Add support for rsmi_dev_memory_reserved_pages_get()

Also, don't return an error for empty sysfs files. The reserved memory
page file will often have no lines. We don't want it to appear that
this function is not supported if the file is empty.

Change-Id: I1d28bb184ea587bb578fe71dd75adc2a812d09a8

src/rocm_smi_device.cc

@@ -91,6 +91,7 @@ static const char *kDevErrCntSDMAFName = "ras/sdma_err_count";
 static const char *kDevErrCntUMCFName = "ras/umc_err_count";
 static const char *kDevErrCntGFXFName = "ras/gfx_err_count";
 static const char *kDevErrCntFeaturesFName = "ras/features";
+static const char *kDevMemPageBadFName = "ras/gpu_vram_bad_pages";
 static const char *kDevMemTotGTTFName = "mem_info_gtt_total";
 static const char *kDevMemTotVisVRAMFName = "mem_info_vis_vram_total";
 static const char *kDevMemTotVRAMFName = "mem_info_vram_total";
@@ -194,6 +195,7 @@ static const std::map<DevInfoTypes, const char *> kDevAttribNameMap = {
     {kDevFwVersionVce, kDevFwVersionVceFName},
     {kDevFwVersionVcn, kDevFwVersionVcnFName},
     {kDevSerialNumber, kDevSerialNumberFName},
+    {kDevMemPageBad, kDevMemPageBadFName},
 };
 
 static const std::map<rsmi_dev_perf_level, const char *> kDevPerfLvlMap = {
@@ -394,7 +396,7 @@ int Device::readDevInfoMultiLineStr(DevInfoTypes type,
   }
 
   if (retVec->size() == 0) {
-    return EPERM;
+    return 0;
   }
   // Remove any *trailing* empty (whitespace) lines
   while (retVec->back().find_first_not_of(" \t\n\v\f\r") == std::string::npos) {
@@ -484,6 +486,7 @@ int Device::readDevInfo(DevInfoTypes type, std::vector<std::string> *val) {
     case kDevErrCntUMC:
     case kDevErrCntGFX:
     case kDevErrCntFeatures:
+    case kDevMemPageBad:
       return readDevInfoMultiLineStr(type, val);
       break;