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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
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