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[libvirt] [PATCH v3 1/3] Add NVRAM device



From: Li Zhang <zhlcindy linux vnet ibm com>

For pSeries guest in QEMU, NVRAM is one kind of spapr-vio device.
Users are allowed to specify spapr-vio devices'address.
But NVRAM is not supported in libvirt. So this patch is to
add NVRAM device to allow users to specify its address.

In QEMU, NVRAM device's address is specified by
 "-global spapr-nvram.reg=xxxxx".

In libvirt, XML file is defined as the following:

  <nvram>
    <address type='spapr-vio' reg='0x3000'/>
  </nvram>

Signed-off-by: Li Zhang <zhlcindy linux vnet ibm com>
---
 v3 -> v2:
  * Add NVRAM in domaincommon.rng and formatdomain.xml.in suggested by Daniel P.Berrange
  * Add NVRAM test cases suggested by Daniel P.Berrange
  * Remove nvram allocation when it is not specified suggested by Daniel P.Berrange
  * Add several error reports suggested by Daniel P.Berrange

 v2 -> v1:
  * Add NVRAM parameters parsing in qemuParseCommandLine

 src/conf/domain_conf.c  |   76 +++++++++++++++++++++++++++++++++++++++++++++++
 src/conf/domain_conf.h  |   10 +++++++
 src/qemu/qemu_command.c |   67 +++++++++++++++++++++++++++++++++++++++++
 src/qemu/qemu_command.h |    2 ++
 4 files changed, 155 insertions(+)

diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
index 3278e9c..c37487c 100644
--- a/src/conf/domain_conf.c
+++ b/src/conf/domain_conf.c
@@ -190,6 +190,7 @@ VIR_ENUM_IMPL(virDomainDevice, VIR_DOMAIN_DEVICE_LAST,
               "smartcard",
               "chr",
               "memballoon",
+              "nvram",
               "rng")
 
 VIR_ENUM_IMPL(virDomainDeviceAddress, VIR_DOMAIN_DEVICE_ADDRESS_TYPE_LAST,
@@ -1515,6 +1516,16 @@ void virDomainMemballoonDefFree(virDomainMemballoonDefPtr def)
     VIR_FREE(def);
 }
 
+void virDomainNVRAMDefFree(virDomainNVRAMDefPtr def)
+{
+    if (!def)
+        return;
+
+    virDomainDeviceInfoClear(&def->info);
+
+    VIR_FREE(def);
+}
+
 void virDomainWatchdogDefFree(virDomainWatchdogDefPtr def)
 {
     if (!def)
@@ -1678,6 +1689,7 @@ void virDomainDeviceDefFree(virDomainDeviceDefPtr def)
     case VIR_DOMAIN_DEVICE_SMARTCARD:
     case VIR_DOMAIN_DEVICE_CHR:
     case VIR_DOMAIN_DEVICE_MEMBALLOON:
+    case VIR_DOMAIN_DEVICE_NVRAM:
     case VIR_DOMAIN_DEVICE_LAST:
         break;
     }
@@ -1869,6 +1881,7 @@ void virDomainDefFree(virDomainDefPtr def)
     virDomainWatchdogDefFree(def->watchdog);
 
     virDomainMemballoonDefFree(def->memballoon);
+    virDomainNVRAMDefFree(def->nvram);
 
     for (i = 0; i < def->nseclabels; i++)
         virSecurityLabelDefFree(def->seclabels[i]);
@@ -2429,6 +2442,12 @@ int virDomainDeviceInfoIterate(virDomainDefPtr def,
         if (cb(def, &device, &def->rng->info, opaque) < 0)
             return -1;
     }
+    if (def->nvram) {
+        device.type = VIR_DOMAIN_DEVICE_NVRAM;
+        device.data.nvram = def->nvram;
+        if (cb(def, &device, &def->nvram->info, opaque) < 0)
+            return -1;
+    }
     device.type = VIR_DOMAIN_DEVICE_HUB;
     for (i = 0; i < def->nhubs ; i++) {
         device.data.hub = def->hubs[i];
@@ -2460,6 +2479,7 @@ int virDomainDeviceInfoIterate(virDomainDefPtr def,
     case VIR_DOMAIN_DEVICE_SMARTCARD:
     case VIR_DOMAIN_DEVICE_CHR:
     case VIR_DOMAIN_DEVICE_MEMBALLOON:
+    case VIR_DOMAIN_DEVICE_NVRAM:
     case VIR_DOMAIN_DEVICE_LAST:
     case VIR_DOMAIN_DEVICE_RNG:
         break;
@@ -7703,6 +7723,23 @@ error:
     goto cleanup;
 }
 
+static virDomainNVRAMDefPtr
+virDomainNVRAMDefParseXML(const xmlNodePtr node,
+                               unsigned int flags)
+{
+   virDomainNVRAMDefPtr def;
+
+    if (VIR_ALLOC(def) < 0) {
+        virReportOOMError();
+        return NULL;
+    }
+
+    if ( virDomainDeviceInfoParseXML(node, NULL, &def->info, flags) < 0 )
+        return NULL;
+
+    return def;
+}
+
 static virSysinfoDefPtr
 virSysinfoParseXML(const xmlNodePtr node,
                   xmlXPathContextPtr ctxt)
@@ -10844,6 +10881,26 @@ virDomainDefParseXML(virCapsPtr caps,
         VIR_FREE(nodes);
     }
 
