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Savestates/PPU: Ensure correct PPU state on MMIO

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This commit is contained in:
Elad Ashkenazi 2024-07-15 14:02:40 +03:00
parent 77e8f9a8ab
commit a2534263fe
2 changed files with 37 additions and 1 deletions
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35
rpcs3/Emu/Cell/PPUTranslator.cpp
View file

@ -765,6 +765,25 @@ llvm::Value* PPUTranslator::GetMemory(llvm::Value* addr)
return m_ir->CreateGEP(get_type<u8>(), m_base, addr);
}
void PPUTranslator::TestAborted()
{
const auto body = BasicBlock::Create(m_context, fmt::format("__body_0x%x_%s", m_cia, m_ir->GetInsertBlock()->getName().str()), m_function);
// Check status register in the entry block
auto ptr = llvm::dyn_cast<GetElementPtrInst>(m_ir->CreateStructGEP(m_thread_type, m_thread, 1));
assert(ptr->getResultElementType() == GetType<u32>());
const auto vstate = m_ir->CreateLoad(ptr->getResultElementType(), ptr, true);
const auto vcheck = BasicBlock::Create(m_context, fmt::format("__test_0x%x_%s", m_cia, m_ir->GetInsertBlock()->getName().str()), m_function);
m_ir->CreateCondBr(m_ir->CreateIsNull(m_ir->CreateAnd(vstate, static_cast<u32>(cpu_flag::again + cpu_flag::exit))), body, vcheck, m_md_likely);
m_ir->SetInsertPoint(vcheck);
// Create tail call to the check function
Call(GetType<void>(), "__check", m_thread, GetAddr())->setTailCall();
m_ir->CreateRetVoid();
m_ir->SetInsertPoint(body);
}
Value* PPUTranslator::ReadMemory(Value* addr, Type* type, bool is_be, u32 align)
{
const u32 size = ::narrow<u32>(+type->getPrimitiveSizeInBits());
@ -797,8 +816,13 @@ Value* PPUTranslator::ReadMemory(Value* addr, Type* type, bool is_be, u32 align)
if (m_may_be_mmio && size == 32)
{
FlushRegisters();
RegStore(Trunc(GetAddr()), m_cia);
ppu_log.notice("LLVM: Detected potential MMIO32 read at [0x%08x]", m_addr + (m_reloc ? m_reloc->addr : 0));
value = Call(GetType<u32>(), "__read_maybe_mmio32", m_base, addr);
TestAborted();
}
else
{
@ -812,8 +836,13 @@ Value* PPUTranslator::ReadMemory(Value* addr, Type* type, bool is_be, u32 align)
if (m_may_be_mmio && size == 32)
{
FlushRegisters();
RegStore(Trunc(GetAddr()), m_cia);
ppu_log.notice("LLVM: Detected potential MMIO32 read at [0x%08x]", m_addr + (m_reloc ? m_reloc->addr : 0));
return Call(GetType<u32>(), "__read_maybe_mmio32", m_base, addr);
Value* r = Call(GetType<u32>(), "__read_maybe_mmio32", m_base, addr);
TestAborted();
return r;
}
// Read normally
@ -846,8 +875,12 @@ void PPUTranslator::WriteMemory(Value* addr, Value* value, bool is_be, u32 align
{
if (ppu_test_address_may_be_mmio(std::span(ptr->insts)))
{
FlushRegisters();
RegStore(Trunc(GetAddr()), m_cia);
ppu_log.notice("LLVM: Detected potential MMIO32 write at [0x%08x]", m_addr + (m_reloc ? m_reloc->addr : 0));
Call(GetType<void>(), "__write_maybe_mmio32", m_base, addr, value);
TestAborted();
return;
}
}

3
rpcs3/Emu/Cell/PPUTranslator.h
View file

@ -150,6 +150,9 @@ public:
// Emit function call
void CallFunction(u64 target, llvm::Value* indirect = nullptr);
// Emit state check mid-block
void TestAborted();
// Initialize global for writing
llvm::Value* RegInit(llvm::Value*& local);