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authorMounir IDRASSI <mounir.idrassi@idrix.fr>2020-02-10 01:20:46 (GMT)
committerMounir IDRASSI <mounir.idrassi@idrix.fr>2020-02-10 01:23:25 (GMT)
commit94d3a1919c8eee4d7bfd7280ee4964477dee02e3 (patch)
tree6b745e402e302dfaa9df976a51f569e0f62619ac /src/Driver
parentc1d670fd752b96abac09b919d7ca1bff4ebafcbc (diff)
downloadVeraCrypt-94d3a1919c8eee4d7bfd7280ee4964477dee02e3.zip
VeraCrypt-94d3a1919c8eee4d7bfd7280ee4964477dee02e3.tar.gz
Windows: Implement support for processor groups in the driver and fix build issues caused by previous implementation
Diffstat (limited to 'src/Driver')
-rw-r--r--src/Driver/Ntdriver.c66
-rw-r--r--src/Driver/Ntdriver.h2
2 files changed, 60 insertions, 8 deletions
diff --git a/src/Driver/Ntdriver.c b/src/Driver/Ntdriver.c
index 8caf7bf..2ae17f5 100644
--- a/src/Driver/Ntdriver.c
+++ b/src/Driver/Ntdriver.c
@@ -143,6 +143,9 @@ static KeSaveExtendedProcessorStateFn KeSaveExtendedProcessorStatePtr = NULL;
static KeRestoreExtendedProcessorStateFn KeRestoreExtendedProcessorStatePtr = NULL;
static ExGetFirmwareEnvironmentVariableFn ExGetFirmwareEnvironmentVariablePtr = NULL;
static KeAreAllApcsDisabledFn KeAreAllApcsDisabledPtr = NULL;
+static KeSetSystemGroupAffinityThreadFn KeSetSystemGroupAffinityThreadPtr = NULL;
+static KeQueryActiveGroupCountFn KeQueryActiveGroupCountPtr = NULL;
+static KeQueryActiveProcessorCountExFn KeQueryActiveProcessorCountExPtr = NULL;
POOL_TYPE ExDefaultNonPagedPoolType = NonPagedPool;
ULONG ExDefaultMdlProtection = 0;
@@ -283,13 +286,20 @@ NTSTATUS DriverEntry (PDRIVER_OBJECT DriverObject, PUNICODE_STRING RegistryPath)
}
// KeSaveExtendedProcessorState/KeRestoreExtendedProcessorState are available starting from Windows 7
+ // KeQueryActiveGroupCount/KeQueryActiveProcessorCountEx/KeSetSystemGroupAffinityThread are available starting from Windows 7
if ((OsMajorVersion > 6) || (OsMajorVersion == 6 && OsMinorVersion >= 1))
{
- UNICODE_STRING saveFuncName, restoreFuncName;
+ UNICODE_STRING saveFuncName, restoreFuncName, groupCountFuncName, procCountFuncName, setAffinityFuncName;
RtlInitUnicodeString(&saveFuncName, L"KeSaveExtendedProcessorState");
RtlInitUnicodeString(&restoreFuncName, L"KeRestoreExtendedProcessorState");
+ RtlInitUnicodeString(&groupCountFuncName, L"KeQueryActiveGroupCount");
+ RtlInitUnicodeString(&procCountFuncName, L"KeQueryActiveProcessorCountEx");
+ RtlInitUnicodeString(&setAffinityFuncName, L"KeSetSystemGroupAffinityThread");
KeSaveExtendedProcessorStatePtr = (KeSaveExtendedProcessorStateFn) MmGetSystemRoutineAddress(&saveFuncName);
KeRestoreExtendedProcessorStatePtr = (KeRestoreExtendedProcessorStateFn) MmGetSystemRoutineAddress(&restoreFuncName);
