Contents of /trunk/kernel26-xen/patches-2.6.25-r1/1021-2.6.25-xen-x86_64-Split-set_pte_vaddr.patch
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Revision 606 -
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Thu May 22 23:13:13 2008 UTC (15 years, 11 months ago) by niro
File size: 2039 byte(s)
Thu May 22 23:13:13 2008 UTC (15 years, 11 months ago) by niro
File size: 2039 byte(s)
-ver bump to 2.6.25-magellan-r1: - linux-2.6.25.4 - fbcondecor-0.9.4 - squashfs-3.3 - unionfs-2.3.3 - tuxonice-3.0-rc7 - linux-phc-0.3.0 - acpi-dstd-0.9a - reiser4 - xen-3.2.0 . ipw3945-1.2.2
| 1 | From 94105deeacbfac6e4baceb55e79b60c7301c03f6 Mon Sep 17 00:00:00 2001 |
| 2 | From: Eduardo Habkost <ehabkost@redhat.com> |
| 3 | Date: Fri, 8 Feb 2008 12:41:04 -0200 |
| 4 | Subject: [PATCH] x86_64: Split set_pte_vaddr() |
| 5 | |
| 6 | We will need to set a pte on l3_user_pgt. Extract set_pte_vaddr_pud() |
| 7 | from set_pte_vaddr(), that will accept the l3 page table as |
| 8 | parameter. |
| 9 | |
| 10 | This change should be a no-op for existing code. |
| 11 | |
| 12 | Signed-off-by: Eduardo Habkost <ehabkost@redhat.com> |
| 13 | Signed-off-by: Mark McLoughlin <markmc@redhat.com> |
| 14 | --- |
| 15 | arch/x86/mm/init_64.c | 33 +++++++++++++++++++++------------ |
| 16 | 1 files changed, 21 insertions(+), 12 deletions(-) |
| 17 | |
| 18 | diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c |
| 19 | index 00628b5..65d2a75 100644 |
| 20 | --- a/arch/x86/mm/init_64.c |
| 21 | +++ b/arch/x86/mm/init_64.c |
| 22 | @@ -121,23 +121,14 @@ static __init void *spp_getpage(void) |
| 23 | return ptr; |
| 24 | } |
| 25 | |
| 26 | -void |
| 27 | -set_pte_vaddr(unsigned long vaddr, pte_t pteval) |
| 28 | +static void |
| 29 | +set_pte_vaddr_pud(pud_t *pud_page, unsigned long vaddr, pte_t pteval) |
| 30 | { |
| 31 | - pgd_t *pgd; |
| 32 | pud_t *pud; |
| 33 | pmd_t *pmd; |
| 34 | pte_t *pte; |
| 35 | |
| 36 | - pr_debug("set_pte_phys %lx to %lx\n", vaddr, native_pte_val(pteval)); |
| 37 | - |
| 38 | - pgd = pgd_offset_k(vaddr); |
| 39 | - if (pgd_none(*pgd)) { |
| 40 | - printk(KERN_ERR |
| 41 | - "PGD FIXMAP MISSING, it should be setup in head.S!\n"); |
| 42 | - return; |
| 43 | - } |
| 44 | - pud = pud_offset(pgd, vaddr); |
| 45 | + pud = pud_page + pud_index(vaddr); |
| 46 | if (pud_none(*pud)) { |
| 47 | pmd = (pmd_t *) spp_getpage(); |
| 48 | set_pud(pud, __pud(__pa(pmd) | _KERNPG_TABLE | _PAGE_USER)); |
| 49 | @@ -170,6 +161,24 @@ set_pte_vaddr(unsigned long vaddr, pte_t pteval) |
| 50 | __flush_tlb_one(vaddr); |
| 51 | } |
| 52 | |
| 53 | +void |
| 54 | +set_pte_vaddr(unsigned long vaddr, pte_t pteval) |
| 55 | +{ |
| 56 | + pgd_t *pgd; |
| 57 | + pud_t *pud_page; |
| 58 | + |
| 59 | + pr_debug("set_pte_vaddr %lx to %lx\n", vaddr, native_pte_val(pteval)); |
| 60 | + |
| 61 | + pgd = pgd_offset_k(vaddr); |
| 62 | + if (pgd_none(*pgd)) { |
| 63 | + printk(KERN_ERR |
| 64 | + "PGD FIXMAP MISSING, it should be setup in head.S!\n"); |
| 65 | + return; |
| 66 | + } |
| 67 | + pud_page = (pud_t*)pgd_page_vaddr(*pgd); |
| 68 | + set_pte_vaddr_pud(pud_page, vaddr, pteval); |
| 69 | +} |
| 70 | + |
| 71 | /* |
| 72 | * The head.S code sets up the kernel high mapping: |
| 73 | * |
| 74 | -- |
| 75 | 1.5.4.1 |
| 76 |