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kern: use slab allocated KSessionRequest dynamic mappings

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Michael Scire 2022-10-12 00:36:32 -07:00 • committed by SciresM
parent e7a1e0fee2
commit 13238fc4fd
4 changed files with 91 additions and 72 deletions
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28
libraries/libmesosphere/include/mesosphere/kern_k_session_request.hpp
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@ -29,7 +29,10 @@ namespace ams::kern {
public:
class SessionMappings {
private:
static constexpr size_t NumStaticMappings = 8;
/* At most 15 buffers of each type (4-bit descriptor counts), for 45 total. */
static constexpr size_t NumMappings = ((1ul << 4) - 1) * 3;
static constexpr size_t NumStaticMappings = 8;
static constexpr size_t NumDynamicMappings = NumMappings - NumStaticMappings;
class Mapping {
private:
@ -50,16 +53,27 @@ namespace ams::kern {
constexpr ALWAYS_INLINE size_t GetSize() const { return m_size; }
constexpr ALWAYS_INLINE KMemoryState GetMemoryState() const { return m_state; }
};
public:
class DynamicMappings : public KSlabAllocated<DynamicMappings, true> {
private:
Mapping m_mappings[NumDynamicMappings];
public:
constexpr explicit DynamicMappings() : m_mappings() { /* ... */ }
constexpr ALWAYS_INLINE Mapping &Get(size_t idx) { return m_mappings[idx]; }
constexpr ALWAYS_INLINE const Mapping &Get(size_t idx) const { return m_mappings[idx]; }
};
static_assert(sizeof(DynamicMappings) == sizeof(Mapping) * NumDynamicMappings);
private:
Mapping m_static_mappings[NumStaticMappings];
Mapping *m_mappings;
DynamicMappings *m_dynamic_mappings;
u8 m_num_send;
u8 m_num_recv;
u8 m_num_exch;
public:
constexpr explicit SessionMappings(util::ConstantInitializeTag) : m_static_mappings(), m_mappings(), m_num_send(), m_num_recv(), m_num_exch() { /* ... */ }
constexpr explicit SessionMappings(util::ConstantInitializeTag) : m_static_mappings(), m_dynamic_mappings(), m_num_send(), m_num_recv(), m_num_exch() { /* ... */ }
explicit SessionMappings() : m_mappings(nullptr), m_num_send(), m_num_recv(), m_num_exch() { /* ... */ }
explicit SessionMappings() : m_dynamic_mappings(nullptr), m_num_send(), m_num_recv(), m_num_exch() { /* ... */ }
void Initialize() { /* ... */ }
void Finalize();
@ -96,7 +110,7 @@ namespace ams::kern {
if (index < NumStaticMappings) {
return m_static_mappings[index];
} else {
return m_mappings[index - NumStaticMappings];
return m_dynamic_mappings->Get(index - NumStaticMappings);
}
}
@ -107,7 +121,7 @@ namespace ams::kern {
if (index < NumStaticMappings) {
return m_static_mappings[index];
} else {
return m_mappings[index - NumStaticMappings];
return m_dynamic_mappings->Get(index - NumStaticMappings);
}
}
@ -118,7 +132,7 @@ namespace ams::kern {
if (index < NumStaticMappings) {
return m_static_mappings[index];
} else {
return m_mappings[index - NumStaticMappings];
return m_dynamic_mappings->Get(index - NumStaticMappings);
}
}
};