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xen: Rearrange xen/init.c to prepare it for Xen PVH mode 

Rearrange grub-core/kern/xen/init.c to prepare adding PVH mode support
to it. This includes putting some code under #ifdef GRUB_MACHINE_XEN
as it will not be used when running as PVH.

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 13:11:34 +01:00 committed by Daniel Kiper
parent 408de833bb
commit bec9edf53f
1 changed files with 34 additions and 26 deletions
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60
grub-core/kern/xen/init.c
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@ -41,9 +41,11 @@ grub_size_t grub_xen_n_allocated_shared_pages;
static grub_xen_mfn_t
grub_xen_ptr2mfn (void *ptr)
{
#ifdef GRUB_MACHINE_XEN
grub_xen_mfn_t *mfn_list =
(grub_xen_mfn_t *) grub_xen_start_page_addr->mfn_list;
return mfn_list[(grub_addr_t) ptr >> GRUB_XEN_LOG_PAGE_SIZE];
#endif
}
void *
@ -104,18 +106,6 @@ grub_machine_get_bootlocation (char **device __attribute__ ((unused)),
{
}
static grub_uint8_t window[GRUB_XEN_PAGE_SIZE]
__attribute__ ((aligned (GRUB_XEN_PAGE_SIZE)));
#ifdef __x86_64__
#define NUMBER_OF_LEVELS 4
#else
#define NUMBER_OF_LEVELS 3
#endif
#define LOG_POINTERS_PER_PAGE 9
#define POINTERS_PER_PAGE (1 << LOG_POINTERS_PER_PAGE)
void
grub_xen_store_send (const void *buf_, grub_size_t len)
{
@ -337,6 +327,19 @@ grub_xen_setup_gnttab (void)
grub_xen_grant_table_op (GNTTABOP_setup_table, &gnttab_setup, 1);
}
#ifdef GRUB_MACHINE_XEN
static grub_uint8_t window[GRUB_XEN_PAGE_SIZE]
__attribute__ ((aligned (GRUB_XEN_PAGE_SIZE)));
#ifdef __x86_64__
#define NUMBER_OF_LEVELS 4
#else
#define NUMBER_OF_LEVELS 3
#endif
#define LOG_POINTERS_PER_PAGE 9
#define POINTERS_PER_PAGE (1 << LOG_POINTERS_PER_PAGE)
#define MAX_N_UNUSABLE_PAGES 4
static int
@ -529,13 +532,30 @@ map_all_pages (void)
grub_mm_init_region ((void *) heap_start, heap_end - heap_start);
}
grub_err_t
grub_machine_mmap_iterate (grub_memory_hook_t hook, void *hook_data)
{
grub_uint64_t total_pages = grub_xen_start_page_addr->nr_pages;
grub_uint64_t usable_pages = grub_xen_start_page_addr->pt_base >> 12;
if (hook (0, page2offset (usable_pages), GRUB_MEMORY_AVAILABLE, hook_data))
return GRUB_ERR_NONE;
hook (page2offset (usable_pages), page2offset (total_pages - usable_pages),
GRUB_MEMORY_RESERVED, hook_data);
return GRUB_ERR_NONE;
}
#endif
extern char _end[];
void
grub_machine_init (void)
{
#ifdef GRUB_MACHINE_XEN
#ifdef __i386__
grub_xen_vm_assist (VMASST_CMD_enable, VMASST_TYPE_pae_extended_cr3);
#endif
#endif
grub_modbase = ALIGN_UP ((grub_addr_t) _end
@ -544,7 +564,9 @@ grub_machine_init (void)
grub_xen_setup_gnttab ();
#ifdef GRUB_MACHINE_XEN
map_all_pages ();
#endif
grub_console_init ();
@ -571,17 +593,3 @@ grub_machine_fini (int flags __attribute__ ((unused)))
grub_xendisk_fini ();
grub_boot_fini ();
}
grub_err_t
grub_machine_mmap_iterate (grub_memory_hook_t hook, void *hook_data)
{
grub_uint64_t total_pages = grub_xen_start_page_addr->nr_pages;
grub_uint64_t usable_pages = grub_xen_start_page_addr->pt_base >> 12;
if (hook (0, page2offset (usable_pages), GRUB_MEMORY_AVAILABLE, hook_data))
return GRUB_ERR_NONE;
hook (page2offset (usable_pages), page2offset (total_pages - usable_pages),
GRUB_MEMORY_RESERVED, hook_data);
return GRUB_ERR_NONE;
}