[PATCH v4 02/28] arm64: KVM: Move lr save/restore to do_el2_call
From: Marc Zyngier <hidden>
Date: 2017-03-21 19:20:32
Also in:
kvm, kvmarm
Subsystem:
arm64 port (aarch64 architecture), kernel virtual machine for arm64 (kvm/arm64), the rest · Maintainers:
Catalin Marinas, Will Deacon, Marc Zyngier, Oliver Upton, Linus Torvalds
At the moment, we only save/restore lr if on VHE, as we rely only the EL1 code to have preserved it in the non-VHE case. As we're about to get rid of the latter, let's move the save/restore code to the do_el2_call macro, unifying both code paths. Signed-off-by: Marc Zyngier <redacted> --- arch/arm64/kvm/hyp/hyp-entry.S | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/arm64/kvm/hyp/hyp-entry.S b/arch/arm64/kvm/hyp/hyp-entry.S
index 5e9052f087f2..d8ef788646c6 100644
--- a/arch/arm64/kvm/hyp/hyp-entry.S
+++ b/arch/arm64/kvm/hyp/hyp-entry.S@@ -32,17 +32,17 @@ * Shuffle the parameters before calling the function * pointed to in x0. Assumes parameters in x[1,2,3]. */ + str lr, [sp, #-16]! mov lr, x0 mov x0, x1 mov x1, x2 mov x2, x3 blr lr + ldr lr, [sp], #16 .endm ENTRY(__vhe_hyp_call) - str lr, [sp, #-16]! do_el2_call - ldr lr, [sp], #16 /* * We used to rely on having an exception return to get * an implicit isb. In the E2H case, we don't have it anymore.
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2.11.0