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authorGuo Ren <guoren@linux.alibaba.com>2023-07-15 20:15:05 -0400
committerPalmer Dabbelt <palmer@rivosinc.com>2023-08-16 07:26:28 -0700
commit8d0be64154cf24660a947b84340e8d5bb1af855a (patch)
treeb920a47a025204aacc0a72d408b0ef8edb95bd43 /arch
parent79bc3f85c51fc352f8e684ba6b626f677a3aa230 (diff)
riscv: stack: Fixup independent irq stack for CONFIG_FRAME_POINTER=n
The independent irq stack uses s0 to save & restore sp, but s0 would be corrupted when CONFIG_FRAME_POINTER=n. So add s0 in the clobber list to fix the problem. Fixes: 163e76cc6ef4 ("riscv: stack: Support HAVE_IRQ_EXIT_ON_IRQ_STACK") Cc: stable@vger.kernel.org Reported-by: Zhangjin Wu <falcon@tinylab.org> Signed-off-by: Guo Ren <guoren@linux.alibaba.com> Signed-off-by: Guo Ren <guoren@kernel.org> Tested-by: Drew Fustini <dfustini@baylibre.com> Link: https://lore.kernel.org/r/20230716001506.3506041-2-guoren@kernel.org Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Diffstat (limited to 'arch')
-rw-r--r--arch/riscv/kernel/traps.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/riscv/kernel/traps.c b/arch/riscv/kernel/traps.c
index 729f79c97e2b..f798c853bede 100644
--- a/arch/riscv/kernel/traps.c
+++ b/arch/riscv/kernel/traps.c
@@ -372,6 +372,9 @@ asmlinkage void noinstr do_irq(struct pt_regs *regs)
: [sp] "r" (sp), [regs] "r" (regs)
: "a0", "a1", "a2", "a3", "a4", "a5", "a6", "a7",
"t0", "t1", "t2", "t3", "t4", "t5", "t6",
+#ifndef CONFIG_FRAME_POINTER
+ "s0",
+#endif
"memory");
} else
#endif