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Kernel: Add x2APIC support

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This allows addressing all cores on more modern processors. For now,
we still have a hardcoded limit of 64 due to s_processors being a
static array.
This commit is contained in:
Tom 2021-09-03 21:27:57 -06:00 • committed by Andreas Kling
parent 123087e235
commit 8a258edfd6
5 changed files with 108 additions and 48 deletions
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8
Kernel/Arch/x86/Processor.h
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@ -102,9 +102,9 @@ struct DeferredCallEntry {
};
class Processor;
// Note: We only support 8 processors at most at the moment,
// so allocate 8 slots of inline capacity in the container.
using ProcessorContainer = Array<Processor*, 8>;
// Note: We only support 64 processors at most at the moment,
// so allocate 64 slots of inline capacity in the container.
using ProcessorContainer = Array<Processor*, 64>;
class Processor {
friend class ProcessorInfo;
@ -190,6 +190,8 @@ public:
s_idle_cpu_mask.fetch_and(~(1u << m_cpu), AK::MemoryOrder::memory_order_relaxed);
}
static Processor& by_id(u32);
static u32 count()
{
// NOTE: because this value never changes once all APs are booted,