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>

--- 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