BLKIT: Is BLH_QUERY_PEX still beeing called

Technical Support
, ,
1

Our custom bootloader build using the Bootloader Customizer Kit handles the BLH_QUERY_PEX to control the L2Cache and MPEnable members of PEXCFG.

With BSP 1.5, disabling the MP Support (pPexCfg->MPEnable = 0) is no longer working. It seams as our callback no longer gets called.

Is the BLH_QUERY_PEX message still being sent to the BootloaderKitHookProc ?

2

Message is still called, we changed that structure, so this may impact its memory layout, but the callback should be invoked anyway.
Do you have a way to check if the call is actually performed (like toggling a GPIO or storing a variable and printing its value later on?

3

I am storing the pointer I received in the BLH_QUERY_PEX. The function does get called, but the changes made do not seem to get applied.

The config block has pex.mpenable=1 set.

With the function below, MP support sould get disabled

DWORD HandleQueryPex(PEXCFG *p_pPexCfg)
{
   DWORD dwResult = BLH_NOCHANGES;
   p_pPexCfg->MPEnable = 0;
   p_pPexCfg->CPUs = 1;
   dwResult = BLH_APPLYCHANGES;

   return dwResult;
}

But this is not happening. The OS still boots with SMP support enabled.