Added RxMsr class.

src/hw/msr/Msr.cpp

@@ -55,6 +55,24 @@ std::shared_ptr<xmrig::Msr> xmrig::Msr::get()
 }
 
 
+bool xmrig::Msr::write(uint32_t reg, uint64_t value, int32_t cpu, uint64_t mask, bool verbose)
+{
+    if (mask != MsrItem::kNoMask) {
+        uint64_t old_value;
+        if (rdmsr(reg, cpu, old_value)) {
+            value = MsrItem::maskedValue(old_value, value, mask);
+        }
+    }
+
+    const bool result = wrmsr(reg, value, cpu);
+    if (!result && verbose) {
+        LOG_WARN("%s " YELLOW_BOLD("cannot set MSR 0x%08" PRIx32 " to 0x%016" PRIx64), tag(), reg, value);
+    }
+
+    return result;
+}
+
+
 xmrig::MsrItem xmrig::Msr::read(uint32_t reg, int32_t cpu, bool verbose) const
 {
     uint64_t value = 0;