KVM: arm64: Add KVM_PGTABLE_WALK flags for skipping CMOs and BBM TLBIs

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Add two flags to kvm_pgtable_visit_ctx, KVM_PGTABLE_WALK_SKIP_BBM_TLBI
and KVM_PGTABLE_WALK_SKIP_CMO, to indicate that the walk should not
perform TLB invalidations (TLBIs) in break-before-make (BBM) nor cache
maintenance operations (CMO). This will be used by a future commit to
create unlinked tables not accessible to the HW page-table walker.

Signed-off-by: Ricardo Koller <ricarkol@google.com>
Reviewed-by: Shaoqin Huang <shahuang@redhat.com>
Reviewed-by: Gavin Shan <gshan@redhat.com>
Link: https://lore.kernel.org/r/20230426172330.1439644-3-ricarkol@google.com
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>

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This commit is contained in:

Ricardo Koller 2023-04-26 17:23:20 +00:00 • committed by Oliver Upton

parent c14d08c5ad

commit 02f10845f4

2 changed files with 34 additions and 11 deletions

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8

arch/arm64/include/asm/kvm_pgtable.h

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37

arch/arm64/kvm/hyp/pgtable.c

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