From 6d2734a074f44a24129db850339677d8d7b436aa Mon Sep 17 00:00:00 2001 From: Subv Date: Fri, 21 Jul 2017 21:17:57 -0500 Subject: [PATCH 1/7] Kernel/Memory: Give each Process its own page table. The loader is in charge of setting the newly created process's page table as the main one during the loading process. --- src/core/core.cpp | 1 - src/core/hle/kernel/vm_manager.cpp | 13 +++-- src/core/hle/kernel/vm_manager.h | 6 ++- src/core/loader/3dsx.cpp | 1 + src/core/loader/elf.cpp | 1 + src/core/loader/ncch.cpp | 1 + src/core/memory.cpp | 87 +++++------------------------- src/core/memory.h | 60 ++++++++++++++++++++- src/core/memory_setup.h | 10 ++-- 9 files changed, 93 insertions(+), 87 deletions(-) diff --git a/src/core/core.cpp b/src/core/core.cpp index 5332318cff..59b8768e71 100644 --- a/src/core/core.cpp +++ b/src/core/core.cpp @@ -137,7 +137,6 @@ void System::Reschedule() { } System::ResultStatus System::Init(EmuWindow* emu_window, u32 system_mode) { - Memory::InitMemoryMap(); LOG_DEBUG(HW_Memory, "initialized OK"); if (Settings::values.use_cpu_jit) { diff --git a/src/core/hle/kernel/vm_manager.cpp b/src/core/hle/kernel/vm_manager.cpp index cef1f7fa83..7a007c0656 100644 --- a/src/core/hle/kernel/vm_manager.cpp +++ b/src/core/hle/kernel/vm_manager.cpp @@ -56,6 +56,10 @@ void VMManager::Reset() { initial_vma.size = MAX_ADDRESS; vma_map.emplace(initial_vma.base, initial_vma); + page_table.pointers.fill(nullptr); + page_table.attributes.fill(Memory::PageType::Unmapped); + page_table.cached_res_count.fill(0); + UpdatePageTableForVMA(initial_vma); } @@ -328,16 +332,17 @@ VMManager::VMAIter VMManager::MergeAdjacent(VMAIter iter) { void VMManager::UpdatePageTableForVMA(const VirtualMemoryArea& vma) { switch (vma.type) { case VMAType::Free: - Memory::UnmapRegion(vma.base, vma.size); + Memory::UnmapRegion(page_table, vma.base, vma.size); break; case VMAType::AllocatedMemoryBlock: - Memory::MapMemoryRegion(vma.base, vma.size, vma.backing_block->data() + vma.offset); + Memory::MapMemoryRegion(page_table, vma.base, vma.size, + vma.backing_block->data() + vma.offset); break; case VMAType::BackingMemory: - Memory::MapMemoryRegion(vma.base, vma.size, vma.backing_memory); + Memory::MapMemoryRegion(page_table, vma.base, vma.size, vma.backing_memory); break; case VMAType::MMIO: - Memory::MapIoRegion(vma.base, vma.size, vma.mmio_handler); + Memory::MapIoRegion(page_table, vma.base, vma.size, vma.mmio_handler); break; } } diff --git a/src/core/hle/kernel/vm_manager.h b/src/core/hle/kernel/vm_manager.h index 38e0d74d0d..1302527bb9 100644 --- a/src/core/hle/kernel/vm_manager.h +++ b/src/core/hle/kernel/vm_manager.h @@ -9,6 +9,7 @@ #include #include "common/common_types.h" #include "core/hle/result.h" +#include "core/memory.h" #include "core/mmio.h" namespace Kernel { @@ -102,7 +103,6 @@ struct VirtualMemoryArea { * - http://duartes.org/gustavo/blog/post/page-cache-the-affair-between-memory-and-files/ */ class VMManager final { - // TODO(yuriks): Make page tables switchable to support multiple VMManagers public: /** * The maximum amount of address space managed by the kernel. Addresses above this are never @@ -184,6 +184,10 @@ public: /// Dumps the address space layout to the log, for debugging void LogLayout(Log::Level log_level) const; + /// Each VMManager has its own page table, which is set as the main one when the owning process + /// is scheduled. + Memory::PageTable page_table; + private: using VMAIter = decltype(vma_map)::iterator; diff --git a/src/core/loader/3dsx.cpp b/src/core/loader/3dsx.cpp index 74e3364874..69cdc0867e 100644 --- a/src/core/loader/3dsx.cpp +++ b/src/core/loader/3dsx.cpp @@ -270,6 +270,7 @@ ResultStatus AppLoader_THREEDSX::Load() { Kernel::g_current_process = Kernel::Process::Create(std::move(codeset)); Kernel::g_current_process->svc_access_mask.set(); Kernel::g_current_process->address_mappings = default_address_mappings; + Memory::current_page_table = &Kernel::g_current_process->vm_manager.page_table; // Attach the default resource limit (APPLICATION) to the process Kernel::g_current_process->resource_limit = diff --git a/src/core/loader/elf.cpp b/src/core/loader/elf.cpp index cfcde91673..2f27606a18 100644 --- a/src/core/loader/elf.cpp +++ b/src/core/loader/elf.cpp @@ -397,6 +397,7 @@ ResultStatus AppLoader_ELF::Load() { Kernel::g_current_process = Kernel::Process::Create(std::move(codeset)); Kernel::g_current_process->svc_access_mask.set(); Kernel::g_current_process->address_mappings = default_address_mappings; + Memory::current_page_table = &Kernel::g_current_process->vm_manager.page_table; // Attach the default resource limit (APPLICATION) to the process Kernel::g_current_process->resource_limit = diff --git a/src/core/loader/ncch.cpp b/src/core/loader/ncch.cpp index 7aff7f29b3..79ea501471 100644 --- a/src/core/loader/ncch.cpp +++ b/src/core/loader/ncch.cpp @@ -172,6 +172,7 @@ ResultStatus AppLoader_NCCH::LoadExec() { codeset->memory = std::make_shared>(std::move(code)); Kernel::g_current_process = Kernel::Process::Create(std::move(codeset)); + Memory::current_page_table = &Kernel::g_current_process->vm_manager.page_table; // Attach a resource limit to the process based on the resource limit category Kernel::g_current_process->resource_limit = diff --git a/src/core/memory.cpp b/src/core/memory.cpp index 65649d9d76..ea46b6ead8 100644 --- a/src/core/memory.cpp +++ b/src/core/memory.cpp @@ -11,75 +11,18 @@ #include "core/hle/kernel/process.h" #include "core/memory.h" #include "core/memory_setup.h" -#include "core/mmio.h" #include "video_core/renderer_base.h" #include "video_core/video_core.h" namespace Memory { -enum class PageType { - /// Page is unmapped and should cause an access error. - Unmapped, - /// Page is mapped to regular memory. This is the only type you can get pointers to. - Memory, - /// Page is mapped to regular memory, but also needs to check for rasterizer cache flushing and - /// invalidation - RasterizerCachedMemory, - /// Page is mapped to a I/O region. Writing and reading to this page is handled by functions. - Special, - /// Page is mapped to a I/O region, but also needs to check for rasterizer cache flushing and - /// invalidation - RasterizerCachedSpecial, -}; - -struct SpecialRegion { - VAddr base; - u32 size; - MMIORegionPointer handler; -}; - -/** - * A (reasonably) fast way of allowing switchable and remappable process address spaces. It loosely - * mimics the way a real CPU page table works, but instead is optimized for minimal decoding and - * fetching requirements when accessing. In the usual case of an access to regular memory, it only - * requires an indexed fetch and a check for NULL. - */ -struct PageTable { - /** - * Array of memory pointers backing each page. An entry can only be non-null if the - * corresponding entry in the `attributes` array is of type `Memory`. - */ - std::array pointers; - - /** - * Contains MMIO handlers that back memory regions whose entries in the `attribute` array is of - * type `Special`. - */ - std::vector special_regions; - - /** - * Array of fine grained page attributes. If it is set to any value other than `Memory`, then - * the corresponding entry in `pointers` MUST be set to null. - */ - std::array attributes; - - /** - * Indicates the number of externally cached resources touching a page that should be - * flushed before the memory is accessed - */ - std::array cached_res_count; -}; - -/// Singular page table used for the singleton process -static PageTable main_page_table; -/// Currently active page table -static PageTable* current_page_table = &main_page_table; +PageTable* current_page_table = nullptr; std::array* GetCurrentPageTablePointers() { return ¤t_page_table->pointers; } -static void MapPages(u32 base, u32 size, u8* memory, PageType type) { +static void MapPages(PageTable& page_table, u32 base, u32 size, u8* memory, PageType type) { LOG_DEBUG(HW_Memory, "Mapping %p onto %08X-%08X", memory, base * PAGE_SIZE, (base + size) * PAGE_SIZE); @@ -90,9 +33,9 @@ static void MapPages(u32 base, u32 size, u8* memory, PageType type) { while (base != end) { ASSERT_MSG(base < PAGE_TABLE_NUM_ENTRIES, "out of range mapping at %08X", base); - current_page_table->attributes[base] = type; - current_page_table->pointers[base] = memory; - current_page_table->cached_res_count[base] = 0; + page_table.attributes[base] = type; + page_table.pointers[base] = memory; + page_table.cached_res_count[base] = 0; base += 1; if (memory != nullptr) @@ -100,30 +43,24 @@ static void MapPages(u32 base, u32 size, u8* memory, PageType type) { } } -void InitMemoryMap() { - main_page_table.pointers.fill(nullptr); - main_page_table.attributes.fill(PageType::Unmapped); - main_page_table.cached_res_count.fill(0); -} - -void MapMemoryRegion(VAddr base, u32 size, u8* target) { +void MapMemoryRegion(PageTable& page_table, VAddr base, u32 size, u8* target) { ASSERT_MSG((size & PAGE_MASK) == 0, "non-page aligned size: %08X", size); ASSERT_MSG((base & PAGE_MASK) == 0, "non-page aligned base: %08X", base); - MapPages(base / PAGE_SIZE, size / PAGE_SIZE, target, PageType::Memory); + MapPages(page_table, base / PAGE_SIZE, size / PAGE_SIZE, target, PageType::Memory); } -void MapIoRegion(VAddr base, u32 size, MMIORegionPointer mmio_handler) { +void MapIoRegion(PageTable& page_table, VAddr base, u32 size, MMIORegionPointer mmio_handler) { ASSERT_MSG((size & PAGE_MASK) == 0, "non-page aligned size: %08X", size); ASSERT_MSG((base & PAGE_MASK) == 0, "non-page aligned base: %08X", base); - MapPages(base / PAGE_SIZE, size / PAGE_SIZE, nullptr, PageType::Special); + MapPages(page_table, base / PAGE_SIZE, size / PAGE_SIZE, nullptr, PageType::Special); - current_page_table->special_regions.emplace_back(SpecialRegion{base, size, mmio_handler}); + page_table.special_regions.emplace_back(SpecialRegion{base, size, mmio_handler}); } -void UnmapRegion(VAddr base, u32 size) { +void UnmapRegion(PageTable& page_table, VAddr base, u32 size) { ASSERT_MSG((size & PAGE_MASK) == 0, "non-page aligned size: %08X", size); ASSERT_MSG((base & PAGE_MASK) == 0, "non-page aligned base: %08X", base); - MapPages(base / PAGE_SIZE, size / PAGE_SIZE, nullptr, PageType::Unmapped); + MapPages(page_table, base / PAGE_SIZE, size / PAGE_SIZE, nullptr, PageType::Unmapped); } /** diff --git a/src/core/memory.h b/src/core/memory.h index c8c56babd9..859a142022 100644 --- a/src/core/memory.h +++ b/src/core/memory.h @@ -7,8 +7,10 @@ #include #include #include +#include #include #include "common/common_types.h" +#include "core/mmio.h" namespace Memory { @@ -21,6 +23,59 @@ const u32 PAGE_MASK = PAGE_SIZE - 1; const int PAGE_BITS = 12; const size_t PAGE_TABLE_NUM_ENTRIES = 1 << (32 - PAGE_BITS); +enum class PageType { + /// Page is unmapped and should cause an access error. + Unmapped, + /// Page is mapped to regular memory. This is the only type you can get pointers to. + Memory, + /// Page is mapped to regular memory, but also needs to check for rasterizer cache flushing and + /// invalidation + RasterizerCachedMemory, + /// Page is mapped to a I/O region. Writing and reading to this page is handled by functions. + Special, + /// Page is mapped to a I/O region, but also needs to check for rasterizer cache flushing and + /// invalidation + RasterizerCachedSpecial, +}; + +struct SpecialRegion { + VAddr base; + u32 size; + MMIORegionPointer handler; +}; + +/** + * A (reasonably) fast way of allowing switchable and remappable process address spaces. It loosely + * mimics the way a real CPU page table works, but