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qemu: Add a check for slot and base dimm address conflicts

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When hotplugging a memory device, there wasn't a check to determine
if there is a conflict with the address space being used by the to
be added memory device and any existing device which is disallowed by qemu.

This patch adds a check to ensure the new device address doesn't
conflict with any existing device.

Signed-off-by: Luyao Huang <lhuang@redhat.com>
This commit is contained in:
Luyao Huang 2015-06-15 20:33:49 +08:00 committed by John Ferlan
parent d7d910d98d
commit cb7e13ffbf
1 changed files with 37 additions and 0 deletions
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37
src/qemu/qemu_command.c
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@ -4957,6 +4957,40 @@ qemuBuildMemoryDimmBackendStr(virDomainMemoryDefPtr mem,
}
static bool
qemuCheckMemoryDimmConflict(virDomainDefPtr def,
virDomainMemoryDefPtr mem)
{
size_t i;
for (i = 0; i < def->nmems; i++) {
virDomainMemoryDefPtr tmp = def->mems[i];
if (tmp == mem ||
tmp->info.type != VIR_DOMAIN_DEVICE_ADDRESS_TYPE_DIMM)
continue;
if (mem->info.addr.dimm.slot == tmp->info.addr.dimm.slot) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("memory device slot '%u' is already being "
"used by another memory device"),
mem->info.addr.dimm.slot);
return true;
}
if (mem->info.addr.dimm.base != 0 &&
mem->info.addr.dimm.base == tmp->info.addr.dimm.base) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("memory device base '0x%llx' is already being "
"used by another memory device"),
mem->info.addr.dimm.base);
return true;
}
}
return false;
}
char *
qemuBuildMemoryDeviceStr(virDomainMemoryDefPtr mem,
virDomainDefPtr def,
@ -4998,6 +5032,9 @@ qemuBuildMemoryDeviceStr(virDomainMemoryDefPtr mem,
mem->targetNode, mem->info.alias, mem->info.alias);
if (mem->info.type == VIR_DOMAIN_DEVICE_ADDRESS_TYPE_DIMM) {
if (qemuCheckMemoryDimmConflict(def, mem))
return NULL;
virBufferAsprintf(&buf, ",slot=%d", mem->info.addr.dimm.slot);
virBufferAsprintf(&buf, ",addr=%llu", mem->info.addr.dimm.base);
}