[RFC PATCH v4 10/18] kvm: x86: handle the new vCPU request (KVM_REQ_INTROSPECTION)

["Adalber Lazăr" <alazar@bitdefender.com>]

From: Adalbert Lazar <alazar@bitdefender.com>

The thread/worker receiving vCPU commands (from the guest introspection
tool) signals the vCPU by placing the command in a vCPU buffer, sets this
vCPU request bit and kicks the vCPU.

This patch adds the call to the introspection handler that will:
 - execute the command
 - send the results back to the introspection tool
 - pause the vCPU (if requested)

Signed-off-by: Adalbert Lazăr <alazar@bitdefender.com>
---
 arch/x86/kvm/x86.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index cdfc7200a018..9889e96f64e6 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -20,6 +20,7 @@
  */
 
 #include <linux/kvm_host.h>
+#include <linux/kvmi.h>
 #include "irq.h"
 #include "mmu.h"
 #include "i8254.h"
@@ -6904,6 +6905,9 @@ static int vcpu_enter_guest(struct kvm_vcpu *vcpu)
 		 */
 		if (kvm_check_request(KVM_REQ_HV_STIMER, vcpu))
 			kvm_hv_process_stimers(vcpu);
+
+		if (kvm_check_request(KVM_REQ_INTROSPECTION, vcpu))
+			kvmi_handle_request(vcpu);
 	}
 
 	if (kvm_check_request(KVM_REQ_EVENT, vcpu) || req_int_win) {

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