Re: [PATCH v5 3/8] KVM: arm64: Simplify the sanitise_mte_tags() logic

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Thu, Nov 03 2022, Peter Collingbourne <pcc@xxxxxxxxxx> wrote:

> From: Catalin Marinas <catalin.marinas@xxxxxxx>
>
> Currently sanitise_mte_tags() checks if it's an online page before
> attempting to sanitise the tags. Such detection should be done in the
> caller via the VM_MTE_ALLOWED vma flag. Since kvm_set_spte_gfn() does
> not have the vma, leave the page unmapped if not already tagged. Tag
> initialisation will be done on a subsequent access fault in
> user_mem_abort().
>
> Signed-off-by: Catalin Marinas <catalin.marinas@xxxxxxx>
> [pcc@xxxxxxxxxx: fix the page initializer]
> Signed-off-by: Peter Collingbourne <pcc@xxxxxxxxxx>
> Reviewed-by: Steven Price <steven.price@xxxxxxx>
> Cc: Will Deacon <will@xxxxxxxxxx>
> Cc: Marc Zyngier <maz@xxxxxxxxxx>
> Cc: Peter Collingbourne <pcc@xxxxxxxxxx>
> ---
>  arch/arm64/kvm/mmu.c | 40 +++++++++++++++-------------------------
>  1 file changed, 15 insertions(+), 25 deletions(-)

Reviewed-by: Cornelia Huck <cohuck@xxxxxxxxxx>




[Index of Archives]     [KVM ARM]     [KVM ia64]     [KVM ppc]     [Virtualization Tools]     [Spice Development]     [Libvirt]     [Libvirt Users]     [Linux USB Devel]     [Linux Audio Users]     [Yosemite Questions]     [Linux Kernel]     [Linux SCSI]     [XFree86]

  Powered by Linux