Updates for powerpc hcall
Description: Updates for powerpc hcall
Bugzilla: https://bugzilla.redhat.com/2222935
Build Info: https://brewweb.engineering.redhat.com/brew/taskinfo?taskID=54097183
Tested: Verified Brew build test kernel RPMs and confirmed issue is resovled
Signed-off-by: Mamatha Inamdar minamdar@redhat.com
commit 9d2ccf00bddc268045e3d65a8108d61ada0e4b4e Author: Gaurav Batra gbatra@linux.vnet.ibm.com Date: Thu May 25 09:34:54 2023 -0500
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
Signed-off-by: Mamatha Inamdar minamdar@redhat.com