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| author | Marc Zyngier <maz@kernel.org> | 2021-06-24 15:12:43 +0100 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2021-06-25 14:25:56 +0100 |
| commit | 188982cda00ebfe28b50c2905d9bbaa2e9a001b9 (patch) | |
| tree | 467bfe82bb1af4eb463c36bf7b74590566bbff2d /arch/arm64 | |
| parent | 9f03db6673598f618f10ba01b3f8824bd5f31a41 (diff) | |
| parent | 98db7259fa7b963d80da49fd636744e28a78981e (diff) | |
Merge branch kvm-arm64/mmu/mte into kvmarm-master/next
Last minute fix for MTE, making sure the pages are
flagged as MTE before they are released.
* kvm-arm64/mmu/mte:
KVM: arm64: Set the MTE tag bit before releasing the page
Signed-off-by: Marc Zyngier <maz@kernel.org>
Diffstat (limited to 'arch/arm64')
| -rw-r--r-- | arch/arm64/kvm/guest.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/arch/arm64/kvm/guest.c b/arch/arm64/kvm/guest.c index 4ddb20017b2f..60815ae477cf 100644 --- a/arch/arm64/kvm/guest.c +++ b/arch/arm64/kvm/guest.c @@ -1053,6 +1053,14 @@ long kvm_vm_ioctl_mte_copy_tags(struct kvm *kvm, } else { num_tags = mte_copy_tags_from_user(maddr, tags, MTE_GRANULES_PER_PAGE); + + /* + * Set the flag after checking the write + * completed fully + */ + if (num_tags == MTE_GRANULES_PER_PAGE) + set_bit(PG_mte_tagged, &page->flags); + kvm_release_pfn_dirty(pfn); } @@ -1061,10 +1069,6 @@ long kvm_vm_ioctl_mte_copy_tags(struct kvm *kvm, goto out; } - /* Set the flag after checking the write completed fully */ - if (write) - set_bit(PG_mte_tagged, &page->flags); - gfn++; tags += num_tags; length -= PAGE_SIZE; |