442 lines
11 KiB
C
442 lines
11 KiB
C
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/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* Tristan Gingold <tristan.gingold@bull.net>
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*
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* Copyright (c) 2007
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* Isaku Yamahata <yamahata at valinux co jp>
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* VA Linux Systems Japan K.K.
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* consolidate mini and inline version.
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*/
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#include <linux/module.h>
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#include <xen/interface/xen.h>
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#include <xen/interface/memory.h>
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#include <xen/interface/grant_table.h>
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#include <xen/interface/callback.h>
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#include <xen/interface/vcpu.h>
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#include <asm/xen/hypervisor.h>
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#include <asm/xen/xencomm.h>
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/* Xencomm notes:
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* This file defines hypercalls to be used by xencomm. The hypercalls simply
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* create inlines or mini descriptors for pointers and then call the raw arch
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* hypercall xencomm_arch_hypercall_XXX
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*
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* If the arch wants to directly use these hypercalls, simply define macros
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* in asm/xen/hypercall.h, eg:
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* #define HYPERVISOR_sched_op xencomm_hypercall_sched_op
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*
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* The arch may also define HYPERVISOR_xxx as a function and do more operations
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* before/after doing the hypercall.
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*
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* Note: because only inline or mini descriptors are created these functions
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* must only be called with in kernel memory parameters.
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*/
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int
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xencomm_hypercall_console_io(int cmd, int count, char *str)
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{
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/* xen early printk uses console io hypercall before
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* xencomm initialization. In that case, we just ignore it.
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*/
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if (!xencomm_is_initialized())
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return 0;
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return xencomm_arch_hypercall_console_io
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(cmd, count, xencomm_map_no_alloc(str, count));
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}
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EXPORT_SYMBOL_GPL(xencomm_hypercall_console_io);
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int
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xencomm_hypercall_event_channel_op(int cmd, void *op)
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{
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struct xencomm_handle *desc;
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desc = xencomm_map_no_alloc(op, sizeof(struct evtchn_op));
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if (desc == NULL)
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return -EINVAL;
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return xencomm_arch_hypercall_event_channel_op(cmd, desc);
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}
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EXPORT_SYMBOL_GPL(xencomm_hypercall_event_channel_op);
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int
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xencomm_hypercall_xen_version(int cmd, void *arg)
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{
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struct xencomm_handle *desc;
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unsigned int argsize;
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switch (cmd) {
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case XENVER_version:
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/* do not actually pass an argument */
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return xencomm_arch_hypercall_xen_version(cmd, 0);
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case XENVER_extraversion:
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argsize = sizeof(struct xen_extraversion);
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break;
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case XENVER_compile_info:
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argsize = sizeof(struct xen_compile_info);
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break;
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case XENVER_capabilities:
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argsize = sizeof(struct xen_capabilities_info);
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break;
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case XENVER_changeset:
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argsize = sizeof(struct xen_changeset_info);
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break;
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case XENVER_platform_parameters:
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argsize = sizeof(struct xen_platform_parameters);
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break;
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case XENVER_get_features:
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argsize = (arg == NULL) ? 0 : sizeof(struct xen_feature_info);
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break;
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default:
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printk(KERN_DEBUG
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"%s: unknown version op %d\n", __func__, cmd);
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return -ENOSYS;
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}
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desc = xencomm_map_no_alloc(arg, argsize);
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if (desc == NULL)
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return -EINVAL;
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return xencomm_arch_hypercall_xen_version(cmd, desc);
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}
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EXPORT_SYMBOL_GPL(xencomm_hypercall_xen_version);
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int
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xencomm_hypercall_physdev_op(int cmd, void *op)
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{
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unsigned int argsize;
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switch (cmd) {
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case PHYSDEVOP_apic_read:
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case PHYSDEVOP_apic_write:
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argsize = sizeof(struct physdev_apic);
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break;
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case PHYSDEVOP_alloc_irq_vector:
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case PHYSDEVOP_free_irq_vector:
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argsize = sizeof(struct physdev_irq);
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break;
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case PHYSDEVOP_irq_status_query:
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argsize = sizeof(struct physdev_irq_status_query);
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break;
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default:
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printk(KERN_DEBUG
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"%s: unknown physdev op %d\n", __func__, cmd);
