[RFC PATCH v6 60/92] kvm: x86: add kvm_arch_vcpu_set_guest_debug()

[Adalbert Lazăr <alazar@xxxxxxxxxxxxxxx>]

This function is need in order to intercept breakpoints and send
KVMI_EVENT_BREAKPOINT events to the introspection tool.

Signed-off-by: Adalbert Lazăr <alazar@xxxxxxxxxxxxxxx>
---
 arch/x86/kvm/x86.c       | 18 +++++++++++++-----
 include/linux/kvm_host.h |  2 ++
 2 files changed, 15 insertions(+), 5 deletions(-)

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 278a286ba262..e633f297e86d 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -8747,14 +8747,12 @@ int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
 	return ret;
 }
 
-int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
-					struct kvm_guest_debug *dbg)
+int kvm_arch_vcpu_set_guest_debug(struct kvm_vcpu *vcpu,
+				  struct kvm_guest_debug *dbg)
 {
 	unsigned long rflags;
 	int i, r;
 
-	vcpu_load(vcpu);
-
 	if (dbg->control & (KVM_GUESTDBG_INJECT_DB | KVM_GUESTDBG_INJECT_BP)) {
 		r = -EBUSY;
 		if (vcpu->arch.exception.pending)
@@ -8800,10 +8798,20 @@ int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
 	r = 0;
 
 out:
-	vcpu_put(vcpu);
 	return r;
 }
 
+int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
+					struct kvm_guest_debug *dbg)
+{
+	int ret;
+
+	vcpu_load(vcpu);
+	ret = kvm_arch_vcpu_set_guest_debug(vcpu, dbg);
+	vcpu_put(vcpu);
+	return ret;
+}
+
 /*
  * Translate a guest virtual address to a guest physical address.
  */
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index 3aad3b96107b..691c24598b4d 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -804,6 +804,8 @@ int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
 				    struct kvm_mp_state *mp_state);
 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
 					struct kvm_guest_debug *dbg);
+int kvm_arch_vcpu_set_guest_debug(struct kvm_vcpu *vcpu,
+				  struct kvm_guest_debug *dbg);
 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run);
 void kvm_vcpu_ioctl_x86_get_xsave(struct kvm_vcpu *vcpu,
 				  struct kvm_xsave *guest_xsave);