+ KeSetSystemGroupAffinityThreadPtr = (KeSetSystemGroupAffinityThreadFn) MmGetSystemRoutineAddress(&setAffinityFuncName);
+ KeQueryActiveGroupCountPtr = (KeQueryActiveGroupCountFn) MmGetSystemRoutineAddress(&groupCountFuncName);
+ KeQueryActiveProcessorCountExPtr = (KeQueryActiveProcessorCountExFn) MmGetSystemRoutineAddress(&procCountFuncName);
}
// ExGetFirmwareEnvironmentVariable is available starting from Windows 8
@@ -4488,16 +4498,27 @@ NTSTATUS TCCompleteDiskIrp (PIRP irp, NTSTATUS status, ULONG_PTR information)
size_t GetCpuCount ()
{
- KAFFINITY activeCpuMap = KeQueryActiveProcessors();
- size_t mapSize = sizeof (activeCpuMap) * 8;
size_t cpuCount = 0;
-
- while (mapSize--)
+ if (KeQueryActiveGroupCountPtr && KeQueryActiveProcessorCountExPtr)
+ {
+ USHORT i, groupCount = KeQueryActiveGroupCountPtr ();
+ for (i = 0; i < groupCount; i++)
+ {
+ cpuCount += (size_t) KeQueryActiveProcessorCountExPtr (i);
+ }
+ }
+ else
{
- if (activeCpuMap & 1)
- ++cpuCount;
+ KAFFINITY activeCpuMap = KeQueryActiveProcessors();
+ size_t mapSize = sizeof (activeCpuMap) * 8;
- activeCpuMap >>= 1;
+ while (mapSize--)
+ {
+ if (activeCpuMap & 1)
+ ++cpuCount;
+
+ activeCpuMap >>= 1;
+ }
}
if (cpuCount == 0)
@@ -4506,6 +4527,35 @@ size_t GetCpuCount ()
return cpuCount;
}
+USHORT GetCpuGroup (size_t index)
+{
+ if (KeQueryActiveGroupCountPtr && KeQueryActiveProcessorCountExPtr)
+ {
+ USHORT i, groupCount = KeQueryActiveGroupCountPtr ();
+ size_t cpuCount = 0;
+ for (i = 0; i < groupCount; i++)
+ {
+ cpuCount += (size_t) KeQueryActiveProcessorCountExPtr (i);
+ if (cpuCount >= index)
+ {
+ return i;
+ }
+ }
+ }
+
+ return 0;
+}
+
+void SetThreadCpuGroupAffinity (USHORT index)
+{
+ if (KeSetSystemGroupAffinityThreadPtr)
+ {
+ GROUP_AFFINITY groupAffinity = {0};
+ groupAffinity.Mask = ~0ULL;
+ groupAffinity.Group = index;
+ KeSetSystemGroupAffinityThreadPtr (&groupAffinity, NULL);
+ }
+}
void EnsureNullTerminatedString (wchar_t *str, size_t maxSizeInBytes)
{
diff --git a/src/Driver/Ntdriver.h b/src/Driver/Ntdriver.h
index 2e4d655..25ee64e 100644
--- a/src/Driver/Ntdriver.h
+++ b/src/Driver/Ntdriver.h
@@ -174,6 +174,8 @@ NTSTATUS TCCompleteDiskIrp (PIRP irp, NTSTATUS status, ULONG_PTR information);
NTSTATUS ProbeRealDriveSize (PDEVICE_OBJECT driveDeviceObject, LARGE_INTEGER *driveSize);
BOOL UserCanAccessDriveDevice ();
size_t GetCpuCount ();
+USHORT GetCpuGroup (size_t index);
+void SetThreadCpuGroupAffinity (USHORT index);
void EnsureNullTerminatedString (wchar_t *str, size_t maxSizeInBytes);
void *AllocateMemoryWithTimeout (size_t size, int retryDelay, int timeout);
BOOL IsDriveLetterAvailable (int nDosDriveNo, DeviceNamespaceType namespaceType);