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| author | Ard Biesheuvel <ard.biesheuvel@linaro.org> | 2019-12-06 23:13:40 +0100 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2020-01-16 18:32:56 +0100 |
| commit | 500d14affdf73677071c075bb9becc637b60fe39 (patch) | |
| tree | 26b9d981037c97047fd993e13dd3e0b2f8567d66 /arch | |
| parent | arm64: kvm: stop treating register x18 as caller save (diff) | |
| download | linux-500d14affdf73677071c075bb9becc637b60fe39.tar.xz linux-500d14affdf73677071c075bb9becc637b60fe39.zip | |
arm64: kernel: avoid x18 in __cpu_soft_restart
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>
Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm64/kernel/cpu-reset.S | 4 |
1 files 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 |