diff --git a/dlls/kernel32/kernel32.spec b/dlls/kernel32/kernel32.spec
index 89c2511c3cf..ecfc40288f0 100644
--- a/dlls/kernel32/kernel32.spec
+++ b/dlls/kernel32/kernel32.spec
@@ -1448,6 +1448,7 @@
 @ stdcall -import SetProcessAffinityUpdateMode(long long)
 @ stdcall -import SetProcessDefaultCpuSets(ptr ptr long)
 @ stdcall SetProcessDEPPolicy(long)
+@ stdcall -import SetProcessInformation(long long ptr long)
 @ stdcall -import SetProcessMitigationPolicy(long ptr long)
 @ stdcall -import SetProcessPreferredUILanguages(long ptr ptr)
 @ stdcall -import SetProcessPriorityBoost(long long)
diff --git a/dlls/kernelbase/kernelbase.spec b/dlls/kernelbase/kernelbase.spec
index c51dbd6bc73..d679e190caa 100644
--- a/dlls/kernelbase/kernelbase.spec
+++ b/dlls/kernelbase/kernelbase.spec
@@ -1494,7 +1494,7 @@
 @ stdcall SetProcessAffinityUpdateMode(long long)
 @ stdcall SetProcessDefaultCpuSets(ptr ptr long)
 @ stdcall SetProcessGroupAffinity(long ptr ptr)
-# @ stub SetProcessInformation
+@ stdcall SetProcessInformation(long long ptr long)
 @ stdcall SetProcessMitigationPolicy(long ptr long)
 @ stdcall SetProcessPreferredUILanguages(long ptr ptr)
 @ stdcall SetProcessPriorityBoost(long long)
diff --git a/dlls/kernelbase/process.c b/dlls/kernelbase/process.c
index 32f622bdf3e..39de15066d4 100644
--- a/dlls/kernelbase/process.c
+++ b/dlls/kernelbase/process.c
@@ -691,6 +691,26 @@ BOOL WINAPI DECLSPEC_HOTPATCH CreateProcessW( const WCHAR *app_name, WCHAR *cmd_
 }
 
 
+/**********************************************************************
+ *           SetProcessInformation   (kernelbase.@)
+ */
+BOOL WINAPI SetProcessInformation( HANDLE process, PROCESS_INFORMATION_CLASS info_class, void *info, DWORD size )
+{
+    switch (info_class)
+    {
+        case ProcessMemoryPriority:
+            return set_ntstatus( NtSetInformationProcess( process, ProcessPagePriority, info, size ));
+        case ProcessPowerThrottling:
+            return set_ntstatus( NtSetInformationProcess( process, ProcessPowerThrottlingState, info, size ));
+        case ProcessLeapSecondInfo:
+            return set_ntstatus( NtSetInformationProcess( process, ProcessLeapSecondInformation, info, size ));
+        default:
+            FIXME("Unrecognized information class %d.\n", info_class);
+            return FALSE;
+    }
+}
+
+
 /*********************************************************************
  *           DuplicateHandle   (kernelbase.@)
  */
diff --git a/dlls/wow64/process.c b/dlls/wow64/process.c
index 46bd6bfec36..ea7a1beb5e3 100644
--- a/dlls/wow64/process.c
+++ b/dlls/wow64/process.c
@@ -1078,6 +1078,9 @@ NTSTATUS WINAPI wow64_NtSetInformationProcess( UINT *args )
     case ProcessDefaultHardErrorMode:   /* ULONG */
     case ProcessPriorityClass:   /* PROCESS_PRIORITY_CLASS */
     case ProcessExecuteFlags:   /* ULONG */
+    case ProcessPagePriority:   /* MEMORY_PRIORITY_INFORMATION */
+    case ProcessPowerThrottlingState:   /* PROCESS_POWER_THROTTLING_STATE */
+    case ProcessLeapSecondInformation:   /* PROCESS_LEAP_SECOND_INFO */
         return NtSetInformationProcess( handle, class, ptr, len );
 
     case ProcessAffinityMask:   /* ULONG_PTR */
diff --git a/include/ddk/wdm.h b/include/ddk/wdm.h
index bd6ddbd67c5..321b07b84fa 100644
--- a/include/ddk/wdm.h
+++ b/include/ddk/wdm.h
@@ -1943,7 +1943,7 @@ NTSTATUS  WINAPI ZwSetEvent(HANDLE,PULONG);
 NTSTATUS  WINAPI ZwSetInformationFile(HANDLE,PIO_STATUS_BLOCK,PVOID,ULONG,FILE_INFORMATION_CLASS);
 NTSTATUS  WINAPI ZwSetInformationKey(HANDLE,const int,PVOID,ULONG);
 NTSTATUS  WINAPI ZwSetInformationObject(HANDLE, OBJECT_INFORMATION_CLASS, PVOID, ULONG);
-NTSTATUS  WINAPI ZwSetInformationProcess(HANDLE,PROCESS_INFORMATION_CLASS,PVOID,ULONG);
+NTSTATUS  WINAPI ZwSetInformationProcess(HANDLE,PROCESSINFOCLASS,PVOID,ULONG);
 NTSTATUS  WINAPI ZwSetInformationThread(HANDLE,THREADINFOCLASS,LPCVOID,ULONG);
 NTSTATUS  WINAPI ZwSetIoCompletion(HANDLE,ULONG,ULONG,NTSTATUS,ULONG);
 NTSTATUS  WINAPI ZwSetLdtEntries(ULONG,ULONG,ULONG,ULONG,ULONG,ULONG);
diff --git a/include/winbase.h b/include/winbase.h
index 7ad56502566..7d7be1ae2a8 100644
--- a/include/winbase.h
+++ b/include/winbase.h
@@ -1771,6 +1771,21 @@ typedef struct _WIN32_MEMORY_RANGE_ENTRY
     SIZE_T NumberOfBytes;
 } WIN32_MEMORY_RANGE_ENTRY, *PWIN32_MEMORY_RANGE_ENTRY;
 
