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The serialization structs for device, domain and iommu are allocated. Signed-off-by: Samiullah Khawaja --- drivers/iommu/liveupdate.c | 71 +++++++++++++++++++++++++++++++++++++- 1 file changed, 70 insertions(+), 1 deletion(-) diff --git a/drivers/iommu/liveupdate.c b/drivers/iommu/liveupdate.c index 93e5691a8c1f..21ce7be9b87e 100644 --- a/drivers/iommu/liveupdate.c +++ b/drivers/iommu/liveupdate.c @@ -10,15 +10,84 @@ #include #include #include +#include #include +static void iommu_liveupdate_free_objs(u64 next, bool incoming) +{ + struct iommu_objs_ser *objs; + + while (next) { + objs = __va(next); + next = objs->next_objs; + + if (!incoming) + kho_unpreserve_free(objs); + else + folio_put(virt_to_folio(objs)); + } +} + static void iommu_liveupdate_flb_free(struct iommu_lu_flb_obj *obj) { + if (obj->iommu_domains) + iommu_liveupdate_free_objs(obj->ser->iommu_domains_phys, false); + + if (obj->devices) + iommu_liveupdate_free_objs(obj->ser->devices_phys, false); + + if (obj->iommus) + iommu_liveupdate_free_objs(obj->ser->iommus_phys, false); + + kho_unpreserve_free(obj->ser); } static int iommu_liveupdate_flb_preserve(struct liveupdate_flb_op_args *argp) { - return -EOPNOTSUPP; + struct iommu_lu_flb_obj *obj; + struct iommu_lu_flb_ser *ser; + void *mem; + + obj = kzalloc(sizeof(*obj), GFP_KERNEL); + if (!obj) + return -ENOMEM; + + mutex_init(&obj->lock); + mem = kho_alloc_preserve(sizeof(*ser)); + if (IS_ERR(mem)) + goto err_free; + + ser = mem; + obj->ser = ser; + + mem = kho_alloc_preserve(PAGE_SIZE); + if (IS_ERR(mem)) + goto err_free; + + obj->iommu_domains = mem; + ser->iommu_domains_phys = virt_to_phys(obj->iommu_domains); + + mem = kho_alloc_preserve(PAGE_SIZE); + if (IS_ERR(mem)) + goto err_free; + + obj->devices = mem; + ser->devices_phys = virt_to_phys(obj->devices); + + mem = kho_alloc_preserve(PAGE_SIZE); + if (IS_ERR(mem)) + goto err_free; + + obj->iommus = mem; + ser->iommus_phys = virt_to_phys(obj->iommus); + + argp->obj = obj; + argp->data = virt_to_phys(ser); + return 0; + +err_free: + iommu_liveupdate_flb_free(obj); + return PTR_ERR(mem); } static void iommu_liveupdate_flb_unpreserve(struct liveupdate_flb_op_args *argp) -- 2.52.0.158.g65b55ccf14-goog