[Xen-changelog] [xen-unstable] Intel: Add CPUID feature mask support for NHM processors.

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

# HG changeset patch
# User Keir Fraser <keir.fraser@xxxxxxxxxx>
# Date 1275643111 -3600
# Node ID 48e2b07cf01c044bf483bd7fa5408a6f9801416b
# Parent  f2b1924f20281bc42fa3532c7d82b3ee0700aff4
Intel: Add CPUID feature mask support for NHM processors.

Signed-off-by: Jun Nakajima <jun.nakajima@xxxxxxxxx>
Signed-off-by: Liping Ke <liping.ke@xxxxxxxxx>
---
 xen/arch/x86/cpu/intel.c        |   55 +++++++++++++++++++++++++++++-----------
 xen/include/asm-x86/msr-index.h |    2 +
 2 files changed, 42 insertions(+), 15 deletions(-)

diff -r f2b1924f2028 -r 48e2b07cf01c xen/arch/x86/cpu/intel.c
--- a/xen/arch/x86/cpu/intel.c  Fri Jun 04 10:17:19 2010 +0100
+++ b/xen/arch/x86/cpu/intel.c  Fri Jun 04 10:18:31 2010 +0100
@@ -29,6 +29,9 @@ static unsigned int opt_cpuid_mask_ecx, 
 static unsigned int opt_cpuid_mask_ecx, opt_cpuid_mask_edx;
 integer_param("cpuid_mask_ecx", opt_cpuid_mask_ecx);
 integer_param("cpuid_mask_edx", opt_cpuid_mask_edx);
+static unsigned int opt_cpuid_mask_ext_ecx, opt_cpuid_mask_ext_edx;
+integer_param("cpuid_mask_ext_ecx", opt_cpuid_mask_ext_ecx);
+integer_param("cpuid_mask_ext_edx", opt_cpuid_mask_ext_edx);
 
 static int use_xsave = 1;
 boolean_param("xsave", use_xsave);
@@ -40,24 +43,46 @@ struct movsl_mask movsl_mask __read_most
 struct movsl_mask movsl_mask __read_mostly;
 #endif
 
-static void __devinit set_cpuidmask(void)
-{
-       unsigned int eax, ebx, ecx, edx, model;
-
-       if (!(opt_cpuid_mask_ecx | opt_cpuid_mask_edx))
-               return;
-
-       cpuid(0x00000001, &eax, &ebx, &ecx, &edx);
-       model = ((eax & 0xf0000) >> 12) | ((eax & 0xf0) >> 4);
-       if (!((model == 0x1d) || ((model == 0x17) && ((eax & 0xf) >= 4)))) {
+static void __devinit set_cpuidmask(struct cpuinfo_x86 *c)
+{
+       unsigned int model = c->x86_model;
+
+       if (!(opt_cpuid_mask_ecx | opt_cpuid_mask_edx | 
+             opt_cpuid_mask_ext_ecx | opt_cpuid_mask_ext_edx))
+               return;
+
+       if (c->x86 != 0x6)      /* Only family 6 supports this feature  */
+               return;
+
+       if ((model == 0x1d) || ((model == 0x17) && (c->x86_mask >= 4))) {
+               wrmsr(MSR_IA32_CPUID_FEATURE_MASK1,
+                     opt_cpuid_mask_ecx ? : ~0u,
+                     opt_cpuid_mask_edx ? : ~0u);
+       }
+/* 
+ * CPU supports this feature if the processor signature meets the following:
+ * (CPUID.(EAX=01h):EAX) > 000106A2h, or
+ * (CPUID.(EAX=01h):EAX) == 000106Exh, 0002065xh, 000206Cxh, 000206Exh, or 
000206Fxh
+ *
+ */
+       else if (((model == 0x1a) && (c->x86_mask > 2))
+                || model == 0x1e
+                || model == 0x25 
+                || model == 0x2c 
+                || model == 0x2e 
+                || model == 0x2f) {
+               wrmsr(MSR_IA32_CPUID1_FEATURE_MASK,
+                     opt_cpuid_mask_ecx ? : ~0u,
+                     opt_cpuid_mask_edx ? : ~0u);
+               wrmsr(MSR_IA32_CPUID80000001_FEATURE_MASK,
+                     opt_cpuid_mask_ext_ecx ? : ~0u,
+                     opt_cpuid_mask_ext_edx ? : ~0u);
+       }
+       else {
                printk(XENLOG_ERR "Cannot set CPU feature mask on CPU#%d\n",
                       smp_processor_id());
                return;
        }
-
-       wrmsr(MSR_IA32_CPUID_FEATURE_MASK1,
-             opt_cpuid_mask_ecx ? : ~0u,
-             opt_cpuid_mask_edx ? : ~0u);
 }
 
 void __devinit early_intel_workaround(struct cpuinfo_x86 *c)
@@ -179,7 +204,7 @@ static void __devinit init_intel(struct 
 
        detect_ht(c);
 
-       set_cpuidmask();
+       set_cpuidmask(c);
 
        /* Work around errata */
        Intel_errata_workarounds(c);
diff -r f2b1924f2028 -r 48e2b07cf01c xen/include/asm-x86/msr-index.h
--- a/xen/include/asm-x86/msr-index.h   Fri Jun 04 10:17:19 2010 +0100
+++ b/xen/include/asm-x86/msr-index.h   Fri Jun 04 10:18:31 2010 +0100
@@ -158,6 +158,8 @@
 
 /* MSR for cpuid feature mask */
 #define MSR_IA32_CPUID_FEATURE_MASK1   0x00000478
+#define MSR_IA32_CPUID1_FEATURE_MASK    0x00000130
+#define MSR_IA32_CPUID80000001_FEATURE_MASK 0x00000131
 
 /* MSRs & bits used for VMX enabling */
 #define MSR_IA32_VMX_BASIC                      0x480

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