mirror of
https://github.com/torvalds/linux.git
synced 2024-12-06 11:01:43 +00:00
f021c8b334
On ia64/xen, pointer arguments for hypercall is passed by pseudo physical address(guest physical address.) So such hypercalls needs address conversion functions. This patch implements concrete conversion functions for such hypercalls. Signed-off-by: Akio Takebe <takebe_akio@jp.fujitsu.com> Signed-off-by: Yaozu (Eddie) Dong <eddie.dong@intel.com> Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp> Signed-off-by: Tony Luck <tony.luck@intel.com>
442 lines
11 KiB
C
442 lines
11 KiB
C
/*
|
|
* 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(KERN_DEBUG
|
|
"%s: unhandled multicall op entry op %lu\n",
|
|
__func__, mce->op);
|
|
return -ENOSYS;
|
|
}
|
|
}
|
|
|
|
desc = xencomm_map_no_alloc(call_list,
|
|
nr_calls * sizeof(struct multicall_entry));
|
|
if (desc == NULL)
|
|
return -EINVAL;
|
|
|
|
return xencomm_arch_hypercall_multicall(desc, nr_calls);
|
|
}
|
|
EXPORT_SYMBOL_GPL(xencomm_hypercall_multicall);
|
|
|
|
int
|
|
xencomm_hypercall_callback_op(int cmd, void *arg)
|
|
{
|
|
unsigned int argsize;
|
|
switch (cmd) {
|
|
case CALLBACKOP_register:
|
|
argsize = sizeof(struct callback_register);
|
|
break;
|
|
case CALLBACKOP_unregister:
|
|
argsize = sizeof(struct callback_unregister);
|
|
break;
|
|
default:
|
|
printk(KERN_DEBUG
|
|
"%s: unknown callback op %d\n", __func__, cmd);
|
|
return -ENOSYS;
|
|
}
|
|
|
|
return xencomm_arch_hypercall_callback_op
|
|
(cmd, xencomm_map_no_alloc(arg, argsize));
|
|
}
|
|
|
|
static int
|
|
xencommize_memory_reservation(struct xencomm_mini *xc_area,
|
|
struct xen_memory_reservation *mop)
|
|
{
|
|
struct xencomm_handle *desc;
|
|
|
|
desc = __xencomm_map_no_alloc(xen_guest_handle(mop->extent_start),
|
|
mop->nr_extents *
|
|
sizeof(*xen_guest_handle(mop->extent_start)),
|
|
xc_area);
|
|
if (desc == NULL)
|
|
return -EINVAL;
|
|
|
|
set_xen_guest_handle(mop->extent_start, (void *)desc);
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
xencomm_hypercall_memory_op(unsigned int cmd, void *arg)
|
|
{
|
|
GUEST_HANDLE(xen_pfn_t) extent_start_va[2] = { {NULL}, {NULL} };
|
|
struct xen_memory_reservation *xmr = NULL;
|
|
int rc;
|
|
struct xencomm_handle *desc;
|
|
unsigned int argsize;
|
|
XENCOMM_MINI_ALIGNED(xc_area, 2);
|
|
|
|
switch (cmd) {
|
|
case XENMEM_increase_reservation:
|
|
case XENMEM_decrease_reservation:
|
|
case XENMEM_populate_physmap:
|
|
xmr = (struct xen_memory_reservation *)arg;
|
|
set_xen_guest_handle(extent_start_va[0],
|
|
xen_guest_handle(xmr->extent_start));
|
|
|
|
argsize = sizeof(*xmr);
|
|
rc = xencommize_memory_reservation(xc_area, xmr);
|
|
if (rc)
|
|
return rc;
|
|
xc_area++;
|
|
break;
|
|
|
|
case XENMEM_maximum_ram_page:
|
|
argsize = 0;
|
|
break;
|
|
|
|
case XENMEM_add_to_physmap:
|
|
argsize = sizeof(struct xen_add_to_physmap);
|
|
break;
|
|
|
|
default:
|
|
printk(KERN_DEBUG "%s: unknown memory op %d\n", __func__, cmd);
|
|
return -ENOSYS;
|
|
}
|
|
|
|
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)));
|
|
}
|