mirror of
https://github.com/torvalds/linux.git
synced 2024-12-27 21:33:00 +00:00
82869ac57b
Add support for hibernate/suspend-to-disk. Suspend borrows code from cpu_suspend() to write cpu state onto the stack, before calling swsusp_save() to save the memory image. Restore creates a set of temporary page tables, covering only the linear map, copies the restore code to a 'safe' page, then uses the copy to restore the memory image. The copied code executes in the lower half of the address space, and once complete, restores the original kernel's page tables. It then calls into cpu_resume(), and follows the normal cpu_suspend() path back into the suspend code. To restore a kernel using KASLR, the address of the page tables, and cpu_resume() are stored in the hibernate arch-header and the el2 vectors are pivotted via the 'safe' page in low memory. Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Tested-by: Kevin Hilman <khilman@baylibre.com> # Tested on Juno R2 Signed-off-by: James Morse <james.morse@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
134 lines
5.8 KiB
C
134 lines
5.8 KiB
C
/*
|
|
* Based on arch/arm/kernel/asm-offsets.c
|
|
*
|
|
* Copyright (C) 1995-2003 Russell King
|
|
* 2001-2002 Keith Owens
|
|
* Copyright (C) 2012 ARM Ltd.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that 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 <linux/sched.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/dma-mapping.h>
|
|
#include <linux/kvm_host.h>
|
|
#include <linux/suspend.h>
|
|
#include <asm/thread_info.h>
|
|
#include <asm/memory.h>
|
|
#include <asm/smp_plat.h>
|
|
#include <asm/suspend.h>
|
|
#include <asm/vdso_datapage.h>
|
|
#include <linux/kbuild.h>
|
|
#include <linux/arm-smccc.h>
|
|
|
|
int main(void)
|
|
{
|
|
DEFINE(TSK_ACTIVE_MM, offsetof(struct task_struct, active_mm));
|
|
BLANK();
|
|
DEFINE(TI_FLAGS, offsetof(struct thread_info, flags));
|
|
DEFINE(TI_PREEMPT, offsetof(struct thread_info, preempt_count));
|
|
DEFINE(TI_ADDR_LIMIT, offsetof(struct thread_info, addr_limit));
|
|
DEFINE(TI_TASK, offsetof(struct thread_info, task));
|
|
DEFINE(TI_CPU, offsetof(struct thread_info, cpu));
|
|
BLANK();
|
|
DEFINE(THREAD_CPU_CONTEXT, offsetof(struct task_struct, thread.cpu_context));
|
|
BLANK();
|
|
DEFINE(S_X0, offsetof(struct pt_regs, regs[0]));
|
|
DEFINE(S_X1, offsetof(struct pt_regs, regs[1]));
|
|
DEFINE(S_X2, offsetof(struct pt_regs, regs[2]));
|
|
DEFINE(S_X3, offsetof(struct pt_regs, regs[3]));
|
|
DEFINE(S_X4, offsetof(struct pt_regs, regs[4]));
|
|
DEFINE(S_X5, offsetof(struct pt_regs, regs[5]));
|
|
DEFINE(S_X6, offsetof(struct pt_regs, regs[6]));
|
|
DEFINE(S_X7, offsetof(struct pt_regs, regs[7]));
|
|
DEFINE(S_LR, offsetof(struct pt_regs, regs[30]));
|
|
DEFINE(S_SP, offsetof(struct pt_regs, sp));
|
|
#ifdef CONFIG_COMPAT
|
|
DEFINE(S_COMPAT_SP, offsetof(struct pt_regs, compat_sp));
|
|
#endif
|
|
DEFINE(S_PSTATE, offsetof(struct pt_regs, pstate));
|
|
DEFINE(S_PC, offsetof(struct pt_regs, pc));
|
|
DEFINE(S_ORIG_X0, offsetof(struct pt_regs, orig_x0));
|
|
DEFINE(S_SYSCALLNO, offsetof(struct pt_regs, syscallno));
|
|
DEFINE(S_FRAME_SIZE, sizeof(struct pt_regs));
|
|
BLANK();
|
|
DEFINE(MM_CONTEXT_ID, offsetof(struct mm_struct, context.id.counter));
|
|
BLANK();
|
|
DEFINE(VMA_VM_MM, offsetof(struct vm_area_struct, vm_mm));
|
|
DEFINE(VMA_VM_FLAGS, offsetof(struct vm_area_struct, vm_flags));
