Gaurav Batra 9d2ccf00bd powerpc/iommu: Limit number of TCEs to 512 for H_STUFF_TCE hcall
Currently in tce_freemulti_pSeriesLP() there is no limit on how many
TCEs are passed to the H_STUFF_TCE hcall. This has not caused an issue
until now, but newer firmware releases have started enforcing a limit of
512 TCEs per call.

The limit is correct per the specification (PAPR v2.12 § 14.5.4.2.3).

The code has been in it's current form since it was initially merged.

Cc: stable@vger.kernel.org
Signed-off-by: Gaurav Batra <gbatra@linux.vnet.ibm.com>
Reviewed-by: Brian King <brking@linux.vnet.ibm.com>
[mpe: Tweak change log wording & add PAPR reference]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230525143454.56878-1-gbatra@linux.vnet.ibm.com
2023-05-30 16:33:10 +10:00
..
2022-10-13 22:30:07 +11:00
2019-07-13 16:08:36 -07:00
2023-04-28 16:24:32 -07:00
2022-05-08 22:15:40 +10:00
2023-04-28 16:24:32 -07:00