KVM: arm64: Introduce pkvm_alloc_private_va_range()

Browse source

pkvm_hyp_alloc_private_va_range() can be used to reserve private VA ranges
in the pKVM nVHE hypervisor. Allocations are aligned based on the order of
the requested size.

This will be used to implement stack guard pages for pKVM nVHE hypervisor
(in a subsequent patch in the series).

Credits to Quentin Perret <qperret@google.com> for the idea of moving
private VA allocation out of __pkvm_create_private_mapping()

Signed-off-by: Kalesh Singh <kaleshsingh@google.com>
Tested-by: Fuad Tabba <tabba@google.com>
Reviewed-by: Fuad Tabba <tabba@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20220420214317.3303360-3-kaleshsingh@google.com

...

This commit is contained in:

Kalesh Singh 2022-04-20 14:42:53 -07:00 • committed by Marc Zyngier

parent 92abe0f81e

commit f922c13e77

3 changed files with 72 additions and 30 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

6

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

View file

18

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

View file

84

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

View file