+typedef enum _PROCESS_INFORMATION_CLASS
+{
+    ProcessMemoryPriority,
+    ProcessMemoryExhaustionInfo,
+    ProcessAppMemoryInfo,
+    ProcessInPrivateInfo,
+    ProcessPowerThrottling,
+    ProcessReservedValue1,
+    ProcessTelemetryCoverageInfo,
+    ProcessProtectionLevelInfo,
+    ProcessLeapSecondInfo,
+    ProcessMachineTypeInfo,
+    ProcessInformationClassMax
+} PROCESS_INFORMATION_CLASS;
+
 WINBASEAPI BOOL        WINAPI ActivateActCtx(HANDLE,ULONG_PTR *);
 WINADVAPI  BOOL        WINAPI AddAccessAllowedAce(PACL,DWORD,DWORD,PSID);
 WINADVAPI  BOOL        WINAPI AddAccessAllowedAceEx(PACL,DWORD,DWORD,DWORD,PSID);
@@ -2689,6 +2704,7 @@ WINBASEAPI BOOL        WINAPI SetPriorityClass(HANDLE,DWORD);
 WINADVAPI  BOOL        WINAPI SetPrivateObjectSecurity(SECURITY_INFORMATION,PSECURITY_DESCRIPTOR,PSECURITY_DESCRIPTOR*,PGENERIC_MAPPING,HANDLE);
 WINADVAPI  BOOL        WINAPI SetPrivateObjectSecurityEx(SECURITY_INFORMATION,PSECURITY_DESCRIPTOR,PSECURITY_DESCRIPTOR*,ULONG,PGENERIC_MAPPING,HANDLE);
 WINBASEAPI BOOL        WINAPI SetProcessAffinityMask(HANDLE,DWORD_PTR);
+WINBASEAPI BOOL        WINAPI SetProcessInformation(HANDLE,PROCESS_INFORMATION_CLASS,LPVOID,DWORD);
 WINBASEAPI BOOL        WINAPI SetProcessPriorityBoost(HANDLE,BOOL);
 WINBASEAPI BOOL        WINAPI SetProcessShutdownParameters(DWORD,DWORD);
 WINBASEAPI BOOL        WINAPI SetProcessWorkingSetSize(HANDLE,SIZE_T,SIZE_T);
diff --git a/include/winternl.h b/include/winternl.h
index 3a62ff0b268..5a99827fe65 100644
--- a/include/winternl.h
+++ b/include/winternl.h
@@ -1574,12 +1574,14 @@ typedef enum _PROCESSINFOCLASS {
     ProcessConsoleHostProcess = 49,
     ProcessWindowInformation = 50,
     ProcessHandleInformation = 51,
+    ProcessPowerThrottlingState = 77,
+    ProcessLeapSecondInformation = 97,
     MaxProcessInfoClass,
 #ifdef __WINESRC__
     ProcessWineMakeProcessSystem = 1000,
     ProcessWineLdtCopy,
 #endif
-} PROCESSINFOCLASS, PROCESS_INFORMATION_CLASS;
+} PROCESSINFOCLASS;
 
 #define MEM_EXECUTE_OPTION_DISABLE   0x01
 #define MEM_EXECUTE_OPTION_ENABLE    0x02
@@ -4174,7 +4176,7 @@ NTSYSAPI NTSTATUS  WINAPI NtSetInformationFile(HANDLE,PIO_STATUS_BLOCK,PVOID,ULO
 NTSYSAPI NTSTATUS  WINAPI NtSetInformationJobObject(HANDLE,JOBOBJECTINFOCLASS,PVOID,ULONG);
 NTSYSAPI NTSTATUS  WINAPI NtSetInformationKey(HANDLE,const int,PVOID,ULONG);
 NTSYSAPI NTSTATUS  WINAPI NtSetInformationObject(HANDLE, OBJECT_INFORMATION_CLASS, PVOID, ULONG);
-NTSYSAPI NTSTATUS  WINAPI NtSetInformationProcess(HANDLE,PROCESS_INFORMATION_CLASS,PVOID,ULONG);
+NTSYSAPI NTSTATUS  WINAPI NtSetInformationProcess(HANDLE,PROCESSINFOCLASS,PVOID,ULONG);
 NTSYSAPI NTSTATUS  WINAPI NtSetInformationThread(HANDLE,THREADINFOCLASS,LPCVOID,ULONG);
 NTSYSAPI NTSTATUS  WINAPI NtSetInformationToken(HANDLE,TOKEN_INFORMATION_CLASS,PVOID,ULONG);
 NTSYSAPI NTSTATUS  WINAPI NtSetInformationVirtualMemory(HANDLE,VIRTUAL_MEMORY_INFORMATION_CLASS,ULONG_PTR,PMEMORY_RANGE_ENTRY,PVOID,ULONG);