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The common DM feature is supposed to be built with IOREQ_SERVER option enabled (as well as the IOREQ feature), which is selected for x86's config HVM for now. Also update XSM code a bit to let DM op be used on Arm. This support is going to be used on Arm to be able run device emulator outside of Xen hypervisor. Signed-off-by: Julien Grall Signed-off-by: Oleksandr Tyshchenko --- Please note, this is a split/cleanup/hardening of Julien's PoC: "Add support for Guest IO forwarding to a device emulator" Changes RFC -> V1: - update XSM, related changes were pulled from: [RFC PATCH V1 04/12] xen/arm: Introduce arch specific bits for IOREQ/DM features Changes V1 -> V2: - update the author of a patch - update patch description - introduce xen/dm.h and move definitions here Changes V2 -> V3: - no changes --- --- xen/arch/x86/hvm/dm.c | 291 ++++-------------------------------------------- xen/common/Makefile | 1 + xen/common/dm.c | 291 ++++++++++++++++++++++++++++++++++++++++++++++++ xen/include/xen/dm.h | 44 ++++++++ xen/include/xsm/dummy.h | 4 +- xen/include/xsm/xsm.h | 6 +- xen/xsm/dummy.c | 2 +- xen/xsm/flask/hooks.c | 5 +- 8 files changed, 364 insertions(+), 280 deletions(-) create mode 100644 xen/common/dm.c create mode 100644 xen/include/xen/dm.h diff --git a/xen/arch/x86/hvm/dm.c b/xen/arch/x86/hvm/dm.c index 71f5ca4..35f860a 100644 --- a/xen/arch/x86/hvm/dm.c +++ b/xen/arch/x86/hvm/dm.c @@ -16,6 +16,7 @@ #include #include +#include #include #include #include @@ -29,13 +30,6 @@ #include -struct dmop_args { - domid_t domid; - unsigned int nr_bufs; - /* Reserve enough buf elements for all current hypercalls. */ - struct xen_dm_op_buf buf[2]; -}; - static bool _raw_copy_from_guest_buf_offset(void *dst, const struct dmop_args *args, unsigned int buf_idx, @@ -338,148 +332,20 @@ static int inject_event(struct domain *d, return 0; } -static int dm_op(const struct dmop_args *op_args) +int arch_dm_op(struct xen_dm_op *op, struct domain *d, + const struct dmop_args *op_args, bool *const_op) { - struct domain *d; - struct xen_dm_op op; - bool const_op = true; long rc; - size_t offset; - - static const uint8_t op_size[] = { - [XEN_DMOP_create_ioreq_server] = sizeof(struct xen_dm_op_create_ioreq_server), - [XEN_DMOP_get_ioreq_server_info] = sizeof(struct xen_dm_op_get_ioreq_server_info), - [XEN_DMOP_map_io_range_to_ioreq_server] = sizeof(struct xen_dm_op_ioreq_server_range), - [XEN_DMOP_unmap_io_range_from_ioreq_server] = sizeof(struct xen_dm_op_ioreq_server_range), - [XEN_DMOP_set_ioreq_server_state] = sizeof(struct xen_dm_op_set_ioreq_server_state), - [XEN_DMOP_destroy_ioreq_server] = sizeof(struct xen_dm_op_destroy_ioreq_server), - [XEN_DMOP_track_dirty_vram] = sizeof(struct xen_dm_op_track_dirty_vram), - [XEN_DMOP_set_pci_intx_level] = sizeof(struct xen_dm_op_set_pci_intx_level), - [XEN_DMOP_set_isa_irq_level] = sizeof(struct xen_dm_op_set_isa_irq_level), - [XEN_DMOP_set_pci_link_route] = sizeof(struct xen_dm_op_set_pci_link_route), - [XEN_DMOP_modified_memory] = sizeof(struct xen_dm_op_modified_memory), - [XEN_DMOP_set_mem_type] = sizeof(struct xen_dm_op_set_mem_type), - [XEN_DMOP_inject_event] = sizeof(struct xen_dm_op_inject_event), - [XEN_DMOP_inject_msi] = sizeof(struct