diff options
Diffstat (limited to 'target')
| -rw-r--r-- | target/i386/kvm/kvm.c | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/target/i386/kvm/kvm.c b/target/i386/kvm/kvm.c index f18d214..ec63b5e 100644 --- a/target/i386/kvm/kvm.c +++ b/target/i386/kvm/kvm.c @@ -15,6 +15,7 @@ #include "qemu/osdep.h" #include "qapi/qapi-events-run-state.h" #include "qapi/error.h" +#include "qapi/visitor.h" #include <sys/ioctl.h> #include <sys/utsname.h> #include <sys/syscall.h> @@ -2595,6 +2596,21 @@ int kvm_arch_init(MachineState *ms, KVMState *s) } } + if (s->notify_vmexit != NOTIFY_VMEXIT_OPTION_DISABLE && + kvm_check_extension(s, KVM_CAP_X86_NOTIFY_VMEXIT)) { + uint64_t notify_window_flags = + ((uint64_t)s->notify_window << 32) | + KVM_X86_NOTIFY_VMEXIT_ENABLED | + KVM_X86_NOTIFY_VMEXIT_USER; + ret = kvm_vm_enable_cap(s, KVM_CAP_X86_NOTIFY_VMEXIT, 0, + notify_window_flags); + if (ret < 0) { + error_report("kvm: Failed to enable notify vmexit cap: %s", + strerror(-ret)); + return ret; + } + } + return 0; } @@ -5137,6 +5153,9 @@ int kvm_arch_handle_exit(CPUState *cs, struct kvm_run *run) X86CPU *cpu = X86_CPU(cs); uint64_t code; int ret; + bool ctx_invalid; + char str[256]; + KVMState *state; switch (run->exit_reason) { case KVM_EXIT_HLT: @@ -5192,6 +5211,21 @@ int kvm_arch_handle_exit(CPUState *cs, struct kvm_run *run) /* already handled in kvm_arch_post_run */ ret = 0; break; + case KVM_EXIT_NOTIFY: + ctx_invalid = !!(run->notify.flags & KVM_NOTIFY_CONTEXT_INVALID); + state = KVM_STATE(current_accel()); + sprintf(str, "Encounter a notify exit with %svalid context in" + " guest. There can be possible misbehaves in guest." + " Please have a look.", ctx_invalid ? "in" : ""); + if (ctx_invalid || + state->notify_vmexit == NOTIFY_VMEXIT_OPTION_INTERNAL_ERROR) { + warn_report("KVM internal error: %s", str); + ret = -1; + } else { + warn_report_once("KVM: %s", str); + ret = 0; + } + break; default: fprintf(stderr, "KVM: unknown exit reason %d\n", run->exit_reason); ret = -1; @@ -5469,6 +5503,70 @@ void kvm_request_xsave_components(X86CPU *cpu, uint64_t mask) } } +static int kvm_arch_get_notify_vmexit(Object *obj, Error **errp) +{ + KVMState *s = KVM_STATE(obj); + return s->notify_vmexit; +} + +static void kvm_arch_set_notify_vmexit(Object *obj, int value, Error **errp) +{ + KVMState *s = KVM_STATE(obj); + + if (s->fd != -1) { + error_setg(errp, "Cannot set properties after the accelerator has been initialized"); + return; + } + + s->notify_vmexit = value; +} + +static void kvm_arch_get_notify_window(Object *obj, Visitor *v, + const char *name, void *opaque, + Error **errp) +{ + KVMState *s = KVM_STATE(obj); + uint32_t value = s->notify_window; + + visit_type_uint32(v, name, &value, errp); +} + +static void kvm_arch_set_notify_window(Object *obj, Visitor *v, + const char *name, void *opaque, + Error **errp) +{ + KVMState *s = KVM_STATE(obj); + Error *error = NULL; + uint32_t value; + + if (s->fd != -1) { + error_setg(errp, "Cannot set properties after the accelerator has been initialized"); + return; + } + + visit_type_uint32(v, name, &value, &error); + if (error) { + error_propagate(errp, error); + return; + } + + s->notify_window = value; +} + void kvm_arch_accel_class_init(ObjectClass *oc) { + object_class_property_add_enum(oc, "notify-vmexit", "NotifyVMexitOption", + &NotifyVmexitOption_lookup, + kvm_arch_get_notify_vmexit, + kvm_arch_set_notify_vmexit); + object_class_property_set_description(oc, "notify-vmexit", + "Enable notify VM exit"); + + object_class_property_add(oc, "notify-window", "uint32", + kvm_arch_get_notify_window, + kvm_arch_set_notify_window, + NULL, NULL); + object_class_property_set_description(oc, "notify-window", + "Clock cycles without an event window " + "after which a notification VM exit occurs"); } |