The code between #if and #endif is only about UMA mode. The CONFIG_GFXUMA should be 1. We have another mode called side port mode. It is When the CONFIG_GFXUMA is 0.
Signed-off-by: Zheng Bao zheng.bao@amd.com
Index: src/cpu/x86/mtrr/mtrr.c =================================================================== --- src/cpu/x86/mtrr/mtrr.c (revision 4505) +++ src/cpu/x86/mtrr/mtrr.c (working copy) @@ -418,7 +418,7 @@ search_global_resources( IORESOURCE_MEM | IORESOURCE_CACHEABLE, IORESOURCE_MEM | IORESOURCE_CACHEABLE, set_var_mtrr_resource, &var_state); -#ifdef CONFIG_GFXUMA +#if (CONFIG_GFXUMA == 1) /* UMA or SP. */ // For now we assume the UMA space is at the end of memory if (var_state.hole_startk || var_state.hole_sizek) { printk_debug("Warning: Can't set up MTRR hole for UMA due to pre-existing MTRR hole.\n");