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/******************************************************************************
* Arch-specific dom0_ops.c
*
* Process command requests from domain-0 guest OS.
*
* Copyright (c) 2002, K A Fraser
*/
#include <xen/config.h>
#include <xen/types.h>
#include <xen/lib.h>
#include <xen/mm.h>
#include <public/dom0_ops.h>
#include <xen/sched.h>
#include <xen/event.h>
#include <asm/pdb.h>
#include <xen/trace.h>
#include <xen/console.h>
#include <public/sched_ctl.h>
long arch_do_dom0_op(dom0_op_t *op, dom0_op_t *u_dom0_op)
{
long ret = 0;
if ( !IS_PRIV(current->domain) )
return -EPERM;
switch ( op->cmd )
{
case DOM0_GETPAGEFRAMEINFO:
{
struct pfn_info *page;
unsigned long pfn = op->u.getpageframeinfo.pfn;
domid_t dom = op->u.getpageframeinfo.domain;
struct domain *d;
ret = -EINVAL;
if ( unlikely(pfn >= max_page) ||
unlikely((d = find_domain_by_id(dom)) == NULL) )
break;
page = &frame_table[pfn];
if ( likely(get_page(page, d)) )
{
ret = 0;
op->u.getpageframeinfo.type = NOTAB;
if ( (page->u.inuse.type_info & PGT_count_mask) != 0 )
{
switch ( page->u.inuse.type_info & PGT_type_mask )
{
default:
panic("No such page type\n");
break;
}
}
put_page(page);
}
put_domain(d);
copy_to_user(u_dom0_op, op, sizeof(*op));
}
break;
case DOM0_GETPAGEFRAMEINFO2:
{
#define GPF2_BATCH 128
int n,j;
int num = op->u.getpageframeinfo2.num;
domid_t dom = op->u.getpageframeinfo2.domain;
unsigned long *s_ptr = (unsigned long*) op->u.getpageframeinfo2.array;
struct domain *d;
unsigned long *l_arr;
ret = -ESRCH;
if ( unlikely((d = find_domain_by_id(dom)) == NULL) )
break;
if ( unlikely(num > 1024) )
{
ret = -E2BIG;
break;
}
l_arr = (unsigned long *)alloc_xenheap_page();
ret = 0;
for( n = 0; n < num; )
{
int k = ((num-n)>GPF2_BATCH)?GPF2_BATCH:(num-n);
if ( copy_from_user(l_arr, &s_ptr[n], k*sizeof(unsigned long)) )
{
ret = -EINVAL;
break;
}
for( j = 0; j < k; j++ )
{
struct pfn_info *page;
unsigned long mfn = l_arr[j];
if ( unlikely(mfn >= max_page) )
goto e2_err;
page = &frame_table[mfn];
if ( likely(get_page(page, d)) )
{
unsigned long type = 0;
switch( page->u.inuse.type_info & PGT_type_mask )
{
default:
panic("No such page type\n");
break;
}
if ( page->u.inuse.type_info & PGT_pinned )
type |= LPINTAB;
l_arr[j] |= type;
put_page(page);
}
else
{
e2_err:
l_arr[j] |= XTAB;
}
}
if ( copy_to_user(&s_ptr[n], l_arr, k*sizeof(unsigned long)) )
{
ret = -EINVAL;
break;
}
n += j;
}
free_xenheap_page((unsigned long)l_arr);
put_domain(d);
}
break;
#ifndef CONFIG_VTI
/*
* NOTE: DOM0_GETMEMLIST has somewhat different semantics on IA64 -
* it actually allocates and maps pages.
*/
case DOM0_GETMEMLIST:
{
unsigned long i;
struct domain *d = find_domain_by_id(op->u.getmemlist.domain);
unsigned long start_page = op->u.getmemlist.max_pfns >> 32;
unsigned long nr_pages = op->u.getmemlist.max_pfns & 0xffffffff;
unsigned long pfn;
unsigned long *buffer = op->u.getmemlist.buffer;
struct page *page;
ret = -EINVAL;
if ( d != NULL )
{
ret = 0;
for ( i = start_page; i < (start_page + nr_pages); i++ )
{
page = map_new_domain_page(d, i << PAGE_SHIFT);
if ( page == NULL )
{
ret = -ENOMEM;
break;
}
pfn = page_to_pfn(page);
if ( put_user(pfn, buffer) )
{
ret = -EFAULT;
break;
}
buffer++;
}
op->u.getmemlist.num_pfns = i - start_page;
copy_to_user(u_dom0_op, op, sizeof(*op));
put_domain(d);
}
}
break;
#else
case DOM0_GETMEMLIST:
{
int i;
struct domain *d = find_domain_by_id(op->u.getmemlist.domain);
unsigned long max_pfns = op->u.getmemlist.max_pfns;
unsigned long pfn;
unsigned long *buffer = op->u.getmemlist.buffer;
struct list_head *list_ent;
ret = -EINVAL;
if (!d) {
ret = 0;
spin_lock(&d->page_alloc_lock);
list_ent = d->page_list.next;
for (i = 0; (i < max_pfns) && (list_ent != &d->page_list); i++) {
pfn = list_entry(list_ent, struct pfn_info, list) -
frame_table;
if (put_user(pfn, buffer)) {
ret = -EFAULT;
break;
}
buffer++;
list_ent = frame_table[pfn].list.next;
}
spin_unlock(&d->page_alloc_lock);
op->u.getmemlist.num_pfns = i;
copy_to_user(u_dom0_op, op, sizeof(*op));
put_domain(d);
}
}
break;
#endif // CONFIG_VTI
default:
ret = -ENOSYS;
}
return ret;
}
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