diff options
| author |  Fuad Tabba <tabba@google.com>
| 2022-11-10 19:02:45 +0000 |
|---|---|---|
| committer |  Marc Zyngier <maz@kernel.org>
| 2022-11-11 17:16:05 +0000 |
| commit | a1ec5c70d3f63d8a143fb83cd7f53bd8ff2f72c8 (patch) | |
| tree | a5402ab73434c6fc7703af7b4900f11c7b0dca04 /arch/arm64/include/asm/kvm_pgtable.h | |
| parent | KVM: arm64: Rename 'host_kvm' to 'host_mmu' (diff) | |
| download | linux-a1ec5c70d3f63d8a143fb83cd7f53bd8ff2f72c8.tar.gz linux-a1ec5c70d3f63d8a143fb83cd7f53bd8ff2f72c8.tar.bz2 linux-a1ec5c70d3f63d8a143fb83cd7f53bd8ff2f72c8.zip | |
KVM: arm64: Add infrastructure to create and track pKVM instances at EL2
Introduce a global table (and lock) to track pKVM instances at EL2, and
provide hypercalls that can be used by the untrusted host to create and
destroy pKVM VMs and their vCPUs. pKVM VM/vCPU state is directly
accessible only by the trusted hypervisor (EL2).
Each pKVM VM is directly associated with an untrusted host KVM instance,
and is referenced by the host using an opaque handle. Future patches
will provide hypercalls to allow the host to initialize/set/get pKVM
VM/vCPU state using the opaque handle.
Tested-by: Vincent Donnefort <vdonnefort@google.com>
Signed-off-by: Fuad Tabba <tabba@google.com>
Co-developed-by: Will Deacon <will@kernel.org>
Signed-off-by: Will Deacon <will@kernel.org>
[maz: silence warning on unmap_donated_memory_noclear()]
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20221110190259.26861-13-will@kernel.org
Diffstat (limited to 'arch/arm64/include/asm/kvm_pgtable.h')
| -rw-r--r-- | arch/arm64/include/asm/kvm_pgtable.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/kvm_pgtable.h b/arch/arm64/include/asm/kvm_pgtable.h index 3252eb50ecfe..15c389db1931 100644 --- a/arch/arm64/include/asm/kvm_pgtable.h +++ b/arch/arm64/include/asm/kvm_pgtable.h @@ -297,6 +297,14 @@ u64 kvm_pgtable_hyp_unmap(struct kvm_pgtable *pgt, u64 addr, u64 size); u64 kvm_get_vtcr(u64 mmfr0, u64 mmfr1, u32 phys_shift); /** + * kvm_pgtable_stage2_pgd_size() - Helper to compute size of a stage-2 PGD + * @vtcr: Content of the VTCR register. + * + * Return: the size (in bytes) of the stage-2 PGD + */ +size_t kvm_pgtable_stage2_pgd_size(u64 vtcr); + +/** * __kvm_pgtable_stage2_init() - Initialise a guest stage-2 page-table. * @pgt: Uninitialised page-table structure to initialise. * @mmu: S2 MMU context for this S2 translation |