xen_dm_op_inject_msi), - [XEN_DMOP_map_mem_type_to_ioreq_server] = sizeof(struct xen_dm_op_map_mem_type_to_ioreq_server), - [XEN_DMOP_remote_shutdown] = sizeof(struct xen_dm_op_remote_shutdown), - [XEN_DMOP_relocate_memory] = sizeof(struct xen_dm_op_relocate_memory), - [XEN_DMOP_pin_memory_cacheattr] = sizeof(struct xen_dm_op_pin_memory_cacheattr), - }; - - rc = rcu_lock_remote_domain_by_id(op_args->domid, &d); - if ( rc ) - return rc; - - if ( !is_hvm_domain(d) ) - goto out; - - rc = xsm_dm_op(XSM_DM_PRIV, d); - if ( rc ) - goto out; - - offset = offsetof(struct xen_dm_op, u); - - rc = -EFAULT; - if ( op_args->buf[0].size < offset ) - goto out; - - if ( copy_from_guest_offset((void *)&op, op_args->buf[0].h, 0, offset) ) - goto out; - - if ( op.op >= ARRAY_SIZE(op_size) ) - { - rc = -EOPNOTSUPP; - goto out; - } - - op.op = array_index_nospec(op.op, ARRAY_SIZE(op_size)); - - if ( op_args->buf[0].size < offset + op_size[op.op] ) - goto out; - - if ( copy_from_guest_offset((void *)&op.u, op_args->buf[0].h, offset, - op_size[op.op]) ) - goto out; - - rc = -EINVAL; - if ( op.pad ) - goto out; - - switch ( op.op ) - { - case XEN_DMOP_create_ioreq_server: - { - struct xen_dm_op_create_ioreq_server *data = - &op.u.create_ioreq_server; - - const_op = false; - - rc = -EINVAL; - if ( data->pad[0] || data->pad[1] || data->pad[2] ) - break; - - rc = hvm_create_ioreq_server(d, data->handle_bufioreq, - &data->id); - break; - } - case XEN_DMOP_get_ioreq_server_info: + switch ( op->op ) { - struct xen_dm_op_get_ioreq_server_info *data = - &op.u.get_ioreq_server_info; - const uint16_t valid_flags = XEN_DMOP_no_gfns; - - const_op = false; - - rc = -EINVAL; - if ( data->flags & ~valid_flags ) - break; - - rc = hvm_get_ioreq_server_info(d, data->id, - (data->flags & XEN_DMOP_no_gfns) ? - NULL : &data->ioreq_gfn, - (data->flags & XEN_DMOP_no_gfns) ? - NULL : &data->bufioreq_gfn, - &data->bufioreq_port); - break; - } - - case XEN_DMOP_map_io_range_to_ioreq_server: - { - const struct xen_dm_op_ioreq_server_range *data = - &op.u.map_io_range_to_ioreq_server; - - rc = -EINVAL; - if ( data->pad ) - break; - - rc = hvm_map_io_range_to_ioreq_server(d, data->id, data->type, - data->start, data->end); - break; - } - - case XEN_DMOP_unmap_io_range_from_ioreq_server: - { - const struct xen_dm_op_ioreq_server_range *data = - &op.u.unmap_io_range_from_ioreq_server; - - rc = -EINVAL; - if ( data->pad ) - break; - - rc = hvm_unmap_io_range_from_ioreq_server(d, data->id, data->type, - data->start, data->end); - break; - } - case XEN_DMOP_map_mem_type_to_ioreq_server: { struct xen_dm_op_map_mem_type_to_ioreq_server *data = - &op.u.map_mem_type_to_ioreq_server; + &op->u.map_mem_type_to_ioreq_server; unsigned long first_gfn = data->opaque; - const_op = false; + *const_op = false; rc = -EOPNOTSUPP; if ( !hap_enabled(d) ) @@ -523,36 +389,10 @@ static int dm_op(const struct dmop_args *op_args) break; } - case XEN_DMOP_set_ioreq_server_state: - { - const struct xen_dm_op_set_ioreq_server_state *data = - &op.u.set_ioreq_server_state; - - rc = -EINVAL; - if ( data->pad ) - break; - - rc = hvm_set_ioreq_server_state(d, data->id, !!data->enabled); - break; - } - - case XEN_DMOP_destroy_ioreq_server: - { - const struct xen_dm_op_destroy_ioreq_server *data = - &op.u.destroy_ioreq_server; - - rc = -EINVAL; - if ( data->pad ) - break; - - rc = hvm_destroy_ioreq_server(d, data->id); - break; - } - case XEN_DMOP_track_dirty_vram: { const struct xen_dm_op_track_dirty_vram *data = - &op.u.track_dirty_vram; + &op->u.track_dirty_vram; rc = -EINVAL; if ( data->pad ) @@ -568,7 +408,7 @@ static int dm_op(const struct dmop_args *op_args) case XEN_DMOP_set_pci_intx_level: { const struct xen_dm_op_set_pci_intx_level *data = - &op.u.set_pci_intx_level; + &op->u.set_pci_intx_level; rc = set_pci_intx_level(d, data->domain, data->bus, data->device, data->intx, @@ -579,7 +419,7 @@ static int dm_op(const struct dmop_args *op_args) case XEN_DMOP_set_isa_irq_level: { const struct xen_dm_op_set_isa_irq_level *data = - &op.u.set_isa_irq_level; + &op->u.set_isa_irq_level; rc = set_isa_irq_level(d, data->isa_irq, data->level); break; @@ -588,7 +428,7 @@ static int dm_op(const struct dmop_args *op_args) case XEN_DMOP_set_pci_link_route: { const struct xen_dm_op_set_pci_link_route *data = - &op.u.set_pci_link_route; + &op->u.set_pci_link_route; rc = hvm_set_pci_link_route(d, data->link, data->isa_irq); break; @@ -597,19 +437,19 @@ static int dm_op(const struct dmop_args *op_args) case XEN_DMOP_modified_memory: { struct xen_dm_op_modified_memory *data = - &op.u.modified_memory; + &op->u.modified_memory; rc = modified_memory(d, op_args, data); - const_op = !rc; + *const_op = !rc; break; } case XEN_DMOP_set_mem_type: { struct xen_dm_op_set_mem_type *data = - &op.u.set_mem_type; + &op->u.set_mem_type; - const_op = false; + *const_op = false; rc = -EINVAL; if ( data->pad ) @@ -622,7 +462,7 @@ static int dm_op(const struct dmop_args *op_args) case XEN_DMOP_inject_event: { const struct xen_dm_op_inject_event *data = - &op.u.inject_event; + &op->u.inject_event; rc = -EINVAL; if ( data->pad0 || data->pad1 ) @@ -635,7 +475,7 @@ static int dm_op(const struct dmop_args *op_args) case XEN_DMOP_inject_msi: { const struct xen_dm_op_inject_msi *data = - &op.u.inject_msi; + &op->u.inject_msi; rc = -EINVAL; if ( data->pad ) @@ -648,7 +488,7 @@ static int dm_op(const struct dmop_args *op_args) case XEN_DMOP_remote_shutdown: { const struct xen_dm_op_remote_shutdown *data = - &op.u.remote_shutdown; + &op->u.remote_shutdown; domain_shutdown(d, data->reason); rc = 0; @@ -657,7 +497,7 @@ static int dm_op(const struct dmop_args *op_args) case XEN_DMOP_relocate_memory: { - struct xen_dm_op_relocate_memory *data = &op.u.relocate_memory; + struct xen_dm_op_relocate_memory *data = &op->u.relocate_memory; struct xen_add_to_physmap xatp = { .domid = op_args->domid, .size = data->size, @@ -680,7 +520,7 @@ static int dm_op(const struct dmop_args *op_args) data->size -= rc; data->src_gfn += rc; data->dst_gfn += rc; - const_op = false; + *const_op = false; rc = -ERESTART; } break; @@ -689,7 +529,7 @@ static int dm_op(const struct dmop_args *op_args) case XEN_DMOP_pin_memory_cacheattr: { const struct xen_dm_op_pin_memory_cacheattr *data = - &op.u.pin_memory_cacheattr; + &op->u.pin_memory_cacheattr; if ( data->pad ) { @@ -707,97 +547,6 @@ static int dm_op(const struct dmop_args *op_args) break; } - if ( (!rc || rc == -ERESTART) && - !const_op && copy_to_guest_offset(op_args->buf[0].h, offset, - (void *)&op.u, op_size[op.op]) ) - rc = -EFAULT; - - out: - rcu_unlock_domain(d); - - return rc; -} - -#include - -CHECK_dm_op_create_ioreq_server; -CHECK_dm_op_get_ioreq_server_info; -CHECK_dm_op_ioreq_server_range; -CHECK_dm_op_set_ioreq_server_state; -CHECK_dm_op_destroy_ioreq_server; -CHECK_dm_op_track_dirty_vram; -CHECK_dm_op_set_pci_intx_level; -CHECK_dm_op_set_isa_irq_level; -CHECK_dm_op_set_pci_link_route; -CHECK_dm_op_modified_memory; -CHECK_dm_op_set_mem_type; -CHECK_dm_op_inject_event; -CHECK_dm_op_inject_msi; -CHECK_dm_op_map_mem_type_to_ioreq_server; -CHECK_dm_op_remote_shutdown; -CHECK_dm_op_relocate_memory; -CHECK_dm_op_pin_memory_cacheattr; - -int compat_dm_op(domid_t domid, - unsigned int nr_bufs, - XEN_GUEST_HANDLE_PARAM(void) bufs) -{ - struct dmop_args args; - unsigned int i; - int rc; - - if ( nr_bufs > ARRAY_SIZE(args.buf) ) - return -E2BIG; - - args.domid = domid; - args.nr_bufs = array_index_nospec(nr_bufs, ARRAY_SIZE(args.buf) + 1); - - for ( i = 0; i < args.nr_bufs; i++ ) - { - struct compat_dm_op_buf cmp; - - if ( copy_from_guest_offset(&cmp, bufs, i, 1) ) - return -EFAULT; - -#define XLAT_dm_op_buf_HNDL_h(_d_, _s_) \ - guest_from_compat_handle((_d_)->h, (_s_)->h) - - XLAT_dm_op_buf(&args.buf[i], &cmp); - -#undef XLAT_dm_op_buf_HNDL_h - } - - rc = dm_op(&args); - - if ( rc == -ERESTART ) - rc = hypercall_create_continuation(__HYPERVISOR_dm_op, "iih", - domid, nr_bufs, bufs); - - return rc; -} - -long do_dm_op(domid_t domid, - unsigned int nr_bufs, - XEN_GUEST_HANDLE_PARAM(xen_dm_op_buf_t) bufs) -{ - struct dmop_args args; - int rc; - - if ( nr_bufs > ARRAY_SIZE(args.buf) ) - return -E2BIG; - - args.domid = domid; - args.nr_bufs = array_index_nospec(nr_bufs, ARRAY_SIZE(args.buf) + 1); - - if ( copy_from_guest_offset(&args.buf[0], bufs, 0, args.nr_bufs) ) - return -EFAULT; - - rc = dm_op(&args); - - if ( rc == -ERESTART ) - rc = hypercall_create_continuation(__HYPERVISOR_dm_op, "iih", - domid, nr_bufs, bufs); - return rc; } diff --git a/xen/common/Makefile b/xen/common/Makefile index c0e91c4..460f214 100644 --- a/xen/common/Makefile +++ b/xen/common/Makefile @@ -6,6 +6,7 @@ obj-$(CONFIG_CORE_PARKING) += core_parking.o obj-y += cpu.o obj-$(CONFIG_DEBUG_TRACE) += debugtrace.o obj-$(CONFIG_HAS_DEVICE_TREE) += device_tree.o +obj-$(CONFIG_IOREQ_SERVER) += dm.o obj-y += domain.o obj-y += event_2l.o obj-y += event_channel.o diff --git a/xen/common/dm.c b/xen/common/dm.c new file mode 100644 index 0000000..36e01a2 --- /dev/null +++ b/xen/common/dm.c @@ -0,0 +1,291 @@ +/* + * Copyright (c) 2016 Citrix Systems Inc. + * Copyright (c) 2019 Arm ltd. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License along with + * this program; If not, see . + */ + +#include +#include +#include +#include +#include + +static int dm_op(const struct dmop_args *op_args) +{ + struct domain *d; + struct xen_dm_op op; + long rc; + bool const_op = true; + const size_t offset = offsetof(struct xen_dm_op, u); + + static const uint8_t op_size[] = { + [XEN_DMOP_create_ioreq_server] = sizeof(struct xen_dm_op_create_ioreq_server), + [XEN_DMOP_get_ioreq_server_info] = sizeof(struct xen_dm_op_get_ioreq_server_info), + [XEN_DMOP_map_io_range_to_ioreq_server] = sizeof(struct xen_dm_op_ioreq_server_range), + [XEN_DMOP_unmap_io_range_from_ioreq_server] = sizeof(struct