Commit-ID: 0e575ab84e068f05e0ca2286968b749f2b9d69c2
Gitweb: http://git.kernel.org/tip/0e575ab84e068f05e0ca2286968b749f2b9d69c2
Author: Sasha Levin <levinsasha928@xxxxxxxxx>
AuthorDate: Sat, 10 Dec 2011 22:40:43 +0200
Committer: Pekka Enberg <penberg@xxxxxxxxxx>
CommitDate: Sun, 11 Dec 2011 10:16:44 +0200
kvm tools: Free up the MSI-X PBA BAR
Free up the BAR to make space for the new virtio BARs. It isn't required
to have the PBA and the table in the separate BARs, and uniting them will
just give us extra BARs to play with.
Signed-off-by: Sasha Levin <levinsasha928@xxxxxxxxx>
Signed-off-by: Pekka Enberg <penberg@xxxxxxxxxx>
---
tools/kvm/include/kvm/virtio-pci.h | 1 -
tools/kvm/virtio/pci.c | 35 +++++++++++++++--------------------
2 files changed, 15 insertions(+), 21 deletions(-)
diff --git a/tools/kvm/include/kvm/virtio-pci.h b/tools/kvm/include/kvm/virtio-pci.h
index 2bbb271..73f7486 100644
--- a/tools/kvm/include/kvm/virtio-pci.h
+++ b/tools/kvm/include/kvm/virtio-pci.h
@@ -30,7 +30,6 @@ struct virtio_pci {
u32 vq_vector[VIRTIO_PCI_MAX_VQ];
u32 gsis[VIRTIO_PCI_MAX_VQ];
u32 msix_io_block;
- u32 msix_pba_block;
u64 msix_pba;
struct msix_table msix_table[VIRTIO_PCI_MAX_VQ + VIRTIO_PCI_MAX_CONFIG];
diff --git a/tools/kvm/virtio/pci.c b/tools/kvm/virtio/pci.c
index e2159d9..a7da8e8 100644
--- a/tools/kvm/virtio/pci.c
+++ b/tools/kvm/virtio/pci.c
@@ -220,23 +220,21 @@ static struct ioport_operations virtio_pci__io_ops = {
static void callback_mmio_table(u64 addr, u8 *data, u32 len, u8 is_write, void *ptr)
{
struct virtio_pci *vpci = ptr;
- void *table = &vpci->msix_table;
+ void *table;
+ u32 offset;
- if (is_write)
- memcpy(table + addr - vpci->msix_io_block, data, len);
- else
- memcpy(data, table + addr - vpci->msix_io_block, len);
-}
-
-static void callback_mmio_pba(u64 addr, u8 *data, u32 len, u8 is_write, void *ptr)
-{
- struct virtio_pci *vpci = ptr;
- void *pba = &vpci->msix_pba;
+ if (addr > vpci->msix_io_block + PCI_IO_SIZE) {
+ table = &vpci->msix_pba;
+ offset = vpci->msix_io_block + PCI_IO_SIZE;
+ } else {
+ table = &vpci->msix_table;
+ offset = vpci->msix_io_block;
+ }
if (is_write)
- memcpy(pba + addr - vpci->msix_pba_block, data, len);
+ memcpy(table + addr - offset, data, len);
else
- memcpy(data, pba + addr - vpci->msix_pba_block, len);
+ memcpy(data, table + addr - offset, len);
}
int virtio_pci__signal_vq(struct kvm *kvm, struct virtio_trans *vtrans, u32 vq)
@@ -289,12 +287,10 @@ int virtio_pci__init(struct kvm *kvm, struct virtio_trans *vtrans, void *dev,
u8 pin, line, ndev;
vpci->dev = dev;
- vpci->msix_io_block = pci_get_io_space_block(PCI_IO_SIZE);
- vpci->msix_pba_block = pci_get_io_space_block(PCI_IO_SIZE);
+ vpci->msix_io_block = pci_get_io_space_block(PCI_IO_SIZE * 2);
vpci->base_addr = ioport__register(IOPORT_EMPTY, &virtio_pci__io_ops, IOPORT_SIZE, vtrans);
kvm__register_mmio(kvm, vpci->msix_io_block, PCI_IO_SIZE, callback_mmio_table, vpci);
- kvm__register_mmio(kvm, vpci->msix_pba_block, PCI_IO_SIZE, callback_mmio_pba, vpci);
vpci->pci_hdr = (struct pci_device_header) {
.vendor_id = cpu_to_le16(PCI_VENDOR_ID_REDHAT_QUMRANET),
@@ -306,11 +302,10 @@ int virtio_pci__init(struct kvm *kvm, struct virtio_trans *vtrans, void *dev,
.class[2] = (class >> 16) & 0xff,
.subsys_vendor_id = cpu_to_le16(PCI_SUBSYSTEM_VENDOR_ID_REDHAT_QUMRANET),
.subsys_id = cpu_to_le16(subsys_id),
- .bar[0] = cpu_to_le32(vpci->base_addr | PCI_BASE_ADDRESS_SPACE_IO),
+ .bar[0] = cpu_to_le32(vpci->base_addr
+ | PCI_BASE_ADDRESS_SPACE_IO),
.bar[1] = cpu_to_le32(vpci->msix_io_block
| PCI_BASE_ADDRESS_SPACE_MEMORY),
- .bar[3] = cpu_to_le32(vpci->msix_pba_block
- | PCI_BASE_ADDRESS_SPACE_MEMORY),
.status = cpu_to_le16(PCI_STATUS_CAP_LIST),
.capabilities = (void *)&vpci->pci_hdr.msix - (void *)&vpci->pci_hdr,
.bar_size[0] = IOPORT_SIZE,
@@ -338,7 +333,7 @@ int virtio_pci__init(struct kvm *kvm, struct virtio_trans *vtrans, void *dev,
* we're not in short of BARs
*/
vpci->pci_hdr.msix.table_offset = cpu_to_le32(1); /* Use BAR 1 */
- vpci->pci_hdr.msix.pba_offset = cpu_to_le32(3); /* Use BAR 3 */
+ vpci->pci_hdr.msix.pba_offset = cpu_to_le32(1 | PCI_IO_SIZE); /* Use BAR 3 */
vpci->config_vector = 0;
if (irq__register_device(subsys_id, &ndev, &pin, &line) < 0)
--
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