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[HAL] Refactor PCI blacklisting for Xbox

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- Use a separate function for detecting blacklisted PCI slots
- Blacklist PCI-to-PCI bridge to avoid stack overflow on real hardware Microsoft Xbox 1.3

CORE-16319 CORE-16216
This commit is contained in:
Stanislav Motylkov 2019-08-20 00:48:49 +03:00 committed by Mark Jansen
parent cda2bc50eb
commit b99272702c
1 changed files with 33 additions and 33 deletions
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66
hal/halx86/legacy/bus/pcibus.c
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@ -311,6 +311,36 @@ HalpWritePCIConfig(IN PBUS_HANDLER BusHandler,
}
}
#ifdef SARCH_XBOX
BOOLEAN
NTAPI
HalpXboxBlacklistedPCISlot(IN PBUS_HANDLER BusHandler,
IN PCI_SLOT_NUMBER Slot)
{
/* Trying to get PCI config data from devices 0:0:1 and 0:0:2 will completely
* hang the Xbox. Also, the device number doesn't seem to be decoded for the
* video card, so it appears to be present on 1:0:0 - 1:31:0.
* We hack around these problems by indicating "device not present" for devices
* 0:0:1, 0:0:2, 1:1:0, 1:2:0, 1:3:0, ...., 1:31:0 */
if ((BusHandler->BusNumber == 0 && Slot.u.bits.DeviceNumber == 0 &&
(Slot.u.bits.FunctionNumber == 1 || Slot.u.bits.FunctionNumber == 2)) ||
(BusHandler->BusNumber == 1 && Slot.u.bits.DeviceNumber != 0))
{
DPRINT("Blacklisted PCI slot (%d:%d:%d)\n", BusHandler->BusNumber, Slot.u.bits.DeviceNumber, Slot.u.bits.FunctionNumber);
return TRUE;
}
/* Temporary hack to avoid stack overflow in kernel, see CORE-16319 */
if (BusHandler->BusNumber == 0 && Slot.u.bits.DeviceNumber == 8 && Slot.u.bits.FunctionNumber == 0)
{
DPRINT("Blacklisted PCI-to-PCI bridge (00:08.0 - PCI\\VEN_10DE&DEV_01B8, see CORE-16319)\n");
return TRUE;
}
return FALSE;
}
#endif
BOOLEAN
NTAPI
HalpValidPCISlot(IN PBUS_HANDLER BusHandler,
@ -326,18 +356,7 @@ HalpValidPCISlot(IN PBUS_HANDLER BusHandler,
if (Slot.u.bits.DeviceNumber >= BusData->MaxDevice) return FALSE;
#ifdef SARCH_XBOX
/* Trying to get PCI config data from devices 0:0:1 and 0:0:2 will completely
* hang the Xbox. Also, the device number doesn't seem to be decoded for the
* video card, so it appears to be present on 1:0:0 - 1:31:0.
* We hack around these problems by indicating "device not present" for devices
* 0:0:1, 0:0:2, 1:1:0, 1:2:0, 1:3:0, ...., 1:31:0 */
if ((BusHandler->BusNumber == 0 && Slot.u.bits.DeviceNumber == 0 &&
(Slot.u.bits.FunctionNumber == 1 || Slot.u.bits.FunctionNumber == 2)) ||
(BusHandler->BusNumber == 1 && Slot.u.bits.DeviceNumber != 0))
{
DPRINT("HalpValidPCISlot(): Blacklisted PCI slot (%d:%d:%d)\n", BusHandler->BusNumber, Slot.u.bits.DeviceNumber, Slot.u.bits.FunctionNumber);
return FALSE;
}
if (HalpXboxBlacklistedPCISlot(BusHandler, Slot)) return FALSE;
#endif
/* Function 0 doesn't need checking */
@ -378,16 +397,8 @@ HalpGetPCIData(IN PBUS_HANDLER BusHandler,
Slot.u.AsULONG = SlotNumber;
#ifdef SARCH_XBOX
/* Trying to get PCI config data from devices 0:0:1 and 0:0:2 will completely
* hang the Xbox. Also, the device number doesn't seem to be decoded for the
* video card, so it appears to be present on 1:0:0 - 1:31:0.
* We hack around these problems by indicating "device not present" for devices
* 0:0:1, 0:0:2, 1:1:0, 1:2:0, 1:3:0, ...., 1:31:0 */
if ((BusHandler->BusNumber == 0 && Slot.u.bits.DeviceNumber == 0 &&
(Slot.u.bits.FunctionNumber == 1 || Slot.u.bits.FunctionNumber == 2)) ||
(BusHandler->BusNumber == 1 && Slot.u.bits.DeviceNumber != 0))
if (HalpXboxBlacklistedPCISlot(BusHandler, Slot))
{
DPRINT("Blacklisted PCI slot (%d:%d:%d)\n", BusHandler->BusNumber, Slot.u.bits.DeviceNumber, Slot.u.bits.FunctionNumber);
if (Offset == 0 && Length >= sizeof(USHORT))
{
*(PUSHORT)Buffer = PCI_INVALID_VENDORID;
@ -470,18 +481,7 @@ HalpSetPCIData(IN PBUS_HANDLER BusHandler,
Slot.u.AsULONG = SlotNumber;
#ifdef SARCH_XBOX
/* Trying to get PCI config data from devices 0:0:1 and 0:0:2 will completely
* hang the Xbox. Also, the device number doesn't seem to be decoded for the
* video card, so it appears to be present on 1:0:0 - 1:31:0.
* We hack around these problems by indicating "device not present" for devices
* 0:0:1, 0:0:2, 1:1:0, 1:2:0, 1:3:0, ...., 1:31:0 */
if ((BusHandler->BusNumber == 0 && Slot.u.bits.DeviceNumber == 0 &&
(Slot.u.bits.FunctionNumber == 1 || Slot.u.bits.FunctionNumber == 2)) ||
(BusHandler->BusNumber == 1 && Slot.u.bits.DeviceNumber != 0))
{
DPRINT1("Trying to set data on blacklisted PCI slot (%d:%d:%d)\n", BusHandler->BusNumber, Slot.u.bits.DeviceNumber, Slot.u.bits.FunctionNumber);
return 0;
}
if (HalpXboxBlacklistedPCISlot(BusHandler, Slot)) return 0;
#endif
/* Normalize the length */