[Xen-devel] [PATCH v2 3/5] X86/XEN: Allow setup function x86_init.paging.pagetable_init to setup kernel pagetables

[Attilio Rao <attilio.rao@xxxxxxxxxx>]

Currently, x86_init.paging.pagetable_init relies on callers to setup the
kernel pagetable.  In order to unify the functionality of
x86_init.paging.pagetable_setup_start and x86_init.paging.pagetable_setup_done
allow the new setup function to perform the operation itself.

Signed-off-by: Attilio Rao <attilio.rao@xxxxxxxxxx>
---
 arch/x86/include/asm/pgtable_types.h |    2 +-
 arch/x86/kernel/setup.c              |    1 -
 arch/x86/kernel/x86_init.c           |    1 -
 arch/x86/mm/init_32.c                |    1 +
 arch/x86/xen/mmu.c                   |    1 +
 5 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/arch/x86/include/asm/pgtable_types.h 
b/arch/x86/include/asm/pgtable_types.h
index 0c01e07..c93cb8e 100644
--- a/arch/x86/include/asm/pgtable_types.h
+++ b/arch/x86/include/asm/pgtable_types.h
@@ -306,7 +306,7 @@ extern void native_pagetable_reserve(u64 start, u64 end);
 extern void native_pagetable_init(void);
 extern void native_pagetable_setup_done(pgd_t *base);
 #else
-#define native_pagetable_init        x86_init_pgd_init_noop
+#define native_pagetable_init        paging_init
 #define native_pagetable_setup_done  x86_init_pgd_done_noop
 #endif
 
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index 61b7d98..315fd24 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -962,7 +962,6 @@ void __init setup_arch(char **cmdline_p)
 #endif
 
        x86_init.paging.pagetable_init();
-       paging_init();
        x86_init.paging.pagetable_setup_done(swapper_pg_dir);
 
        if (boot_cpu_data.cpuid_level >= 0) {
diff --git a/arch/x86/kernel/x86_init.c b/arch/x86/kernel/x86_init.c
index 0e1e950..5f2478f 100644
--- a/arch/x86/kernel/x86_init.c
+++ b/arch/x86/kernel/x86_init.c
@@ -26,7 +26,6 @@
 
 void __cpuinit x86_init_noop(void) { }
 void __init x86_init_uint_noop(unsigned int unused) { }
-void __init x86_init_pgd_init_noop(void) { }
 void __init x86_init_pgd_done_noop(pgd_t *unused) { }
 int __init iommu_init_noop(void) { return 0; }
 void iommu_shutdown_noop(void) { }
diff --git a/arch/x86/mm/init_32.c b/arch/x86/mm/init_32.c
index 0e38e0e..e35b4b1 100644
--- a/arch/x86/mm/init_32.c
+++ b/arch/x86/mm/init_32.c
@@ -475,6 +475,7 @@ void __init native_pagetable_init(void)
                pte_clear(NULL, va, pte);
        }
        paravirt_alloc_pmd(&init_mm, __pa(base) >> PAGE_SHIFT);
+       paging_init();
 }
 
 void __init native_pagetable_setup_done(pgd_t *base)
diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c
index ff1af97..4f47b87 100644
--- a/arch/x86/xen/mmu.c
+++ b/arch/x86/xen/mmu.c
@@ -1176,6 +1176,7 @@ static void xen_exit_mmap(struct mm_struct *mm)
 
 static void __init xen_pagetable_init(void)
 {
+       paging_init();
 }
 
 static __init void xen_mapping_pagetable_reserve(u64 start, u64 end)
-- 
1.7.2.5


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