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Merge branch 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

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Pull x86/platform changes from Ingo Molnar:
 "This cleans up some Xen-induced pagetable init code uglies, by
  generalizing new platform callbacks and state: x86_init.paging.*"

* 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86: Document x86_init.paging.pagetable_init()
  x86: xen: Cleanup and remove x86_init.paging.pagetable_setup_done()
  x86: Move paging_init() call to x86_init.paging.pagetable_init()
  x86: Rename pagetable_setup_start() to pagetable_init()
  x86: Remove base argument from x86_init.paging.pagetable_setup_start
This commit is contained in:
Linus Torvalds 2012-10-01 11:14:17 -07:00
commit a5fa7b7d8f
6 changed files with 20 additions and 32 deletions
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6
arch/x86/include/asm/pgtable_types.h
View File

@ -303,11 +303,9 @@ void set_pte_vaddr(unsigned long vaddr, pte_t pte);
extern void native_pagetable_reserve(u64 start, u64 end);
#ifdef CONFIG_X86_32
extern void native_pagetable_setup_start(pgd_t *base);
extern void native_pagetable_setup_done(pgd_t *base);
extern void native_pagetable_init(void);
#else
#define native_pagetable_setup_start x86_init_pgd_noop
#define native_pagetable_setup_done x86_init_pgd_noop
#define native_pagetable_init paging_init
#endif
struct seq_file;

9
arch/x86/include/asm/x86_init.h
View File

@ -81,12 +81,13 @@ struct x86_init_mapping {
/**
* struct x86_init_paging - platform specific paging functions
* @pagetable_setup_start: platform specific pre paging_init() call
* @pagetable_setup_done: platform specific post paging_init() call
* @pagetable_init: platform specific paging initialization call to setup
* the kernel pagetables and prepare accessors functions.
* Callback must call paging_init(). Called once after the
* direct mapping for phys memory is available.
*/
struct x86_init_paging {
void (*pagetable_setup_start)(pgd_t *base);
void (*pagetable_setup_done)(pgd_t *base);
void (*pagetable_init)(void);
};
/**

4
arch/x86/kernel/setup.c
View File

@ -961,9 +961,7 @@ void __init setup_arch(char **cmdline_p)
kvmclock_init();
#endif
x86_init.paging.pagetable_setup_start(swapper_pg_dir);
paging_init();
x86_init.paging.pagetable_setup_done(swapper_pg_dir);
x86_init.paging.pagetable_init();
if (boot_cpu_data.cpuid_level >= 0) {
/* A CPU has %cr4 if and only if it has CPUID */

4
arch/x86/kernel/x86_init.c
View File

@ -26,7 +26,6 @@
void __cpuinit x86_init_noop(void) { }
void __init x86_init_uint_noop(unsigned int unused) { }
void __init x86_init_pgd_noop(pgd_t *unused) { }
int __init iommu_init_noop(void) { return 0; }
void iommu_shutdown_noop(void) { }
@ -68,8 +67,7 @@ struct x86_init_ops x86_init __initdata = {
},
.paging = {
.pagetable_setup_start = native_pagetable_setup_start,
.pagetable_setup_done = native_pagetable_setup_done,
.pagetable_init = native_pagetable_init,
},
.timers = {

11
arch/x86/mm/init_32.c
View File

@ -445,10 +445,10 @@ static inline void permanent_kmaps_init(pgd_t *pgd_base)
}
#endif /* CONFIG_HIGHMEM */
void __init native_pagetable_setup_start(pgd_t *base)
void __init native_pagetable_init(void)
{
unsigned long pfn, va;
pgd_t *pgd;
pgd_t *pgd, *base = swapper_pg_dir;
pud_t *pud;
pmd_t *pmd;
pte_t *pte;
@ -475,10 +475,7 @@ void __init native_pagetable_setup_start(pgd_t *base)
pte_clear(NULL, va, pte);
}
paravirt_alloc_pmd(&init_mm, __pa(base) >> PAGE_SHIFT);
}
void __init native_pagetable_setup_done(pgd_t *base)
{
paging_init();
}
/*
@ -493,7 +490,7 @@ void __init native_pagetable_setup_done(pgd_t *base)
* If we're booting paravirtualized under a hypervisor, then there are
* more options: we may already be running PAE, and the pagetable may
* or may not be based in swapper_pg_dir. In any case,
* paravirt_pagetable_setup_start() will set up swapper_pg_dir
* paravirt_pagetable_init() will set up swapper_pg_dir
* appropriately for the rest of the initialization to work.
*
* In general, pagetable_init() assumes that the pagetable may already

18
arch/x86/xen/mmu.c
View File

@ -1174,8 +1174,13 @@ static void xen_exit_mmap(struct mm_struct *mm)
spin_unlock(&mm->page_table_lock);
}
static void __init xen_pagetable_setup_start(pgd_t *base)
static void xen_post_allocator_init(void);
static void __init xen_pagetable_init(void)
{
paging_init();
xen_setup_shared_info();
xen_post_allocator_init();
}
static __init void xen_mapping_pagetable_reserve(u64 start, u64 end)
@ -1192,14 +1197,6 @@ static __init void xen_mapping_pagetable_reserve(u64 start, u64 end)
}
}
static void xen_post_allocator_init(void);
static void __init xen_pagetable_setup_done(pgd_t *base)
{
xen_setup_shared_info();
xen_post_allocator_init();
}
static void xen_write_cr2(unsigned long cr2)
{
this_cpu_read(xen_vcpu)->arch.cr2 = cr2;
@ -2068,8 +2065,7 @@ static const struct pv_mmu_ops xen_mmu_ops __initconst = {
void __init xen_init_mmu_ops(void)
{
x86_init.mapping.pagetable_reserve = xen_mapping_pagetable_reserve;
x86_init.paging.pagetable_setup_start = xen_pagetable_setup_start;
x86_init.paging.pagetable_setup_done = xen_pagetable_setup_done;
x86_init.paging.pagetable_init = xen_pagetable_init;
pv_mmu_ops = xen_mmu_ops;
memset(dummy_mapping, 0xff, PAGE_SIZE);