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| author |   Marc Zyngier <marc.zyngier@arm.com> | 2017-04-03 19:38:05 +0100 |
|---|---|---|
| committer |   Christoffer Dall <cdall@linaro.org> | 2017-04-09 07:49:35 -0700 |
| commit | af42f20480bf13d9dbf099ccca65f3de8c44fcaf (patch) | |
| tree | fda8f02af6f84242bbbedaa5a99185fdc05055e5 /arch/arm64/kernel | |
| parent | arm64: hyp-stub/KVM: Kill __hyp_get_vectors (diff) | |
| download | linux-dev-af42f20480bf13d9dbf099ccca65f3de8c44fcaf.tar.xz linux-dev-af42f20480bf13d9dbf099ccca65f3de8c44fcaf.zip | |
arm64: hyp-stub: Zero x0 on successful stub handling
We now return HVC_STUB_ERR when a stub hypercall fails, but we
leave whatever was in x0 on success. Zeroing it on return seems
like a good idea.
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <cdall@linaro.org>
Diffstat (limited to 'arch/arm64/kernel')
| -rw-r--r-- | arch/arm64/kernel/hyp-stub.S | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/arch/arm64/kernel/hyp-stub.S b/arch/arm64/kernel/hyp-stub.S index d55604d91e33..e1261fbaa374 100644 --- a/arch/arm64/kernel/hyp-stub.S +++ b/arch/arm64/kernel/hyp-stub.S @@ -73,8 +73,10 @@ el1_sync: /* Someone called kvm_call_hyp() against the hyp-stub... */ ldr x0, =HVC_STUB_ERR + eret -9: eret +9: mov x0, xzr + eret ENDPROC(el1_sync) .macro invalid_vector label |