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kern: SvcChangeKernelTraceState

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This commit is contained in:
Michael Scire 2020-07-31 17:01:01 -07:00 committed by SciresM
parent 89f1c0ce33
commit f9d68db3f6
10 changed files with 279 additions and 45 deletions
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3
libraries/libmesosphere/include/mesosphere.hpp
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@ -27,6 +27,9 @@
#include <mesosphere/kern_initial_process.hpp>
#include <mesosphere/kern_k_exception_context.hpp>
/* Tracing functionality. */
#include <mesosphere/kern_k_trace.hpp>
/* Core pre-initialization includes. */
#include <mesosphere/kern_select_cpu.hpp>
#include <mesosphere/kern_select_system_control.hpp>

2
libraries/libmesosphere/include/mesosphere/kern_common.hpp
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@ -37,4 +37,6 @@ namespace ams::kern {
#define MESOSPHERE_ENABLE_DEBUG_PRINT
#endif
#define MESOSPHERE_BUILD_FOR_TRACING
#include <mesosphere/svc/kern_svc_results.hpp>

14
libraries/libmesosphere/include/mesosphere/kern_k_memory_layout.hpp
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@ -100,8 +100,6 @@ namespace ams::kern {
KMemoryRegionType_DramSystemNonSecurePool = 0xDA6 | KMemoryRegionAttr_NoUserMap | KMemoryRegionAttr_LinearMapped,
KMemoryRegionType_DramSystemPool = 0x13A6 | KMemoryRegionAttr_NoUserMap | KMemoryRegionAttr_LinearMapped | KMemoryRegionAttr_CarveoutProtected,
KMemoryRegionType_DramKernel = 0xE | KMemoryRegionAttr_NoUserMap | KMemoryRegionAttr_CarveoutProtected,
KMemoryRegionType_DramKernelCode = 0xCE | KMemoryRegionAttr_NoUserMap | KMemoryRegionAttr_CarveoutProtected,
KMemoryRegionType_DramKernelSlab = 0x14E | KMemoryRegionAttr_NoUserMap | KMemoryRegionAttr_CarveoutProtected,
@ -526,6 +524,10 @@ namespace ams::kern {
return *GetVirtualMemoryRegionTree().FindFirstRegionByType(KMemoryRegionType_KernelTemp);
}
static NOINLINE KMemoryRegion &GetKernelTraceBufferRegion() {
return *GetVirtualLinearMemoryRegionTree().FindFirstRegionByType(KMemoryRegionType_VirtualKernelTraceBuffer);
}
static NOINLINE KMemoryRegion &GetVirtualLinearRegion(KVirtualAddress address) {
return *GetVirtualLinearMemoryRegionTree().FindContainingRegion(GetInteger(address));
}
@ -730,6 +732,10 @@ namespace ams::kern {
return GetVirtualLinearExtents(GetLinearRegionPhysicalExtents());
}
static NOINLINE auto GetMainMemoryPhysicalExtents() {
return GetPhysicalMemoryRegionTree().GetDerivedRegionExtents(KMemoryRegionType_Dram);
}
static NOINLINE auto GetCarveoutRegionExtents() {
return GetPhysicalMemoryRegionTree().GetDerivedRegionExtents(KMemoryRegionAttr_CarveoutProtected);
}
@ -777,6 +783,10 @@ namespace ams::kern {
static NOINLINE auto GetKernelApplicationPoolRegionPhysicalExtents() {
return GetPhysicalMemoryRegionTree().GetDerivedRegionExtents(KMemoryRegionType_DramApplicationPool);
}
static NOINLINE auto GetKernelTraceBufferRegionPhysicalExtents() {
return GetPhysicalMemoryRegionTree().GetDerivedRegionExtents(KMemoryRegionType_KernelTraceBuffer);
}
};

