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thermosphere: rewrite core_ctx

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This commit is contained in:
TuxSH 2020-02-21 00:13:40 +00:00
parent ea7d161755
commit 37a889ccb2
4 changed files with 148 additions and 59 deletions
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57
thermosphere/src/core_ctx.h
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@ -1,57 +0,0 @@
/*
* Copyright (c) 2019 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 <stdatomic.h>
#include <assert.h>
#include "utils.h"
struct ExceptionStackFrame;
typedef struct ALIGN(64) CoreCtx {
// Most likely only just read (assume cache line size of at most 64 bytes):
u64 kernelArgument; // @0x08
uintptr_t kernelEntrypoint; // @0x10
u32 coreId; // @0x18
bool isBootCore; // @0x1D
bool warmboot; // @0x1E
// Debug features
bool wasPaused; // @0x1F
uintptr_t steppingRangeStartAddr; // @0x20
uintptr_t steppingRangeEndAddr; // @0x28
// Most likely written to:
ALIGN(64) struct ExceptionStackFrame *guestFrame; // @0x40
// Timer stuff
u64 totalTimeInHypervisor; // @0x50. cntvoff_el2 is updated to that value.
u64 emulPtimerCval; // @0x58. When setting cntp_cval_el0 and on interrupt
} CoreCtx;
/*static_assert(offsetof(CoreCtx, warmboot) == 0x1E, "Wrong definition for CoreCtx");
static_assert(offsetof(CoreCtx, emulPtimerCval) == 0x58, "Wrong definition for CoreCtx");
static_assert(offsetof(CoreCtx, executedFunctionSync) == 0x78, "Wrong definition for CoreCtx");
static_assert(offsetof(CoreCtx, setWayCounter) == 0x7C, "Wrong definition for CoreCtx");*/
extern CoreCtx g_coreCtxs[4];
register CoreCtx *currentCoreCtx asm("x18");
void coreCtxInit(u32 coreId, bool isBootCore, u64 argument);
void setCurrentCoreActive(void);
u32 getActiveCoreMask(void);

38
thermosphere/src/hvisor_core_context.cpp Normal file
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@ -0,0 +1,38 @@
/*
* Copyright (c) 2019-2020 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 "hvisor_core_context.hpp"
#include "cpu/hvisor_cpu_instructions.hpp"
namespace ams::hvisor {
std::array<CoreContext, MAX_CORE> CoreContext::instances{};
std::atomic<u32> CoreContext::activeCoreMask{};
bool CoreContext::coldboot = true;
void CoreContext::InitializeCoreInstance(u32 coreId, bool isBootCore, u64 argument)
{
CoreContext &instance = instances[coreId];
instance.m_coreId = coreId;
instance.m_bootCore = isBootCore;
instance.m_kernelArgument = argument;
if (isBootCore && instance.m_kernelEntrypoint == 0) {
instance.m_kernelEntrypoint = initialKernelEntrypoint;
}
currentCoreCtx = &instance;
cpu::dmb();
}
}

108
thermosphere/src/hvisor_core_context.hpp Normal file
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@ -0,0 +1,108 @@
/*
* Copyright (c) 2019-2020 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 "defines.hpp"
namespace ams::hvisor {
struct ExceptionStackFrame;
class CoreContext;
register CoreContext *currentCoreCtx asm("x18");
class alignas(64) CoreContext final {
// This should be 64-byte big
NON_COPYABLE(CoreContext);
NON_MOVEABLE(CoreContext);
private:
static std::array<CoreContext, MAX_CORE> instances;
static std::atomic<u32> activeCoreMask;
static bool coldboot; // "coldboot" to be 'true' on init & thus not in BSS
// start.s
static uintptr_t initialKernelEntrypoint;
private:
ExceptionStackFrame *m_guestFrame = nullptr;
u64 m_kernelArgument = 0;
uintptr_t m_kernelEntrypoint = 0;
u32 m_coreId = 0;
bool m_bootCore = false;
// Debug features
bool m_wasPaused = false;
uintptr_t m_steppingRangeStartAddr = 0;
uintptr_t m_steppingRangeEndAddr = 0;
// Timer stuff
u64 m_totalTimeInHypervisor = 0;
u64 m_emulPtimerCval = 0;
private:
constexpr CoreContext() = default;
public:
static void InitializeCoreInstance(u32 coreId, bool isBootCore, u64 argument);
static CoreContext &GetInstanceFor(u32 coreId) { return instances[coreId]; }
static u32 GetActiveCoreMask() { return activeCoreMask.load(); }
static u32 SetCurrentCoreActive()
{
activeCoreMask |= BIT(currentCoreCtx->m_coreId);
}
static bool IsColdboot() { return coldboot; }
public:
constexpr ExceptionStackFrame *GetGuestFrame() const { return m_guestFrame; }
constexpr void SetGuestFrame(ExceptionStackFrame *frame) { m_guestFrame = frame; }
constexpr u64 GetKernelArgument() const { return m_kernelArgument; }
constexpr u64 GetKernelEntrypoint() const { return m_kernelEntrypoint; }
constexpr u32 GetCoreId() const { return m_coreId; }
constexpr u64 SetWarmboot(uintptr_t ep)
{
// No race possible, only possible transition is 1->0 and we only really check IsColdboot() at init time
// And CPU_SUSPEND should only be called with only one core left.
coldboot = false;
m_kernelEntrypoint = ep;
}
constexpr bool WasPaused() const { return m_wasPaused; }
constexpr void SetPausedFlag(bool wasPaused) { m_wasPaused = wasPaused; }
constexpr auto GetSteppingRange() const
{
return std::tuple{m_steppingRangeStartAddr, m_steppingRangeEndAddr};
}
constexpr void SetSteppingRange(uintptr_t startAddr, uintptr_t endAddr)
{
m_steppingRangeStartAddr = startAddr;
m_steppingRangeEndAddr = endAddr;
}
constexpr u64 GetTotalTimeInHypervisor() const { return m_totalTimeInHypervisor; }
constexpr void IncrementTotalTimeInHypervisor(u64 timeDelta) { m_totalTimeInHypervisor += timeDelta; }
constexpr u64 GetEmulPtimerCval() const { return m_emulPtimerCval; }
constexpr void SetEmulPtimerCval(u64 cval) { m_emulPtimerCval = cval; }
};
}

4
thermosphere/src/start.s
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@ -25,8 +25,8 @@ _start:
b start
b start2
.global g_initialKernelEntrypoint
g_initialKernelEntrypoint:
.global _ZN3ams6hvisor11CoreContext23initialKernelEntrypointE
_ZN3ams6hvisor11CoreContext23initialKernelEntrypointE:
.quad 0
start: