From: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
To: <linux-arm-kernel@lists.infradead.org>,
<linux-acpi@vger.kernel.org>, <iommu@lists.linux-foundation.org>
Cc: <linuxarm@huawei.com>, <lorenzo.pieralisi@arm.com>,
<joro@8bytes.org>, <robin.murphy@arm.com>, <will@kernel.org>,
<wanghuiqiang@huawei.com>, <guohanjun@huawei.com>,
<steven.price@arm.com>, <Sami.Mujawar@arm.com>,
<jon@solid-run.com>, <eric.auger@redhat.com>,
<yangyicong@huawei.com>
Subject: [PATCH v7 9/9] iommu/dma: Reserve any RMR regions associated with a dev
Date: Thu, 5 Aug 2021 09:07:24 +0100 [thread overview]
Message-ID: <20210805080724.480-10-shameerali.kolothum.thodi@huawei.com> (raw)
In-Reply-To: <20210805080724.480-1-shameerali.kolothum.thodi@huawei.com>
Get ACPI IORT RMR regions associated with a dev reserved
so that there is a unity mapping for them in SMMU.
Signed-off-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
---
drivers/iommu/dma-iommu.c | 56 +++++++++++++++++++++++++++++++++++----
1 file changed, 51 insertions(+), 5 deletions(-)
diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c
index 1b6e27475279..c1ae0c3d4b33 100644
--- a/drivers/iommu/dma-iommu.c
+++ b/drivers/iommu/dma-iommu.c
@@ -207,22 +207,68 @@ void iommu_dma_put_rmrs(struct fwnode_handle *iommu_fwnode,
}
EXPORT_SYMBOL(iommu_dma_put_rmrs);
+static bool iommu_dma_dev_has_rmr(struct iommu_fwspec *fwspec,
+ struct iommu_resv_region *e)
+{
+ int i;
+
+ for (i = 0; i < fwspec->num_ids; i++) {
+ if (e->fw_data.rmr.sid == fwspec->ids[i])
+ return true;
+ }
+
+ return false;
+}
+
+static void iommu_dma_get_rmr_resv_regions(struct device *dev,
+ struct list_head *list)
+{
+ struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
+ struct list_head rmr_list;
+ struct iommu_resv_region *rmr, *tmp;
+
+ INIT_LIST_HEAD(&rmr_list);
+ if (iommu_dma_get_rmrs(fwspec->iommu_fwnode, &rmr_list))
+ return;
+
+ if (dev_is_pci(dev)) {
+ struct pci_dev *pdev = to_pci_dev(dev);
+ struct pci_host_bridge *host = pci_find_host_bridge(pdev->bus);
+
+ if (!host->preserve_config)
+ return;
+ }
+
+ list_for_each_entry_safe(rmr, tmp, &rmr_list, list) {
+ if (!iommu_dma_dev_has_rmr(fwspec, rmr))
+ continue;
+
+ /* Remove from iommu RMR list and add to dev resv_regions */
+ list_del_init(&rmr->list);
+ list_add_tail(&rmr->list, list);
+ }
+
+ iommu_dma_put_rmrs(fwspec->iommu_fwnode, &rmr_list);
+}
+
/**
* iommu_dma_get_resv_regions - Reserved region driver helper
* @dev: Device from iommu_get_resv_regions()
* @list: Reserved region list from iommu_get_resv_regions()
*
* IOMMU drivers can use this to implement their .get_resv_regions callback
- * for general non-IOMMU-specific reservations. Currently, this covers GICv3
- * ITS region reservation on ACPI based ARM platforms that may require HW MSI
- * reservation.
+ * for general non-IOMMU-specific reservations. Currently this covers,
+ * -GICv3 ITS region reservation on ACPI based ARM platforms that may
+ * require HW MSI reservation.
