From: will.deacon@arm.com (Will Deacon)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v2 3/5] iommu/arm-smmu: provide option to dsb macro when publishing tables
Date: Mon, 10 Feb 2014 14:22:37 +0000 [thread overview]
Message-ID: <1392042159-11603-3-git-send-email-will.deacon@arm.com> (raw)
In-Reply-To: <1392042159-11603-1-git-send-email-will.deacon@arm.com>
On coherent systems, publishing new page tables to the SMMU walker is
achieved with a dsb instruction. In fact, this can be a dsb(ishst) which
also provides the mandatory barrier option for arm64.
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
---
drivers/iommu/arm-smmu.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c
index 8911850c9444..8f6fee54f3b1 100644
--- a/drivers/iommu/arm-smmu.c
+++ b/drivers/iommu/arm-smmu.c
@@ -1417,7 +1417,7 @@ out_unlock:
/* Ensure new page tables are visible to the hardware walker */
if (smmu->features & ARM_SMMU_FEAT_COHERENT_WALK)
- dsb();
+ dsb(ishst);
return ret;
}
--
1.8.2.2
next prev parent reply other threads:[~2014-02-10 14:22 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-02-10 14:22 [PATCH v2 1/5] arm64: barriers: make use of barrier options with explicit barriers Will Deacon
2014-02-10 14:22 ` [PATCH v2 2/5] irqchip: gic: use writel instead of dsb + writel_relaxed Will Deacon
2014-02-10 16:17 ` Catalin Marinas
2014-02-11 8:52 ` Marc Zyngier
2014-02-10 14:22 ` Will Deacon [this message]
2014-02-10 14:22 ` [PATCH v2 4/5] arm64: barriers: wire up new barrier options Will Deacon
2014-02-10 14:22 ` [PATCH v2 5/5] arm64: barriers: use barrier() instead of smp_mb() when !SMP Will Deacon
2014-02-10 16:18 ` [PATCH v2 1/5] arm64: barriers: make use of barrier options with explicit barriers Catalin Marinas
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1392042159-11603-3-git-send-email-will.deacon@arm.com \
--to=will.deacon@arm.com \
--cc=linux-arm-kernel@lists.infradead.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.