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kern: optimize and bring into line with N our pstate.i management

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This commit is contained in:
Michael Scire 2021-10-27 15:00:07 -07:00
parent e81a1ce5a8
commit 4b7b33809f
3 changed files with 42 additions and 23 deletions
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45
libraries/libmesosphere/include/mesosphere/arch/arm64/kern_k_interrupt_manager.hpp
View file

@ -105,35 +105,48 @@ namespace ams::kern::arch::arm64 {
Result UnbindLocal(s32 irq);
Result ClearGlobal(s32 irq);
Result ClearLocal(s32 irq);
public:
static ALWAYS_INLINE u32 DisableInterrupts() {
private:
[[nodiscard]] static ALWAYS_INLINE u32 GetInterruptsEnabledState() {
u64 intr_state;
__asm__ __volatile__("mrs %[intr_state], daif\n"
"msr daifset, #2"
__asm__ __volatile__("mrs %[intr_state], daif\n"
"ubfx %[intr_state], %[intr_state], #7, #1"
: [intr_state]"=r"(intr_state)
:: "memory");
return intr_state;
}
public:
static ALWAYS_INLINE void EnableInterrupts() {
__asm__ __volatile__("msr daifclr, #2" ::: "memory");
}
static ALWAYS_INLINE u32 EnableInterrupts() {
u64 intr_state;
__asm__ __volatile__("mrs %[intr_state], daif\n"
"msr daifclr, #2"
: [intr_state]"=r"(intr_state)
:: "memory");
static ALWAYS_INLINE void DisableInterrupts() {
__asm__ __volatile__("msr daifset, #2" ::: "memory");
}
[[nodiscard]] static ALWAYS_INLINE u32 GetInterruptsEnabledStateAndDisableInterrupts() {
const auto intr_state = GetInterruptsEnabledState();
DisableInterrupts();
return intr_state;
}
[[nodiscard]] static ALWAYS_INLINE u32 GetInterruptsEnabledStateAndEnableInterrupts() {
const auto intr_state = GetInterruptsEnabledState();
EnableInterrupts();
return intr_state;
}
static ALWAYS_INLINE void RestoreInterrupts(u32 intr_state) {
u64 cur_state;
__asm__ __volatile__("mrs %[cur_state], daif" : [cur_state]"=r"(cur_state));
__asm__ __volatile__("msr daif, %[intr_state]" :: [intr_state]"r"((cur_state & ~0x80ul) | (intr_state & 0x80)));
u64 tmp;
__asm__ __volatile__("mrs %[tmp], daif\n"
"bfi %[tmp], %[intr_state], #7, #1\n"
"msr daif, %[tmp]"
: [tmp]"=&r"(tmp)
: [intr_state]"r"(intr_state)
: "memory");
}
static ALWAYS_INLINE bool AreInterruptsEnabled() {
u64 intr_state;
__asm__ __volatile__("mrs %[intr_state], daif" : [intr_state]"=r"(intr_state));
return (intr_state & 0x80) == 0;
return GetInterruptsEnabledState() == 0;
}
};

4
libraries/libmesosphere/include/mesosphere/kern_select_interrupt_manager.hpp
View file

@ -41,7 +41,7 @@ namespace ams::kern {
private:
u32 m_prev_intr_state;
public:
ALWAYS_INLINE KScopedInterruptDisable() : m_prev_intr_state(KInterruptManager::DisableInterrupts()) { /* ... */ }
ALWAYS_INLINE KScopedInterruptDisable() : m_prev_intr_state(KInterruptManager::GetInterruptsEnabledStateAndDisableInterrupts()) { /* ... */ }
ALWAYS_INLINE ~KScopedInterruptDisable() { KInterruptManager::RestoreInterrupts(m_prev_intr_state); }
};
@ -51,7 +51,7 @@ namespace ams::kern {
private:
u32 m_prev_intr_state;
public:
ALWAYS_INLINE KScopedInterruptEnable() : m_prev_intr_state(KInterruptManager::EnableInterrupts()) { /* ... */ }
ALWAYS_INLINE KScopedInterruptEnable() : m_prev_intr_state(KInterruptManager::GetInterruptsEnabledStateAndEnableInterrupts()) { /* ... */ }
ALWAYS_INLINE ~KScopedInterruptEnable() { KInterruptManager::RestoreInterrupts(m_prev_intr_state); }
};