On Tue, Jun 06, 2023 at 02:33:38PM +0000, Vasant Hegde wrote:
> [ Upstream commit 11c439a19466e7feaccdbce148a75372fddaf4e9 ]
>
> IOMMU v2 page table supports 4 level (47 bit) or 5 level (56 bit) virtual
> address space. Current code assumes it can support 64bit IOVA address
> space. If IOVA allocator allocates virtual address > 47/56 bit (depending
> on page table level) then it will do wrong mapping and cause invalid
> translation.
>
> Hence adjust aperture size to use max address supported by the page table.
>
> Reported-by: Jerry Snitselaar <jsnitsel@xxxxxxxxxx>
> Fixes: aaac38f61487 ("iommu/amd: Initial support for AMD IOMMU v2 page table")
> Cc: <Stable@xxxxxxxxxxxxxxx> # v6.0+
> Cc: Suravee Suthikulpanit <suravee.suthikulpanit@xxxxxxx>
> Signed-off-by: Vasant Hegde <vasant.hegde@xxxxxxx>
> Reviewed-by: Jerry Snitselaar <jsnitsel@xxxxxxxxxx>
> Link: https://lore.kernel.org/r/20230518054351.9626-1-vasant.hegde@xxxxxxx
> Signed-off-by: Joerg Roedel <jroedel@xxxxxxx>
> [ Modified to work with "V2 with 4 level page table" only - Vasant ]
> Signed-off-by: Vasant Hegde <vasant.hegde@xxxxxxx>
> ---
> drivers/iommu/amd/iommu.c | 11 ++++++++++-
> 1 file changed, 10 insertions(+), 1 deletion(-)
>
Both now queued up, thanks.
greg k-h