xen_dm_op_ioreq_server_range), + [XEN_DMOP_set_ioreq_server_state] = sizeof(struct xen_dm_op_set_ioreq_server_state), + [XEN_DMOP_destroy_ioreq_server] = sizeof(struct xen_dm_op_destroy_ioreq_server), + [XEN_DMOP_track_dirty_vram] = sizeof(struct xen_dm_op_track_dirty_vram), + [XEN_DMOP_set_pci_intx_level] = sizeof(struct xen_dm_op_set_pci_intx_level), + [XEN_DMOP_set_isa_irq_level] = sizeof(struct xen_dm_op_set_isa_irq_level), + [XEN_DMOP_set_pci_link_route] = sizeof(struct xen_dm_op_set_pci_link_route), + [XEN_DMOP_modified_memory] = sizeof(struct xen_dm_op_modified_memory), + [XEN_DMOP_set_mem_type] = sizeof(struct xen_dm_op_set_mem_type), + [XEN_DMOP_inject_event] = sizeof(struct xen_dm_op_inject_event), + [XEN_DMOP_inject_msi] = sizeof(struct xen_dm_op_inject_msi), + [XEN_DMOP_map_mem_type_to_ioreq_server] = sizeof(struct xen_dm_op_map_mem_type_to_ioreq_server), + [XEN_DMOP_remote_shutdown] = sizeof(struct xen_dm_op_remote_shutdown), + [XEN_DMOP_relocate_memory] = sizeof(struct xen_dm_op_relocate_memory), + [XEN_DMOP_pin_memory_cacheattr] = sizeof(struct xen_dm_op_pin_memory_cacheattr), + }; + + rc = rcu_lock_remote_domain_by_id(op_args->domid, &d); + if ( rc ) + return rc; + + if ( !is_hvm_domain(d) ) + goto out; + + rc = xsm_dm_op(XSM_DM_PRIV, d); + if ( rc ) + goto out; + + rc = -EFAULT; + if ( op_args->buf[0].size < offset ) + goto out; + + if ( copy_from_guest_offset((void *)&op, op_args->buf[0].h, 0, offset) ) + goto out; + + if ( op.op >= ARRAY_SIZE(op_size) ) + { + rc = -EOPNOTSUPP; + goto out; + } + + op.op = array_index_nospec(op.op, ARRAY_SIZE(op_size)); + + if ( op_args->buf[0].size < offset + op_size[op.op] ) + goto out; + + if ( copy_from_guest_offset((void *)&op.u, op_args->buf[0].h, offset, + op_size[op.op]) ) + goto out; + + rc = -EINVAL; + if ( op.pad ) + goto out; + + switch ( op.op ) + { + case XEN_DMOP_create_ioreq_server: + { + struct xen_dm_op_create_ioreq_server *data = + &op.u.create_ioreq_server; + + const_op = false; + + rc = -EINVAL; + if ( data->pad[0] || data->pad[1] || data->pad[2] ) + break; + + rc = hvm_create_ioreq_server(d, data->handle_bufioreq, + &data->id); + break; + } + + case XEN_DMOP_get_ioreq_server_info: + { + struct xen_dm_op_get_ioreq_server_info *data = + &op.u.get_ioreq_server_info; + const uint16_t valid_flags = XEN_DMOP_no_gfns; + + const_op = false; + + rc = -EINVAL; + if ( data->flags & ~valid_flags ) + break; + + rc = hvm_get_ioreq_server_info(d, data->id, + (data->flags & XEN_DMOP_no_gfns) ? + NULL : (unsigned long *)&data->ioreq_gfn, + (data->flags & XEN_DMOP_no_gfns) ? + NULL : (unsigned long *)&data->bufioreq_gfn, + &data->bufioreq_port); + break; + } + + case XEN_DMOP_map_io_range_to_ioreq_server: + { + const struct xen_dm_op_ioreq_server_range *data = + &op.u.map_io_range_to_ioreq_server; + + rc = -EINVAL; + if ( data->pad ) + break; + + rc = hvm_map_io_range_to_ioreq_server(d, data->id, data->type, + data->start, data->end); + break; + } + + case XEN_DMOP_unmap_io_range_from_ioreq_server: + { + const struct xen_dm_op_ioreq_server_range *data = + &op.u.unmap_io_range_from_ioreq_server; + + rc = -EINVAL; + if ( data->pad ) + break; + + rc = hvm_unmap_io_range_from_ioreq_server(d, data->id, data->type, + data->start, data->end); + break; + } + + case XEN_DMOP_set_ioreq_server_state: + { + const struct xen_dm_op_set_ioreq_server_state *data = + &op.u.set_ioreq_server_state; + + rc = -EINVAL; + if ( data->pad ) + break; + + rc = hvm_set_ioreq_server_state(d, data->id, !!data->enabled); + break; + } + + case XEN_DMOP_destroy_ioreq_server: + { + const struct xen_dm_op_destroy_ioreq_server *data = + &op.u.destroy_ioreq_server; + + rc = -EINVAL; + if ( data->pad ) + break; + + rc = hvm_destroy_ioreq_server(d, data->id); + break; + } + + default: + rc = arch_dm_op(&op, d, op_args, &const_op); + } + + if ( (!rc || rc == -ERESTART) && + !const_op && copy_to_guest_offset(op_args->buf[0].h, offset, + (void *)&op.u, op_size[op.op]) ) + rc = -EFAULT; + + out: + rcu_unlock_domain(d); + + return rc; +} + +#ifdef CONFIG_COMPAT +#include + +CHECK_dm_op_create_ioreq_server; +CHECK_dm_op_get_ioreq_server_info; +CHECK_dm_op_ioreq_server_range; +CHECK_dm_op_set_ioreq_server_state; +CHECK_dm_op_destroy_ioreq_server; +CHECK_dm_op_track_dirty_vram; +CHECK_dm_op_set_pci_intx_level; +CHECK_dm_op_set_isa_irq_level; +CHECK_dm_op_set_pci_link_route; +CHECK_dm_op_modified_memory; +CHECK_dm_op_set_mem_type; +CHECK_dm_op_inject_event; +CHECK_dm_op_inject_msi; +CHECK_dm_op_map_mem_type_to_ioreq_server; +CHECK_dm_op_remote_shutdown; +CHECK_dm_op_relocate_memory; +CHECK_dm_op_pin_memory_cacheattr; + +int compat_dm_op(domid_t domid, + unsigned int nr_bufs, + XEN_GUEST_HANDLE_PARAM(void) bufs) +{ + struct dmop_args args; + unsigned int i; + int rc; + + if ( nr_bufs > ARRAY_SIZE(args.buf) ) + return -E2BIG; + + args.domid = domid; + args.nr_bufs = array_index_nospec(nr_bufs, ARRAY_SIZE(args.buf) + 1); + + for ( i = 0; i < args.nr_bufs; i++ ) + { + struct compat_dm_op_buf cmp; + + if ( copy_from_guest_offset(&cmp, bufs, i, 1) ) + return -EFAULT; + +#define XLAT_dm_op_buf_HNDL_h(_d_, _s_) \ + guest_from_compat_handle((_d_)->h, (_s_)->h) + + XLAT_dm_op_buf(&args.buf[i], &cmp); + +#undef XLAT_dm_op_buf_HNDL_h + } + + rc = dm_op(&args); + + if ( rc == -ERESTART ) + rc = hypercall_create_continuation(__HYPERVISOR_dm_op, "iih", + domid, nr_bufs, bufs); + + return rc; +} +#endif + +long do_dm_op(domid_t domid, + unsigned int nr_bufs, + XEN_GUEST_HANDLE_PARAM(xen_dm_op_buf_t) bufs) +{ + struct dmop_args args; + int rc; + + if ( nr_bufs > ARRAY_SIZE(args.buf) ) + return -E2BIG; + + args.domid = domid; + args.nr_bufs = array_index_nospec(nr_bufs, ARRAY_SIZE(args.buf) + 1); + + if ( copy_from_guest_offset(&args.buf[0], bufs, 0, args.nr_bufs) ) + return -EFAULT; + + rc = dm_op(&args); + + if ( rc == -ERESTART ) + rc = hypercall_create_continuation(__HYPERVISOR_dm_op, "iih", + domid, nr_bufs, bufs); + + return rc; +} + +/* + * Local variables: + * mode: C + * c-file-style: "BSD" + * c-basic-offset: 4 + * tab-width: 4 + * indent-tabs-mode: nil + * End: + */ diff --git a/xen/include/xen/dm.h b/xen/include/xen/dm.h new file mode 100644 index 0000000..ef15edf --- /dev/null +++ b/xen/include/xen/dm.h @@ -0,0 +1,44 @@ +/* + * Copyright (c) 2016 Citrix Systems Inc. