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kernel: implement FlushProcessDataCache

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This commit is contained in:
Liam
2022-11-12 11:02:07 -05:00
parent 70ea1c2000
commit 651f6598ac
4 changed files with 125 additions and 8 deletions
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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.
*