Sia Jee Heng c031721001 RISC-V: Add arch functions to support hibernation/suspend-to-disk ... Low level Arch functions were created to support hibernation. swsusp_arch_suspend() relies code from __cpu_suspend_enter() to write cpu state onto the stack, then calling swsusp_save() to save the memory image. Arch specific hibernation header is implemented and is utilized by the arch_hibernation_header_restore() and arch_hibernation_header_save() functions. The arch specific hibernation header consists of satp, hartid, and the cpu_resume address. The kernel built version is also need to be saved into the hibernation image header to making sure only the same kernel is restore when resume. swsusp_arch_resume() creates a temporary page table that covering only the linear map. It copies the restore code to a 'safe' page, then start to restore the memory image. Once completed, it restores the original kernel's page table. It then calls into __hibernate_cpu_resume() to restore the CPU context. Finally, it follows the normal hibernation path back to the hibernation core. To enable hibernation/suspend to disk into RISCV, the below config need to be enabled: - CONFIG_HIBERNATION - CONFIG_ARCH_HIBERNATION_HEADER - CONFIG_ARCH_HIBERNATION_POSSIBLE Signed-off-by: Sia Jee Heng <jeeheng.sia@starfivetech.com> Reviewed-by: Ley Foon Tan <leyfoon.tan@starfivetech.com> Reviewed-by: Mason Huo <mason.huo@starfivetech.com> Reviewed-by: Conor Dooley <conor.dooley@microchip.com> Reviewed-by: Andrew Jones <ajones@ventanamicro.com> Link: https://lore.kernel.org/r/20230330064321.1008373-5-jeeheng.sia@starfivetech.com Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>		2023-04-29 11:25:13 -07:00
..
boot	SoC: DT changes for 6.3	2023-02-20 15:49:56 -08:00
configs	riscv: defconfig: Enable the Allwinner D1 platform and drivers	2023-01-27 23:10:08 +01:00
errata	RISC-V: take text_mutex during alternative patching	2023-02-21 17:21:33 -08:00
include	RISC-V: Add arch functions to support hibernation/suspend-to-disk	2023-04-29 11:25:13 -07:00
kernel	RISC-V: Add arch functions to support hibernation/suspend-to-disk	2023-04-29 11:25:13 -07:00
kvm	ARM:	2023-02-25 11:30:21 -08:00
lib	riscv, lib: Fix Zbb strncmp	2023-02-28 18:42:38 -08:00
mm	RISC-V: mm: Enable huge page support to kernel_page_present() function	2023-04-29 11:25:12 -07:00
net	riscv, bpf: Add bpf trampoline support for RV64	2023-02-17 21:45:30 +01:00
purgatory	RISC-V: add infrastructure to allow different str* implementations	2023-01-31 11:43:23 -08:00
Kbuild	riscv: move errata/ and kvm/ builds to arch/riscv/Kbuild	2022-06-01 22:26:32 -07:00
Kconfig	RISC-V: Add arch functions to support hibernation/suspend-to-disk	2023-04-29 11:25:13 -07:00
Kconfig.debug
Kconfig.erratas	drivers/perf: riscv_pmu_sbi: add support for PMU variant on T-Head C9xx cores	2022-10-27 14:35:20 -07:00
Kconfig.socs	RISC-V Patches for the 6.3 Merge Window, Part 1	2023-02-25 11:14:08 -08:00
Makefile	RISC-V Patches for the 6.3 Merge Window, Part 1	2023-02-25 11:14:08 -08:00