[xen staging] x86/shadow: the trace_emul_write_val() hook is HVM-only

[patchbot@xxxxxxx]

commit e55c9b25349c133a333b7b827d3b4645a84b5846
Author:     Jan Beulich <jbeulich@xxxxxxxx>
AuthorDate: Tue Apr 21 11:02:36 2020 +0200
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Tue Apr 21 11:02:36 2020 +0200

    x86/shadow: the trace_emul_write_val() hook is HVM-only
    
    Its only caller lives in HVM-only code, and the only caller of
    trace_shadow_emulate() also already site in a HVM-only code section.
    
    Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
    Acked-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
    Acked-by: Tim Deegan <tim@xxxxxxx>
---
 xen/arch/x86/mm/shadow/multi.c | 4 +++-
 xen/include/asm-x86/paging.h   | 2 +-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/xen/arch/x86/mm/shadow/multi.c b/xen/arch/x86/mm/shadow/multi.c
index 16bb6f3e8a..2851aa0407 100644
--- a/xen/arch/x86/mm/shadow/multi.c
+++ b/xen/arch/x86/mm/shadow/multi.c
@@ -2694,6 +2694,7 @@ static inline void trace_shadow_emulate_other(u32 event,
     }
 }
 
+#ifdef CONFIG_HVM
 #if GUEST_PAGING_LEVELS == 3
 static DEFINE_PER_CPU(guest_va_t,trace_emulate_initial_va);
 static DEFINE_PER_CPU(int,trace_extra_emulation_count);
@@ -2745,6 +2746,7 @@ static inline void trace_shadow_emulate(guest_l1e_t gl1e, 
unsigned long va)
         __trace_var(event, 0/*!tsc*/, sizeof(d), &d);
     }
 }
+#endif /* CONFIG_HVM */
 
 /**************************************************************************/
 /* Entry points into the shadow code */
@@ -4896,8 +4898,8 @@ const struct paging_mode sh_paging_mode = {
     .shadow.guess_wrmap            = sh_guess_wrmap,
 #endif
     .shadow.pagetable_dying        = sh_pagetable_dying,
-#endif /* CONFIG_HVM */
     .shadow.trace_emul_write_val   = trace_emulate_write_val,
+#endif /* CONFIG_HVM */
     .shadow.shadow_levels          = SHADOW_PAGING_LEVELS,
 };
 
diff --git a/xen/include/asm-x86/paging.h b/xen/include/asm-x86/paging.h
index 5243de7312..f53575f3d9 100644
--- a/xen/include/asm-x86/paging.h
+++ b/xen/include/asm-x86/paging.h
@@ -108,10 +108,10 @@ struct shadow_paging_mode {
     int           (*guess_wrmap           )(struct vcpu *v, 
                                             unsigned long vaddr, mfn_t gmfn);
     void          (*pagetable_dying       )(paddr_t gpa);
-#endif
     void          (*trace_emul_write_val  )(const void *ptr, unsigned long 
vaddr,
                                             const void *src, unsigned int 
bytes);
 #endif
+#endif
     /* For outsiders to tell what mode we're in */
     unsigned int shadow_levels;
 };
--
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