x86/paravirt/xen: add set_fixmap pv_mmu_ops
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>
diff --git a/arch/x86/kernel/paravirt.c b/arch/x86/kernel/paravirt.c
index 74f0c5e..cf06670 100644
--- a/arch/x86/kernel/paravirt.c
+++ b/arch/x86/kernel/paravirt.c
@@ -416,6 +416,8 @@
.enter = paravirt_nop,
.leave = paravirt_nop,
},
+
+ .set_fixmap = native_set_fixmap,
};
EXPORT_SYMBOL_GPL(pv_time_ops);
diff --git a/arch/x86/mm/pgtable.c b/arch/x86/mm/pgtable.c
index 7498124..e9fb663 100644
--- a/arch/x86/mm/pgtable.c
+++ b/arch/x86/mm/pgtable.c
@@ -277,7 +277,7 @@
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 @@
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));
+}
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index c8a56e4..0ad8a64 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -960,6 +960,33 @@
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 @@
.enter = paravirt_enter_lazy_mmu,
.leave = xen_leave_lazy,
},
+
+ .set_fixmap = xen_set_fixmap,
};
#ifdef CONFIG_SMP
diff --git a/include/asm-x86/fixmap.h b/include/asm-x86/fixmap.h
index 934d6b4..44d4f82 100644
--- a/include/asm-x86/fixmap.h
+++ b/include/asm-x86/fixmap.h
@@ -9,8 +9,18 @@
extern int fixmaps_set;
-extern void __set_fixmap(enum fixed_addresses idx,
- unsigned long phys, pgprot_t flags);
+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)
diff --git a/include/asm-x86/paravirt.h b/include/asm-x86/paravirt.h
index 0f13b94..af85caf 100644
--- a/include/asm-x86/paravirt.h
+++ b/include/asm-x86/paravirt.h
@@ -273,6 +273,13 @@
#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 __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)