[Xen-changelog] [xen staging] x86/nestedhvm: provide some stubs for p2m code

[patchbot@xxxxxxx]

commit e5d6ddcd31a6113e4a3db7a235ca78770fe8f401
Author:     Wei Liu <wei.liu2@xxxxxxxxxx>
AuthorDate: Mon Aug 13 15:02:32 2018 +0100
Commit:     Wei Liu <wei.liu2@xxxxxxxxxx>
CommitDate: Sun Aug 26 11:01:03 2018 +0100

    x86/nestedhvm: provide some stubs for p2m code
    
    Make two functions static inline so that they can be referenced in p2m
    code. Check nestedhvm is enabled before calling
    nestedhvm_vmcx_flushtlb (which also has a side effect of not issuing
    unnecessary IPIs for non-nested case).
    
    While moving, reformat code and use proper boolean.
    
    Signed-off-by: Wei Liu <wei.liu2@xxxxxxxxxx>
    Acked-by: Jan Beulich <jbeulich@xxxxxxxx>
---
 xen/arch/x86/hvm/nestedhvm.c        | 21 ---------------------
 xen/arch/x86/mm/p2m.c               |  3 ++-
 xen/include/asm-x86/hvm/nestedhvm.h | 16 ++++++++++++++--
 3 files changed, 16 insertions(+), 24 deletions(-)

diff --git a/xen/arch/x86/hvm/nestedhvm.c b/xen/arch/x86/hvm/nestedhvm.c
index ab50b2ab98..bd1101987d 100644
--- a/xen/arch/x86/hvm/nestedhvm.c
+++ b/xen/arch/x86/hvm/nestedhvm.c
@@ -26,13 +26,6 @@
 
 static unsigned long *shadow_io_bitmap[3];
 
-/* Nested HVM on/off per domain */
-bool nestedhvm_enabled(const struct domain *d)
-{
-    return is_hvm_domain(d) && d->arch.hvm_domain.params &&
-        d->arch.hvm_domain.params[HVM_PARAM_NESTEDHVM];
-}
-
 /* Nested VCPU */
 bool_t
 nestedhvm_vcpu_in_guestmode(struct vcpu *v)
@@ -120,20 +113,6 @@ nestedhvm_vmcx_flushtlb(struct p2m_domain *p2m)
     cpumask_clear(p2m->dirty_cpumask);
 }
 
-bool_t
-nestedhvm_is_n2(struct vcpu *v)
-{
-    if (!nestedhvm_enabled(v->domain)
-      || nestedhvm_vmswitch_in_progress(v)
-      || !nestedhvm_paging_mode_hap(v))
-        return 0;
-
-    if (nestedhvm_vcpu_in_guestmode(v))
-        return 1;
-
-    return 0;
-}
-
 /* Common shadow IO Permission bitmap */
 
 /* There four global patterns of io bitmap each guest can
diff --git a/xen/arch/x86/mm/p2m.c b/xen/arch/x86/mm/p2m.c
index 8e9fbb5a14..1089b86505 100644
--- a/xen/arch/x86/mm/p2m.c
+++ b/xen/arch/x86/mm/p2m.c
@@ -1756,7 +1756,8 @@ p2m_flush_table_locked(struct p2m_domain *p2m)
     p2m->np2m_generation++;
 
     /* Make sure nobody else is using this p2m table */
-    nestedhvm_vmcx_flushtlb(p2m);
+    if ( nestedhvm_enabled(d) )
+        nestedhvm_vmcx_flushtlb(p2m);
 
     /* Zap the top level of the trie */
     mfn = pagetable_get_mfn(p2m_get_pagetable(p2m));
diff --git a/xen/include/asm-x86/hvm/nestedhvm.h 
b/xen/include/asm-x86/hvm/nestedhvm.h
index 47165fcb96..3c810b72f0 100644
--- a/xen/include/asm-x86/hvm/nestedhvm.h
+++ b/xen/include/asm-x86/hvm/nestedhvm.h
@@ -33,7 +33,11 @@ enum nestedhvm_vmexits {
 };
 
 /* Nested HVM on/off per domain */
-bool nestedhvm_enabled(const struct domain *d);
+static inline bool nestedhvm_enabled(const struct domain *d)
+{
+    return is_hvm_domain(d) && d->arch.hvm_domain.params &&
+        d->arch.hvm_domain.params[HVM_PARAM_NESTEDHVM];
+}
 
 /* Nested VCPU */
 int nestedhvm_vcpu_initialise(struct vcpu *v);
@@ -70,7 +74,15 @@ unsigned long *nestedhvm_vcpu_iomap_get(bool_t ioport_80, 
bool_t ioport_ed);
 
 void nestedhvm_vmcx_flushtlb(struct p2m_domain *p2m);
 
-bool_t nestedhvm_is_n2(struct vcpu *v);
+static inline bool nestedhvm_is_n2(struct vcpu *v)
+{
+    if ( !nestedhvm_enabled(v->domain) ||
+        nestedhvm_vmswitch_in_progress(v) ||
+        !nestedhvm_paging_mode_hap(v) )
+        return false;
+
+    return nestedhvm_vcpu_in_guestmode(v);
+}
 
 static inline void nestedhvm_set_cr(struct vcpu *v, unsigned int cr,
                                     unsigned long value)
--
generated by git-patchbot for /home/xen/git/xen.git#staging

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