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exo: use the fancy new optimal atomics

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This commit is contained in:
Michael Scire 2021-10-20 08:52:54 -07:00
parent d74f364107
commit c6d7174dd3
2 changed files with 23 additions and 11 deletions
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4
exosphere/program/source/secmon_exception_handler.cpp
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@ -22,7 +22,7 @@ namespace ams::secmon {
constexpr inline uintptr_t PMC = MemoryRegionVirtualDevicePmc.GetAddress(); constexpr inline uintptr_t PMC = MemoryRegionVirtualDevicePmc.GetAddress();
constinit std::atomic_bool g_is_locked = false; constinit util::Atomic<bool> g_is_locked{false};
} }
@ -72,7 +72,7 @@ namespace ams::secmon {
} }
/* Acquire exclusive access to exception handling logic. */ /* Acquire exclusive access to exception handling logic. */
if (!g_is_locked.exchange(true)) { if (!g_is_locked.Exchange(true)) {
/* Invoke the exception handler impl. */ /* Invoke the exception handler impl. */
ExceptionHandlerImpl(lr, sp); ExceptionHandlerImpl(lr, sp);

30
exosphere/program/source/smc/secmon_smc_se_lock.cpp
View file

@ -21,35 +21,47 @@ namespace ams::secmon::smc {
namespace { namespace {
constinit std::atomic_bool g_is_locked = false; constinit util::Atomic<bool> g_is_locked{false};
ALWAYS_INLINE bool TryLockSecurityEngineImpl() {
bool value = false;
return g_is_locked.CompareExchangeStrong(value, true);
}
ALWAYS_INLINE void UnlockSecurityEngineImpl() {
g_is_locked = false;
}
ALWAYS_INLINE bool IsSecurityEngineLockedImpl() {
return g_is_locked.Load();
}
} }
bool TryLockSecurityEngine() { bool TryLockSecurityEngine() {
bool value = false; return TryLockSecurityEngineImpl();
return g_is_locked.compare_exchange_strong(value, true);
} }
void UnlockSecurityEngine() { void UnlockSecurityEngine() {
g_is_locked = false; return UnlockSecurityEngineImpl();
} }
bool IsSecurityEngineLocked() { bool IsSecurityEngineLocked() {
return g_is_locked; return IsSecurityEngineLockedImpl();
} }
SmcResult LockSecurityEngineAndInvoke(SmcArguments &args, SmcHandler impl) { SmcResult LockSecurityEngineAndInvoke(SmcArguments &args, SmcHandler impl) {
/* Try to lock the security engine. */ /* Try to lock the security engine. */
SMC_R_UNLESS(TryLockSecurityEngine(), Busy); SMC_R_UNLESS(TryLockSecurityEngineImpl(), Busy);
ON_SCOPE_EXIT { UnlockSecurityEngine(); }; ON_SCOPE_EXIT { UnlockSecurityEngineImpl(); };
return impl(args); return impl(args);
} }
SmcResult LockSecurityEngineAndInvokeAsync(SmcArguments &args, SmcHandler impl, GetResultHandler result_handler) { SmcResult LockSecurityEngineAndInvokeAsync(SmcArguments &args, SmcHandler impl, GetResultHandler result_handler) {
/* Try to lock the security engine. */ /* Try to lock the security engine. */
SMC_R_UNLESS(TryLockSecurityEngine(), Busy); SMC_R_UNLESS(TryLockSecurityEngineImpl(), Busy);
auto se_guard = SCOPE_GUARD { UnlockSecurityEngine(); }; auto se_guard = SCOPE_GUARD { UnlockSecurityEngineImpl(); };
/* Try to start an async operation. */ /* Try to start an async operation. */
const u64 async_key = BeginAsyncOperation(result_handler); const u64 async_key = BeginAsyncOperation(result_handler);