[v10,22/81] KVM: x86: export kvm_arch_vcpu_set_guest_debug()

Commit Message

Adalbert Lazăr Nov. 25, 2020, 9:35 a.m. UTC

From: Nicușor Cîțu <[e-mail]>

This function is needed in order to notify the introspection tool
through KVMI_VCPU_EVENT_BP events on guest breakpoints.

Signed-off-by: Nicușor Cîțu <[e-mail]>
Signed-off-by: Adalbert Lazăr <[e-mail]>
---
 arch/x86/kvm/x86.c       | 18 +++++++++++++-----
 include/linux/kvm_host.h |  2 ++
 2 files changed, 15 insertions(+), 5 deletions(-)

Patch

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 816801d6c95d..00ab76366868 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -9684,14 +9684,12 @@  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)
@@ -9737,10 +9735,20 @@  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 6d622d8bd339..2c640ea9d7ba 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -919,6 +919,8 @@  int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
 					struct kvm_guest_debug *dbg);
 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu);
+int kvm_arch_vcpu_set_guest_debug(struct kvm_vcpu *vcpu,
+				  struct kvm_guest_debug *dbg);
 
 int kvm_arch_init(void *opaque);
 void kvm_arch_exit(void);