Merge branches 'pm-cpufreq', 'pm-cpuidle', 'pm-devfreq', 'pm-opp' and 'pm-tools'

[linux-drm-fsl-dcu.git] / arch / x86 / kernel / cpu / amd.c

diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c
index 15c5df92f74ec84a1861ac521fb8f4a9d2895dea..a220239cea65ca99b3c52ebbfaed6ce973f0dec1 100644 (file)
--- a/arch/x86/kernel/cpu/amd.c
+++ b/arch/x86/kernel/cpu/amd.c
@@ -869,3 +869,22 @@ static bool cpu_has_amd_erratum(struct cpuinfo_x86 *cpu, const int *erratum)
 
        return false;
 }
+
+void set_dr_addr_mask(unsigned long mask, int dr)
+{
+       if (!cpu_has_bpext)
+               return;
+
+       switch (dr) {
+       case 0:
+               wrmsr(MSR_F16H_DR0_ADDR_MASK, mask, 0);
+               break;
+       case 1:
+       case 2:
+       case 3:
+               wrmsr(MSR_F16H_DR1_ADDR_MASK - 1 + dr, mask, 0);
+               break;
+       default:
+               break;
+       }
+}