On Thu, 2019-01-31 at 01:53:47 UTC, Oliver O'Halloran wrote:
> When binding an SCM volume to a physical address the hypervisor has the
> option to return early with a continue token with the expectation that
> the guest will resume the bind operation until it completes. A quirk of
> this interface is that the bind address will only be returned by the
> first bind h-call and the subsequent calls will return
> 0xFFFF_FFFF_FFFF_FFFF for the bind address.
>
> We currently do not save the address returned by the first h-call. As a
> result we will use the junk address as the base of the bound region if
> the hypervisor decides to split the bind across multiple h-calls. This
> bug was found when testing with very large SCM volumes where the bind
> process would take more time than they hypervisor's internal h-call time
> limit would allow. This patch fixes the issue by saving the bind address
> from the first call.
>
> Cc: stable@xxxxxxxxxxxxxxx
> Fixes: b5beae5e224f ("powerpc/pseries: Add driver for PAPR SCM regions")
> Signed-off-by: Oliver O'Halloran <oohall@xxxxxxxxx>
Applied to powerpc fixes, thanks.
https://git.kernel.org/powerpc/c/5a3840a470c41ec0b85cd36ca8037033
cheers
