[libvirt] [PATCH 19/22] cpu: Add optional list of allowed features to virCPUBaseline
Jiri Denemark
jdenemar at redhat.com
Wed May 16 08:39:38 UTC 2018
When computing a baseline CPU for a specific hypervisor we have to make
sure to include only CPU features supported by the hypervisor. Otherwise
the computed CPU could not be used for starting a new domain.
Signed-off-by: Jiri Denemark <jdenemar at redhat.com>
---
src/bhyve/bhyve_driver.c | 2 +-
src/cpu/cpu.c | 8 +++++---
src/cpu/cpu.h | 2 ++
src/cpu/cpu_arm.c | 1 +
src/cpu/cpu_ppc64.c | 1 +
src/cpu/cpu_x86.c | 18 ++++++++++++++++++
src/libxl/libxl_driver.c | 2 +-
src/qemu/qemu_driver.c | 2 +-
src/test/test_driver.c | 2 +-
src/vz/vz_driver.c | 2 +-
tests/cputest.c | 2 +-
11 files changed, 33 insertions(+), 9 deletions(-)
diff --git a/src/bhyve/bhyve_driver.c b/src/bhyve/bhyve_driver.c
index 26047d31e2..97e8d4eb37 100644
--- a/src/bhyve/bhyve_driver.c
+++ b/src/bhyve/bhyve_driver.c
@@ -1398,7 +1398,7 @@ bhyveConnectBaselineCPU(virConnectPtr conn,
if (!(cpus = virCPUDefListParse(xmlCPUs, ncpus, VIR_CPU_TYPE_HOST)))
goto cleanup;
- if (!(cpu = virCPUBaseline(VIR_ARCH_NONE, cpus, ncpus, NULL,
+ if (!(cpu = virCPUBaseline(VIR_ARCH_NONE, cpus, ncpus, NULL, NULL,
!!(flags & VIR_CONNECT_BASELINE_CPU_MIGRATABLE))))
goto cleanup;
diff --git a/src/cpu/cpu.c b/src/cpu/cpu.c
index b6c1695f2a..cc93c49418 100644
--- a/src/cpu/cpu.c
+++ b/src/cpu/cpu.c
@@ -485,6 +485,7 @@ virCPUProbeHost(virArch arch)
* @cpus: list of host CPU definitions
* @ncpus: number of CPUs in @cpus
* @models: list of CPU models that can be considered for the baseline CPU
+ * @features: optional NULL terminated list of allowed features
* @migratable: requests non-migratable features to be removed from the result
*
* Computes the most feature-rich CPU which is compatible with all given
@@ -499,13 +500,14 @@ virCPUBaseline(virArch arch,
virCPUDefPtr *cpus,
unsigned int ncpus,
virDomainCapsCPUModelsPtr models,
+ const char **features,
bool migratable)
{
struct cpuArchDriver *driver;
size_t i;
- VIR_DEBUG("arch=%s, ncpus=%u, models=%p, migratable=%d",
- virArchToString(arch), ncpus, models, migratable);
+ VIR_DEBUG("arch=%s, ncpus=%u, models=%p, features=%p, migratable=%d",
+ virArchToString(arch), ncpus, models, features, migratable);
if (cpus) {
for (i = 0; i < ncpus; i++)
VIR_DEBUG("cpus[%zu]=%p", i, cpus[i]);
@@ -552,7 +554,7 @@ virCPUBaseline(virArch arch,
return NULL;
}
- return driver->baseline(cpus, ncpus, models, migratable);
+ return driver->baseline(cpus, ncpus, models, features, migratable);
}
diff --git a/src/cpu/cpu.h b/src/cpu/cpu.h
index 8c45bf8b31..81119b6aeb 100644
--- a/src/cpu/cpu.h
+++ b/src/cpu/cpu.h
@@ -76,6 +76,7 @@ typedef virCPUDefPtr
(*virCPUArchBaseline)(virCPUDefPtr *cpus,
unsigned int ncpus,
virDomainCapsCPUModelsPtr models,
+ const char **features,
bool migratable);
typedef int
@@ -198,6 +199,7 @@ virCPUBaseline(virArch arch,
virCPUDefPtr *cpus,
unsigned int ncpus,
virDomainCapsCPUModelsPtr models,
+ const char **features,
bool migratable);
int
diff --git a/src/cpu/cpu_arm.c b/src/cpu/cpu_arm.c
index a9aa065f9f..cc7da44ac4 100644
--- a/src/cpu/cpu_arm.c
+++ b/src/cpu/cpu_arm.c
@@ -76,6 +76,7 @@ static virCPUDefPtr
virCPUarmBaseline(virCPUDefPtr *cpus,
unsigned int ncpus ATTRIBUTE_UNUSED,
virDomainCapsCPUModelsPtr models ATTRIBUTE_UNUSED,
+ const char **features ATTRIBUTE_UNUSED,
bool migratable ATTRIBUTE_UNUSED)
{
virCPUDefPtr cpu = NULL;
diff --git a/src/cpu/cpu_ppc64.c b/src/cpu/cpu_ppc64.c
index c213245fc9..d562677fa3 100644
--- a/src/cpu/cpu_ppc64.c
+++ b/src/cpu/cpu_ppc64.c
@@ -770,6 +770,7 @@ static virCPUDefPtr
virCPUppc64Baseline(virCPUDefPtr *cpus,
unsigned int ncpus,
virDomainCapsCPUModelsPtr models ATTRIBUTE_UNUSED,
+ const char **features ATTRIBUTE_UNUSED,
bool migratable ATTRIBUTE_UNUSED)
{
struct ppc64_map *map;