instead is optimized for minimal decoding and + * fetching requirements when accessing. In the usual case of an access to regular memory, it only + * requires an indexed fetch and a check for NULL. + */ +struct PageTable { + /** + * Array of memory pointers backing each page. An entry can only be non-null if the + * corresponding entry in the `attributes` array is of type `Memory`. + */ + std::array pointers; + + /** + * Contains MMIO handlers that back memory regions whose entries in the `attribute` array is of + * type `Special`. + */ + std::vector special_regions; + + /** + * Array of fine grained page attributes. If it is set to any value other than `Memory`, then + * the corresponding entry in `pointers` MUST be set to null. + */ + std::array attributes; + + /** + * Indicates the number of externally cached resources touching a page that should be + * flushed before the memory is accessed + */ + std::array cached_res_count; +}; + /// Physical memory regions as seen from the ARM11 enum : PAddr { /// IO register area @@ -126,6 +181,9 @@ enum : VAddr { NEW_LINEAR_HEAP_VADDR_END = NEW_LINEAR_HEAP_VADDR + NEW_LINEAR_HEAP_SIZE, }; +/// Currently active page table +extern PageTable* current_page_table; + bool IsValidVirtualAddress(const VAddr addr); bool IsValidPhysicalAddress(const PAddr addr); @@ -209,4 +267,4 @@ void RasterizerFlushVirtualRegion(VAddr start, u32 size, FlushMode mode); * retrieve the current page table for that purpose. */ std::array* GetCurrentPageTablePointers(); -} +} // namespace Memory diff --git a/src/core/memory_setup.h b/src/core/memory_setup.h index 3fdf3a87dc..c58baa50b6 100644 --- a/src/core/memory_setup.h +++ b/src/core/memory_setup.h @@ -9,24 +9,24 @@ namespace Memory { -void InitMemoryMap(); - /** * Maps an allocated buffer onto a region of the emulated process address space. * + * @param page_table The page table of the emulated process. * @param base The address to start mapping at. Must be page-aligned. * @param size The amount of bytes to map. Must be page-aligned. * @param target Buffer with the memory backing the mapping. Must be of length at least `size`. */ -void MapMemoryRegion(VAddr base, u32 size, u8* target); +void MapMemoryRegion(PageTable& page_table, VAddr base, u32 size, u8* target); /** * Maps a region of the emulated process address space as a IO region. + * @param page_table The page table of the emulated process. * @param base The address to start mapping at. Must be page-aligned. * @param size The amount of bytes to map. Must be page-aligned. * @param mmio_handler The handler that backs the mapping. */ -void MapIoRegion(VAddr base, u32 size, MMIORegionPointer mmio_handler); +void MapIoRegion(PageTable& page_table, VAddr base, u32 size, MMIORegionPointer mmio_handler); -void UnmapRegion(VAddr base, u32 size); +void UnmapRegion(PageTable& page_table, VAddr base, u32 size); } From c34ec5e77cd9e83fcf5c929f3951557d5269b7a6 Mon Sep 17 00:00:00 2001 From: Subv Date: Fri, 21 Jul 2017 21:28:03 -0500 Subject: [PATCH 2/7] Kernel/Memory: Switch the current page table when a new process is scheduled. --- src/core/hle/kernel/thread.cpp | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/src/core/hle/kernel/thread.cpp b/src/core/hle/kernel/thread.cpp index f5f2eb2f7f..b7f094f465 100644 --- a/src/core/hle/kernel/thread.cpp +++ b/src/core/hle/kernel/thread.cpp @@ -178,8 +178,18 @@ static void SwitchContext(Thread* new_thread) { Core::CPU().LoadContext(new_thread->context); Core::CPU().SetCP15Register(CP15_THREAD_URO, new_thread->GetTLSAddress()); + + if (!previous_thread || previous_thread->owner_process != current_thread->owner_process) { + Kernel::g_current_process = current_thread->owner_process; + Memory::current_page_table = &Kernel::g_current_process->vm_manager.page_table; + // We have switched processes and thus, page