+    def->nvram = NULL;
+    if ((n = virXPathNodeSet("./devices/nvram", ctxt, &nodes)) < 0) {
+        goto error;
+    }
+
+    if (n > 1) {
+        virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+                       _("only a single nvram device is supported"));
+        goto error;
+    }
+
+    if (n > 0) {
+        virDomainNVRAMDefPtr nvram =
+            virDomainNVRAMDefParseXML(nodes[0], flags);
+        if (!nvram)
+            goto error;
+        def->nvram = nvram;
+        VIR_FREE(nodes);
+    }
+
     /* analysis of the hub devices */
     if ((n = virXPathNodeSet("./devices/hub", ctxt, &nodes)) < 0) {
         goto error;
@@ -13854,6 +13911,21 @@ virDomainMemballoonDefFormat(virBufferPtr buf,
 }
 
 static int
+virDomainNVRAMDefFormat(virBufferPtr buf,
+                             virDomainNVRAMDefPtr def,
+                             unsigned int flags)
+{
+    virBufferAsprintf(buf, "    <nvram>\n");
+    if (virDomainDeviceInfoIsSet(&def->info, flags))
+        if (virDomainDeviceInfoFormat(buf, &def->info, flags) < 0)
+            return -1;
+
+     virBufferAddLit(buf, "    </nvram>\n");
+
+     return 0;
+}
+
+static int
 virDomainSysinfoDefFormat(virBufferPtr buf,
                           virSysinfoDefPtr def)
 {
@@ -15161,6 +15233,9 @@ virDomainDefFormatInternal(virDomainDefPtr def,
     if (def->rng)
         virDomainRNGDefFormat(buf, def->rng, flags);
 
+    if (def->nvram)
+        virDomainNVRAMDefFormat(buf, def->nvram, flags);
+
     virBufferAddLit(buf, "  </devices>\n");
 
     virBufferAdjustIndent(buf, 2);
@@ -16443,6 +16518,7 @@ virDomainDeviceDefCopy(virCapsPtr caps,
     case VIR_DOMAIN_DEVICE_SMARTCARD:
     case VIR_DOMAIN_DEVICE_CHR:
     case VIR_DOMAIN_DEVICE_MEMBALLOON:
+    case VIR_DOMAIN_DEVICE_NVRAM:
     case VIR_DOMAIN_DEVICE_LAST:
         virReportError(VIR_ERR_INTERNAL_ERROR,
                        _("Copying definition of '%d' type "
diff --git a/src/conf/domain_conf.h b/src/conf/domain_conf.h
index 96f11ba..03b7c9a 100644
--- a/src/conf/domain_conf.h
+++ b/src/conf/domain_conf.h
@@ -108,6 +108,9 @@ typedef virDomainChrDef *virDomainChrDefPtr;
 typedef struct _virDomainMemballoonDef virDomainMemballoonDef;
 typedef virDomainMemballoonDef *virDomainMemballoonDefPtr;
 
+typedef struct _virDomainNVRAMDef virDomainNVRAMDef;
+typedef virDomainNVRAMDef *virDomainNVRAMDefPtr;
+
 typedef struct _virDomainSnapshotObj virDomainSnapshotObj;
 typedef virDomainSnapshotObj *virDomainSnapshotObjPtr;
 
@@ -136,6 +139,7 @@ typedef enum {
     VIR_DOMAIN_DEVICE_SMARTCARD,
     VIR_DOMAIN_DEVICE_CHR,
     VIR_DOMAIN_DEVICE_MEMBALLOON,
+    VIR_DOMAIN_DEVICE_NVRAM,
     VIR_DOMAIN_DEVICE_RNG,
 
     VIR_DOMAIN_DEVICE_LAST
@@ -162,6 +166,7 @@ struct _virDomainDeviceDef {
         virDomainSmartcardDefPtr smartcard;
         virDomainChrDefPtr chr;
         virDomainMemballoonDefPtr memballoon;
+        virDomainNVRAMDefPtr nvram;
         virDomainRNGDefPtr rng;
     } data;
 };
@@ -1423,6 +1428,9 @@ struct _virDomainMemballoonDef {
     virDomainDeviceInfo info;
 };
 