diff --git a/src/cpu/cpu_x86.c b/src/cpu/cpu_x86.c
index 6bef4089e9..809da94117 100644
--- a/src/cpu/cpu_x86.c
+++ b/src/cpu/cpu_x86.c
@@ -2467,6 +2467,7 @@ static virCPUDefPtr
virCPUx86Baseline(virCPUDefPtr *cpus,
unsigned int ncpus,
virDomainCapsCPUModelsPtr models,
+ const char **features,
bool migratable)
{
virCPUx86MapPtr map = NULL;
@@ -2478,6 +2479,7 @@ virCPUx86Baseline(virCPUDefPtr *cpus,
bool outputVendor = true;
const char *modelName;
bool matchingNames = true;
+ virCPUDataPtr featData = NULL;
if (!(map = virCPUx86GetMap()))
goto error;
@@ -2550,6 +2552,21 @@ virCPUx86Baseline(virCPUDefPtr *cpus,
model = NULL;
}
+ if (features) {
+ virCPUx86FeaturePtr feat;
+
+ if (!(featData = virCPUDataNew(archs[0])))
+ goto cleanup;
+
+ for (i = 0; features[i]; i++) {
+ if ((feat = x86FeatureFind(map, features[i])) &&
+ x86DataAdd(&featData->data.x86, &feat->data) < 0)
+ goto cleanup;
+ }
+
+ x86DataIntersect(&base_model->data, &featData->data.x86);
+ }
+
if (x86DataIsEmpty(&base_model->data)) {
virReportError(VIR_ERR_OPERATION_FAILED,
"%s", _("CPUs are incompatible"));
@@ -2571,6 +2588,7 @@ virCPUx86Baseline(virCPUDefPtr *cpus,
cleanup:
x86ModelFree(base_model);
+ virCPUx86DataFree(featData);
return cpu;
diff --git a/src/libxl/libxl_driver.c b/src/libxl/libxl_driver.c
index a85ce84404..8c40661e5a 100644
--- a/src/libxl/libxl_driver.c
+++ b/src/libxl/libxl_driver.c
@@ -6349,7 +6349,7 @@ libxlConnectBaselineCPU(virConnectPtr conn,
if (!(cpus = virCPUDefListParse(xmlCPUs, ncpus, VIR_CPU_TYPE_HOST)))
goto cleanup;
- if (!(cpu = virCPUBaseline(VIR_ARCH_NONE, cpus, ncpus, NULL,
+ if (!(cpu = virCPUBaseline(VIR_ARCH_NONE, cpus, ncpus, NULL, NULL,
!!(flags & VIR_CONNECT_BASELINE_CPU_MIGRATABLE))))
goto cleanup;
diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index b95e1f5296..e036764f92 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -13179,7 +13179,7 @@ qemuConnectBaselineCPU(virConnectPtr conn ATTRIBUTE_UNUSED,
if (!(cpus = virCPUDefListParse(xmlCPUs, ncpus, VIR_CPU_TYPE_HOST)))
goto cleanup;
- if (!(baseline = virCPUBaseline(VIR_ARCH_NONE, cpus, ncpus, NULL,
+ if (!(baseline = virCPUBaseline(VIR_ARCH_NONE, cpus, ncpus, NULL, NULL,
!!(flags & VIR_CONNECT_BASELINE_CPU_MIGRATABLE))))
goto cleanup;
diff --git a/src/test/test_driver.c b/src/test/test_driver.c
index 3b4acaf7fe..09f17bc8f9 100644
--- a/src/test/test_driver.c
+++ b/src/test/test_driver.c
@@ -1536,7 +1536,7 @@ testConnectBaselineCPU(virConnectPtr conn ATTRIBUTE_UNUSED,
if (!(cpus = virCPUDefListParse(xmlCPUs, ncpus, VIR_CPU_TYPE_HOST)))
goto cleanup;
- if (!(cpu = virCPUBaseline(VIR_ARCH_NONE, cpus, ncpus, NULL, false)))
+ if (!(cpu = virCPUBaseline(VIR_ARCH_NONE, cpus, ncpus, NULL, NULL, false)))
goto cleanup;
if ((flags & VIR_CONNECT_BASELINE_CPU_EXPAND_FEATURES) &&
diff --git a/src/vz/vz_driver.c b/src/vz/vz_driver.c
index 50cd0acfdf..c9520d4a58 100644
--- a/src/vz/vz_driver.c
+++ b/src/vz/vz_driver.c
@@ -934,7 +934,7 @@ vzConnectBaselineCPU(virConnectPtr conn,
if (!(cpus = virCPUDefListParse(xmlCPUs, ncpus, VIR_CPU_TYPE_HOST)))
goto cleanup;
- if (!(cpu = virCPUBaseline(VIR_ARCH_NONE, cpus, ncpus, NULL, false)))
+ if (!(cpu = virCPUBaseline(VIR_ARCH_NONE, cpus, ncpus, NULL, NULL, false)))
goto cleanup;
if ((flags & VIR_CONNECT_BASELINE_CPU_EXPAND_FEATURES) &&
diff --git a/tests/cputest.c b/tests/cputest.c
index 9b84ffea86..baf2b3c648 100644
--- a/tests/cputest.c
+++ b/tests/cputest.c
@@ -321,7 +321,7 @@ cpuTestBaseline(const void *arg)
if (!(cpus = cpuTestLoadMultiXML(data->arch, data->name, &ncpus)))
goto cleanup;
- baseline = virCPUBaseline(data->arch, cpus, ncpus, NULL,
+ baseline = virCPUBaseline(data->arch, cpus, ncpus, NULL, NULL,
!!(data->flags & VIR_CONNECT_BASELINE_CPU_MIGRATABLE));
if (baseline &&
--
2.17.0
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