path).
4) Use type1 iommu but register only for iommu address space
Signed-off-by: Frank Blaschka <frank.blasc...@de.ibm.com>
---
hw/misc/vfio.c | 24 ++++++++++++++++++++++++
1 file changed, 24 insertions(+)
--- a/hw/misc/vfio.c
+++ b/hw/misc/vfio.c
@@ -40,6 +40,9 @@
#include "sysemu/kvm.h"
#include "sysemu/sysemu.h"
#include "hw/misc/vfio.h"
+#ifdef TARGET_S390X
+#include "hw/s390x/s390-pci-bus.h"
+#endif
/* #define DEBUG_VFIO */
#ifdef DEBUG_VFIO
@@ -51,7 +54,11 @@
#endif
/* Extra debugging, trap acceleration paths for more logging */
+#ifdef TARGET_S390X
+#define VFIO_ALLOW_MMAP 0
+#else
#define VFIO_ALLOW_MMAP 1
+#endif
#define VFIO_ALLOW_KVM_INTX 1
#define VFIO_ALLOW_KVM_MSI 1
#define VFIO_ALLOW_KVM_MSIX 1
@@ -554,6 +561,10 @@ static int vfio_enable_intx(VFIODevice *
struct vfio_irq_set *irq_set;
int32_t *pfd;
+#ifdef TARGET_S390X
+ return 0;
+#endif
+
if (!pin) {
return 0;
}
@@ -664,7 +675,11 @@ static void vfio_msi_interrupt(void *opa
#endif
if (vdev->interrupt == VFIO_INT_MSIX) {
+#ifdef TARGET_S390X
+ s390_msix_notify(&vdev->pdev, nr);
+#else
msix_notify(&vdev->pdev, nr);
+#endif
} else if (vdev->interrupt == VFIO_INT_MSI) {
msi_notify(&vdev->pdev, nr);
} else {
@@ -730,7 +745,11 @@ static void vfio_add_kvm_msi_virq(VFIOMS
return;
}
+#ifdef TARGET_S390X
+ virq = s390_irqchip_add_msi_route(&vector->vdev->pdev, kvm_state, *msg);
+#else
virq = kvm_irqchip_add_msi_route(kvm_state, *msg);
+#endif
if (virq < 0) {
event_notifier_cleanup(&vector->kvm_interrupt);
return;
@@ -3702,8 +3721,13 @@ static int vfio_connect_container(VFIOGr
container->iommu_data.type1.listener = vfio_memory_listener;
container->iommu_data.release = vfio_listener_release;
+#ifdef TARGET_S390X
+ memory_listener_register(&container->iommu_data.type1.listener,
+ container->space->as);
+#else
memory_listener_register(&container->iommu_data.type1.listener,
&address_space_memory);
+#endif
if (container->iommu_data.type1.error) {
ret = container->iommu_data.type1.error;
