File 25959-x86-TSC-adjust-expose.patch of Package xen

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File 25959-x86-TSC-adjust-expose.patch of Package xen (Revision 3ec70e18b60887e642a07638f563ca84)

Currently displaying revision 3ec70e18b60887e642a07638f563ca84 , Show latest

References: FATE#313633

# HG changeset patch
# User Liu, Jinsong <jinsong.liu@intel.com>
# Date 1348654470 -7200
# Node ID 3aa66543a51ba77cb73e8c874e2416d065426a22
# Parent  56fb977ce6eb4626a02d4a7a34e85009bb8ee3e0
x86: Expose TSC adjust to HVM guest

Intel latest SDM (17.13.3) release a new MSR CPUID.7.0.EBX[1]=1
indicates TSC_ADJUST MSR 0x3b is supported.

This patch expose it to hvm guest.

Signed-off-by: Liu, Jinsong <jinsong.liu@intel.com>
Committed-by: Jan Beulich <jbeulich@suse.com>

--- a/tools/libxc/xc_cpufeature.h
+++ b/tools/libxc/xc_cpufeature.h
@@ -128,6 +128,7 @@
 
 /* Intel-defined CPU features, CPUID level 0x00000007:0 (ebx) */
 #define X86_FEATURE_FSGSBASE     0 /* {RD,WR}{FS,GS}BASE instructions */
+#define X86_FEATURE_TSC_ADJUST   1 /* Tsc thread offset */
 #define X86_FEATURE_BMI1         3 /* 1st group bit manipulation extensions */
 #define X86_FEATURE_HLE          4 /* Hardware Lock Elision */
 #define X86_FEATURE_AVX2         5 /* AVX2 instructions */
--- a/tools/libxc/xc_cpuid_x86.c
+++ b/tools/libxc/xc_cpuid_x86.c
@@ -362,7 +362,8 @@ static void xc_cpuid_hvm_policy(
 
     case 0x00000007: /* Intel-defined CPU features */
         if ( input[1] == 0 ) {
-            regs[1] &= (bitmaskof(X86_FEATURE_BMI1) |
+            regs[1] &= (bitmaskof(X86_FEATURE_TSC_ADJUST) |
+                        bitmaskof(X86_FEATURE_BMI1) |
                         bitmaskof(X86_FEATURE_HLE)  |
                         bitmaskof(X86_FEATURE_AVX2) |
                         bitmaskof(X86_FEATURE_SMEP) |

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File 25959-x86-TSC-adjust-expose.patch of Package xen (Revision 3ec70e18b60887e642a07638f563ca84)

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