From mboxrd@z Thu Jan 1 00:00:00 1970 From: robin.murphy@arm.com (Robin Murphy) Date: Mon, 11 Dec 2017 14:54:12 +0000 Subject: [PATCH v10 2/3] iommu/dma: Add HW MSI(GICv3 ITS) address regions reservation In-Reply-To: <20171129141449.120316-3-shameerali.kolothum.thodi@huawei.com> References: <20171129141449.120316-1-shameerali.kolothum.thodi@huawei.com> <20171129141449.120316-3-shameerali.kolothum.thodi@huawei.com> Message-ID: <431dd431-1c22-32aa-b3a0-2fd5d4a7ec11@arm.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On 29/11/17 14:14, Shameer Kolothum wrote: > Modified iommu_dma_get_resv_regions() to include GICv3 ITS > region on ACPI based ARM platfiorms which may require HW MSI > reservations. Assuming this builds correctly for all the various combinations of CONFIG_ACPI and CONFIG_ACPI_IORT, Reviewed-by: Robin Murphy > Signed-off-by: Shameer Kolothum > --- > drivers/iommu/dma-iommu.c | 8 +++++++- > 1 file changed, 7 insertions(+), 1 deletion(-) > > diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c > index 25914d3..f05f3cf 100644 > --- a/drivers/iommu/dma-iommu.c > +++ b/drivers/iommu/dma-iommu.c > @@ -19,6 +19,7 @@ > * along with this program. If not, see . > */ > > +#include > #include > #include > #include > @@ -167,13 +168,18 @@ void iommu_put_dma_cookie(struct iommu_domain *domain) > * > * IOMMU drivers can use this to implement their .get_resv_regions callback > * for general non-IOMMU-specific reservations. Currently, this covers host > - * bridge windows for PCI devices. > + * bridge windows for PCI devices and GICv3 ITS region reservation on ACPI > + * based ARM platforms that may require HW MSI reservation. > */ > void iommu_dma_get_resv_regions(struct device *dev, struct list_head *list) > { > struct pci_host_bridge *bridge; > struct resource_entry *window; > > + if (!is_of_node(dev->iommu_fwspec->iommu_fwnode) && > + iort_iommu_msi_get_resv_regions(dev, list) < 0) > + return; > + > if (!dev_is_pci(dev)) > return; > >