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return -ENOSYS;
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}
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return xencomm_arch_hypercall_physdev_op
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(cmd, xencomm_map_no_alloc(op, argsize));
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}
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static int
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xencommize_grant_table_op(struct xencomm_mini **xc_area,
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unsigned int cmd, void *op, unsigned int count,
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struct xencomm_handle **desc)
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{
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struct xencomm_handle *desc1;
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unsigned int argsize;
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switch (cmd) {
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case GNTTABOP_map_grant_ref:
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argsize = sizeof(struct gnttab_map_grant_ref);
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break;
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case GNTTABOP_unmap_grant_ref:
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argsize = sizeof(struct gnttab_unmap_grant_ref);
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break;
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case GNTTABOP_setup_table:
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{
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struct gnttab_setup_table *setup = op;
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argsize = sizeof(*setup);
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if (count != 1)
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return -EINVAL;
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desc1 = __xencomm_map_no_alloc
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(xen_guest_handle(setup->frame_list),
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setup->nr_frames *
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sizeof(*xen_guest_handle(setup->frame_list)),
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*xc_area);
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if (desc1 == NULL)
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return -EINVAL;
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(*xc_area)++;
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set_xen_guest_handle(setup->frame_list, (void *)desc1);
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break;
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}
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case GNTTABOP_dump_table:
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argsize = sizeof(struct gnttab_dump_table);
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break;
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case GNTTABOP_transfer:
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argsize = sizeof(struct gnttab_transfer);
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break;
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case GNTTABOP_copy:
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argsize = sizeof(struct gnttab_copy);
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break;
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case GNTTABOP_query_size:
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argsize = sizeof(struct gnttab_query_size);
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break;
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default:
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printk(KERN_DEBUG "%s: unknown hypercall grant table op %d\n",
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__func__, cmd);
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BUG();
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}
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*desc = __xencomm_map_no_alloc(op, count * argsize, *xc_area);
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if (*desc == NULL)
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return -EINVAL;
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(*xc_area)++;
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return 0;
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}
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int
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xencomm_hypercall_grant_table_op(unsigned int cmd, void *op,
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unsigned int count)
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{
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int rc;
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struct xencomm_handle *desc;
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XENCOMM_MINI_ALIGNED(xc_area, 2);
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rc = xencommize_grant_table_op(&xc_area, cmd, op, count, &desc);
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if (rc)
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return rc;
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return xencomm_arch_hypercall_grant_table_op(cmd, desc, count);
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}
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EXPORT_SYMBOL_GPL(xencomm_hypercall_grant_table_op);
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int
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xencomm_hypercall_sched_op(int cmd, void *arg)
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{
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struct xencomm_handle *desc;
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unsigned int argsize;
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switch (cmd) {
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case SCHEDOP_yield:
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case SCHEDOP_block:
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argsize = 0;
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break;
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case SCHEDOP_shutdown:
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argsize = sizeof(struct sched_shutdown);
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break;
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case SCHEDOP_poll:
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{
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struct sched_poll *poll = arg;
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struct xencomm_handle *ports;
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argsize = sizeof(struct sched_poll);
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ports = xencomm_map_no_alloc(xen_guest_handle(poll->ports),
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sizeof(*xen_guest_handle(poll->ports)));
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set_xen_guest_handle(poll->ports, (void *)ports);
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break;
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}
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default:
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printk(KERN_DEBUG "%s: unknown sched op %d\n", __func__, cmd);
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return -ENOSYS;
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}
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desc = xencomm_map_no_alloc(arg, argsize);
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if (desc == NULL)
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return -EINVAL;
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return xencomm_arch_hypercall_sched_op(cmd, desc);
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}
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EXPORT_SYMBOL_GPL(xencomm_hypercall_sched_op);
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int
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xencomm_hypercall_multicall(void *call_list, int nr_calls)
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{
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int rc;
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int i;
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struct multicall_entry *mce;
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struct xencomm_handle *desc;
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XENCOMM_MINI_ALIGNED(xc_area, nr_calls * 2);
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for (i = 0; i < nr_calls; i++) {
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mce = (struct multicall_entry *)call_list + i;
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switch (mce->op) {
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case __HYPERVISOR_update_va_mapping:
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case __HYPERVISOR_mmu_update:
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/* No-op on ia64. */
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break;
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case __HYPERVISOR_grant_table_op:
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rc = xencommize_grant_table_op
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(&xc_area,
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mce->args[0], (void *)mce->args[1],
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mce->args[2], &desc);
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if (rc)
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return rc;
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mce->args[1] = (unsigned long)desc;
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break;
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case __HYPERVISOR_memory_op:
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default:
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printk(KERN_DEBUG
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"%s: unhandled multicall op entry op %lu\n",
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__func__, mce->op);
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return -ENOSYS;
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}
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}
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desc = xencomm_map_no_alloc(call_list,
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nr_calls * sizeof(struct multicall_entry));
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if (desc == NULL)
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return -EINVAL;
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return xencomm_arch_hypercall_multicall(desc, nr_calls);
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}
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EXPORT_SYMBOL_GPL(xencomm_hypercall_multicall);
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int
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xencomm_hypercall_callback_op(int cmd, void *arg)
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{
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unsigned int argsize;
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switch (cmd) {
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case CALLBACKOP_register:
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argsize = sizeof(struct callback_register);
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break;
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case CALLBACKOP_unregister:
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argsize = sizeof(struct callback_unregister);
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break;
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default:
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printk(KERN_DEBUG
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"%s: unknown callback op %d\n", __func__, cmd);
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return -ENOSYS;
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}
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return xencomm_arch_hypercall_callback_op
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(cmd, xencomm_map_no_alloc(arg, argsize));
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}
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static int
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xencommize_memory_reservation(struct xencomm_mini *xc_area,
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struct xen_memory_reservation *mop)
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{
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struct xencomm_handle *desc;
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desc = __xencomm_map_no_alloc(xen_guest_handle(mop->extent_start),
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mop->nr_extents *
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sizeof(*xen_guest_handle(mop->extent_start)),
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xc_area);
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if (desc == NULL)
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return -EINVAL;
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set_xen_guest_handle(mop->extent_start, (void *)desc);
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return 0;
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}
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int
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xencomm_hypercall_memory_op(unsigned int cmd, void *arg)
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{
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GUEST_HANDLE(xen_pfn_t) extent_start_va[2] = { {NULL}, {NULL} };
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struct xen_memory_reservation *xmr = NULL;
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int rc;
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struct xencomm_handle *desc;
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unsigned int argsize;
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XENCOMM_MINI_ALIGNED(xc_area, 2);
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switch (cmd) {
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case XENMEM_increase_reservation:
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case XENMEM_decrease_reservation:
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case XENMEM_populate_physmap:
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xmr = (struct xen_memory_reservation *)arg;
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set_xen_guest_handle(extent_start_va[0],
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xen_guest_handle(xmr->extent_start));
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argsize = sizeof(*xmr);
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rc = xencommize_memory_reservation(xc_area, xmr);
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if (rc)
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return rc;
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xc_area++;
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break;
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case XENMEM_maximum_ram_page:
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argsize = 0;
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break;
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case XENMEM_add_to_physmap:
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argsize = sizeof(struct xen_add_to_physmap);
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break;
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default:
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printk(KERN_DEBUG "%s: unknown memory op %d\n", __func__, cmd);
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return -ENOSYS;
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}
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desc = xencomm_map_no_alloc(arg, argsize);
|
||
|
|
if (desc == NULL)
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
rc = xencomm_arch_hypercall_memory_op(cmd, desc);
|
||
|
|
|
||
|
|
switch (cmd) {
|
||
|
|
case XENMEM_increase_reservation:
|
||
|
|
case XENMEM_decrease_reservation:
|
||
|
|
case XENMEM_populate_physmap:
|
||
|
|
set_xen_guest_handle(xmr->extent_start,
|
||
|
|
xen_guest_handle(extent_start_va[0]));
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
return rc;
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL_GPL(xencomm_hypercall_memory_op);
|
||
|
|
|
||
|
|
int
|
||
|
|
xencomm_hypercall_suspend(unsigned long srec)
|
||
|
|
{
|
||
|
|
struct sched_shutdown arg;
|
||
|
|
|
||
|
|
arg.reason = SHUTDOWN_suspend;
|
||
|
|
|
||
|
|
return xencomm_arch_hypercall_sched_op(
|
||
|
|
SCHEDOP_shutdown, xencomm_map_no_alloc(&arg, sizeof(arg)));
|
||
|
|
}
|
||
|
|
|
||
|
|
long
|
||
|
|
xencomm_hypercall_vcpu_op(int cmd, int cpu, void *arg)
|
||
|
|
{
|
||
|
|
unsigned int argsize;
|
||
|
|
switch (cmd) {
|
||
|
|
case VCPUOP_register_runstate_memory_area: {
|
||
|
|
struct vcpu_register_runstate_memory_area *area =
|
||
|
|
(struct vcpu_register_runstate_memory_area *)arg;
|
||
|
|
argsize = sizeof(*arg);
|
||
|
|
set_xen_guest_handle(area->addr.h,
|
||
|
|
(void *)xencomm_map_no_alloc(area->addr.v,
|
||
|
|
sizeof(area->addr.v)));
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
default:
|
||
|
|
printk(KERN_DEBUG "%s: unknown vcpu op %d\n", __func__, cmd);
|
||
|
|
return -ENOSYS;
|
||
|
|
}
|
||
|
|
|
||
|
|
return xencomm_arch_hypercall_vcpu_op(cmd, cpu,
|
||
|
|
xencomm_map_no_alloc(arg, argsize));
|
||
|
|
}
|
||
|
|
|
||
|
|
long
|
||
|
|
xencomm_hypercall_opt_feature(void *arg)
|
||
|
|
{
|
||
|
|
return xencomm_arch_hypercall_opt_feature(
|
||
|
|
xencomm_map_no_alloc(arg,
|
||
|
|
sizeof(struct xen_ia64_opt_feature)));
|
||
|
|
}
|