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authorAndrew Jones <drjones@redhat.com>2020-01-30 16:02:06 +0000
committerPeter Maydell <peter.maydell@linaro.org>2020-01-30 16:02:06 +0000
commitdea101a1ae9968c9fec6ab0291489dad7c49f36f (patch)
treea7c20f44a7f47478a8b475fb42609af5d2977f64 /target
parente5ac4200b4cddf44df9adbef677af0d1f1c579c6 (diff)
downloadqemu-arm-pull-target-arm-20200130.tar.gz
target/arm/cpu: Add the kvm-no-adjvtime CPU propertypull-target-arm-20200130
kvm-no-adjvtime is a KVM specific CPU property and a first of its kind. To accommodate it we also add kvm_arm_add_vcpu_properties() and a KVM specific CPU properties description to the CPU features document. Signed-off-by: Andrew Jones <drjones@redhat.com> Message-id: 20200120101023.16030-7-drjones@redhat.com Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Diffstat (limited to 'target')
-rw-r--r--target/arm/cpu.c2
-rw-r--r--target/arm/cpu64.c1
-rw-r--r--target/arm/kvm.c28
-rw-r--r--target/arm/kvm_arm.h11
-rw-r--r--target/arm/monitor.c1
5 files changed, 43 insertions, 0 deletions
diff --git a/target/arm/cpu.c b/target/arm/cpu.c
index 06907b36d7..f86e71a260 100644
--- a/target/arm/cpu.c
+++ b/target/arm/cpu.c
@@ -2551,6 +2551,7 @@ static void arm_max_initfn(Object *obj)
if (kvm_enabled()) {
kvm_arm_set_cpu_features_from_host(cpu);
+ kvm_arm_add_vcpu_properties(obj);
} else {
cortex_a15_initfn(obj);
@@ -2743,6 +2744,7 @@ static void arm_host_initfn(Object *obj)
if (arm_feature(&cpu->env, ARM_FEATURE_AARCH64)) {
aarch64_add_sve_properties(obj);
}
+ kvm_arm_add_vcpu_properties(obj);
arm_cpu_post_init(obj);
}
diff --git a/target/arm/cpu64.c b/target/arm/cpu64.c
index 61fd0ade29..2d97bf45e1 100644
--- a/target/arm/cpu64.c
+++ b/target/arm/cpu64.c
@@ -605,6 +605,7 @@ static void aarch64_max_initfn(Object *obj)
if (kvm_enabled()) {
kvm_arm_set_cpu_features_from_host(cpu);
+ kvm_arm_add_vcpu_properties(obj);
} else {
uint64_t t;
uint32_t u;
diff --git a/target/arm/kvm.c b/target/arm/kvm.c
index e36ab0b38b..85860e6f95 100644
--- a/target/arm/kvm.c
+++ b/target/arm/kvm.c
@@ -17,6 +17,8 @@
#include "qemu/timer.h"
#include "qemu/error-report.h"
#include "qemu/main-loop.h"
+#include "qom/object.h"
+#include "qapi/error.h"
#include "sysemu/sysemu.h"
#include "sysemu/kvm.h"
#include "sysemu/kvm_int.h"
@@ -179,6 +181,32 @@ void kvm_arm_set_cpu_features_from_host(ARMCPU *cpu)
env->features = arm_host_cpu_features.features;
}
+static bool kvm_no_adjvtime_get(Object *obj, Error **errp)
+{
+ return !ARM_CPU(obj)->kvm_adjvtime;
+}
+
+static void kvm_no_adjvtime_set(Object *obj, bool value, Error **errp)
+{
+ ARM_CPU(obj)->kvm_adjvtime = !value;
+}
+
+/* KVM VCPU properties should be prefixed with "kvm-". */
+void kvm_arm_add_vcpu_properties(Object *obj)
+{
+ if (!kvm_enabled()) {
+ return;
+ }
+
+ ARM_CPU(obj)->kvm_adjvtime = true;
+ object_property_add_bool(obj, "kvm-no-adjvtime", kvm_no_adjvtime_get,
+ kvm_no_adjvtime_set, &error_abort);
+ object_property_set_description(obj, "kvm-no-adjvtime",
+ "Set on to disable the adjustment of "
+ "the virtual counter. VM stopped time "
+ "will be counted.", &error_abort);
+}
+
bool kvm_arm_pmu_supported(CPUState *cpu)
{
return kvm_check_extension(cpu->kvm_state, KVM_CAP_ARM_PMU_V3);
diff --git a/target/arm/kvm_arm.h b/target/arm/kvm_arm.h
index 01a9a18278..ae9e075d75 100644
--- a/target/arm/kvm_arm.h
+++ b/target/arm/kvm_arm.h
@@ -256,6 +256,15 @@ void kvm_arm_sve_get_vls(CPUState *cs, unsigned long *map);
void kvm_arm_set_cpu_features_from_host(ARMCPU *cpu);
/**
+ * kvm_arm_add_vcpu_properties:
+ * @obj: The CPU object to add the properties to
+ *
+ * Add all KVM specific CPU properties to the CPU object. These
+ * are the CPU properties with "kvm-" prefixed names.
+ */
+void kvm_arm_add_vcpu_properties(Object *obj);
+
+/**
* kvm_arm_aarch32_supported:
* @cs: CPUState
*
@@ -345,6 +354,8 @@ static inline void kvm_arm_set_cpu_features_from_host(ARMCPU *cpu)
cpu->host_cpu_probe_failed = true;
}
+static inline void kvm_arm_add_vcpu_properties(Object *obj) {}
+
static inline bool kvm_arm_aarch32_supported(CPUState *cs)
{
return false;
diff --git a/target/arm/monitor.c b/target/arm/monitor.c
index fa054f8a36..9725dfff16 100644
--- a/target/arm/monitor.c
+++ b/target/arm/monitor.c
@@ -103,6 +103,7 @@ static const char *cpu_model_advertised_features[] = {
"sve128", "sve256", "sve384", "sve512",
"sve640", "sve768", "sve896", "sve1024", "sve1152", "sve1280",
"sve1408", "sve1536", "sve1664", "sve1792", "sve1920", "sve2048",
+ "kvm-no-adjvtime",
NULL
};