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s390x/pci: introduce S390PCIBusDevice.iommu_enabled 

We introduce iommu_enabled field for S390PCIBusDevice struct to
track whether the iommu has been enabled for the device. This allows
us to stop temporarily changing ->configured while en/disabling the
iommu and to do conditional cleanup later.

Signed-off-by: Yi Min Zhao <zyimin@linux.vnet.ibm.com>
Reviewed-by: Pierre Morel <pmorel@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
This commit is contained in:
Yi Min Zhao 2016-05-04 15:07:11 +08:00 committed by Cornelia Huck
parent e141dbadfa
commit df6a050c82
2 changed files with 5 additions and 5 deletions
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9
hw/s390x/s390-pci-bus.c
View File

@ -340,7 +340,8 @@ static IOMMUTLBEntry s390_translate_iommu(MemoryRegion *iommu, hwaddr addr,
.perm = IOMMU_NONE,
};
if (!pbdev->configured || !pbdev->pdev || !(pbdev->fh & FH_ENABLED)) {
if (!pbdev->configured || !pbdev->pdev ||
!(pbdev->fh & FH_ENABLED) || !pbdev->iommu_enabled) {
return ret;
}
@ -480,21 +481,19 @@ static const MemoryRegionOps s390_msi_ctrl_ops = {
void s390_pci_iommu_enable(S390PCIBusDevice *pbdev)
{
pbdev->configured = false;
uint64_t size = pbdev->pal - pbdev->pba + 1;
memory_region_init_iommu(&pbdev->iommu_mr, OBJECT(&pbdev->mr),
&s390_iommu_ops, "iommu-s390", size);
memory_region_add_subregion(&pbdev->mr, pbdev->pba, &pbdev->iommu_mr);
pbdev->configured = true;
pbdev->iommu_enabled = true;
}
void s390_pci_iommu_disable(S390PCIBusDevice *pbdev)
{
pbdev->configured = false;
memory_region_del_subregion(&pbdev->mr, &pbdev->iommu_mr);
object_unparent(OBJECT(&pbdev->iommu_mr));
pbdev->configured = true;
pbdev->iommu_enabled = false;
}
static void s390_pcihost_init_as(S390pciState *s)

1
hw/s390x/s390-pci-bus.h
View File

@ -219,6 +219,7 @@ typedef struct S390PCIBusDevice {
bool configured;
bool error_state;
bool lgstg_blocked;
bool iommu_enabled;
uint32_t fh;
uint32_t fid;
uint64_t g_iota;