From: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Date: Fri, 23 Jan 2015 16:51:43 +0000 (+0100)
Subject: x86/VPMU: make vpmu macros a bit more efficient
X-Git-Tag: archive/raspbian/4.8.0-1+rpi1~1^2~3864
X-Git-Url: https://dgit.raspbian.org/%22http:/www.example.com/cgi/%22https://%22%22/%22http:/www.example.com/cgi/%22https:/%22%22?a=commitdiff_plain;h=c71b23096966fd60726ed4f4e7ae1469f10bbe64;p=xen.git

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@oracle.com>
Acked-by: Kevin Tian <kevin.tian@intel.com>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Reviewed-by: Dietmar Hahn <dietmar.hahn@ts.fujitsu.com>
Tested-by: Dietmar Hahn <dietmar.hahn@ts.fujitsu.com>
---

diff --git a/xen/arch/x86/hvm/vmx/vpmu_core2.c b/xen/arch/x86/hvm/vmx/vpmu_core2.c
index c9fb2023f2..951aecebb4 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 e17e19459c..63b2158377 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 1f28bd85e1..ddc2748498 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);