57
libraries/libmesosphere/include/mesosphere/kern_k_trace.hpp Normal file
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@ -0,0 +1,57 @@
/*
* Copyright (c) 2018-2020 Atmosphère-NX
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include <mesosphere/kern_common.hpp>
#include <mesosphere/kern_k_spin_lock.hpp>
namespace ams::kern {
#if defined(MESOSPHERE_BUILD_FOR_TRACING)
constexpr inline bool IsKTraceEnabled = true;
#else
constexpr inline bool IsKTraceEnabled = false;
#endif
constexpr inline size_t KTraceBufferSize = IsKTraceEnabled ? 16_MB : 0;
static_assert(IsKTraceEnabled || !IsKTraceEnabled);
class KTrace {
private:
static bool s_is_active;
public:
static void Initialize(KVirtualAddress address, size_t size);
static void Start();
static void Stop();
static ALWAYS_INLINE bool IsActive() { return s_is_active; }
};
}
#define MESOSPHERE_KTRACE_RESUME() \
({ \
if constexpr (::ams::kern::IsKTraceEnabled) { \
::ams::kern::KTrace::Start(); \
} \
})
#define MESOSPHERE_KTRACE_PAUSE() \
({ \
if constexpr (::ams::kern::IsKTraceEnabled) { \
::ams::kern::KTrace::Stop(); \
} \
})

79
libraries/libmesosphere/source/board/nintendo/nx/kern_k_system_control.cpp
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@ -338,39 +338,52 @@ namespace ams::kern::board::nintendo::nx {
}
size_t KSystemControl::Init::GetApplicationPoolSize() {
switch (GetMemoryArrangeForInit()) {
case smc::MemoryArrangement_4GB:
default:
return 3285_MB;
case smc::MemoryArrangement_4GBForAppletDev:
return 2048_MB;
case smc::MemoryArrangement_4GBForSystemDev:
return 3285_MB;
case smc::MemoryArrangement_6GB:
return 4916_MB;
case smc::MemoryArrangement_6GBForAppletDev:
return 3285_MB;
case smc::MemoryArrangement_8GB:
return 4916_MB;
}
/* Get the base pool size. */
const size_t base_pool_size = [] ALWAYS_INLINE_LAMBDA () -> size_t {
switch (GetMemoryArrangeForInit()) {
case smc::MemoryArrangement_4GB:
default:
return 3285_MB;
case smc::MemoryArrangement_4GBForAppletDev:
return 2048_MB;
case smc::MemoryArrangement_4GBForSystemDev:
return 3285_MB;
case smc::MemoryArrangement_6GB:
return 4916_MB;
case smc::MemoryArrangement_6GBForAppletDev:
return 3285_MB;
case smc::MemoryArrangement_8GB:
return 4916_MB;
}
}();
/* Return (possibly) adjusted size. */
return base_pool_size;
}
size_t KSystemControl::Init::GetAppletPoolSize() {
switch (GetMemoryArrangeForInit()) {
case smc::MemoryArrangement_4GB:
default:
return 507_MB;
case smc::MemoryArrangement_4GBForAppletDev:
return 1554_MB;
case smc::MemoryArrangement_4GBForSystemDev:
return 448_MB;
case smc::MemoryArrangement_6GB:
return 562_MB;
case smc::MemoryArrangement_6GBForAppletDev:
return 2193_MB;
case smc::MemoryArrangement_8GB:
return 2193_MB;
}
/* Get the base pool size. */
const size_t base_pool_size = [] ALWAYS_INLINE_LAMBDA () -> size_t {
switch (GetMemoryArrangeForInit()) {
case smc::MemoryArrangement_4GB:
default:
return 507_MB;
case smc::MemoryArrangement_4GBForAppletDev:
return 1554_MB;
case smc::MemoryArrangement_4GBForSystemDev:
return 448_MB;
case smc::MemoryArrangement_6GB:
return 562_MB;
case smc::MemoryArrangement_6GBForAppletDev:
return 2193_MB;
case smc::MemoryArrangement_8GB:
return 2193_MB;
}
}();
/* Return (possibly) adjusted size. */
constexpr size_t ExtraSystemMemoryForAtmosphere = 33_MB;
return base_pool_size - ExtraSystemMemoryForAtmosphere - KTraceBufferSize;
}
size_t KSystemControl::Init::GetMinimumNonSecureSystemPoolSize() {
@ -461,6 +474,12 @@ namespace ams::kern::board::nintendo::nx {
g_secure_applet_memory_address = Kernel::GetMemoryManager().AllocateContinuous(SecureAppletMemorySize / PageSize, 1, SecureAppletAllocateOption);
MESOSPHERE_ABORT_UNLESS(g_secure_applet_memory_address != Null<KVirtualAddress>);
}
/* Initialize KTrace. */
if constexpr (IsKTraceEnabled) {
const auto &ktrace = KMemoryLayout::GetKernelTraceBufferRegion();
KTrace::Initialize(ktrace.GetAddress(), ktrace.GetSize());
}
}
u32 KSystemControl::GetInitialProcessBinaryPool() {

