[Xen-devel] [PATCH 3/3] ioemu: remove power state transition and xc_deassign_device().

[Yuji Shimada <shimada-yxb@xxxxxxxxxxxxxxx>]

This patch adds two changes to ioemu.
  - Modify ioemu not to call xc_deassign_device()
  - Remove power state transition of real device when ioemu initialise
    PMCSR.

Thanks,
--
Yuji Shimada


Signed-off-by: Yuji Shimada <shimada-yxb@xxxxxxxxxxxxxxx>

diff --git a/hw/pass-through.c b/hw/pass-through.c
index 710acbf..65e7634 100644
--- a/hw/pass-through.c
+++ b/hw/pass-through.c
@@ -2465,29 +2465,6 @@ static uint32_t pt_pmcsr_reg_init(struct pt_dev *ptdev,
         ptdev->pm_state->no_soft_reset = (*(uint8_t *)(d->config + real_offset)
             & (uint8_t)PCI_PM_CTRL_NO_SOFT_RESET);
 
-    /* wake up real physical device */
-    switch ( pci_read_word(ptdev->pci_dev, real_offset) 
-             & PCI_PM_CTRL_STATE_MASK )
-    {
-    case 0:
-        break;
-    case 1:
-        PT_LOG("Power state transition D1 -> D0active\n");
-        pci_write_word(ptdev->pci_dev, real_offset, 0);
-        break;
-    case 2:
-        PT_LOG("Power state transition D2 -> D0active\n");
-        pci_write_word(ptdev->pci_dev, real_offset, 0);
-        usleep(200);
-        break;
-    case 3:
-        PT_LOG("Power state transition D3hot -> D0active\n");
-        pci_write_word(ptdev->pci_dev, real_offset, 0);
-        usleep(10 * 1000);
-        pt_init_pci_config(ptdev);
-        break;
-    }
-
     return reg->init_val;
 }
 
@@ -3963,13 +3940,6 @@ static int unregister_real_device(int slot)
     /* unregister real device's MMIO/PIO BARs */
     pt_unregister_regions(assigned_device);
 
-    /* deassign the dev to dom0 */
-    bdf |= (pci_dev->bus  & 0xff) << 16;
-    bdf |= (pci_dev->dev  & 0x1f) << 11;
-    bdf |= (pci_dev->func & 0x1f) << 8;
-    if ( (rc = xc_deassign_device(xc_handle, domid, bdf)) != 0)
-        PT_LOG("Error: Revoking the device failed! rc=%d\n", rc);
-
     /* mark this slot as free */
     php_dev->valid = 0;
     php_dev->pt_dev = NULL;


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