linux/arch/riscv/kernel/suspend_entry.S, branch master

riscv: Remove support for XIP kernel

2026-04-05T00:42:44Z

XIP has a history of being broken for long periods of time. In 2023, it was broken for 18 months before getting fixed [1]. In 2024 it was 4 months [2]. And now it is broken again since commit a44fb5722199 ("riscv: Add runtime constant support"), 10 months ago. These are clear signs that XIP feature is not being used. I occasionally looked after XIP, but mostly because I was bored and had nothing better to do. Remove XIP support. Revert is possible if someone shows up complaining. Link: https://lore.kernel.org/linux-riscv/20231212-customary-hardcover-e19462bf8e75@wendy/ [1] Link: https://lore.kernel.org/linux-riscv/20240526110104.470429-1-namcao@linutronix.de/ [2] Signed-off-by: Nam Cao Cc: Frederik Haxel Cc: Vitaly Wool Reviewed-by: Jisheng Zhang Acked-by: Conor Dooley Link: https://patch.msgid.link/20260202115403.2119218-1-namcao@linutronix.de [pjw@kernel.org: updated to apply] Signed-off-by: Paul Walmsley

riscv: Use SYM_*() assembly macros instead of deprecated ones

2023-11-06T17:42:47Z

ENTRY()/END()/WEAK() macros are deprecated and we should make use of the new SYM_*() macros [1] for better annotation of symbols. Replace the deprecated ones with the new ones and fix wrong usage of END()/ENDPROC() to correctly describe the symbols. [1] https://docs.kernel.org/core-api/asm-annotations.html Signed-off-by: Clément Léger Reviewed-by: Andrew Jones Link: https://lore.kernel.org/r/20231024132655.730417-3-cleger@rivosinc.com Signed-off-by: Palmer Dabbelt

riscv: Move global pointer loading to a macro

2023-10-27T21:43:07Z

In Clang 17, -fsanitize=shadow-call-stack uses the newly declared platform register gp for storing shadow call stack pointers. As this is obviously incompatible with gp relaxation, in preparation for CONFIG_SHADOW_CALL_STACK support, move global pointer loading to a single macro, which we can cleanly disable when SCS is used instead. Link: https://reviews.llvm.org/rGaa1d2693c256 Link: https://github.com/riscv-non-isa/riscv-elf-psabi-doc/commit/a484e843e6eeb51f0cb7b8819e50da6d2444d769 Signed-off-by: Sami Tolvanen Tested-by: Nathan Chancellor Link: https://lore.kernel.org/r/20230927224757.1154247-11-samitolvanen@google.com Signed-off-by: Palmer Dabbelt

riscv: Add types to indirectly called assembly functions

2023-08-23T21:16:37Z

With CONFIG_CFI_CLANG, assembly functions indirectly called from C code must be annotated with type identifiers to pass CFI checking. Use the SYM_TYPED_START macro to add types to the relevant functions. Reviewed-by: Kees Cook Tested-by: Nathan Chancellor Signed-off-by: Sami Tolvanen Link: https://lore.kernel.org/r/20230710183544.999540-10-samitolvanen@google.com Signed-off-by: Palmer Dabbelt

RISC-V: Factor out common code of __cpu_resume_enter()

2023-04-29T18:25:11Z

The cpu_resume() function is very similar for the suspend to disk and suspend to ram cases. Factor out the common code into suspend_restore_csrs macro and suspend_restore_regs macro. Signed-off-by: Sia Jee Heng Reviewed-by: Andrew Jones Reviewed-by: Conor Dooley Link: https://lore.kernel.org/r/20230330064321.1008373-3-jeeheng.sia@starfivetech.com Signed-off-by: Palmer Dabbelt

RISC-V: Split out the XIP fixups into their own file

2022-05-25T21:43:33Z

This was broken by the original refactoring (as the XIP definitions depend on ) and then more broken by the merge (as I accidentally took the old version). This fixes both breakages, while also pulling this out of to avoid polluting most assembly files with the XIP fixups. Fixes: bee7fbc38579 ("RISC-V CPU Idle Support") Fixes: 63b13e64a829 ("RISC-V: Add arch functions for non-retentive suspend entry/exit") Link: https://lore.kernel.org/r/20220420184056.7886-4-palmer@rivosinc.com Reviewed-by: Guo Ren Signed-off-by: Palmer Dabbelt

RISC-V: Add arch functions for non-retentive suspend entry/exit

2022-03-10T17:29:31Z

The hart registers and CSRs are not preserved in non-retentative suspend state so we provide arch specific helper functions which will save/restore hart context upon entry/exit to non-retentive suspend state. These helper functions can be used by cpuidle drivers for non-retentive suspend entry/exit. Signed-off-by: Anup Patel Signed-off-by: Anup Patel Reviewed-by: Guo Ren Signed-off-by: Palmer Dabbelt