From: sricharan@codeaurora.org (Sricharan R)
To: linux-arm-kernel@lists.infradead.org
Subject: [RESEND PATCH V6 2/6] iommu/io-pgtable-arm: add support for the IOMMU_PRIV flag
Date: Fri, 2 Dec 2016 20:25:05 +0530 [thread overview]
Message-ID: <1480690509-13490-3-git-send-email-sricharan@codeaurora.org> (raw)
In-Reply-To: <1480690509-13490-1-git-send-email-sricharan@codeaurora.org>
From: Jeremy Gebben <jgebben@codeaurora.org>
Allow the creation of privileged mode mappings, for stage 1 only.
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Tested-by: Robin Murphy <robin.murphy@arm.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Jeremy Gebben <jgebben@codeaurora.org>
---
[V6] No change
drivers/iommu/io-pgtable-arm.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/iommu/io-pgtable-arm.c b/drivers/iommu/io-pgtable-arm.c
index f5c90e1..69ba83a 100644
--- a/drivers/iommu/io-pgtable-arm.c
+++ b/drivers/iommu/io-pgtable-arm.c
@@ -350,11 +350,14 @@ static arm_lpae_iopte arm_lpae_prot_to_pte(struct arm_lpae_io_pgtable *data,
if (data->iop.fmt == ARM_64_LPAE_S1 ||
data->iop.fmt == ARM_32_LPAE_S1) {
- pte = ARM_LPAE_PTE_AP_UNPRIV | ARM_LPAE_PTE_nG;
+ pte = ARM_LPAE_PTE_nG;
if (!(prot & IOMMU_WRITE) && (prot & IOMMU_READ))
pte |= ARM_LPAE_PTE_AP_RDONLY;
+ if (!(prot & IOMMU_PRIV))
+ pte |= ARM_LPAE_PTE_AP_UNPRIV;
+
if (prot & IOMMU_MMIO)
pte |= (ARM_LPAE_MAIR_ATTR_IDX_DEV
<< ARM_LPAE_PTE_ATTRINDX_SHIFT);
--
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation
next prev parent reply other threads:[~2016-12-02 14:55 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-12-02 14:55 [RESEND PATCH V6 0/6] Add support for privileged mappings Sricharan R
2016-12-02 14:55 ` [RESEND PATCH V6 1/6] iommu: add IOMMU_PRIV attribute Sricharan R
2016-12-02 14:55 ` Sricharan R [this message]
2016-12-02 14:55 ` [RESEND PATCH V6 3/6] common: DMA-mapping: add DMA_ATTR_PRIVILEGED attribute Sricharan R
2016-12-02 14:55 ` [RESEND PATCH V6 4/6] arm64/dma-mapping: Implement DMA_ATTR_PRIVILEGED Sricharan R
2016-12-02 14:55 ` [RESEND PATCH V6 5/6] dmaengine: pl330: Make sure microcode is privileged Sricharan R
2016-12-06 5:01 ` Vinod Koul
2016-12-02 14:55 ` [PATCH V6 6/6] iommu/arm-smmu: Set privileged attribute to 'default' instead of 'unprivileged' Sricharan R
2016-12-06 17:31 ` Will Deacon
2016-12-02 16:16 ` [RESEND PATCH V6 0/6] Add support for privileged mappings Robin Murphy
2016-12-04 7:48 ` Sricharan
2016-12-06 19:14 ` Robin Murphy
2016-12-07 9:44 ` Sricharan
2016-12-12 19:34 ` Sricharan
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=1480690509-13490-3-git-send-email-sricharan@codeaurora.org \
--to=sricharan@codeaurora.org \
--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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).