From: Magnus Damm <magnus.damm@gmail.com>
To: iommu@lists.linux-foundation.org
Cc: laurent.pinchart+renesas@ideasonboard.com,
geert+renesas@glider.be, joro@8bytes.org,
linux-kernel@vger.kernel.org, linux-renesas-soc@vger.kernel.org,
horms+renesas@verge.net.au, Magnus Damm <magnus.damm@gmail.com>
Subject: [PATCH v2 09/11] iommu/ipmmu-vmsa: Make IMBUSCTR setup optional
Date: Mon, 06 Jun 2016 12:58:49 +0900 [thread overview]
Message-ID: <20160606035849.31763.15348.sendpatchset@little-apple> (raw)
In-Reply-To: <20160606035723.31763.66500.sendpatchset@little-apple>
From: Magnus Damm <damm+renesas@opensource.se>
Introduce a feature to allow opt-out of setting up
IMBUSCR. The default case is unchanged.
Signed-off-by: Magnus Damm <damm+renesas@opensource.se>
---
Changes since V1:
- Updated the commit message
- Reworked patch to coexist with the multi context feature
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 2016-06-06 11:04:39.800607110 +0900
@@ -37,6 +37,7 @@ struct ipmmu_features {
bool use_ns_alias_offset;
bool has_cache_leaf_nodes;
bool has_eight_ctx;
+ bool setup_imbuscr;
};
struct ipmmu_vmsa_device {
@@ -438,10 +439,10 @@ 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.
@@ -1057,6 +1058,7 @@ static const struct ipmmu_features ipmmu
.use_ns_alias_offset = true,
.has_cache_leaf_nodes = false,
.has_eight_ctx = false,
+ .setup_imbuscr = true,
};
static const struct of_device_id ipmmu_of_ids[] = {
next prev parent reply other threads:[~2016-06-06 4:09 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-06 3:57 [PATCH v2 00/11] iommu/ipmmu-vmsa: r8a7795 support V2 Magnus Damm
2016-06-06 3:57 ` [PATCH v2 01/11] iommu/ipmmu-vmsa: Introduce features, break out alias Magnus Damm
2016-06-06 3:57 ` [PATCH v2 02/11] iommu/ipmmu-vmsa: Add optional root device feature Magnus Damm
2016-06-06 3:57 ` [PATCH v2 03/11] iommu/ipmmu-vmsa: Enable multi context support Magnus Damm
2016-06-06 3:58 ` [PATCH v2 04/11] iommu/ipmmu-vmsa: Reuse iommu groups Magnus Damm
2016-06-06 3:58 ` [PATCH v2 05/11] iommu/ipmmu-vmsa: Make use of IOMMU_OF_DECLARE() Magnus Damm
2017-02-07 12:59 ` Geert Uytterhoeven
2016-06-06 3:58 ` [PATCH v2 06/11] iommu/ipmmu-vmsa: Teach xlate() to skip disabled iommus Magnus Damm
2016-06-08 0:23 ` Laurent Pinchart
2016-06-06 3:58 ` [PATCH v2 07/11] iommu/ipmmu-vmsa: IPMMU device is 64-bit bus master Magnus Damm
2016-06-06 3:58 ` [PATCH v2 08/11] iommu/ipmmu-vmsa: Write IMCTR twice Magnus Damm
2016-06-06 3:58 ` Magnus Damm [this message]
2016-06-06 3:58 ` [PATCH v2 10/11] iommu/ipmmu-vmsa: Allow two bit SL0 Magnus Damm
2016-06-06 3:59 ` [PATCH v2 11/11] iommu/ipmmu-vmsa: Hook up r8a7795 DT matching code Magnus Damm
2016-06-06 7:05 ` [PATCH v2 00/11] iommu/ipmmu-vmsa: r8a7795 support V2 Geert Uytterhoeven
2016-06-21 12:42 ` Joerg Roedel
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