6
libraries/libmesosphere/source/kern_k_memory_layout.cpp
View File

@ -227,7 +227,9 @@ namespace ams::kern {
void SetupPoolPartitionMemoryRegions() {
/* Start by identifying the extents of the DRAM memory region. */
const auto dram_extents = KMemoryLayout::GetPhysicalMemoryRegionTree().GetDerivedRegionExtents(KMemoryRegionType_Dram);
const auto dram_extents = KMemoryLayout::GetMainMemoryPhysicalExtents();
const uintptr_t pool_end = dram_extents.GetEndAddress() - KTraceBufferSize;
/* Get Application and Applet pool sizes. */
const size_t application_pool_size = KSystemControl::Init::GetApplicationPoolSize();
@ -242,7 +244,7 @@ namespace ams::kern {
const uintptr_t pool_partitions_start = KMemoryLayout::GetPhysicalMemoryRegionTree().FindFirstRegionByTypeAttr(KMemoryRegionType_DramPoolPartition)->GetAddress();
/* Decide on starting addresses for our pools. */
const uintptr_t application_pool_start = dram_extents.GetEndAddress() - application_pool_size;
const uintptr_t application_pool_start = pool_end - application_pool_size;
const uintptr_t applet_pool_start = application_pool_start - applet_pool_size;
const uintptr_t unsafe_system_pool_start = std::min(kernel_dram_start + CarveoutSizeMax, util::AlignDown(applet_pool_start - unsafe_system_pool_min_size, CarveoutAlignment));
const size_t unsafe_system_pool_size = applet_pool_start - unsafe_system_pool_start;

104
libraries/libmesosphere/source/kern_k_trace.cpp Normal file
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@ -0,0 +1,104 @@
/*
* Copyright (c) 2018-2020 Atmosphère-NX
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <mesosphere.hpp>
namespace ams::kern {
/* Static initializations. */
constinit bool KTrace::s_is_active = false;
namespace {
constinit KSpinLock g_ktrace_lock;
constinit KVirtualAddress g_ktrace_buffer_address = Null<KVirtualAddress>;
constinit size_t g_ktrace_buffer_size = 0;
struct KTraceHeader {
u32 magic;
u32 offset;
u32 index;
u32 count;
static constexpr u32 Magic = util::FourCC<'K','T','R','0'>::Code;
};
static_assert(util::is_pod<KTraceHeader>::value);
struct KTraceRecord {
u8 core_id;
u8 type;
u16 process_id;
u32 thread_id;
u64 tick;
u64 data[6];
};
static_assert(util::is_pod<KTraceRecord>::value);
static_assert(sizeof(KTraceRecord) == 0x40);
}
void KTrace::Initialize(KVirtualAddress address, size_t size) {
/* Only perform tracing when on development hardware. */
if (KTargetSystem::IsDebugMode()) {
const size_t offset = util::AlignUp(sizeof(KTraceHeader), sizeof(KTraceRecord));
if (offset < size) {
/* Clear the trace buffer. */
std::memset(GetVoidPointer(address), 0, size);
/* Initialize the KTrace header. */
KTraceHeader *header = GetPointer<KTraceHeader>(address);
header->magic = KTraceHeader::Magic;
header->offset = offset;
header->index = 0;
header->count = (size - offset) / sizeof(KTraceRecord);
/* Set the global data. */
g_ktrace_buffer_address = address;
g_ktrace_buffer_size = size;
}
}
}
void KTrace::Start() {
if (g_ktrace_buffer_address != Null<KVirtualAddress>) {
/* Get exclusive access to the trace buffer. */
KScopedInterruptDisable di;
KScopedSpinLock lk(g_ktrace_lock);
/* Reset the header. */
KTraceHeader *header = GetPointer<KTraceHeader>(g_ktrace_buffer_address);
header->index = 0;
/* Reset the records. */
KTraceRecord *records = GetPointer<KTraceRecord>(g_ktrace_buffer_address + header->offset);
std::memset(records, 0, sizeof(*records) * header->count);
/* Note that we're active. */
s_is_active = true;
}
}
void KTrace::Stop() {
if (g_ktrace_buffer_address != Null<KVirtualAddress>) {
/* Get exclusive access to the trace buffer. */
KScopedInterruptDisable di;
KScopedSpinLock lk(g_ktrace_lock);
/* Note that we're paused. */
s_is_active = false;
}
}
}

