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| author | Jean-Philippe Brucker <jean-philippe@linaro.org> | 2021-07-21 10:18:35 +0300 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2021-07-21 13:23:25 +0300 |
| commit | a7c3acca53801e10a77ede6b759a73f5ac4bc261 (patch) | |
| tree | aa6739e676233664393b106c706c111b86ff3751 /include | |
| parent | e6f85cbeb23bd74b8966cf1f15bf7d01399ff625 (diff) | |
| download | linux-a7c3acca53801e10a77ede6b759a73f5ac4bc261.tar.xz | |
arm64: smccc: Save lr before calling __arm_smccc_sve_check()
Commit cfa7ff959a78 ("arm64: smccc: Support SMCCC v1.3 SVE register
saving hint") added a call to __arm_smccc_sve_check() which clobbers the
lr (register x30), causing __arm_smccc_hvc() to return to itself and
crash. Save lr on the stack before calling __arm_smccc_sve_check(). Save
the frame pointer (x29) to complete the frame record, and adjust the
offsets used to access stack parameters.
Acked-by: Ard Biesheuvel <ardb@kernel.org>
Acked-by: Mark Brown <broonie@kernel.org>
Fixes: cfa7ff959a78 ("arm64: smccc: Support SMCCC v1.3 SVE register saving hint")
Signed-off-by: Jean-Philippe Brucker <jean-philippe@linaro.org>
Link: https://lore.kernel.org/r/20210721071834.69130-1-jean-philippe@linaro.org
Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'include')
0 files changed, 0 insertions, 0 deletions