[ofw] [PATCH] affinity options

[Slava Strebkov]

Hi,

The following patch provides a way to user to specify the cpu affinity
mask.

Setting the value of ProcessorAffinity to FFFFFFFF binds interrupt to
last cpu on machine.

 

Index: hw/mthca/kernel/hca_pnp.c

===================================================================

--- hw/mthca/kernel/hca_pnp.c   (revision 1031)

+++ hw/mthca/kernel/hca_pnp.c (working copy)

@@ -678,6 +678,29 @@

                        if( pHcaRes->Type == CmResourceTypeInterrupt )

                        {

                                    p_ext->interruptInfo = *pHostRes;

+            if ( g_processor_affinity == 0xFFFFFFFF ) 

+                                  {

+                                              /* 

+                                              * Calculate the mask of
the last processor

+                                              */

+                                              KAFFINITY
n_active_processors_bitmask;

+                                              uint32_t
last_processor_mask = 0 , tmp_processor_mask = 1;

+                                              

+
n_active_processors_bitmask = KeQueryActiveProcessors();

+                while ( tmp_processor_mask &
n_active_processors_bitmask )

+                                              {

+
last_processor_mask = tmp_processor_mask;

+
tmp_processor_mask = tmp_processor_mask << 1;

+                                              }

+
p_ext->interruptInfo.u.Interrupt.Affinity = last_processor_mask; 

+                                  }

+                                  else if (g_processor_affinity != 0) 

+                                  {

+
p_ext->interruptInfo.u.Interrupt.Affinity = g_processor_affinity;


+                                  }

+                                  HCA_PRINT( TRACE_LEVEL_INFORMATION,
HCA_DBG_PNP,("Set Interrupt affinity to : 0x%08X\n",

+
(int)p_ext->interruptInfo.u.Interrupt.Affinity ));

+

                                    continue;

                        }

                        

Index: hw/mthca/kernel/mt_l2w.c

===================================================================

--- hw/mthca/kernel/mt_l2w.c      (revision 1031)

+++ hw/mthca/kernel/mt_l2w.c    (working copy)

@@ -118,7 +118,7 @@

                        (BOOLEAN)((int_info->Flags ==
CM_RESOURCE_INTERRUPT_LATCHED) ? 

                        Latched : LevelSensitive),
/* interrupt type: LATCHED or LEVEL */

                        (BOOLEAN)(int_info->ShareDisposition ==
CmResourceShareShared),    /* vector shared or not */

-                       g_processor_affinity ? g_processor_affinity :
(KAFFINITY)int_info->u.Interrupt.Affinity,       /* interrupt affinity
*/

+                      (KAFFINITY)int_info->u.Interrupt.Affinity,
/* interrupt affinity */

                        FALSE
/* whether to save Float registers */

                        );

 

 

Slava Strebkov

SW Engineer

Voltaire

099718750

 

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