Relocate KVM's TASK_SWITCH_<reason> enums from kvm_host.h to x86.h, as the
enums are arbitrary values, i.e. not architectural, and are intended to be
used only to translate vendor specific information to a common x86 reason
when invoking kvm_task_switch().

Opportunistically name the overall enum to help document the role of the
values.

No functional change intended.

Signed-off-by: Sean Christopherson <seanjc@google.com>
---
 arch/x86/include/asm/kvm_host.h | 7 -------
 arch/x86/kvm/x86.h              | 6 ++++++
 2 files changed, 6 insertions(+), 7 deletions(-)

diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index f24e0de00692..c7d53d46763b 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -1960,13 +1960,6 @@ static inline unsigned long read_msr(unsigned long msr)
 }
 #endif
 
-enum {
-	TASK_SWITCH_CALL = 0,
-	TASK_SWITCH_IRET = 1,
-	TASK_SWITCH_JMP = 2,
-	TASK_SWITCH_GATE = 3,
-};
-
 #define HF_GUEST_MASK		(1 << 0) /* VCPU is in guest-mode */
 
 #ifdef CONFIG_KVM_SMM
diff --git a/arch/x86/kvm/x86.h b/arch/x86/kvm/x86.h
index 8ece468087a8..494d97e9a9c9 100644
--- a/arch/x86/kvm/x86.h
+++ b/arch/x86/kvm/x86.h
@@ -482,6 +482,12 @@ int kvm_emulate_wbinvd(struct kvm_vcpu *vcpu);
 
 void kvm_vcpu_deliver_sipi_vector(struct kvm_vcpu *vcpu, u8 vector);
 
+enum kvm_task_switch_reason {
+	TASK_SWITCH_CALL = 0,
+	TASK_SWITCH_IRET = 1,
+	TASK_SWITCH_JMP = 2,
+	TASK_SWITCH_GATE = 3,
+};
 int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int idt_index,
 		    int reason, bool has_error_code, u32 error_code);
 
-- 
2.55.0.rc0.799.gd6f94ed593-goog