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/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that 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, write to the Free Software
* Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* Tristan Gingold <tristan.gingold@bull.net>
*
* Copyright (c) 2007
* Isaku Yamahata <yamahata at valinux co jp>
* VA Linux Systems Japan K.K.
* consolidate mini and inline version.
*/
#include <linux/module.h>
#include <xen/interface/xen.h>
#include <xen/interface/memory.h>
#include <xen/interface/grant_table.h>
#include <xen/interface/callback.h>
#include <xen/interface/vcpu.h>
#include <asm/xen/hypervisor.h>
#include <asm/xen/xencomm.h>
/* Xencomm notes:
* This file defines hypercalls to be used by xencomm. The hypercalls simply
* create inlines or mini descriptors for pointers and then call the raw arch
* hypercall xencomm_arch_hypercall_XXX
*
* If the arch wants to directly use these hypercalls, simply define macros
* in asm/xen/hypercall.h, eg:
* #define HYPERVISOR_sched_op xencomm_hypercall_sched_op
*
* The arch may also define HYPERVISOR_xxx as a function and do more operations
* before/after doing the hypercall.
*
* Note: because only inline or mini descriptors are created these functions
* must only be called with in kernel memory parameters.
*/
int
xencomm_hypercall_console_io(int cmd, int count, char *str)
{
/* xen early printk uses console io hypercall before
* xencomm initialization. In that case, we just ignore it.
*/
if (!xencomm_is_initialized())
return 0;
return xencomm_arch_hypercall_console_io
(cmd, count, xencomm_map_no_alloc(str, count));
}
EXPORT_SYMBOL_GPL(xencomm_hypercall_console_io);
int
xencomm_hypercall_event_channel_op(int cmd, void *op)
{
struct xencomm_handle *desc;
desc = xencomm_map_no_alloc(op, sizeof(struct evtchn_op));
if (desc == NULL)
return -EINVAL;
return xencomm_arch_hypercall_event_channel_op(cmd, desc);
}
EXPORT_SYMBOL_GPL(xencomm_hypercall_event_channel_op);
int
xencomm_hypercall_xen_version(int cmd, void *arg)
{
struct xencomm_handle *desc;
unsigned int argsize;
switch (cmd) {
case XENVER_version:
/* do not actually pass an argument */
return xencomm_arch_hypercall_xen_version(cmd, 0);
case XENVER_extraversion:
argsize = sizeof(struct xen_extraversion);
break;
case XENVER_compile_info:
argsize = sizeof(struct xen_compile_info);
break;
case XENVER_capabilities:
argsize = sizeof(struct xen_capabilities_info);
break;
case XENVER_changeset:
argsize = sizeof(struct xen_changeset_info);
break;
case XENVER_platform_parameters:
argsize = sizeof(struct xen_platform_parameters);
break;
case XENVER_get_features:
argsize = (arg == NULL) ? 0 : sizeof(struct xen_feature_info);
break;
default:
printk(KERN_DEBUG
"%s: unknown version op %d\n", __func__, cmd);
return -ENOSYS;
}
desc = xencomm_map_no_alloc(arg, argsize);
if (desc == NULL)
return -EINVAL;
return xencomm_arch_hypercall_xen_version(cmd, desc);
}
EXPORT_SYMBOL_GPL(xencomm_hypercall_xen_version);
int
xencomm_hypercall_physdev_op(int cmd, void *op)
{
unsigned int argsize;
switch (cmd) {
case PHYSDEVOP_apic_read:
case PHYSDEVOP_apic_write:
argsize = sizeof(struct physdev_apic);
break;
case PHYSDEVOP_alloc_irq_vector:
case PHYSDEVOP_free_irq_vector:
argsize = sizeof(struct physdev_irq);
break;
case PHYSDEVOP_irq_status_query:
