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Re: [libvirt] [PATCH v2 2/8] Release address in function granularity than slot



Since you have to unplug all the functions in a slot at the same time anyway, I don't see the point in reverting this commit - you'll just end up needing to call it multiple times - once for each function that was in the slot.

(just guessing without looking at the code - perhaps it's already being called from within lower level functions for each device, and each device gets its own notification from qemu that it's been detached? Or to ask a more specific question - exactly what happens with device detach? Do you send qemu a single detach command and it detaches all the functions as a single unit? Or do you send it multiple detach commands, with function 0 being the last?)


On 05/18/2016 05:30 PM, Shivaprasad G Bhat wrote:
The commit 6fe678c is reverted. The code is moved around and cant revert
staright.

Signed-off-by: Shivaprasad G Bhat <sbhat linux vnet ibm com>
---
  src/conf/domain_addr.c         |   22 +++++++++-------------
  src/libvirt_private.syms       |    1 +
  src/qemu/qemu_domain_address.c |    2 +-
  3 files changed, 11 insertions(+), 14 deletions(-)

diff --git a/src/conf/domain_addr.c b/src/conf/domain_addr.c
index acd8ce6..35c7cd4 100644
--- a/src/conf/domain_addr.c
+++ b/src/conf/domain_addr.c
@@ -472,21 +472,17 @@ virDomainPCIAddressEnsureAddr(virDomainPCIAddressSetPtr addrs,
          goto cleanup;
if (dev->type == VIR_DOMAIN_DEVICE_ADDRESS_TYPE_PCI) {
-        /* We do not support hotplug multi-function PCI device now, so we should
-         * reserve the whole slot. The function of the PCI device must be 0.
-         */
-        if (dev->addr.pci.function != 0) {
-            virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
-                           _("Only PCI device addresses with function=0"
-                             " are supported"));
-            goto cleanup;
-        }
+        if (((dev->addr.pci.function == 0) && (dev->addr.pci.multi == VIR_TRISTATE_SWITCH_ON)) ||
+            dev->addr.pci.function != 0) {
- if (!virDomainPCIAddressValidate(addrs, &dev->addr.pci,
-                                         addrStr, flags, true))
-            goto cleanup;
+            if (!virDomainPCIAddressValidate(addrs, &dev->addr.pci,
+                                             addrStr, flags, true))
+                goto cleanup;
- ret = virDomainPCIAddressReserveSlot(addrs, &dev->addr.pci, flags);
+            ret = virDomainPCIAddressReserveAddr(addrs, &dev->addr.pci, flags, false, true);
+        } else {
+            ret = virDomainPCIAddressReserveSlot(addrs, &dev->addr.pci, flags);
+        }
      } else {
          ret = virDomainPCIAddressReserveNextSlot(addrs, dev, flags);
      }
diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms
index fb24808..e4953b7 100644
--- a/src/libvirt_private.syms
+++ b/src/libvirt_private.syms
@@ -98,6 +98,7 @@ virDomainPCIAddressBusSetModel;
  virDomainPCIAddressEnsureAddr;
  virDomainPCIAddressFlagsCompatible;
  virDomainPCIAddressGetNextSlot;
+virDomainPCIAddressReleaseAddr;
  virDomainPCIAddressReleaseSlot;
  virDomainPCIAddressReserveAddr;
  virDomainPCIAddressReserveNextSlot;
diff --git a/src/qemu/qemu_domain_address.c b/src/qemu/qemu_domain_address.c
index 9c8c262..1e7d98c 100644
--- a/src/qemu/qemu_domain_address.c
+++ b/src/qemu/qemu_domain_address.c
@@ -1682,7 +1682,7 @@ qemuDomainReleaseDeviceAddress(virDomainObjPtr vm,
                   NULLSTR(devstr));
      else if (info->type == VIR_DOMAIN_DEVICE_ADDRESS_TYPE_PCI &&
               virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_DEVICE) &&
-             virDomainPCIAddressReleaseSlot(priv->pciaddrs,
+             virDomainPCIAddressReleaseAddr(priv->pciaddrs,
                                              &info->addr.pci) < 0)
          VIR_WARN("Unable to release PCI address on %s",
                   NULLSTR(devstr));

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