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s390x/pci: separate s390_pcihost_iommu_configure function 

Split s390_pcihost_iommu_configure() into separate functions for
configuring and deconfiguring in order to make the code more readable.

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 15:06:44 +08:00 committed by Cornelia Huck
parent 8f5cb69313
commit 715838881f
3 changed files with 16 additions and 13 deletions
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21
hw/s390x/s390-pci-bus.c
View File

@ -478,19 +478,22 @@ static const MemoryRegionOps s390_msi_ctrl_ops = {
.endianness = DEVICE_LITTLE_ENDIAN,
};
void s390_pcihost_iommu_configure(S390PCIBusDevice *pbdev, bool enable)
void s390_pci_iommu_enable(S390PCIBusDevice *pbdev)
{
pbdev->configured = false;
uint64_t size = pbdev->pal - pbdev->pba + 1;
if (enable) {
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);
} else {
memory_region_del_subregion(&pbdev->mr, &pbdev->iommu_mr);
}
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;
}
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;
}

3
hw/s390x/s390-pci-bus.h
View File

@ -249,7 +249,8 @@ int chsc_sei_nt2_get_event(void *res);
int chsc_sei_nt2_have_event(void);
void s390_pci_sclp_configure(SCCB *sccb);
void s390_pci_sclp_deconfigure(SCCB *sccb);
void s390_pcihost_iommu_configure(S390PCIBusDevice *pbdev, bool enable);
void s390_pci_iommu_enable(S390PCIBusDevice *pbdev);
void s390_pci_iommu_disable(S390PCIBusDevice *pbdev);
S390PCIBusDevice *s390_pci_find_dev_by_idx(uint32_t idx);
S390PCIBusDevice *s390_pci_find_dev_by_fh(uint32_t fh);
S390PCIBusDevice *s390_pci_find_dev_by_fid(uint32_t fid);

5
hw/s390x/s390-pci-inst.c
View File

@ -705,18 +705,17 @@ static int reg_ioat(CPUS390XState *env, S390PCIBusDevice *pbdev, ZpciFib fib)
pbdev->pal = pal;
pbdev->g_iota = g_iota;
s390_pcihost_iommu_configure(pbdev, true);
s390_pci_iommu_enable(pbdev);
return 0;
}
static void dereg_ioat(S390PCIBusDevice *pbdev)
{
s390_pci_iommu_disable(pbdev);
pbdev->pba = 0;
pbdev->pal = 0;
pbdev->g_iota = 0;
s390_pcihost_iommu_configure(pbdev, false);
}
int mpcifc_service_call(S390CPU *cpu, uint8_t r1, uint64_t fiba, uint8_t ar)