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License along with + * this program; If not, see . + */ + +#ifndef __XEN_DM_H__ +#define __XEN_DM_H__ + +#include + +struct dmop_args { + domid_t domid; + unsigned int nr_bufs; + /* Reserve enough buf elements for all current hypercalls. */ + struct xen_dm_op_buf buf[2]; +}; + +int arch_dm_op(struct xen_dm_op *op, + struct domain *d, + const struct dmop_args *op_args, + bool *const_op); + +#endif /* __XEN_DM_H__ */ + +/* + * Local variables: + * mode: C + * c-file-style: "BSD" + * c-basic-offset: 4 + * tab-width: 4 + * indent-tabs-mode: nil + * End: + */ diff --git a/xen/include/xsm/dummy.h b/xen/include/xsm/dummy.h index 7ae3c40..5c61d8e 100644 --- a/xen/include/xsm/dummy.h +++ b/xen/include/xsm/dummy.h @@ -707,14 +707,14 @@ static XSM_INLINE int xsm_pmu_op (XSM_DEFAULT_ARG struct domain *d, unsigned int } } +#endif /* CONFIG_X86 */ + static XSM_INLINE int xsm_dm_op(XSM_DEFAULT_ARG struct domain *d) { XSM_ASSERT_ACTION(XSM_DM_PRIV); return xsm_default_action(action, current->domain, d); } -#endif /* CONFIG_X86 */ - #ifdef CONFIG_ARGO static XSM_INLINE int xsm_argo_enable(const struct domain *d) { diff --git a/xen/include/xsm/xsm.h b/xen/include/xsm/xsm.h index 7bd03d8..91ecff4 100644 --- a/xen/include/xsm/xsm.h +++ b/xen/include/xsm/xsm.h @@ -176,8 +176,8 @@ struct xsm_operations { int (*ioport_permission) (struct domain *d, uint32_t s, uint32_t e, uint8_t allow); int (*ioport_mapping) (struct domain *d, uint32_t s, uint32_t e, uint8_t allow); int (*pmu_op) (struct domain *d, unsigned int op); - int (*dm_op) (struct domain *d); #endif + int (*dm_op) (struct domain *d); int (*xen_version) (uint32_t cmd); int (*domain_resource_map) (struct domain *d); #ifdef CONFIG_ARGO @@ -682,13 +682,13 @@ static inline int xsm_pmu_op (xsm_default_t def, struct domain *d, unsigned int return xsm_ops->pmu_op(d, op); } +#endif /* CONFIG_X86 */ + static inline int xsm_dm_op(xsm_default_t def, struct domain *d) { return xsm_ops->dm_op(d); } -#endif /* CONFIG_X86 */ - static inline int xsm_xen_version (xsm_default_t def, uint32_t op) { return xsm_ops->xen_version(op); diff --git a/xen/xsm/dummy.c b/xen/xsm/dummy.c index 9e09512..8bdffe7 100644 --- a/xen/xsm/dummy.c +++ b/xen/xsm/dummy.c @@ -147,8 +147,8 @@ void __init xsm_fixup_ops (struct xsm_operations *ops) set_to_dummy_if_null(ops, ioport_permission); set_to_dummy_if_null(ops, ioport_mapping); set_to_dummy_if_null(ops, pmu_op); - set_to_dummy_if_null(ops, dm_op); #endif + set_to_dummy_if_null(ops, dm_op); set_to_dummy_if_null(ops, xen_version); set_to_dummy_if_null(ops, domain_resource_map); #ifdef CONFIG_ARGO diff --git a/xen/xsm/flask/hooks.c b/xen/xsm/flask/hooks.c index 19b0d9e..11784d7 100644 --- a/xen/xsm/flask/hooks.c +++ b/xen/xsm/flask/hooks.c @@ -1656,14 +1656,13 @@ static int flask_pmu_op (struct domain *d, unsigned int op) return -EPERM; } } +#endif /* CONFIG_X86 */ static int flask_dm_op(struct domain *d) { return current_has_perm(d, SECCLASS_HVM, HVM__DM); } -#endif /* CONFIG_X86 */ - static int flask_xen_version (uint32_t op) { u32 dsid = domain_sid(current->domain); @@ -1865,8 +1864,8 @@ static struct xsm_operations flask_ops = { .ioport_permission = flask_ioport_permission, .ioport_mapping = flask_ioport_mapping, .pmu_op = flask_pmu_op, - .dm_op = flask_dm_op, #endif + .dm_op = flask_dm_op, .xen_version = flask_xen_version, .domain_resource_map = flask_domain_resource_map, #ifdef CONFIG_ARGO -- 2.7.4