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xen: Carve out grant tab initialization into dedicated function

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Initialize the grant tab in a dedicated function. This will enable
using it for PVH guests, too.

Call the new function from grub_machine_init() as this will later
be common between Xen PV and Xen PVH mode.

Signed-off-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
Tested-by: Hans van Kranenburg <hans@knorrie.org>
This commit is contained in:
Juergen Gross 2018-12-07 13:11:31 +01:00 • committed by Daniel Kiper
parent d170be42f1
commit c84927272c
1 changed files with 21 additions and 14 deletions
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35
grub-core/kern/xen/init.c
View file

@ -318,6 +318,25 @@ grub_xenstore_dir (const char *dir,
unsigned long gntframe = 0;
static void
grub_xen_setup_gnttab (void)
{
struct gnttab_set_version gnttab_setver;
struct gnttab_setup_table gnttab_setup;
grub_memset (&gnttab_setver, 0, sizeof (gnttab_setver));
gnttab_setver.version = 1;
grub_xen_grant_table_op (GNTTABOP_set_version, &gnttab_setver, 1);
grub_memset (&gnttab_setup, 0, sizeof (gnttab_setup));
gnttab_setup.dom = DOMID_SELF;
gnttab_setup.nr_frames = 1;
gnttab_setup.frame_list.p = &gntframe;
grub_xen_grant_table_op (GNTTABOP_setup_table, &gnttab_setup, 1);
}
#define MAX_N_UNUSABLE_PAGES 4
static int
@ -357,26 +376,12 @@ map_all_pages (void)
(grub_xen_mfn_t *) grub_xen_start_page_addr->mfn_list;
grub_uint64_t *pg = (grub_uint64_t *) window;
grub_uint64_t oldpgstart, oldpgend;
struct gnttab_setup_table gnttab_setup;
struct gnttab_set_version gnttab_setver;
grub_size_t n_unusable_pages = 0;
struct mmu_update m2p_updates[2 * MAX_N_UNUSABLE_PAGES];
if (total_pages > MAX_TOTAL_PAGES - 4)
total_pages = MAX_TOTAL_PAGES - 4;
grub_memset (&gnttab_setver, 0, sizeof (gnttab_setver));
gnttab_setver.version = 1;
grub_xen_grant_table_op (GNTTABOP_set_version, &gnttab_setver, 1);
grub_memset (&gnttab_setup, 0, sizeof (gnttab_setup));
gnttab_setup.dom = DOMID_SELF;
gnttab_setup.nr_frames = 1;
gnttab_setup.frame_list.p = &gntframe;
grub_xen_grant_table_op (GNTTABOP_setup_table, &gnttab_setup, 1);
for (j = 0; j < total_pages - n_unusable_pages; j++)
while (!grub_xen_is_page_usable (mfn_list[j]))
{
@ -537,6 +542,8 @@ grub_machine_init (void)
+ GRUB_KERNEL_MACHINE_MOD_GAP,
GRUB_KERNEL_MACHINE_MOD_ALIGN);
grub_xen_setup_gnttab ();
map_all_pages ();
grub_console_init ();