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kern: fix multicore instruction cache invalidation

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This commit is contained in:
Michael Scire 2020-08-03 18:39:32 -07:00 committed by SciresM
parent f058536b59
commit b5f2698bf0
3 changed files with 72 additions and 35 deletions
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8
libraries/libmesosphere/include/mesosphere/arch/arm64/kern_cpu.hpp
View file

@ -59,11 +59,6 @@ namespace ams::kern::arch::arm64::cpu {
InstructionMemoryBarrier();
}
ALWAYS_INLINE void InvalidateEntireInstructionCache() {
__asm__ __volatile__("ic iallu" ::: "memory");
EnsureInstructionConsistency();
}
ALWAYS_INLINE void Yield() {
__asm__ __volatile__("yield" ::: "memory");
}
@ -179,6 +174,7 @@ namespace ams::kern::arch::arm64::cpu {
void ClearPageToZeroImpl(void *);
void FlushEntireDataCacheSharedForInit();
void FlushEntireDataCacheLocalForInit();
void InvalidateEntireInstructionCacheForInit();
void StoreEntireCacheForInit();
void FlushEntireDataCache();
@ -188,6 +184,8 @@ namespace ams::kern::arch::arm64::cpu {
Result FlushDataCache(const void *addr, size_t size);
Result InvalidateInstructionCache(void *addr, size_t size);
void InvalidateEntireInstructionCache();
ALWAYS_INLINE void ClearPageToZero(void *page) {
MESOSPHERE_ASSERT(util::IsAligned(reinterpret_cast<uintptr_t>(page), PageSize));
MESOSPHERE_ASSERT(page != nullptr);

97
libraries/libmesosphere/source/arch/arm64/kern_cpu.cpp
View file

@ -155,43 +155,56 @@ namespace ams::kern::arch::arm64::cpu {
void RequestOperation(Operation op) {
KScopedLightLock lk(this->lock);
MESOSPHERE_ABORT_UNLESS(this->operation == Operation::Idle);
/* Send and wait for acknowledgement of request. */
{
KScopedLightLock cv_lk(this->cv_lock);
/* Create core masks for us to use. */
constexpr u64 AllCoresMask = (1ul << cpu::NumCores) - 1ul;
const u64 other_cores_mask = AllCoresMask & ~(1ul << GetCurrentCoreId());
if ((op == Operation::InvalidateInstructionCache) || (Kernel::GetState() == Kernel::State::Initializing)) {
/* Check that there's no on-going operation. */
MESOSPHERE_ABORT_UNLESS(this->operation == Operation::Idle);
MESOSPHERE_ABORT_UNLESS(this->target_cores == 0);
/* Set operation. */
this->operation = op;
/* Create core masks for us to use. */
constexpr u64 AllCoresMask = (1ul << cpu::NumCores) - 1ul;
const u64 other_cores_mask = AllCoresMask & ~(1ul << GetCurrentCoreId());
/* For certain operations, we want to send an interrupt. */
this->target_cores = other_cores_mask;
if ((op == Operation::InvalidateInstructionCache) || (Kernel::GetState() == Kernel::State::Initializing)) {
/* For certain operations, we want to send an interrupt. */
this->target_cores = other_cores_mask;
DataSynchronizationBarrier();
const u64 target_mask = this->target_cores;
DataSynchronizationBarrier();
Kernel::GetInterruptManager().SendInterProcessorInterrupt(KInterruptName_CacheOperation, target_mask);
this->ProcessOperation();
while (this->target_cores != 0) {
cpu::Yield();
}
} else {
/* Request all cores. */
this->target_cores = AllCoresMask;
const u64 target_mask = this->target_cores;
DataSynchronizationBarrier();
Kernel::GetInterruptManager().SendInterProcessorInterrupt(KInterruptName_CacheOperation, target_mask);
/* Use the condvar. */
this->cv.Broadcast();
while (this->target_cores != 0) {
this->cv.Wait(std::addressof(this->cv_lock));
}
this->ProcessOperation();
while (this->target_cores != 0) {
cpu::Yield();
}
/* Go idle again. */
this->operation = Operation::Idle;
} else {
/* Lock condvar so that we can send and wait for acknowledgement of request. */
KScopedLightLock cv_lk(this->cv_lock);
/* Check that there's no on-going operation. */
MESOSPHERE_ABORT_UNLESS(this->operation == Operation::Idle);
MESOSPHERE_ABORT_UNLESS(this->target_cores == 0);
/* Set operation. */
this->operation = op;
/* Request all cores. */
this->target_cores = AllCoresMask;
/* Use the condvar. */
this->cv.Broadcast();
while (this->target_cores != 0) {
this->cv.Wait(std::addressof(this->cv_lock));
}
/* Go idle again. */
this->operation = Operation::Idle;
}
/* Go idle again. */
this->operation = Operation::Idle;
}
};
@ -285,6 +298,8 @@ namespace ams::kern::arch::arm64::cpu {
DataSynchronizationBarrier();
break;
}
this->target_cores &= ~(1ul << GetCurrentCoreId());
}
ALWAYS_INLINE void SetEventLocally() {
@ -327,6 +342,14 @@ namespace ams::kern::arch::arm64::cpu {
return ResultSuccess();
}
ALWAYS_INLINE void InvalidateEntireInstructionCacheLocalImpl() {
__asm__ __volatile__("ic iallu" ::: "memory");
}
ALWAYS_INLINE void InvalidateEntireInstructionCacheGlobalImpl() {
__asm__ __volatile__("ic ialluis" ::: "memory");
}
}
void FlushEntireDataCacheSharedForInit() {
@ -337,11 +360,16 @@ namespace ams::kern::arch::arm64::cpu {
return PerformCacheOperationBySetWayLocal<true>(FlushDataCacheLineBySetWayImpl);
}
void InvalidateEntireInstructionCacheForInit() {
InvalidateEntireInstructionCacheLocalImpl();
EnsureInstructionConsistency();
}
void StoreEntireCacheForInit() {
PerformCacheOperationBySetWayLocal<true>(StoreDataCacheLineBySetWayImpl);
PerformCacheOperationBySetWayShared<true>(StoreDataCacheLineBySetWayImpl);
DataSynchronizationBarrierInnerShareable();
InvalidateEntireInstructionCache();
InvalidateEntireInstructionCacheForInit();
}
void FlushEntireDataCache() {
@ -401,6 +429,17 @@ namespace ams::kern::arch::arm64::cpu {
return ResultSuccess();
}
void InvalidateEntireInstructionCache() {
KScopedCoreMigrationDisable dm;
/* Invalidate the instruction cache on all cores. */
InvalidateEntireInstructionCacheGlobalImpl();
EnsureInstructionConsistency();
/* Request the interrupt helper to invalidate, too. */
g_cache_operation_handler.RequestOperation(KCacheHelperInterruptHandler::Operation::InvalidateInstructionCache);
}
void InitializeInterruptThreads(s32 core_id) {
/* Initialize the cache operation handler. */
g_cache_operation_handler.Initialize(core_id);

2
mesosphere/kernel_ldr/source/kern_init_loader.cpp
View file

@ -81,7 +81,7 @@ namespace ams::kern::init::loader {
cpu::DataSynchronizationBarrier();
/* Invalidate entire instruction cache. */
cpu::InvalidateEntireInstructionCache();
cpu::InvalidateEntireInstructionCacheForInit();
/* Invalidate entire TLB. */
cpu::InvalidateEntireTlb();