External/libvirt
1
0
Fork 0
mirror of https://gitlab.com/libvirt/libvirt.git synced 2024-12-24 06:35:24 +00:00
Code Issues Packages Projects Releases Wiki Activity

cpuBaseline: Detect empty set of common features

Browse Source 
In case the set of CPUs has no features in common, report incompatible
CPUs instead of returning the simplest CPU model with all features
disabled.
This commit is contained in:
Jiri Denemark 2010-07-02 17:51:40 +02:00
parent 4e0f648fbb
commit d9332c23b4
1 changed files with 26 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

26
src/cpu/cpu_x86.c
View File

@ -233,6 +233,26 @@ x86DataSubtract(union cpuData *data1,
}
static bool
x86DataIsEmpty(union cpuData *data)
{
struct cpuX86cpuid zero = { 0, 0, 0, 0, 0 };
unsigned int i;
for (i = 0; i < data->x86.basic_len; i++) {
if (!x86cpuidMatch(data->x86.basic + i, &zero))
return false;
}
for (i = 0; i < data->x86.extended_len; i++) {
if (!x86cpuidMatch(data->x86.extended + i, &zero))
return false;
}
return true;
}
static union cpuData *
x86DataFromModel(const struct x86_model *model)
{
@ -1363,6 +1383,12 @@ x86Baseline(virCPUDefPtr *cpus,
if (!(data = x86DataFromModel(base_model)))
goto no_memory;
if (x86DataIsEmpty(data)) {
virCPUReportError(VIR_ERR_OPERATION_FAILED,
"%s", _("CPUs are incompatible"));
goto error;
}
if (x86Decode(cpu, data, models, nmodels, NULL) < 0)
goto error;