[Xen-devel] [cpufreq][PATCH][1/2] Xen support for architectural pstate driver

["Mark Langsdorf" <mark.langsdorf@xxxxxxx>]

With the third generation Opteron parts, AMD switched to an
architecturally defined interface for PowerNow! that uses
different MSRs than previous versions.

Add support in msr-index.h and traps.c for the new interface.

Signed-off-by: Mark Langsdorf <mark.langsdorf@xxxxxxx>

iff -r 650cadd1b283 xen/arch/x86/traps.c
--- a/xen/arch/x86/traps.c      Fri Nov 02 16:38:11 2007 +0000
+++ b/xen/arch/x86/traps.c      Fri Nov 02 16:40:14 2007 -0500
@@ -1845,6 +1845,17 @@ static int emulate_privileged_op(struct 
 #endif
         case MSR_K7_FID_VID_STATUS:
         case MSR_K7_FID_VID_CTL:
+        case MSR_K8_PSTATE_LIMIT:
+        case MSR_K8_PSTATE_CTRL:
+        case MSR_K8_PSTATE_STATUS:
+        case MSR_K8_PSTATE0:
+        case MSR_K8_PSTATE1:
+        case MSR_K8_PSTATE2:
+        case MSR_K8_PSTATE3:
+        case MSR_K8_PSTATE4:
+        case MSR_K8_PSTATE5:
+        case MSR_K8_PSTATE6:
+        case MSR_K8_PSTATE7:
             if ( (cpufreq_controller != FREQCTL_dom0_kernel) ||
                  (boot_cpu_data.x86_vendor != X86_VENDOR_AMD) ||
                  wrmsr_safe(regs->ecx, eax, edx) )
@@ -1897,6 +1908,17 @@ static int emulate_privileged_op(struct 
 #endif
         case MSR_K7_FID_VID_CTL:
         case MSR_K7_FID_VID_STATUS:
+        case MSR_K8_PSTATE_LIMIT:
+        case MSR_K8_PSTATE_CTRL:
+        case MSR_K8_PSTATE_STATUS:
+        case MSR_K8_PSTATE0:
+        case MSR_K8_PSTATE1:
+        case MSR_K8_PSTATE2:
+        case MSR_K8_PSTATE3:
+        case MSR_K8_PSTATE4:
+        case MSR_K8_PSTATE5:
+        case MSR_K8_PSTATE6:
+        case MSR_K8_PSTATE7:
             if ( (cpufreq_controller != FREQCTL_dom0_kernel) ||
                  (boot_cpu_data.x86_vendor != X86_VENDOR_AMD) ||
                  rdmsr_safe(regs->ecx, regs->eax, regs->edx) )
diff -r 650cadd1b283 xen/include/asm-x86/msr-index.h
--- a/xen/include/asm-x86/msr-index.h   Fri Nov 02 16:38:11 2007 +0000
+++ b/xen/include/asm-x86/msr-index.h   Fri Nov 02 16:40:14 2007 -0500
@@ -165,6 +165,17 @@
 #define MSR_K8_HWCR                    0xc0010015
 #define MSR_K7_FID_VID_CTL             0xc0010041
 #define MSR_K7_FID_VID_STATUS          0xc0010042
+#define MSR_K8_PSTATE_LIMIT            0xc0010061
+#define MSR_K8_PSTATE_CTRL             0xc0010062
+#define MSR_K8_PSTATE_STATUS           0xc0010063
+#define MSR_K8_PSTATE0                 0xc0010064
+#define MSR_K8_PSTATE1                 0xc0010065
+#define MSR_K8_PSTATE2                 0xc0010066
+#define MSR_K8_PSTATE3                 0xc0010067
+#define MSR_K8_PSTATE4                 0xc0010068
+#define MSR_K8_PSTATE5                 0xc0010069
+#define MSR_K8_PSTATE6                 0xc001006A
+#define MSR_K8_PSTATE7                 0xc001006B
 #define MSR_K8_ENABLE_C1E              0xc0010055
 #define MSR_K8_VM_CR                   0xc0010114
 #define MSR_K8_VM_HSAVE_PA             0xc0010117



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