[RFC PATCH 1/2] KVM: emulate: move init_decode_cache to emulate.c

[Bandan Das]

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

Signed-off-by: Bandan Das <b...@redhat.com>
---
 arch/x86/include/asm/kvm_emulate.h |  1 +
 arch/x86/kvm/emulate.c             | 13 +++++++++++++
 arch/x86/kvm/x86.c                 | 13 -------------
 3 files changed, 14 insertions(+), 13 deletions(-)

diff --git a/arch/x86/include/asm/kvm_emulate.h 
b/arch/x86/include/asm/kvm_emulate.h
index d085f73..ad4cca8 100644
--- a/arch/x86/include/asm/kvm_emulate.h
+++ b/arch/x86/include/asm/kvm_emulate.h
@@ -436,6 +436,7 @@ bool x86_page_table_writing_insn(struct x86_emulate_ctxt 
*ctxt);
 #define EMULATION_OK 0
 #define EMULATION_RESTART 1
 #define EMULATION_INTERCEPTED 2
+void init_decode_cache(struct x86_emulate_ctxt *ctxt);
 int x86_emulate_insn(struct x86_emulate_ctxt *ctxt);
 int emulator_task_switch(struct x86_emulate_ctxt *ctxt,
                         u16 tss_selector, int idt_index, int reason,
diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c
index 8ca292c..8e2b866 100644
--- a/arch/x86/kvm/emulate.c
+++ b/arch/x86/kvm/emulate.c
@@ -4550,6 +4550,19 @@ 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;
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 4fad05d..122410d 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -4951,19 +4951,6 @@ static void inject_emulated_exception(struct kvm_vcpu 
*vcpu)
                kvm_queue_exception(vcpu, ctxt->exception.vector);
 }
 
-static 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;
-}
-
 static void init_emulate_ctxt(struct kvm_vcpu *vcpu)
 {
        struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt;
-- 
1.8.3.1

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