iommu/ipmmu-vmsa: IMUCTRn.TTSEL needs a special usage on R-Car Gen3

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The TTSEL bit of IMUCTRn register of R-Car Gen3 needs to be set
unused MMU context number even if uTLBs are disabled
(The MMUEN bit of IMUCTRn register = 0).
Since initial values of IMUCTRn.TTSEL on all IPMMU-domains are 0,
this patch adds a new feature "reserved_context" to reserve IPMMU
context number 0 as the unused MMU context.

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>

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Yoshihiro Shimoda 2018-07-09 11:53:31 +09:00 • committed by Joerg Roedel

parent bc24f62bf8

commit 2ae8695570

1 changed files with 8 additions and 0 deletions

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drivers/iommu/ipmmu-vmsa.c

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