File 18468-therm-control-msr.patch of Package xen

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File 18468-therm-control-msr.patch of Package xen

# HG changeset patch
# User Keir Fraser <keir.fraser@citrix.com>
# Date 1221148273 -3600
# Node ID a5cc38391afb16af6bdae32c5a5f4f9a3a236987
# Parent  d8ce41b79ecc74c00797d73caa56dbdaf02bbd66
ACPI: Grant access of MSR_IA32_THERM_CONTROL MSR to dom0

The purpose is to support dom0 throttling control via MSR.

Signed-off-by: Wei Gang <gang.wei@intel.com>

Index: xen-3.3.1-testing/xen/arch/x86/traps.c
===================================================================
--- xen-3.3.1-testing.orig/xen/arch/x86/traps.c
+++ xen-3.3.1-testing/xen/arch/x86/traps.c
@@ -2160,6 +2160,12 @@ static int emulate_privileged_op(struct 
             if ( wrmsr_safe(regs->ecx, eax, edx) != 0 )
                 goto fail;
             break;
+        case MSR_IA32_THERM_CONTROL:
+            if ( boot_cpu_data.x86_vendor != X86_VENDOR_INTEL )
+                goto fail;
+            if ( wrmsr_safe(regs->ecx, eax, edx) != 0 )
+                goto fail;
+            break;
         default:
             if ( wrmsr_hypervisor_regs(regs->ecx, eax, edx) )
                 break;
@@ -2236,6 +2242,12 @@ static int emulate_privileged_op(struct 
                          MSR_IA32_MISC_ENABLE_PEBS_UNAVAIL |
                          MSR_IA32_MISC_ENABLE_XTPR_DISABLE;
             break;
+        case MSR_IA32_THERM_CONTROL:
+            if ( boot_cpu_data.x86_vendor != X86_VENDOR_INTEL )
+                goto fail;
+            if ( rdmsr_safe(regs->ecx, regs->eax, regs->edx) )
+                goto fail;
+            break;
         default:
             if ( rdmsr_hypervisor_regs(regs->ecx, &l, &h) )
             {

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File 18468-therm-control-msr.patch of Package xen

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