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authorAndrey Smetanin <asmetanin@virtuozzo.com>2015-11-25 18:21:25 +0300
committerPaolo Bonzini <pbonzini@redhat.com>2015-12-17 15:24:35 +0100
commitff99aa64b13ea85ee35ec09c3fe720ad8bc83154 (patch)
treecf5f66f439ee9b0515288cfe76a1d6814b280563 /target-i386/machine.c
parentb67dbb70703bbb156dccc654550b6ece27920490 (diff)
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target-i386/kvm: Hyper-V SynIC timers MSR's support
Hyper-V SynIC timers are host timers that are configurable by guest through corresponding MSR's (HV_X64_MSR_STIMER*). Guest setup and use fired by host events(SynIC interrupt and appropriate timer expiration message) as guest clock events. The state of Hyper-V SynIC timers are stored in corresponding MSR's. This patch seria implements such MSR's support and migration. Signed-off-by: Andrey Smetanin <asmetanin@virtuozzo.com> CC: Paolo Bonzini <pbonzini@redhat.com> CC: Richard Henderson <rth@twiddle.net> CC: Eduardo Habkost <ehabkost@redhat.com> CC: "Andreas Färber" <afaerber@suse.de> CC: Marcelo Tosatti <mtosatti@redhat.com> CC: Denis V. Lunev <den@openvz.org> CC: Roman Kagan <rkagan@virtuozzo.com> CC: kvm@vger.kernel.org Message-Id: <1448464885-8300-3-git-send-email-asmetanin@virtuozzo.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'target-i386/machine.c')
-rw-r--r--target-i386/machine.c29
1 files changed, 29 insertions, 0 deletions
diff --git a/target-i386/machine.c b/target-i386/machine.c
index d41e286..6126d96 100644
--- a/target-i386/machine.c
+++ b/target-i386/machine.c
@@ -746,6 +746,34 @@ static const VMStateDescription vmstate_msr_hyperv_synic = {
}
};
+static bool hyperv_stimer_enable_needed(void *opaque)
+{
+ X86CPU *cpu = opaque;
+ CPUX86State *env = &cpu->env;
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(env->msr_hv_stimer_config); i++) {
+ if (env->msr_hv_stimer_config[i] || env->msr_hv_stimer_count[i]) {
+ return true;
+ }
+ }
+ return false;
+}
+
+static const VMStateDescription vmstate_msr_hyperv_stimer = {
+ .name = "cpu/msr_hyperv_stimer",
+ .version_id = 1,
+ .minimum_version_id = 1,
+ .needed = hyperv_stimer_enable_needed,
+ .fields = (VMStateField[]) {
+ VMSTATE_UINT64_ARRAY(env.msr_hv_stimer_config,
+ X86CPU, HV_SYNIC_STIMER_COUNT),
+ VMSTATE_UINT64_ARRAY(env.msr_hv_stimer_count,
+ X86CPU, HV_SYNIC_STIMER_COUNT),
+ VMSTATE_END_OF_LIST()
+ }
+};
+
static bool avx512_needed(void *opaque)
{
X86CPU *cpu = opaque;
@@ -930,6 +958,7 @@ VMStateDescription vmstate_x86_cpu = {
&vmstate_msr_hyperv_crash,
&vmstate_msr_hyperv_runtime,
&vmstate_msr_hyperv_synic,
+ &vmstate_msr_hyperv_stimer,
&vmstate_avx512,
&vmstate_xss,
NULL