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xen: modify page table construction

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Modify the page table construction to allow multiple virtual regions
to be mapped. This is done as preparation for removing the p2m list
from the initial kernel mapping in order to support huge pv domains.

This allows a cleaner approach for mapping the relocator page by
using this capability.

The interface to the assembler level of the relocator has to be changed
in order to be able to process multiple page table areas.

Signed-off-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
This commit is contained in:
Juergen Gross 2016-03-03 10:38:15 +01:00 • committed by Daniel Kiper
parent 5500cefccd
commit b67a95ecad
6 changed files with 358 additions and 233 deletions
Download patch file Download diff file Expand all files Collapse all files

28
grub-core/lib/xen/relocator.c
View file

@ -29,6 +29,11 @@
typedef grub_addr_t grub_xen_reg_t;
struct grub_relocator_xen_paging_area {
grub_xen_reg_t start;
grub_xen_reg_t size;
} GRUB_PACKED;
extern grub_uint8_t grub_relocator_xen_start;
extern grub_uint8_t grub_relocator_xen_end;
extern grub_uint8_t grub_relocator_xen_remap_start;
@ -36,15 +41,16 @@ extern grub_uint8_t grub_relocator_xen_remap_end;
extern grub_xen_reg_t grub_relocator_xen_stack;
extern grub_xen_reg_t grub_relocator_xen_start_info;
extern grub_xen_reg_t grub_relocator_xen_entry_point;
extern grub_xen_reg_t grub_relocator_xen_paging_start;
extern grub_xen_reg_t grub_relocator_xen_paging_size;
extern grub_xen_reg_t grub_relocator_xen_remapper_virt;
extern grub_xen_reg_t grub_relocator_xen_remapper_virt2;
extern grub_xen_reg_t grub_relocator_xen_remapper_map;
extern grub_xen_reg_t grub_relocator_xen_mfn_list;
extern struct grub_relocator_xen_paging_area
grub_relocator_xen_paging_areas[XEN_MAX_MAPPINGS];
extern grub_xen_reg_t grub_relocator_xen_remap_continue;
#ifdef __i386__
extern grub_xen_reg_t grub_relocator_xen_mmu_op_addr;
extern grub_xen_reg_t grub_relocator_xen_paging_areas_addr;
extern grub_xen_reg_t grub_relocator_xen_remapper_map_high;
#endif
extern mmuext_op_t grub_relocator_xen_mmu_op[3];
@ -61,6 +67,7 @@ grub_relocator_xen_boot (struct grub_relocator *rel,
{
grub_err_t err;
void *relst;
int i;
grub_relocator_chunk_t ch, ch_tramp;
grub_xen_mfn_t *mfn_list =
(grub_xen_mfn_t *) grub_xen_start_page_addr->mfn_list;
@ -77,8 +84,11 @@ grub_relocator_xen_boot (struct grub_relocator *rel,
grub_relocator_xen_stack = state.stack;
grub_relocator_xen_start_info = state.start_info;
grub_relocator_xen_entry_point = state.entry_point;
grub_relocator_xen_paging_start = state.paging_start << 12;
grub_relocator_xen_paging_size = state.paging_size;
for (i = 0; i < XEN_MAX_MAPPINGS; i++)
{
grub_relocator_xen_paging_areas[i].start = state.paging_start[i];
grub_relocator_xen_paging_areas[i].size = state.paging_size[i];
}
grub_relocator_xen_remapper_virt = remapper_virt;
grub_relocator_xen_remapper_virt2 = remapper_virt;
grub_relocator_xen_remap_continue = trampoline_virt;
@ -88,10 +98,12 @@ grub_relocator_xen_boot (struct grub_relocator *rel,
grub_relocator_xen_remapper_map_high = (mfn_list[remapper_pfn] >> 20);
grub_relocator_xen_mmu_op_addr = (char *) &grub_relocator_xen_mmu_op
- (char *) &grub_relocator_xen_remap_start + remapper_virt;
grub_relocator_xen_paging_areas_addr =
(char *) &grub_relocator_xen_paging_areas
- (char *) &grub_relocator_xen_remap_start + remapper_virt;
#endif
grub_relocator_xen_mfn_list = state.mfn_list
+ state.paging_start * sizeof (grub_addr_t);
grub_relocator_xen_mfn_list = state.mfn_list;
grub_memset (grub_relocator_xen_mmu_op, 0,
sizeof (grub_relocator_xen_mmu_op));
@ -100,9 +112,9 @@ grub_relocator_xen_boot (struct grub_relocator *rel,
#else
grub_relocator_xen_mmu_op[0].cmd = MMUEXT_PIN_L4_TABLE;
#endif
grub_relocator_xen_mmu_op[0].arg1.mfn = mfn_list[state.paging_start];
grub_relocator_xen_mmu_op[0].arg1.mfn = mfn_list[state.paging_start[0]];
grub_relocator_xen_mmu_op[1].cmd = MMUEXT_NEW_BASEPTR;
grub_relocator_xen_mmu_op[1].arg1.mfn = mfn_list[state.paging_start];
grub_relocator_xen_mmu_op[1].arg1.mfn = mfn_list[state.paging_start[0]];
grub_relocator_xen_mmu_op[2].cmd = MMUEXT_UNPIN_TABLE;
grub_relocator_xen_mmu_op[2].arg1.mfn =
mfn_list[grub_xen_start_page_addr->pt_base >> 12];