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authorMichael S. Tsirkin <mst@redhat.com>2012-08-28 20:43:56 +0300
committerAnthony Liguori <aliguori@us.ibm.com>2012-08-29 10:51:28 -0500
commitbc9a839d569d4d8532c5c097bf1f4583226e3aa0 (patch)
tree721b6c3f7652903f634815a00390c8115fffdc97
parent651682dcf54c4f2e07904bd822a97895900f6d8a (diff)
downloadqemu-arm-bc9a839d569d4d8532c5c097bf1f4583226e3aa0.tar.gz
kvm: get/set PV EOI MSR
Support get/set of new PV EOI MSR, for migration. Add an optional section for MSR value - send it out in case MSR was changed from the default value (0). Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
-rw-r--r--target-i386/cpu.h1
-rw-r--r--target-i386/kvm.c13
-rw-r--r--target-i386/machine.c21
3 files changed, 35 insertions, 0 deletions
diff --git a/target-i386/cpu.h b/target-i386/cpu.h
index 60f9e972bd..0677502dcc 100644
--- a/target-i386/cpu.h
+++ b/target-i386/cpu.h
@@ -699,6 +699,7 @@ typedef struct CPUX86State {
uint64_t system_time_msr;
uint64_t wall_clock_msr;
uint64_t async_pf_en_msr;
+ uint64_t pv_eoi_en_msr;
uint64_t tsc;
uint64_t tsc_deadline;
diff --git a/target-i386/kvm.c b/target-i386/kvm.c
index 696b14a04a..ffc294ec39 100644
--- a/target-i386/kvm.c
+++ b/target-i386/kvm.c
@@ -63,6 +63,7 @@ static bool has_msr_star;
static bool has_msr_hsave_pa;
static bool has_msr_tsc_deadline;
static bool has_msr_async_pf_en;
+static bool has_msr_pv_eoi_en;
static bool has_msr_misc_enable;
static int lm_capable_kernel;
@@ -455,6 +456,8 @@ int kvm_arch_init_vcpu(CPUX86State *env)
has_msr_async_pf_en = c->eax & (1 << KVM_FEATURE_ASYNC_PF);
+ has_msr_pv_eoi_en = c->eax & (1 << KVM_FEATURE_PV_EOI);
+
cpu_x86_cpuid(env, 0, 0, &limit, &unused, &unused, &unused);
for (i = 0; i <= limit; i++) {
@@ -1017,6 +1020,10 @@ static int kvm_put_msrs(CPUX86State *env, int level)
kvm_msr_entry_set(&msrs[n++], MSR_KVM_ASYNC_PF_EN,
env->async_pf_en_msr);
}
+ if (has_msr_pv_eoi_en) {
+ kvm_msr_entry_set(&msrs[n++], MSR_KVM_PV_EOI_EN,
+ env->pv_eoi_en_msr);
+ }
if (hyperv_hypercall_available()) {
kvm_msr_entry_set(&msrs[n++], HV_X64_MSR_GUEST_OS_ID, 0);
kvm_msr_entry_set(&msrs[n++], HV_X64_MSR_HYPERCALL, 0);
@@ -1259,6 +1266,9 @@ static int kvm_get_msrs(CPUX86State *env)
if (has_msr_async_pf_en) {
msrs[n++].index = MSR_KVM_ASYNC_PF_EN;
}
+ if (has_msr_pv_eoi_en) {
+ msrs[n++].index = MSR_KVM_PV_EOI_EN;
+ }
if (env->mcg_cap) {
msrs[n++].index = MSR_MCG_STATUS;
@@ -1338,6 +1348,9 @@ static int kvm_get_msrs(CPUX86State *env)
case MSR_KVM_ASYNC_PF_EN:
env->async_pf_en_msr = msrs[i].data;
break;
+ case MSR_KVM_PV_EOI_EN:
+ env->pv_eoi_en_msr = msrs[i].data;
+ break;
}
}
diff --git a/target-i386/machine.c b/target-i386/machine.c
index a8be058d2d..477150887b 100644
--- a/target-i386/machine.c
+++ b/target-i386/machine.c
@@ -279,6 +279,13 @@ static bool async_pf_msr_needed(void *opaque)
return cpu->async_pf_en_msr != 0;
}
+static bool pv_eoi_msr_needed(void *opaque)
+{
+ CPUX86State *cpu = opaque;
+
+ return cpu->pv_eoi_en_msr != 0;
+}
+
static const VMStateDescription vmstate_async_pf_msr = {
.name = "cpu/async_pf_msr",
.version_id = 1,
@@ -290,6 +297,17 @@ static const VMStateDescription vmstate_async_pf_msr = {
}
};
+static const VMStateDescription vmstate_pv_eoi_msr = {
+ .name = "cpu/async_pv_eoi_msr",
+ .version_id = 1,
+ .minimum_version_id = 1,
+ .minimum_version_id_old = 1,
+ .fields = (VMStateField []) {
+ VMSTATE_UINT64(pv_eoi_en_msr, CPUX86State),
+ VMSTATE_END_OF_LIST()
+ }
+};
+
static bool fpop_ip_dp_needed(void *opaque)
{
CPUX86State *env = opaque;
@@ -454,6 +472,9 @@ static const VMStateDescription vmstate_cpu = {
.vmsd = &vmstate_async_pf_msr,
.needed = async_pf_msr_needed,
} , {
+ .vmsd = &vmstate_pv_eoi_msr,
+ .needed = pv_eoi_msr_needed,
+ } , {
.vmsd = &vmstate_fpop_ip_dp,
.needed = fpop_ip_dp_needed,
}, {