[PATCH] Enable cpuid performance counter leaf for HVM

[PATCH] Enable cpuid performance counter leaf for HVM

[Juergen Gross]

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In HVM domains the usable performance counters can be checked automatically
only, if cpuid leaf 0x0000000a is accessible.

Signed-off-by: juergen.gross@ts.fujitsu.com


1 file changed, 1 insertion(+)
tools/libxc/xc_cpuid_x86.c |    1 +



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# HG changeset patch
# User Juergen Gross <juergen.gross@ts.fujitsu.com>
# Date 1315488544 -7200
# Node ID 8244f714acf1cc2bc08517a34dc241380f9648e6
# Parent  bdd19847ae63b5dfb036e228cb16ec3ae678e995
Enable cpuid performance counter leaf for HVM

In HVM domains the usable performance counters can be checked automatically
only, if cpuid leaf 0x0000000a is accessible.

Signed-off-by: juergen.gross@ts.fujitsu.com

diff -r bdd19847ae63 -r 8244f714acf1 tools/libxc/xc_cpuid_x86.c
--- a/tools/libxc/xc_cpuid_x86.c	Wed Sep 07 10:37:48 2011 +0100
+++ b/tools/libxc/xc_cpuid_x86.c	Thu Sep 08 15:29:04 2011 +0200
@@ -392,6 +392,7 @@ static void xc_cpuid_hvm_policy(
 
     case 0x00000002: /* Intel cache info (dumped by AMD policy) */
     case 0x00000004: /* Intel cache info (dumped by AMD policy) */
+    case 0x0000000a: /* Architectural Performance Monitor Features */
     case 0x80000002: /* Processor name string */
     case 0x80000003: /* ... continued         */
     case 0x80000004: /* ... continued         */

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Re: [PATCH] Enable cpuid performance counter leaf for HVM

[Ian Jackson]

Juergen Gross writes ("[Xen-devel] [PATCH] Enable cpuid performance counter leaf for HVM"):
> In HVM domains the usable performance counters can be checked automatically
> only, if cpuid leaf 0x0000000a is accessible.
> 
> Signed-off-by: juergen.gross@ts.fujitsu.com

Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>

Ian.