[Xen-changelog] [xen-unstable] x86, Intel: Make only EST feature visible to dom0 to enable Cx-state

[Xen patchbot-unstable <patchbot-unstable@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User Keir Fraser <keir.fraser@xxxxxxxxxx>
# Date 1210065934 -3600
# Node ID 777f294e3be81a4d0825e3a9b633a8d81c37f613
# Parent  d5589865bfce91bf65c34bd56e466bf26ca4176f
x86, Intel: Make only EST feature visible to dom0 to enable Cx-state
logic. There should be no need to make MWAIT visible.
Signed-off-by: Keir Fraser <keir.fraser@xxxxxxxxxx>
---
 xen/arch/x86/traps.c |    8 +++-----
 1 files changed, 3 insertions(+), 5 deletions(-)

diff -r d5589865bfce -r 777f294e3be8 xen/arch/x86/traps.c
--- a/xen/arch/x86/traps.c      Tue May 06 10:19:10 2008 +0100
+++ b/xen/arch/x86/traps.c      Tue May 06 10:25:34 2008 +0100
@@ -713,8 +713,7 @@ static int emulate_forced_invalid_op(str
         __clear_bit(X86_FEATURE_PBE, &d);
 
         __clear_bit(X86_FEATURE_DTES64 % 32, &c);
-        if ( !IS_PRIV(current->domain) )
-            __clear_bit(X86_FEATURE_MWAIT % 32, &c);
+        __clear_bit(X86_FEATURE_MWAIT % 32, &c);
         __clear_bit(X86_FEATURE_DSCPL % 32, &c);
         __clear_bit(X86_FEATURE_VMXE % 32, &c);
         __clear_bit(X86_FEATURE_SMXE % 32, &c);
@@ -2148,9 +2147,8 @@ static int emulate_privileged_op(struct 
         case MSR_IA32_MISC_ENABLE:
             if ( rdmsr_safe(regs->ecx, regs->eax, regs->edx) )
                 goto fail;
-            regs->eax &= ~MSR_IA32_MISC_ENABLE_PERF_AVAIL;
-            if ( !IS_PRIV(current->domain) )
-                regs->eax &= ~MSR_IA32_MISC_ENABLE_MONITOR_ENABLE;
+            regs->eax &= ~(MSR_IA32_MISC_ENABLE_PERF_AVAIL |
+                           MSR_IA32_MISC_ENABLE_MONITOR_ENABLE);
             regs->eax |= MSR_IA32_MISC_ENABLE_BTS_UNAVAIL |
                          MSR_IA32_MISC_ENABLE_PEBS_UNAVAIL |
                          MSR_IA32_MISC_ENABLE_XTPR_DISABLE;

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