+ * -Any ACPI IORT RMR memory range reservations (IORT spec rev E.b)
*/
void iommu_dma_get_resv_regions(struct device *dev, struct list_head *list)
{
- if (!is_of_node(dev_iommu_fwspec_get(dev)->iommu_fwnode))
+ if (!is_of_node(dev_iommu_fwspec_get(dev)->iommu_fwnode)) {
iort_iommu_msi_get_resv_regions(dev, list);
-
+ iommu_dma_get_rmr_resv_regions(dev, list);
+ }
}
EXPORT_SYMBOL(iommu_dma_get_resv_regions);
--
2.17.1
next prev parent reply other threads:[~2021-08-05 8:10 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-05 8:07 [PATCH v7 0/9] ACPI/IORT: Support for IORT RMR node Shameer Kolothum
2021-08-05 8:07 ` [PATCH v7 1/9] iommu: Introduce a union to struct iommu_resv_region Shameer Kolothum
2021-08-20 10:22 ` Steven Price
2021-10-08 12:14 ` Robin Murphy
2021-10-09 6:57 ` Jon Nettleton
2021-10-11 5:47 ` Shameerali Kolothum Thodi
2021-10-11 13:47 ` Robin Murphy
2021-08-05 8:07 ` [PATCH v7 2/9] ACPI/IORT: Add support for RMR node parsing Shameer Kolothum
2021-08-05 16:03 ` Lorenzo Pieralisi
2021-08-05 16:31 ` Jon Nettleton
2021-08-05 18:37 ` Laurentiu Tudor
2021-09-06 17:44 ` Robin Murphy
2021-09-06 19:51 ` Jon Nettleton
2021-09-16 7:26 ` Shameerali Kolothum Thodi
2021-09-16 7:52 ` Jon Nettleton
2021-09-16 8:26 ` Shameerali Kolothum Thodi
2021-09-16 11:16 ` Jon Nettleton
2021-09-17 11:26 ` Shameerali Kolothum Thodi
2021-10-05 10:53 ` Laurentiu Tudor
2021-10-08 12:48 ` Robin Murphy
2021-10-09 7:06 ` Jon Nettleton
2021-10-11 14:04 ` Robin Murphy
2021-10-12 8:00 ` Jon Nettleton
2021-12-08 12:18 ` Lorenzo Pieralisi
2021-12-08 13:26 ` Jon Nettleton
2021-12-08 14:37 ` Robin Murphy
2021-12-08 15:11 ` Jon Nettleton
2021-10-11 5:59 ` Shameerali Kolothum Thodi
2021-08-05 8:07 ` [PATCH v7 3/9] iommu/dma: Introduce generic helper to retrieve RMR info Shameer Kolothum
2021-10-08 13:03 ` Robin Murphy
2021-10-11 5:51 ` Shameerali Kolothum Thodi
2021-08-05 8:07 ` [PATCH v7 4/9] ACPI/IORT: Add a helper to retrieve RMR memory regions Shameer Kolothum
2021-08-05 15:43 ` Lorenzo Pieralisi
2021-08-05 8:07 ` [PATCH v7 5/9] iommu/arm-smmu-v3: Introduce strtab init helper Shameer Kolothum
2021-08-05 8:07 ` [PATCH v7 6/9] iommu/arm-smmu-v3: Refactor arm_smmu_init_bypass_stes() to force bypass Shameer Kolothum
2021-08-05 8:07 ` [PATCH v7 7/9] iommu/arm-smmu-v3: Get associated RMR info and install bypass STE Shameer Kolothum
2021-08-05 8:07 ` [PATCH v7 8/9] iommu/arm-smmu: Get associated RMR info and install bypass SMR Shameer Kolothum
2021-08-05 8:07 ` Shameer Kolothum [this message]
2021-10-08 13:09 ` [PATCH v7 9/9] iommu/dma: Reserve any RMR regions associated with a dev Robin Murphy
2021-10-09 7:07 ` Jon Nettleton
2021-10-11 15:00 ` Robin Murphy
2021-10-11 15:42 ` Shameerali Kolothum Thodi
2021-08-05 13:22 ` [PATCH v7 0/9] ACPI/IORT: Support for IORT RMR node Ard Biesheuvel
2021-08-05 13:35 ` Shameerali Kolothum Thodi
2021-08-05 14:09 ` Ard Biesheuvel
2021-08-31 5:06 ` Jon Nettleton
2021-09-30 9:47 ` Eric Auger
2021-09-30 10:50 ` Shameerali Kolothum Thodi
2022-01-25 13:00 ` Shameerali Kolothum Thodi
2022-01-25 19:30 ` Robin Murphy
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=20210805080724.480-10-shameerali.kolothum.thodi@huawei.com \
--to=shameerali.kolothum.thodi@huawei.com \
--cc=Sami.Mujawar@arm.com \
--cc=eric.auger@redhat.com \
--cc=guohanjun@huawei.com \
--cc=iommu@lists.linux-foundation.org \
--cc=jon@solid-run.com \
--cc=joro@8bytes.org \
--cc=linux-acpi@vger.kernel.org \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linuxarm@huawei.com \
--cc=lorenzo.pieralisi@arm.com \
--cc=robin.murphy@arm.com \
--cc=steven.price@arm.com \
--cc=wanghuiqiang@huawei.com \
--cc=will@kernel.org \
--cc=yangyicong@huawei.com \
/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).