diff options
| author | Jeremy Fitzhardinge <jeremy@goop.org> | 2008-06-25 04:19:12 (GMT) |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-07-08 11:11:01 (GMT) |
| commit | eba0045ff87bab465d3c80c289f3bf709c1800f5 (patch) | |
| tree | e015805494c1ddb427fa568619163913270963bd /arch/x86 | |
| parent | 67350a5c4514c280665cdb45439d32a008a264ba (diff) | |
| download | linux-eba0045ff87bab465d3c80c289f3bf709c1800f5.tar.xz | |
x86/paravirt: add a pgd_alloc/free hooks
Add hooks which are called at pgd_alloc/free time. The pgd_alloc hook
may return an error code, which if non-zero, causes the pgd allocation
to be failed. The hooks may be used to allocate/free auxillary
per-pgd information.
also fix:
> * Ingo Molnar <mingo@elte.hu> wrote:
>
> include/asm/pgalloc.h: In function ‘paravirt_pgd_free':
> include/asm/pgalloc.h:14: error: parameter name omitted
> arch/x86/kernel/entry_64.S: In file included from
> arch/x86/kernel/traps_64.c:51:include/asm/pgalloc.h: In function ‘paravirt_pgd_free':
> include/asm/pgalloc.h:14: error: parameter name omitted
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: xen-devel <xen-devel@lists.xensource.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>
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/kernel/paravirt.c | 4 | ||||
| -rw-r--r-- | arch/x86/mm/pgtable.c | 13 | ||||
| -rw-r--r-- | arch/x86/xen/enlighten.c | 4 |
3 files changed, 16 insertions, 5 deletions
diff --git a/arch/x86/kernel/paravirt.c b/arch/x86/kernel/paravirt.c index e9b5045..78c9a1b 100644 --- a/arch/x86/kernel/paravirt.c +++ b/arch/x86/kernel/paravirt.c @@ -30,6 +30,7 @@ #include <asm/setup.h> #include <asm/arch_hooks.h> #include <asm/time.h> +#include <asm/pgalloc.h> #include <asm/irq.h> #include <asm/delay.h> #include <asm/fixmap.h> @@ -366,6 +367,9 @@ struct pv_mmu_ops pv_mmu_ops = { .flush_tlb_single = native_flush_tlb_single, .flush_tlb_others = native_flush_tlb_others, + .pgd_alloc = __paravirt_pgd_alloc, + .pgd_free = paravirt_nop, + .alloc_pte = paravirt_nop, .alloc_pmd = paravirt_nop, .alloc_pmd_clone = paravirt_nop, diff --git a/arch/x86/mm/pgtable.c b/arch/x86/mm/pgtable.c index 45b99ac..418c443 100644 --- a/arch/x86/mm/pgtable.c +++ b/arch/x86/mm/pgtable.c @@ -215,13 +215,15 @@ pgd_t *pgd_alloc(struct mm_struct *mm) /* so that alloc_pmd can use it */ mm->pgd = pgd; - if (pgd) + if (pgd) { pgd_ctor(pgd); - if (pgd && !pgd_prepopulate_pmd(mm, pgd)) { - pgd_dtor(pgd); - free_page((unsigned long)pgd); - pgd = NULL; + if (paravirt_pgd_alloc(mm) != 0 || + !pgd_prepopulate_pmd(mm, pgd)) { + pgd_dtor(pgd); + free_page((unsigned long)pgd); + pgd = NULL; + } } return pgd; @@ -231,6 +233,7 @@ void pgd_free(struct mm_struct *mm, pgd_t *pgd) { pgd_mop_up_pmds(mm, pgd); pgd_dtor(pgd); + paravirt_pgd_free(mm, pgd); free_page((unsigned long)pgd); } diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c index 76ad1ef..d62f14e 100644 --- a/arch/x86/xen/enlighten.c +++ b/arch/x86/xen/enlighten.c @@ -45,6 +45,7 @@ #include <asm/pgtable.h> #include <asm/tlbflush.h> #include <asm/reboot.h> +#include <asm/pgalloc.h> #include "xen-ops.h" #include "mmu.h" @@ -1153,6 +1154,9 @@ static const struct pv_mmu_ops xen_mmu_ops __initdata = { .pte_update = paravirt_nop, .pte_update_defer = paravirt_nop, + .pgd_alloc = __paravirt_pgd_alloc, + .pgd_free = paravirt_nop, + .alloc_pte = xen_alloc_pte_init, .release_pte = xen_release_pte_init, .alloc_pmd = xen_alloc_pte_init, |