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xen64: use arbitrary_virt_to_machine for xen_set_pmd

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When building initial pagetables in 64-bit kernel the pud/pmd pointer may
be in ioremap/fixmap space, so we need to walk the pagetable to look up the
physical address.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: Stephen Tweedie <sct@redhat.com>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Cc: Mark McLoughlin <markmc@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Jeremy Fitzhardinge 2008-07-08 15:06:55 -07:00 committed by Ingo Molnar
parent ebd879e397
commit ce803e705f
2 changed files with 7 additions and 4 deletions
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9
arch/x86/xen/mmu.c
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@ -178,8 +178,9 @@ void set_phys_to_machine(unsigned long pfn, unsigned long mfn)
p2m_top[topidx][idx] = mfn;
}
xmaddr_t arbitrary_virt_to_machine(unsigned long address)
xmaddr_t arbitrary_virt_to_machine(void *vaddr)
{
unsigned long address = (unsigned long)vaddr;
unsigned int level;
pte_t *pte = lookup_address(address, &level);
unsigned offset = address & ~PAGE_MASK;
@ -253,7 +254,8 @@ void xen_set_pmd_hyper(pmd_t *ptr, pmd_t val)
xen_mc_batch();
u.ptr = virt_to_machine(ptr).maddr;
/* ptr may be ioremapped for 64-bit pagetable setup */
u.ptr = arbitrary_virt_to_machine(ptr).maddr;
u.val = pmd_val_ma(val);
extend_mmu_update(&u);
@ -415,7 +417,8 @@ void xen_set_pud_hyper(pud_t *ptr, pud_t val)
xen_mc_batch();
u.ptr = virt_to_machine(ptr).maddr;
/* ptr may be ioremapped for 64-bit pagetable setup */
u.ptr = arbitrary_virt_to_machine(ptr).maddr;
u.val = pud_val_ma(val);
extend_mmu_update(&u);

2
include/asm-x86/xen/page.h
View file

@ -158,7 +158,7 @@ static inline pte_t __pte_ma(pteval_t x)
#define pgd_val_ma(x) ((x).pgd)
xmaddr_t arbitrary_virt_to_machine(unsigned long address);
xmaddr_t arbitrary_virt_to_machine(void *address);
void make_lowmem_page_readonly(void *vaddr);
void make_lowmem_page_readwrite(void *vaddr);