[Xen-changelog] [xen master] x86/VPMU: make vpmu macros a bit more efficient

[patchbot@xxxxxxx]

commit c71b23096966fd60726ed4f4e7ae1469f10bbe64
Author:     Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>
AuthorDate: Fri Jan 23 17:51:43 2015 +0100
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Fri Jan 23 17:51:43 2015 +0100

    x86/VPMU: make vpmu macros a bit more efficient
    
    Introduce vpmu_are_all_set that allows testing multiple bits at once. 
Convert macros
    into inlines for better compiler checking.
    
    Signed-off-by: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>
    Acked-by: Kevin Tian <kevin.tian@xxxxxxxxx>
    Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
    Reviewed-by: Dietmar Hahn <dietmar.hahn@xxxxxxxxxxxxxx>
    Tested-by: Dietmar Hahn <dietmar.hahn@xxxxxxxxxxxxxx>
---
 xen/arch/x86/hvm/vmx/vpmu_core2.c |    5 +----
 xen/arch/x86/hvm/vpmu.c           |    3 +--
 xen/include/asm-x86/hvm/vpmu.h    |   25 +++++++++++++++++++++----
 3 files changed, 23 insertions(+), 10 deletions(-)

diff --git a/xen/arch/x86/hvm/vmx/vpmu_core2.c 
b/xen/arch/x86/hvm/vmx/vpmu_core2.c
index c9fb202..951aece 100644
--- a/xen/arch/x86/hvm/vmx/vpmu_core2.c
+++ b/xen/arch/x86/hvm/vmx/vpmu_core2.c
@@ -326,10 +326,7 @@ static int core2_vpmu_save(struct vcpu *v)
 {
     struct vpmu_struct *vpmu = vcpu_vpmu(v);
 
-    if ( !vpmu_is_set(vpmu, VPMU_CONTEXT_SAVE) )
-        return 0;
-
-    if ( !vpmu_is_set(vpmu, VPMU_CONTEXT_LOADED) ) 
+    if ( !vpmu_are_all_set(vpmu, VPMU_CONTEXT_SAVE | VPMU_CONTEXT_LOADED) )
         return 0;
 
     __core2_vpmu_save(v);
diff --git a/xen/arch/x86/hvm/vpmu.c b/xen/arch/x86/hvm/vpmu.c
index e17e194..63b2158 100644
--- a/xen/arch/x86/hvm/vpmu.c
+++ b/xen/arch/x86/hvm/vpmu.c
@@ -143,8 +143,7 @@ void vpmu_save(struct vcpu *v)
     struct vpmu_struct *vpmu = vcpu_vpmu(v);
     int pcpu = smp_processor_id();
 
-    if ( !(vpmu_is_set(vpmu, VPMU_CONTEXT_ALLOCATED) &&
-           vpmu_is_set(vpmu, VPMU_CONTEXT_LOADED)) )
+    if ( !vpmu_are_all_set(vpmu, VPMU_CONTEXT_ALLOCATED | VPMU_CONTEXT_LOADED) 
)
        return;
 
     vpmu->last_pcpu = pcpu;
diff --git a/xen/include/asm-x86/hvm/vpmu.h b/xen/include/asm-x86/hvm/vpmu.h
index 1f28bd8..ddc2748 100644
--- a/xen/include/asm-x86/hvm/vpmu.h
+++ b/xen/include/asm-x86/hvm/vpmu.h
@@ -82,10 +82,27 @@ struct vpmu_struct {
 #define VPMU_CPU_HAS_BTS                    0x200 /* Has Branch Trace Store */
 
 
-#define vpmu_set(_vpmu, _x)    ((_vpmu)->flags |= (_x))
-#define vpmu_reset(_vpmu, _x)  ((_vpmu)->flags &= ~(_x))
-#define vpmu_is_set(_vpmu, _x) ((_vpmu)->flags & (_x))
-#define vpmu_clear(_vpmu)      ((_vpmu)->flags = 0)
+static inline void vpmu_set(struct vpmu_struct *vpmu, const u32 mask)
+{
+    vpmu->flags |= mask;
+}
+static inline void vpmu_reset(struct vpmu_struct *vpmu, const u32 mask)
+{
+    vpmu->flags &= ~mask;
+}
+static inline void vpmu_clear(struct vpmu_struct *vpmu)
+{
+    vpmu->flags = 0;
+}
+static inline bool_t vpmu_is_set(const struct vpmu_struct *vpmu, const u32 
mask)
+{
+    return !!(vpmu->flags & mask);
+}
+static inline bool_t vpmu_are_all_set(const struct vpmu_struct *vpmu,
+                                      const u32 mask)
+{
+    return !!((vpmu->flags & mask) == mask);
+}
 
 int vpmu_do_wrmsr(unsigned int msr, uint64_t msr_content, uint64_t supported);
 int vpmu_do_rdmsr(unsigned int msr, uint64_t *msr_content);
--
generated by git-patchbot for /home/xen/git/xen.git#master

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