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hw/arm/virt: Implement kvm-steal-time

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We add the kvm-steal-time CPU property and implement it for machvirt.
A tiny bit of refactoring was also done to allow pmu and pvtime to
use the same vcpu device helper functions.

Reviewed-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Andrew Jones <drjones@redhat.com>
Message-id: 20201001061718.101915-7-drjones@redhat.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Andrew Jones 2020-10-01 08:17:18 +02:00 • committed by Peter Maydell
parent 05889d15d1
commit 68970d1e0d
10 changed files with 209 additions and 13 deletions
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25
tests/qtest/arm-cpu-features.c
View file

@ -452,6 +452,7 @@ static void test_query_cpu_model_expansion(const void *data)
assert_set_feature(qts, "max", "pmu", true);
assert_has_not_feature(qts, "max", "kvm-no-adjvtime");
assert_has_not_feature(qts, "max", "kvm-steal-time");
if (g_str_equal(qtest_get_arch(), "aarch64")) {
assert_has_feature_enabled(qts, "max", "aarch64");
@ -493,6 +494,7 @@ static void test_query_cpu_model_expansion_kvm(const void *data)
assert_set_feature(qts, "host", "kvm-no-adjvtime", false);
if (g_str_equal(qtest_get_arch(), "aarch64")) {
bool kvm_supports_steal_time;
bool kvm_supports_sve;
char max_name[8], name[8];
uint32_t max_vq, vq;
@ -500,6 +502,10 @@ static void test_query_cpu_model_expansion_kvm(const void *data)
QDict *resp;
char *error;
assert_error(qts, "cortex-a15",
"We cannot guarantee the CPU type 'cortex-a15' works "
"with KVM on this host", NULL);
assert_has_feature_enabled(qts, "host", "aarch64");
/* Enabling and disabling pmu should always work. */
@ -507,16 +513,26 @@ static void test_query_cpu_model_expansion_kvm(const void *data)
assert_set_feature(qts, "host", "pmu", false);
assert_set_feature(qts, "host", "pmu", true);
assert_error(qts, "cortex-a15",
"We cannot guarantee the CPU type 'cortex-a15' works "
"with KVM on this host", NULL);
/*
* Some features would be enabled by default, but they're disabled
* because this instance of KVM doesn't support them. Test that the
* features are present, and, when enabled, issue further tests.
*/
assert_has_feature(qts, "host", "kvm-steal-time");
assert_has_feature(qts, "host", "sve");
resp = do_query_no_props(qts, "host");
kvm_supports_steal_time = resp_get_feature(resp, "kvm-steal-time");
kvm_supports_sve = resp_get_feature(resp, "sve");
vls = resp_get_sve_vls(resp);
qobject_unref(resp);
if (kvm_supports_steal_time) {
/* If we have steal-time then we should be able to toggle it. */
assert_set_feature(qts, "host", "kvm-steal-time", false);
assert_set_feature(qts, "host", "kvm-steal-time", true);
}
if (kvm_supports_sve) {
g_assert(vls != 0);
max_vq = 64 - __builtin_clzll(vls);
@ -577,6 +593,7 @@ static void test_query_cpu_model_expansion_kvm(const void *data)
assert_has_not_feature(qts, "host", "aarch64");
assert_has_not_feature(qts, "host", "pmu");
assert_has_not_feature(qts, "host", "sve");
assert_has_not_feature(qts, "host", "kvm-steal-time");
}
qtest_quit(qts);