KVM: arm64: nv: Support multiple nested Stage-2 mmu structures

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Add Stage-2 mmu data structures for virtual EL2 and for nested guests.
We don't yet populate shadow Stage-2 page tables, but we now have a
framework for getting to a shadow Stage-2 pgd.

We allocate twice the number of vcpus as Stage-2 mmu structures because
that's sufficient for each vcpu running two translation regimes without
having to flush the Stage-2 page tables.

Co-developed-by: Christoffer Dall <christoffer.dall@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20240614144552.2773592-2-maz@kernel.org
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>

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Marc Zyngier 2024-06-14 15:45:37 +01:00 • committed by Oliver Upton

parent 83a7eefedc

commit 4f128f8e1a

7 changed files with 349 additions and 21 deletions

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36

arch/arm64/include/asm/kvm_host.h

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24

arch/arm64/include/asm/kvm_mmu.h

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6

arch/arm64/include/asm/kvm_nested.h

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11

arch/arm64/kvm/arm.c

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69

arch/arm64/kvm/mmu.c

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218

arch/arm64/kvm/nested.c

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6

arch/arm64/kvm/reset.c

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