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DM: unmap ptdev BAR when deinit

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Unmap ptdev BAR when deinit to comply with native system, who zap out
all pre-allocated BARs.

Tracked-On: #1146

Signed-off-by: Edwin Zhai <edwin.zhai@intel.com>
Acked-by: Yin Fengwei <fengwei.yin@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
This commit is contained in:
Edwin Zhai
2018-08-29 14:42:35 +08:00
committed by lijinxia
parent 1b334ec08f
commit 30b77aba5d
4 changed files with 36 additions and 1 deletions
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18
devicemodel/hw/pci/passthrough.c
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@@ -672,6 +672,7 @@ init_msix_table(struct vmctx *ctx, struct passthru_dev *ptdev, uint64_t base)
/* Map everything before the MSI-X table */
if (table_offset > 0) {
len = table_offset;
warnx("Map part of MSI-X BAR!\n");
error = vm_map_ptdev_mmio(ctx, b, s, f, start, len, base);
if (error)
return error;
@@ -703,6 +704,7 @@ init_msix_table(struct vmctx *ctx, struct passthru_dev *ptdev, uint64_t base)
/* Map everything beyond the end of the MSI-X table */
if (remaining > 0) {
len = remaining;
warnx("Map remaining of MSI-X BAR!\n");
error = vm_map_ptdev_mmio(ctx, b, s, f, start, len, base);
if (error)
return error;
@@ -1064,7 +1066,7 @@ passthru_deinit(struct vmctx *ctx, struct pci_vdev *dev, char *opts)
struct passthru_dev *ptdev;
uint8_t bus, slot, func;
uint16_t virt_bdf = PCI_BDF(dev->bus, dev->slot, dev->func);
int vector_cnt = 0;
int i, vector_cnt = 0;
if (!dev->arg) {
warnx("%s: passthru_dev is NULL", __func__);
@@ -1095,6 +1097,20 @@ passthru_deinit(struct vmctx *ctx, struct pci_vdev *dev, char *opts)
free(dev->msix.table);
}
/* unmap the physical BAR in guest MMIO space */
for (i = 0; i <= PCI_BARMAX; i++) {
if (ptdev->bar[i].size == 0 ||
i == pci_msix_table_bar(dev) ||
ptdev->bar[i].type == PCIBAR_IO)
continue;
vm_unmap_ptdev_mmio(ctx, ptdev->sel.bus,
ptdev->sel.dev, ptdev->sel.func,
dev->bar[i].addr, ptdev->bar[i].size,
ptdev->bar[i].addr);
}
free(ptdev);
vm_unassign_ptdev(ctx, bus, slot, func);
}