Set the vm phys_bits through the phys and hostphysbits in XML

<phys bits='43' /> corresponds to "-cpu-phys-bits=42"

<hostphysbits /> corresponds to "host-phys-bits=on"

<cpu mode='host-passthrough' check='none'>

    <phys bits='43' />

    <hostphysbits />

</cpu>

---

 src/conf/cpu_conf.c     | 34 ++++++++++++++++++++++++++++++++++

 src/conf/cpu_conf.h     |  2 ++

 src/qemu/qemu_command.c |  6 ++++++

 3 files changed, 42 insertions(+)

diff --git a/src/conf/cpu_conf.c b/src/conf/cpu_conf.c

index 380a74691d..41f7c26f63 100644

--- a/src/conf/cpu_conf.c

+++ b/src/conf/cpu_conf.c

@@ -158,6 +158,8 @@ virCPUDefCopyModelFilter(virCPUDefPtr dst,

     dst->model = g_strdup(src->model);

     dst->vendor = g_strdup(src->vendor);

     dst->vendor_id = g_strdup(src->vendor_id);

+    dst->phys_bits = src->phys_bits;

+    dst->host_phys_bits = src->host_phys_bits;

     dst->microcodeVersion = src->microcodeVersion;

     dst->nfeatures_max = src->nfeatures;

     dst->nfeatures = 0;

@@ -540,6 +542,18 @@ virCPUDefParseXML(xmlXPathContextPtr ctxt,

         return -1;

     }

+    if (virXPathNode("./phys[1]", ctxt)) {

+        unsigned long phys_bits;

+        if (virXPathULong("string(./phys[1]/@bits)",

+                ctxt, &phys_bits) >=0 ) {

+            def->phys_bits = (unsigned int) phys_bits;

+        }

+    }

+

+    if (virXPathNode("./hostphysbits[1]", ctxt)) {

+        def->host_phys_bits = true;

+    }

+

     if (virXPathNode("./topology[1]", ctxt)) {

         unsigned long ul;

@@ -811,6 +825,12 @@ virCPUDefFormatBuf(virBufferPtr buf,

         virBufferAddLit(buf, "/>\n");

     }

+    if (def->phys_bits > 0)

+        virBufferAsprintf(buf, "<phys bits='%u' />\n", def->phys_bits);

+

+    if (def->host_phys_bits)

+        virBufferAddLit(buf, "<hostphysbits />\n");

+

     if (def->sockets && def->dies && def->cores && def->threads) {

         virBufferAddLit(buf, "<topology");

         virBufferAsprintf(buf, " sockets='%u'", def->sockets);

@@ -1067,6 +1087,20 @@ virCPUDefIsEqual(virCPUDefPtr src,

         return false;

     }

+    if (src->phys_bits != dst->phys_bits) {

+        virReportError(VIR_ERR_CONFIG_UNSUPPORTED,

+                       _("Target CPU phys_bits %d does not match source %d"),

+                       dst->phys_bits, src->phys_bits);

+        goto cleanup;

+    }

+

+    if (src->host_phys_bits != dst->host_phys_bits) {

+        virReportError(VIR_ERR_CONFIG_UNSUPPORTED,

+                       _("Target CPU host_phys_bits %d does not match source %d"),

+                       dst->host_phys_bits, src->host_phys_bits);

+        goto cleanup;

+    }

+

     if (src->sockets != dst->sockets) {

         MISMATCH(_("Target CPU sockets %d does not match source %d"),

                  dst->sockets, src->sockets);

diff --git a/src/conf/cpu_conf.h b/src/conf/cpu_conf.h

index 7ab198d370..f2a23ad41e 100644

--- a/src/conf/cpu_conf.h

+++ b/src/conf/cpu_conf.h

@@ -132,6 +132,8 @@ struct _virCPUDef {

     char *vendor_id;    /* vendor id returned by CPUID in the guest */

     int fallback;       /* enum virCPUFallback */

     char *vendor;

+    unsigned int phys_bits;

+    bool host_phys_bits;

     unsigned int microcodeVersion;

     unsigned int sockets;

     unsigned int dies;

diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c

index 1b4fa77867..d9bf3d5ce8 100644

--- a/src/qemu/qemu_command.c

+++ b/src/qemu/qemu_command.c

@@ -6729,6 +6729,12 @@ qemuBuildCpuCommandLine(virCommandPtr cmd,

             virBufferAddLit(&buf, ",l3-cache=off");

     }

+    if (def->cpu && def->cpu->phys_bits > 0)

+        virBufferAsprintf(&buf, ",phys-bits=%u", def->cpu->phys_bits);

+

+    if (def->cpu && def->cpu->host_phys_bits)

+        virBufferAddLit(&buf, ",host-phys-bits=on");

+

     cpu = virBufferContentAndReset(&cpu_buf);

     cpu_flags = virBufferContentAndReset(&buf);

--

2.24.3