From: Nicușor Cîțu <ncitu@xxxxxxxxxxxxxxx>
This function is needed for KVMI_VCPU_CONTROL_SINGLESTEP
and KVMI_EVENT_SINGLESTEP.
Signed-off-by: Nicușor Cîțu <ncitu@xxxxxxxxxxxxxxx>
Signed-off-by: Adalbert Lazăr <alazar@xxxxxxxxxxxxxxx>
---
arch/x86/include/asm/kvm_host.h | 1 +
arch/x86/kvm/vmx/vmx.c | 11 +++++++++++
2 files changed, 12 insertions(+)
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index 2e993b240b66..5b8e44e494b1 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -1292,6 +1292,7 @@ struct kvm_x86_ops {
u64 (*fault_gla)(struct kvm_vcpu *vcpu);
bool (*spt_fault)(struct kvm_vcpu *vcpu);
bool (*gpt_translation_fault)(struct kvm_vcpu *vcpu);
+ void (*control_singlestep)(struct kvm_vcpu *vcpu, bool enable);
};
struct kvm_arch_async_pf {
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index 5422c35a3216..13462ef2ce9e 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -7928,6 +7928,16 @@ static bool vmx_gpt_translation_fault(struct kvm_vcpu *vcpu)
return true;
}
+static void vmx_control_singlestep(struct kvm_vcpu *vcpu, bool enable)
+{
+ if (enable)
+ exec_controls_setbit(to_vmx(vcpu),
+ CPU_BASED_MONITOR_TRAP_FLAG);
+ else
+ exec_controls_clearbit(to_vmx(vcpu),
+ CPU_BASED_MONITOR_TRAP_FLAG);
+}
+
static struct kvm_x86_ops vmx_x86_ops __ro_after_init = {
.cpu_has_kvm_support = cpu_has_kvm_support,
.disabled_by_bios = vmx_disabled_by_bios,
@@ -8092,6 +8102,7 @@ static struct kvm_x86_ops vmx_x86_ops __ro_after_init = {
.fault_gla = vmx_fault_gla,
.spt_fault = vmx_spt_fault,
.gpt_translation_fault = vmx_gpt_translation_fault,
+ .control_singlestep = vmx_control_singlestep,
};
static void vmx_cleanup_l1d_flush(void)
