[PATCH v4 06/31] x86: move pv_emul_is_mem_write to pv/emulate.c

[Wei Liu <wei.liu2@citrix.com>]

Export it via pv/emulate.h.  In the mean time it is required to
include pv/emulate.h in x86/mm.c.

The said function will be used later by different emulation handlers
in later patches.

Signed-off-by: Wei Liu <wei.liu2@citrix.com>
---
 xen/arch/x86/mm.c         | 9 ++-------
 xen/arch/x86/pv/emulate.c | 7 +++++++
 xen/arch/x86/pv/emulate.h | 3 +++
 3 files changed, 12 insertions(+), 7 deletions(-)

diff --git a/xen/arch/x86/mm.c b/xen/arch/x86/mm.c
index 5983a56811..e0e655ac31 100644
--- a/xen/arch/x86/mm.c
+++ b/xen/arch/x86/mm.c
@@ -126,6 +126,8 @@
 #include <asm/hvm/grant_table.h>
 #include <asm/pv/grant_table.h>
 
+#include "pv/emulate.h"
+
 /* Mapping of the fixmap space needed early. */
 l1_pgentry_t __section(".bss.page_aligned") __aligned(PAGE_SIZE)
     l1_fixmap[L1_PAGETABLE_ENTRIES];
@@ -5138,13 +5140,6 @@ static int ptwr_emulated_cmpxchg(
         container_of(ctxt, struct ptwr_emulate_ctxt, ctxt));
 }
 
-static int pv_emul_is_mem_write(const struct x86_emulate_state *state,
-                                struct x86_emulate_ctxt *ctxt)
-{
-    return x86_insn_is_mem_write(state, ctxt) ? X86EMUL_OKAY
-                                              : X86EMUL_UNHANDLEABLE;
-}
-
 static const struct x86_emulate_ops ptwr_emulate_ops = {
     .read       = ptwr_emulated_read,
     .insn_fetch = ptwr_emulated_read,
diff --git a/xen/arch/x86/pv/emulate.c b/xen/arch/x86/pv/emulate.c
index 5750c7699b..1c4d6eab28 100644
--- a/xen/arch/x86/pv/emulate.c
+++ b/xen/arch/x86/pv/emulate.c
@@ -87,6 +87,13 @@ void pv_emul_instruction_done(struct cpu_user_regs *regs, unsigned long rip)
     }
 }
 
+int pv_emul_is_mem_write(const struct x86_emulate_state *state,
+                         struct x86_emulate_ctxt *ctxt)
+{
+    return x86_insn_is_mem_write(state, ctxt) ? X86EMUL_OKAY
+                                              : X86EMUL_UNHANDLEABLE;
+}
+
 /*
  * Local variables:
  * mode: C
diff --git a/xen/arch/x86/pv/emulate.h b/xen/arch/x86/pv/emulate.h
index b2b1192d48..89abbe010f 100644
--- a/xen/arch/x86/pv/emulate.h
+++ b/xen/arch/x86/pv/emulate.h
@@ -7,4 +7,7 @@ int pv_emul_read_descriptor(unsigned int sel, const struct vcpu *v,
 
 void pv_emul_instruction_done(struct cpu_user_regs *regs, unsigned long rip);
 
+int pv_emul_is_mem_write(const struct x86_emulate_state *state,
+                         struct x86_emulate_ctxt *ctxt);
+
 #endif /* __PV_EMULATE_H__ */
-- 
2.11.0


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