KVM: arm64: Configure c15, PMU, and debug register traps on cpu load/put for VHE

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We do not have to change the c15 trap setting on each switch to/from the
guest on VHE systems, because this setting only affects guest EL1/EL0
(and therefore not the VHE host).

The PMU and debug trap configuration can also be done on vcpu load/put
instead, because they don't affect how the VHE host kernel can access the
debug registers while executing KVM kernel code.

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

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This commit is contained in:

Christoffer Dall 2017-08-04 13:47:18 +02:00 • committed by Marc Zyngier

parent c16c1131fb

commit a2465629b6

3 changed files with 29 additions and 9 deletions

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3

arch/arm64/include/asm/kvm_hyp.h

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31

arch/arm64/kvm/hyp/switch.c

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4

arch/arm64/kvm/hyp/sysreg-sr.c

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