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| author | Ricardo Koller <ricarkol@google.com> | 2023-04-26 20:23:20 +0300 |
|---|---|---|
| committer | Oliver Upton <oliver.upton@linux.dev> | 2023-05-16 20:39:17 +0300 |
| commit | 02f10845f435fbda4aa2385d4c3a9730c4a5c75a (patch) | |
| tree | bab5a84ed285905d1a61071616b9c5e63a07b462 /arch/arm64/include/asm/kvm_pgtable.h | |
| parent | c14d08c5adb25f397638be3d8dd7f4738fb38272 (diff) | |
| download | linux-02f10845f435fbda4aa2385d4c3a9730c4a5c75a.tar.xz | |
KVM: arm64: Add KVM_PGTABLE_WALK flags for skipping CMOs and BBM TLBIs
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>
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 26a4293726c1..3f2d43ba2b62 100644 --- a/arch/arm64/include/asm/kvm_pgtable.h +++ b/arch/arm64/include/asm/kvm_pgtable.h @@ -195,6 +195,12 @@ typedef bool (*kvm_pgtable_force_pte_cb_t)(u64 addr, u64 end, * with other software walkers. * @KVM_PGTABLE_WALK_HANDLE_FAULT: Indicates the page-table walk was * invoked from a fault handler. + * @KVM_PGTABLE_WALK_SKIP_BBM_TLBI: Visit and update table entries + * without Break-before-make's + * TLB invalidation. + * @KVM_PGTABLE_WALK_SKIP_CMO: Visit and update table entries + * without Cache maintenance + * operations required. */ enum kvm_pgtable_walk_flags { KVM_PGTABLE_WALK_LEAF = BIT(0), @@ -202,6 +208,8 @@ enum kvm_pgtable_walk_flags { KVM_PGTABLE_WALK_TABLE_POST = BIT(2), KVM_PGTABLE_WALK_SHARED = BIT(3), KVM_PGTABLE_WALK_HANDLE_FAULT = BIT(4), + KVM_PGTABLE_WALK_SKIP_BBM_TLBI = BIT(5), + KVM_PGTABLE_WALK_SKIP_CMO = BIT(6), }; struct kvm_pgtable_visit_ctx { |