[Xen-API] [PATCH] Add Cpuid.features_mask function.

[Rob Hoes <rob.hoes@xxxxxxxxxx>]

# HG changeset patch
# User Rob Hoes <rob.hoes@xxxxxxxxxx>
Add Cpuid.features_mask function.

Signed-off-by: Rob Hoes <rob.hoes@xxxxxxxxxx>

diff -r 9ab11f4a89f1 cpuid/cpuid.ml
--- a/cpuid/cpuid.ml    Wed Mar 17 11:15:44 2010 +0000
+++ b/cpuid/cpuid.ml    Fri Mar 19 10:01:00 2010 +0000
@@ -179,6 +179,14 @@
        
 (* === Masking checks === *)
 
+let mask_features features mask =
+       {
+               base_ecx = logand features.base_ecx mask.base_ecx;
+               base_edx = logand features.base_edx mask.base_edx;
+               ext_ecx = logand features.ext_ecx mask.ext_ecx;
+               ext_edx = logand features.ext_edx mask.ext_edx;
+       }
+
 let assert_maskability cpu manufacturer features = 
        (* Manufacturers need to be the same *)
        if manufacturer != cpu.manufacturer then 
diff -r 9ab11f4a89f1 cpuid/cpuid.mli
--- a/cpuid/cpuid.mli   Wed Mar 17 11:15:44 2010 +0000
+++ b/cpuid/cpuid.mli   Fri Mar 19 10:01:00 2010 +0000
@@ -54,8 +54,11 @@
 
 (** {2 Masking Checks} *)
 
-(** Check that this CPU can be masked to fit the pool. Raises {!CannotMaskCpu} 
- *  including a reason string if this is not possible. *)
+(** Apply a mask to given features. *)
+val mask_features : features -> features -> features
+
+(** Check that this CPU can be masked to fit the pool. Raises exception
+ *  indicating the reason if this is not possible. *)
 val assert_maskability : cpu_info -> manufacturer -> features -> unit
 
 (** Return the CPU masking string to add to the Xen command-line,

Attachment: cpuid-mask
Description: Text document

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