static int e820_host_sanitize(libxl__gc *gc,
libxl_domain_build_info *b_info,
struct e820entry map[],
uint32_t *nr)
{
int rc;
rc = xc_get_machine_memory_map(CTX->xch, map, *nr);
if (rc < 0)
return ERROR_FAIL;
*nr = rc;
rc = e820_sanitize(gc, map, nr, b_info->target_memkb,
(b_info->max_memkb - b_info->target_memkb) +
b_info->u.pv.slack_memkb);
return rc;
}
static int libxl__e820_alloc(libxl__gc *gc, uint32_t domid,
libxl_domain_config *d_config)
{
libxl_ctx *ctx = libxl__gc_owner(gc);
int rc;
uint32_t nr;
struct e820entry map[E820MAX];
libxl_domain_build_info *b_info;
if (d_config == NULL || d_config->c_info.type == LIBXL_DOMAIN_TYPE_HVM)
return ERROR_INVAL;
b_info = &d_config->b_info;
if (!libxl_defbool_val(b_info->u.pv.e820_host))
return ERROR_INVAL;
rc = xc_get_machine_memory_map(ctx->xch, map, E820MAX);
if (rc < 0) {
errno = rc;
return ERROR_FAIL;
}
nr = rc;
rc = e820_sanitize(ctx, map, &nr, b_info->target_memkb,
(b_info->max_memkb - b_info->target_memkb) +
b_info->u.pv.slack_memkb);
if (rc)
return ERROR_FAIL;
rc = xc_domain_set_memory_map(ctx->xch, domid, map, nr);
if (rc < 0) {
errno = rc;
return ERROR_FAIL;
}
return 0;
}
/*
* Checks for the beginnig and end of RAM in e820 map for domain
* and aligns start of first and end of last vNUMA memory block to
* that map. vnode memory size are passed here Megabytes.
* For PV guest e820 map has fixed hole sizes.
*/
int libxl__vnuma_align_mem(libxl__gc *gc,
uint32_t domid,
libxl_domain_build_info *b_info, /* IN: mem sizes */
vmemrange_t *memblks) /* OUT: linux numa blocks in pfn */
{
int i, j, rc;
uint64_t next_start_pfn, end_max = 0, size, mem_hole;
uint32_t nr;
struct e820entry map[E820MAX];
if (b_info->nr_vnodes == 0)
return -EINVAL;
libxl_ctx *ctx = libxl__gc_owner(gc);
/* retreive e820 map for this host */
rc = xc_get_machine_memory_map(ctx->xch, map, E820MAX);
if (rc < 0) {
errno = rc;
return -EINVAL;
}
nr = rc;
rc = e820_sanitize(ctx, map, &nr, b_info->target_memkb,
(b_info->max_memkb - b_info->target_memkb) +
b_info->u.pv.slack_memkb);
if (rc)
{
errno = rc;
return -EINVAL;
}
/* max pfn for this host */
for (j = nr - 1; j >= 0; j--)
if (map[j].type == E820_RAM) {
end_max = map[j].addr + map[j].size;
break;
}
memset(memblks, 0, sizeof(*memblks) * b_info->nr_vnodes);
next_start_pfn = 0;
memblks[0].start = map[0].addr;
for(i = 0; i < b_info->nr_vnodes; i++) {
/* start can be not zero */
memblks[i].start += next_start_pfn;
memblks[i].end = memblks[i].start + (b_info->vnuma_memszs[i] << 20);
size = memblks[i].end - memblks[i].start;
/*
* For pv host with e820_host option turned on we need
* to rake into account memory holes. For pv host with
* e820_host disabled or unset, the map is contiguous
* RAM region.
*/
if (libxl_defbool_val(b_info->u.pv.e820_host)) {
while (mem_hole = e820_memory_hole_size(memblks[i].start,
memblks[i].end, map, nr),
memblks[i].end - memblks[i].start - mem_hole < size)
{
memblks[i].end += mem_hole;
if (memblks[i].end > end_max) {
memblks[i].end = end_max;
break;
}
}
}
next_start_pfn = memblks[i].end;
}
if (memblks[i-1].end > end_max)
memblks[i-1].end = end_max;
return 0;
}