tables, clear the instruction cache so we + // don't keep stale data from the previous process. + Core::CPU().ClearInstructionCache(); + } } else { current_thread = nullptr; + // Note: We do not reset the current process and current page table when idling because + // technically we haven't changed processes, our threads are just paused. } } From 214150f00c77474927cbdfb1598dbdb2cb4fcf32 Mon Sep 17 00:00:00 2001 From: Subv Date: Fri, 21 Jul 2017 22:22:59 -0500 Subject: [PATCH 3/7] Kernel/Memory: Changed GetPhysicalPointer so that it doesn't go through the current process' page table to obtain a pointer. --- src/core/hle/kernel/memory.cpp | 30 +++------------- src/core/hle/kernel/memory.h | 2 ++ src/core/memory.cpp | 65 ++++++++++++++++++++++++++++++++-- src/core/memory.h | 2 -- 4 files changed, 69 insertions(+), 30 deletions(-) diff --git a/src/core/hle/kernel/memory.cpp b/src/core/hle/kernel/memory.cpp index 496d07cb59..7f27e9655c 100644 --- a/src/core/hle/kernel/memory.cpp +++ b/src/core/hle/kernel/memory.cpp @@ -8,7 +8,6 @@ #include #include #include -#include "audio_core/audio_core.h" #include "common/assert.h" #include "common/common_types.h" #include "common/logging/log.h" @@ -24,7 +23,7 @@ namespace Kernel { -static MemoryRegionInfo memory_regions[3]; +MemoryRegionInfo memory_regions[3]; /// Size of the APPLICATION, SYSTEM and BASE memory regions (respectively) for each system /// memory configuration type. @@ -96,9 +95,6 @@ MemoryRegionInfo* GetMemoryRegion(MemoryRegion region) { } } -std::array vram; -std::array n3ds_extra_ram; - void HandleSpecialMapping(VMManager& address_space, const AddressMapping& mapping) { using namespace Memory; @@ -143,30 +139,14 @@ void HandleSpecialMapping(VMManager& address_space, const AddressMapping& mappin return; } - // TODO(yuriks): Use GetPhysicalPointer when that becomes independent of the virtual - // mappings. - u8* target_pointer = nullptr; - switch (area->paddr_base) { - case VRAM_PADDR: - target_pointer = vram.data(); - break; - case DSP_RAM_PADDR: - target_pointer = AudioCore::GetDspMemory().data(); - break; - case N3DS_EXTRA_RAM_PADDR: - target_pointer = n3ds_extra_ram.data(); - break; - default: - UNREACHABLE(); - } + u8* target_pointer = Memory::GetPhysicalPointer(area->paddr_base + offset_into_region); // TODO(yuriks): This flag seems to have some other effect, but it's unknown what MemoryState memory_state = mapping.unk_flag ? MemoryState::Static : MemoryState::IO; - auto vma = address_space - .MapBackingMemory(mapping.address, target_pointer + offset_into_region, - mapping.size, memory_state) - .Unwrap(); + auto vma = + address_space.MapBackingMemory(mapping.address, target_pointer, mapping.size, memory_state) + .Unwrap(); address_space.Reprotect(vma, mapping.read_only ? VMAPermission::Read : VMAPermission::ReadWrite); } diff --git a/src/core/hle/kernel/memory.h b/src/core/hle/kernel/memory.h index 08c1a99892..da6bb35633 100644 --- a/src/core/hle/kernel/memory.h +++ b/src/core/hle/kernel/memory.h @@ -26,4 +26,6 @@ MemoryRegionInfo* GetMemoryRegion(MemoryRegion region); void HandleSpecialMapping(VMManager& address_space, const AddressMapping& mapping); void MapSharedPages(VMManager& address_space); + +extern MemoryRegionInfo memory_regions[3]; } // namespace Kernel diff --git a/src/core/memory.cpp b/src/core/memory.cpp index ea46b6ead8..4dcbf22748 100644 --- a/src/core/memory.cpp +++ b/src/core/memory.cpp @@ -4,10 +4,12 @@ #include #include +#include "audio_core/audio_core.h" #include "common/assert.h" #include "common/common_types.h" #include "common/logging/log.h" #include "common/swap.h" +#include "core/hle/kernel/memory.h" #include "core/hle/kernel/process.h" #include "core/memory.h" #include "core/memory_setup.h" @@ -16,6 +18,9 @@ namespace Memory { +static std::array vram; +static std::array