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kern: implement 64-virtual-core interface

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Michael Scire 2020-12-01 15:54:31 -08:00 • committed by SciresM
parent 3fd59b61bc
commit 28f9b534b6
8 changed files with 224 additions and 96 deletions
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26
libraries/libmesosphere/source/svc/kern_svc_processor.cpp
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@ -22,7 +22,31 @@ namespace ams::kern::svc {
namespace {
int32_t GetCurrentProcessorNumber() {
return GetCurrentCoreId();
/* Setup variables to track affinity information. */
s32 current_phys_core;
u64 v_affinity_mask = 0;
/* Forever try to get the affinity. */
while (true) {
/* Update affinity information if we've run out. */
while (v_affinity_mask == 0) {
current_phys_core = GetCurrentCoreId();
v_affinity_mask = GetCurrentThread().GetVirtualAffinityMask();
if ((v_affinity_mask & (1ul << current_phys_core)) != 0) {
return current_phys_core;
}
}
/* Check the next virtual bit. */
do {
const s32 next_virt_core = static_cast<s32>(__builtin_ctzll(v_affinity_mask));
if (current_phys_core == cpu::VirtualToPhysicalCoreMap[next_virt_core]) {
return next_virt_core;
}
v_affinity_mask &= ~(1ul << next_virt_core);
} while (v_affinity_mask != 0);
}
}
}