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hw/pci: Introduce pci_requester_id() 

For GICv3 ITS implementation we are going to use requester IDs in KVM IRQ
routing code. This patch introduces reusable convenient way to obtain this
ID from the device pointer. The new function is now used in some places,
where the same calculation was used.

MemTxAttrs.stream_id also renamed to requester_id in order to better
reflect semantics of the field.

Signed-off-by: Pavel Fedin <p.fedin@samsung.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Message-Id: <5814bcb03a297f198e796b13ed9c35059c52f89b.1444916432.git.p.fedin@samsung.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Pavel Fedin 2015-10-15 16:44:51 +03:00 committed by Paolo Bonzini
parent 50bf31b937
commit a05f686ff3
5 changed files with 10 additions and 5 deletions
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2
hw/i386/kvm/pci-assign.c
View File

@ -1483,7 +1483,7 @@ static int assigned_device_pci_cap_init(PCIDevice *pci_dev, Error **errp)
* error bits, leave the rest. */
status = pci_get_long(pci_dev->config + pos + PCI_X_STATUS);
status &= ~(PCI_X_STATUS_BUS | PCI_X_STATUS_DEVFN);
status |= (pci_bus_num(pci_dev->bus) << 8) | pci_dev->devfn;
status |= pci_requester_id(pci_dev);
status &= ~(PCI_X_STATUS_SPL_DISC | PCI_X_STATUS_UNX_SPL |
PCI_X_STATUS_SPL_ERR);
pci_set_long(pci_dev->config + pos + PCI_X_STATUS, status);

2
hw/pci/msi.c
View File

@ -294,7 +294,7 @@ void msi_send_message(PCIDevice *dev, MSIMessage msg)
{
MemTxAttrs attrs = {};
attrs.stream_id = (pci_bus_num(dev->bus) << 8) | dev->devfn;
attrs.requester_id = pci_requester_id(dev);
address_space_stl_le(&dev->bus_master_as, msg.address, msg.data,
attrs, NULL);
}

2
hw/pci/pcie_aer.c
View File

@ -979,7 +979,7 @@ static int do_pcie_aer_inject_error(Monitor *mon,
}
}
err.status = error_status;
err.source_id = (pci_bus_num(dev->bus) << 8) | dev->devfn;
err.source_id = pci_requester_id(dev);
err.flags = 0;
if (correctable) {

4
include/exec/memattrs.h
View File

@ -35,8 +35,8 @@ typedef struct MemTxAttrs {
unsigned int secure:1;
/* Memory access is usermode (unprivileged) */
unsigned int user:1;
/* Stream ID (for MSI for example) */
unsigned int stream_id:16;
/* Requester ID (for MSI for example) */
unsigned int requester_id:16;
} MemTxAttrs;
/* Bus masters which don't specify any attributes will get this,

5
include/hw/pci/pci.h
View File

@ -677,6 +677,11 @@ static inline uint32_t pci_config_size(const PCIDevice *d)
return pci_is_express(d) ? PCIE_CONFIG_SPACE_SIZE : PCI_CONFIG_SPACE_SIZE;
}
static inline uint16_t pci_requester_id(PCIDevice *dev)
{
return (pci_bus_num(dev->bus) << 8) | dev->devfn;
}
/* DMA access functions */
static inline AddressSpace *pci_get_address_space(PCIDevice *dev)
{