[v3,07/11] KVM: x86: Add util for getting current vCPU running on CPU

Commit Message

Liran Alon Dec. 24, 2017, 4:12 p.m. UTC

This commit doesn't change semantics.
It is done as a preparation for future commits.

Signed-off-by: Liran Alon <[e-mail]>
Reviewed-by: Nikita Leshenko <[e-mail]>
Reviewed-by: Liam Merwick <[e-mail]>
Signed-off-by: Liam Merwick <[e-mail]>
---
 arch/x86/include/asm/kvm_host.h | 1 +
 arch/x86/kvm/x86.c              | 6 ++++++
 2 files changed, 7 insertions(+)

Patch

diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index 516798431328..90c54d079bc1 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -1408,6 +1408,7 @@  void kvm_arch_async_page_ready(struct kvm_vcpu *vcpu,
 int kvm_skip_emulated_instruction(struct kvm_vcpu *vcpu);
 int kvm_complete_insn_gp(struct kvm_vcpu *vcpu, int err);
 
+struct kvm_vcpu *kvm_get_current_vcpu(void);
 int kvm_is_in_guest(void);
 
 int __x86_set_memory_region(struct kvm *kvm, int id, gpa_t gpa, u32 size);
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index ccc5a10eff3d..fc08f2cb7aa2 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -6010,6 +6010,12 @@  static void kvm_timer_init(void)
 
 static DEFINE_PER_CPU(struct kvm_vcpu *, current_vcpu);
 
+struct kvm_vcpu *kvm_get_current_vcpu(void)
+{
+	return __this_cpu_read(current_vcpu);
+}
+EXPORT_SYMBOL_GPL(kvm_get_current_vcpu);
+
 int kvm_is_in_guest(void)
 {
 	return __this_cpu_read(current_vcpu) != NULL;