From: Joerg Roedel <joro-zLv9SwRftAIdnm+yROfE0A@public.gmane.org>
To: Yoshihiro Shimoda
<yoshihiro.shimoda.uh-zM6kxYcvzFBBDgjK7y7TUQ@public.gmane.org>
Cc: linux-renesas-soc-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org,
magnus.damm-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org
Subject: Re: [PATCH] iommu/ipmmu-vmsa: IMUCTRn.TTSEL needs a special usage on R-Car Gen3
Date: Fri, 20 Jul 2018 14:04:22 +0200 [thread overview]
Message-ID: <20180720120422.f6whui2dtr5ygscu@8bytes.org> (raw)
In-Reply-To: <1531104811-23417-1-git-send-email-yoshihiro.shimoda.uh-zM6kxYcvzFBBDgjK7y7TUQ@public.gmane.org>
On Mon, Jul 09, 2018 at 11:53:31AM +0900, Yoshihiro Shimoda wrote:
> 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-zM6kxYcvzFBBDgjK7y7TUQ@public.gmane.org>
> ---
> drivers/iommu/ipmmu-vmsa.c | 8 ++++++++
> 1 file changed, 8 insertions(+)
Applied, thanks.
prev parent reply other threads:[~2018-07-20 12:04 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-07-09 2:53 [PATCH] iommu/ipmmu-vmsa: IMUCTRn.TTSEL needs a special usage on R-Car Gen3 Yoshihiro Shimoda
[not found] ` <1531104811-23417-1-git-send-email-yoshihiro.shimoda.uh-zM6kxYcvzFBBDgjK7y7TUQ@public.gmane.org>
2018-07-20 12:04 ` Joerg Roedel [this message]
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