From: Eric Auger <eric.auger@redhat.com>
To: eric.auger@redhat.com, eric.auger.pro@gmail.com,
christoffer.dall@linaro.org, marc.zyngier@arm.com,
robin.murphy@arm.com, alex.williamson@redhat.com,
will.deacon@arm.com, joro@8bytes.org, tglx@linutronix.de,
jason@lakedaemon.net, linux-arm-kernel@lists.infradead.org
Cc: kvm@vger.kernel.org, drjones@redhat.com,
linux-kernel@vger.kernel.org, Bharat.Bhushan@freescale.com,
pranav.sawargaonkar@gmail.com, p.fedin@samsung.com,
iommu@lists.linux-foundation.org, Jean-Philippe.Brucker@arm.com,
yehuday@marvell.com, Manish.Jaggi@caviumnetworks.com
Subject: [RFC 07/11] iommu: Use IOMMU_DOMAIN_MIXED typed domain when IOMMU translates MSI
Date: Tue, 27 Sep 2016 20:48:34 +0000 [thread overview]
Message-ID: <1475009318-2617-8-git-send-email-eric.auger@redhat.com> (raw)
In-Reply-To: <1475009318-2617-1-git-send-email-eric.auger@redhat.com>
If the IOMMU advertises IOMMU_CAP_TRANSLATE_MSI choose
IOMMU_DOMAIN_MIXED domain type instead of IOMMU_DOMAIN_UNMANAGED
to allow transparent allocation of MSI frame IOVAs.
Signed-off-by: Eric Auger <eric.auger@redhat.com>
---
drivers/iommu/iommu.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
index 617cb2b..8b4b90c 100644
--- a/drivers/iommu/iommu.c
+++ b/drivers/iommu/iommu.c
@@ -1069,7 +1069,10 @@ static struct iommu_domain *__iommu_domain_alloc(struct bus_type *bus,
struct iommu_domain *iommu_domain_alloc(struct bus_type *bus)
{
- return __iommu_domain_alloc(bus, IOMMU_DOMAIN_UNMANAGED);
+ if (bus->iommu_ops->capable(IOMMU_CAP_TRANSLATE_MSI))
+ return __iommu_domain_alloc(bus, IOMMU_DOMAIN_MIXED);
+ else
+ return __iommu_domain_alloc(bus, IOMMU_DOMAIN_UNMANAGED);
}
EXPORT_SYMBOL_GPL(iommu_domain_alloc);
--
1.9.1
next prev parent reply other threads:[~2016-09-27 20:51 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-09-27 20:48 [RFC 00/11] KVM PCIe/MSI passthrough on ARM/ARM64: re-design with transparent MSI mapping Eric Auger
2016-09-27 20:48 ` [RFC 01/11] iommu: Add iommu_domain_msi_geometry and DOMAIN_ATTR_MSI_GEOMETRY Eric Auger
2016-09-27 20:48 ` [RFC 02/11] iommu: Introduce IOMMU_CAP_TRANSLATE_MSI capability Eric Auger
2016-09-27 20:48 ` [RFC 03/11] iommu: Introduce IOMMU_DOMAIN_MIXED Eric Auger
2016-09-27 20:48 ` [RFC 04/11] iommu/dma: Allow MSI-only cookies Eric Auger
2016-09-27 20:48 ` [RFC 05/11] iommu/dma: iommu_dma_(un)map_mixed Eric Auger
2016-09-30 13:24 ` Robin Murphy
2016-10-02 9:56 ` Christoffer Dall
2016-10-04 17:18 ` Robin Murphy
2016-10-04 17:37 ` Auger Eric
2016-10-03 9:38 ` Auger Eric
2016-09-27 20:48 ` [RFC 06/11] iommu/arm-smmu: Allow IOMMU_DOMAIN_MIXED domain allocation Eric Auger
2016-09-27 20:48 ` Eric Auger [this message]
2016-09-27 20:48 ` [RFC 08/11] vfio/type1: Sets the IOVA window in case MSI IOVA need to be allocated Eric Auger
2016-09-27 20:48 ` [RFC 09/11] vfio/type1: Reserve IOVAs for IOMMU_DOMAIN_MIXED domains Eric Auger
2016-09-27 20:48 ` [RFC 10/11] iommu/arm-smmu: Do not advertise IOMMU_CAP_INTR_REMAP Eric Auger
2016-09-27 20:48 ` [RFC 11/11] iommu/arm-smmu: Advertise IOMMU_CAP_TRANSLATE_MSI Eric Auger
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