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x86/paravirt/xen: add set_fixmap pv_mmu_ops

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Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Mark McLoughlin <markmc@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Jeremy Fitzhardinge 2008-06-17 11:42:01 -07:00 committed by Ingo Molnar
parent d494a96125
commit aeaaa59c7e
5 changed files with 63 additions and 4 deletions
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2
arch/x86/kernel/paravirt.c
View file

@ -416,6 +416,8 @@ struct pv_mmu_ops pv_mmu_ops = {
.enter = paravirt_nop,
.leave = paravirt_nop,
},
.set_fixmap = native_set_fixmap,
};
EXPORT_SYMBOL_GPL(pv_time_ops);

9
arch/x86/mm/pgtable.c
View file

@ -277,7 +277,7 @@ int ptep_clear_flush_young(struct vm_area_struct *vma,
int fixmaps_set;
void __set_fixmap (enum fixed_addresses idx, unsigned long phys, pgprot_t flags)
void __native_set_fixmap(enum fixed_addresses idx, pte_t pte)
{
unsigned long address = __fix_to_virt(idx);
@ -285,6 +285,11 @@ void __set_fixmap (enum fixed_addresses idx, unsigned long phys, pgprot_t flags)
BUG();
return;
}
set_pte_vaddr(address, pfn_pte(phys >> PAGE_SHIFT, flags));
set_pte_vaddr(address, pte);
fixmaps_set++;
}
void native_set_fixmap(enum fixed_addresses idx, unsigned long phys, pgprot_t flags)
{
__native_set_fixmap(idx, pfn_pte(phys >> PAGE_SHIFT, flags));
}

29
arch/x86/xen/enlighten.c
View file

@ -960,6 +960,33 @@ static unsigned xen_patch(u8 type, u16 clobbers, void *insnbuf,
return ret;
}
static void xen_set_fixmap(unsigned idx, unsigned long phys, pgprot_t prot)
{
pte_t pte;
phys >>= PAGE_SHIFT;
switch (idx) {
case FIX_BTMAP_END ... FIX_BTMAP_BEGIN:
#ifdef CONFIG_X86_F00F_BUG
case FIX_F00F_IDT:
#endif
case FIX_WP_TEST:
case FIX_VDSO:
#ifdef CONFIG_X86_LOCAL_APIC
case FIX_APIC_BASE: /* maps dummy local APIC */
#endif
pte = pfn_pte(phys, prot);
break;
default:
pte = mfn_pte(phys, prot);
break;
}
__native_set_fixmap(idx, pte);
}
static const struct pv_info xen_info __initdata = {
.paravirt_enabled = 1,
.shared_kernel_pmd = 0,
@ -1112,6 +1139,8 @@ static const struct pv_mmu_ops xen_mmu_ops __initdata = {
.enter = paravirt_enter_lazy_mmu,
.leave = xen_leave_lazy,
},
.set_fixmap = xen_set_fixmap,
};
#ifdef CONFIG_SMP

12
include/asm-x86/fixmap.h
View file

@ -9,8 +9,18 @@
extern int fixmaps_set;
extern void __set_fixmap(enum fixed_addresses idx,
void __native_set_fixmap(enum fixed_addresses idx, pte_t pte);
void native_set_fixmap(enum fixed_addresses idx,
unsigned long phys, pgprot_t flags);
#ifndef CONFIG_PARAVIRT
static inline void __set_fixmap(enum fixed_addresses idx,
unsigned long phys, pgprot_t flags)
{
native_set_fixmap(idx, phys, flags);
}
#endif
#define set_fixmap(idx, phys) \
__set_fixmap(idx, phys, PAGE_KERNEL)

13
include/asm-x86/paravirt.h
View file

@ -273,6 +273,13 @@ struct pv_mmu_ops {
#endif
struct pv_lazy_ops lazy_mode;
/* dom0 ops */
/* Sometimes the physical address is a pfn, and sometimes its
an mfn. We can tell which is which from the index. */
void (*set_fixmap)(unsigned /* enum fixed_addresses */ idx,
unsigned long phys, pgprot_t flags);
};
/* This contains all the paravirt structures: we get a convenient
@ -1252,6 +1259,12 @@ static inline void arch_flush_lazy_mmu_mode(void)
}
}
static inline void __set_fixmap(unsigned /* enum fixed_addresses */ idx,
unsigned long phys, pgprot_t flags)
{
pv_mmu_ops.set_fixmap(idx, phys, flags);
}
void _paravirt_nop(void);
#define paravirt_nop ((void *)_paravirt_nop)