argsize = sizeof(struct physdev_irq_status_query);
break;
default:
printk(KERN_DEBUG
"%s: unknown physdev op %d\n", __func__, cmd);
return -ENOSYS;
}
return xencomm_arch_hypercall_physdev_op
(cmd, xencomm_map_no_alloc(op, argsize));
}
static int
xencommize_grant_table_op(struct xencomm_mini **xc_area,
unsigned int cmd, void *op, unsigned int count,
struct xencomm_handle **desc)
{
struct xencomm_handle *desc1;
unsigned int argsize;
switch (cmd) {
case GNTTABOP_map_grant_ref:
argsize = sizeof(struct gnttab_map_grant_ref);
break;
case GNTTABOP_unmap_grant_ref:
argsize = sizeof(struct gnttab_unmap_grant_ref);
break;
case GNTTABOP_setup_table:
{
struct gnttab_setup_table *setup = op;
argsize = sizeof(*setup);
if (count != 1)
return -EINVAL;
desc1 = __xencomm_map_no_alloc
(xen_guest_handle(setup->frame_list),
setup->nr_frames *
sizeof(*xen_guest_handle(setup->frame_list)),
*xc_area);
if (desc1 == NULL)
return -EINVAL;
(*xc_area)++;
set_xen_guest_handle(setup->frame_list, (void *)desc1);
break;
}
case GNTTABOP_dump_table:
argsize = sizeof(struct gnttab_dump_table);
break;
case GNTTABOP_transfer:
argsize = sizeof(struct gnttab_transfer);
break;
case GNTTABOP_copy:
argsize = sizeof(struct gnttab_copy);
break;
case GNTTABOP_query_size:
argsize = sizeof(struct gnttab_query_size);
break;
default:
printk(KERN_DEBUG "%s: unknown hypercall grant table op %d\n",
__func__, cmd);
BUG();
}
*desc = __xencomm_map_no_alloc(op, count * argsize, *xc_area);
if (*desc == NULL)
return -EINVAL;
(*xc_area)++;
return 0;
}
int
xencomm_hypercall_grant_table_op(unsigned int cmd, void *op,
unsigned int count)
{
int rc;
struct xencomm_handle *desc;
XENCOMM_MINI_ALIGNED(xc_area, 2);
rc = xencommize_grant_table_op(&xc_area, cmd, op, count, &desc);
if (rc)
return rc;
return xencomm_arch_hypercall_grant_table_op(cmd, desc, count);
}
EXPORT_SYMBOL_GPL(xencomm_hypercall_grant_table_op);
int
xencomm_hypercall_sched_op(int cmd, void *arg)
{
struct xencomm_handle *desc;
unsigned int argsize;
switch (cmd) {
case SCHEDOP_yield:
case SCHEDOP_block:
argsize = 0;
break;
case SCHEDOP_shutdown:
argsize = sizeof(struct sched_shutdown);
break;
case SCHEDOP_poll:
{
struct sched_poll *poll = arg;
struct xencomm_handle *ports;
argsize = sizeof(struct sched_poll);
ports = xencomm_map_no_alloc(xen_guest_handle(poll->ports),
sizeof(*xen_guest_handle(poll->ports)));
set_xen_guest_handle(poll->ports, (void *)ports);
break;
}
default:
printk(KERN_DEBUG "%s: unknown sched op %d\n", __func__, cmd);
return -ENOSYS;
}
desc = xencomm_map_no_alloc(arg, argsize);
if (desc == NULL)
return -EINVAL;
return xencomm_arch_hypercall_sched_op(cmd, desc);
}
EXPORT_SYMBOL_GPL(xencomm_hypercall_sched_op);
int
xencomm_hypercall_multicall(void *call_list, int nr_calls)
{
int rc;
int i;
struct multicall_entry *mce;
struct xencomm_handle *desc;
XENCOMM_MINI_ALIGNED(xc_area, nr_calls * 2);
for (i = 0; i < nr_calls; i++) {
mce = (struct multicall_entry *)call_list + i;
switch (mce->op) {
case __HYPERVISOR_update_va_mapping:
case __HYPERVISOR_mmu_update:
/* No-op on ia64. */
break;
case __HYPERVISOR_grant_table_op:
rc = xencommize_grant_table_op
(&xc_area,
mce->args[0], (void *)mce->args[1],
mce->args[2], &desc);
if (rc)
return rc;
mce->args[1] = (unsigned long)desc;
break;
case __HYPERVISOR_memory_op:
default:
printk(
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