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Merge pull request #9234 from liamwhite/data-cash-money 

kernel: implement data cache management operations
This commit is contained in:
bunnei 2022-11-18 13:18:36 -08:00 committed by GitHub
parent 405d685101 651f6598ac
commit 1fb33bd1e1
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7 changed files with 214 additions and 8 deletions
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2
src/common/CMakeLists.txt
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@ -34,6 +34,8 @@ add_library(common STATIC
bit_util.h
cityhash.cpp
cityhash.h
cache_management.cpp
cache_management.h
common_funcs.h
common_types.h
concepts.h

60
src/common/cache_management.cpp Normal file
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@ -0,0 +1,60 @@
// SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#include <cstring>
#include "alignment.h"
#include "cache_management.h"
#include "common_types.h"
namespace Common {
#if defined(ARCHITECTURE_x86_64)
// Most cache operations are no-ops on x86
void DataCacheLineCleanByVAToPoU(void* start, size_t size) {}
void DataCacheLineCleanAndInvalidateByVAToPoC(void* start, size_t size) {}
void DataCacheLineCleanByVAToPoC(void* start, size_t size) {}
void DataCacheZeroByVA(void* start, size_t size) {
std::memset(start, 0, size);
}
#elif defined(ARCHITECTURE_arm64)
// BS/DminLine is log2(cache size in words), we want size in bytes
#define EXTRACT_DMINLINE(ctr_el0) (1 << ((((ctr_el0) >> 16) & 0xf) + 2))
#define EXTRACT_BS(dczid_el0) (1 << (((dczid_el0)&0xf) + 2))
#define DEFINE_DC_OP(op_name, function_name) \
void function_name(void* start, size_t size) { \
size_t ctr_el0; \
asm volatile("mrs %[ctr_el0], ctr_el0\n\t" : [ctr_el0] "=r"(ctr_el0)); \
size_t cacheline_size = EXTRACT_DMINLINE(ctr_el0); \
uintptr_t va_start = reinterpret_cast<uintptr_t>(start); \
uintptr_t va_end = va_start + size; \
for (uintptr_t va = va_start; va < va_end; va += cacheline_size) { \
asm volatile("dc " #op_name ", %[va]\n\t" : : [va] "r"(va) : "memory"); \
} \
}
#define DEFINE_DC_OP_DCZID(op_name, function_name) \
void function_name(void* start, size_t size) { \
size_t dczid_el0; \
asm volatile("mrs %[dczid_el0], dczid_el0\n\t" : [dczid_el0] "=r"(dczid_el0)); \
size_t cacheline_size = EXTRACT_BS(dczid_el0); \
uintptr_t va_start = reinterpret_cast<uintptr_t>(start); \
uintptr_t va_end = va_start + size; \
for (uintptr_t va = va_start; va < va_end; va += cacheline_size) { \
asm volatile("dc " #op_name ", %[va]\n\t" : : [va] "r"(va) : "memory"); \
} \
}
DEFINE_DC_OP(cvau, DataCacheLineCleanByVAToPoU);
DEFINE_DC_OP(civac, DataCacheLineCleanAndInvalidateByVAToPoC);
DEFINE_DC_OP(cvac, DataCacheLineCleanByVAToPoC);
DEFINE_DC_OP_DCZID(zva, DataCacheZeroByVA);
#endif
} // namespace Common

27
src/common/cache_management.h Normal file
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@ -0,0 +1,27 @@
// SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#pragma once
#include "stdlib.h"
namespace Common {
// Data cache instructions enabled at EL0 by SCTLR_EL1.UCI.
// VA = virtual address
// PoC = point of coherency
// PoU = point of unification
// dc cvau
void DataCacheLineCleanByVAToPoU(void* start, size_t size);
// dc civac
void DataCacheLineCleanAndInvalidateByVAToPoC(void* start, size_t size);
// dc cvac
void DataCacheLineCleanByVAToPoC(void* start, size_t size);
// dc zva
void DataCacheZeroByVA(void* start, size_t size);
} // namespace Common

26
src/core/hle/kernel/svc.cpp
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@ -2701,14 +2701,24 @@ static Result GetThreadList(Core::System& system, u32* out_num_threads, VAddr ou
return ResultSuccess;
}
static Result FlushProcessDataCache32([[maybe_unused]] Core::System& system,
[[maybe_unused]] Handle handle, [[maybe_unused]] u32 address,
[[maybe_unused]] u32 size) {
// Note(Blinkhawk): For emulation purposes of the data cache this is mostly a no-op,
// as all emulation is done in the same cache level in host architecture, thus data cache
// does not need flushing.
LOG_DEBUG(Kernel_SVC, "called");
return ResultSuccess;
static Result FlushProcessDataCache32(Core::System& system, Handle process_handle, u64 address,
u64 size) {
// Validate address/size.
R_UNLESS(size > 0, ResultInvalidSize);
R_UNLESS(address == static_cast<uintptr_t>(address), ResultInvalidCurrentMemory);
R_UNLESS(size == static_cast<size_t>(size), ResultInvalidCurrentMemory);
// Get the process from its handle.
KScopedAutoObject process =
system.Kernel().CurrentProcess()->GetHandleTable().GetObject<KProcess>(process_handle);
R_UNLESS(process.IsNotNull(), ResultInvalidHandle);
// Verify the region is within range.
auto& page_table = process->PageTable();
R_UNLESS(page_table.Contains(address, size), ResultInvalidCurrentMemory);
// Perform the operation.
R_RETURN(system.Memory().FlushDataCache(*process, address, size));
}
namespace {

