Re: [PATCH 1/1] set vm physical bits(phys_bits)

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> --- docs/schemas/cputypes.rng | 20 ++++++++++++++++++++ src/conf/cpu_conf.c | 34 ++++++++++++++++++++++++++++++++++ src/conf/cpu_conf.h |2 ++ src/qemu/qemu_command.c |6 ++++++ 4 files changed, 62 insertions(+)

diff --git a/docs/schemas/cputypes.rng b/docs/schemas/cputypes.rng index 77c8fa783b..fb8a14ddea 100644 --- a/docs/schemas/cputypes.rng +++ b/docs/schemas/cputypes.rng @@ -300,6 +300,20 @@ </element> </define> +<define name="cpuPhysBits"> +<element name="phys"> +<attribute name="bits"> +<ref name="positiveInteger"/> +</attribute> +</element> +</define> + +<define name="cpuHostPhysBits"> +<element name="hostphysbits"> +<empty/> +</element> +</define> + <define name="hostcpu"> <element name="cpu"> <element name="arch"> @@ -414,6 +428,12 @@ <optional> <ref name="cpuCache"/> </optional> +<optional> +<ref name="cpuPhysBits"/> +</optional> +<optional> +<ref name="cpuHostPhysBits"/> +</optional> </interleave> </element> </define> diff --git a/src/conf/cpu_conf.c b/src/conf/cpu_conf.c index 380a74691d..24b0fa67ef 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 (virXPathUInt("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); --