Messages in this thread Patch in this message | | | From | Song Shuai <> | Subject | [PATCH V1 1/3] Revert "RISC-V: mark hibernation as nonportable" | Date | Sun, 25 Jun 2023 22:09:29 +0800 |
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This reverts commit ed309ce522185583b163bd0c74f0d9f299fe1826.
With the commit 3335068f8721 ("riscv: Use PUD/P4D/PGD pages for the linear mapping") reverted, the MIN_MEMBLOCK_ADDR points the kernel load address which was placed at a PMD boundary. And firmware always correctly mark resident memory, or memory protected with PMP as per the devicetree specification and/or the UEFI specification.
So those regions will not be mapped in the linear mapping and they can be safely saved/restored by hibernation.
Signed-off-by: Song Shuai <songshuaishuai@tinylab.org> --- arch/riscv/Kconfig | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-)
diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig index 5966ad97c30c..17b5fc7f54d4 100644 --- a/arch/riscv/Kconfig +++ b/arch/riscv/Kconfig @@ -800,11 +800,8 @@ menu "Power management options" source "kernel/power/Kconfig" -# Hibernation is only possible on systems where the SBI implementation has -# marked its reserved memory as not accessible from, or does not run -# from the same memory as, Linux config ARCH_HIBERNATION_POSSIBLE - def_bool NONPORTABLE + def_bool y config ARCH_HIBERNATION_HEADER def_bool HIBERNATION -- 2.20.1
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