8
src/core/hle/kernel/svc_wrap.h
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@ -722,4 +722,12 @@ void SvcWrap32(Core::System& system) {
FuncReturn(system, retval);
}
// Used by Invalidate/Store/FlushProcessDataCache32
template <Result func(Core::System&, Handle, u64, u64)>
void SvcWrap32(Core::System& system) {
const u64 address = (Param(system, 3) << 32) | Param(system, 2);
const u64 size = (Param(system, 4) << 32) | Param(system, 1);
FuncReturn32(system, func(system, Param32(system, 0), address, size).raw);
}
} // namespace Kernel

65
src/core/memory.cpp
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@ -6,6 +6,7 @@
#include "common/assert.h"
#include "common/atomic_ops.h"
#include "common/cache_management.h"
#include "common/common_types.h"
#include "common/logging/log.h"
#include "common/page_table.h"
@ -329,6 +330,55 @@ struct Memory::Impl {
});
}
template <typename Callback>
Result PerformCacheOperation(const Kernel::KProcess& process, VAddr dest_addr, std::size_t size,
Callback&& cb) {
class InvalidMemoryException : public std::exception {};
try {
WalkBlock(
process, dest_addr, size,
[&](const std::size_t block_size, const VAddr current_vaddr) {
LOG_ERROR(HW_Memory, "Unmapped cache maintenance @ {:#018X}", current_vaddr);
throw InvalidMemoryException();
},
[&](const std::size_t block_size, u8* const host_ptr) { cb(block_size, host_ptr); },
[&](const VAddr current_vaddr, const std::size_t block_size, u8* const host_ptr) {
system.GPU().FlushRegion(current_vaddr, block_size);
cb(block_size, host_ptr);
},
[](const std::size_t block_size) {});
} catch (InvalidMemoryException&) {
return Kernel::ResultInvalidCurrentMemory;
}
return ResultSuccess;
}
Result InvalidateDataCache(const Kernel::KProcess& process, VAddr dest_addr, std::size_t size) {
auto perform = [&](const std::size_t block_size, u8* const host_ptr) {
// Do nothing; this operation (dc ivac) cannot be supported
// from EL0
};
return PerformCacheOperation(process, dest_addr, size, perform);
}
Result StoreDataCache(const Kernel::KProcess& process, VAddr dest_addr, std::size_t size) {
auto perform = [&](const std::size_t block_size, u8* const host_ptr) {
// dc cvac: Store to point of coherency
Common::DataCacheLineCleanByVAToPoC(host_ptr, block_size);
};
return PerformCacheOperation(process, dest_addr, size, perform);
}
Result FlushDataCache(const Kernel::KProcess& process, VAddr dest_addr, std::size_t size) {
auto perform = [&](const std::size_t block_size, u8* const host_ptr) {
// dc civac: Store to point of coherency, and invalidate from cache
Common::DataCacheLineCleanAndInvalidateByVAToPoC(host_ptr, block_size);
};
return PerformCacheOperation(process, dest_addr, size, perform);
}
void MarkRegionDebug(VAddr vaddr, u64 size, bool debug) {
if (vaddr == 0) {
return;
@ -786,6 +836,21 @@ void Memory::ZeroBlock(const Kernel::KProcess& process, VAddr dest_addr, const s
impl->ZeroBlock(process, dest_addr, size);
}
Result Memory::InvalidateDataCache(const Kernel::KProcess& process, VAddr dest_addr,
const std::size_t size) {
return impl->InvalidateDataCache(process, dest_addr, size);
}
Result Memory::StoreDataCache(const Kernel::KProcess& process, VAddr dest_addr,
const std::size_t size) {
return impl->StoreDataCache(process, dest_addr, size);
}
Result Memory::FlushDataCache(const Kernel::KProcess& process, VAddr dest_addr,
const std::size_t size) {
return impl->FlushDataCache(process, dest_addr, size);
}
void Memory::RasterizerMarkRegionCached(VAddr vaddr, u64 size, bool cached) {
impl->RasterizerMarkRegionCached(vaddr, size, cached);
}

34
src/core/memory.h
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@ -7,6 +7,7 @@
#include <memory>
#include <string>
#include "common/common_types.h"
#include "core/hle/result.h"
namespace Common {
struct PageTable;
@ -449,6 +450,39 @@ public:
*/
void ZeroBlock(const Kernel::KProcess& process, VAddr dest_addr, std::size_t size);
/**
* Invalidates a range of bytes within the current process' address space at the specified
* virtual address.
*
* @param process The process that will have data invalidated within its address space.
* @param dest_addr The destination virtual address to invalidate the data from.
* @param size The size of the range to invalidate, in bytes.
*
*/
Result InvalidateDataCache(const Kernel::KProcess& process, VAddr dest_addr, std::size_t size);
/**
* Stores a range of bytes within the current process' address space at the specified
* virtual address.
*
* @param process The process that will have data stored within its address space.
* @param dest_addr The destination virtual address to store the data from.
* @param size The size of the range to store, in bytes.
*
*/
Result StoreDataCache(const Kernel::KProcess& process, VAddr dest_addr, std::size_t size);
/**
* Flushes a range of bytes within the current process' address space at the specified
* virtual address.
*
* @param process The process that will have data flushed within its address space.
* @param dest_addr The destination virtual address to flush the data from.
* @param size The size of the range to flush, in bytes.
*
*/
Result FlushDataCache(const Kernel::KProcess& process, VAddr dest_addr, std::size_t size);
/**
* Marks each page within the specified address range as cached or uncached.
*