arm64: KVM: VHE: Clear HCR_TGE when invalidating guest TLBs

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commit 6892517629 upstream.

When invalidating guest TLBs, special care must be taken to
actually shoot the guest TLBs and not the host ones if we're
running on a VHE system.  This is controlled by the HCR_EL2.TGE
bit, which we forget to clear before invalidating TLBs.

Address the issue by introducing two wrappers (__tlb_switch_to_guest
and __tlb_switch_to_host) that take care of both the VTTBR_EL2
and HCR_EL2.TGE switching.

Reported-by: Tomasz Nowicki <tnowicki@caviumnetworks.com>
Tested-by: Tomasz Nowicki <tnowicki@caviumnetworks.com>
Reviewed-by: Christoffer Dall <cdall@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Marc Zyngier 2017-02-17 14:32:18 +00:00 • committed by Greg Kroah-Hartman

parent 8ca7ef0d9a

commit 61e79860b4

1 changed files with 55 additions and 9 deletions

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arch/arm64/kvm/hyp/tlb.c

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