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dm: pci: update MMIO EPT mapping when update BAR address

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For PCI passthrough device when guest OS updates the BAR address
the corresponding EPT mapping should be updated as well.

Tracked-On: #2962
Signed-off-by: Jian Jun Chen <jian.jun.chen@intel.com>
Signed-off-by: Liu Shuo A <shuo.a.liu@intel.com>
Reviewed-by: Binbin Wu <binbin.wu@intel.com>
Acked-by: Yin Fengwei <fengwei.yin@intel.com>
This commit is contained in:
Jian Jun Chen
2019-05-22 13:41:36 +08:00
committed by wenlingz
parent cee2f8b288
commit 811d1fe93d
3 changed files with 50 additions and 5 deletions
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34
devicemodel/hw/pci/passthrough.c
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@@ -938,6 +938,39 @@ passthru_deinit(struct vmctx *ctx, struct pci_vdev *dev, char *opts)
vm_unassign_ptdev(ctx, bus, slot, func);
}
static void
passthru_update_bar_map(struct vmctx *ctx, struct pci_vdev *dev,
int idx, uint64_t orig_addr)
{
struct passthru_dev *ptdev;
if (!dev->arg) {
warnx("%s: passthru_dev is NULL", __func__);
return;
}
ptdev = (struct passthru_dev *)dev->arg;
if (ptdev->bar[idx].size == 0 ||
idx == ptdev_msix_table_bar(ptdev) ||
ptdev->bar[idx].type == PCIBAR_IO)
return;
if (dev->bar[idx].addr + dev->bar[idx].size > PCI_EMUL_MEMLIMIT64 ||
orig_addr + dev->bar[idx].size > PCI_EMUL_MEMLIMIT64)
return;
vm_unmap_ptdev_mmio(ctx, ptdev->sel.bus,
ptdev->sel.dev, ptdev->sel.func,
orig_addr, ptdev->bar[idx].size,
ptdev->bar[idx].addr);
vm_map_ptdev_mmio(ctx, ptdev->sel.bus,
ptdev->sel.dev, ptdev->sel.func,
dev->bar[idx].addr, ptdev->bar[idx].size,
ptdev->bar[idx].addr);
}
/* bind pin info for pass-through device */
static void
passthru_bind_irq(struct vmctx *ctx, struct pci_vdev *dev)
@@ -1767,6 +1800,7 @@ struct pci_vdev_ops passthru = {
.vdev_barwrite = passthru_write,
.vdev_barread = passthru_read,
.vdev_phys_access = passthru_bind_irq,
.vdev_update_bar_map = passthru_update_bar_map,
.vdev_write_dsdt = passthru_write_dsdt,
};
DEFINE_PCI_DEVTYPE(passthru);