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[Xen-changelog] [xen-4.1-testing] x86/AMD: don't set ARAT feature flag o

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Subject: [Xen-changelog] [xen-4.1-testing] x86/AMD: don't set ARAT feature flag on family F CPUs
From: Xen patchbot-4.1-testing <patchbot@xxxxxxx>
Date: Thu, 26 May 2011 00:05:25 +0100
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# HG changeset patch
# User Jan Beulich <jbeulich@xxxxxxxxxx>
# Date 1305895805 -3600
# Node ID cf1089b7d89b2b392c3b065839da7e550d08a7ca
# Parent  b2d0c08b99b5a4115c67bf2188391c59eb9dcd20
x86/AMD: don't set ARAT feature flag on family F CPUs

Following Linux commit 14fb57dccb6e1defe9f89a66f548fcb24c374c1d from
Borislav Petkov.

Signed-off-by: Jan Beulich <jbeulich@xxxxxxxxxx>
xen-unstable changeset:   23356:c8f00ee51e15
xen-unstable date:        Fri May 20 09:11:54 2011 +0100

diff -r b2d0c08b99b5 -r cf1089b7d89b xen/arch/x86/cpu/amd.c
--- a/xen/arch/x86/cpu/amd.c    Fri May 20 13:49:36 2011 +0100
+++ b/xen/arch/x86/cpu/amd.c    Fri May 20 13:50:05 2011 +0100
@@ -609,7 +609,7 @@
        /* As a rule processors have APIC timer running in deep C states */
-       if (c->x86 >= 0xf && !cpu_has_amd_erratum(c, AMD_ERRATUM_400))
+       if (c->x86 > 0xf && !cpu_has_amd_erratum(c, AMD_ERRATUM_400))
                set_bit(X86_FEATURE_ARAT, c->x86_capability);
        /* Prevent TSC drift in non single-processor, single-core platforms. */

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