[Xen-changelog] [xen-4.1-testing] X86: Disable PCID/INVPCID for pv

[Xen patchbot-4.1-testing <patchbot@xxxxxxx>]

# HG changeset patch
# User Liu, Jinsong <jinsong.liu@xxxxxxxxx>
# Date 1346762453 -7200
# Node ID e72c098aa73c2689f74167ff853371a184d30058
# Parent  2527617fd58c97133d4fa2b27189cc7566a77bd3
X86: Disable PCID/INVPCID for pv

This patch disable PCID/INVPCID for pv.

Signed-off-by: Liu, Jinsong <jinsong.liu@xxxxxxxxx>
xen-unstable changeset: 24360:d313582d4fa2
xen-unstable date: Tue Dec  6 11:28:04 UTC 2011
---


diff -r 2527617fd58c -r e72c098aa73c tools/libxc/xc_cpufeature.h
--- a/tools/libxc/xc_cpufeature.h       Tue Sep 04 14:32:05 2012 +0200
+++ b/tools/libxc/xc_cpufeature.h       Tue Sep 04 14:40:53 2012 +0200
@@ -96,6 +96,7 @@
 #define X86_FEATURE_CX16        (4*32+13) /* CMPXCHG16B */
 #define X86_FEATURE_XTPR       (4*32+14) /* Send Task Priority Messages */
 #define X86_FEATURE_PDCM       (4*32+15) /* Perf/Debug Capability MSR */
+#define X86_FEATURE_PCID       (4*32+17) /* Process Context ID */
 #define X86_FEATURE_DCA                (4*32+18) /* Direct Cache Access */
 #define X86_FEATURE_SSE4_1     (4*32+19) /* Streaming SIMD Extensions 4.1 */
 #define X86_FEATURE_SSE4_2     (4*32+20) /* Streaming SIMD Extensions 4.2 */
@@ -146,5 +147,6 @@
 #define X86_FEATURE_FSGSBASE   (7*32+ 0) /* {RD,WR}{FS,GS}BASE instructions */
 #define X86_FEATURE_SMEP        (7*32+ 7) /* Supervisor Mode Execution 
Protection */
 #define X86_FEATURE_ERMS        (7*32+ 9) /* Enhanced REP MOVSB/STOSB */
+#define X86_FEATURE_INVPCID     (7*32+10) /* Invalidate Process Context ID */
 
 #endif /* __LIBXC_CPUFEATURE_H */
diff -r 2527617fd58c -r e72c098aa73c tools/libxc/xc_cpuid_x86.c
--- a/tools/libxc/xc_cpuid_x86.c        Tue Sep 04 14:32:05 2012 +0200
+++ b/tools/libxc/xc_cpuid_x86.c        Tue Sep 04 14:40:53 2012 +0200
@@ -421,6 +421,7 @@ static void xc_cpuid_pv_policy(
         }
         clear_bit(X86_FEATURE_XTPR, regs[2]);
         clear_bit(X86_FEATURE_PDCM, regs[2]);
+        clear_bit(X86_FEATURE_PCID, regs[2]);
         clear_bit(X86_FEATURE_DCA, regs[2]);
         set_bit(X86_FEATURE_HYPERVISOR, regs[2]);
         break;

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