x86, 64-bit: split set_pte_vaddr()
We will need to set a pte on l3_user_pgt. Extract set_pte_vaddr_pud()
from set_pte_vaddr(), that will accept the l3 page table as parameter.
This change should be a no-op for existing code.
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Mark McLoughlin <markmc@redhat.com>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: xen-devel <xen-devel@lists.xensource.com>
Cc: Stephen Tweedie <sct@redhat.com>
Cc: Mark McLoughlin <markmc@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c
index e62cbdd..5c3305e 100644
--- a/arch/x86/mm/init_64.c
+++ b/arch/x86/mm/init_64.c
@@ -144,22 +144,13 @@
}
void
-set_pte_vaddr(unsigned long vaddr, pte_t new_pte)
+set_pte_vaddr_pud(pud_t *pud_page, unsigned long vaddr, pte_t new_pte)
{
- pgd_t *pgd;
pud_t *pud;
pmd_t *pmd;
pte_t *pte;
- pr_debug("set_pte_vaddr %lx to %lx\n", vaddr, native_pte_val(new_pte));
-
- pgd = pgd_offset_k(vaddr);
- if (pgd_none(*pgd)) {
- printk(KERN_ERR
- "PGD FIXMAP MISSING, it should be setup in head.S!\n");
- return;
- }
- pud = pud_offset(pgd, vaddr);
+ pud = pud_page + pud_index(vaddr);
if (pud_none(*pud)) {
pmd = (pmd_t *) spp_getpage();
pud_populate(&init_mm, pud, pmd);
@@ -192,6 +183,24 @@
__flush_tlb_one(vaddr);
}
+void
+set_pte_vaddr(unsigned long vaddr, pte_t pteval)
+{
+ pgd_t *pgd;
+ pud_t *pud_page;
+
+ pr_debug("set_pte_vaddr %lx to %lx\n", vaddr, native_pte_val(pteval));
+
+ pgd = pgd_offset_k(vaddr);
+ if (pgd_none(*pgd)) {
+ printk(KERN_ERR
+ "PGD FIXMAP MISSING, it should be setup in head.S!\n");
+ return;
+ }
+ pud_page = (pud_t*)pgd_page_vaddr(*pgd);
+ set_pte_vaddr_pud(pud_page, vaddr, pteval);
+}
+
/*
* The head.S code sets up the kernel high mapping:
*