KVM: arm64: Use the pKVM hyp vCPU structure in handle___kvm_vcpu_run()

Browse source

As a stepping stone towards deprivileging the host's access to the
guest's vCPU structures, introduce some naive flush/sync routines to
copy most of the host vCPU into the hyp vCPU on vCPU run and back
again on return to EL1.

This allows us to run using the pKVM hyp structures when KVM is
initialised in protected mode.

Tested-by: Vincent Donnefort <vdonnefort@google.com>
Co-developed-by: Fuad Tabba <tabba@google.com>
Signed-off-by: Fuad Tabba <tabba@google.com>
Signed-off-by: Will Deacon <will@kernel.org>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20221110190259.26861-27-will@kernel.org

...

This commit is contained in:

Will Deacon 2022-11-10 19:02:59 +00:00 • committed by Marc Zyngier

parent 169cd0f823

commit be66e67f17

3 changed files with 109 additions and 2 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

4

arch/arm64/kvm/hyp/include/nvhe/pkvm.h

View file

79

arch/arm64/kvm/hyp/nvhe/hyp-main.c

View file

28

arch/arm64/kvm/hyp/nvhe/pkvm.c

View file