xnu-4570.31.3.tar.gz

[apple/xnu.git] / san / kasan-x86_64.c

diff --git a/san/kasan-x86_64.c b/san/kasan-x86_64.c
index 72339d8cdc2218ad3bad20869404d17d8325dafd..93e8e416e6aadef7698e86096bae899199adbe0a 100644 (file)
--- a/san/kasan-x86_64.c
+++ b/san/kasan-x86_64.c
@@ -274,11 +274,6 @@ kasan_arch_init(void)
 
        /* Map the physical aperture */
        kasan_map_shadow_superpage_zero(physmap_base, physmap_max - physmap_base);
-       /* Establish shadow mappings for the x86 descriptor tables and
-        * "low global" page; these are specially alias-mapped at fixed VAs
-        * early in boot
-        */
-       kasan_map_low_fixed_regions();
 }
 
 /*
@@ -311,8 +306,7 @@ kasan_reserve_memory(void *_args)
                total_pages += mptr_tmp->NumberOfPages;
        }
 
-       /* steal 25% of physical memory */
-       to_steal = total_pages / 4;
+       to_steal = (total_pages * STOLEN_MEM_PERCENT) / 100 + (STOLEN_MEM_BYTES / I386_PGBYTES);
 
        /* Search for a range large enough to steal from */
        for (i = 0, mptr_tmp = mptr; i < mcount; i++, mptr_tmp = (EfiMemoryRange *)(((vm_offset_t)mptr_tmp) + msize)) {