|
|
BLANK();
|
|
DEFINE(VM_EXEC, VM_EXEC);
|
|
BLANK();
|
|
DEFINE(PAGE_SZ, PAGE_SIZE);
|
|
BLANK();
|
|
DEFINE(DMA_BIDIRECTIONAL, DMA_BIDIRECTIONAL);
|
|
DEFINE(DMA_TO_DEVICE, DMA_TO_DEVICE);
|
|
DEFINE(DMA_FROM_DEVICE, DMA_FROM_DEVICE);
|
|
BLANK();
|
|
DEFINE(CLOCK_REALTIME, CLOCK_REALTIME);
|
|
DEFINE(CLOCK_MONOTONIC, CLOCK_MONOTONIC);
|
|
DEFINE(CLOCK_REALTIME_RES, MONOTONIC_RES_NSEC);
|
|
DEFINE(CLOCK_REALTIME_COARSE, CLOCK_REALTIME_COARSE);
|
|
DEFINE(CLOCK_MONOTONIC_COARSE,CLOCK_MONOTONIC_COARSE);
|
|
DEFINE(CLOCK_COARSE_RES, LOW_RES_NSEC);
|
|
DEFINE(NSEC_PER_SEC, NSEC_PER_SEC);
|
|
BLANK();
|
|
DEFINE(VDSO_CS_CYCLE_LAST, offsetof(struct vdso_data, cs_cycle_last));
|
|
DEFINE(VDSO_XTIME_CLK_SEC, offsetof(struct vdso_data, xtime_clock_sec));
|
|
DEFINE(VDSO_XTIME_CLK_NSEC, offsetof(struct vdso_data, xtime_clock_nsec));
|
|
DEFINE(VDSO_XTIME_CRS_SEC, offsetof(struct vdso_data, xtime_coarse_sec));
|
|
DEFINE(VDSO_XTIME_CRS_NSEC, offsetof(struct vdso_data, xtime_coarse_nsec));
|
|
DEFINE(VDSO_WTM_CLK_SEC, offsetof(struct vdso_data, wtm_clock_sec));
|
|
DEFINE(VDSO_WTM_CLK_NSEC, offsetof(struct vdso_data, wtm_clock_nsec));
|
|
DEFINE(VDSO_TB_SEQ_COUNT, offsetof(struct vdso_data, tb_seq_count));
|
|
DEFINE(VDSO_CS_MULT, offsetof(struct vdso_data, cs_mult));
|
|
DEFINE(VDSO_CS_SHIFT, offsetof(struct vdso_data, cs_shift));
|
|
DEFINE(VDSO_TZ_MINWEST, offsetof(struct vdso_data, tz_minuteswest));
|
|
DEFINE(VDSO_TZ_DSTTIME, offsetof(struct vdso_data, tz_dsttime));
|
|
DEFINE(VDSO_USE_SYSCALL, offsetof(struct vdso_data, use_syscall));
|
|
BLANK();
|
|
DEFINE(TVAL_TV_SEC, offsetof(struct timeval, tv_sec));
|
|
DEFINE(TVAL_TV_USEC, offsetof(struct timeval, tv_usec));
|
|
DEFINE(TSPEC_TV_SEC, offsetof(struct timespec, tv_sec));
|
|
DEFINE(TSPEC_TV_NSEC, offsetof(struct timespec, tv_nsec));
|
|
BLANK();
|
|
DEFINE(TZ_MINWEST, offsetof(struct timezone, tz_minuteswest));
|
|
DEFINE(TZ_DSTTIME, offsetof(struct timezone, tz_dsttime));
|
|
BLANK();
|
|
DEFINE(CPU_BOOT_STACK, offsetof(struct secondary_data, stack));
|
|
BLANK();
|
|
#ifdef CONFIG_KVM_ARM_HOST
|
|
DEFINE(VCPU_CONTEXT, offsetof(struct kvm_vcpu, arch.ctxt));
|
|
DEFINE(CPU_GP_REGS, offsetof(struct kvm_cpu_context, gp_regs));
|
|
DEFINE(CPU_USER_PT_REGS, offsetof(struct kvm_regs, regs));
|
|
DEFINE(CPU_FP_REGS, offsetof(struct kvm_regs, fp_regs));
|
|
DEFINE(VCPU_FPEXC32_EL2, offsetof(struct kvm_vcpu, arch.ctxt.sys_regs[FPEXC32_EL2]));
|
|
DEFINE(VCPU_HOST_CONTEXT, offsetof(struct kvm_vcpu, arch.host_cpu_context));
|
|
#endif
|
|
#ifdef CONFIG_CPU_PM
|
|
DEFINE(CPU_SUSPEND_SZ, sizeof(struct cpu_suspend_ctx));
|
|
DEFINE(CPU_CTX_SP, offsetof(struct cpu_suspend_ctx, sp));
|
|
DEFINE(MPIDR_HASH_MASK, offsetof(struct mpidr_hash, mask));
|
|
DEFINE(MPIDR_HASH_SHIFTS, offsetof(struct mpidr_hash, shift_aff));
|
|
DEFINE(SLEEP_STACK_DATA_SYSTEM_REGS, offsetof(struct sleep_stack_data, system_regs));
|
|
DEFINE(SLEEP_STACK_DATA_CALLEE_REGS, offsetof(struct sleep_stack_data, callee_saved_regs));
|
|
#endif
|
|
DEFINE(ARM_SMCCC_RES_X0_OFFS, offsetof(struct arm_smccc_res, a0));
|
|
DEFINE(ARM_SMCCC_RES_X2_OFFS, offsetof(struct arm_smccc_res, a2));
|
|
BLANK();
|
|
DEFINE(HIBERN_PBE_ORIG, offsetof(struct pbe, orig_address));
|
|
DEFINE(HIBERN_PBE_ADDR, offsetof(struct pbe, address));
|
|
DEFINE(HIBERN_PBE_NEXT, offsetof(struct pbe, next));
|
|
return 0;
|
|
}
|