Xen devel - Dec 2010 - [PATCH 1/5] vtdt: Define a new function gtsc_to_gtime()

vtdt: Define a new function gtsc_to_gtime()

Define it to do the transform from guest tsc to guest time.

Fix the typo in gtime_to_gtsc() definition.

Signed-off-by: Wei Gang <gang.wei@intel.com>

diff -r 373b7357d977 xen/arch/x86/time.c
--- a/xen/arch/x86/time.c	Thu Dec 09 22:32:43 2010 +0800
+++ b/xen/arch/x86/time.c	Thu Dec 09 22:32:51 2010 +0800
@@ -1634,11 +1634,20 @@ static void __init tsc_parse(const char 
 }
 custom_param("tsc", tsc_parse);
 
-u64 gtime_to_gtsc(struct domain *d, u64 tsc)
+u64 gtime_to_gtsc(struct domain *d, u64 time)
 {
     if ( !is_hvm_domain(d) )
-        tsc = max_t(s64, tsc - d->arch.vtsc_offset, 0);
-    return scale_delta(tsc, &d->arch.ns_to_vtsc);
+        time = max_t(s64, time - d->arch.vtsc_offset, 0);
+    return scale_delta(time, &d->arch.ns_to_vtsc);
+}
+
+u64 gtsc_to_gtime(struct domain *d, u64 tsc)
+{
+    u64 time = scale_delta(tsc, &d->arch.vtsc_to_ns);
+
+    if ( !is_hvm_domain(d) )
+        time += d->arch.vtsc_offset;
+    return time;
 }
 
 void pv_soft_rdtsc(struct vcpu *v, struct cpu_user_regs *regs, int rdtscp)
diff -r 373b7357d977 xen/include/asm-x86/time.h
--- a/xen/include/asm-x86/time.h	Thu Dec 09 22:32:43 2010 +0800
+++ b/xen/include/asm-x86/time.h	Thu Dec 09 22:32:51 2010 +0800
@@ -59,7 +59,8 @@ uint64_t tsc_ticks2ns(uint64_t ticks);
 uint64_t tsc_ticks2ns(uint64_t ticks);
 
 void pv_soft_rdtsc(struct vcpu *v, struct cpu_user_regs *regs, int rdtscp);
-u64 gtime_to_gtsc(struct domain *d, u64 tsc);
+u64 gtime_to_gtsc(struct domain *d, u64 time);
+u64 gtsc_to_gtime(struct domain *d, u64 tsc);
 
 void tsc_set_info(struct domain *d, uint32_t tsc_mode, uint64_t elapsed_nsec,
                   uint32_t gtsc_khz, uint32_t incarnation);


_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xensource.com
http://lists.xensource.com/xen-devel