KVM: emulate: move init_decode_cache to emulate.c

Core emulator functions all belong in emulator.c,
x86 should have no knowledge of emulator internals

Signed-off-by: Bandan Das <bsd@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

1 files changed, 13 insertions, 0 deletions

diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c
index 32d3da82da2e..851315d93bf7 100644
--- a/arch/x86/kvm/emulate.c
+++ b/arch/x86/kvm/emulate.c
@@ -4534,6 +4534,19 @@ static int fastop(struct x86_emulate_ctxt *ctxt, void (*fop)(struct fastop *))
         return X86EMUL_CONTINUE;
 }
 
+void init_decode_cache(struct x86_emulate_ctxt *ctxt)
+{
+        memset(&ctxt->opcode_len, 0,
+               (void *)&ctxt->_regs - (void *)&ctxt->opcode_len);
+
+        ctxt->fetch.start = 0;
+        ctxt->fetch.end = 0;
+        ctxt->io_read.pos = 0;
+        ctxt->io_read.end = 0;
+        ctxt->mem_read.pos = 0;
+        ctxt->mem_read.end = 0;
+}
+
 int x86_emulate_insn(struct x86_emulate_ctxt *ctxt)
 {
         const struct x86_emulate_ops *ops = ctxt->ops;