* [PATCH] Enable cpuid performance counter leaf for HVM
@ 2011-09-08 13:29 Juergen Gross
2011-09-15 14:26 ` Ian Jackson
0 siblings, 1 reply; 2+ messages in thread
From: Juergen Gross @ 2011-09-08 13:29 UTC (permalink / raw)
To: xen-devel
[-- Attachment #1: Type: text/plain, Size: 238 bytes --]
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 +
[-- Attachment #2: xen-staging.hg.patch --]
[-- Type: text/x-patch, Size: 1018 bytes --]
# 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 */
[-- Attachment #3: Type: text/plain, Size: 138 bytes --]
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* Re: [PATCH] Enable cpuid performance counter leaf for HVM
2011-09-08 13:29 [PATCH] Enable cpuid performance counter leaf for HVM Juergen Gross
@ 2011-09-15 14:26 ` Ian Jackson
0 siblings, 0 replies; 2+ messages in thread
From: Ian Jackson @ 2011-09-15 14:26 UTC (permalink / raw)
To: Juergen Gross; +Cc: xen-devel
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.
^ permalink raw reply [flat|nested] 2+ messages in thread
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