n3ds_extra_ram; + PageTable* current_page_table = nullptr; std::array* GetCurrentPageTablePointers() { @@ -236,9 +241,63 @@ std::string ReadCString(VAddr vaddr, std::size_t max_length) { } u8* GetPhysicalPointer(PAddr address) { - // TODO(Subv): This call should not go through the application's memory mapping. - boost::optional vaddr = PhysicalToVirtualAddress(address); - return vaddr ? GetPointer(*vaddr) : nullptr; + struct MemoryArea { + PAddr paddr_base; + u32 size; + }; + + static constexpr MemoryArea memory_areas[] = { + {VRAM_PADDR, VRAM_SIZE}, + {IO_AREA_PADDR, IO_AREA_SIZE}, + {DSP_RAM_PADDR, DSP_RAM_SIZE}, + {FCRAM_PADDR, FCRAM_N3DS_SIZE}, + {N3DS_EXTRA_RAM_PADDR, N3DS_EXTRA_RAM_SIZE}, + }; + + const auto area = + std::find_if(std::begin(memory_areas), std::end(memory_areas), [&](const auto& area) { + return address >= area.paddr_base && address < area.paddr_base + area.size; + }); + + if (area == std::end(memory_areas)) { + LOG_ERROR(HW_Memory, "unknown GetPhysicalPointer @ 0x%08X", address); + return nullptr; + } + + if (area->paddr_base == IO_AREA_PADDR) { + LOG_ERROR(HW_Memory, "MMIO mappings are not supported yet. phys_addr=0x%08X", address); + return nullptr; + } + + u32 offset_into_region = address - area->paddr_base; + + u8* target_pointer = nullptr; + switch (area->paddr_base) { + case VRAM_PADDR: + target_pointer = vram.data() + offset_into_region; + break; + case DSP_RAM_PADDR: + target_pointer = AudioCore::GetDspMemory().data() + offset_into_region; + break; + case FCRAM_PADDR: + for (const auto& region : Kernel::memory_regions) { + if (offset_into_region >= region.base && + offset_into_region < region.base + region.size) { + target_pointer = + region.linear_heap_memory->data() + offset_into_region - region.base; + break; + } + } + ASSERT_MSG(target_pointer != nullptr, "Invalid FCRAM address"); + break; + case N3DS_EXTRA_RAM_PADDR: + target_pointer = n3ds_extra_ram.data() + offset_into_region; + break; + default: + UNREACHABLE(); + } + + return target_pointer; } void RasterizerMarkRegionCached(PAddr start, u32 size, int count_delta) { diff --git a/src/core/memory.h b/src/core/memory.h index 859a142022..b228a48c2e 100644 --- a/src/core/memory.h +++ b/src/core/memory.h @@ -227,8 +227,6 @@ boost::optional PhysicalToVirtualAddress(PAddr addr); /** * Gets a pointer to the memory region beginning at the specified physical address. - * - * @note This is currently implemented using PhysicalToVirtualAddress(). */ u8* GetPhysicalPointer(PAddr address); From b178089251200bd0309afcbcb06b43e7c82dc3bc Mon Sep 17 00:00:00 2001 From: Subv Date: Sat, 22 Jul 2017 19:37:26 -0500 Subject: [PATCH 4/7] Kernel/Threads: Don't clear the CPU instruction cache when performing a context switch from an idle thread into a thread in the same process. We were unnecessarily clearing the cache when going from Process A -> Idle -> Process A, this caused extreme performance regressions. --- src/core/hle/kernel/thread.cpp | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/src/core/hle/kernel/thread.cpp b/src/core/hle/kernel/thread.cpp index b7f094f465..f77c39d18d 100644 --- a/src/core/hle/kernel/thread.cpp +++ b/src/core/hle/kernel/thread.cpp @@ -171,6 +171,8 @@ static void SwitchContext(Thread* new_thread) { // Cancel any outstanding wakeup events for this thread CoreTiming::UnscheduleEvent(ThreadWakeupEventType, new_thread->callback_handle); + auto previous_process = Kernel::g_current_process; + current_thread = new_thread; ready_queue.remove(new_thread->current_priority, new_thread); @@ -179,7 +181,7 @@ static void SwitchContext(Thread* new_thread) { Core::CPU().LoadContext(new_thread->context); Core::CPU().SetCP15Register(CP15_THREAD_URO, new_thread->GetTLSAddress()); - if (!previous_thread || previous_thread->owner_process != current_thread->owner_process) { + if (previous_process != current_thread->owner_process) { Kernel::g_current_process = current_thread->owner_process; Memory::current_page_table = &Kernel::g_current_process->vm_manager.page_table; // We have switched processes and thus, page tables, clear the instruction cache so we From f18a176b601c8dc15b372607a4e9f289bdc25ee4 Mon Sep 17 00:00:00 2001 From: Subv Date: Mon, 7 Aug 2017 13:37:16 -0500 Subject: [PATCH 5/7] Kernel/Memory: Make IsValidPhysicalAddress not go through the current process' virtual memory mapping. --- src/core/memory.cpp | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/src/core/memory.cpp b/src/core/memory.cpp index 4dcbf22748..4d16736f56 100644 --- a/src/core/memory.cpp +++ b/src/core/memory.cpp @@ -208,8 +208,7 @@ bool IsValidVirtualAddress(const VAddr vaddr) { } bool IsValidPhysicalAddress(const PAddr paddr) { - boost::optional vaddr = PhysicalToVirtualAddress(paddr); - return vaddr && IsValidVirtualAddress(*vaddr); + return GetPhysicalPointer(paddr) != nullptr; } u8* GetPointer(const VAddr vaddr) { From 3bde97ea059f7bff4e7ebbc59077a1211ae068f7 Mon Sep 17 00:00:00 2001 From: Subv Date: Mon, 7 Aug 2017 14:30:01 -0500 Subject: [PATCH 6/7] Tests/VFP: Use a standalone pagetable for the TestEnvironment memory operations. This fixes building the tests --- src/tests/core/arm/arm_test_common.cpp | 18 ++++++++++++++---- 1 file changed, 14 insertions(+), 4 deletions(-) diff --git a/src/tests/core/arm/arm_test_common.cpp b/src/tests/core/arm/arm_test_common.cpp index 1df6c56773..8384ce7440 100644 --- a/src/tests/core/arm/arm_test_common.cpp +++ b/src/tests/core/arm/arm_test_common.cpp @@ -3,20 +3,30 @@ // Refer to the license.txt file included. #include "core/core.h" +#include "core/memory.h" #include "core/memory_setup.h" #include "tests/core/arm/arm_test_common.h" namespace ArmTests { +static Memory::PageTable page_table; + TestEnvironment::TestEnvironment(bool mutable_memory_) : mutable_memory(mutable_memory_), test_memory(std::make_shared(this)) { - Memory::MapIoRegion(0x00000000, 0x80000000, test_memory); - Memory::MapIoRegion(0x80000000, 0x80000000, test_memory); + + page_table.pointers.fill(nullptr); + page_table.attributes.fill(Memory::PageType::Unmapped); + page_table.cached_res_count.fill(0); + + Memory::MapIoRegion(page_table, 0x00000000, 0x80000000, test_memory); + Memory::MapIoRegion(page_table, 0x80000000, 0x80000000, test_memory); + + Memory::current_page_table = &page_table; } TestEnvironment::~TestEnvironment() { - Memory::UnmapRegion(0x80000000, 0x80000000); - Memory::UnmapRegion(0x00000000, 0x80000000); + Memory::UnmapRegion(page_table, 0x80000000, 0x80000000); + Memory::UnmapRegion(page_table, 0x00000000, 0x80000000); } void TestEnvironment::SetMemory64(VAddr vaddr, u64 value) { From 7a3ab7c63ddcc79e9dfa46ae0347065f66052105 Mon Sep 17 00:00:00 2001 From: Subv Date: Sat, 12 Aug 2017 10:16:35 -0500 Subject: [PATCH 7/7] CPU/Dynarmic: Disable the fast page-table access in dynarmic until it supports switching page tables at runtime. --- src/core/arm/dynarmic/arm_dynarmic.cpp | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/src/core/arm/dynarmic/arm_dynarmic.cpp b/src/core/arm/dynarmic/arm_dynarmic.cpp index 7d2790b08f..f2bd0d2836 100644 --- a/src/core/arm/dynarmic/arm_dynarmic.cpp +++ b/src/core/arm/dynarmic/arm_dynarmic.cpp @@ -56,7 +56,9 @@ static Dynarmic::UserCallbacks GetUserCallbacks( user_callbacks.memory.Write16 = &Memory::Write16; user_callbacks.memory.Write32 = &Memory::Write32; user_callbacks.memory.Write64 = &Memory::Write64; - user_callbacks.page_table = Memory::GetCurrentPageTablePointers(); + // TODO(Subv): Re-add the page table pointers once dynarmic supports switching page tables at + // runtime. + user_callbacks.page_table = nullptr; user_callbacks.coprocessors[15] = std::make_shared(interpeter_state); return user_callbacks; }