#include <linux/user-return-notifier.h>
#include <linux/srcu.h>
#include <linux/slab.h>
+#include <linux/perf_event.h>
#include <trace/events/kvm.h>
#define CREATE_TRACE_POINTS
}
kvm_x86_ops->set_cr4(vcpu, cr4);
vcpu->arch.cr4 = cr4;
- vcpu->arch.mmu.base_role.cr4_pge = (cr4 & X86_CR4_PGE) && !tdp_enabled;
kvm_mmu_reset_context(vcpu);
}
EXPORT_SYMBOL_GPL(kvm_set_cr4);
struct kvm_mem_alias *alias;
struct kvm_mem_aliases *aliases;
- aliases = rcu_dereference(kvm->arch.aliases);
+ aliases = kvm_aliases(kvm);
for (i = 0; i < aliases->naliases; ++i) {
alias = &aliases->aliases[i];
struct kvm_mem_alias *alias;
struct kvm_mem_aliases *aliases;
- aliases = rcu_dereference(kvm->arch.aliases);
+ aliases = kvm_aliases(kvm);
for (i = 0; i < aliases->naliases; ++i) {
alias = &aliases->aliases[i];
}
}
+static DEFINE_PER_CPU(struct kvm_vcpu *, current_vcpu);
+
+static int kvm_is_in_guest(void)
+{
+ return percpu_read(current_vcpu) != NULL;
+}
+
+static int kvm_is_user_mode(void)
+{
+ int user_mode = 3;
+
+ if (percpu_read(current_vcpu))
+ user_mode = kvm_x86_ops->get_cpl(percpu_read(current_vcpu));
+
+ return user_mode != 0;
+}
+
+static unsigned long kvm_get_guest_ip(void)
+{
+ unsigned long ip = 0;
+
+ if (percpu_read(current_vcpu))
+ ip = kvm_rip_read(percpu_read(current_vcpu));
+
+ return ip;
+}
+
+static struct perf_guest_info_callbacks kvm_guest_cbs = {
+ .is_in_guest = kvm_is_in_guest,
+ .is_user_mode = kvm_is_user_mode,
+ .get_guest_ip = kvm_get_guest_ip,
+};
+
+void kvm_before_handle_nmi(struct kvm_vcpu *vcpu)
+{
+ percpu_write(current_vcpu, vcpu);
+}
+EXPORT_SYMBOL_GPL(kvm_before_handle_nmi);
+
+void kvm_after_handle_nmi(struct kvm_vcpu *vcpu)
+{
+ percpu_write(current_vcpu, NULL);
+}
+EXPORT_SYMBOL_GPL(kvm_after_handle_nmi);
+
int kvm_arch_init(void *opaque)
{
int r;
kvm_timer_init();
+ perf_register_guest_info_callbacks(&kvm_guest_cbs);
+
return 0;
out:
void kvm_arch_exit(void)
{
+ perf_unregister_guest_info_callbacks(&kvm_guest_cbs);
+
if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC))
cpufreq_unregister_notifier(&kvmclock_cpufreq_notifier_block,
CPUFREQ_TRANSITION_NOTIFIER);
tss_selector, reason, has_error_code,
error_code);
- if (ret == X86EMUL_CONTINUE)
- kvm_x86_ops->set_rflags(vcpu, vcpu->arch.emulate_ctxt.eflags);
+ if (ret)
+ return EMULATE_FAIL;
- return (ret != X86EMUL_CONTINUE);
+ kvm_x86_ops->set_rflags(vcpu, vcpu->arch.emulate_ctxt.eflags);
+ return EMULATE_DONE;
}
EXPORT_SYMBOL_GPL(kvm_task_switch);