arm64: kvm: Move lr save/restore from do_el2_call into EL1

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Today the 'hvc' calling KVM or the hyp-stub is expected to preserve all
registers. KVM saves/restores the registers it needs on the EL2 stack using
do_el2_call(). The hyp-stub has no stack, later patches need to be able to
be able to clobber the link register.

Move the link register save/restore to the the call sites.

Signed-off-by: James Morse <james.morse@arm.com>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>

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James Morse 2016-04-27 17:47:02 +01:00 • committed by Will Deacon

parent e7227d0e52

commit 00a44cdaba

3 changed files with 16 additions and 7 deletions

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10

arch/arm64/kernel/hyp-stub.S

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7

arch/arm64/kvm/hyp.S

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6

arch/arm64/kvm/hyp/hyp-entry.S

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