File 24360-x86-pv-domU-no-PCID.patch of Package xen.854

# HG changeset patch
# User Liu, Jinsong <jinsong.liu@intel.com>
# Date 1323170884 0
# Node ID d313582d4fa2157332f1d50e599aebca36c41b3b
# Parent  a0befa32e927cc147aaee9bce42c51f53580a875
X86: Disable PCID/INVPCID for pv

This patch disable PCID/INVPCID for pv.

Signed-off-by: Liu, Jinsong <jinsong.liu@intel.com>
Committed-by: Keir Fraser <keir@xen.org>

--- a/tools/libxc/xc_cpufeature.h
+++ b/tools/libxc/xc_cpufeature.h
@@ -79,6 +79,7 @@
 #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 */
--- a/tools/libxc/xc_cpuid_x86.c
+++ b/tools/libxc/xc_cpuid_x86.c
@@ -317,6 +317,7 @@ static void xc_cpuid_pv_policy(
             clear_bit(X86_FEATURE_CX16, regs[2]);
         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]);
         clear_bit(X86_FEATURE_XSAVE, regs[2]);
         set_bit(X86_FEATURE_HYPERVISOR, regs[2]);