KVM: arm64: Don't clobber x4 in __do_hyp_init

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arm_smccc_1_1_hvc() only adds write contraints for x0-3 in the inline
assembly for the HVC instruction so make sure those are the only
registers that change when __do_hyp_init is called.

Tested-by: David Brazdil <dbrazdil@google.com>
Signed-off-by: Andrew Scull <ascull@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20210125145415.122439-3-ascull@google.com

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Andrew Scull 2021-01-25 14:54:15 +00:00 • committed by Marc Zyngier

parent 139bc8a614

commit e500b805c3

1 changed files with 11 additions and 9 deletions

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arch/arm64/kvm/hyp/nvhe/hyp-init.S

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