[PATCH 0/1] MR2710: ntdll: Implement efficiency class reporting for intel hybrid CPUs.

[Torge Matthies (＠tmatthies)]

Signed-off-by: Torge Matthies

[PATCH 1/1] ntdll: Implement efficiency class reporting for intel hybrid CPUs.

[Torge Matthies]

From: Torge Matthies

Signed-off-by: Torge Matthies 
---
 dlls/ntdll/unix/system.c | 30 +++++++++++++++++++++++++++++-
 1 file changed, 29 insertions(+), 1 deletion(-)

diff --git a/dlls/ntdll/unix/system.c b/dlls/ntdll/unix/system.c
index 04755fac5ea..b78f9b3f9a7 100644
--- a/dlls/ntdll/unix/system.c
+++ b/dlls/ntdll/unix/system.c
@@ -231,6 +231,7 @@ struct smbios_chassis_args
 SYSTEM_CPU_INFORMATION cpu_info = { 0 };
 static SYSTEM_PROCESSOR_FEATURES_INFORMATION cpu_features;
 static char cpu_name[49];
+static ULONG performance_cores[1024];
 static SYSTEM_LOGICAL_PROCESSOR_INFORMATION *logical_proc_info;
 static unsigned int logical_proc_info_len, logical_proc_info_alloc_len;
 static SYSTEM_LOGICAL_PROCESSOR_INFORMATION_EX *logical_proc_info_ex;
@@ -643,7 +644,10 @@ static BOOL logical_proc_info_ex_add_by_id( LOGICAL_PROCESSOR_RELATIONSHIP rel,
         dataex->u.Processor.Flags = count_bits( mask ) > 1 ? LTP_PC_SMT : 0;
     else
         dataex->u.Processor.Flags = 0;
-    dataex->u.Processor.EfficiencyClass = 0;
+    if (rel == RelationProcessorCore && id < ARRAY_SIZE(performance_cores) * 32)
+        dataex->u.Processor.EfficiencyClass = (performance_cores[id / 32] >> (id & 31)) & 1;
+    else
+        dataex->u.Processor.EfficiencyClass = 0;
     dataex->u.Processor.GroupCount = 1;
     dataex->u.Processor.GroupMask[0].Mask = mask;
     dataex->u.Processor.GroupMask[0].Group = 0;
@@ -846,6 +850,28 @@ static BOOL sysfs_count_list_elements(const char *filename, unsigned int *result
     return TRUE;
 }

+static void fill_performance_core_info(void)
+{
+    FILE *fpcore_list;
+    unsigned int beg, end, i;
+    char op = ',';
+
+    if (access("/sys/devices/cpu_atom/cpus", R_OK)) return;
+
+    fpcore_list = fopen("/sys/devices/cpu_core/cpus", "r");
+    if (!fpcore_list) return;
+
+    while (!feof(fpcore_list) && op == ',')
+    {
+        if (!fscanf(fpcore_list, "%u %c ", &beg, &op)) break;
+        if (op == '-') fscanf(fpcore_list, "%u %c ", &end, &op);
+        else end = beg;
+
+        for(i = beg; i <= end; i++)
+            performance_cores[i >> 5] |= 1 << (i & 31);
+    }
+}
+
 /* for 'data', max_len is the array count. for 'dataex', max_len is in bytes */
 static NTSTATUS create_logical_proc_info(void)
 {
@@ -872,6 +898,8 @@ static NTSTATUS create_logical_proc_info(void)
                 max_cpus, MAXIMUM_PROCESSORS);
     }

+    fill_performance_core_info();
+
     fcpu_list = fopen("/sys/devices/system/cpu/online", "r");
     if (!fcpu_list) return STATUS_NOT_IMPLEMENTED;