arm64: KVM: VHE: Implement VHE activate/deactivate_traps

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Running the kernel in HYP mode requires the HCR_E2H bit to be set
at all times, and the HCR_TGE bit to be set when running as a host
(and cleared when running as a guest). At the same time, the vector
 must be set to the current role of the kernel (either host or
hypervisor), and a couple of system registers differ between VHE
and non-VHE.

We implement these by using another set of alternate functions
that get dynamically patched.

Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>

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Marc Zyngier 2015-01-29 15:47:55 +00:00

parent 328762247c

commit 68908bf789

3 changed files with 52 additions and 7 deletions

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3

arch/arm64/include/asm/kvm_arm.h

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3

arch/arm64/include/asm/kvm_emulate.h

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55

arch/arm64/kvm/hyp/switch.c

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