4
libraries/libmesosphere/source/kern_kernel.cpp
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@ -157,6 +157,10 @@ namespace ams::kern {
PrintMemoryRegion(" SystemUnsafe", KMemoryLayout::GetKernelSystemNonSecurePoolRegionPhysicalExtents());
PrintMemoryRegion(" Applet", KMemoryLayout::GetKernelAppletPoolRegionPhysicalExtents());
PrintMemoryRegion(" Application", KMemoryLayout::GetKernelApplicationPoolRegionPhysicalExtents());
if constexpr (IsKTraceEnabled) {
MESOSPHERE_LOG(" Debug\n");
PrintMemoryRegion(" Trace Buffer", KMemoryLayout::GetKernelTraceBufferRegionPhysicalExtents());
}
MESOSPHERE_LOG("\n");
}

4
libraries/libmesosphere/source/svc/kern_svc_kernel_debug.cpp
View File

@ -39,12 +39,12 @@ namespace ams::kern::svc {
switch (kern_trace_state) {
case ams::svc::KernelTraceState_Enabled:
{
/* TODO: MESOSPHERE_KTRACE_RESUME(); */
MESOSPHERE_KTRACE_RESUME();
}
break;
case ams::svc::KernelTraceState_Disabled:
{
/* TODO: MESOSPHERE_KTRACE_PAUSE(); */
MESOSPHERE_KTRACE_PAUSE();
}
break;
default:

