From mboxrd@z Thu Jan 1 00:00:00 1970 From: Eric Auger Subject: [RFC v3 04/10] iommu: iommu_alloc_resv_region Date: Tue, 15 Nov 2016 13:09:17 +0000 Message-ID: <1479215363-2898-5-git-send-email-eric.auger@redhat.com> References: <1479215363-2898-1-git-send-email-eric.auger@redhat.com> Cc: kvm@vger.kernel.org, drjones@redhat.com, linux-kernel@vger.kernel.org, pranav.sawargaonkar@gmail.com, iommu@lists.linux-foundation.org, punit.agrawal@arm.com, diana.craciun@nxp.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 Return-path: In-Reply-To: <1479215363-2898-1-git-send-email-eric.auger@redhat.com> Sender: linux-kernel-owner@vger.kernel.org List-Id: kvm.vger.kernel.org Introduce a new helper serving the purpose to allocate a reserved region. This will be used in iommu driver implementing reserved region callbacks. Signed-off-by: Eric Auger --- drivers/iommu/iommu.c | 16 ++++++++++++++++ include/linux/iommu.h | 8 ++++++++ 2 files changed, 24 insertions(+) diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index c7ed334..6ee529f 100644 --- a/drivers/iommu/iommu.c +++ b/drivers/iommu/iommu.c @@ -1562,6 +1562,22 @@ void iommu_put_resv_regions(struct device *dev, struct list_head *list) ops->put_resv_regions(dev, list); } +struct iommu_resv_region *iommu_alloc_resv_region(phys_addr_t start, + size_t length, + unsigned int prot) +{ + struct iommu_resv_region *region; + + region = kzalloc(sizeof(*region), GFP_KERNEL); + if (!region) + return NULL; + + region->start = start; + region->length = length; + region->prot = prot; + return region; +} + /* Request that a device is direct mapped by the IOMMU */ int iommu_request_dm_for_dev(struct device *dev) { diff --git a/include/linux/iommu.h b/include/linux/iommu.h index 02cf565..0aea877 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -241,6 +241,8 @@ extern void iommu_set_fault_handler(struct iommu_domain *domain, extern void iommu_get_resv_regions(struct device *dev, struct list_head *list); extern void iommu_put_resv_regions(struct device *dev, struct list_head *list); extern int iommu_request_dm_for_dev(struct device *dev); +extern struct iommu_resv_region * +iommu_alloc_resv_region(phys_addr_t start, size_t length, unsigned int prot); extern int iommu_attach_group(struct iommu_domain *domain, struct iommu_group *group); @@ -454,6 +456,12 @@ static inline void iommu_put_resv_regions(struct device *dev, { } +static inline struct iommu_resv_region * +iommu_alloc_resv_region(phys_addr_t start, size_t length, unsigned int prot) +{ + return NULL; +} + static inline int iommu_request_dm_for_dev(struct device *dev) { return -ENODEV; -- 1.9.1