From: Wei Wang2 <wei.wang2@amd.com>
To: "xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>
Subject: [PATCH] Xenoprofile: Disable IBS on 32 bit
Date: Fri, 6 Aug 2010 15:19:20 +0200 [thread overview]
Message-ID: <201008061519.20777.wei.wang2@amd.com> (raw)
[-- Attachment #1: Type: text/plain, Size: 537 bytes --]
Hi,
Extended PCI configuration space is not accessible on 32 bit systems. This
patch disables IBS feature on 32 bit to avoid IBSCTL(0x1cc) accesses.
Thanks,
Wei
Signed-off-by: Wei Wang <wei.wang2@amd.com>
--
AMD GmbH, Germany
Operating System Research Center
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Advanced Micro Devices GmbH
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Geschäftsführer: Andrew Bowd, Thomas M. McCoy, Giuliano Meroni
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Registergericht München, HRB Nr. 43632
[-- Attachment #2: ibs_fix.patch --]
[-- Type: text/x-diff, Size: 538 bytes --]
diff -r 8992134dcfd0 xen/arch/x86/oprofile/op_model_athlon.c
--- a/xen/arch/x86/oprofile/op_model_athlon.c Wed Aug 04 19:24:17 2010 +0100
+++ b/xen/arch/x86/oprofile/op_model_athlon.c Fri Aug 06 14:58:53 2010 +0200
@@ -475,6 +475,9 @@ static int init_ibs_nmi(void)
static u32 get_ibs_caps(void)
{
+#ifdef CONFIG_X86_32
+ return 0;
+#else
unsigned int max_level;
if (!boot_cpu_has(X86_FEATURE_IBS))
@@ -491,6 +494,7 @@ static u32 get_ibs_caps(void)
return IBS_CAPS_AVAIL;
return ibs_caps;
+#endif
}
u32 ibs_init(void)
[-- Attachment #3: Type: text/plain, Size: 138 bytes --]
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