+struct _virDomainNVRAMDef {
+    virDomainDeviceInfo info;
+};
 
 enum virDomainSmbiosMode {
     VIR_DOMAIN_SMBIOS_NONE = 0,
@@ -1883,6 +1891,7 @@ struct _virDomainDef {
     /* Only 1 */
     virDomainWatchdogDefPtr watchdog;
     virDomainMemballoonDefPtr memballoon;
+    virDomainNVRAMDefPtr nvram;
     virCPUDefPtr cpu;
     virSysinfoDefPtr sysinfo;
     virDomainRedirFilterDefPtr redirfilter;
@@ -2015,6 +2024,7 @@ int virDomainChrSourceDefCopy(virDomainChrSourceDefPtr src,
 void virDomainSoundCodecDefFree(virDomainSoundCodecDefPtr def);
 void virDomainSoundDefFree(virDomainSoundDefPtr def);
 void virDomainMemballoonDefFree(virDomainMemballoonDefPtr def);
+void virDomainNVRAMDefFree(virDomainNVRAMDefPtr def);
 void virDomainWatchdogDefFree(virDomainWatchdogDefPtr def);
 void virDomainVideoDefFree(virDomainVideoDefPtr def);
 virDomainHostdevDefPtr virDomainHostdevDefAlloc(void);
diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
index 4891b65..26c3001 100644
--- a/src/qemu/qemu_command.c
+++ b/src/qemu/qemu_command.c
@@ -1169,6 +1169,15 @@ int qemuDomainAssignSpaprVIOAddresses(virDomainDefPtr def,
             goto cleanup;
     }
 
+    if (def->nvram) {
+        if (def->os.arch == VIR_ARCH_PPC64 &&
+            STREQ(def->os.machine, "pseries"))
+            def->nvram->info.type = VIR_DOMAIN_DEVICE_ADDRESS_TYPE_SPAPRVIO;
+        if (qemuAssignSpaprVIOAddress(def, &def->nvram->info,
+                                      0x3000ul) < 0)
+            goto cleanup;
+    }
+
     /* No other devices are currently supported on spapr-vio */
 
     ret = 0;
@@ -3809,6 +3818,32 @@ error:
     return NULL;
 }
 
+char *
+qemuBuildNVRAMDevStr(virDomainNVRAMDefPtr dev)
+{
+    virBuffer buf = VIR_BUFFER_INITIALIZER;
+
+    if (dev->info.type == VIR_DOMAIN_DEVICE_ADDRESS_TYPE_SPAPRVIO &&
+        dev->info.addr.spaprvio.has_reg) {
+        virBufferAsprintf(&buf, "spapr-nvram.reg=0x%llx",
+                          dev->info.addr.spaprvio.reg);
+    } else {
+        virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
+                       "%s", _("NVRAM device address is not supported.\n"));
+        goto error;
+    }
+
+    if (virBufferError(&buf)) {
+        virReportOOMError();
+        goto error;
+    }
+
+    return virBufferContentAndReset(&buf);
+
+error:
+    virBufferFreeAndReset(&buf);
+    return NULL;
+}
 
 char *
 qemuBuildUSBInputDevStr(virDomainInputDefPtr dev,
@@ -7492,6 +7527,21 @@ qemuBuildCommandLine(virConnectPtr conn,
             goto error;
     }
 
+    if (def->nvram) {
+        if (def->os.arch == VIR_ARCH_PPC64 &&
+            STREQ(def->os.machine, "pseries")) {
+            char *optstr;
+            virCommandAddArg(cmd, "-global");
+            optstr = qemuBuildNVRAMDevStr(def->nvram);
+            if (!optstr)
+                goto error;
+            if (optstr)
+                virCommandAddArg(cmd, optstr);
+            VIR_FREE(optstr);
+        } else
+            virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
+                          _("NVRAM device is not supported"));
+    }
     if (snapshot)
         virCommandAddArgList(cmd, "-loadvm", snapshot->def->name, NULL);
 
@@ -9584,6 +9634,23 @@ virDomainDefPtr qemuParseCommandLine(virCapsPtr qemuCaps,
                 goto error;
             }
 
+        } else if (STREQ(arg, "-global") &&
+                   STRPREFIX(progargv[i + 1], "spapr-nvram.reg=")) {
+
+            WANT_VALUE();
+
+            if (VIR_ALLOC(def->nvram) < 0)
+                goto no_memory;
+
+            val += strlen("spapr-nvram.reg=");
+            if (virStrToLong_ull(val, NULL, 16,
+                                 &def->nvram->info.addr.spaprvio.reg) < 0) {
+                virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
+                               _("invalid value for spapr-nvram.reg :"
+                                 "'%s'"), val);
+                goto error;
+            }
+
         } else if (STREQ(arg, "-S")) {
             /* ignore, always added by libvirt */
         } else {
diff --git a/src/qemu/qemu_command.h b/src/qemu/qemu_command.h
index 17687f4..2b60997 100644
--- a/src/qemu/qemu_command.h
+++ b/src/qemu/qemu_command.h
@@ -118,6 +118,8 @@ char * qemuBuildWatchdogDevStr(virDomainWatchdogDefPtr dev,
 char * qemuBuildMemballoonDevStr(virDomainMemballoonDefPtr dev,
                                  virQEMUCapsPtr qemuCaps);
 
+char * qemuBuildNVRAMDevStr(virDomainNVRAMDefPtr dev);
+
 char * qemuBuildUSBInputDevStr(virDomainInputDefPtr dev,
                                virQEMUCapsPtr qemuCaps);
 
-- 
1.7.10.1


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