From: Magnus Damm <magnus.damm-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
To: iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org
Cc: laurent.pinchart+renesas-ryLnwIuWjnjg/C1BVhZhaw@public.gmane.org,
geert+renesas-gXvu3+zWzMSzQB+pC5nmwQ@public.gmane.org,
Magnus Damm <magnus.damm-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-renesas-soc-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
horms+renesas-/R6kz+dDXgpPR4JQBCEnsQ@public.gmane.org
Subject: [PATCH 08/10] iommu/ipmmu-vmsa: Make IMBUSCTR setup optional
Date: Fri, 18 Mar 2016 01:30:23 +0900 [thread overview]
Message-ID: <20160317163023.24104.41969.sendpatchset@little-apple> (raw)
In-Reply-To: <20160317162909.24104.31682.sendpatchset@little-apple>
From: Magnus Damm <damm+renesas-yzvPICuk2ACczHhG9Qg4qA@public.gmane.org>
Allow certain DT compat strings to opt-out of setting up
IMBUSCR. The default case is unchanged.
Signed-off-by: Magnus Damm <damm+renesas-yzvPICuk2ACczHhG9Qg4qA@public.gmane.org>
---
drivers/iommu/ipmmu-vmsa.c | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)
--- 0023/drivers/iommu/ipmmu-vmsa.c
+++ work/drivers/iommu/ipmmu-vmsa.c 2016-03-18 00:32:45.550513000 +0900
@@ -36,6 +36,7 @@
struct ipmmu_features {
bool use_ns_alias_offset;
bool has_cache_leaf_nodes;
+ bool setup_imbuscr;
};
struct ipmmu_vmsa_device {
@@ -415,10 +416,10 @@ static int ipmmu_domain_init_context(str
ipmmu_ctx_write(domain, IMMAIR0, domain->cfg.arm_lpae_s1_cfg.mair[0]);
/* IMBUSCR */
- ipmmu_ctx_write(domain, IMBUSCR,
- ipmmu_ctx_read(domain, IMBUSCR) &
- ~(IMBUSCR_DVM | IMBUSCR_BUSSEL_MASK));
-
+ if (domain->root->features->setup_imbuscr)
+ ipmmu_ctx_write(domain, IMBUSCR,
+ ipmmu_ctx_read(domain, IMBUSCR) &
+ ~(IMBUSCR_DVM | IMBUSCR_BUSSEL_MASK));
/*
* IMSTR
* Clear all interrupt flags.
@@ -992,6 +993,7 @@ static void ipmmu_device_reset(struct ip
static const struct ipmmu_features ipmmu_features_default = {
.use_ns_alias_offset = true,
.has_cache_leaf_nodes = false,
+ .setup_imbuscr = true,
};
static const struct of_device_id ipmmu_of_ids[] = {
next prev parent reply other threads:[~2016-03-17 16:30 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-17 16:29 [PATCH 00/10] iommu/ipmmu-vmsa: Initial r8a7795 support Magnus Damm
2016-03-17 16:29 ` [PATCH 01/10] iommu/ipmmu-vmsa: Make use of IOMMU_OF_DECLARE() Magnus Damm
2016-03-17 16:29 ` [PATCH 02/10] iommu/ipmmu-vmsa: Enable multi context support Magnus Damm
2016-03-17 16:29 ` [PATCH 03/10] iommu/ipmmu-vmsa: Teach xlate() to skip disabled iommus Magnus Damm
2016-03-18 9:46 ` Geert Uytterhoeven
2016-03-17 16:29 ` [PATCH 04/10] iommu/ipmmu-vmsa: IPMMU device is 64-bit bus master Magnus Damm
2016-03-17 16:29 ` [PATCH 05/10] iommu/ipmmu-vmsa: Introduce features, break out alias Magnus Damm
2016-03-17 16:30 ` [PATCH 06/10] iommu/ipmmu-vmsa: Add optional root device feature Magnus Damm
2016-03-17 16:30 ` [PATCH 07/10] iommu/ipmmu-vmsa: Write IMCTR twice Magnus Damm
2016-03-17 16:30 ` Magnus Damm [this message]
2016-03-17 16:30 ` [PATCH 09/10] iommu/ipmmu-vmsa: Allow two bit SL0 Magnus Damm
2016-03-17 16:30 ` [PATCH 10/10] iommu/ipmmu-vmsa: Hook up r8a7795 DT matching code Magnus Damm
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