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kern: support dynamic resource expansion for system heaps/events/sessions.

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This commit is contained in:
Michael Scire
2021-09-17 22:01:58 -07:00
committed by SciresM
parent 2b91956051
commit 2c4bd44d7e
37 changed files with 856 additions and 328 deletions
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31
libraries/libmesosphere/source/init/kern_init_slab_setup.cpp
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@@ -173,8 +173,9 @@ namespace ams::kern::init {
}
void InitializeSlabHeaps() {
/* Get the start of the slab region, since that's where we'll be working. */
KVirtualAddress address = KMemoryLayout::GetSlabRegionAddress();
/* Get the slab region, since that's where we'll be working. */
const KMemoryRegion &slab_region = KMemoryLayout::GetSlabRegion();
KVirtualAddress address = slab_region.GetAddress();
/* Initialize slab type array to be in sorted order. */
KSlabType slab_types[KSlabType_Count];
@@ -202,13 +203,21 @@ namespace ams::kern::init {
}
}
/* Track the gaps, so that we can free them to the unused slab tree. */
KVirtualAddress gap_start = address;
size_t gap_size = 0;
for (size_t i = 0; i < util::size(slab_types); i++) {
/* Add the random gap to the address. */
address += (i == 0) ? slab_gaps[0] : slab_gaps[i] - slab_gaps[i - 1];
const auto cur_gap = (i == 0) ? slab_gaps[0] : slab_gaps[i] - slab_gaps[i - 1];
address += cur_gap;
gap_size += cur_gap;
#define INITIALIZE_SLAB_HEAP(NAME, COUNT, ...) \
case KSlabType_##NAME: \
address = InitializeSlabHeap<NAME>(address, COUNT); \
#define INITIALIZE_SLAB_HEAP(NAME, COUNT, ...) \
case KSlabType_##NAME: \
if (COUNT > 0) { \
address = InitializeSlabHeap<NAME>(address, COUNT); \
} \
break;
/* Initialize the slabheap. */
@@ -218,7 +227,17 @@ namespace ams::kern::init {
/* If we somehow get an invalid type, abort. */
MESOSPHERE_UNREACHABLE_DEFAULT_CASE();
}
/* If we've hit the end of a gap, free it. */
if (gap_start + gap_size != address) {
FreeUnusedSlabMemory(gap_start, gap_size);
gap_start = address;
gap_size = 0;
}
}
/* Free the end of the slab region. */
FreeUnusedSlabMemory(gap_start, gap_size + (slab_region.GetEndAddress() - GetInteger(address)));
}
}