51
mesosphere/kernel/source/arch/arm64/init/kern_init_core.cpp
View File

@ -183,6 +183,11 @@ namespace ams::kern::init {
MESOSPHERE_INIT_ABORT_UNLESS(KMemoryLayout::GetVirtualMemoryRegionTree().Insert(GetInteger(misc_unk_debug_virt_addr), MiscUnknownDebugRegionSize, KMemoryRegionType_KernelMiscUnknownDebug));
ttbr1_table.Map(misc_unk_debug_virt_addr, MiscUnknownDebugRegionSize, misc_unk_debug_phys_addr, KernelRoDataAttribute, g_initial_page_allocator);
}
constexpr size_t MiscUnknownDebugRegionSize = PageSize;
constexpr size_t MiscUnknownDebugRegionAlign = PageSize;
const KVirtualAddress misc_unk_debug_virt_addr = KMemoryLayout::GetVirtualMemoryRegionTree().GetRandomAlignedRegionWithGuard(MiscUnknownDebugRegionSize, MiscUnknownDebugRegionAlign, KMemoryRegionType_KernelMisc, PageSize);
MESOSPHERE_INIT_ABORT_UNLESS(KMemoryLayout::GetVirtualMemoryRegionTree().Insert(GetInteger(misc_unk_debug_virt_addr), MiscUnknownDebugRegionSize, KMemoryRegionType_KernelMiscUnknownDebug));
ttbr1_table.Map(misc_unk_debug_virt_addr, MiscUnknownDebugRegionSize, misc_unk_debug_phys_addr, KernelRoDataAttribute, g_initial_page_allocator);
/* Setup board-specific device physical regions. */
SetupDevicePhysicalMemoryRegions();
@ -241,6 +246,14 @@ namespace ams::kern::init {
/* Insert a physical region for the kernel page table heap region */
MESOSPHERE_INIT_ABORT_UNLESS(KMemoryLayout::GetPhysicalMemoryRegionTree().Insert(GetInteger(slab_end_phys_addr), page_table_heap_size, KMemoryRegionType_DramKernelPtHeap));
/* Insert a physical region for the kernel trace buffer. */
static_assert(!IsKTraceEnabled || KTraceBufferSize > 0);
if constexpr (IsKTraceEnabled) {
const auto dram_extents = KMemoryLayout::GetMainMemoryPhysicalExtents();
const KPhysicalAddress ktrace_buffer_phys_addr = dram_extents.GetEndAddress() - KTraceBufferSize;
MESOSPHERE_INIT_ABORT_UNLESS(KMemoryLayout::GetPhysicalMemoryRegionTree().Insert(GetInteger(ktrace_buffer_phys_addr), KTraceBufferSize, KMemoryRegionType_KernelTraceBuffer));
}
/* All DRAM regions that we haven't tagged by this point will be mapped under the linear mapping. Tag them. */
for (auto &region : KMemoryLayout::GetPhysicalMemoryRegionTree()) {
if (region.GetType() == KMemoryRegionType_Dram) {
@ -258,17 +271,37 @@ namespace ams::kern::init {
const uintptr_t linear_region_phys_to_virt_diff = GetInteger(linear_region_start) - GetInteger(aligned_linear_phys_start);
/* Map and create regions for all the linearly-mapped data. */
for (auto &region : KMemoryLayout::GetPhysicalMemoryRegionTree()) {
if (!region.HasTypeAttribute(KMemoryRegionAttr_LinearMapped)) {
continue;
{
uintptr_t cur_phys_addr = 0;
uintptr_t cur_size = 0;
for (auto &region : KMemoryLayout::GetPhysicalMemoryRegionTree()) {
if (!region.HasTypeAttribute(KMemoryRegionAttr_LinearMapped)) {
continue;
}
if (cur_phys_addr == 0) {
cur_phys_addr = region.GetAddress();
cur_size = region.GetSize();
} else if (cur_phys_addr + cur_size == region.GetAddress()) {
cur_size += region.GetSize();
} else {
const uintptr_t cur_virt_addr = cur_phys_addr + linear_region_phys_to_virt_diff;
ttbr1_table.Map(cur_virt_addr, cur_size, cur_phys_addr, KernelRwDataAttribute, g_initial_page_allocator);
cur_phys_addr = region.GetAddress();
cur_size = region.GetSize();
}
const uintptr_t region_virt_addr = region.GetAddress() + linear_region_phys_to_virt_diff;
MESOSPHERE_INIT_ABORT_UNLESS(KMemoryLayout::GetVirtualMemoryRegionTree().Insert(region_virt_addr, region.GetSize(), GetTypeForVirtualLinearMapping(region.GetType())));
region.SetPairAddress(region_virt_addr);
KMemoryLayout::GetVirtualMemoryRegionTree().FindContainingRegion(region_virt_addr)->SetPairAddress(region.GetAddress());
}
const uintptr_t region_virt_addr = region.GetAddress() + linear_region_phys_to_virt_diff;
ttbr1_table.Map(region_virt_addr, region.GetSize(), region.GetAddress(), KernelRwDataAttribute, g_initial_page_allocator);
MESOSPHERE_INIT_ABORT_UNLESS(KMemoryLayout::GetVirtualMemoryRegionTree().Insert(region_virt_addr, region.GetSize(), GetTypeForVirtualLinearMapping(region.GetType())));
region.SetPairAddress(region_virt_addr);
KMemoryLayout::GetVirtualMemoryRegionTree().FindContainingRegion(region_virt_addr)->SetPairAddress(region.GetAddress());
/* Map the last block, which we may have skipped. */
if (cur_phys_addr != 0) {
const uintptr_t cur_virt_addr = cur_phys_addr + linear_region_phys_to_virt_diff;
ttbr1_table.Map(cur_virt_addr, cur_size, cur_phys_addr, KernelRwDataAttribute, g_initial_page_allocator);
}
}
/* Create regions for and map all core-specific stacks. */