xen64: use arbitrary_virt_to_machine for xen_set_pmd

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>

diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c
index 05d7392a7a4c59000b5a4c6c10d1c32724f8603d..a8f023271819ba2157341622433472146227002f 100644 (file)
--- a/arch/x86/xen/mmu.c
+++ b/arch/x86/xen/mmu.c
@@ -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);
 

diff --git a/include/asm-x86/xen/page.h b/include/asm-x86/xen/page.h
index a40be65e8eaeea48f6fe49c55d9f7b22e963ce1b..05e678a86628b5a7c53563f766eeb57652ed4014 100644 (file)
--- a/include/asm-x86/xen/page.h
+++ b/include/asm-x86/xen/page.h
@@ -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);