| Date | Fri, 6 Dec 2019 14:13:40 -0800 | Subject | [PATCH v6 04/15] arm64: kernel: avoid x18 in __cpu_soft_restart | From | Sami Tolvanen <> |
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From: Ard Biesheuvel <ard.biesheuvel@linaro.org>
The code in __cpu_soft_restart() uses x18 as an arbitrary temp register, which will shortly be disallowed. So use x8 instead.
Link: https://patchwork.kernel.org/patch/9836877/ Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> [Sami: updated commit message] Signed-off-by: Sami Tolvanen <samitolvanen@google.com> Reviewed-by: Mark Rutland <mark.rutland@arm.com> Reviewed-by: Kees Cook <keescook@chromium.org> --- arch/arm64/kernel/cpu-reset.S | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/arm64/kernel/cpu-reset.S b/arch/arm64/kernel/cpu-reset.S index 6ea337d464c4..32c7bf858dd9 100644 --- a/arch/arm64/kernel/cpu-reset.S +++ b/arch/arm64/kernel/cpu-reset.S @@ -42,11 +42,11 @@ ENTRY(__cpu_soft_restart) mov x0, #HVC_SOFT_RESTART hvc #0 // no return -1: mov x18, x1 // entry +1: mov x8, x1 // entry mov x0, x2 // arg0 mov x1, x3 // arg1 mov x2, x4 // arg2 - br x18 + br x8 ENDPROC(__cpu_soft_restart) .popsection -- 2.24.0.393.g34dc348eaf-goog
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