6.6-stable review patch. If anyone has any objections, please let me know.
------------------
From: Will Deacon <will@xxxxxxxxxx>
commit 36e008323926036650299cfbb2dca704c7aba849 upstream.
The TLBI level hints are for leaf entries only, so take care not to pass
them incorrectly after clearing a table entry.
Cc: Gavin Shan <gshan@xxxxxxxxxx>
Cc: Marc Zyngier <maz@xxxxxxxxxx>
Cc: Quentin Perret <qperret@xxxxxxxxxx>
Fixes: 82bb02445de5 ("KVM: arm64: Implement kvm_pgtable_hyp_unmap() at EL2")
Fixes: 6d9d2115c480 ("KVM: arm64: Add support for stage-2 map()/unmap() in generic page-table")
Signed-off-by: Will Deacon <will@xxxxxxxxxx>
Reviewed-by: Shaoqin Huang <shahuang@xxxxxxxxxx>
Reviewed-by: Marc Zyngier <maz@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20240327124853.11206-3-will@xxxxxxxxxx
Signed-off-by: Oliver Upton <oliver.upton@xxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx> # 6.6.y only
[will@: Use '0' instead of TLBI_TTL_UNKNOWN to indicate "no level"]
Signed-off-by: Will Deacon <will@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/arm64/kvm/hyp/pgtable.c | 12 +++++++-----
1 file changed, 7 insertions(+), 5 deletions(-)
--- a/arch/arm64/kvm/hyp/pgtable.c
+++ b/arch/arm64/kvm/hyp/pgtable.c
@@ -523,7 +523,7 @@ static int hyp_unmap_walker(const struct
kvm_clear_pte(ctx->ptep);
dsb(ishst);
- __tlbi_level(vae2is, __TLBI_VADDR(ctx->addr, 0), ctx->level);
+ __tlbi_level(vae2is, __TLBI_VADDR(ctx->addr, 0), 0);
} else {
if (ctx->end - ctx->addr < granule)
return -EINVAL;
@@ -861,10 +861,12 @@ static void stage2_unmap_put_pte(const s
if (kvm_pte_valid(ctx->old)) {
kvm_clear_pte(ctx->ptep);
- if (!stage2_unmap_defer_tlb_flush(pgt) ||
- kvm_pte_table(ctx->old, ctx->level)) {
- kvm_call_hyp(__kvm_tlb_flush_vmid_ipa, mmu,
- ctx->addr, ctx->level);
+ if (kvm_pte_table(ctx->old, ctx->level)) {
+ kvm_call_hyp(__kvm_tlb_flush_vmid_ipa, mmu, ctx->addr,
+ 0);
+ } else if (!stage2_unmap_defer_tlb_flush(pgt)) {
+ kvm_call_hyp(__kvm_tlb_flush_vmid_ipa, mmu, ctx->addr,
+ ctx->level);
}
}
