KVM/VMX/SVM: Move kvm_machine_check function to x86.h

Move kvm_machine_check to x86.h to avoid two exact copies
of the same function in kvm.c and svm.c.

Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Uros Bizjak <ubizjak@gmail.com>
Message-Id: <20201029135600.122392-1-ubizjak@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

arch/x86/kvm/svm/svm.c

@@ -33,7 +33,6 @@
 #include <asm/debugreg.h>
 #include <asm/kvm_para.h>
 #include <asm/irq_remapping.h>
-#include <asm/mce.h>
 #include <asm/spec-ctrl.h>
 #include <asm/cpu_device_id.h>
 
@@ -1933,25 +1932,6 @@ static bool is_erratum_383(void)
 	return true;
 }
 
-/*
- * Trigger machine check on the host. We assume all the MSRs are already set up
- * by the CPU and that we still run on the same CPU as the MCE occurred on.
- * We pass a fake environment to the machine check handler because we want
- * the guest to be always treated like user space, no matter what context
- * it used internally.
- */
-static void kvm_machine_check(void)
-{
-#if defined(CONFIG_X86_MCE)
-	struct pt_regs regs = {
-		.cs = 3, /* Fake ring 3 no matter what the guest ran on */
-		.flags = X86_EFLAGS_IF,
-	};
-
-	do_machine_check(&regs);
-#endif
-}
-
 static void svm_handle_mce(struct vcpu_svm *svm)
 {
 	if (is_erratum_383()) {

arch/x86/kvm/vmx/vmx.c

@@ -40,7 +40,6 @@
 #include <asm/irq_remapping.h>
 #include <asm/kexec.h>
 #include <asm/perf_event.h>
-#include <asm/mce.h>
 #include <asm/mmu_context.h>
 #include <asm/mshyperv.h>
 #include <asm/mwait.h>
@@ -4716,25 +4715,6 @@ static int handle_rmode_exception(struct kvm_vcpu *vcpu,
 	return 1;
 }
 
-/*
- * Trigger machine check on the host. We assume all the MSRs are already set up
- * by the CPU and that we still run on the same CPU as the MCE occurred on.
- * We pass a fake environment to the machine check handler because we want
- * the guest to be always treated like user space, no matter what context
- * it used internally.
- */
-static void kvm_machine_check(void)
-{
-#if defined(CONFIG_X86_MCE)
-	struct pt_regs regs = {
-		.cs = 3, /* Fake ring 3 no matter what the guest ran on */
-		.flags = X86_EFLAGS_IF,
-	};
-
-	do_machine_check(&regs);
-#endif
-}
-
 static int handle_machine_check(struct kvm_vcpu *vcpu)
 {
 	/* handled by vmx_vcpu_run() */

arch/x86/kvm/x86.h

@@ -3,6 +3,7 @@
 #define ARCH_X86_KVM_X86_H
 
 #include <linux/kvm_host.h>
+#include <asm/mce.h>
 #include <asm/pvclock.h>
 #include "kvm_cache_regs.h"
 #include "kvm_emulate.h"
@@ -366,6 +367,25 @@ static inline bool kvm_dr6_valid(u64 data)
 	return !(data >> 32);
 }
 
+/*
+ * Trigger machine check on the host. We assume all the MSRs are already set up
+ * by the CPU and that we still run on the same CPU as the MCE occurred on.
+ * We pass a fake environment to the machine check handler because we want
+ * the guest to be always treated like user space, no matter what context
+ * it used internally.
+ */
+static inline void kvm_machine_check(void)
+{
+#if defined(CONFIG_X86_MCE)
+	struct pt_regs regs = {
+		.cs = 3, /* Fake ring 3 no matter what the guest ran on */
+		.flags = X86_EFLAGS_IF,
+	};
+
+	do_machine_check(&regs);
+#endif
+}
+
 void kvm_load_guest_xsave_state(struct kvm_vcpu *vcpu);
 void kvm_load_host_xsave_state(struct kvm_vcpu *vcpu);
 int kvm_spec_ctrl_test_value(u64 value);