Re: [PATCH v5 5/6] iommu/amd: Modify clear_dte_entry() to avoid in-place update

[Jason Gunthorpe]

On Mon, Oct 07, 2024 at 04:13:52AM +0000, Suravee Suthikulpanit wrote:
> Lock DTE and copy value to a temporary storage before update using
> cmpxchg128.
> 
> Also, refactor the function to simplify logic for applying erratum 63.
> 
> Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@xxxxxxx>
> ---
>  drivers/iommu/amd/iommu.c | 18 ++++++------------
>  1 file changed, 6 insertions(+), 12 deletions(-)

Reviewed-by: Jason Gunthorpe <jgg@xxxxxxxxxx>

Jason